| abstract |
PROBLEM TO BE SOLVED: To use a microporous polyolefin film having moisture permeability and various breathable substrates (nonwoven fabric, woven fabric, split fabric, mesh, net, felt, paper, fabric, etc.) using a hot melt adhesive. And a method for producing a moisture-permeable laminated sheet having waterproofness, weather resistance and heat resistance, and a hot melt adhesive suitably used for the lamination. A styrene-based block copolymer-containing hot melt adhesive having a melt viscosity of 100,000 mPa · s or higher at a temperature of 90 ° C. measured under specific conditions has a melt viscosity of 50,000 mPa · s under the above conditions. The adhesive is used in the molten state as described below, and adheres the microporous polyolefin film and the breathable base material, and has such characteristics. [Selection figure] None |