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Publication numberUS2574221 A
Publication typeGrant
Publication dateNov 6, 1951
Filing dateMar 16, 1946
Priority dateMar 16, 1946
Publication numberUS 2574221 A, US 2574221A, US-A-2574221, US2574221 A, US2574221A
InventorsModigliani Piero
Original AssigneeJohns Manville
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method of forming a multilayered mat of intercrossed filaments
US 2574221 A
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Description  (OCR text may contain errors)

NOV. 6, 1951 p MOD|GL|AN| 2,574,221

METHOD OF FORMING A MULTILAYERED MAT OF INTERCROSSED FILAMENTS Flled March 16, 1946 77047/VEY.

Patented Nov. 6, 1951 METHOD 0F FORMING A MULTILAYERED MAT OF INTERCROSSED FILAMENTS Piero Modigliani, Manhasset, N. Y., assignor to Johns-Manville Corporation, New York, N. Y., a corporation of New York Application March 16, 1946, Serial No. 654,828

5 Claims. (Cl. 154-90) accumulated on a rotating drum. 'I'he furnace i laments of each of the layers accumulated on the drum are crossed suitably at acute angles to the filaments of adjacent layers. When the mat is built up to the desired thickness it is removed lfrom the drum and stretched in a direction substantially perpendicular to the original lay of the filaments, whereby the mat is expanded or opened in a manner similar to that of a lazy.

tongs, the angles between the fibers opening to increase the porosity and to reduce the density and thickness of the mat. The resultant mat has been employed both with and without the addition of an adhesive binder for many purposes.

The instant invention is particularly concerned with the provision of an improved mat which will have high strength and stretch-resistant characteristics in all directions. 'I'he invention also has for an object the provision of a mat with a. glossy and more attractive surface than the mats heretofore obtained, the surfacebeing subject to ornamentation. The mat may be used in many situations Where the prior mats are not wholly successful, due to their surface characteristics, stretchability or other undesirable features eliminated by the instant construction. 'l y Another object of the invention is the provision of a product including an expanded base mat or layer and a finish mat or layer on one surface of the base, the mats being integrated into a substantially unitary body.

A further object `of the invention is the provision of a methodv of forming a product of a type attaining the foregoing objects.

A still further object of the invention is the provision of a method involving the production of an expanded mat and the accumulation on said mat of a fllamentary surface layer in which the'filaments lie approximately transversely vto the fibers of the first mat.

`A still further obiect of the invention is the provision of a method employing a filamentdrawing apparatus such as a rotating drum of -and drum are relatively reciprocated so that the l 2 substantially conventional typeas a support for the first mat while the second mat is built up thereon.

My invention will be more fully understood and further objects and advantages thereof will become apparent when reference is made to the more detailed description of a preferred embodiment of the invention which is to follow and to the accompanying drawing in which:

Fig. 1 is a perspective view of a product of the instant invention;

Fig. 2 is' a diagrammatic, elevational view of a portion of an apparatus employed in producing .the product of Fig. 1;

Fig.' 3 is a sectional view taken on the line 3-3 of Fig. 2; n

Fig. 4 is a diagrammatic, perspective view of a mat of intercrossed glass filaments as employed in the instant invention and illustrating the condition of the mat before and after stretching operations;

Fig. 5 is' a diagrammatic, end view ofv additional equipment employed in the production of the instant product; and,

Fig 6 is a top plan view of the apparatus shown in Fig. 5.

Referring now to the drawings and particularly to Fig. 1, the product of the instant invention includes a base layer or mat l0 composed of intercrossed, continuous or substantially continuous fine filaments I2. The mat is of preferably open, reticulated structure with the filaments crossing each other at approximately right angles to one another. Preferably fine glass filaments of a diameter range, say, between 6 and 18 microns make up the mats, although filaments of other sizes and/or other fusible materials may be employed. The filaments of mat I0 may be bound together by a suitable adhesive or binder as, for example, a water-soluble, thermo-setting resin, i. e., phenol-formaldehyde. urea formaldehyde or the like. or a hinder such as gelatin. Water insoluble binders of any suitable type, such as polyvinyl alcohols. acryol, etc., or combinations of water-soluble and water insoluble binders may be employed. The binder is used in minor proportions, say, from 2-25% by weight of the mat, and is preferably disseminated substantially uniformly throughout the mat.

Qverlying layer I 0 is a second filamentary' layer H also 'composed of substantially'continuous filaments, suitably of the same kind 'employed in mat I0. The filaments I8 of this layer extendapproximately transversely to the filaments of mat Il and are preferably in substantial parallelism. Filaments il are bound to each other and mats Il and il are bound into a substantially integral product by an adhesive binder which may be of the same type as used in the formation of mat il. However, the binders need not be the same in both mats, nor do the binders for either of the mats need to be selected from those specifically referred to, as any other adhesives having the properties desired for `a particular service may be employed.

Filaments i2 and I6 are drawn from a fusible material, such as a glass melt, and in the manner fully explained below. Although the mats Il and Il have been referred to in some instances as layers. it will be understood that each is made up of a plurality of laps or laminations of the glass filaments to produce a body of appreciable thickness. Also, although the nlamenis of mat I4 preferably all' lie in approximate parallelism, this is not critical and they may also intercross to a substantial extent. as long as they extend approximately transversely to the lay of the bers in mat i0.

Surface layer or mat Il, particularly when the fibers are in substantial parallelism as in the preferred construction provides a glossy, lightreflective surface which adapts the product for use as a decorative medium and for other purposes for which the expanded mat Iii alone is I not suitable. The glossy, light-reflective surface of the product may be printed or otherwise decorated and also mat Il may be colored as desired.

Referring now particularly to Figs. 2-6, the method of forming the product described above will be explained in detail. Mat III is preferably fabricated by following substantially the conventional practice as described, for example, in my said Patent #2,081,060. In Figs. 2 and 3, there is diagrammatically shown a filament accumulating or drawing drum Il of the type employed in the patented method. The fiber integrally connected to glass issuing through the spinning orifices of a glass furnace 2l of any suitable type is brought into contact with the drum and continuously drawn directly from the glass furnace by rotation of the drum in the direction indicated by the arrow. Furnace 20 is reclprocated relatively to the drum, as indicated by the double-headed arrow in Fig. 3, to lay the glass filaments onto the drum in a plurality of layers of continuous spirals. withthe filaments of each layer crossing the filaments of adjacent layers. When the mat is built up to the desired thickness on drum Il, it is removed, suitably by slitting it axially of the drum, and is transferred to a conveyor or the like 22 which feeds it to a stretching device, indicated generally at Il. The stretching device may be of the type shown, for example, in my said Patent #2,081,060, but preferably an apparatus of the type 'described and claimed in the co-pending application of Robert E. Slack et al., S. N. 606,247, filed July 20, 1945, now Patent No. 2,486,217, is employed to secure a superior product.

Referring particularly to Fig. 4, the effect of the stretching operation is diagrammatically illustrated. The mat, as received from the drum. conventionally referred to at this stage as a condensed mat," is indicated by the reference character 26 and, after the strecthing operation. is indicated by the reference character 2l. As shown, the angular relationship between the fibers is altered as the mat is drawn or stretched. to produce a thinner, more open, reticulated structure.

adhesive is set and hardened. A section 33,-in-

dicated by the dot-dash lines Il of Fig. 4, is then cut from the mat, the section being of a length a equal to the circumference of a fiber-drawing or accumulator drum which may be drum Il employed for the original ber-drawing operation or which may be a separate, but preferably similar drum as shown at 38 in Figs. 5 and 8. Section I3 is wrapped onto the drum with its longitudinal dimension a extending circumferentially of the drum and secured by connecting the end edges with strips of adhesive tape or the like 3l. Drum 3l is then rotated and filaments II drawn from a glass furnace (not shown) which may be furnace 2l or one similar in all respects to furnace 2l, and the drawn filaments wrapped on the drum to overlie mat Il and form a surfacing layer or mat thereon. The fiber drawing is continued to wind a plurality of laps or layers of the laments to build up a mat of the desired thickness. Suitably the reciprocation of the furnace or of the drum, as the case may be, is relatively slow to lay the filaments of the second laps or layers in substantial parallelism, with the filaments extending approximately at right angles to the axis of the drum. However, the rate of reciprocation may be such as to lay the filaments in layers at acute angles to adjacent layers, similarly as in the formation of the original mat on the drum II but the more parallel accumulation of the filaments is preferred, as previously pointed out.

An adhesive or binder such as a water-soluble resin or gelatin, or a combination of watersoluble binders and water-insoluble binders. as referred to above, is sprayed onto the filaments or onto the mat of laments as the filaments are accumulated. For this purpose a spray device Il is located adjacent the point of wrapping of the filaments on the drum. The spray device may be of any suitable type comprising, for example, a pipe extending longitudinally of the drum, the pipe being connected to any suitable binder supply. The pipe is provided with a plurality of nozzles directed toward the drum. 'I'he ports or nozzles are relatively small to spray the binder against the drum in finely-divided or atomiaed form.

Drying means are employed to set the binder as the mat I 4 is accumulated on the drum. Such drying means, indicated generally at l2. may be of any suitable or'conventional type such as a battery of infra-red ray lamps. gas burners or the like. The drying means serves to set up the adhesive so that the combined product, when the mat I4 is built up to the desired thickness, may be directly removed from the drum. After removal, the mat is divided into segments of the selected size for the particular use for which the product is intended.

If desired a coloring material such as any of the known coloring compositions may be sprayed onto the mat I l during its formation to insure uniform depth of color of the surfacing layer. The coloring material may be included with the binder or may be supplied by a separate spray device.' indicated at 44.

The method described above provides a simple. effective and economical way of producing the product as shown in Fig. 1. 'I'he product may be varied in a number of particulars without the necessity of making major adjustments in the method or apparatus by which it is produced. The mat I may be expanded to any extent desired, within the limits permitted by the character of the material, during the stretching operation to provide a base mat of greater or lesser porosity, thickness and strength by merely properly adjusting the speed of the drawing mechanism. The surface mat may consist of substantially parallel fibers or of intercrossed fibers, by proper adjustment of the rate of traverse of the furnace relative to the drum during the accumulation of the mat on the base mat l0. Various colors may be employed in any suitable or desired arrangement.

Having thus described my invention in rather full detail, it will be understood that these details need not be strictly adhered to but that various changes and modifications may suggest themselves to one skilled in the art, all falling within the scope of the invention as defined by the subjoined claims.

What I claim is:

1. The method comprising forming a multilayer mat of intercrossed filaments, stretching said mat, accumulating a second filamentary mat on said first mat with the filaments of said second mat extending generally in the direction of stretch of said first mat. and adhesively securing the second mat to the first mat.

l 2. The method comprising forming a multi- .layer mat of intercrossed filaments, stretching said mat, applying an adhesive to said stretched mat, accumulating a second filamentary mat on said first mat with the filaments of the second mat extending generally in the direction of stretch of the first mat, and applying an adhesive to said filaments of said second mat as they are accumulated.

3. The method comprising forming a multilayer mat of intercrossed fllaments, stretching said mat, applying an adhesive to said mat, placing said mat on a filament accumulating device, simultaneously drawing filaments from a raw material supply and collecting them on said mat, and applying adhesive to said flla- 5. The method comprising forming a filamen-`r tary mat having a plurality of coextensive layers with the filaments of each layer in substantial parallelism and in intercrossing relationship with the filaments of adjacent layers, stretching said mat to increase the angular relationship between the filaments of the layers and to produce a more open, reticulated structure, accumulating a second filamentary mat on said first mat with the filaments of said second mat extending generally longitudinally of the iirst mat and crossing the filaments thereof, and adhering the filaments of said mat together, and said second mat to said first mat.

PIERO MODIGLIANI.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1771216 *Dec 9, 1926Jul 22, 1930Oscar GosslerInsulating body of spun glass
US2015006 *Nov 9, 1933Sep 17, 1935Maurice PagenelProcess of making storage battery separators
US2081060 *Mar 7, 1936May 18, 1937Piero ModiglianiProcess for the mechanical production of glass felt
US2117371 *Nov 11, 1933May 17, 1938Owensillinois Glass CompanyBattery separator plate
US2131024 *Oct 16, 1935Sep 27, 1938Thuringische GlaswollindustrieManufacture of fabric from spun glass
US2306347 *Jul 28, 1939Dec 22, 1942Owens Corning Fiberglass CorpMethod and apparatus for making fibrous glass products
US2315851 *Aug 2, 1940Apr 6, 1943Santee MillsStay strip
US2397936 *Sep 22, 1942Apr 9, 1946Goodrich Co B FShip-deck planking
US2399258 *Mar 20, 1943Apr 30, 1946American Viscose CorpNovel filamentous product and method of making it
GB323790A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2660546 *Jul 17, 1952Nov 24, 1953Holland Mfg Co IncMonofilament thread and method of making same
US2664375 *Jun 9, 1949Dec 29, 1953Owens Corning Fiberglass CorpMethod for producing an open mesh fabric of glass fibers
US2677007 *Feb 3, 1949Apr 27, 1954Owens Corning Fiberglass CorpRetainer and separator mats for storage batteries
US2692220 *Nov 19, 1951Oct 19, 1954Glass Fibers IncMethod for making glass paper
US2699415 *Feb 25, 1953Jan 11, 1955Owens Corning Fiberglass CorpMethod of producing refractory fiber laminate
US2705692 *Apr 7, 1952Apr 5, 1955Chicopee Mfg CorpLaterally extensible polyoriented nonwoven fabric and method of producing same
US2715596 *Jul 7, 1953Aug 16, 1955Hawley Products CoSheet material and method for the manufacture thereof
US2731376 *Dec 3, 1953Jan 17, 1956Rusch AdolpheMethod of making hollow laminated articles from unwoven fabric
US2758951 *Jul 23, 1953Aug 14, 1956Case James WGlass-reinforced plastic article
US2761802 *Mar 22, 1951Sep 4, 1956American Enka CorpProcess for manufacturing upholstering material
US2781287 *Feb 27, 1953Feb 12, 1957Tru Scale IncDimensionally stable sheet material for reproduction purposes
US2794480 *Aug 14, 1953Jun 4, 1957Eastman Kodak CoApparatus for the manufacture of filters composed of cellulose acetate
US2834702 *Aug 15, 1955May 13, 1958Nat Tank CoReinforced synthetic resin sheets
US2906656 *Nov 16, 1956Sep 29, 1959Case James WMethod of producing a glass-reinforced plastic article
US2919217 *Jun 5, 1953Dec 29, 1959Bobkowicz EmilianTextile webs
US2928121 *May 19, 1955Mar 15, 1960Friedrich & Dimmock IncApparatus for forming glass fiber mats
US2964439 *Dec 26, 1957Dec 13, 1960Johns ManvilleMethod of forming a multi-layer mat of intercrossed filaments
US2985941 *Oct 8, 1956May 30, 1961Minnesota Mining & MfgWoof fabric and method of making
US3000432 *Jul 1, 1955Sep 19, 1961Olken Neil LFabric and method of and apparatus for producing the same
US3014085 *Dec 12, 1958Dec 19, 1961Pittsburgh Plate Glass CoComposite glass fiber battery separator
US3022366 *Mar 30, 1955Feb 20, 1962Pittsburgh Plate Glass CoBattery separator and manufacture thereof
