Porous laminar pellets of waste poly(ethylene terephthalate) fil

Details Porous laminar pellets of waste poly(ethylene terephthalate) fil Porous laminar pellets of waste poly(ethylene terephthalate) fil

1976-04-12

1978-05-30

Danison, Walter C.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

260 23, 260 75T, 264140, B32B 516, C08J 1104

Patent

active

040924580

ABSTRACT:
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.

REFERENCES:
patent: 3535408 (1970-10-01), Ronden
patent: 3767601 (1973-10-01), Knox
patent: 3804811 (1974-04-01), Rose et al.
patent: 3840632 (1974-10-01), Maxion et al.
patent: 3949039 (1976-04-01), Yamamoto et al.
Modern Plastics, Jun. 1964, p. 54.

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