Waterproofing and airtight pressure-sensitive adhesive tape

• US 7,351,472 B2
• Filed: 10/21/2004
• Issued: 04/01/2008
• Est. Priority Date: 10/22/2003
• Status: Active Grant

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: Munakata, Yasunori, Inagaki, Sadayuki, Ishikawa, Masayuki
• Primary Examiner(s): Cole; Elizabeth M.
• Assistant Examiner(s): Desai; Anish
• Application Number:
  US10/969,070
• Publication Number:
  US 20050106387A1
• Time in Patent Office: 1,258 Days
• Field of Search: 428/343, 428/351, 428/354, 428/355.R, 428/40.1, 428/356, 428/355.BL
• 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 butyl rubber-based pressure-sensitive adhesive layer on one side thereof, wherein the substrate is a sheet made of an unvulcanized rubber containing a butyl rubber;

a film layer having non-self-adhesive properties and adhesive properties to the pressure-sensitive adhesive layer comprising a polybutyl methacrylate or an octadecyl methacrylate-acrylonitrile copolymer 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.