EP0315072A2
Expired / Lapsed
EP
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Pressure-sensitive adhesive layer
Assignee: Nippon Carbide Industries Co Inc
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Filing: 1988-10-28
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Granted: —
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Expires: 2008-10-28
Abstract
Abstract A pressure-sensitive adhesive layer having, on at least one surface thereof, a layer of evenly dispersed non-adhesive solid particles having an average particle diameter of 10 to 60 microns, wherein at least about half of the solid particles project from the surface of the adhesive layer to a height corresponding to at least about one-fourth of the average particle diameter of the solid particles, and if the solid particles are hollow particles, the walls of the hollow particles are not rupturable by the pressure of bonding. The pressure-sensitive adhesive layer has a very low initial adhesion strength (adhesion strength before press-bonding). After press-bonding, it rapidly develops adhesion strength, and attains a very high final adhesion strength.
Inventors
- 👤 Katsura Ochi
- 👤 Yasuaki Oonishi
- 👤 Kazuhisa Kinsen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 11:26
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/40; C09J7/403; C09J7/30; C09J7/38; B; B05; B05B; B05B12/00; B05B12/16; B05B12/20; B05B12/24; C09J2301/00; C09J2301/20; C09J2301/204; C09J2301/30; C09J2301/302; C09J2301/40; C09J2301/412; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1405; Y10T428/25; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
86 words
A pressure-sensitive adhesive layer having, on at least one surface thereof, a layer of evenly dispersed non-adhesive solid particles having an average particle diameter of 10 to 60 microns, wherein at least about half of the solid particles project from the surface of the adhesive layer to a height corresponding to at least about one-fourth of the average particle diameter of the solid particles, and if the solid particles are hollow particles, the walls of the hollow particles are not rupturable by the pressure of bonding.
Claim 2
Dependent Claim
86 words
A pressure-sensitive adhesive layer having, on at least one surface thereof, a layer of evenly dispersed non-adhesive solid particles having an average particle diameter of 10 to 60 microns, wherein at least about half of the solid particles project from the surface of the adhesive layer to a height corresponding to at least about one-fourth of the average particle diameter of the solid particles, and if the solid particles are hollow particles, the walls of the hollow particles are not rupturable by the pressure of bonding.
Claim 3
Dependent Claim
37 words
The pressure-sensitive adhesive layer of claim 1 in which the ratio of the non-adhesive solid particles covering the surface of the adhesive layer based on the surface area of the latter is about 1 to 30 %.
Claim 4
Dependent Claim
26 words
The pressure-sensitive adhesive layer of claim 1 or 2 in which the non-adhesive solid particles have an average particle diameter of about 10 to 40 microns.
Claim 5
Dependent Claim
24 words
The pressure-sensitive adhesive layer in claim 2 or 3 in which the covering ratio of the solid particles is about 3 to 20 %.
Claim 6
Dependent Claim
40 words
The pressure-sensitive adhesive layer in any one of claims 2 to 4 in which at least about half of the non-adhesive solid particles project from the surface of the adhesive layer to a height of at least about 7 microns.
Claim 7
Dependent Claim
80 words
The pressure-sensitive adhesive layer of any one of claims 1 to 5 in which at least about 50 % by weight of the non-adhesive solid particles have a particle diameter ranging from the average particle diameter minus 5 microns to the average particle diameter plus 5 microns, and at least about 90 % by weight of the solid particles have a particle diameter ranging from the average particle diameter minus 8 microns to the average particle diameter plus 8 microns.
Claim 8
Dependent Claim
154 words
A pressure-sensitive adhesive sheet-like structure comprising (A) a pressure-sensitive adhesive layer having, on at least one surface thereof, a layer of evenly dispersed non-adhesive solid particles having an average particle diameter of 10 to 60 microns, wherein at least about half of the solid particles project from the surface of the adhesive layer to a height corresponding to at least about one-fourth of the average particle diameter of the solid particles, and if the solid particles are hollow particles, the walls of the hollow particles are not rupturable by the pressure of bonding, (B) a strippable support layer contacting the projecting portions of the non-adhesive solid particles on the surface of the adhesive layer and having depressions on the surface intimately receiving the projecting portions of the solid particles, and (C) a substrate layer laminated to that surface of the pressure-sensitive adhesive layer which does not have the layer of the dispersed solid particles.
Claim 9
Dependent Claim
154 words
A pressure-sensitive adhesive sheet-like structure comprising (A) a pressure-sensitive adhesive layer having, on at least one surface thereof, a layer of evenly dispersed non-adhesive solid particles having an average particle diameter of 10 to 60 microns, wherein at least about half of the solid particles project from the surface of the adhesive layer to a height corresponding to at least about one-fourth of the average particle diameter of the solid particles, and if the solid particles are hollow particles, the walls of the hollow particles are not rupturable by the pressure of bonding, (B) a strippable support layer contacting the projecting portions of the non-adhesive solid particles on the surface of the adhesive layer and having depressions on the surface intimately receiving the projecting portions of the solid particles, and (C) a substrate layer laminated to that surface of the pressure-sensitive adhesive layer which does not have the layer of the dispersed solid particles.
Claim 10
Dependent Claim
11 words
The structure of claim 7 which is for use in marking.
Claim 11
Independent Claim
92 words
A method of producing a pressure sensitive-adhesive layer which comprises dispersing non-adhesive solid particles having an average particle diameter of 10 to 60 microns on at least one surfce of a strippable sheet, pressing the solid particles into the support layer so that at least half of the solid particles are embedded in the support layer to a depth corresponding to at least about one-fourth of their average particle diameter, and then forming an adhesive layer on that surface of the support layer in which the solid particles are dispersed and embedded.
Claim 12
Independent Claim
92 words
A method of producing a pressure sensitive-adhesive layer which comprises dispersing non-adhesive solid particles having an average particle diameter of 10 to 60 microns on at least one surfce of a strippable sheet, pressing the solid particles into the support layer so that at least half of the solid particles are embedded in the support layer to a depth corresponding to at least about one-fourth of their average particle diameter, and then forming an adhesive layer on that surface of the support layer in which the solid particles are dispersed and embedded.
References Cited (Backward Citations)
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