Patent US4692380A successfully refreshed from Google Patents.
US4692380A
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Metallizable polypropylene film
Assignee: Applied Extrusion Technologies Inc
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Filing: 1986-04-21
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Granted: 1987-09-08
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Expires: 2006-04-21
Abstract
Abstract This invention relates to the metallized, biaxially oriented polypropylene films which exhibit good adhesion between the polypropylene and the metal coating, but which, at the same time, have surface properties whereby they are readily machine handleable for processing.
Inventors
- 👤 Donald E. Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:57
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; C; C08; C08J; C08J5/00; C08J5/18; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/052; C08K; C08K5/00; C08K5/16; C08K5/20; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; C08J2423/00; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31855; Y10T428/31909
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
69 words
A polypropylene film comprising a homopolypropylene core containing about 0.03 to 0.15% by weight based on the polymer of a fatty acid amide slip agent and having on one of its surfaces a 1 to 20 gauge layer comprised of a corona-treated propylene-ethylene copolymer containing about 1 to 10 wt. % ethylene and having no slip agent included therein and having a metal coating applied to said corona-treated layer.
Claim 2
Dependent Claim
69 words
A polypropylene film comprising a homopolypropylene core containing about 0.03 to 0.15% by weight based on the polymer of a fatty acid amide slip agent and having on one of its surfaces a 1 to 20 gauge layer comprised of a corona-treated propylene-ethylene copolymer containing about 1 to 10 wt. % ethylene and having no slip agent included therein and having a metal coating applied to said corona-treated layer.
Claim 3
Dependent Claim
21 words
A polypropylene film according to claim 1 wherein the slip agent is present in the amount of about 0.05 to 0.1%.
Claim 4
Dependent Claim
13 words
A polypropylene film according to claim 1 wherein the slip agent is erucamide.
Claim 5
Dependent Claim
20 words
A polypropylene film according to claim 3 wherein the erucamide is present in the amount of about 0.05 to 0.1%.
Claim 6
Dependent Claim
16 words
A polypropylene film according to claim 4 wherein the unmetallized surface carries a heat seal coating.
Claim 7
Dependent Claim
13 words
A polypropylene film according to claim 1 wherein the metal coating is aluminum.
Claim 8
Dependent Claim
13 words
A polypropylene film according to claim 5 wherein the metal coating is aluminum.
References Cited (Backward Citations)
US4294882A
Cited
US4345005A
Cited
US4599275A
Cited
US4559266A
Cited
US4508786A
Cited
US4604322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |