Process for the preparation of phenolic foam

Details Process for the preparation of phenolic foam Process for the preparation of phenolic foam

1985-02-20

1987-03-10

Dawson, Robert A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156549, 264 462, 425115, 425224, 425817C, B32B 3106

Patent

active

046489223

ABSTRACT:
The present invention relates to a process and an apparatus for producing phenolic foam laminates with improved surface appearance. The process involves applying pressure on the foam forming mixture through one of its facings by a flexible member. The member is sufficiently flexible to allow continual rise of the foam but also smoothes out any uneven rise under the applied pressure thereby producing a laminate which has a surface immediately below the facing substantially free of any voids, craters or wrinkles.

REFERENCES:
patent: 3215581 (1965-11-01), Carlson et al.
patent: 4267134 (1981-05-01), Kolakowski et al.
patent: 4347281 (1982-08-01), Futcher et al.
patent: 4501794 (1985-02-01), Blackwell et al.

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