US3709752A
Expired / Lapsed
US
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Method of making suede-like plastic
Assignee: UNITED STATES TRUST COMPANY A MASSACHUSETTS TRUST Co
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Filing: 1971-01-20
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Granted: 1973-01-09
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Expires: 1991-01-20
Abstract
Abstract A suede-like plastic material is prepared from a fabric coated with a cellular vinyl chloride resin. The surface of the resin material is characterized by an undulating or irregular surface which is generally uniformly composed of tensile ruptured cells giving the surface a suede-like appearance approaching that of natural suede leather. The suede material is prepared by the bonding together of surfaces of two resin layers of differing relative tensiles, at least one layer being gelled blowable vinyl chloride resin, which are subsequently heated to form a cellular laminate. The laminate is then delaminated by stripping the layers apart along the bonding plane between the surface, the stripping occurring by the tensile discontinuity of the original bonding or lamination process thereby imparting a natural suedelike material to at least one delaminated surface of the resin layers. The suede-like surface can also be prepared by forming a temperature gradient across a section of the foam and rupturing the cells.
Inventors
- 👤 R Wistozky
- 👤 R Petersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:17
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/065; B29; B29C; B29C44/00; B29C44/34; B29C44/56; B29C44/5627; B29C44/5654; B29C67/00; B29C67/20; B32B5/00; B32B5/22; B32B5/24; B32B5/245; B32B5/32; D; D06; D06N; D06N3/00; D06N3/007; D06N3/0072; D06N3/04; D06N3/06; B32B2451/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1059; Y10T156/11; Y10T156/1168; Y10T156/1174; Y10T156/1179; Y10T156/1184; Y10T428/00; Y10T428/23907; Y10T428/23943; Y10T428/23986; Y10T428/24; Y10T428/24355; Y10T428/24438; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249988; Y10T428/249991; Y10T428/249992
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
17 words
The method of claim 1 wherein a temperature gradient is maintained across the sandwich laminate during delamination.
Claim 2
Dependent Claim
15 words
The method of claim 1 wherein the second laminate comprises a cellular thermoplastic resin layer.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein the thermoplastic resins of the first and second laminate layers are of similar chemical composition but vary in molEcular weight.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein the thermoplastic resin of the first and second laminates is a vinyl chloride resin.
Claim 5
Dependent Claim
46 words
The method of claim 1 wherein the ratio of the thickness of the first thermoplastic resin layer to the second thermoplastic resin layer varies from about 10 to 1 to 1 to 10 and wherein the temperature of delamination ranges from about 250* to 450* F.
Claim 6
Independent Claim
154 words
A method of preparing a sheet material having a suede-like surface appearance which method comprises: a. bonding together the thermoplastic resin surfaces of a first and second laminate to form a sandwich laminate, each laminate comprising a sheet material having a thermoplastic resin layer bonded thereto, the layer of the first laminate comprising a vinyl chloride resin and a blowing agent; b. heating the sandwich laminate to a temperature sufficient to create a first cellular foam layer; and c. delaminating the first laminate from the second laminate by stripping the laminates apart along the surface plane between the bonding surface of the cellular layer of the first laminate and the thermoplastic resin surface of the second laminate, the temperature of stripping selected to provide a plane of tensile discontinuity between the first and second laminates, thereby providing a first and second laminate, one of which has a cellular layer of a suede-like surface appearance.
Claim 7
Dependent Claim
37 words
The method of claim 7 wherein the second laminate also comprises a vinyl chloride resin layer and a blowing agent and wherein the sandwich laminate is heated to a temperature sufficient to create a two-layer cellular structure.
Claim 8
Dependent Claim
30 words
The method of claim 8 wherein the vinyl chloride resins in the first and second laminate are compounded to provide a difference in hot strength at the temperature of stripping.
Claim 9
Dependent Claim
17 words
The method of claim 7 wherein the temperature of stripping ranges from about 250* to 450* F.
Claim 10
Dependent Claim
36 words
The method of claim 7 wherein the thickness of the layer of the first laminate ranges from about 2 to 50 mils while the thickness of the second laminate ranges from about 1 to 10 mils.
Claim 11
Dependent Claim
16 words
The method of claim 7 wherein the second laminate comprises a noncellular vinyl chloride resin layer.
Claim 12
Dependent Claim
37 words
The method of claim 12 wherein the vinyl chloride resin in the first and second laminate are compounded to provide a difference in hot strength between the surfaces of the resin layers at the temperature of stripping.
Claim 13
Dependent Claim
17 words
The method of claim 7 which includes maintaining a temperature gradient across the laminate layers during delamination.
Claim 14
Dependent Claim
18 words
The method of claim 7 wherein the temperature of delamination ranges from about 275* F to 350* F.
Claim 15
Dependent Claim
23 words
The method of claim 7 wherein the ratio of the thickness of the first and second laminates ranges from about 10:1 to 1:10.
