US2548971A - Process for production of stencil tissue - Google Patents
Process for production of stencil tissue Download PDFInfo
- Publication number
- US2548971A US2548971A US709424A US70942446A US2548971A US 2548971 A US2548971 A US 2548971A US 709424 A US709424 A US 709424A US 70942446 A US70942446 A US 70942446A US 2548971 A US2548971 A US 2548971A
- Authority
- US
- United States
- Prior art keywords
- cellulose
- web
- fibres
- cellulose acetate
- staple
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 229920002301 cellulose acetate Polymers 0.000 claims description 16
- 239000004744 fabric Substances 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 239000004627 regenerated cellulose Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical class C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 claims description 2
- 239000004902 Softening Agent Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- XLYOFNOQVPJJNP-PWCQTSIFSA-N Tritiated water Chemical compound [3H]O[3H] XLYOFNOQVPJJNP-PWCQTSIFSA-N 0.000 claims 1
- 229920002678 cellulose Polymers 0.000 description 17
- 239000001913 cellulose Substances 0.000 description 15
- 229940081735 acetylcellulose Drugs 0.000 description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 238000003825 pressing Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 238000009960 carding Methods 0.000 description 4
- 229920003043 Cellulose fiber Polymers 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- 230000001464 adherent effect Effects 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 2
- ZAMLGGRVTAXBHI-UHFFFAOYSA-N 3-(4-bromophenyl)-3-[(2-methylpropan-2-yl)oxycarbonylamino]propanoic acid Chemical compound CC(C)(C)OC(=O)NC(CC(O)=O)C1=CC=C(Br)C=C1 ZAMLGGRVTAXBHI-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- DQEFEBPAPFSJLV-UHFFFAOYSA-N Cellulose propionate Chemical compound CCC(=O)OCC1OC(OC(=O)CC)C(OC(=O)CC)C(OC(=O)CC)C1OC1C(OC(=O)CC)C(OC(=O)CC)C(OC(=O)CC)C(COC(=O)CC)O1 DQEFEBPAPFSJLV-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- IIOPVJIGEATDBS-UHFFFAOYSA-N acetic acid;dodecanoic acid Chemical compound CC(O)=O.CCCCCCCCCCCC(O)=O IIOPVJIGEATDBS-UHFFFAOYSA-N 0.000 description 1
- YQAHABBBFVAGBK-UHFFFAOYSA-N acetic acid;hexadecanoic acid Chemical compound CC(O)=O.CCCCCCCCCCCCCCCC(O)=O YQAHABBBFVAGBK-UHFFFAOYSA-N 0.000 description 1
- SPTSIOTYTJZTOG-UHFFFAOYSA-N acetic acid;octadecanoic acid Chemical compound CC(O)=O.CCCCCCCCCCCCCCCCCC(O)=O SPTSIOTYTJZTOG-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 150000001733 carboxylic acid esters Chemical class 0.000 description 1
- 229920006218 cellulose propionate Polymers 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000578 dry spinning Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- -1 methylene ethylene ether Chemical compound 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000002166 wet spinning Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- 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
- D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/425—Cellulose series
- D04H1/4258—Regenerated cellulose series
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/24—Stencils; Stencil materials; Carriers therefor
- B41N1/243—Stencils; Stencil materials; Carriers therefor characterised by the ink pervious sheet, e.g. yoshino paper
-
- 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
Definitions
- This invention relates to fibrous materials and .in particular to sheet materials suitable for use as duplicating-stencil tissue.
- Duplicating-stencil tissue is normally made from the fibres of Japanese mulberr bark, by a process in which the fibres are deposited from ,an aqueoussuspension on to a mesh to form a web. It is the principal object of the present invention to provide a duplicating-stencil tissue from materials which are freely available in this country. 1
- a suitable sheet material can be provided in the form of a web of. regenerated cellulose staple fibres in admixture with adherent staple fibres of a thermoplastic derivative of cellulose.
- the staple fibres are preferably all of the same denier and staple length, and the best results have been obtained by mixing the two kinds of staple fibre dry on a carding machine and collecting the resulting web off the doifin cylinder of the carding machine on to a rough surfaced paper.
