Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Reshaping running or indefinite-length work
Patent
1977-01-10
1978-07-18
Kucia, Richard R.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Reshaping running or indefinite-length work
264210R, 264289, B29C 2400
Patent
active
041016254
ABSTRACT:
A method in which a band formed of essentially unoriented thermoplastic polymeric material is provided with a transverse cross-section which is of corrugated configuration and is generally uniform in thickness, with at least portions of such band being compressed so as to orient polymer molecules in the transverse direction of the band, afterwhich the band is elongated to orient polymer molecules thereof also and predominantly in the longitudinal direction of the band. The resulting strapping possess a high tensile strength, improved resistance to longitudinal splitting, good longitudinal stiffness, a reduced tendency to shell when wound as a roll, reduced surface abrasion during transit through strapping equipment and provides for high strength heat seals.
REFERENCES:
patent: 3104937 (1963-09-01), Wyckoff
patent: 3283378 (1966-11-01), Cramton
patent: 3447207 (1969-06-01), Danzer
patent: 3558580 (1971-01-01), Orser
patent: 3651196 (1972-03-01), Starkweather
patent: 3800008 (1974-03-01), Starkweather
FMC Corporation
Horsky Eugene G.
Kucia Richard R.
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