Patent US3906131A successfully refreshed from Google Patents.
US3906131A
Expired / Lapsed
US
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Chamois leather-like material having improved water absorbency and abrasion resistance
Assignee: Carl Freudenberg KG
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Filing: 1973-05-30
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Granted: 1975-09-16
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Expires: 1993-05-30
Abstract
Abstract A synthetic chamois leather-like material comprising a non-woven textile fabric whose fibers within the interior thereof are bonded together at crossing points thereof, said synthetic chamois leather-like material having on both major surfaces thereof discontinuous particles of a coagulated material, said said synthetic chamois leather-like material capable of absorbing an amount of water according to U.S. Army KK-C-300 C test equivalent to at least 180% of its own weight; a process for preparing a synthetic chamois leather-like material wherein a non-woven fabric is treated with a binder to join fibers within the interior thereof together at their crossing points, the process characterized by an improvement for increasing pill resistance and water absorption of the resultant synthetic chamois leather-like material, which improvement comprises thereafter applying to both major surfaces of said non-woven fabric a coagulatable latex and effecting coagulation thereof on said surfaces while concentrating the so-formed coagulated discontinuous particles so that no such particles are formed within an inner 60% thickness region of said fabric, said inner thickness region defined as the region which commences inwardly from the outer surface of said fabric a distance which equals 20% of the total thickness of said fabric and terminates from the opposite side thereof a distance equal to 20% of the total thickness of said fabric.
Inventors
- 👤 Hans Boe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:07
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24438; Y10T442/00; Y10T442/20; Y10T442/2033; Y10T442/2484; Y10T442/273
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
126 words
A SYNTHETIC CHAMOIS LEATHER-LIKE MATERIAL HAVING AN EXCELLENT ABRASION AND PILLING RESISTANCE AND GOOD WATER RETENTION CAPACITY WHICH SYNTHETIC CHAMOIS LEATHER -LIKE MATERIAL CONSISTS ESSENTIALLY OF A NON-WOVEN TEXTILE FABRIC HAVING LAMELLA BONDED ADJACENT FIBERS IN THE INTERSTICES THEREOF COAGULATED POROUS ABSORBENT DISCONTINUOUS RUBBER PARTICLES ON BOTH MAJOR SURFACES THEREOF SAID MATERIAL HAVING A SURFACE WHICH IS SUBSTANTIALLY FREE OF FIBERS SAID MATERIAL HAVING AN INNER REGION WHICH IS SUBSTANTIALLY FREE OF SAID COAGULATED POROUS DISCONTINUOUS RUBBER PARTICLES SAID POROUS COAGULATED DISCONTINUOUS RUBBER PARTICLES IN THE FORM OF BEADS POSITIONED AT OR ABOUT ONE OR MORE SURFACE FIBER ENDS SAID SYNTHETIC CHAMOIS LEATHER-LIKE MATERIAL CAPABLE OF ABSORBING AN AMOUNT OF WATER ACCORDING OF U.S ARMY KK-C300C TEST EQUIVALENT TO AT LEAST 180% OF ITS OWN WEIGHT.
Claim 2
Dependent Claim
126 words
A SYNTHETIC CHAMOIS LEATHER-LIKE MATERIAL HAVING AN EXCELLENT ABRASION AND PILLING RESISTANCE AND GOOD WATER RETENTION CAPACITY WHICH SYNTHETIC CHAMOIS LEATHER -LIKE MATERIAL CONSISTS ESSENTIALLY OF A NON-WOVEN TEXTILE FABRIC HAVING LAMELLA BONDED ADJACENT FIBERS IN THE INTERSTICES THEREOF COAGULATED POROUS ABSORBENT DISCONTINUOUS RUBBER PARTICLES ON BOTH MAJOR SURFACES THEREOF SAID MATERIAL HAVING A SURFACE WHICH IS SUBSTANTIALLY FREE OF FIBERS SAID MATERIAL HAVING AN INNER REGION WHICH IS SUBSTANTIALLY FREE OF SAID COAGULATED POROUS DISCONTINUOUS RUBBER PARTICLES SAID POROUS COAGULATED DISCONTINUOUS RUBBER PARTICLES IN THE FORM OF BEADS POSITIONED AT OR ABOUT ONE OR MORE SURFACE FIBER ENDS SAID SYNTHETIC CHAMOIS LEATHER-LIKE MATERIAL CAPABLE OF ABSORBING AN AMOUNT OF WATER ACCORDING OF U.S ARMY KK-C300C TEST EQUIVALENT TO AT LEAST 180% OF ITS OWN WEIGHT.
