Method for producing polyethylene terephthalate packing material

Details Method for producing polyethylene terephthalate packing material Method for producing polyethylene terephthalate packing material

1982-04-28

1984-05-29

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264178F, 2642107, 2642108, 2642356, 264284, 2642896, 528272, B29D 724

Patent

active

044514220

ABSTRACT:
A polyethylene terephthalate packing band is provided which is made of a polyethylene terephthalate resin having an intrinsic viscosity of 0.90 to 1.20 and has been longitudinally stretched to an overall draft of 3 to 6 times. There is also provided a packing band of the above construction in which the longitudinal orientation of the resin molecules has been randomized by embossing. There is further provided a method by which the above-mentioned packing band is efficiently manufactured.

REFERENCES:
patent: 3432591 (1969-03-01), Heffelfinger
patent: 3447207 (1969-06-01), Danzer
patent: 3461199 (1969-08-01), Campbell
patent: 3739056 (1973-06-01), Evans et al.
patent: 3842152 (1974-10-01), Witfield, Jr. et al.
patent: 3966867 (1976-06-01), Munting
patent: 4022863 (1977-05-01), Karass et al.
patent: 4042569 (1977-08-01), Bell et al.
patent: 4101625 (1978-07-01), Haley

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