The hot melt adhesive powder dispersion liquid for spray application, the thermal adhesiveness sheet, the interior material, being the dispersion liquid which the powder of the hot melt adhesive

摘要

PROBLEM TO BE SOLVED: To obtain a hot-melt adhesive powder dispersion in which a hot-melt adhesive powder hardly settles and which gives uniform-quality products by adding an acrylic copolymer of an alkali thickening type as a thickener to a dispersion prepared by dispersing a hot-melt adhesive powder in water. ;SOLUTION: This hot-melt adhesive powder dispersion is prepared by dispersing 1-60 wt.% hot-melt adhesive powder comprising e.g. a polyolefin resin and having a particle size of 50-300 mesh and 0.1-10 wt.% acrylic copolymer [e.g. an ethyl acrylate/methacrylic acid (6/4) copolymer] emulsion in water and adding an alkali (e.g. ammonia) to the resultant dispersion to adjust the pH to 6-9 to thereby increase the viscosity at 25°C to 50-2,000 cP. If necessary, this dispersion is compounded with additives such as a surfactant an antioxidant, a filler and a softener, The dispersion is air-sprayed on one side of a substrate (e.g. a woven or nonwoven polyester fabric) in a coating wt. (solid basis) of 1-100 g/m2 and dried to give a thermal adhesive sheet.;COPYRIGHT: (C)2000,JPO