US4624893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive adhesive tapes or sheets
Assignee: Lintec Corp
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Filing: 1985-02-11
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Granted: 1986-11-25
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Expires: 2005-02-11
Abstract
Abstract An 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 an organic fluorine compound, and an adhesive mass layer provided with respect to said release layer and containing a minute and spherical elastomer polymer, said adhesive mass layer having an adhesion of no more than 150 g/cm.
Inventors
- 👤 Tomishi Shibano
- 👤 Itsuo Kimura
- 👤 Hiroaki Nomoto
- 👤 Sachio Maruchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:00
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/21; C09J7/30; C09J7/38; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/28; Y10T428/2839; Y10T428/2848; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
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 or starch and a water-soluble organic fluorine compound selected from the group consisting of water-soluble salts of perfluoroalkyl phosphates, perfluoroalkyl sulfonamide phosphates, perfluoroalkoxyalkyl carbamates, perfluoroalkyl monocarboxylic acid derivatives, perfluoroalkylamines, and polymers having as a skeleton acrylic acid, methacrylic acid, vinyl alcohols, epoxy, fumaric acid, wherein each of said polymers contains a C 6 -C 12 fluorocarbon group on a repeating unit of the polymer, and an adhesive mass layer provided with respect to said release layer and containing a minute and spherical elastomeric polymer, said PSA tape or sheet having an adhesion of no more than 150 g/cm.
Claim 2
Dependent Claim
124 words
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 or starch and a water-soluble organic fluorine compound selected from the group consisting of water-soluble salts of perfluoroalkyl phosphates, perfluoroalkyl sulfonamide phosphates, perfluoroalkoxyalkyl carbamates, perfluoroalkyl monocarboxylic acid derivatives, perfluoroalkylamines, and polymers having as a skeleton acrylic acid, methacrylic acid, vinyl alcohols, epoxy, fumaric acid, wherein each of said polymers contains a C 6 -C 12 fluorocarbon group on a repeating unit of the polymer, and an adhesive mass layer provided with respect to said release layer and containing a minute and spherical elastomeric polymer, said PSA tape or sheet having an adhesion of no more than 150 g/cm.
Claim 3
Dependent Claim
38 words
The pressure-sensitive adhesive tape or sheet according to claim 1, wherein said modified starch or starch is selected from the group consisting of α-starch, dextrin, oxidized starch, esterified starch, etherified starch, cationic starch, hydroxyethylated starch and mixtures thereof.
Claim 4
Dependent Claim
22 words
The pressure-sensitive adhesive tape or sheet of claim 1, wnerein the release layer has a thickness of no less than 0.5 microns.
Claim 5
Dependent Claim
21 words
A pressure-sensitive adhesive tape or sheet of claim 1, wherein the release layer has a thickness of 1 to 5 microns.
Claim 6
Dependent Claim
28 words
The pressure-sensitive adhesive tape or sheet of claim 1, wherein the amount of the organic fluorine compound is no less than 0.5% by weight of said release layer.
Claim 7
Dependent Claim
27 words
The pressure-sensitive adhesive tape or sheet of claim 1, wherein the amount of the organic fluorine compound is 1 to 80% by weight of said release layer.
Claim 8
Dependent Claim
35 words
The tape or sheet as claimed in claim 1, wherein the main component of said adhesive mass has a glass transition temperature of no higher than -50° C., as measured with DSC (differential scanning calorimeter).
Claim 9
Dependent Claim
21 words
A pressure-sensitive adhesive tape or sheet of claim 7, wherein the glass transition temperature is from -70° C. to -90° C.
References Cited (Backward Citations)
US4513059A
Cited
US4514457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |