US4740335A
Expired / Lapsed
US
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Process for producing a deep-drawn article from a partially-crystalline polymeric material
Assignee: Carl Freudenberg KG
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Filing: 1986-08-04
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Granted: 1988-04-26
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Expires: 2006-08-04
Abstract
Abstract A process for producing a surface-embossed, deep-drawn article suitable for an interior finish or lining of a motor vehicle, for example, starts with a partially-crystalline polymeric material, i.e., one having crystallites, in film form. The film-form material is heated to a temperature below the melting point of its crystallites an surface embossed. The embossed material is then cooled and crosslinked. The crosslinking is preferably done by irradiating the cooled material with a high-energy beam such as an accelerated electron beam, for example. The cooled and crosslinked material is then reheated, this time to a temperature above the melting point of its crystallites, and deep drawn into the shape of the article.
Inventors
- 👤 Hans-Gunter Scholz
- 👤 Gerhard Graab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:09
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/02; B29C51/00; B29C51/26; B29C51/42; B29C51/426; B29C69/00; B29C69/02; B29C71/00; B29C71/04; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/16; B29K2995/00; B29K2995/0037; B29K2995/0041; Y; Y10; Y10S; Y10S264/00; Y10S264/65
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
76 words
A process for producing a deep-drawn article from a partially-crystalline polymeric material, comprising: providing a partially-crystalline polymeric material in film form; heating the film-form material to a temperature below the melting point of its crystallites; surface embossing the so-heated material; cooling the embossed material; crosslinking the cooled material; reheating the then-crosslinked material, this time to a temperature above the melting point of its crystallites; and deep drawing the reheated material into the shape of an article.
Claim 2
Dependent Claim
76 words
A process for producing a deep-drawn article from a partially-crystalline polymeric material, comprising: providing a partially-crystalline polymeric material in film form; heating the film-form material to a temperature below the melting point of its crystallites; surface embossing the so-heated material; cooling the embossed material; crosslinking the cooled material; reheating the then-crosslinked material, this time to a temperature above the melting point of its crystallites; and deep drawing the reheated material into the shape of an article.
Claim 3
Dependent Claim
23 words
The process of claim 1, wherein crosslinking the cooled material comprises irradiating the same with a high-energy beam of a power effective therefor.
Claim 4
Dependent Claim
12 words
The process of claim 2, wherein the high-energy beam comprises accelerated electrons.
Claim 5
Dependent Claim
20 words
The process of claim 2, wherein the power of the high-energy beam is from about 40 to about 80 kGy.
Claim 6
Dependent Claim
20 words
The process of claim 3, wherein the power of the high-energy beam is from about 40 to about 80 kGy.
Claim 7
Dependent Claim
31 words
The process of claim 1, wherein providing the partially-crystalline material comprises providing the same with, as a base substance, a predominant content of an ethylene-propylene copolymer or an ethylene-propylene-diene mixed polymer.
Claim 8
Dependent Claim
30 words
The process of claim 2, wherein providing partially-crystalline material comprises providing the same with, as a base substance, a predominant content of an ethylene-propylene copolymer or an ethylene-propylene-diene mixed polymer.
Claim 9
Dependent Claim
30 words
The process of claim 3, wherein providing partially-crystalline material comprises providing the same with, as a base substance, a predominant content of an ethylene-propylene copolymer or an ethylene-propylene-diene mixed polymer.
Claim 10
Dependent Claim
30 words
The process of claim 4, wherein providing partially-crystalline material comprises providing the same with, as a base substance, a predominant content of an ethylene-propylene copolymer or an ethylene-propylene-diene mixed polymer.
Claim 11
Dependent Claim
30 words
The process of claim 5, wherein providing partially-crystalline material comprises providing the same with, as a base substance, a predominant content of an ethylene-propylene copolymer or an ethylene-propylene-diene mixed polymer.
Claim 12
Dependent Claim
36 words
The process of claim 6, wherein providing the partially-crystalline material further comprises providing the same containing, in addition to the base substance, a uniformly-incorporated content of an elasticizing polymeric material that can be crosslinked by radiation.
Claim 13
Dependent Claim
36 words
The process of claim 6, wherein providing the partially-crystalline material further comprises providing the same containing, in addition to the base substance, a uniformly-incorporated content of an elasticizing polymeric material which can be crosslinked by radiation.
Claim 14
Dependent Claim
36 words
The process of claim 8, wherein providing the partially-crystalline material further comprises providing the same containing, in addition to the base substance, a uniformly-incorporated content of an elasticizing polymeric material which can be crosslinked by radiation.
Claim 15
Dependent Claim
36 words
The process of claim 9, wherein providing the partially-crystalline material further comprises providing the same containing, in addition to the base substance, a uniformly-incorporated content of an elasticizing polymeric material which can be crosslinked by radiation.
Claim 16
Dependent Claim
36 words
The process of claim 10, wherein providing the partially-crystalline material further comprises providing the same containing, in addition to the base substance, a uniformly-incorporated content of an elasticizing polymeric material which can be crosslinked by radiation.
References Cited (Backward Citations)
FR1212740A
Cited
US3270104A
Cited
US3333032A
Cited
US3563973A
Cited
DE2026427A1
Cited
US3872194A
Cited
GB1396573A
Cited
US3932575A
Cited
DE2455882A1
Cited
DE2539889A1
Cited
US4122137A
Cited
US4226687A
Cited
EP0010646A1
Cited
US4419320A
Cited
JPS5784836A
Cited
US4489034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |