CN1176620A - 多层非织造纤网层合物 - Google Patents

多层非织造纤网层合物 Download PDF

Info

Publication number
CN1176620A
CN1176620A CN95197712A CN95197712A CN1176620A CN 1176620 A CN1176620 A CN 1176620A CN 95197712 A CN95197712 A CN 95197712A CN 95197712 A CN95197712 A CN 95197712A CN 1176620 A CN1176620 A CN 1176620A
Authority
CN
China
Prior art keywords
nonwoven web
web laminate
corona discharge
layer
multilayer nonwoven
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN95197712A
Other languages
English (en)
Inventor
B·科亨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kimberly Clark Worldwide Inc
Kimberly Clark Corp
Original Assignee
Kimberly Clark Worldwide Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kimberly Clark Worldwide Inc filed Critical Kimberly Clark Worldwide Inc
Publication of CN1176620A publication Critical patent/CN1176620A/zh
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/14—Air permeable, i.e. capable of being penetrated by gases
    • A41D31/145—Air permeable, i.e. capable of being penetrated by gases using layered materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/559—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/20—All layers being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/10—Fibres of continuous length
    • B32B2305/20—Fibres of continuous length in the form of a non-woven mat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2310/00—Treatment by energy or chemical effects
    • B32B2310/14—Corona, ionisation, electrical discharge, plasma treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2437/00—Clothing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/903—Microfiber, less than 100 micron diameter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
    • Y10T442/621—Including other strand or fiber material in a different layer not specified as having microdimensions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
    • Y10T442/626—Microfiber is synthetic polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/659—Including an additional nonwoven fabric
    • Y10T442/66—Additional nonwoven fabric is a spun-bonded fabric
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/659—Including an additional nonwoven fabric
    • Y10T442/668—Separate nonwoven fabric layers comprise chemically different strand or fiber material

Abstract

公开一种非织造纤网层合物,它具有改善的颗粒阻隔性能,特别是改善了对粒度在0.19微米～0.5微米范围内颗粒的阻隔性能。其颗粒阻隔性能的改善是借助对构成非织造纤网层合物的一个或多个层进行电晕放电处理而获得的。这种颗粒阻隔性能的改善还由于未显著改变或增加该非织造纤网层合物表面电荷量而实现。

Description

多层非织造纤网层合物
本发明涉及多层非织造纤网层合物以及用这种层合物制成的连衣裤。更具体地说，本发明涉及防护服。
有着许多种类旨在提供阻隔性能的使用次数有限的或用完即弃的防护服。一种防护服是用完即弃防护连衣裤，例如公开在美国专利4,670,913的连衣裤，该文收作本文的参考文献。连衣裤可用来以开放或大氅式防护服，例如垂帘或罩衣等无法做到的方式，有效地将穿戴者封罩起来，免受有害环境的侵害。因此，连衣裤对希望将穿戴者隔离开来的场合有着广泛的用途。
防护服应能够防液体透过。出于各种各样的原因，不希望液体和/或被液体携带的病原体透过衣服接触到工作在存在病原体环境中的人员。
类似地，将工作地点或事故现场中可能存在的有害物质与人隔离开来是十分理想的。为了增加防护服恰当穿着的机会从而减少暴露的机会，如果工人穿着一种相对地不透液体和/或颗粒、经久而又不失舒适，以便不降低工人的工作效率的防护服，将会使其受益。使用后，要消除经暴露于有毒、害物质之后的防护服所受到的污染，通常是成本十分高昂的。因此，防护服应廉价到允许用完即弃的程度是十分重要的。
一般而言，希望用完即弃防护服用相对不透液和/或颗粒的布料制作。这类阻隔型布料还必须适合以低成本制成防护服，以便在仅仅使用一次之后便丢弃在经济上合理。
这样一种通常用非织造纤网层合物制成以保证其用完即弃符合成本效益原则的用完即弃防护服，是Kimberly-Clark公司制作的、商品名为Kleenguard的连衣裤。这种防护服是用3层非织造纤网层合物制成的。两个外层由纺粘聚丙烯纤维构成，内层由熔喷微细聚丙烯纤维构成。纺粘外层提供坚韧、耐用和耐磨的表面。内层不但拒水而且起着透气的、过滤性阻隔层的作用，让空气和水汽透过布料层整体，同时滤除许多有害颗粒。
在某些情况下，构成防护服的材料可包括薄膜层或薄膜层合物。用薄膜制作防护服虽然可改善防止颗粒透过防护服整体的性能，但是这样的薄膜或薄膜层合物也会阻止空气及水汽透过。一般而言，由不允许空气及水汽顺畅透过的材料构成的防护服，长时间正常穿着会使穿戴者不舒服。
因此，虽说在某些情况下，薄膜或薄膜层合物能提供的颗粒阻隔性能比非织造层合布好，但是非织造层合布能提供好得多的穿着舒适性。因此，存在着对廉价用完即弃防护服的需要，尤其是用这样一种非织造布制成的廉价用完即弃防护服的需要：它提供较好的颗粒阻隔性能，同时又是透气的，因而长时间正常穿着时仍感觉舒适。
本发明的目的在于克服上述种种问题，满足上述对颗粒阻隔性能有所改善要求的非织造布的需要。
这一目的是通过独立权利要求1的多层非织造纤网层合物以及独立权利要求7的连衣裤实现的。
以上的二权利要求应广义地理解为是用常用术语来界定本发明的首次及非限定表述的方法。本发明的其他有利特征、方面及细节，读了各从属权利要求及描述将会一目了然。
较具体地说，本发明提供用颗粒阻隔性能更好的非织造布构成的防护服。
本发明提供一种适合制作防护服，诸如连衣裤的非织造纤网层合物。按照一个方面，该非织造纤网层合物包括：一个由纺粘纤维构成的层及一个由熔喷纤维构成的层，其中至少一层经过电晕放电处理。在一个实施方案中，由熔喷纤维构成的层经过电晕放电处理。
按照另一个方面，本发明的非织造纤网层合物包括由纺粘纤维构成的两个层。由纺粘纤维构成的这两层中间夹着一个由熔喷纤维构成的层。该实施方案的非织造纤网层合物可经过电晕放电处理，或者各单个层，例如由熔喷纤维构成的层可接受电晕放电处理。
按照又一个方面，本发明提供用本发明的多层非织造纤网层合物制成的连衣裤。
按照上述诸方面的实施方案显示出与未经电晕放电处理的用类似方法制成的非织造纤网层合物相比改善了颗粒过滤效率。更具体地说，电晕放电处理非织造纤网层合物对0.19微米～0.3微米范围内颗粒的颗粒过滤效率，与未经电晕放电处理非织造纤网层合物相比，至少是提高约85％。电晕放电处理非织造纤网层合物对0.3微米～0.5微米范围内颗粒的颗粒过滤效率与未电晕放电处理非织造纤网层合物相比，至少是提高约29％。
而且，在颗粒过滤效率上的上述改善的取得，不要求在非织造纤网层合物的一个或多个表面形成比电晕放电处理前明显高的电荷量。
这里所用的“非织造纤网”一词是指这样一种纤网，它具有由单根纤维或丝互相绞缠而成的，而不是以可辨认的重复方式组成的结构。
这里所使用的“纺粘纤维”一词是指这样的小直径纤维，其制取方法是：将熔融热塑性材料从一种纺丝板的通常为圆形的许多细孔中挤出成为一束丝，然后通过诸如以下文献所述的方法使挤出丝的直径迅速变细：授予Appel等人的美国专利4,340,563及授予Dorschner等人的美国专利3,692,618、授予Matsuki等人的美国专利3,802,817、授予Kinney的美国专利3,338,992及3,341,394、授予Levy的美国专利3,502,763及3,909,009,以及授予Dobo等人的美国专利3,542,615，这些均收作本文的参考文献。纺粘纤维通常是连续的，其直径大于7微米，特别是平均直径大于10微米。
这里所使用的“熔喷纤维”一词是指这样的纤维，其制取方法是：将熔融热塑性材料从许多细小的、通常为圆形的模板孔中以熔融丝或丝束的形式挤出到高速、通常是加热的气体(例如空气)流中，气流将熔融热塑性材料的丝束拉细，以致可将其直径降低到微纤维直径的水平。此后，该熔喷纤维被高速气流夹带并沉积到收集表面上，形成由无规散落的熔喷纤维组成的纤网。熔喷法在技术上是熟知的，例如公开在授予Buntin的美国专利3,849,241中、授予Meitner等人的美国专利4,307,143中以及授予Wisneski等人的美国专利4,707,398中，这些专利内容全部收作本文的参考文献。熔喷纤维属于微纤维，其直径通常小于10微米。
这里所使用的“微细纤维”或“微纤维”一词是指平均直径不大于约100微米的细直径纤维，例如其平均直径约为0.5微米～约50微米，或者特别是，微纤维的平均直径可为约1微米～约20微米。平均直径约3微米或更细的微纤维通常叫做超细微纤维。超细微纤维的示范制取方法的描述可见诸于题为“具有改进阻隔性能的非织造纤网”的美国专利5,213,881，该全文收作本文的参考文献。
聚合物十分适合用来制成用于实施本发明的非织造纤网。非织造纤网可用多种多样的方法制造，包括但不限于，空气铺网法、湿铺网法、水力缠结法、纺粘、熔喷、短纤维梳理并粘合以及溶液纺丝。构成这类非织造纤网的纤维可用多种多样电介质材料制成，包括但不限于，聚酯、聚烯烃、尼龙及这些材料的共聚物。这类纤维可为比较短的，即短纤维长度的纤维，典型地小于7.62厘米(3英寸)或是较长、较为连续的纤维，例如用纺粘法制取的纤维。
据发现，用以热塑性材料为主，特别是聚烯烃为主构成的纤维所制成的非织造纤网特别适合上述的用途。这类纤维的例子包括纺粘纤维和熔喷纤维。用这类纤维制成的这类非织造纤网的例子是由登记的受让人，Kimberly-Clark公司生产的聚丙烯非织造纤网。
本发明包括一种多层非织造纤网层合物。在一个实施方案中，多层非织造纤网层合物包括至少一个由纺粘纤维构成的层和由熔喷纤维构成的另一层，例如一种纺粘/熔喷(SM)非织造纤网层合物。在另一个实施方案中，多层非织造纤网层合物包括至少一个由熔喷纤维构成的层，它将两个由纺粘纤维构成的层隔开，例如一种纺粘/熔喷/纺粘(SMS)非织造纤网层合物。这些非织造纤网层合物的例子公开在授予Brock等人的美国专利4,041,203、授予Collier等人的美国专利5,169,706以及授予Bornslaeger的美国专利4,374,888中，这些均收作本文的参考文献。SMS非织造纤网的层合物的制造方法可包括：顺序地向运动着的成形带表面首先沉积一纺粘纤网层，随后沉积一熔喷布层，最后是另一纺粘层，然后用下面所描述的一种方式将该层合物粘合。替代地，可单独制作这3个布层，收集成卷材，然后在单独进行的粘合步骤中将它们结合在一起。此种布料的单位重量一般为约3～400克/平方米(gsm)(0.1～12盎司/平方码(osy))，或者更具体地约25～100gsm(0.75～约3osy))。
多层非织造纤网层合物通常在其生产过程中以某种方式进行粘合，以便赋予其足够的结构整体性，以承受在进一步加工成最终产品的过程中所受到的各种力。粘合可采用多种方式完成，例如水力缠结、针刺、超声粘合、粘合剂粘合以及热粘合。
超声粘合例如可借助让多层非织造纤网层合物从一个超声波发生器与一个砧辊之间通过完成，例如如同授予Bornslaeger的美国专利4,374,888中所描述的。
多层非织造纤网层合物的热粘合可借助让其从热轧机的两个辊筒之间通过完成。热轧机辊筒中至少一个是加热的，且二辊之一，不一定与加热辊为同一辊，带有花纹，随着层合物从二辊之间通过，该花纹便压印在其上了。当布料通过二辊之间时受到压力和热的作用。以一种特定花纹形式施加的热与压力的联合作用在多层非织造纤网层合物中形成熔结粘合区，其中的粘合点对应于热轧辊表面粘合点的花纹。
开发出了各式各样的热轧辊花纹。一个例子是如授予Hansen及Pennings的美国专利3,855,046中所公开的扩展的Hansen Pennings花纹，它具有约10～25％粘合面积以及约15.5～77.5个粘合点/平方厘米(100～500个粘合点/平方英寸)。另一种常用的花纹是由重复然而稍许偏置的菱形组成的菱形花纹。
用于粘合多层非织造纤网层合物的准确轧辊温度及压力与用以制作该非织造纤网的热塑性材料有关。一般对用聚烯烃制成的多层非织造纤网层合物而言，优选的温度为66～177℃(150～350°F)，压力为525～1750牛顿/厘米(300～1000磅/线英寸)。更具体地说，对聚丙烯而言，优选的温度为132～160℃(270～320°F)，压力为700～1400牛顿/厘米(400～800磅/线英寸)。
