US4162180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Producing embossed wall- or ceiling-covering of cellulosic pulp and two different discrete thermoplastic materials
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1977-03-14
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Granted: 1979-07-24
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Expires: 1997-03-14
Abstract
Abstract A method of producing a wall or ceiling covering that is dry-stripable from the wall, is flexible and has good opacity, and will fully retain an embossed pattern even when the sheet is soaked with a water based adhesive. A sheet is provided containing 10 to 90% by weight of cellulose pulp fibres and 10 to 90% by weight of discontinuous fibres of two different synthetic thermoplastic polymeric materials. Staple fibres may also be added. The sheet is then heated to a temperature intermediate the temperature of plasticity of the two different thermoplastic materials so that the fibres of one of the thermoplastic materials are rendered plastic and fused together, the other thermoplastic material retaining its fibre structure.
Inventors
- 👤 Arthur Burton
- 👤 Roy Conway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:05
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/1272; D21H5/129; D21H27/00; D21H27/18; D21H27/20; D21H13/00; D21H13/02; D21H13/08; D21H13/10; D21H13/12; D21H13/14; D21H17/00; D21H17/63; D21H17/67; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2905; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
107 words
A method of producing an embossed wall- or ceiling- covering comprising the steps of: providing a sheet containing from 10 to 90% by weight of cellulosic pulp fibres and from 10 to 90% by weight of discontinuous fibres of two different discrete synthetic thermoplastic polymeric materials, the fibres of the two different materials being independent, heating the sheet to a temperature intermediate the temperatures of plasticity of the two different thermoplastic materials so that the fibres of one of the thermoplastic materials are rendered plastic and fuse together, the other thermoplastic material retaining its fibrous structure, and embossing the sheet while still hot from said heating step.
Claim 2
Independent Claim
107 words
A method of producing an embossed wall- or ceiling- covering comprising the steps of: providing a sheet containing from 10 to 90% by weight of cellulosic pulp fibres and from 10 to 90% by weight of discontinuous fibres of two different discrete synthetic thermoplastic polymeric materials, the fibres of the two different materials being independent, heating the sheet to a temperature intermediate the temperatures of plasticity of the two different thermoplastic materials so that the fibres of one of the thermoplastic materials are rendered plastic and fuse together, the other thermoplastic material retaining its fibrous structure, and embossing the sheet while still hot from said heating step.
Claim 3
Dependent Claim
41 words
A method as claimed in claim 1 in which the sheet which is provided contains from 20 to 40% by weight of cellulose fibres and from 60 to 80% by weight of discontinuous fibres of the two synthetic thermoplastic polymeric materials.
Claim 4
Dependent Claim
30 words
A method as recited in claim 1 in which one synthetic polymeric material is in the form of discontinuous fibres of polypropylene, and the other synthetic polymeric material is polyethylene.
Claim 5
Dependent Claim
19 words
A method as recited in claim 1 wherein the sheet contains, as a further constituent thereof, a staple fibre.
References Cited (Backward Citations)
US2464301A
Cited
US3595731A
Cited
US3562043A
Cited
US3671615A
Cited
DE2226330C3
Cited
US3956541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-23 | 1983-01-22 | 1983-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-23 | 1987-01-22 | 1987-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-23 | 1991-01-22 | 1991-07-24 | $7700.00 | Window Closed / Lapsed |