Process for releasing laminates

Details Process for releasing laminates Process for releasing laminates

1979-11-13

1981-01-06

Massie, Jerome W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

106 2, 156289, 156323, 156344, 428530, 428537, 428318, 1563073, B32B 3112, B32B 3120

Patent

active

042434610

ABSTRACT:
A novel method of releasing from one another in a press pack, a plurality of back-to-back heat and pressure consolidated resin-impregnated laminates, e.g. decorative laminates, metal clad laminates, veneer backs and the like, which method comprises utilizing, as a separator sheet, a web of phenol-formaldehyde resin-free paper having a water absorption of at least about 200 seconds which has been sized on at least one side thereof, from an aqueous mixture, a water-soluble, alkaline earth or earth metal salt, e.g. a calcium salt such as calcium chloride, then coated on said sized side with a film of a mixture of a salt of alginic acid, such as sodium alginate, and either (1) a triglyceride or (2) hydrolyzed or non-hydrolyzed lecithin.

REFERENCES:
patent: 3050434 (1962-08-01), Emily et al.
patent: 3215579 (1965-11-01), Hagen
patent: 3438794 (1969-04-01), Ritson et al.
patent: 3803068 (1974-04-01), Mestetsky et al.
patent: 4166150 (1979-08-01), Mattor et al.

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