本领域技术人员对非织造纤网进行电晕放电处理的方法是熟知的。扼要地说，电晕放电过程是通过对一个位于电场接受装置(EFRS)附近的电场激发装置(EFIS)施加足够的电压实现的。该电压应高到足以使EFIS处产生离子并从EFIS流向EFRS。EFIS和EFRS最好都由导电材料构成。合适的导电材料包括铜、钨、不锈钢及铝。
对非织造纤网进行电晕放电处理的另一种特殊技术是转让给田纳西大学的、1992年10月9日提交的美国专利申请07/958,958的技术，该申请全文收作本文的参考文献。该项技术涉及让非织造纤网经受一对极性相反的电场的作用。每个电场都形成电晕放电。
在包括多层的非织造纤网的情况下，可让非织造纤网的整个厚度都经受电晕放电的作用。在其他情况下，可让构成非织造纤网层合物的一个或多个单独的层或构成该单独层的纤维分别经受电晕放电作用，然后再以彼此叠合的关系与其他层结合，形成非织造纤网层合物。在某些情况下，正如将要在下面的实例中所看到的，在纤网经受电晕放电之前的非织造纤网层合物上的电荷与电晕放电后纤网上的电荷基本上相等。换句话说，在纤网经受电晕放电之后，非织造纤网层合物所带有的电荷量一般不高于纤网经受电晕放电之前纤网上存在的电荷量。
为了表征本发明的特性，对一种SMS聚丙烯非织造纤网层合物以及一种由聚丙烯熔喷纤维构成的层进行了电晕放电处理，其细节见诸于下文。在对上述非织造纤网在电晕放电之前及之后进行的分析中，包括两组颗粒过滤试验。一组颗粒过滤试验通常叫做氯化钠过滤器效率试验(以下称氯化钠试验)。氯化钠试验是在一台自动过滤试验机上进行的，其型号为CertitestTM8110型，生产者：TSI公司，St.Paul，MN。以百分率表示的试验布料的颗粒过滤效率的定义是100×(1-(下游颗粒数量/上游颗粒数量))。上游颗粒数量代表加入到试验机中的颗粒总数量。下游颗粒数量是加入到试验机中并通过了试验布料整体的颗粒数量。试验机利用供应的空气流量，在本试验情况下为32升/分，来确定过滤介质的效率。该空气流中含有已知数量的大约0.1微米氯化钠气溶胶颗粒，呈分散状。在大约32升/分空气流量的条件下，试验布料上游侧的气氛与试验布料下游侧的气氛之间形成4～5毫米水柱表压的压力降。
另一项颗粒过滤试验通常称作“BTTG试验”。BTTG代表英国纺织工业集团，位于英国的曼彻斯特。大致地说，BTTG试验涉及借助风扇将颗粒状物质，例如滑石粉，分散到试验布料的“污染”一侧。风扇将含有颗粒的空气吹向试验布料的表面，而且经调节，在试验布料污染侧的气氛与试验布料相反一侧的气氛之间造成选定的压力降(即5毫米水柱表压)。用粒子计数器测定污染气氛中不同粒度范围的粉尘颗粒浓度和试验布料相反一侧气氛中的粉尘颗粒浓度(即透过试验布料的颗粒浓度)。对给定粒度范围而言，试验布料的过滤效率，以百分率表示被定义为100×(1-(污染侧颗粒数量/相反一侧的颗粒数量))。污染侧颗粒数量是引入到试验布料污染侧空气中的各种粒度颗粒的总数量。相反侧颗粒数量代表不同粒度污染侧颗粒透过试验布料整体的数量。
实例1
在实例1中，制备了一定数量的约61克/平方米(1.8osy)聚丙烯SMS非织造纤网层合物。其纺粘层是用聚丙烯树脂Exxon PD-3445及Himont PF-301制成的。分别在制作纺粘层之一的聚丙烯树脂中加入白色及深蓝色颜料，Ampacet 41438(Ampacet公司，NY)及SCC4402(Standrige Color公司，GA)。另一纺粘层用不带颜料的同样的聚丙烯树脂制成。用不合颜料的聚丙烯树脂Himont PF-015制作了熔喷层。
熔喷层的平均单位重量为约15.3克/平方米(约0.45osy)，每一纺粘层的平均单位重量为约22.9克/平方米(约0.675osy)。对一定数量的这种约61克/平方米(1.8osy)的SMS进行了电晕放电处理(SMS-CD)。用以产生电晕放电的设备为：型号P/N25A-120伏，50/60赫兹可逆极性供电装置(Simco公司，Hatfield，PA)，它与EFIS相连接，以及型号P16V120V，.25A，50/60赫兹供电装置(Simco公司，Hatfield，PA)，它与EFRS相连接。EFIS是一根RC-3ChargeMaster充电棒(Simoo公司)，EFRS是一根实心、直径约7.62厘米(3英寸)的铝质辊筒。电晕放电的环境为约21℃(70°F)及40％相对湿度。如同上面田纳西大学专利申请中所述，使用了两组EFIS/EFRS。加在第一组EFIS/EFRS的电压分别为15千伏/0.0伏。加在第二组EFIS/EFRS的电压分别为25千伏/7.5千伏。每组EFIS与EFRS之间的间隙设定为2.54厘米(1英寸)。
对经过电晕放电处理的61克/平方米(1.8osy)SMS非织造纤网层合物(SMS-CD)和未经电晕放电处理的61克/平方米(1.8osy)SMS非织造纤网层合物(SMS)均采用BTTG试验方法进行了颗粒过滤效率的测定。结果载于表1。
                    表1
             颗粒过滤效率(％)
                 颗粒粒度(微米)
     .19～.3  .3～.5   .5～1     1～3     3～5布料SMS-CD    76.5     89.4     96.4     98.2     97.6SMS       41.3     68.1     84.4     92.1     94.8
实例2
在实例2中，制备了一定数量的约61克/平方米(1.8osy)聚丙烯SMS非织造纤网层合物。本实例SMS试样中的熔喷及纺粘层的平均单位重量与实例1中相同。但是，在制备一部分SMS非织造纤网时，对熔喷层进行电晕放电处理，然后将其与纺粘层粘合。本实例产生电晕放电的条件、设备及设备安排均与实例1基本相同。
对经过电晕放电处理的61.克/平方米(1.8osy)SMS非织造纤网层合物(SMS-CD)和未经电晕放电处理的61克/平方米(1.8osy)SMS非织造纤网层合物(SMS)均采用BTTG试验方法进行了颗粒过滤效率的测定。结果载于表2。
                       表2
                 颗粒过滤效率(％)
                     颗粒粒度(微米)
      .19～.3  .3～.5    .5～1     1～3    3～5布料SMS-MCD    58.5     84.9      94.1     97.5    98.3SMS        21.7     65.6      83.9     94.2    96.9
来自实例1和2的数据说明，由于对整个非织造纤网层合物或者对构成非织造纤网层合物的一个层进行了电晕放电处理，颗粒过滤效率有了改善，尤其是粒度在0.19～0.5微米范围内颗粒的颗粒过滤效率有了改善。
关于实例1，电晕放电处理的SMS(SMS-CD)，对粒度在0.19～0.3微米范围内颗粒的颗粒过滤效率与未经电晕放电处理SMS(SMS)相比改善约85.2％。与SMS相比，SMS-CD对粒度在0.3微米～0.5微米范围内的颗粒的颗粒过滤效率改善约31.3％。
对实例2，用电晕放电处理的熔喷层制作的SMS布料(SMS-CD)，对粒度在0.19微米～0.3微米范围内的颗粒的颗粒过滤效率与未经电晕放电处理的SMS(SMS)相比改善约169.6％。与SMS相比，SMS-MCD对粒度在0.3微米～0.5微米范围内颗粒的颗粒过滤效率改善约29.4％。
实例3
在实例3中，分别制备了3种约61克/平方米(1.8osy)聚丙烯SMS非织造纤网层合物，其中每种SMS试样的熔喷及纺粘层的平均单位重量与实例1中相同。
对实例3中每种SMS试样的一部分采用氯化钠试验方法测定了颗粒过滤效率。测定了一种未经电晕放电处理的SMS试样(SMS)的表面电荷量。对经过电晕放电处理的另一种SMS试样(SMS-CD)则在电晕放电处理之后测定了表面电荷量。而其余的SMS试样的制备方法则是：首先将熔喷层进行电晕放电处理，然后将之与两个纺粘层(SMS-MCD)粘合起来。测定了所制备的SMS试样每一侧的表面电压，采用的是静电伏特计(Trek344型，Trek公司，Median，NY)，对各试样每一侧取至少10个读数的平均值。
SMS-CD以及SMS-MCD试样电晕放电的条件、使用的设备及设备安排均与实例1相同。结果载于表3。
                    表3
       电晕放电    A/B侧(伏)    过滤效率(％)布料SMS        未          -123/+63     33.6SMS-MCD    经过        +85/-14      71.4SMS-CD     经过        +38/+80      88.2
实例3结果显示，对SMS布料施行电晕放电处理所获得的颗粒过滤效率上的改善不需要在其表面上形成比电晕放电处理之前存在的显著高的电荷量。事实上，SMS布料表面电荷量在电晕放电处理前、后之差充其量也不过极小。
虽然就本发明的特定实施方案对本发明做了详细的描述，但本领域技术人员在理解了以上内容之后将很容易联想到上述实施方案的各种变换方案及等价方案。因此，本发明的范围应为本文所附权利要求所规定的范围及其任何等价内容。

Claims (8)

1.一种多层非织造纤网层合物，包括：
至少一个由纺粘纤维构成的层以及由熔喷纤维构成的另一层，其中至少一层经过电晕放电处理；而且其中该多层非织造纤网层合物对粒度在0.3微米～0.5微米范围内颗粒的颗粒过滤效率比未经电晕放电处理的用类似方法制成的多层非织造纤网层合物改善了至少约29％。
2.权利要求1的多层非织造纤网层合物，包括：至少两个由纺粘纤维构成的层以及至少一个由熔喷纤维构成的层，其中由熔喷纤维构成的层将两个由纺粘纤维构成的层隔开。
3.权利要求1或2的多层非织造纤网层合物，其中纺粘纤维和熔喷纤维系由聚丙烯制成。
4.以上权利要求之一的多层非织造纤网层合物，其中非织造纤网层合物的平均单位重量为约61克/平方米(约1.8盎司/平方码)。
5.以上权利要求之一的多层非织造纤网层合物，其中由熔喷纤维构成的层的平均单位重量为约15克/平方米(约0.45盎司/平方码)。
6.以上权利要求之一的多层非织造纤网层合物，其中熔喷纤维经过电晕放电处理。
7.一种由权利要求1～6之一的多层非织造纤网层合物制成的连衣裤。
8.权利要求7的连衣裤，它是防护服。
CN95197712A 1994-12-30 1995-12-21 多层非织造纤网层合物 Pending CN1176620A (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US36685094A 1994-12-30 1994-12-30
US08/366,850 1994-12-30

Publications (1)

Publication Number Publication Date
CN1176620A true CN1176620A (zh) 1998-03-18

Family

ID=23444828

Family Applications (1)

Application Number Title Priority Date Filing Date
CN95197712A Pending CN1176620A (zh) 1994-12-30 1995-12-21 多层非织造纤网层合物

Country Status (12)

Country Link
US (1) US5821178A (zh)
EP (1) EP0800456B1 (zh)
JP (1) JPH10512018A (zh)
KR (1) KR100388871B1 (zh)
CN (1) CN1176620A (zh)
AU (1) AU700221B2 (zh)
BR (1) BR9510563A (zh)
CA (1) CA2153278A1 (zh)
DE (1) DE69515338T2 (zh)
ES (1) ES2142507T3 (zh)
WO (1) WO1996020833A1 (zh)
ZA (1) ZA955713B (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100362162C (zh) * 2003-04-22 2008-01-16 王子制纸株式会社 湿纺非织造布及其制法
CN101854818B (zh) * 2007-11-09 2012-10-03 纳幕尔杜邦公司 污染控制服装

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19654798A1 (de) 1996-12-31 1998-07-02 Kirchhoff International Gmbh M Zellenkonstruktion für Bettmaterial und dgl.
JP4110240B2 (ja) * 1997-05-22 2008-07-02 ファイバーウェブ・シンプソンヴィル， インコーポレイテッド 使い捨て吸収用品のためのカバー素材
US6537932B1 (en) 1997-10-31 2003-03-25 Kimberly-Clark Worldwide, Inc. Sterilization wrap, applications therefor, and method of sterilizing
US6365088B1 (en) 1998-06-26 2002-04-02 Kimberly-Clark Worldwide, Inc. Electret treatment of high loft and low density nonwoven webs
US6709623B2 (en) 2000-12-22 2004-03-23 Kimberly-Clark Worldwide, Inc. Process of and apparatus for making a nonwoven web
US7488441B2 (en) * 2002-06-15 2009-02-10 Kimberly-Clark Worldwide, Inc. Use of a pulsating power supply for electrostatic charging of nonwovens
US20040002273A1 (en) * 2002-07-01 2004-01-01 Kimberly-Clark Worldwide, Inc. Liquid repellent nonwoven protective material
DE10319862A1 (de) * 2003-05-03 2004-12-09 Bundesrepublik Deutschland, vertreten durch das Bundesministerium der Verteidigung, dieses vertreten durch den Präsidenten des Bundesamtes für Wehrtechnik und Beschaffung Tarnoverall
KR100909749B1 (ko) * 2007-11-19 2009-07-29 도레이새한 주식회사 비직물조직 소재로 가공한 차량용 도막 보호용 커버 및그의 제조 방법
DE09702443T1 (de) * 2008-01-18 2011-04-07 MMI-IPCO, LLC, Lawrence Verbundgewebe
JP5699640B2 (ja) * 2011-01-31 2015-04-15 大日本印刷株式会社 積層体およびその製造方法
JP5699639B2 (ja) * 2011-01-31 2015-04-15 大日本印刷株式会社 積層体およびその製造方法
JP5699638B2 (ja) * 2011-01-31 2015-04-15 大日本印刷株式会社 積層体およびその製造方法
CN116059738B (zh) * 2023-02-22 2023-11-24 苏州大学 一种多功能非织造过滤材料及其制备方法

Family Cites Families (230)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US668791A (en) * 1899-03-16 1901-02-26 Lucien I Blake Process of electrical separation of conductors from non-conductors.
US813063A (en) * 1903-04-18 1906-02-20 Henry M Sutton Process of separating substances of different dielectric capacities.
US924032A (en) * 1906-03-17 1909-06-08 Blake Mining & Milling Company Electrostatic separating process.
US859998A (en) * 1906-12-20 1907-07-16 Huff Electrostatic Separator Company Method of electrical separation.
US1222305A (en) * 1914-10-27 1917-04-10 Jakob Kraus Electrostatic separator for inflammable materials.
US1297159A (en) * 1918-02-07 1919-03-11 Research Corp Electric separator.
US1355477A (en) * 1918-11-04 1920-10-12 United Chemical & Organic Prod Means for separating mixtures
US2106865A (en) * 1935-01-31 1938-02-01 American Lurgi Corp Method and apparatus for electrostatic separation
US2217444A (en) * 1938-04-06 1940-10-08 Westinghouse Electric & Mfg Co Method of and means for the manufacture of abrasive cloth
US2328577A (en) * 1940-01-12 1943-09-07 Behr Manning Corp Process and apparatus for grading and for coating with comminuted material
US2378067A (en) * 1942-09-28 1945-06-12 Petroleum Conversion Corp Process of cracking petroleum
US2398792A (en) * 1943-10-22 1946-04-23 Ritter Products Corp Electrostatic sizing of materials
US2748018A (en) * 1953-06-05 1956-05-29 Ransburg Electro Coating Corp Apparatus and method of electrostatic powdering
DE1084015B (de) 1957-09-27 1960-06-23 Max Himmelheber Dipl Ing Verfahren und Einrichtungen zur Herstellung von Formlingen, Kuchen oder Vliesen aus Holzspaenen od. ae. Schuettguetern
US2998051A (en) * 1958-04-04 1961-08-29 Walsco Company Method and apparatus for forming fibrous articles
US3012668A (en) * 1959-09-11 1961-12-12 Fraas Foster Electrostatic separator carrier electrode
US3338992A (en) * 1959-12-15 1967-08-29 Du Pont Process for forming non-woven filamentary structures from fiber-forming synthetic organic polymers
US3059772A (en) * 1960-09-28 1962-10-23 Int Minerals & Chem Corp Electrostatic separation in non-uniform field
US3125547A (en) * 1961-02-09 1964-03-17 Extrudable composition consisting of
US3502763A (en) * 1962-02-03 1970-03-24 Freudenberg Carl Kg Process of producing non-woven fabric fleece
NL294399A (zh) * 1962-06-22
US3281347A (en) * 1962-07-13 1966-10-25 Int Paper Co Method and apparatus for treating plastic coated paper
FR1374392A (fr) * 1963-06-27 1964-10-09 Sames Mach Electrostat Procédé de triage électrostatique et moyens pour la mise en oeuvre de ce procédé
US3341007A (en) * 1964-06-12 1967-09-12 Jr Mayer Mayer Fiber fractionating apparatus and process
US3436797A (en) * 1965-03-08 1969-04-08 Du Pont Method and apparatus for charging and combining continuous filaments of different polymeric composition to form a nonwoven web
US3380584A (en) * 1965-06-04 1968-04-30 Atomic Energy Commission Usa Particle separator
US3341394A (en) * 1966-12-21 1967-09-12 Du Pont Sheets of randomly distributed continuous filaments
US3542615A (en) * 1967-06-16 1970-11-24 Monsanto Co Process for producing a nylon non-woven fabric
US3581886A (en) * 1967-10-12 1971-06-01 Wintershall Ag Two-stage electrostatic separation of particulate material
US3849241A (en) * 1968-12-23 1974-11-19 Exxon Research Engineering Co Non-woven mats by melt blowing
US3692606A (en) * 1969-03-28 1972-09-19 Ransburg Electro Coating Corp Method of electrostatically depositing particles onto the trailing edge of a substrate
DE2048006B2 (de) * 1969-10-01 1980-10-30 Asahi Kasei Kogyo K.K., Osaka (Japan) Verfahren und Vorrichtung zur Herstellung einer breiten Vliesbahn
DE1950669C3 (de) * 1969-10-08 1982-05-13 Metallgesellschaft Ag, 6000 Frankfurt Verfahren zur Vliesherstellung
US3907604A (en) * 1969-10-09 1975-09-23 Exxon Research Engineering Co Nonwoven mat battery separators
CA948388A (en) * 1970-02-27 1974-06-04 Paul B. Hansen Pattern bonded continuous filament web
US3821021A (en) * 1972-02-29 1974-06-28 Du Pont Antistatically protected nonwoven polyolefin sheet
US3859330A (en) * 1972-03-15 1975-01-07 Du Pont Ultraviolet absorbing coating compositions
GB1453447A (en) * 1972-09-06 1976-10-20 Kimberly Clark Co Nonwoven thermoplastic fabric
US3979529A (en) * 1972-10-31 1976-09-07 Usm Corporation Electrostatic application of thermoplastic adhesive
US3962386A (en) * 1973-01-02 1976-06-08 Sun Research And Development Co. Corona discharge treatment of foam fibrillated webs
US3909009A (en) * 1974-01-28 1975-09-30 Astatic Corp Tone arm and phonograph pickup assemblies
US4011067A (en) * 1974-01-30 1977-03-08 Minnesota Mining And Manufacturing Company Filter medium layered between supporting layers
NL160303C (nl) * 1974-03-25 1979-10-15 Verto Nv Werkwijze voor het vervaardigen van een vezelfilter.
US3896802A (en) * 1974-04-19 1975-07-29 American Cyanamid Co Flexible flocked dressing
US4035164A (en) * 1974-11-29 1977-07-12 Minnesota Mining And Manufacturing Company Methods for removing charged and non-charged particles from a fluid by employing a pyrollectric filter
US4209563A (en) * 1975-06-06 1980-06-24 The Procter & Gamble Company Method for making random laid bonded continuous filament cloth
US4058724A (en) * 1975-06-27 1977-11-15 Minnesota Mining And Manufacturing Company Ion Scattering spectrometer with two analyzers preferably in tandem
DE2556723C3 (de) * 1975-12-17 1978-09-14 Hoechst Ag, 6000 Frankfurt Verfahren und Vorrichtung zum elektrostatischen Beschichten eines Bandes aus hydrophilem Material mit Puder aus einem modifizierten Celluloseether
US3973068A (en) * 1975-10-28 1976-08-03 Kimberly-Clark Corporation Soft, nonwoven web having high intensity and low intensity bonds and a lubricant on the surfaces of the synthetic filaments comprising said
US4013816A (en) * 1975-11-20 1977-03-22 Draper Products, Inc. Stretchable spun-bonded polyolefin web
US4091140A (en) * 1976-05-10 1978-05-23 Johnson & Johnson Continuous filament nonwoven fabric and method of manufacturing the same
US4353799A (en) * 1976-05-19 1982-10-12 Baxter Travenol Laboratories, Inc. Hydrophobic diffusion membranes for blood having wettable surfaces
US4103062A (en) * 1976-06-14 1978-07-25 Johnson & Johnson Absorbent panel having densified portion with hydrocolloid material fixed therein
US4430277A (en) * 1976-08-16 1984-02-07 The Goodyear Tire & Rubber Company Method for producing large diameter spun filaments
US4140607A (en) * 1976-11-22 1979-02-20 Forchungsinstitut Fur Textiltechnologie Method for modifying the surface of polymeric substrate materials by means of electron bombardment in a low pressure gas discharge
NL181632C (nl) * 1976-12-23 1987-10-01 Minnesota Mining & Mfg Electreetfilter en werkwijze voor het vervaardigen daarvan.
JPS5910046B2 (ja) * 1977-03-28 1984-03-06 新田ベルト株式会社 エレクトレツト化したエアフイルタ−用濾材の電荷保持構造
GB1578063A (en) * 1977-05-26 1980-10-29 British Cellophane Ltd Wrapping film
CA1097046A (en) * 1977-10-17 1981-03-10 Gary H. Meitner Microfiber oil and water wipe
US4215682A (en) * 1978-02-06 1980-08-05 Minnesota Mining And Manufacturing Company Melt-blown fibrous electrets
NO76617A (zh) * 1978-05-30
US4196245A (en) * 1978-06-16 1980-04-01 Buckeye Cellulos Corporation Composite nonwoven fabric comprising adjacent microfine fibers in layers
DE2927238A1 (de) 1978-07-07 1980-01-17 Holm Varde As Kunststoff-verstaerkungsfasern und verfahren zu ihrer herstellung
US4208366A (en) * 1978-10-31 1980-06-17 E. I. Du Pont De Nemours And Company Process for preparing a nonwoven web
NZ192629A (en) * 1979-02-05 1983-05-31 British Cellophane Ltd Treating plastics film by corona discharge electrodes constructed and spaced to prevent arc discharges
JPS5624013A (en) * 1979-05-04 1981-03-07 Nitta Kk Structure of air filter element
US4223677A (en) * 1979-05-11 1980-09-23 Scott Paper Company Absorbent fibrous structure and disposable diaper including same
DE2936754A1 (de) * 1979-09-12 1981-04-02 Weitmann & Konrad GmbH & Co KG, 7023 Echterdingen Vorrichtung zum elektrostatischen auftragen von in einem gasstrom mitgefuehrten materialteilchen auf eine vorlaufende, flaechige unterlage
EP0030418B1 (en) * 1979-12-07 1983-05-04 Imperial Chemical Industries Plc Process for producing a non-woven fabric
US4411795A (en) * 1980-03-10 1983-10-25 Baxter Travenol Laboratories, Inc. Particle adsorption
US4308223A (en) * 1980-03-24 1981-12-29 Albany International Corp. Method for producing electret fibers for enhancement of submicron aerosol filtration
FR2480807A1 (fr) * 1980-04-18 1981-10-23 Seplast Sa Procede de traitement superficiel d'une couche filtrante fibreuse, non tissee et tres aeree, formant electret et son application aux filtres et aux masques respiratoires notamment
US4340563A (en) * 1980-05-05 1982-07-20 Kimberly-Clark Corporation Method for forming nonwoven webs
ZA813132B (en) 1980-05-14 1982-12-29 Surgikos Inc Disposable surgical apparel and method of producing it
DE3120945A1 (de) * 1980-05-28 1982-04-08 Fuji Electric Co., Ltd., Kawasaki, Kanagawa Elektrostatische sortiervorrichtung
US4394235A (en) * 1980-07-14 1983-07-19 Rj Archer Inc. Heat-sealable polypropylene blends and methods for their preparation
DE3065174D1 (en) * 1980-09-15 1983-11-10 Freudenberg Carl Fa Filtering material
US4305797A (en) * 1980-11-24 1981-12-15 Carpco, Inc. Material separation by dielectrophoresis
JPS57105217A (en) * 1980-12-22 1982-06-30 Nitta Kk Fibrous filter medium
US4375718A (en) * 1981-03-12 1983-03-08 Surgikos, Inc. Method of making fibrous electrets
US4373224A (en) * 1981-04-21 1983-02-15 Duskinfranchise Kabushiki Kaisha Method for manufacturing a duster and the duster manufactured therefrom
US4363723A (en) * 1981-04-27 1982-12-14 Carpco, Inc. Multifield electrostatic separator
US4357234A (en) * 1981-05-18 1982-11-02 Canadian Patents & Development Limited Alternating potential electrostatic separator of particles with different physical properties
US4451589A (en) * 1981-06-15 1984-05-29 Kimberly-Clark Corporation Method of improving processability of polymers and resulting polymer compositions
US4374888A (en) * 1981-09-25 1983-02-22 Kimberly-Clark Corporation Nonwoven laminate for recreation fabric
IE53967B1 (en) 1981-11-24 1989-04-26 Kimberly Clark Ltd Microfibre web product
US4455237A (en) * 1982-01-05 1984-06-19 James River Corporation High bulk pulp, filter media utilizing such pulp, related processes
US4455195A (en) * 1982-01-05 1984-06-19 James River Corporation Fibrous filter media and process for producing same
US4507539A (en) * 1982-01-06 1985-03-26 Sando Iron Works Co., Ltd. Method for continuous treatment of a cloth with the use of low-temperature plasma and an apparatus therefor
US4443515A (en) * 1982-02-05 1984-04-17 Peter Rosenwald Antistatic fabrics incorporating specialty textile fibers having high moisture regain and articles produced therefrom
US4443513A (en) * 1982-02-24 1984-04-17 Kimberly-Clark Corporation Soft thermoplastic fiber webs and method of making
SU1091940A1 (ru) * 1982-02-26 1984-05-15 Украинский Институт Инженеров Водного Хозяйства Устройство дл очистки жидкости
DE3233528C1 (de) 1982-09-10 1984-04-12 Kali Und Salz Ag, 3500 Kassel Elektrostatischer Freifallscheider
JPS5994621A (ja) * 1982-11-12 1984-05-31 Unitika Ltd 防汚性繊維の製造法
US4514289A (en) * 1982-11-17 1985-04-30 Blue Circle Industries Plc Method and apparatus for separating particulate materials
US4588537A (en) 1983-02-04 1986-05-13 Minnesota Mining And Manufacturing Company Method for manufacturing an electret filter medium
US4513049A (en) * 1983-04-26 1985-04-23 Mitsui Petrochemical Industries, Ltd. Electret article
GR81673B (zh) 1983-05-06 1984-12-12 Personal Products Co
US4677017A (en) 1983-08-01 1987-06-30 Ausimont, U.S.A., Inc. Coextrusion of thermoplastic fluoropolymers with thermoplastic polymers
US4456648A (en) * 1983-09-09 1984-06-26 Minnesota Mining And Manufacturing Company Particulate-modified electret fibers
US4517143A (en) * 1983-10-03 1985-05-14 Polaroid Corporation Method and apparatus for uniformly charging a moving web
US4795668A (en) 1983-10-11 1989-01-03 Minnesota Mining And Manufacturing Company Bicomponent fibers and webs made therefrom
US4547420A (en) * 1983-10-11 1985-10-15 Minnesota Mining And Manufacturing Company Bicomponent fibers and webs made therefrom
US4729371A (en) 1983-10-11 1988-03-08 Minnesota Mining And Manufacturing Company Respirator comprised of blown bicomponent fibers
US4534918A (en) * 1983-10-27 1985-08-13 E. I. Du Pont De Nemours And Company Method and apparatus for the electrostatic pinning of polymeric webs
US4944854A (en) 1983-11-08 1990-07-31 Celanese Corporation Electret process and products
US4623438A (en) 1983-11-08 1986-11-18 Celanese Corporation Electret making process using corona discharge
JPS60168511A (ja) 1984-02-10 1985-09-02 Japan Vilene Co Ltd エレクトレツトフイルタの製造方法
US4594626A (en) 1984-02-13 1986-06-10 Xerox Corporation Air filtration system for rotating disk drives having recirculating air flows
DE3509857C2 (de) 1984-03-19 1994-04-28 Toyo Boseki Elektretisiertes Staubfilter und dessen Herstellung
JPS60196921A (ja) 1984-03-19 1985-10-05 東洋紡績株式会社 エレクトレツト化材料の製造法
JPS60209220A (ja) * 1984-04-04 1985-10-21 Koken Kk 静電式空気ろ過フィルタ
JPS60225416A (ja) 1984-04-24 1985-11-09 三井化学株式会社 高性能エレクトレツトおよびエアフイルタ−
US4671943A (en) 1984-04-30 1987-06-09 Kimberly-Clark Corporation Sterilization and storage container
US4555811A (en) * 1984-06-13 1985-12-03 Chicopee Extensible microfine fiber laminate
US4551378A (en) * 1984-07-11 1985-11-05 Minnesota Mining And Manufacturing Company Nonwoven thermal insulating stretch fabric and method for producing same
US4818464A (en) 1984-08-30 1989-04-04 Kimberly-Clark Corporation Extrusion process using a central air jet
DE3437183C2 (de) 1984-10-10 1986-09-11 Fa. Carl Freudenberg, 6940 Weinheim Mikroporöser Mehrschichtvliesstoff für medizinische Anwendungszwecke und Verfahren zu dessen Herstellung
US4874659A (en) 1984-10-24 1989-10-17 Toray Industries Electret fiber sheet and method of producing same
US4554207A (en) * 1984-12-10 1985-11-19 E. I. Du Pont De Nemours And Company Stretched-and-bonded polyethylene plexifilamentary nonwoven sheet
US4657639A (en) 1985-05-31 1987-04-14 The United States Of America As Represented By The Secretary Of The Air Force Apparatus for electrostatic filtration of N2 O4 for removal of solid and vapor contaminants
US4720415A (en) 1985-07-30 1988-01-19 Kimberly-Clark Corporation Composite elastomeric material and process for making the same
US4663220A (en) 1985-07-30 1987-05-05 Kimberly-Clark Corporation Polyolefin-containing extrudable compositions and methods for their formation into elastomeric products including microfibers
US4622259A (en) 1985-08-08 1986-11-11 Surgikos, Inc. Nonwoven medical fabric
US4657804A (en) 1985-08-15 1987-04-14 Chicopee Fusible fiber/microfine fiber laminate
US4699823A (en) 1985-08-21 1987-10-13 Kimberly-Clark Corporation Non-layered absorbent insert having Z-directional superabsorbent concentration gradient
JPH0714446B2 (ja) * 1985-10-28 1995-02-22 三井石油化学工業株式会社 エレクトレツト化不織布フイルタ−
US4705151A (en) 1985-10-31 1987-11-10 Automotive Product Plc Hydraulic slave cylinder interlock switching device with proximity sensor
JPH0673643B2 (ja) 1986-02-10 1994-09-21 ノードソン株式会社 不導電性かつ空隙性を有する被塗物への粉体の静電塗布方法とその装置
US4739882A (en) 1986-02-13 1988-04-26 Asyst Technologies Container having disposable liners
US4689241A (en) 1986-02-14 1987-08-25 Richart Douglas S Method for powder coating with electrostatic fluidized bed
US4652322A (en) 1986-02-28 1987-03-24 E. I. Du Pont De Nemours And Company Process for bonding and stretching nonwoven sheet
US4738772A (en) 1986-04-14 1988-04-19 Cpc International Inc. Process for separating fiber from dry-milled corn
JPS62263361A (ja) 1986-05-09 1987-11-16 東レ株式会社 不織布の製造方法
DE3787118T2 (de) 1986-05-28 1994-01-20 Daikin Ind Ltd Fluor enthaltende, Wasser und Ölabweisende Zubereitung.
US4948639A (en) 1986-07-31 1990-08-14 Kimberly-Clark Corporation Vacuum cleaner bag
US4797318A (en) 1986-07-31 1989-01-10 Kimberly-Clark Corporation Active particle-containing nonwoven material, method of formation thereof, and uses thereof
US4707398A (en) 1986-10-15 1987-11-17 Kimberly-Clark Corporation Elastic polyetherester nonwoven web
US4670913A (en) * 1986-10-16 1987-06-09 Kimberly-Clark Corporation Coverall with elastomeric panels
US4847914A (en) 1987-05-14 1989-07-18 Redi-Corp Protective Materials, Inc. Garment for protecting against environmental contamination
US4831664A (en) 1987-05-14 1989-05-23 Redi-Corp Protective Materials, Inc. Garment for protecting against environmental contamination
US4826703A (en) 1987-06-01 1989-05-02 Polaroid Corporation Method and apparatus for electrically controlling coating layer dimensions
US4761326A (en) 1987-06-09 1988-08-02 Precision Fabrics Group, Inc. Foam coated CSR/surgical instrument wrap fabric
DE3719420A1 (de) 1987-06-11 1988-12-29 Sandler Helmut Helsa Werke Atemschutzmaske
DE3731575A1 (de) 1987-09-19 1989-03-30 Freudenberg Carl Fa Filterpack
BR8804999A (pt) 1987-10-02 1989-05-02 Dyneema Vof Aparelhagens e processo para o tratamento de superficie de fios ou fibras sinteticas
US5183701A (en) 1987-10-02 1993-02-02 Dyneema V.O.F. Articles of highly oriented polyolefins of ultrahigh molecular weight, process for their manufacture, and their use
DE3839956C2 (de) 1987-11-28 1998-07-02 Toyo Boseki Elektret-Folie und Verfahren zu ihrer Herstellung
JPH01156578A (ja) * 1987-12-10 1989-06-20 Showa Denko Kk 吸水性複合体の製造方法
JPH01168364A (ja) 1987-12-24 1989-07-03 Toray Ind Inc 濾過方法
JPH0627361B2 (ja) 1988-01-06 1994-04-13 東レ株式会社 自己付着性を持つエプロン
EP0324601B1 (en) 1988-01-12 1994-03-23 Mitsui Petrochemical Industries, Ltd. Processes for preparing electret filters
US5055151A (en) 1988-01-21 1991-10-08 Greenstreak Plastic Products Company Porous filamentary mats and method of making same
US4874399A (en) 1988-01-25 1989-10-17 Minnesota Mining And Manufacturing Company Electret filter made of fibers containing polypropylene and poly(4-methyl-1-pentene)
FR2627498B1 (fr) 1988-02-19 1990-07-06 Labofina Sa Procede de traitement de polypropylene
US4920168A (en) 1988-04-14 1990-04-24 Kimberly-Clark Corporation Stabilized siloxane-containing melt-extrudable thermoplastic compositions
EP0337662A3 (en) 1988-04-14 1990-10-24 DON & LOW LIMITED Polymers
US4863983A (en) 1988-04-15 1989-09-05 Minnesota Mining And Manufacturing Company Extrudable thermoplastic hydrocarbon polymer composition
US4983677A (en) 1988-04-15 1991-01-08 Minnesota Mining And Manufacturing Company Extrudable thermoplastic hydrocarbon polymer composition
JP2672329B2 (ja) 1988-05-13 1997-11-05 東レ株式会社 エレクトレット材料
US4960820A (en) 1988-05-24 1990-10-02 Shell Oil Company Compositions and articles using high melt flow poly-1-butene and polypropylene blends
US4901370A (en) 1988-08-12 1990-02-20 Redi-Corp Protective Materials, Inc. Garment for protecting against environmental contamination
US4904174A (en) 1988-09-15 1990-02-27 Peter Moosmayer Apparatus for electrically charging meltblown webs (B-001)
US4965122A (en) 1988-09-23 1990-10-23 Kimberly-Clark Corporation Reversibly necked material
US5226992A (en) 1988-09-23 1993-07-13 Kimberly-Clark Corporation Process for forming a composite elastic necked-bonded material
US4863785A (en) 1988-11-18 1989-09-05 The James River Corporation Nonwoven continuously-bonded trilaminate
US4917942A (en) 1988-12-22 1990-04-17 Minnesota Mining And Manufacturing Company Nonwoven filter material
US5135724A (en) 1989-02-03 1992-08-04 Hoechst Aktiengesellschaft Process and apparatus for the surface treatment of sheet-like structures by electric corona discharge
GR900100242A (el) 1989-04-07 1991-09-27 Johnson & Johnson Medical Ηλεκτροστατικώς φορτιζόμενη μάσκα καλύψεως προσώπου και μέ?οδος κατασκευής της.
US5108827A (en) 1989-04-28 1992-04-28 Fiberweb North America, Inc. Strong nonwoven fabrics from engineered multiconstituent fibers
KR920700564A (ko) 1989-05-26 1992-08-10 원본미기재 방진용 모자
US5035941A (en) 1989-08-22 1991-07-30 Abandaco, Inc. Anti-static multilayer laminate comprising a non-woven layer extrusion coated with polymeric laminae, and method of making the same
US5188885A (en) 1989-09-08 1993-02-23 Kimberly-Clark Corporation Nonwoven fabric laminates
US5173356A (en) 1989-09-25 1992-12-22 Amoco Corporation Self-bonded fibrous nonwoven webs
CA2027687C (en) 1989-11-14 2002-12-31 Douglas C. Sundet Filtration media and method of manufacture
US5032419A (en) 1989-12-26 1991-07-16 Ball Corporation Method of electrostatically depositing smaller particles first
US5156902A (en) 1990-01-09 1992-10-20 Kimberly-Clark Corporation Method and apparatus for intermittently depositing particulate material in a substrate and article made therewith
US5169706A (en) 1990-01-10 1992-12-08 Kimberly-Clark Corporation Low stress relaxation composite elastic material
US5118942A (en) 1990-02-05 1992-06-02 Hamade Thomas A Electrostatic charging apparatus and method
US5012094A (en) 1990-02-05 1991-04-30 Hamade Thomas A Electrostatic charging apparatus and method
US5077468A (en) 1990-02-05 1991-12-31 Hamade Thomas A Electrostatic charging apparatus and method
US5149335A (en) 1990-02-23 1992-09-22 Kimberly-Clark Corporation Absorbent structure
CA2037942A1 (en) 1990-03-12 1991-09-13 Satoshi Matsuura Process for producing an electret, a film electret, and an electret filter
GB9006146D0 (en) 1990-03-19 1990-05-16 Wheway Plc Filter
US5344691A (en) 1990-03-30 1994-09-06 Minnesota Mining And Manufacturing Company Spatially modified elastic laminates
US5165979A (en) 1990-05-04 1992-11-24 Kimberly-Clark Corporation Three-dimensional polymer webs with improved physical properties
US5204174A (en) 1990-05-04 1993-04-20 Kimberly-Clark Corporation Fine fiber webs with improved physical properties
US5213881A (en) 1990-06-18 1993-05-25 Kimberly-Clark Corporation Nonwoven web with improved barrier properties
US5464688A (en) 1990-06-18 1995-11-07 Kimberly-Clark Corporation Nonwoven web laminates with improved barrier properties
JPH0465088A (ja) 1990-07-03 1992-03-02 Fuji Photo Film Co Ltd ウエブ帯電用装置
US5090975A (en) 1990-09-21 1992-02-25 The Drackett Company High efficiency vacuum cleaner bags
US5112048A (en) 1990-11-05 1992-05-12 Kienle Robert N Garage roof party game
US5145727A (en) 1990-11-26 1992-09-08 Kimberly-Clark Corporation Multilayer nonwoven composite structure
CA2048905C (en) 1990-12-21 1998-08-11 Cherie H. Everhart High pulp content nonwoven composite fabric
US5257982A (en) 1990-12-26 1993-11-02 Hercules Incorporated Fluid absorbing article utilizing a flow control cover sheet
FR2671969A1 (fr) 1991-01-30 1992-07-31 Celatose Sa Couche-culotte et son procede de fabrication.
US5306534A (en) * 1991-03-22 1994-04-26 Home Care Industries, Inc. Vacuum cleaner bag with electrostatically charged meltblown layer
TW211049B (zh) 1991-03-26 1993-08-11 Du Pont
JPH04330907A (ja) 1991-05-02 1992-11-18 Mitsui Petrochem Ind Ltd エレクトレットフィルターの製造方法
EP0520798A1 (en) 1991-06-26 1992-12-30 Peter Maurice Lock Absorptive materials, and methods for their production
JPH0517595A (ja) 1991-07-15 1993-01-26 Matsushita Electric Ind Co Ltd 高分子超薄膜エレクトレツト及びその製造方法
US5238733A (en) 1991-09-30 1993-08-24 Minnesota Mining And Manufacturing Company Stretchable nonwoven webs based on multi-layer blown microfibers
US5232770A (en) 1991-09-30 1993-08-03 Minnesota Mining And Manufacturing Company High temperature stable nonwoven webs based on multi-layer blown microfibers
US5247072A (en) 1991-10-25 1993-09-21 Kimberly-Clark Corporation Carboxyalkyl polysaccharides having improved absorbent properties and process for the preparation thereof
US5213882A (en) 1991-12-18 1993-05-25 W. L. Gore & Associates, Inc. Static dissipative nonwoven textile material
CA2070588A1 (en) 1991-12-31 1993-07-01 Kimberly-Clark Worldwide, Inc. Conductive fabric and method of producing same
JP3286998B2 (ja) 1992-01-08 2002-05-27 東レ株式会社 抗菌性エレクトレット材料
EP0561379B1 (en) 1992-03-17 1998-07-08 ASAHI MEDICAL Co., Ltd. Filter medium having a limited surface negative charge for treating a blood material
US5486411A (en) 1992-03-26 1996-01-23 The University Of Tennessee Research Corporation Electrically charged, consolidated non-woven webs
US5441550A (en) 1992-03-26 1995-08-15 The University Of Tennessee Research Corporation Post-treatment of laminated nonwoven cellulosic fiber webs
US5244482A (en) 1992-03-26 1993-09-14 The University Of Tennessee Research Corporation Post-treatment of nonwoven webs
US5443606A (en) 1992-03-26 1995-08-22 The University Of Tennessee Reserch Corporation Post-treatment of laminated nonwoven cellulosic fiber webs
US5264276A (en) 1992-04-06 1993-11-23 W. L. Gore & Associates, Inc. Chemically protective laminate
US5397413A (en) 1992-04-10 1995-03-14 Fiberweb North America, Inc. Apparatus and method for producing a web of thermoplastic filaments
US5286326A (en) 1992-05-12 1994-02-15 The Budd Company Method for binding fibers in a fiber reinforced preform using an electromagnetic field to melt binding fibers
US5230727A (en) 1992-06-05 1993-07-27 Cybermedic, Inc. Air filter for medical ventilation equipment and the like
DK0576738T3 (da) 1992-07-02 1997-10-27 Procter & Gamble Absorberende hydrogelsmåpartikler i absorberende strukturer
US5254297A (en) 1992-07-15 1993-10-19 Exxon Chemical Patents Inc. Charging method for meltblown webs
US5401446A (en) 1992-10-09 1995-03-28 The University Of Tennessee Research Corporation Method and apparatus for the electrostatic charging of a web or film
JP2849291B2 (ja) 1992-10-19 1999-01-20 三井化学株式会社 エレクトレット化不織布およびその製造方法
AU669420B2 (en) 1993-03-26 1996-06-06 Minnesota Mining And Manufacturing Company Oily mist resistant electret filter media
KR100323320B1 (ko) 1993-05-26 2002-06-20 고토 기치 여과재및이의제조방법
US5456972A (en) 1993-05-28 1995-10-10 The University Of Tennessee Research Corporation Method and apparatus for glow discharge plasma treatment of polymer materials at atmospheric pressure
JP3204801B2 (ja) 1993-06-18 2001-09-04 富士写真フイルム株式会社 真空グロー放電処理装置及び処理方法
DE69417041T2 (de) 1993-08-17 1999-07-15 Minnesota Mining & Mfg Verfahren zur aufladung von elektretfiltermedien
US5491022A (en) 1993-09-24 1996-02-13 Lakeland Industries, Inc. Protective fabrics and garments
US5308691A (en) 1993-10-04 1994-05-03 E. I. Du Pont De Nemours And Company Controlled-porosity, calendered spunbonded/melt blown laminates
US5455108A (en) 1993-12-30 1995-10-03 Kimberly-Clark Corporation Coated polymeric fabric having reduced adsorption of protein
US5436066A (en) 1993-12-30 1995-07-25 Kimberly-Clark Corporation Absorbent composition including a microfiber
US5482765A (en) 1994-04-05 1996-01-09 Kimberly-Clark Corporation Nonwoven fabric laminate with enhanced barrier properties

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100362162C (zh) * 2003-04-22 2008-01-16 王子制纸株式会社 湿纺非织造布及其制法
CN101854818B (zh) * 2007-11-09 2012-10-03 纳幕尔杜邦公司 污染控制服装

Also Published As

Publication number Publication date
ES2142507T3 (es) 2000-04-16
EP0800456A1 (en) 1997-10-15
ZA955713B (en) 1996-02-21
CA2153278A1 (en) 1996-07-01
MX9704831A (es) 1997-10-31
KR980700912A (ko) 1998-04-30
DE69515338D1 (de) 2000-04-06
WO1996020833A1 (en) 1996-07-11
DE69515338T2 (de) 2000-11-30
EP0800456B1 (en) 2000-03-01
US5821178A (en) 1998-10-13
AU700221B2 (en) 1998-12-24
KR100388871B1 (ko) 2004-03-26
BR9510563A (pt) 1999-01-05
AU4643296A (en) 1996-07-24
JPH10512018A (ja) 1998-11-17

Similar Documents

Publication Publication Date Title
CN1176620A (zh) 多层非织造纤网层合物
EP0564784B2 (en) Anisotropic nonwoven fibrous web
AU708641B2 (en) Nonwoven web dielectric electrects with surface treatments
CN100575073C (zh) 伸长性能改进的可伸长层合物的制造方法
US5534340A (en) Nonwoven materials comprising 0.5 to 1.2 decitex cardable polyolefin fibers and having liquid strike through resistance as well as air permeability
EP0690163B1 (en) Nonwoven laminated fabrics
CN1071386C (zh) 具有宽粘合范围的热塑性聚合物纤维和其用途以及赋予非织造布以宽粘合范围的方法
EP3239394B1 (en) Protective clothing
WO1997023265A1 (en) High efficiency dust sock
CN105745003A (zh) 用于擦拭物应用的非织造粘尘布
EP0815306B1 (en) Nonwoven laminate barrier material
EP3990147A1 (en) Filter assembly, prefilter assembly, and respirator including the same
GB2242142A (en) Filter
EP0619393B1 (en) Nonwoven materials made from fine decitex cardable polyolefin fibers
CN110039839B (zh) 一种防护服用层积无纺布及其制造方法和用途
MXPA97004831A (en) Laminated fabric non-tramado de capas multip
WO2020261150A1 (en) Core-sheath fibers, nonwoven fibrous web, and respirator including the same
CA2474282C (en) Electret filter media
MXPA98004241A (en) Dielectric electretes of non-woven fabric with superfi treatment
MXPA97006751A (en) A laminated barrier material not tej

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C01 Deemed withdrawal of patent application (patent law 1993)
WD01 Invention patent application deemed withdrawn after publication