US4636432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensitive-adhesive tapes or sheets
Assignee: Lintec Corp
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Filing: 1985-02-04
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Granted: 1987-01-13
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Expires: 2005-02-04
Abstract
Abstract A pressure-sensitive adhesive tape or sheet including a paper substrate, a release layer provided on at least one side of said substrate and comprising modified starch and/or starch, and a pressure-sensitive adhesive mass layer provided with respect to said release layer and containing an elastomeric polymer microspheres, said pressure-sensitive adhesive tape or sheet having an adhesion of no more than 150 g/cm.
Inventors
- 👤 Tomishi Shibano
- 👤 Itsuo Kimura
- 👤 Sachio Maruchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:46
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/21; C09J7/30; C09J7/38; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/28; Y10T428/2839; Y10T428/2848; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982; Y10T428/31986
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
64 words
A pressure-sensitive adhesive tape or sheet comprising a paper substrate, a release layer provided on at least one side of said substrate and comprising modified starch and/or starch, and a pressure-sensitive adhesive mass layer provided on the substrate side opposite to said release layer and containing elastomeric polymer microspheres, said pressure-sensitive adhesive tape or sheet having an adhesion of no more than 150 g/cm.
Claim 2
Dependent Claim
64 words
A pressure-sensitive adhesive tape or sheet comprising a paper substrate, a release layer provided on at least one side of said substrate and comprising modified starch and/or starch, and a pressure-sensitive adhesive mass layer provided on the substrate side opposite to said release layer and containing elastomeric polymer microspheres, said pressure-sensitive adhesive tape or sheet having an adhesion of no more than 150 g/cm.
Claim 3
Dependent Claim
37 words
The tape or sheet as defined in claim 1, in which the main component of said pressure-sensitive adhesive mass has a glass transition temperature of no more than -50° C., as measured with DSC (differential scanning calorimeter).
Claim 4
Dependent Claim
37 words
The tape or sheet as defined in claim 1, in which the modified starch and/or starch is selected from the group consisting of starch, alpha-starch, dextrin, oxidized starch, esterified starch, etherified starch, cationic starch and mixtures thereof.
Claim 5
Dependent Claim
48 words
The tape or sheet as defined in claim 1, in which the elastomeric polymer microspheres are of a polymer selected from the group consisting of polyacrylate, natural rubber, SBR, polyisoprene, polybutadiene, and styrene/butadiene/acrylate ternary copolymer, and the microspheres have a means particle size of 10 to 100 microns.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |