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.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156500, 156578, 222146HE, 222251, 261 28, 261DIG26, 264 54, 264321, 425 4C, 428310, B32B 518

Patent

active

040594661

ABSTRACT:
A novel method and apparatus are disclosed for manufacturing a novel adhesive product. The product is a pair of substrates adhered together by compressed hot melt adhesive foam. The foam is created by first mixing a chemical blowing agent, such as powdered azodicarbonamide, into the solid hot melt adhesive at a temperature below the decomposition temperature of the blowing agent. Subsequently, the solid adhesive and powdered blowing agent are heated to a temperature above the melting temperature of the solid adhesive and above the decomposition temperature of the blowing agent while confining the molten mixture under pressure in order to force the gas generated by the decomposition of the blowing agent 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: 3662927 (1972-05-01), Cocks
patent: 3758001 (1973-09-01), Callan
patent: 3855378 (1974-12-01), Topcik
patent: 3891362 (1975-06-01), DeVita
patent: 3945535 (1976-03-01), Leiste et al.
patent: 3959049 (1976-05-01), Tanaka et al.
patent: 3962387 (1976-06-01), Hendry
patent: 3975473 (1976-08-01), Mulvaney

Affiliated with

Also associated with

Rating

Hot melt thermoplastic adhesive foam system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hot melt thermoplastic adhesive foam system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hot melt thermoplastic adhesive foam system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2257270