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Publication numberUS2477344 A
Publication typeGrant
Publication dateJul 26, 1949
Filing dateFeb 20, 1945
Priority dateMar 1, 1944
Publication numberUS 2477344 A, US 2477344A, US-A-2477344, US2477344 A, US2477344A
InventorsSalomon Neumann
Original AssigneeShand Kydd Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Pregummed paper, eabric, and other materials
US 2477344 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Patented July 26, .1949

i "PATENT OFFICE l 52,477,344

l mama-mm EABEICANDJ.0'J2HER I J- l\!IATERIALS- 1 s'a'lomon-Neumanni.LondoniZEnglarid; assignor or one-half tdfshand liyddf himitedi'hondongqllngland, a British company :NoIDrawing. ApplicatioriFebnuarstZQ;1945;582-

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-%2 Claims. (Cl? ILL-A-IZZ) ri'al iscoated with adry adhesive which requires onlymoistening whenthe paper is to be applied to a wall or other surface. The invention is mainly (but not exclusively) concerned with the manufacture of pre-gummed wall-paper and other types of hanging paper, such as poster papers and bill-board papers.

It has hitherto been proposed to make pregummed wall-papers by sizing with ordinary dextrine, paste, glues or gums, but these papers have usually proved unsatisfactory, mostlybecause the applied size does not re-moisten and re-swell quickly enough, and when re-moistened, does not regain s'uflicient tackiness and slip for the proper hanging of the paper. An object of this invention is to provide an improved pregummed hanging paper which in its dry state is flexible and non-curling and in its wet state possesses good tackiness and slip characteristics so that it may readily be moved on the wall to the right position.

The invention deals with the method by which the adhesive is applied to the back of the paper or other surface to be coated. The invention provides a process for the manufacture of pregummed papers, cardboard, fabrics and like sheet materials of the type described characterised in that the adhesive is so constituted and so applied to the surface of the material to be coated that only part of the tackiness of the adhesive is developed in the application stage, thus leaving a coating of high effective concentration.

In one method of carrying the invention into efiect a water-soluble or water-swelling adhesive in powdered form is made up as a suspension in a liquid medium in which the adhesive is not soluble or only partly soluble. The suspension is then applied by spraying, brushing or in any other convenient way, and the coated material is finally dried. The suspending medium may be made by adding a proportion of water to a liquid in which the adhesive is wholly insoluble, or the adhesive may be a mixture of two or more diiierent substances, the main portion of the mixture being wholly insoluble in thesuspending medium while the remainder of the mixture is soluble. In carrying out the invention according to either of the above methods, any watersoluble or water-swelling adhesives, such as starches, starch-containing flours, chlorinated starches, dextrine, glues, gums or mixtures of crease its "slip characteristics. preventingtthe curling of the" paper may also be added "ifflesired.

' su'ch substances, may be employed. Bentonite orsim'ilar colloidal clay ofrhighswelling capacity may be embodied in theadhesive in order to in Chemicals for The following are examples of coating suspensions suitable for carrying out the invention according to the foregoing methods:

Example I The suspension comprises- Parts Alcohol 2 Light yellow dextrine 2 Bentonite 1 Water 2 Example II The suspension comprises- Parts Alcohol 2 Cold swelling paste powder (starch base) 1 Water 3 Example III The suspension comprises- Parts Acetone containing 2% cellulose acetate 2 Gum arabic 2 The above examples may be modified by increasing or decreasing the proportion of water in accordance with the thickness of film, tackiness and slip characteristics required for the individual paper.

In a further method of carrying out the invention the receiving surface of the material to be coated is first wetted with water or lightly coated with a thin film of adhesive paste, and a cold water-soluble adhesive in powdered form is then dusted over the wetted surface, after which the coatedmaterial is dried. The portions of the powder particles in contact with the Wetted surface of the material are dissolved and thus produce sufficient tackiness to hold the particles to the paper. In carrying this particular method into eiTect, any cold water-soluble adhesive, such as paste powder, soluble starch degradation products, glues and gums may be employed. As before bentonite will be added to the adhesive in order to increase the slip characteristics, and substances which are known to prevent curling of the paper or like material may also be embodied.

While, as already indicated, the invention is mainly concerned with the manufacture of wallpaper and similar hanging papers, it may also be applied to the manufacture of re-moistening tape and in general to the treatment of any material on which a pre-gummed coating is desired. I

Iclaim:

1. A process for the manufacture of pregummed wallpaper of the type in which the rear surface of the paper carries as a dry coating, a cold-water soluble r cold-water swelling adhesive from the class consisting of dextrine and starch, which requires only moistening when the paper is to be applied to a wall or like surface, said process comprising the steps of incorporating the aforesaid adhesive in powdered form in suspension in a liquid medium made by adding Water to a liquid in which the adhesive is wholly insoluble, the liquid phase of the suspension comprising substantially equal parts by weight of water and alcohol, applying the suspension to the ,rear surface of the paper, and drying the coating.

2. A process for the manufacture of pregummed wallpaper of the type in which the rear surfaceof the paper carries as a dry coating a cold-water soluble or cold-water swelling adhesive from the class consisting of dextrine and starch, which requires only moistening when the paper is to be applied to a wall or like surface, said process comprising the steps of incorporating the aforesaid adhesive in powdered. form; in suspension in a liquid medium made by adding water to a liquid in which the adhesive is wholly insoluble, the liquid phase of the suspension comprising water and alcohol in proportions about two parts by weight alcohol to three parts by weight water, applying the suspension to the rear surface of the paper, and drying the coating.

' SALOMON NEUMANN.

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

UNITED STATES PATENTS Number Name 7 Date 1,733,524 Bradner Oct. 29, 1929 2,212,557 Bauer Aug. 27, 1940 2,235,676 Gardner 'Mar. 18, 1941 2,325,118 Bauer et al Aug. 10, 1943 Harris Dec. 26, 1944

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1733524 *Nov 8, 1926Oct 29, 1929Champion Coated Paper CompanyCoating paper
US2212557 *Aug 17, 1936Aug 27, 1940Stein Hall Mfg CoComposition adapted for use as an adhesive
US2235676 *Sep 22, 1939Mar 18, 1941Stein Hall Mfg CoOffset preventing material
US2326118 *Oct 4, 1940Aug 10, 1943Stein Hall Mfg CoPregummed hanging material
US2365873 *May 17, 1941Dec 26, 1944John J HarrisAdhesive and method of making the same
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2793966 *Jan 11, 1954May 28, 1957Nashua CorpNon-curling gummed paper, method and composition for making same
US2978343 *Oct 9, 1958Apr 4, 1961Nat Starch Chem CorpRemoistenable adhesive compositions
US2992129 *Mar 25, 1957Jul 11, 1961Ludlow CorpGummed product printed with conditioner
US3205091 *Apr 25, 1962Sep 7, 1965Nat Starch Chem CorpProcess for making remoistenable gummed surfaces
US3257225 *Dec 5, 1961Jun 21, 1966Nat Starch Chem CorpMethod of making a remoistenable adhesive product
US3279511 *Aug 28, 1962Oct 18, 1966Reynolds Metals CoFlexible packaging system
US3393925 *Jan 29, 1964Jul 23, 1968Bertram CalvertPaper products and method of producing same
US3950593 *Mar 26, 1973Apr 13, 1976A. E. Staley Manufacturing CompanyPregummed remoistenable tape having long open time and short tack time
US4113900 *Feb 17, 1977Sep 12, 1978Lawton William RCurl-resistant adhesive-coated paper
US4844972 *Dec 23, 1987Jul 4, 1989Borden, Inc.Woven-backed vinyl decorative-coverings with starchy-PVA prepaste adhesive
DE4432902C1 *Sep 15, 1994Apr 18, 1996Drescher GeschaeftsdruckePaper prod. useful for bonding immediately after laser printing
Classifications
U.S. Classification427/207.1, 427/395, 106/215.1, 106/205.7
International ClassificationC09J7/04
Cooperative ClassificationC09J7/042
European ClassificationC09J7/04B2