Patent US5378536A successfully refreshed from Google Patents.
US5378536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Repositionable adhesive tape
Assignee: 3M Co
•
Filing: 1992-04-27
•
Granted: 1995-01-03
•
Expires: 2012-04-27
Abstract
Abstract An adhesive of certain elastomeric block copolymers and tackifying materials can be hot-melt coated onto a flexible backing to provide an adhesive tape, two pieces of which can bond to each other to have excellent resistance to shear forces but can be easily peeled apart, even after prolonged periods of time. The adhesive can be low-tack or tack-free. When the novel adhesive is tacky, it can bind sheets into a note pad from which individual sheets can be removed, temporarily adhered to paper and other substrates, and later cleanly removed, even after prolonged contact.
Inventors
- 👤 John A. Miller
- 👤 George J. Clements
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:43
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/58; A61F; A61F13/00; A61F13/15; A61F13/56; A61F13/58; C; C09; C09J; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/387; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2861; Y10T428/2878; Y10T428/2883
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
159 words
An resealable cohesive adhesive closure system comprising; an article having at least one resealable cohesive adhesive closure, the at least one adhesive closure comprising two opposing closure elements at separate locations on said article, said opposing closure elements capable of overlapping to form said at least one resealable article adhesive closure, self-adhering adhesive on each of said at least two closure elements comprising by weight: from 20 to 80 parts of at least one elastomeric block copolymer selected from the group consisting of styrene/butadiene, styrene/isoprene, and styrene/ethylene-butylene block copolymers, and correspondingly from 80 to 20 parts of tackifying material selected from tackifier resin and a blend of tackifier resin and liquid plasticizer oil; which self-adhering adhesive has a composite midblock glass transition temperature (CMTg) from 225 Kelvin to 240 Kelvin when the adhesive is based on styrene/isoprene or styrene/ethylene-butylene block copolymers and a CMTg from 215 Kelvin to 235 Kelvin when the adhesive is based on styrene/butadiene block copolymer.
Claim 2
Dependent Claim
159 words
An resealable cohesive adhesive closure system comprising; an article having at least one resealable cohesive adhesive closure, the at least one adhesive closure comprising two opposing closure elements at separate locations on said article, said opposing closure elements capable of overlapping to form said at least one resealable article adhesive closure, self-adhering adhesive on each of said at least two closure elements comprising by weight: from 20 to 80 parts of at least one elastomeric block copolymer selected from the group consisting of styrene/butadiene, styrene/isoprene, and styrene/ethylene-butylene block copolymers, and correspondingly from 80 to 20 parts of tackifying material selected from tackifier resin and a blend of tackifier resin and liquid plasticizer oil; which self-adhering adhesive has a composite midblock glass transition temperature (CMTg) from 225 Kelvin to 240 Kelvin when the adhesive is based on styrene/isoprene or styrene/ethylene-butylene block copolymers and a CMTg from 215 Kelvin to 235 Kelvin when the adhesive is based on styrene/butadiene block copolymer.
Claim 3
Dependent Claim
22 words
The resealable adhesive closure system of claim 1 wherein said self-adhering adhesive has a 90° Peel Value of 0 to 2N/25 mm.
Claim 4
Dependent Claim
48 words
The resealable adhesive closure system of claim 1 wherein the adhesive CMTg is from 230 Kelvin to 240 Kelvin when the adhesive is based on styrene/isoprene or styrene/ethylene-butylene block copolymers and a CMTg from 225 Kelvin to 235 Kelvin when the adhesive is based on styrene/butadiene block copolymer.
Claim 5
Dependent Claim
51 words
The resealable adhesive closure system of claim 1 wherein the adhesive on said opposing closure elements is in the form of an adhesive patch, and, when said closure elements overlap, the adhesive patches bond to each other to form said closure having a peel force bond of from 2 to 12N.
Claim 6
Dependent Claim
51 words
The resealable adhesive closure system of claim 4 wherein said adhesive patches are each 3 to 6 cm in length and from 1.5 to 3 cm in width, with the lengthwise direction of each adhesive patch being orthogonal to the lengthwise direction of the adhesive patch on the opposing closure element.
References Cited (Backward Citations)
US2648856A
Cited
US2714562A
Cited
US2962404A
Cited
US3049228A
Cited
US3239478A
Cited
DE1918626A1
Cited
US3635861A
Cited
US3954692A
Cited
US3638651A
Cited
US3691140A
Cited
US3917607A
Cited
US3932328A
Cited
US4189547A
Cited
US4104327A
Cited
US4136699A
Cited
US4418123A
Cited
US4288567A
Cited
US4300562A
Cited
US4399249A
Cited
US4791024A
Cited
GB2116253A
Cited
US4514554A
Cited
US4780367A
Cited
US4522874A
Cited
US4717749A
Cited
US4652491A
Cited
US4761341A
Cited
US4785043A
Cited
US4684685A
Cited
US4810574A
Cited
US4728572A
Cited
US4787897A
Cited
AU7459587A
Cited
US4710190A
Cited
EP0260873A2
Cited
JPS63189485A
Cited
AU1170088A
Cited
WO1988008128A1
Cited
JPS6418604A
Cited
JPS6438280A
Cited
AU2044288A
Cited
US4833193A
Cited
US4759754A
Cited
US5028646A
Cited
US5112889A
Cited
US4906691A
Cited
US4861635A
Cited
US5019071A
Cited
US5019072A
Cited
US5085655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-02 | 1998-07-04 | 1999-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-02 | 2002-07-04 | 2003-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-02 | 2006-07-04 | 2007-01-03 | $7700.00 | Window Closed / Lapsed |