Apparatus and method for blending and dispensing foamable, curab

Details Apparatus and method for blending and dispensing foamable, curab Apparatus and method for blending and dispensing foamable, curab

1993-01-04

1993-10-12

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 91, 521110, 521917, C08J 902

Patent

active

052526275

ABSTRACT:
An apparatus for preparing foams exhibiting a uniformly small cell size, a minimum number of ruptured cell walls and a smooth surface from foamable curable compositions comprises means to transport the ingredients of a foamable, curable composition to the input of a static mixer in which the ingredients of the composition are blended to homogeneity prior to being extruded into an exit zone and through an exit orifice. The length to diameter ratio of the mixing zone and the diameter of the exit orifice are within specified ranges.

REFERENCES:
patent: 3923705 (1975-12-01), Smith
patent: 4599367 (1986-07-01), Bauman et al.
patent: 4778631 (1988-10-01), Cobbs, Jr. et al.
patent: 4888217 (1989-12-01), Jones
patent: 5079292 (1992-01-01), Hoffman et al.
patent: 5082142 (1992-01-01), Saidman et al.
"A Guide To Static Mixers" (Plastics World, May 1992, pp. 63-66).

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