Claim 3
Dependent Claim
37 words
A synethetic chamois leather-like material according to claim 1 wherein said synthetic chamois leather-like material is capable of absorbing an amount of water according to said army test equivalent to at least 250% of its own weight.
Claim 4
Dependent Claim
32 words
A synthetic chamois leather-like material according to claim 1 wherein said material is capable of absorbing at least 400 grams per square meter of water determined at 25*C and at atmospheric pressure.
Claim 5
Dependent Claim
35 words
A synthetic chamois leather-like material according to claim 3 wherein said synthetic chamois leather-like material is capable of absorbing at least 600 grams per square meter of water determined at 25*C and at atmospheric pressure.
Claim 6
Dependent Claim
32 words
A synthetic chamois leather-like material according to claim 4 wherein said material is capable of absorbing at least 800 grams of water per square meter determined at 25*C and at atmospheric pressure.
Claim 7
Dependent Claim
78 words
A synthetic chamois leather-like material according to claim 1 wherein said material is free of discontinuous particles of coagulated material within an inner 60% thickness region of said fabric, said inner thickness region defined as the region which commences inwardly from the outer surface of said fabric a distance which equals 20% of the total thickness of said fabric and terminates from the opposite side thereof a distance equal to 20% of the total thickness of said fabric.
Claim 8
Dependent Claim
49 words
A synethetic chamois leather-like material according to claim 1 wherein said material shows no pilling after having been machine washed at 60*C for 30 minutes in the presence of a rough fleece material to effect friction on the surface of the synthetic chamois like material during the washing process.
Claim 9
Dependent Claim
185 words
IN A PROCESS FOR PREPARING A REPEATEDLY WATER-ABSORBABLE AND ABRASION RESISTANT SYNTHETIC CHAMOIS LEATHER-LIKE MATERIAL WHICH PROCESS COMPRISES FORMING A FLEECE WITH AN AT LEAST PARTIALLY DRYABLE LIQUID FORM BONDING AGENT COMPOSITION FOR THE FIBERS THEREOF AT LEAST PARTIALLY DRYING THE IMPREGNATED FLEECE, WHEREBY DEPOSITING SAID BONDING AGENT IN THE INTERSTICES OF SAID FLEECE JOINING INTERSECTING FIBERS WITH LAMELLA AND SETTING UP SAID BONDING AGENT TO AN EXTENT SUFFICIENT TO SUBSTANTIALLY MAINTAIN THE DIMENSIONAL INTEGRITY OF SAID FLEECE THE IMPROVEMENT FOR INCREASING PILL RESISTANCE AND WATER ADSORPTION OF THE RESULTANT SYNTHETIC CHAMOIS LEATHER-LIKE MATERIAL WHICH COMPRISES THEREAFTER APPLYING TO BOTH MAJOR SURFACES OF SAID NON-WOVEN FABRIC A COAGULATABLE LATEX AND EFFECTING COAGULATION THEREOF ON SAID SURFACE WHILE CONCENTRATING THE SOFORMED COAGULATED DISCONTINUOUS PARTICLES SO THAT NO SUCH PARTICLES ARE FORMED WITHIN AN INNER 60% THICKNESS REGION SAID INNER THICKNESS REGION DEFINED AS THE REGION WHICH COMMENCES INWARDLY FROM THE OUTER SURFACE OF SAID FABRIC A DISTANCE WHICH EQUAL 20% OF THE TOTAL THICKNESS OF SAID FABRIC AND TERMINATES FROM THE OPPOSITE SIDE THEREOF A DISTANCE EQUAL TO 20% OF THE TOTAL THICKNESS OF SAID FABRIC.
Claim 10
Dependent Claim
185 words
IN A PROCESS FOR PREPARING A REPEATEDLY WATER-ABSORBABLE AND ABRASION RESISTANT SYNTHETIC CHAMOIS LEATHER-LIKE MATERIAL WHICH PROCESS COMPRISES FORMING A FLEECE WITH AN AT LEAST PARTIALLY DRYABLE LIQUID FORM BONDING AGENT COMPOSITION FOR THE FIBERS THEREOF AT LEAST PARTIALLY DRYING THE IMPREGNATED FLEECE, WHEREBY DEPOSITING SAID BONDING AGENT IN THE INTERSTICES OF SAID FLEECE JOINING INTERSECTING FIBERS WITH LAMELLA AND SETTING UP SAID BONDING AGENT TO AN EXTENT SUFFICIENT TO SUBSTANTIALLY MAINTAIN THE DIMENSIONAL INTEGRITY OF SAID FLEECE THE IMPROVEMENT FOR INCREASING PILL RESISTANCE AND WATER ADSORPTION OF THE RESULTANT SYNTHETIC CHAMOIS LEATHER-LIKE MATERIAL WHICH COMPRISES THEREAFTER APPLYING TO BOTH MAJOR SURFACES OF SAID NON-WOVEN FABRIC A COAGULATABLE LATEX AND EFFECTING COAGULATION THEREOF ON SAID SURFACE WHILE CONCENTRATING THE SOFORMED COAGULATED DISCONTINUOUS PARTICLES SO THAT NO SUCH PARTICLES ARE FORMED WITHIN AN INNER 60% THICKNESS REGION SAID INNER THICKNESS REGION DEFINED AS THE REGION WHICH COMMENCES INWARDLY FROM THE OUTER SURFACE OF SAID FABRIC A DISTANCE WHICH EQUAL 20% OF THE TOTAL THICKNESS OF SAID FABRIC AND TERMINATES FROM THE OPPOSITE SIDE THEREOF A DISTANCE EQUAL TO 20% OF THE TOTAL THICKNESS OF SAID FABRIC.
Claim 11
Dependent Claim
38 words
A process according to claim 8 wherein coagulation is effected by heating the coagulatable latex at a temperature between 40* and 80*C within 1/2 minute after coagulatable latex has been applied to the surfaces of the textile fabric.
Claim 12
Dependent Claim
16 words
A process according to claim 8 wherein the coagulatable laatex contains between 30 and 50%-wt. solids.
Claim 13
Dependent Claim
37 words
A process according to claim 8 wherein the amount of coagulatable latex employed is such as to apply to each major surface of the finished fabric between 25 and 75 grams per square meter of coagulated latex.
Claim 14
Dependent Claim
36 words
A process according to claim 11 wherein the amount Of coagulatable latex applied to each major surface of the fabric is such that between 30 and 70 grams per square meter of coagulated latex remain thereon.
Claim 15
Dependent Claim
100 words
A process according to claim 8 wherein the latex comprises an aqueous 40% solids solution in the form of a foam-like, heat-sensitive natural or synthetic rubber dispersion containing 100 parts by weight solid ruber, 2 parts of an alkylaryl sulfonate comprising tetrapropylene benzene sulfonate as a foaming agent, 1.5 parts by weight casein as a stabilizer, 3 parts by weight polyvinylmethyl ether as a heat-sensitizing agent and 10 parts zinc oxide, 1 part sulfur, 3 parts zinc salt of mercaptobenzothiazole and 1 part mercaptobenzimidazole, said zinc oxide sulfur and zinc salts of mercaptobenzothiazole and mercapatobenzimidazole being employed as vulcanizing agents.
Claim 16
Dependent Claim
26 words
A process according to claim 8 wherein the coagulatable latex comprises an aqueous 40% solids, heat-sensitive dispersion of a copolymer of 62 : 38 butadiene :acrylonitrile.
Claim 17
Dependent Claim
31 words
A process according to claim 8 wherein the coagulatable latex comprises an aqueous 40% solids solution of a heat-sensitive rubber dispersion containing a copolymer of 75 : 25 butadiene : styrene.
References Cited (Backward Citations)
US1989717A
Cited
US2056406A
Cited
US2032942A
Cited
US2229061A
Cited
US2075945A
Cited
US2719806A
Cited
US2719795A
Cited
US2774687A
Cited
US3592685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |