MULTILAYER POLYVINYL ACETAL FILM HAVING IMPROVED SOUND INSULATION AND PREPARATION METHOD THEREOF,申请号KR20110114074-传众专利搜索

MULTILAYER POLYVINYL ACETAL FILM HAVING IMPROVED SOUND INSULATION AND PREPARATION METHOD THEREOF

申请公布号：KR20130049046(A)

申请号：KR20110114074

申请日期：2011.11.03

申请公布日期：2013.05.13

申请人：

SKC CO., LTD.

发明人：KIM, KYUNG YOUN;SONG, KYOUNG SOO;CHUNG, SUNG JIN;KIM, SANG MOOK;KIM, HEY JIN

分类号：B32B27/08;C08J5/18;C08L29/14;C08L33/12

主分类号：B32B27/08

摘要：PURPOSE: A multi layer polyvinyl acetal film and a manufacturing method thereof are provided to maintain excellent puncture prevention performance and impact resistance even in hot and humid environment, thereby showing excellent performance by being used as a bonding film for glasses for a vehicle and a building. CONSTITUTION: A multi layer polyvinyl acetal film has a structure in which a first resin layer and a second resin layer are alternately laminated. The first resin layer and the second resin layer respectively include a polyvinyl acetal resin, polymethylmethacrylate, and a resin which is selected by blending the polyvinyl acetal resin and the polymethylmethacrylate. At least one resin layer between the first resin layer and the second resin layer includes the polyvinyl acetal resin. A difference of a refractive index between the first and the second resin layer is 0.08 or less.