Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Direct application of fluid pressure
Patent
1995-04-20
1997-02-25
Thurlow, Jeffrey R.
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Direct application of fluid pressure
264459, 264471, 264473, 264 37, 26417128, 26417314, 26417315, 264230, 264DIG69, B29C 3510
Patent
active
056056605
ABSTRACT:
A process for the manufacture of a multilayer, cross-linked, heat shrinkable, polyolefin film, the film having at least one inner layer including a thermoplastic polymer sandwiched between two outer layers including a thermoplastic polymer different from the thermoplastic polymer of the inner layer, including the steps of coextruding the polymers into a tape; cross-linking the tape; and converting the cross-linked tape into a heat shrinkable film by orientation; wherein scrap material produced in the manufacture of the heat shrinkable film is incorporated by recycling the film into the coextrusion step in an amount up to 50% by weight of the total film weight.
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Buongiorno Livio
Ciocca Paolo
Quatt Mark B.
Thurlow Jeffrey R.
W. R. Grace & Co.,-Conn.
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