- the web obtained in this way may be folded in two to give a heavier and more even web.
- Naturally the proportion of cellulose derivative fibres in the mixture must be sufficient to bond the web into a'coherent sheet.
- the best results have been obtained using equal proportions of the two kinds of fibre.
- the invention may be illustrated as follows:
- Theresulting web is collected 01f the dofiing cylinder on to a rough surfaced paper, folded in two, and sandwiched between two layers of a woven fabric of .high tenactrial alcohol and 75 parts of water, the parts bein by volume, and then pressed between two layers of cotton fabric each backed by two layers of woolen fabric, in a steam heated platen press, for 3 minutes at C. under a pressure of 40 to 50 pounds per square inch.
- a web is formed in which the cellulose acetate fibres are bonded together but which can readily be peeled off from the enveloping fabric.
- the web weighs about 0.9? ounce per square yard and is approximately 0.07 mm. in thickness. It is even in thickness, has a smooth surface free from fluffiness and is suitable for use as a duplicatingstencil tissue.
- the denier and staple length of the fibres used may be varied within certain limits. Thus, fibres of denier less than 3 for example fibres of denier 2, 1, or even less than 1, can be employed.
- the denier can be somewhat higher than 3 /2, e. g. 4, but should not be substantially higher than about 5.
- the staple length may range from about 1 inch or even less to about 2 inches.
- the regenerated cellulose :fibres have been described as made by the viscose process.
- Regenerated cellulose fibres made by other methods may, however, be employed.
- the fibres may be made .by the cuprammonium method or by the saponification of cellulose ester fibre, especially high tenacity cellulose ester fibre obtained as the result of stretching dry-spun cellulose acetate fibre, preferably in the form of yarns of continuous filaments, to a considerable degree, for example to 5 to times its-original length-in steam or hot water.
- thermoplastic derivatives of cellulose (Instead of cellulose acetat fibres, staple fibres of other thermoplastic derivatives of cellulose maybe used. Examples of such derivatives are other carboxylic acid esters of cellulose such as cellulose propionate, cellulose ibutyrate, cellulose acetate stearate, cellulose acetate palmitate, and cellulose acetate laurate; and others of cellulose .such as ethyl cellulose, propyl cellulose, and
- the staple fibres may be obtained by cutting a multi-filament yarn obtained :by a dry-spinning operation from a solution of the cellulose derivative; or by stretching such a dry-spun multi-filament yarn in steam or hot water to produce a high tenacity yarn, and cutting this intostaple fibres; or by cutting into staple fibres a multi-filamem yarn of the derivative of cellulose, formed by a wet-spinning operation.
- Th invention includes the provision of sheet materials of the structure referred to above for purposes other than for use as duplicator-stenoil tissue, .e. g. for use in electrical insulation and :in protecting highly polished surfaces against scratching.
- Process for the production of a sheet material which is suitable for use as a duplicating stencil tissue which comprises forming a web of a weight of at most 1 oz. per square yard of a mixture of regenerated cellulose staple fibers and cellulose acetate staple fibers, moistening said web with a softening agent selected from the group consisting of a 20-30% aqueous solution of a saturated aliphatic alcohol of from 1 to 3 carbon atoms, acetone diluted with 8 to 9 times its volume of water and dioxane diluted with 8 to 9 times .its volume of water, and pressing said moistened web at a temperature of 120-150 C. between layers of fabric whereby the cellulose acetate fibers are bonded one to another Without being stuck to the fabric layer.
- a softening agent selected from the group consisting of a 20-30% aqueous solution of a saturated aliphatic alcohol of from 1 to 3 carbon atoms, acetone diluted with 8 to 9 times its volume of water and di
- Process for the production of sheet material which is suitable for use as a duplicating stencil tissue which comprises forming a web of a weight at most 1 oz. per square yard of a mixture of regenerated cellulcse staple fibres and cellulose acetate staple fibres, moistening said Web with a 20-30% aqueous solution of a saturated aliphatic alcohol-of 1 to 3 carbon atoms and pressing said moistened web at a temperature of l20-150 C.
- Process for the production of sheet material which is suitable for use as duplicating stencil tissue which comprises carding a mixture of regenerated cellulose staple fibres and cellulose acetate staple fibres into a Web of a weight at most 1 oz. per square yard, moistening said web with aqueous ethyl alcohol of 20-30% strength and pressing said web at a temperature of 120-150 C. between layers of fabricwherebythe cellulose acetate fibres are bonded one to another without being stuck to the fabric layer.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Laminated Bodies (AREA)
Description
Patented Apr. 17, 1951 PROCESS FOR PRODUCTION OF STENCIL TISSUE I of Delaware.
No Drawing. Application November 13, 1946, Se-
rial No. 709,424. 22, 1945 3 Claims.
I This invention relates to fibrous materials and .in particular to sheet materials suitable for use as duplicating-stencil tissue.
In Great Britain November Duplicating-stencil tissue is normally made from the fibres of Japanese mulberr bark, by a process in which the fibres are deposited from ,an aqueoussuspension on to a mesh to form a web. It is the principal object of the present invention to provide a duplicating-stencil tissue from materials which are freely available in this country. 1
Attempts to formsuitable sheet materials from regenerated cellulose staple fibres were unsuccessful owing to the difliculty of obtaining the desired degree of cohesion in the sheet material formed. Various methods of increasing the cohesion, for example by employing cellulose derivative adhesives such as methyl cellulose, and cellulose solvents such as complex compounds of copper with organic bases, also proved unsuccessful.
We have now found that a suitable sheet material can be provided in the form of a web of. regenerated cellulose staple fibres in admixture with adherent staple fibres of a thermoplastic derivative of cellulose.
The staple fibres are preferably all of the same denier and staple length, and the best results have been obtained by mixing the two kinds of staple fibre dry on a carding machine and collecting the resulting web off the doifin cylinder of the carding machine on to a rough surfaced paper. The web obtained in this way may be folded in two to give a heavier and more even web. Naturally the proportion of cellulose derivative fibres in the mixture must be sufficient to bond the web into a'coherent sheet. The best results have been obtained using equal proportions of the two kinds of fibre.
To render the cellulose derivative fibres adherent and convert the web into a coherent sheet,
it may be pressed between sheets of fabric at an ity regenerated cellulose.
- mersed in a solution containing 25 parts of indus- I webs obtained by pressing. in the presence of .water alone are apt to be uneven and fluffy. At-
tempts to obviate this difiiculty by incorporating a plasticiser with the cellulose derivative fibres were found to cause sticking of the web to the enveloping layers of fabric. This difiiculty of adhesion to the layersof fabric was also found when using, instead of water, an active solvent such as acetone, dioxane, or' methylene ethylene ether, diluted with up to about its own volume of water, or a potential solvent for cellulose ace tate, that isa liquid which becomes a solvent at elevated temperatures, for example methanol, ethanol or isopropanol, diluted with about 25%, by volume of Water. Satisfactory results, however, were obtainedby the use of very much more dilute solutions of an active solvent for'the cel for pressing will be between and 150 C.
The invention may be illustrated as follows:
Staple fibres of cellulose acetate of 3% denier and 1% inch staple length,.together with regenerated cellulose staple fibres produced by the viscose process and of the same denier and staple length, are fed in equal proportions by weight to a carding machine. Theresulting web is collected 01f the dofiing cylinder on to a rough surfaced paper, folded in two, and sandwiched between two layers of a woven fabric of .high tenactrial alcohol and 75 parts of water, the parts bein by volume, and then pressed between two layers of cotton fabric each backed by two layers of woolen fabric, in a steam heated platen press, for 3 minutes at C. under a pressure of 40 to 50 pounds per square inch. In this way a web is formed in which the cellulose acetate fibres are bonded together but which can readily be peeled off from the enveloping fabric. The web weighs about 0.9? ounce per square yard and is approximately 0.07 mm. in thickness. It is even in thickness, has a smooth surface free from fluffiness and is suitable for use as a duplicatingstencil tissue.
