US4176210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making urethane coated decorative sheet-type covering material
Assignee: GAF Corp
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Filing: 1977-04-12
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Granted: 1979-11-27
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Expires: 1997-04-12
Abstract
Abstract Decorative sheet-type covering material having both PVC and polyurethane wear layers is made by first forming a sheet of gelled foamable PVC plastisol or organosol on a substrate. A layer of nonfoamable PVC plastisol or organosol is then applied to the gelled foamable layer and gelled, but not cured. A layer of polyurethane is then applied to the gelled nonfoamable layer and the entire sheet is heated to a temperature sufficient to decompose the blowing agent in the foamable layer and cure both of the PVC layers and the polyurethane layer.
Inventors
- 👤 David B. Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:04
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; B32B5/20; B32B5/22; B32B5/24; B32B5/245; B44; B44C; B44C3/00; B44C3/04; B44C3/044; D; D06; D06N; D06N3/00; D06N3/04; D06N3/06; D06N3/08; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0235; B32B2266/0278; B32B2309/00; B32B2309/02; B32B2471/00; B32B2607/00; B32B2607/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/24504; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249991; Y10T428/249992
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
Process for making decorative sheet-type covering material comprising the steps of: (a) forming sheet material comprising a layer of gelled foamable PVC plastisol or organosol on a substrate, said layer containing a blowing agent; (b) applying a layer of nonfoamable PVC plastisol or organosol to said gelled foamable layer; (c) gelling said layer of nonfoamable PVC plastisol or organosol; (d) applying a layer of uncured polyurethane to the gelled layer of nonfoamable PVC plastisol or organosol; and (e) then heating said sheet material to a temperature sufficient to decompose said blowing agent and cure all of said PVC and polyurethane layers.
Claim 2
Dependent Claim
101 words
Process for making decorative sheet-type covering material comprising the steps of: (a) forming sheet material comprising a layer of gelled foamable PVC plastisol or organosol on a substrate, said layer containing a blowing agent; (b) applying a layer of nonfoamable PVC plastisol or organosol to said gelled foamable layer; (c) gelling said layer of nonfoamable PVC plastisol or organosol; (d) applying a layer of uncured polyurethane to the gelled layer of nonfoamable PVC plastisol or organosol; and (e) then heating said sheet material to a temperature sufficient to decompose said blowing agent and cure all of said PVC and polyurethane layers.
Claim 3
Dependent Claim
39 words
Process according to claim 1 wherein step (c) is carried out by heating the sheet material to a temperature of between about 250° F. and 400° F. for a time of about between ten seconds and about three minutes.
Claim 4
Dependent Claim
42 words
Process according to claim 1 wherein a printed layer, at least some portions of which contain a suppressant for the blowing agent contained in the foamable layer, is applied to the gelled foamable layer prior to application of the nonfoamable layer thereto.
Claim 5
Dependent Claim
61 words
Process according to claim 1 wherein the substrate comprises a layer of felt, the layer of foamable PVC plastisol or organosol is between about 2 and about 50 mils thick, the layer of nonfoamable PVC plastisol or organosol is between about 1 and about 50 mils thick, and the cured polyurethane layer is between about 0.5 and about 5 mils thick.
Claim 6
Dependent Claim
87 words
Process according to claim 4 wherein the heating of the sheet material is carried out by first subjecting the material to a temperature between about 250° F. and about 310° F., such temperature being below the decomposition temperature of the blowing agent, for a time between about one and three minutes and then subjecting such material to a temperature between about 320° F. and 450° F., such temperature being above the decomposition temperature of the blowing agent, for a time between about one and about three minutes.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |