发明名称 Porous laminar pellets of waste poly(ethylene terephthalate) film, and processes for drying and polymerization
摘要 Porous laminar pellets of comminuted crystalline poly(ethylene terephthalate) waste film are formed. The pellets do not contain a binder, but are coherent since the polymer flakes making up the pellets are mechanically interlocked or intertwined. Rapid drying and solid state polymerization rates are achieved, and the pellets have sufficient structural integrity to survive such processes, but may be readily disintegrated upon completion of such processes if so desired. The pellets are also well adapted for dissolution, such as in glycol monomer for glycolysis, and in molten polymer.
申请公布号 US4092458(A) 申请公布日期 1978.05.30
申请号 US19760676141 申请日期 1976.04.12
申请人 E. I. DU PONT DE NEMOURS AND COMPANY 发明人 HOFFMAN, FRANK EDWARD
分类号 B29B9/00;B29B17/00;(IPC1-7):B32B5/16;C08J11/04 主分类号 B29B9/00
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