CPC C09J 175/04 (2013.01) [B29C 44/28 (2013.01); B29C 44/321 (2016.11); B29C 44/461 (2013.01); B29C 44/52 (2013.01); B29K 2075/00 (2013.01)] | 8 Claims |
1. A process for making a laminated panel, comprising
I. combining components comprising at least one polyisocyanate, at least one physical blowing agent, at least one polyol and at least one catalyst in a mixing zone of a mixhead to form a reactive foam formulation;
II. continuously dispensing the reactive foam formulation onto a moving bottom facing layer to form a layer of reactive foam formulation on the bottom facing layer and
III. curing the layer of reactive foam formulation on the bottom facing layer to form a laminated panel comprising the bottom facing layer and a polymer foam layer bonded to the bottom facing layer; and
IV. observing the layer of reactive foam formulation and/or the polymer foam layer for the presence of surface bubbles on a top surface of the layer of the reactive form formulation and/or the polymer foam layer, and when surface bubbles are observed, increasing backpressure in the mixing zone of the mixhead to reduce or eliminate the further formation of surface bubbles.
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