US4977003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nontacky acrylonitrile/butadiene adhesive tape
Assignee: 3M Co
•
Filing: 1985-02-20
•
Granted: 1990-12-11
•
Expires: 2005-02-20
Abstract
Abstract Adhesive tape, the adhesive layer of which comprises a copolymer of (a) acrylonitrile and (b) butadiene and/or isoprene. Even though such an adhesive copolymer layer is usually substantially nontacky, it forms under moderate pressure bonds to many substrates which become stronger than the substrates. The bonds become strong more quickly when heated while the pressure is being applied. For a usefully long period of time after initiating a bond, the tape usually is repositionable.
Inventors
- 👤 Robert C. Brown
- 👤 Shih-Lai Lu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:37
CPC Classifications
C; C09; C09J; C09J109/00; C09J109/02; C09J7/00; C09J7/20; C09J7/203; C09J7/30; C09J7/38; C09J7/381; C09J7/383; Y; Y10; Y10S; Y10S206/00; Y10S206/813; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1345; Y10T428/1352; Y10T428/1355; Y10T428/1397; Y10T428/24; Y10T428/24802; Y10T428/28; Y10T428/2839; Y10T428/2852; Y10T428/2878; Y10T428/2883; Y10T428/2887
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
121 words
Adhesive tape comprising a backing and an essentially tack-free adhesive layer at least about 0.013 mm thick that consists essentially of an uncrosslinked, tackifier-free copolymer of (a) 10 to 50 weight percent of acrylonitrile and (b) 50 to 90 weight percent of at lest one of butadiene and isoprene, said copolymer having a Mooney viscosity of from about 45 to 95, and said adhesive copolymer layer having a water contact angle of at least 20°, said tape initially repositionably bonding at room temperature directly to substrates of polyvinyl chloride, polycarbonate, polystyrene, corona-treated polyester, acrylate, vinyl chloride-vinyl acetate copolymer, or shellac, the strength of the bond increasing in a short time after application to the extent that repositionability is no longer possible.
Claim 2
Dependent Claim
121 words
Adhesive tape comprising a backing and an essentially tack-free adhesive layer at least about 0.013 mm thick that consists essentially of an uncrosslinked, tackifier-free copolymer of (a) 10 to 50 weight percent of acrylonitrile and (b) 50 to 90 weight percent of at lest one of butadiene and isoprene, said copolymer having a Mooney viscosity of from about 45 to 95, and said adhesive copolymer layer having a water contact angle of at least 20°, said tape initially repositionably bonding at room temperature directly to substrates of polyvinyl chloride, polycarbonate, polystyrene, corona-treated polyester, acrylate, vinyl chloride-vinyl acetate copolymer, or shellac, the strength of the bond increasing in a short time after application to the extent that repositionability is no longer possible.
Claim 3
Dependent Claim
12 words
Adhesive tape as defined in claim 1 wherein said copolymer is hydrogenated.
Claim 4
Dependent Claim
16 words
Adhesive tape as defined in claim 1, the adhesive copolymer layer of which contains a filler.
Claim 5
Dependent Claim
28 words
A pouch formed of polyolefin with an opening that is releasably closed by a flap to which is permanently adhered an adhesive tape as defined in claim 3.
Claim 6
Dependent Claim
20 words
Adhesive tape as defined in claim 1 wherein monomer (a) provides from 20 to 40 weight percent of the copolymer.
Claim 7
Dependent Claim
23 words
Adhesive tape as defined in claim 1 wherein the backing has a low-adhesion surface, thus permitting the adhesive copolymer layer to be transfered.
Claim 8
Dependent Claim
20 words
An article to which is adhered a piece f the adhesive copolymer layer of the tape defined in claim 6.
Claim 9
Dependent Claim
15 words
Adhesive tape as defined in claim 6, the adhesive copolymer layer of which is discontinuous.
Claim 10
Dependent Claim
34 words
Adhesive tape as defined in claim 8, the adhesive copolymer layer of which forms an orderly pattern of closely spaced segments, the widths of which are small compared to the width of the tape.
Claim 11
Dependent Claim
16 words
Adhesive tape as defined in claim 1 wherein the water contact angle is at least 50°.
Claim 12
Dependent Claim
19 words
Adhesive tape as defined in claim 1, the adhesive copolymer layer of which is permanently bonded to the backing.
Claim 13
Dependent Claim
20 words
A container formed with an opening which is sealed by a piece of the adhesive tape defined in claim 10.
Claim 14
Dependent Claim
38 words
A container formed with an opening which is sealed by two pieces of adhesive tape, each extending across the opening at opposite faces, at least one of said pieces being an adhesive tape as defined by claim 11.
Claim 15
Dependent Claim
23 words
A container having a removable cap that is sealed to the container by a strip of adhesive tape as defined in claim 12.
Claim 16
Dependent Claim
13 words
A blister pack sealed with an adhesive tape as defined in claim 1.
Claim 17
Dependent Claim
52 words
The tape of claim 1 wherein the backing comprises a strong transparent thermoplastic film, the adhesive is transparent, and the exposed surface of the adhesive is covered by a thin transparent thermoplastic release layer which is strongly adherent to the film backing and to which said adhesive copolymer layer is poorly adherent.
Claim 18
Dependent Claim
29 words
A composite adhesive tape as defined in claim 16 wherein the film backing is a vinyl film and the release layer is a copolymer of ethylene and vinyl acetate.
Claim 19
Dependent Claim
14 words
A thermoformed blister formed from a piece of tape as defined in claim 16.
Claim 20
Dependent Claim
28 words
A thermoformed blister as defined in claim 18 having a plurality of compartments, and a punch-open membrane adhered to said adhesive layer at the flanges of the blister.
Claim 21
Dependent Claim
15 words
A blister as defined in claim 19 wherein the punch-open membrane is a paper-foil laminate.
Claim 22
Dependent Claim
26 words
A laminate comprising the tape of claim 1 bonded directly to a substrate of polyvinyl chloride, polycarbonate, polystyrene, corona-treated polyester, vinyl chloride-vinyl acetate copolymer, or shellac.
References Cited (Backward Citations)
US2601016A
Cited
US2535852A
Cited
US2879252A
Cited
US2819010A
Cited
US3076588A
Cited
US3330720A
Cited
US3406039A
Cited
US3339788A
Cited
US3455859A
Cited
US3380938A
Cited
US3741786A
Cited
US4102835A
Cited
US3861956A
Cited
US3924748A
Cited
US4212912A
Cited
US4248917A
Cited
US4166706A
Cited
US4230761A
Cited
US4483018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |