Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1977-12-21
1978-12-12
Lowe, James B.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
264146, 264147, 264342RE, 264DIG47, B29D 702, B29C 1714
Patent
active
041296320
ABSTRACT:
Film extrusion-fibrillation and film extrusion-narrow slitting processes for preparing fibrillated or narrow-width thermoplastic tape. The process is characterized by conducting the extrusion-orientation stage and the slitting or fibrillation stage as separate operations, thereby minimizing process disruptions caused by film defects and breakage, and further characterized by certain film shrinkage and heat treatment modifications which facilitate such separate stage operation. The fibrillated tapes can be twisted into cordage products. The narrow-width tapes are used to make carpet backing and indoor-outdoor carpet.
REFERENCES:
patent: 3308215 (1967-03-01), Lost
patent: 3402548 (1968-09-01), Wininger, Jr. et al.
patent: 3550826 (1970-12-01), Salmela
patent: 3639573 (1972-02-01), Port
patent: 3645299 (1972-02-01), Eichler et al.
"Can Computer-Controlled Extrusion Help?", L. L. Scheiner, Plastics Technology, Feb. 1974, pp. 43-49.
Olson Carl B.
Parker Phillip H.
Weisner Carl S.
Chevron Research Company
DeJonghe T. G.
Lowe James B.
Newell Dix A.
Squires Lawrence S.
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