US4337284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film tear-tape and packaging film having tear-tape adherent thereto
Assignee: UCB SA
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Filing: 1980-01-28
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Granted: 1982-06-29
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Expires: 2000-01-28
Abstract
Abstract A tear-tape for attachment to a polymeric packaging film comprises a thermoplastic polymeric substrate having on a surface thereof a layer of a sealing resin comprising a blend of an ethylene-vinyl acetate copolymer and a plasticizer therefor. Bonding between the tear-tape and a polymeric packaging film substrate is enhanced by the presence of the plasticizer.
Inventors
- 👤 Gordon Cooper
- 👤 Patrick S. Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:03
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/35; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/14; Y10T428/1452; Y10T428/26; Y10T428/266; Y10T428/269; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2839; Y10T428/2852; Y10T428/2878; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
A tear-tape for attachment of a polymeric packaging film the tape comprising a thermoplastic polymeric substrate tape having a width of from 0.5 to 10 millimeters and a thickness of from 5 to 250 microns and having on a surface thereof a layer of a sealing resin comprising a blend of an ethylene-vinyl acetate copolymer and a plasticizer therefor, the plasticizer comprising from 2 to 30 percent by weight of the sealing resin.
Claim 2
Dependent Claim
73 words
A tear-tape for attachment of a polymeric packaging film the tape comprising a thermoplastic polymeric substrate tape having a width of from 0.5 to 10 millimeters and a thickness of from 5 to 250 microns and having on a surface thereof a layer of a sealing resin comprising a blend of an ethylene-vinyl acetate copolymer and a plasticizer therefor, the plasticizer comprising from 2 to 30 percent by weight of the sealing resin.
Claim 3
Dependent Claim
57 words
A tear-tape according to claim 1 wherein the substrate is of a polyolefin selected from the group consisting of low density polyethylene, high density polyethylene, a propylene homopolymer and a copolymer of propylene with up to 20% by weight of the copolymer of an alpha-mono-olefin containing 2 or from 4 to 10 carbon atoms in its molecule.
Claim 4
Dependent Claim
13 words
A tear-tape according to claim 1 wherein the substrate is an oriented film.
Claim 5
Dependent Claim
20 words
A tear-tape according to claim 1 wherein the sealing resin contains from 25 to 45 weight percent of vinyl acetate.
Claim 6
Dependent Claim
25 words
A tear-tape according to claim 1 wherein the plasticizer is an ester selected from the group consisting of an aromatic ester and an aliphatic ester.
Claim 7
Dependent Claim
72 words
A tearable packaging film comprising a polymeric packaging film and a thermoplastic polymeric tear-tape bonded thereto by a thermally curved layer of a sealing resin comprising a blend of an ethylene-vinyl acetate copolymer and a plasticizer therefor, the plasticizer comprising from 2 to 30 percent by weight of the sealing resin and the tape having a width of from 0.5 to 10 millimeters and a thickness of from 5 to 250 microns.
Claim 8
Dependent Claim
72 words
A tearable packaging film comprising a polymeric packaging film and a thermoplastic polymeric tear-tape bonded thereto by a thermally curved layer of a sealing resin comprising a blend of an ethylene-vinyl acetate copolymer and a plasticizer therefor, the plasticizer comprising from 2 to 30 percent by weight of the sealing resin and the tape having a width of from 0.5 to 10 millimeters and a thickness of from 5 to 250 microns.
Claim 9
Dependent Claim
17 words
A tearable packaging film according to claim 6 wherein the polymeric packaging film is a polyolefin film.
Claim 10
Dependent Claim
17 words
A tearable package comprising an article wrapped in a tearable packaging film as defined in claim 6.
References Cited (Backward Citations)
GB1006135A
Cited
GB1044502A
Cited
GB1382120A
Cited
US4132050A
Cited
US4020228A
Cited
US4127688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |