US 12,065,589 B2
Apparatus and method for applying a foaming reaction mixture onto a laminator
Mirella Coroneo, Correggio (IT); Roberto Rossi, Correggio (IT); and Andrea Benvenuti, Correggio (IT)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/638,884
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Aug. 14, 2020, PCT No. PCT/US2020/046289
§ 371(c)(1), (2) Date Feb. 28, 2022,
PCT Pub. No. WO2021/045888, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 102019000015378 (IT), filed on Sep. 2, 2019.
Prior Publication US 2022/0356382 A1, Nov. 10, 2022
Int. Cl. C09J 175/04 (2006.01); B29C 44/28 (2006.01); B29C 44/32 (2006.01); B29C 44/46 (2006.01); B29C 44/52 (2006.01); B29K 75/00 (2006.01)
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
OG exemplary drawing
 
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.