Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1983-11-02
1986-04-29
Dawson, Robert A.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
53478, 53487, 53488, 156216, 156224, 215232, 215326, 215DIG2, 428 64, 428352, 428354, 428514, 493109, 493114, B32B 3112
Patent
active
045854971
ABSTRACT:
The present invention relates to a glue-free method for sealing closures to paperboard food containers, and also to the novel closures for such method. The present invention is particularly applicable to containers for moisture sensitive food items such as salt, and is characterized in the use of a thermoplastic vinyl chloride ethylene copolymer which functions both to provide a heat seal and effective resistance to moisture vapor transmission. The copolymer has sufficient slip to permit handling of the closures in automatic forming and heat sealing equipment.
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Air Products and Chemicals Bulletin, "Airflex Ethylene-Vinyl Chloride (EVC) Emulsions for Specialty Paper", 8 pages (1981).
Allied Paper Incorporated
Dawson Robert A.
Thomas Richard H.
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