| 摘要 |
<p>PURPOSE:To prevent pressure decrease in a gas chamber by constituting a bladder of a polyvinyl alcohol resin having a gas permeation resistance as well as including 15-50wt.% of polyole platicizing agent and a rubber resilient layer provided on one side thereof. CONSTITUTION:A rubber resin layer 11 is laminated by means of an adhesive agent so as to constitute a bladder 2, on both sides of resin layer 12 made of polyvinyl alcohol resin having gas permeation resistance while including 15-50wt. of polyole placiticizer such as glyceline. This constitution prevents pressure decrease in a gas chamber (a) due to its gas permeation resistance.</p> |
