US4148955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Matt and scratch-resistant films and process for their manufacture
Assignee: Novartis AG
•
Filing: 1977-10-13
•
Granted: 1979-04-10
•
Expires: 1997-10-13
Abstract
Abstract Matt films having a scratch-resistant surface are obtained from moulding compositions reinforced with glass spheres if the extruded film is stretched while still in the melt-fluid state, and then allowed to cool. These films are suitable for use as coating materials, especially for furniture, doors and the like.
Inventors
- 👤 Franz Breitenfellner
- 👤 Roland Fink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 00:53
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/58; B29C70/64; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/20; B32B27/34; B32B27/36; C; C08; C08J; C08J5/00; C08J5/18; B29K; B29K2709/00; B29K2709/08; B29K2995/00; B29K2995/0018; B29K2995/0024; B29K2995/0037; B29K2995/0087; B29L; B29L2007/00; B29L2007/002; B32B2264/00; B32B2264/10; B32B2264/101; B32B2307/00; B32B2307/40; B32B2307/408; B32B2307/50; B32B2307/584; B32B2479/00; Y; Y10; Y10S; Y10S264/00; Y10S264/06; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24421; Y10T428/24479; Y10T428/25; Y10T428/251; Y10T428/252; Y10T428/259; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31786
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
116 words
A matted and scratch-resistant, amorphous to crystalline sheet or film of a film-forming thermoplastic and a filler in an amount of 2 to 25% by weight, based on the weight of polymer, said filler consisting of glass spheres of size from 0.5 to 75μ, uniformly distributed therein, said sheet or film having been extruded and taken up in an integrated two-step process whereby said sheet or film was stretched in the melt-fluid state at a decreasing temperature gradient between the temperature of the melt extrusion means and the temperature of the take-up means, and said sheet or film having a surface characterized by projecting domes of the glass spheres which are still completely covered by thermoplastic.
Claim 2
Dependent Claim
116 words
A matted and scratch-resistant, amorphous to crystalline sheet or film of a film-forming thermoplastic and a filler in an amount of 2 to 25% by weight, based on the weight of polymer, said filler consisting of glass spheres of size from 0.5 to 75μ, uniformly distributed therein, said sheet or film having been extruded and taken up in an integrated two-step process whereby said sheet or film was stretched in the melt-fluid state at a decreasing temperature gradient between the temperature of the melt extrusion means and the temperature of the take-up means, and said sheet or film having a surface characterized by projecting domes of the glass spheres which are still completely covered by thermoplastic.
Claim 3
Dependent Claim
23 words
A sheet or film according to claim 1, characterized in that the glass spheres are bonded to the thermoplastic by an adhesion promotor.
Claim 4
Dependent Claim
16 words
A sheet or film according to claim 1, in which the thermoplastic is a polyalkylene terephthalate.
Claim 5
Dependent Claim
16 words
A sheet or film according to claim 3, in which the thermoplastic is a polyethylene terephthalate.
Claim 6
Dependent Claim
15 words
A sheet or film according to claim 1, in which the thermoplastic is a polyamide.
Claim 7
Dependent Claim
22 words
A sheet or film according to claim 4, in which the thermoplastic is polyamide 6, polyamide 6,6, polyamide 11 or polyamide 12.
Claim 8
Dependent Claim
18 words
A sheet or film according to claim 1 which contains 5 to 15% by weight of glass spheres.
Claim 9
Dependent Claim
18 words
A sheet or film according to claim 1 which contains 5.5 to 12% by weight of glass spheres.
Claim 10
Dependent Claim
22 words
A sheet or film according to claim 1 characterized in that the glass spheres are of a size from 0.5 to 50μ.
Claim 11
Dependent Claim
22 words
A sheet or film according to claim 1 characterized in that the glass spheres have an average size of 0.5 to 20μ.
Claim 12
Dependent Claim
17 words
A sheet or film according to claim 1, characterized in that a further matting agent is present.
Claim 13
Dependent Claim
24 words
A sheet or film according to claim 11, characterized in that 0.01 to 5% by weight, relative to the polymer, of micro-mica is present.
Claim 14
Dependent Claim
51 words
A sheet or film according to claim 1, which is additionally embossed while still retaining in the embossed state a matted and scratch-resistant surface characterized by a structure in which domes of the glass spheres which project from the surface of said sheet or film are completely covered by the thermoplastic.
Claim 15
Dependent Claim
169 words
An integrated two-step continuous process for the manufacture of a matted and scratch-resistant, amorphous to crystalline sheet or film of a film-forming thermoplastic and a filler in an amount of 2 to 25% by weight, based on the weight of polymer, comprising extruding from an extrusion means, at the melt extrusion temperature of the thermoplastic, a thermoplastic composition containing a thermoplastic and filler, said filler consisting of glass spheres of size from 0.5 to 75μ, uniformly distributed therein, and taking-up said sheet or film on a take-up means at a temperature below the glass transition temperature of said thermoplastic, said take-up means being operated at such a rate as to cause said sheet or film to be stretched in the melt-fluid state at a decreasing temperature gradient between the temperature of the melt extrusion means and the temperature of the take-up means and to cause the surface of said sheet or film to be characterized by projecting domes of the glass spheres which are still completely covered by thermoplastic.
Claim 16
Dependent Claim
169 words
An integrated two-step continuous process for the manufacture of a matted and scratch-resistant, amorphous to crystalline sheet or film of a film-forming thermoplastic and a filler in an amount of 2 to 25% by weight, based on the weight of polymer, comprising extruding from an extrusion means, at the melt extrusion temperature of the thermoplastic, a thermoplastic composition containing a thermoplastic and filler, said filler consisting of glass spheres of size from 0.5 to 75μ, uniformly distributed therein, and taking-up said sheet or film on a take-up means at a temperature below the glass transition temperature of said thermoplastic, said take-up means being operated at such a rate as to cause said sheet or film to be stretched in the melt-fluid state at a decreasing temperature gradient between the temperature of the melt extrusion means and the temperature of the take-up means and to cause the surface of said sheet or film to be characterized by projecting domes of the glass spheres which are still completely covered by thermoplastic.
Claim 17
Dependent Claim
19 words
A process according to claim 14, characterized in that the glass spheres are of size from 0.5 to 50μ.
Claim 18
Dependent Claim
20 words
A process according to claim 14, characterized in that the glass spheres have an average size of 0.5 to 20μ.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |