US4735837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable adhesive sheet
Assignee: Nichiban Co Ltd
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Filing: 1985-08-08
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Granted: 1988-04-05
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Expires: 2005-08-08
Abstract
Abstract A removable adhesive sheet comprising a substrate (A) and an adhesive composition layer which comprises elastic micro-balls (B) and an adhesive (C), the adhesive composition layer being formed on an adhesive layer forming surface of the substrate, wherein the mixing proportion of the elastic micro-balls (B) to the adhesive (C) in the adhesive composition layer is 1:10 to 10:1 in terms of weight ratio, and the protrusive areas of the elastic micro-balls (B) partially protruding from the surface of the adhesive composition layer is entirely covered with the adhesive (C) has an adhesion capability that is not lowered through a frequent repetition of bonding to and removing from an adherend.
Inventors
- 👤 Hiroyasu Miyasaka
- 👤 Yasuaki Kitazaki
- 👤 Tetsuaki Matsuda
- 👤 Junichi Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:07
CPC Classifications
G; G09; G09F; G09F3/00; G09F3/08; G09F3/10; C; C09; C09J; C09J7/00; C09J7/30; C09J7/38; C09J2301/00; C09J2301/20; C09J2301/204; C09J2301/40; C09J2301/412; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1405; Y10T428/24; Y10T428/24777; Y10T428/24802; Y10T428/24826; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249984; Y10T428/249986; Y10T428/25; Y10T428/252; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
122 words
A removable adhesive sheet comprising a substrate (A) and an adhesive composition layer which comprises elastically deformable micro-balls (B), said micro-balls having a glass transition temperature ranging between -80° and 10° C., and an adhesive (C), the adhesive composition layer being formed on an adhesive layer-forming surface of the substrate, wherein (i) the mixing proportion of the elastic micro-balls (B) to the adhesive (C) in the adhesive composition layer is 1:10 to 10:1 in terms weight ratio and (ii) the protrusive areas of the elastic micro-balls (B) partially protruding form the surface of the adhesive composition layer is entirely covered with the adhesive (C), such that the adhesive sheet is repeatedly removable from contact between the adhesive composition layer and a surface.
Claim 2
Dependent Claim
122 words
A removable adhesive sheet comprising a substrate (A) and an adhesive composition layer which comprises elastically deformable micro-balls (B), said micro-balls having a glass transition temperature ranging between -80° and 10° C., and an adhesive (C), the adhesive composition layer being formed on an adhesive layer-forming surface of the substrate, wherein (i) the mixing proportion of the elastic micro-balls (B) to the adhesive (C) in the adhesive composition layer is 1:10 to 10:1 in terms weight ratio and (ii) the protrusive areas of the elastic micro-balls (B) partially protruding form the surface of the adhesive composition layer is entirely covered with the adhesive (C), such that the adhesive sheet is repeatedly removable from contact between the adhesive composition layer and a surface.
Claim 3
Dependent Claim
28 words
The removable adhesive sheet according to claim 1, wherein the particle diameter of the elastically deformable micro-balls (B) in the adhesive composition layer is 0.1 to 1,000 μm.
Claim 4
Dependent Claim
21 words
The removable adhesive sheet according to claim 1, wherein the thickness of said adhesive composition layer is 0.1 to 100 μm.
Claim 5
Dependent Claim
31 words
The removable adhesive sheet according to claim 1 wherein 100 to 1,000,000 pcs./cm 2 of the elastically deformable micro-balls (B) are distributed on the adhesive layer-forming surface of the substrate (A).
Claim 6
Dependent Claim
51 words
The removable adhesive sheet according to claim 1, wherein the adhesive composition layer is formed separately to have distributed areas on the adhesive layer forming surface of the substrate (A), and the percentage of the area of the adhesive composition layer relative to the adhesive layer-forming surface is 20 to 98%.
Claim 7
Dependent Claim
30 words
The removable adhesive sheet according to claim 1, wherein the mixing proportion of the elastic micro-balls (B) to the adhesive (C) in the adhesive composition layer is 1:5 to 5:1.
Claim 8
Dependent Claim
23 words
The removable adhesive sheet according to claim 2, wherein the particle diameter of the elastically deformable micro-balls (B) is 0.5 to 300 μm.
Claim 9
Dependent Claim
21 words
The removable adhesive sheet according to claim 3, wherein the thickness of the adhesive composition layer is 1 to 30 μm.
Claim 10
Dependent Claim
31 words
The removable adhesive sheet according to claim 4, wherein 1,000 to 150,000 pcs./cm 2 of the elastically deformable micro-balls (B) are distributed on the adhesive layer-forming surface of the substrate (A).
Claim 11
Dependent Claim
30 words
The removable adhesive sheet according to claim 5, wherein the percentage of the area of the adhesive composition layer relative to the adhesive layer-forming surface is of 20% to 90%.
Claim 12
Dependent Claim
23 words
The removable adhesive sheet according to claim 1, wherein the substrate (A) is a fibrous material or a film whose surface is smooth.
Claim 13
Dependent Claim
35 words
The removable adhesive sheet according to claim 1, wherein the elastically deformable micro-balls are comprised of high molecular polymers selected from a chain polymer, a graft polymer, a block polymer and a three-dimensional network polymer.
Claim 14
Dependent Claim
30 words
The removable adhesive sheet according to claim 1, wherein the elastically deformable micro-balls are the product of a process comprising the step of suspension polymerization of said micro-balls in water.
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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) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |