Patent ID: 9260582
Filing Date: 2016-02-16
CPC Classification: B29B,B29K,B29L,B32B,C08J,Y02W

Claim Text:
1. A method of producing poly(vinyl butyral) laminate from a discarded laminated glass, comprising the steps of: providing a discarded laminated glass containing glass and poly(vinyl butyral); breaking the discarded laminated glass into multiple reduced glass fragments, each reduced glass fragment comprising a poly(vinyl butyral) film and at least one glass piece attached onto the poly(vinyl butyral) film, and each poly(vinyl butyral) film of the reduced glass fragment having a total surface area less than 18 square centimeters; washing the reduced glass fragments with water and grinding the reduced glass fragments at a rotation speed ranging from 1400 revolutions per minute (rpm) to 2500 rpm, so as to obtain a poly(vinyl butyral) material substantially free of glass pieces; drying the poly(vinyl butyral) material to obtain a dried poly(vinyl butyral) material and granulating the dried poly(vinyl butyral) material to obtain poly(vinyl butyral) granules; and forming the poly(vinyl butyral) laminate from the poly(vinyl butyral) granules.