US4539263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of ionomer with propylene copolymer and articles
Assignee: EIDP Inc
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Filing: 1984-05-23
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Granted: 1985-09-03
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Expires: 2004-05-23
Abstract
Abstract Blends of (a) 80-93 weight percent of an ethylene/acid ionomer, and (b) 7-20 weight percent of a propylene/α-olefin copolymer are used to prepare peelable seals having nearly constant and predictable peel strength over an extended heat seal temperature range. Some of the seals so produced also show stress whitening.
Inventors
- 👤 George L. Hoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:16
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08L23/0876; B; B32; B32B; B32B27/00; B32B27/30; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C09J123/0846; C09J123/0869; C09J123/0876; C08L23/10; C08L23/14; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
Coextrusions for producing film characterized by a nearly constant peel strength over an extended heat seal temperature range, made from a molecular blend of polymeric materials comprising: (a) 80-93 weight percent of an ethylene/acid ionomer, and (b) 7-20 weight percent of a propylene/α-olefin copolymer, wherein the α-olefin comprises 1-12 weight percent of the copolymer, and wherein said coextrusion further comprises at least one extrudable material other than said molecular blend.
Claim 2
Dependent Claim
70 words
Coextrusions for producing film characterized by a nearly constant peel strength over an extended heat seal temperature range, made from a molecular blend of polymeric materials comprising: (a) 80-93 weight percent of an ethylene/acid ionomer, and (b) 7-20 weight percent of a propylene/α-olefin copolymer, wherein the α-olefin comprises 1-12 weight percent of the copolymer, and wherein said coextrusion further comprises at least one extrudable material other than said molecular blend.
Claim 3
Dependent Claim
8 words
Laminates made from the coextrusions of claim 1.
Claim 4
Dependent Claim
64 words
Laminates characterized by a nearly constant peel strength over an extended heat seal temperature range, made from a molecular blend of polymeric materials comprising: (a) 80-93 weight percent of an ethylene/acid ionomer, and (b) 7-20 weight percent of a propylene/α-olefin copolymer, wherein the α-olefin comprises 1-12 weight percent of the copolymer, and wherein said laminate further comprises a substrate other than said molecular blend.
Claim 5
Dependent Claim
64 words
Laminates characterized by a nearly constant peel strength over an extended heat seal temperature range, made from a molecular blend of polymeric materials comprising: (a) 80-93 weight percent of an ethylene/acid ionomer, and (b) 7-20 weight percent of a propylene/α-olefin copolymer, wherein the α-olefin comprises 1-12 weight percent of the copolymer, and wherein said laminate further comprises a substrate other than said molecular blend.
Claim 6
Dependent Claim
54 words
Packages having peelable seals characterized by a nearly constant peel strength over an extended heat seal temperature range made from a molecular blend of polymeric materials comprising: (a) 80-93 weight percent of an ethylene/acid ionomer, and (b) 7-20 weight percent of a propylene/α-olefin copolymer, wherein the α-olefin comprises 1--12 weight percent of the copolymer.
Claim 7
Dependent Claim
54 words
Packages having peelable seals characterized by a nearly constant peel strength over an extended heat seal temperature range made from a molecular blend of polymeric materials comprising: (a) 80-93 weight percent of an ethylene/acid ionomer, and (b) 7-20 weight percent of a propylene/α-olefin copolymer, wherein the α-olefin comprises 1--12 weight percent of the copolymer.
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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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |