US4810434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacture of surface-modified oriented polymeric film
Assignee: Mitsubishi Chemical America Inc
•
Filing: 1986-10-17
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Granted: 1989-03-07
•
Expires: 2006-10-17
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
2026-11-04 19:31
CPC Classifications
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: 19
Claim 1
Independent Claim
48 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.
Claim 2
Dependent Claim
48 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.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein the thermoplastic polymeric resin is selected from the group of films consisting of polyolefins, polyamides, and polyesters.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein the thermoplastic film is a polyester.
Claim 5
Dependent Claim
12 words
The process of claim 3 wherein the polyester film is polyethylene terephthalate.
Claim 6
Dependent Claim
12 words
The process of claim 2 wherein the thermoplastic resin is a polyolefin.
Claim 7
Dependent Claim
10 words
The process of claim 5 wherein the polyolefin is polypropylene.
Claim 8
Dependent Claim
10 words
The process of claim 5 wherein the polyolefin is polyethylene.
Claim 9
Dependent Claim
12 words
The process of claim 2 wherein the thermoplastic resin is a polyamide.
Claim 10
Dependent Claim
27 words
The process of claim 1 wherein said short pulse of radiation delivers approximately 7 to 14 Joules of radiant energy per square centimeter of polymeric film surface.
Claim 11
Dependent Claim
16 words
The process of claim 1 wherein said pulse of radiation comprises infrared, visible, and ultraviolet wavelengths.
Claim 12
Dependent Claim
36 words
The process of claim 9 wherein the short burst 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.
Claim 13
Dependent Claim
20 words
The process of claim 11 wherein said polymeric film is selected from the group consisting of polyolefins, polyamides, and polyesters.
Claim 14
Dependent Claim
12 words
The process of claim 12 wherein said polymeric film is a polyester.
Claim 15
Dependent Claim
12 words
The process of claim 13 wherein said polyester film is polyethylene terephthalate.
Claim 16
Dependent Claim
12 words
The process of claim 11 wherein said polymeric film is a polyolefin.
Claim 17
Dependent Claim
10 words
The process of claim 15 wherein said polyolefin is polypropylene
Claim 18
Dependent Claim
10 words
The process of claim 15 wherein said polyolefin is polyethylene.
Claim 19
Dependent Claim
12 words
The process of claim 11 wherein said polymeric film is a polyamide.
References Cited (Backward Citations)
US2746084A
Cited
US2935418A
Cited
US2876187A
Cited
US3262808A
Cited
US3145242A
Cited
US3669716A
Cited
GB1117354A
Cited
GB1149812A
Cited
US3491009A
Cited
US3674531A
Cited
US3646188A
Cited
US3930064A
Cited
US3740287A
Cited
US4167669A
Cited
US3880966A
Cited
US3900538A
Cited
US3988157A
Cited
US3943046A
Cited
US4000102A
Cited
US4140740A
Cited
US4092518A
Cited
US4123308A
Cited
US4247496A
Cited
US4214035A
Cited
US4417948A
Cited
US4631155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |