US4125665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container sealing tape
Assignee: Permacel
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Filing: 1977-08-29
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Granted: 1978-11-14
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Expires: 1997-08-29
Abstract
Abstract A linerless pressure-sensitive adhesive container sealing tape which comprises a backing laminate, a unique pressure-sensitive adhesive layer on one of the major surfaces of the laminate and a release coating on the other major surface of the laminate. The tape is wound upon itself to form a roll with the pressure-sensitive adhesive layer facing inwardly toward the axis of the roll. The backing preferably comprises a first polyester film, a thin layer of metal coated onto one major surface of said first film to metallize this surface, a second polyester film, and a laminating adhesive layer adhering the second film to the metallized surface of the first film. The pressure-sensitive adhesive layer consists of an adhesive composition based upon a mixture of S-I-S and S-B-S linear or radial thermoplastic and elastomeric block copolymers wherein the S-blocks are thermoplastic and are derived from styrene or styrene homologues and the I-blocks and B-blocks are elastomeric and derived from isoprene and butadiene, respectively, together with a relatively high melting point tackifier resin and a relatively low molecular weight S-block associating bonding resin.
Inventors
- 👤 Cyrus W. Bemmels
- 👤 Richard A. Mumber
- 👤 Thomas J. Schirripa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:28
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B27/06; B32B27/08; B32B27/36; B32B7/00; B32B7/04; B32B7/12; B32B2250/00; B32B2250/02; B32B2250/24; B32B2250/244; B32B2255/00; B32B2255/10; B32B2255/20; B32B2255/205; B32B2307/00; B32B2307/40; B32B2307/402; B32B2307/416; B32B2307/50; B32B2307/54; B32B2307/558; B32B2307/582; B32B2307/5825; B32B2307/70; B32B2307/732; B32B2307/748; B32B2405/00; B32B2439/00; B32B2439/40; B32B2439/62; B32B2439/70; B32B2581/00; C; C09; C09J; C09J2400/00; C09J2400/10; C09J2400/16; C09J2400/163; C09J2421/00; C09J2467/00; C09J2467/006; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/28; Y10T428/2839; Y10T428/2848; Y10T428/2852; Y10T428/2878; Y10T428/2883; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31696
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
246 words
A pressure-sensitive adhesive container sealing tape which comprises a backing laminate, a pressure-sensitive adhesive layer on one of the major surfaces of the laminate and a release coating on the other major surface of the laminate, said tape being wound upon itself to form a roll with the pressure-sensitive adhesive layer facing inwardly toward the axis of the roll; said laminate comprising a first polyester film and a second polyester film laminated to one another through a reflective inner layer which comprises either, (a) a thin layer of metal coated onto one major surface of said first film to metallize said surface and a laminating adhesive layer adhering the second film to the metallized surface of the first film, or (b) a laminating adhesive layer containing metallic reflective material and adhering said first and second films to one another; said pressure sensitive adhesive layer consisting essentially of the following components the proportions of which are expressed in parts per one hundred parts by weight of the elastomeric component: (1) an elastomeric component comprising about 35-65 parts of each of S-I-S and S-B-S linear or radial thermoplastic and elastomeric block copolymers wherein the S-blocks are thermoplastic and are derived from styrene or styrene homologues and the I-blocks and the B-blocks are elastomeric and are derived from isoprene and butadiene, respectively; (2) about 20-50 parts of a relatively high melting point tackifier resin; and (3) about 10-35 parts of a relatively low molecular weight S-block associating bonding resin.
Claim 2
Dependent Claim
246 words
A pressure-sensitive adhesive container sealing tape which comprises a backing laminate, a pressure-sensitive adhesive layer on one of the major surfaces of the laminate and a release coating on the other major surface of the laminate, said tape being wound upon itself to form a roll with the pressure-sensitive adhesive layer facing inwardly toward the axis of the roll; said laminate comprising a first polyester film and a second polyester film laminated to one another through a reflective inner layer which comprises either, (a) a thin layer of metal coated onto one major surface of said first film to metallize said surface and a laminating adhesive layer adhering the second film to the metallized surface of the first film, or (b) a laminating adhesive layer containing metallic reflective material and adhering said first and second films to one another; said pressure sensitive adhesive layer consisting essentially of the following components the proportions of which are expressed in parts per one hundred parts by weight of the elastomeric component: (1) an elastomeric component comprising about 35-65 parts of each of S-I-S and S-B-S linear or radial thermoplastic and elastomeric block copolymers wherein the S-blocks are thermoplastic and are derived from styrene or styrene homologues and the I-blocks and the B-blocks are elastomeric and are derived from isoprene and butadiene, respectively; (2) about 20-50 parts of a relatively high melting point tackifier resin; and (3) about 10-35 parts of a relatively low molecular weight S-block associating bonding resin.
Claim 3
Dependent Claim
16 words
A pressure-sensitive container sealing tape according to claim 1, wherein said laminating adhesive is heat activatable.
Claim 4
Dependent Claim
19 words
A pressure-sensitive container sealing tape according to claim 2, wherein said laminating adhesive is applied as a hot melt.
Claim 5
Dependent Claim
19 words
A pressure-sensitive container sealing tape according to claim 2, wherein said laminating adhesive is a polyester hot melt adhesive.
Claim 6
Dependent Claim
39 words
A pressure-sensitive container sealing tape according to claim 4, wherein said first and second polyester films are of polyethylene terephthalate, and said polyester adhesive is based upon a polyester resulting from the esterification of ethylene glycol and phthallic acids.
Claim 7
Dependent Claim
23 words
A pressure-sensitive container sealing tape according to claim 1, wherein said tackifier resin has a melting point of at least about 90° C.
Claim 8
Dependent Claim
17 words
A pressure-sensitive container sealing tape according to claim 6, wherein said tackifier resin is a hydrocarbon resin.
Claim 9
Dependent Claim
27 words
A pressure-sensitive container sealing tape according to claim 1, wherein said bonding resin is selected from the group consisting of alpha-methyl styrene-vinyl toluene copolymers and coumarone-indene copolymers.
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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) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |