Hot melt thermoplastic adhesive foam system

Details Hot melt thermoplastic adhesive foam system Hot melt thermoplastic adhesive foam system

1976-08-02

1977-11-22

Whitby, Edward G.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

156 78, 156334, 156500, 222146HE, 261 28, 261DIG26, 264 459, 264 464, 428339, 366301, B32B 518

Patent

active

040597148

ABSTRACT:
A novel method and several different unique modifications of apparatus are disclosed for manufacturing a novel adhesive product. The product which results from use of the foam is a pair of substrates adhered together by compressed foam. The adhesive foam is created by intimately mixing air or any relatively inert gas with thermoplastic adhesive while the adhesive is in the liquid state and then pressurizing the liquid/gas mixture so as to force the gas into solution with the liquid adhesive. The liquid adhesive is subsequently dispensed at atmospheric pressure with the result that the gas is released from the solution and becomes entrapped in the adhesive to form a homogenous closed cellular adhesive foam.

REFERENCES:
patent: 2324116 (1943-07-01), Sivertsen
patent: 3415714 (1968-12-01), Hider
patent: 3662927 (1972-05-01), Cocks
patent: 3792801 (1974-02-01), Baker et al.
patent: 3942687 (1976-03-01), Walus et al.
patent: 3945535 (1976-03-01), Leiste et al.

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