Patent ID: 7846281
Filing Date: 2010-12-07
Classification: B05B,B29C,B32B,C08L,C09J,Y10T

Abstract:
1. A method of applying foamed adhesive to a substrate, comprising the steps of: (a) supplying ingredients comprising an adhesive and a gas to a plurality of nozzle chambers of a nozzle array; (b) causing at least portions of the adhesive and the gas to mixingly interact in the chambers to form a foamed adhesive in the absence of mechanical mixing; and (c) dispensing the foamed adhesive from the nozzle array onto the substrate; wherein the ratio of (i) the pressure of the gas supplied to the nozzle chambers to (ii) the pressure of the adhesive supplied to the nozzle chambers is in the range of from about 0.25:1 to about 2:1, with the proviso that the pressure of the gas supplied to the nozzle changers is no more than about 50 psi (350 kPa).