Waterproofing and airtight pressure-sensitive adhesive tape

• US 20050106387A1
• Filed: 10/21/2004
• Published: 05/19/2005
• Est. Priority Date: 10/22/2003
• Status: Active Grant

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: Munakata, Yasunori, Ishikawa, Masayuki, Inagaki, Sadayuki
• Granted Patent: US 7,351,472 B2
• Time in Patent Office: Days
• US Class Current: 428/354
• CPC Class Codes: B32B 2405/00 Adhesive articles, e.g. adhesive tapes labels B32B2519/00
• CPC Class Codes: B32B 25/00 Layered products comprising a layer of natural or synthetic rubber fibrous or filamentary layer made of a natural or synthetic rubber B32B5/02; particulate layer made of a natural or synthetic rubber B32B5/16; foamed layer made of a natural or synthetic rubber B32B5/18
• CPC Class Codes: B32B 25/08 of synthetic resin
• CPC Class Codes: B32B 25/14 comprising synthetic rubber copolymers B32B25/18 and B32B25/20 take precedence
• CPC Class Codes: B32B 25/16 comprising polydienes homopolymers or poly-halodienes homopolymers B32B25/12 takes precedence
• CPC Class Codes: B32B 25/18 comprising butyl or halobutyl rubber
• CPC Class Codes: B32B 27/308 comprising acrylic (co)polymers
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08K 3/26 Carbonates; Bicarbonates
• CPC Class Codes: C08L 23/22 Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
• CPC Class Codes: C08L 2666/06 Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
• CPC Class Codes: C09J 123/16 Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
• CPC Class Codes: C09J 2301/162 the carrier being a laminate constituted by plastic layers only
• CPC Class Codes: C09J 2421/006 in the substrate
• CPC Class Codes: C09J 7/29 Laminated material metallised plastics C09J7/22
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2835 including moisture or waterproof component
• CPC Class Codes: Y10T 428/2848 Three or more layers

Abstract

The waterproofing and airtight pressure-sensitive adhesive tape is a pressure-sensitive adhesive tape containing a substrate having a pressure-sensitive adhesive layer on one side thereof, wherein the substrate is a rubber-made sheet; a film layer having non-self-adhesive properties and adhesive properties to the pressure-sensitive adhesive layer is formed on the substrate in the side opposite to the pressure-sensitive adhesive layer; and the waterproofing and airtight pressure-sensitive adhesive tape has an elongation at break (distance between two gage marks: 40 mm, drawing rate: 300 mm/min) of from 200 to 1,200% in both the longitudinal direction and the cross direction and a stress under 100% elongation (distance between two gage marks: 40 mm, drawing rate: 50 mm/min) of from 10 to 100 N/cm² in both the longitudinal direction and the cross direction.

Claims

1. A waterproofing and airtight pressure-sensitive adhesive tape comprising a substrate having a pressure-sensitive adhesive layer on one side thereof, wherein the substrate is a rubber-made sheet;

a film layer having non-self-adhesive properties and adhesive properties to the pressure-sensitive adhesive layer is formed on the substrate in the side opposite to the pressure-sensitive adhesive layer; and

the waterproofing and airtight pressure-sensitive adhesive tape has an elongation at break under conditions of a distance between two gage marks of 40 mm and a drawing rate of 300 mm/min of from 200 to 1,200% in both the longitudinal direction and the cross direction and a stress under 100% elongation under conditions of a distance between two gage marks of 40 mm and a drawing rate of 50 mm/min of from 10 to 100 N/cm² in both the longitudinal direction and the cross direction.

2. The waterproofing and airtight pressure-sensitive adhesive tape according to claim 1, wherein the film layer having non-self-adhesive properties and adhesive properties to the pressure-sensitive adhesive layer is formed of a film forming composition containing an acrylic polymer or a long chain alkyl based compound.

3. The waterproofing and airtight pressure-sensitive adhesive tape according to claim 2, wherein the acrylic polymer capable of forming a film layer having non-self-adhesive properties and adhesive properties to the pressure-sensitive adhesive layer is an alkyl (meth)acrylate based polymer containing at least an alkyl (meth)acrylate as a monomer component.

4. The waterproofing and airtight pressure-sensitive adhesive tape according to any one of claims 1 to 3, wherein the rubber-made sheet is constituted of a rubber composition containing a synthetic rubber as the major component.

5. The waterproofing and airtight pressure-sensitive adhesive tape according to claim 4, wherein the synthetic rubber of the rubber-made sheet is at least one synthetic rubber selected from a butyl rubber, an ethylene-propylene rubber, and an ethylene-propylene-diene rubber.