| 摘要 |
PURPOSE:To lessen the penetration of a softener, etc., to the rear side by providing a moisture permeable sheet which is coated with the adhesive consisting essentially of a styrenic block polymer, a tackiness imparting resin and the softener and having a two-phase block structure of styrene and rubber and has a prescribed moisture permeation rate. CONSTITUTION:The moisture permeable sheet having 0.7 to 2.8g/100cm<2>.h moisture permeation is used and the adhesive which consists essentially of the styrenic block polymer (styrene/ethylene/styrene block copolymer), the tackiness imparting resin (C9 peteroleum resin) and the softener (naththenic process oil) and has the two-phase block structure of the styrene phase 1 and the rubber phase 2 is used. The softener, etc., which are the compsn. component of the adhesive are held into the adhesive in this way even if the molecular motion is increased by a temp. rise. The degree at which the 'penetration to the rear side' to bleed out the softener, etc., to the surface of the moisture permeable sheet is lessened from the results of comparative tests. |
