Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1996-03-04
1996-12-31
Michl, Paul R.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
264230, 264349, 524114, D01F 102
Patent
active
055891268
ABSTRACT:
This invention relates to polyester/plasticizer blends which are useful as heat-shrinkable films or sheet in low temperature shrink packaging applications. The plasticizer is injected into the melt of the polyester. The plasticizer lowers the glass transition temperature, on-set temperature and shrink rate of the polyester. Film or sheet produced by the polyester/plasticizer blends is clear.
REFERENCES:
patent: 4059667 (1977-11-01), Pangonis
patent: 4963418 (1990-10-01), Isaka et al.
patent: 4996291 (1991-02-01), Yoshinaka et al.
Light Ronald R.
Shih Wayne K.
Eastman Chemical Company
Gwinnell Harry J.
Michl Paul R.
Rajguru U. K.
Thallemer John D.
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