Process and device for uniform distribution of a free-flowing reaction mixture onto a continuously transported substrate

Abstract From the Canadian patent

The present invention relates to a process and a device for uniform distribution of a free-flowing reaction mixture onto a continuously transported substrate over the desired width during production of foam webs. The distribution takes place towards the sides from a feed point by means of air. The simplest method of applying a foamable reaction mixture to a moving substrate is to centrally feed the mixture onto the substrate, which is generally a paper web carried on the conveyor belt, and to allow the reaction mixture simply to run outwards. The paper web prevents the reaction mixture from adhering to the conveyor belt. Generally the film of reaction, mixture which forms is of uneven …