US3082140 *Aug 1, 1958Mar 19, 1963PirelliMethod and machine for forming annular bands
US3134704 *May 13, 1960May 26, 1964Reichhold Chemicals IncMethod of and apparatus for multiple forming and winding of glass and resin filaments
US3211906 *Jul 5, 1962Oct 12, 1965Rotaflex LtdLampshades, diffusers and the like
US3303010 *Feb 24, 1964Feb 7, 1967American Air Filter CoMethod and apparatus for making filamentous mats
US3318746 *Oct 18, 1962May 9, 1967Owens Corning Fiberglass CorpMethod for bonding bodies of multi-filament strands
US3342657 *Dec 24, 1963Sep 19, 1967Du PontProcess and apparatus for producing laminated oriented thermoplastic film
US3460321 *Sep 27, 1967Aug 12, 1969Canzoneri NicholasMethod of making an air filter
US3873291 *Mar 29, 1974Mar 25, 1975Nicofibers IncMethod of producing glass fiber mats
US4324572 *Feb 25, 1981Apr 13, 1982Daimler-Benz AktiengesellschaftSoot filter for an exhaust arrangement of an internal combustion engine
US4532169 *Oct 5, 1981Jul 30, 1985Ppg Industries, Inc.Contacting fibrous mat impregnated with matrix compatible polymer with high performance reinforcement fibers coated with said polymer to wet, while under tension to form tape, releasing tension
US4960451 *Aug 21, 1989Oct 2, 1990United Technologies CorporationMethod of making fused hollow composite articles
US4992124 *Feb 21, 1989Feb 12, 1991Nippon Petrochemicals Co., Ltd.Method of making cross-laminated stretched non-woven fabric
US5230726 *Apr 30, 1992Jul 27, 1993Morton International, Inc.Automobile inflatable air bags
US5312500 *Mar 12, 1990May 17, 1994Nippon Petrochemicals Co., Ltd.Non-woven fabric and method and apparatus for making the same
US5582907 *Jul 28, 1994Dec 10, 1996Pall CorporationFilters; tensile strength
US5586997 *Feb 16, 1995Dec 24, 1996Pall CorporationBag filter
US5652050 *Mar 1, 1996Jul 29, 1997Pall CorporationMicroporous membranes for separating, analyzing biological fluids
US5667749 *Aug 2, 1995Sep 16, 1997Kimberly-Clark Worldwide, Inc.Method for the production of fibers and materials having enhanced characteristics
US5711970 *Aug 2, 1995Jan 27, 1998Kimberly-Clark Worldwide, Inc.Apparatus for the production of fibers and materials having enhanced characteristics
US5807795 *Jun 2, 1997Sep 15, 1998Kimberly-Clark Worldwide, Inc.Method for producing fibers and materials having enhanced characteristics
US5811178 *Nov 15, 1996Sep 22, 1998Kimberly-Clark Worldwide, Inc.High bulk nonwoven sorbent with fiber density gradient
US5846438 *Jan 20, 1995Dec 8, 1998Pall CorporationFibrous web for processing a fluid
US5913329 *Mar 19, 1997Jun 22, 1999Kimberly-Clark Worldwide, Inc.High temperature, high speed rotary valve
US6074869 *Jul 27, 1995Jun 13, 2000Pall CorporationPreparing a melt-blown nonwoven web; comprising surface adjusting a melt-blown non-woven web characterized by timed fluid flow in different directions
Classifications
U.S. Classification156/167, 65/479, 156/171, 156/229, 55/489, 65/450, 210/496, 156/181
International ClassificationB29C70/00, D04H3/02
Cooperative ClassificationD04H3/02, B29C70/00, B29K2309/08
European ClassificationB29C70/00, D04H3/02