| 摘要 |
<p>PURPOSE:To improve the adhesion against polar oil liquid or the like by laminat ing together a PVA film and an unvulcanized rubber sheet acetalized by unsatu rated aldehyde. CONSTITUTION:On an acetalized PVA film obtained as approximately 3-30 equivalent % mol. of acetalization degree by unsaturated aldehyde such as crotonaldehyde and acrolein, vulcanizing agent blended diene rubber or butyl rubber is applied as an organic solvent solution of the unvulcanized rubber and then dried, and thereafter an unvulcanized rubber sheet is superimposed thereon for effecting vulcanizing adhesion. The unvulcanized rubber employed herein for respectively forming the organic solvent solution and sheet is preferable to be the same kind in general, however, another kind is available if it has a co-bridging property.</p> |
