| abstract |
The present invention provides a method for easily producing an interlayer film for laminated glass having a three-layer structure of EVA layer / PVB layer / EVA layer excellent in transparency, adhesiveness, sound insulation, penetration resistance and impact resistance. . SOLUTION: Two laminated EVA sheets of a resin composition containing an ethylene / vinyl acetate copolymer and an organic peroxide are pressed and laminated through a PVB sheet of a resin composition containing polyvinyl butyral. In the method for producing an interlayer film, in the above process, the resin composition containing polyvinyl butyral is heated and extruded from a T-die into a sheet shape, and then the obtained softened PVB sheet is conveyed between a pair of rolls. A method for producing an interlayer film for laminated glass, wherein the interlayer film is inserted between EVA sheets. [Selection] Figure 1 |