Embossing with an endless belt composed of a shape memory alloy

Details Embossing with an endless belt composed of a shape memory alloy Embossing with an endless belt composed of a shape memory alloy

1998-02-02

2000-02-15

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Reshaping running or indefinite-length work

2642102, 264293, 425373, 425385, B29C 5904

Patent

active

060249072

ABSTRACT:
An endless belt composed of a shape memory alloy is used for surface finishing thermoplastic film or sheet as it leaves the die of an extruder, or finishing roll of a calender or some means to heat the surface of the film or sheet to the required softening temperature. Since shape memory alloys have the unique property of increasing in volume as they get colder, instead of decreasing in volume, the tendency of the film or sheet to stick to the endless belt is decreased. This allows for the continuous production of surface finished film or sheet.

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