US4631155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacture of surface-modified oriented polymeric film
Assignee: CNA Holdings LLC
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Filing: 1985-02-01
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Granted: 1986-12-23
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Expires: 2005-02-01
Abstract
Abstract A process for surface modification of oriented polymeric film is disclosed. The process, applicable to polyesters, polyolefins, and polyamides, involves subjecting the film surface to at least one short pulse of intense electromagnetic radiation. Such surface treatment enhances the heat seal adhesion of the oriented polymeric film.
Inventors
- 👤 R. Scott Caines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:38
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; B; B29; B29C; B29C59/00; B29C59/16; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0822; B29C2035/0827; B29C2035/0833; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/10; B29K2023/12; B29K2067/00; B29K2077/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
67 words
A process for surface modification of oriented, thermoplastic polymeric film comprising subjecting at least one surface of said polymeric film to a short pulse of electromagnetic radiation possessing sufficient intensity to enhance the heat seal adhesion of said film without substantially decreasing the tensile strength of the film, wherein only selected areas or strips of the film surface are subjected to said short pulse of electromagnetic radiation.
Claim 2
Dependent Claim
67 words
A process for surface modification of oriented, thermoplastic polymeric film comprising subjecting at least one surface of said polymeric film to a short pulse of electromagnetic radiation possessing sufficient intensity to enhance the heat seal adhesion of said film without substantially decreasing the tensile strength of the film, wherein only selected areas or strips of the film surface are subjected to said short pulse of electromagnetic radiation.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein said polymeric film is selected from the group consisting of polyolefins, polyamides, and polyesters.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein said polymeric film is a polyester.
Claim 5
Dependent Claim
12 words
The process of claim 3 wherein said polyester film is polyethylene terephthalate.
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein said polymeric film is a polyolefin.
Claim 7
Dependent Claim
10 words
The process of claim 5 wherein said polyolefin is polypropylene.
Claim 8
Dependent Claim
10 words
The process of claim 5 wherein said polyolefin is polyethylene.
Claim 9
Dependent Claim
12 words
The process of claim 1 wherein said polymeric film is a polyamide.
Claim 10
Dependent Claim
29 words
The process of claim 1 wherein said short pulse of electromagnetic radiation delivers approximately 7 to 14 joules of radiant energy per square centimeter of selected polymeric film surface.
Claim 11
Dependent Claim
17 words
The process of claim 1 wherein said short pulse of radiation comprises infrared, visible, and ultraviolet wavelengths.
Claim 12
Dependent Claim
36 words
The process of claim 9 wherein the short pulse of electromagnetic radiation comprises an emission from a Xenon gas filled quartz lamp produced by high energy capacitive discharge which has a duration of approximately 1 millisecond.
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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) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |