| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a self-adhesive layer excellent in air-permeability, self-adhesion and coating workability. <P>SOLUTION: The self-adhesive layer is formed by coating a bubble-containing self-adhesive composition on a base material and then drying the coated composition, the bubble-containing self-adhesive composition being prepared by mixing and dispersing a gas into a self-adhesive composition and having density of 0.3-0.97 g/mL. In the self-adhesive layer, an average bubble particle number obtained by the following microscope measurement is 5-100 pieces. <Microscope measurement> A surface of the self-adhesive layer is observed by a microscope, a bubble particle number existing within a sample circle that is picked up from an area of an A4 sheet size at random and has an area of 6 mm<SP POS="POST">2</SP>is counted, and an average value of the numbers of bubble particles within five sample circles is computed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
