Stock material or miscellaneous articles – Hollow or container type article – Cellular material derived from plant or animal source
Patent
1974-11-21
1976-08-03
McCamish, Marion E.
Stock material or miscellaneous articles
Hollow or container type article
Cellular material derived from plant or animal source
156209, 156272, 264284, 428167, 428172, 428195, B32B 300
Patent
active
039730638
ABSTRACT:
There is provided a laminate of at lest two thermoplastic films which has a plurality of embossed parallel ribs running in at least one direction, said films being blocked together at spaced apart spots along each rib. Such laminate is prepared by passing at least two thermoplastic films in a superimposed and contacting engagement with one another through the nip of a pair of rollers. One roller is provided with a plurality of parallel raised ribs running in one direction and the other roller is provided with a plurality of parallel raised ribs which run in a direction angled to the direction of the ribs on the first roller. At the locations where the ribs on each roller cross at the nip, the films in the laminate are blocked together but otherwise remain unattached. Such laminates have exceptionally high tear strength and added stiffness and are adapted for various uses, including heavy duty bags and grocery sacks.
REFERENCES:
patent: 2633442 (1953-03-01), Caldwell
patent: 3011930 (1961-12-01), Dworak
patent: 3081571 (1963-03-01), Dayen et al.
patent: 3308227 (1967-03-01), Power et al.
patent: 3466212 (1969-09-01), Clayton et al.
patent: 3507943 (1970-04-01), Such et al.
patent: 3516887 (1970-06-01), Jones
patent: 3743172 (1973-07-01), Ackley et al.
Huggett Charles A.
McCamish Marion E.
Mobil Oil Corporation
Thibodeau P. J.
Trigg Hastings S.
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