Process for manufacturing rigid polyisocyanurate foam products

Details Process for manufacturing rigid polyisocyanurate foam products Process for manufacturing rigid polyisocyanurate foam products

1998-04-23

2000-10-31

Cooney, Jr., John M.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 453, 521137, C08G 1804

Patent

active

061403830

ABSTRACT:
A process for manufacturing an insulation board comprising a rigid polyisocyanurate foam core having two major surfaces and a facing material on at least one of the major surfaces, comprising (a) conveying a facing material along a production line for attachment to one major surface of the core; (b) applying a foam-forming mixture of polyisocyanurate to the facing material such that the mixture is applied along the entire width of the facing material; (c) optionally conveying a second facing material along the production line for attachment to the other major surface of the core; (d) conveying the facing material with applied foam-forming mixture into a laminator which comprises a gap for foam expansion and allowing the mixture to foam and expand to fill the gap within the laminator; and (e) curing the foam. The process provides excellent boardstock thickness control, minimal wasted densification at the foam/facer interface, greater compressive strength and high line speed.

REFERENCES:
patent: 4572865 (1986-02-01), Gluck et al.

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