Patent ID: 6136123
Filing Date: 2000-10-24
Classification: B60C,C08G,C08J,C09J

Abstract:
In a process for producing a pneumatic tire having an inner tire member containing a rubber component and, as an air permeation preventive layer, a strip-shaped single-layer or multiple layer film, said film extending circumferentially around and having one surface in contact with an inner side of said tire member, said film further having a joining portion where facing portions on two ends of the strip-shaped film meet and overlap to form said layer, the improvement comprising:said strip-shaped film being composed of an elastomer dispersed in a continuous thermoplastic resin and applying to at least a part of the facing portions of said ends at the joining portion of said strip-shaped film and to at least a part of said one surface of said film a tackifier-adhesive composition containing a polymer component, said polymer component of said tackifier-adhesive composition having a critical surface tension difference with the rubber component of the tire member and with said one surface of the film of not more than 3 mN/m, wherein the tackiness between both the facing portions of said two ends of the strip-shaped film at the joining portion of the film and between said one surface of the film and the rubber component of the tire member is from 5 to 30N as determined from a sample having a width of 12.7 mm.