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EP0255375A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Double-sided adhesive fabric-based material

Assignee: Nitto Denko Corp
•
Filing: 1987-07-29
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Granted: —
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Expires: 2007-07-29
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Abstract

Abstract A non-woven fabric support is used, e.g. of viscose rayon, a polyester or polyolefin, which has pores at least 50% of which penetrate through the fabric, the proportion of the area of the penetrating pores per area of the fabric being at least 20%, the average opening area of the penetrating pores being at least 0.001 mm², and the weight of the fabric is 50 g/m² or less. The fabric may be resin treated. A single coating of a pressure-sensitive adhesive (e.g. acrylic or rubber-based) solution or aqueous dispersion is formed on the inside or both sides of the fabric to a solids content of 10 - 300 g/m², and the coating is dried. The resultant double sided adhesive tape has uniform thickness and does not delaminate or suffer gapping.

Inventors

  • 👤 Toshiharu Nitto Electric Industrialco.Ltd Konishi
  • 👤 Hiroyuki Nitto Electric Industrialco.Ltd Ushiro
  • 👤 Takaaki Nitto Electric Industrialco.Ltd Moriyama

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 19:30
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/21; C09J2400/00; C09J2400/20; C09J2400/26; C09J2400/263; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249983; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/28; Y10T428/2848; Y10T442/00; Y10T442/20; Y10T442/2738

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 82 words
A double-sided adhesive tape, sheet or leaf comprising a support having provided on both surfaces thereof a pressure-­sensitive adhesive layer, wherein the support is a thin non-­woven fabric having the following properties: A) pores substantially penetrating from one surface to the other surface are present: B) the total area of the substantially penetrating pores is at least 20%; C) the average opening area of the substantially penetrating pores is at least 0.001 mm²; and D) its weight is 50 g/m² or less.
Claim 2
Dependent Claim 82 words
A double-sided adhesive tape, sheet or leaf comprising a support having provided on both surfaces thereof a pressure-­sensitive adhesive layer, wherein the support is a thin non-­woven fabric having the following properties: A) pores substantially penetrating from one surface to the other surface are present: B) the total area of the substantially penetrating pores is at least 20%; C) the average opening area of the substantially penetrating pores is at least 0.001 mm²; and D) its weight is 50 g/m² or less.
Claim 3
Dependent Claim 21 words
A double-sided adhesive material as claimed in Claim 1, wherein the area of the substantially penetrating pores is 30 to 90%.
Claim 4
Dependent Claim 26 words
A double-sided adhesive material as claimed in Claim 1 or 2, wherein the average opening area of the substantially penetrating pores is 0.005 to 0.5 mm².
Claim 5
Dependent Claim 25 words
A double-sided adhesive material as claimed in Claim 1, 2 or 3, wherein the weight of the thin non-woven fabric is 2 to 25 g/m².
Claim 6
Dependent Claim 23 words
A double-sided adhesive material as claimed in any preceding claim, wherein the thin non-woven fabric has a thickness of 180 µm or less.
Claim 7
Dependent Claim 37 words
A double-sided adhesive material as claimed in any preceding claim, wherein the support was coated with a solution of a synthetic resin having a modulus of elasticity of at least 10³ kg/cm², before the adhesive was coated.

References Cited (Backward Citations)

DE1594067A1 Cited
DE1569901B1 Cited
DE1594097A1 Cited
DE1719152A1 Cited

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