초록 ▼

An apparatus suitable for the continuous preparation of a polymer-based cellular foam sheet of a predetermined thickness wherein the foam is produced from a reaction product capable of curing at ambient temperature formed by the reaction of a reactant composition including a prepolymer and water, th

An apparatus suitable for the continuous preparation of a polymer-based cellular foam sheet of a predetermined thickness wherein the foam is produced from a reaction product capable of curing at ambient temperature formed by the reaction of a reactant composition including a prepolymer and water, the apparatus including: a means for reacting the reactant composition, a continuously moving substrate for receiving a quantity of the reaction product; a means for depositing the quantity of reaction product onto the substrate to form a rising foam sheet; a means for compressing the rising foam sheet to a predetermined degree, the compressing means being spaced from the depositing means; and a curing means spaced from the compressing means and providing for a rising of the foam sheet exiting from the compressing means to provide a porous foam sheet having the predetermined thickness.

대표청구항 ▼

[ We claim as our invention:] [1.] A polymer-based open-celled porous cellular foam of a predetermined thickness prepared by a method comprising the steps of:(a) depositing a reaction product formed from the reaction of a reactant composition comprising a urethane prepolymer and water onto a substra

[ We claim as our invention:] [1.] A polymer-based open-celled porous cellular foam of a predetermined thickness prepared by a method comprising the steps of:(a) depositing a reaction product formed from the reaction of a reactant composition comprising a urethane prepolymer and water onto a substrate in an amount such that the thickness of the reaction product, if allowed to rise to its fullest extent without undergoing compression, would be greater than the predetermined thickness,(b) allowing the reaction product to begin rising to form a rising foam,(c) passing the rising foam through a compression zone wherein the foam is compressed to a predetermined dimension, and(d) removing the foam from the compression zone and allowing the foam to rise to provide a porous cellular foam of the predetermined thickness.