Process for making urea-formaldehyde insulation

Details Process for making urea-formaldehyde insulation Process for making urea-formaldehyde insulation

1980-02-08

1981-09-22

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521136, 521187, 521188, C08J 936

Patent

active

042911281

ABSTRACT:
A process and apparatus are provided for making desired shapes of urea-formaldehyde suitable for use as insulation from urea-formaldehyde foam. Fluid urea-formaldehyde foam (A) is formed into discrete particles (A') in particle generator (10) which also partially cures particles (A'). After particles (A') are fully cured, they are blended with fluid urea-formaldehyde foam in mixing apparatus (11) which includes blending head (66) to produce mixture (C) which is a coherent mass. Mixture (C) is molded to the desired cross-sectional shape by molding conveyor (12). Cutter (132) cuts formed mixture (C) into the desired length. Thereafter oven (146) is utilized for fully curing the product which is then enclosed in a suitable packaging material.

REFERENCES:
patent: 2664406 (1953-12-01), Armstrong
patent: 2806509 (1957-09-01), Bozzacco et al.
patent: 3256218 (1966-06-01), Knox
patent: 3290260 (1966-12-01), Buccigross
patent: 3957700 (1976-05-01), Ferriday et al.
patent: 3957701 (1976-05-01), Cutler et al.

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