It is an advantage of the process of the invention that it does not involve subjection of: the staple fibres to severe mechanical action tending 2,548,971- UNITED STATES 'eAT NT OFFICE The assembly is imto'shorten the fibres, such as occurs in the production of pulps for paper-production. The avoidance of such mechanical action coupled with the adherence of the thermoplastic fibres, enables products of high strength to be obtained.
The denier and staple length of the fibres used may be varied within certain limits. Thus, fibres of denier less than 3 for example fibres of denier 2, 1, or even less than 1, can be employed. The denier can be somewhat higher than 3 /2, e. g. 4, but should not be substantially higher than about 5. The staple length may range from about 1 inch or even less to about 2 inches.
The regenerated cellulose :fibres have been described as made by the viscose process. Regenerated cellulose fibres made by other methods may, however, be employed. For instance the fibres may be made .by the cuprammonium method or by the saponification of cellulose ester fibre, especially high tenacity cellulose ester fibre obtained as the result of stretching dry-spun cellulose acetate fibre, preferably in the form of yarns of continuous filaments, to a considerable degree, for example to 5 to times its-original length-in steam or hot water.
cellulose fibre) or after spinning (as, for example,
in the steam-stretching of dry-spun cellulose acetate fibre), enable fibres to be produced of "high tenacity, e. g. 2 to 4 or 6 or more grams per denier, and of low denier, e. g. between 2 and 1 oreven less than 1. 'Very strong, thin tissues can be made when the regenerated cellulose fibres are made by such a process.
(Instead of cellulose acetat fibres, staple fibres of other thermoplastic derivatives of cellulose maybe used. Examples of such derivatives are other carboxylic acid esters of cellulose such as cellulose propionate, cellulose ibutyrate, cellulose acetate stearate, cellulose acetate palmitate, and cellulose acetate laurate; and others of cellulose .such as ethyl cellulose, propyl cellulose, and
benzyl cellulose. The staple fibres may be obtained by cutting a multi-filament yarn obtained :by a dry-spinning operation from a solution of the cellulose derivative; or by stretching such a dry-spun multi-filament yarn in steam or hot water to produce a high tenacity yarn, and cutting this intostaple fibres; or by cutting into staple fibres a multi-filamem yarn of the derivative of cellulose, formed by a wet-spinning operation.
Th invention includes the provision of sheet materials of the structure referred to above for purposes other than for use as duplicator-stenoil tissue, .e. g. for use in electrical insulation and :in protecting highly polished surfaces against scratching.
Having described our invention, what we desire to secure byLetter Patent is:
1. Process for the production of a sheet material which is suitable for use as a duplicating stencil tissue, which comprises forming a web of a weight of at most 1 oz. per square yard of a mixture of regenerated cellulose staple fibers and cellulose acetate staple fibers, moistening said web with a softening agent selected from the group consisting of a 20-30% aqueous solution of a saturated aliphatic alcohol of from 1 to 3 carbon atoms, acetone diluted with 8 to 9 times its volume of water and dioxane diluted with 8 to 9 times .its volume of water, and pressing said moistened web at a temperature of 120-150 C. between layers of fabric whereby the cellulose acetate fibers are bonded one to another Without being stuck to the fabric layer.
2. Process for the production of sheet material which is suitable for use as a duplicating stencil tissue, which comprises forming a web of a weight at most 1 oz. per square yard of a mixture of regenerated cellulcse staple fibres and cellulose acetate staple fibres, moistening said Web with a 20-30% aqueous solution of a saturated aliphatic alcohol-of 1 to 3 carbon atoms and pressing said moistened web at a temperature of l20-150 C.
between layers of fabric whereby the cellulose acetate fibres are bonded one to another without being stuck to the fabric layer.
3. Process for the production of sheet material which is suitable for use as duplicating stencil tissue, which comprises carding a mixture of regenerated cellulose staple fibres and cellulose acetate staple fibres into a Web of a weight at most 1 oz. per square yard, moistening said web with aqueous ethyl alcohol of 20-30% strength and pressing said web at a temperature of 120-150 C. between layers of fabricwherebythe cellulose acetate fibres are bonded one to another without being stuck to the fabric layer.
ERNEST LESLIE GREENYVOOD. FREDERICK WILLIAM HUGHES.
ALBERT WILLIAM MORIJEDGE-I-IADFIELD.
REFERENCES CITED The following references are of record in the file of this patent:
Claims (1)
1. PROCESS FOR THE PRODUCTION OF A SHEET MATERIAL WHICH IS SUITABLE FOR USE AS A DUPLICATING STENCIL TISSUE, WHICH COMPRISES FORMING A WEB OF A WEIGHT OF AT MOST 1 OZ. PER SPUARE YARD OF A MIXTURE OF REGENERATED CELLULOSE STAPLE FIBERS AND CELLULOSE ACETATE FIBERS, MOISTENING SAID WEB WITH A SOFTENING AGENT SELECTED FROM THE GROUP CONSISTING OF A 20-30% AQUEOUS SOLUTION OF A SATURATED ALIPHATIC ALCOHOL OF FROM 1 TO 3 CARBON ATOMS, ACETONE DILUTED WITH 8 TO 9 TIMES ITS VOLUME OF WATER AND DIOXANE DILUTED WITH 8 TO 9 TIMES ITS VOLUME OF WATER, AND PRESSING SAID MOISTENED WEB AT A TEMPERATURE OF 120-150* C. BETWEEN LAYERS OF FABRIC WHEREBY THE CELLULOSE ACETATE FIBERS ARE BONDED ONE TO ANOTHER WITHOUT BEING STUCK TO THE FABRIC LAYER.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB31503/45A GB604054A (en) | 1945-11-22 | 1945-11-22 | Improvements relating to fibrous sheet materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2548971A true US2548971A (en) | 1951-04-17 |
Family
ID=10324063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US709424A Expired - Lifetime US2548971A (en) | 1945-11-22 | 1946-11-13 | Process for production of stencil tissue |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2548971A (en) |
| GB (1) | GB604054A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2126822A (en) * | 1934-08-01 | 1938-08-16 | Celanese Corp | Fabric and method of making same |
| US2273965A (en) * | 1939-04-17 | 1942-02-24 | Celanese Corp | Method of making collars |
| US2277049A (en) * | 1939-11-06 | 1942-03-24 | Kendall & Co | Textile fabric and method of making same |
| US2277050A (en) * | 1940-08-31 | 1942-03-24 | Kendall & Co | Infuser |
| US2321108A (en) * | 1939-06-24 | 1943-06-08 | Celanese Corp | Manufacture of textile materials |
| US2358761A (en) * | 1940-08-03 | 1944-09-19 | Kendall & Co | Adhesive sheet materials |
| US2430868A (en) * | 1942-08-03 | 1947-11-18 | American Viscose Corp | Process for treating fibrous materials |
-
1945
- 1945-11-22 GB GB31503/45A patent/GB604054A/en not_active Expired
-
1946
- 1946-11-13 US US709424A patent/US2548971A/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2126822A (en) * | 1934-08-01 | 1938-08-16 | Celanese Corp | Fabric and method of making same |
| US2273965A (en) * | 1939-04-17 | 1942-02-24 | Celanese Corp | Method of making collars |
| US2321108A (en) * | 1939-06-24 | 1943-06-08 | Celanese Corp | Manufacture of textile materials |
| US2277049A (en) * | 1939-11-06 | 1942-03-24 | Kendall & Co | Textile fabric and method of making same |
| US2358761A (en) * | 1940-08-03 | 1944-09-19 | Kendall & Co | Adhesive sheet materials |
| US2277050A (en) * | 1940-08-31 | 1942-03-24 | Kendall & Co | Infuser |
| US2430868A (en) * | 1942-08-03 | 1947-11-18 | American Viscose Corp | Process for treating fibrous materials |
Also Published As
| Publication number | Publication date |
|---|---|
| GB604054A (en) | 1948-06-28 |
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