Method for irradiation of polymeric laminates and product

Details Method for irradiation of polymeric laminates and product Method for irradiation of polymeric laminates and product

1980-09-30

1982-11-30

Hoag, Willard E.

Stock material or miscellaneous articles

Three dimension imitation or 'treated' natural product

Flora

1562755, 264 22, 264171, 264248, 2801545R, B29C 2702, B29D 910

Patent

active

043616062

ABSTRACT:
Three-dimensional laminates having improved ductility and resistance to cracking at low temperatures are produced by subjecting the formed laminates to high energy ionizing radiation to preferentially promote crosslinking in at least one layer of the laminate which layer per se has poor low temperature properties. In the preferred form a laminate useful in producing spray reducing rain flaps for vehicle tires is provided by irradiating a fusion bonded laminate comprising a three-dimensional grasslike layer of high melt index, low density polyethylene and a high density polyethylene substrate at an average dose of at least about 10 and preferably about 30 megarads. The resulting rain flap remains ductile at temperatures down to at least about minus 20.degree. F. (minus 29.degree. C.) and preferably minus 40.degree. F. (minus 40.degree. C.).

REFERENCES:
patent: 2936261 (1960-05-01), Cole
patent: 2940869 (1960-06-01), Graham
patent: 3507010 (1970-04-01), Doleman et al.
patent: 3590109 (1971-06-01), Doleman et al.
patent: 3663662 (1972-05-01), Golike et al.
patent: 3899192 (1975-08-01), Reddaway
patent: 4101699 (1978-07-01), Stine et al.
patent: 4147291 (1979-04-01), Akao et al.
patent: 4214030 (1980-07-01), Rakes et al.
Gould et al., Irradiation of Polymers, A.C.S., Washington, D.C., (1967), pp. 139-155.
Anon., Package Engineering, Jan. 1980, pp. 12-13.

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