Claim 16
Dependent Claim
29 words
The method of claim 7 wherein the sheet material of the first laminate comprises a woven fabric and the sheet material of the second laminate comprises a paper sheet.
Claim 17
Dependent Claim
35 words
The method of claim 7 wherein the first and second laminates comprises a vinyl chloride resin and the laminates are bonded together by casting vinyl chloride resin plastisol layers, one on top of the other.
Claim 18
Dependent Claim
39 words
The method of claim 7 wherein the first and second laminates comprise a vinyl chloride resin and the laminates are bonded together by heating the surfaces of calendered vinyl chloride resin sheets and pressing the heated surfaces into contact.
Claim 19
Independent Claim
237 words
A method of preparing a sheet material having a natural suede-like surface appearance which method comprises: a. coating a thin coating of from about 1 to 10 mils of thickness of a vinyl chloride plastisol onto a first sheet material, said plastisol containing a small amount of a blowing agent; b. heating the first plastisol layer to a temperature sufficient to gel the vinyl chloride resin to a tack-free surface, but insufficient to decompose subStantially the blowing agent therein; c. casting a coating of from about 5 to 30 mils of a second plastisol onto the surface of the gelled first plastisol layer; d. heating the second plastisol layer to a temperature sufficient to gel the layer and to provide a tacky upper surface to the second vinyl chloride plastisol layer; e. bonding to the tacky surface of the second plastisol layer a second sheet material to form a sandwich laminate; f. heating the sandwich laminate so formed to a temperature sufficient to provide a first cellular foam layer; and g. delaminating the sandwich laminate by stripping the first cellular layer from the second layer, the stripping occurring along the bonding plane between the bonding surface of the first and second layers, the temperature of stripping selected to provide a plane of tensile discontinuity between the respective layers thereby providing a first and second laminate, one of which has a cellular layer of a suede-like surface appearance.
Claim 20
Independent Claim
110 words
A method of preparing a sheet material having a suede-like surface appearance, which method comprises: providing a laminate structure having two outer sheet materials, one of which is a paper sheet and the other is a woven sheet, and at least one inner cellular foam thermoplastic resin layer; establishing a temperature gradient providing a random irregular surface plane of tensile discontinuity in the cellular layer; and stripping the two sheet materials apart along said plane to tensile rupture the inner cellular layer, the temperature of stripping ranging from about 250* F to 450* F, thereby providing two sheet materials, each of which are characterized by an undulating suede-like surface appearance.
Claim 21
Dependent Claim
15 words
The method of claim 21 wherein the resin layers comprise plasticized vinyl chloride resin layers.
Claim 22
Dependent Claim
18 words
The method of claim 21 wherein the temperature of stripping ranges from about 275* F to 350* F.
Claim 23
Dependent Claim
130 words
The method of claim 21 which includes preparing the laminate structure by the steps of: a. casting a first thin layer of a vinyl chloride resin plastisol onto the surface of the woven sheet material; b. heating the first layer to a temperature to gell the resin layer; c. casting a second thin layer of a vinyl chloride resin plastisol containing a blowing agent onto the gelled surface of the first layer; d. placing a paper sheet material onto the surface of the second layer; e. heating the first and second layers in an oven to fuse the resin layers and to form at least one cellular layer, thereby forming a laminate structure; and f. stripping the sheet materials apart on emergence of the laminate structure from the heating oven.
Claim 24
Independent Claim
122 words
A method of preparing a sheet material having a suede-like surface appearance, which method comprises: providing a laminate structure having two outer sheet materials and at least one inner cellular foam plastic resin layer, said laminate structure having a random irregular surface plane of tensile discontinuity in the cellular layer between and spaced from the two outer sheet materials of the laminate; and stripping the two sheet materials apart along said plane to tensile rupture the inner cellular layer while maintaining such tensile discontinuity to control the nature of the resulting suede surface, thereby providing two sheet materials, at least one of which is characterized by an undulating suede-like surface formed by tensile ruptured ragged-edged, irregularly-shaped open cells of said cellular layer.
Claim 25
Dependent Claim
17 words
The method of claim 25 wherein the cellular resin layer is a plasticized vinyl chloride resin layer.
Claim 26
Dependent Claim
20 words
The method of claim 25 wherein said tensile discontinuity is provided by establishing a tensile gradient between two inner layers.
Claim 27
Dependent Claim
32 words
The method of claim 25 wherein each of said two sheet materials is characterized by an undulating suede-like surface formed by tensile ruptured raggeD-edged, irregularly-shaped open cells of said cellular foam layer.
Claim 28
Dependent Claim
20 words
The method of claim 25 wherein said tensile discontinuity is provided by establishing a temperature gradient in the cellular layer.
Claim 29
Dependent Claim
24 words
The method of claim 29 which includes stripping the two sheet materials apart at a temperature of from about 250* F to 450* F.
References Cited (Backward Citations)
US3123508A
Cited
US3041193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |