Document Type and Number:
Japanese Patent JPS5231782
Kind Code:
B1
Abstract:
1306379 Porous coated sheet materials KANEGAFUCHI BOSEKI KK 22 Sept 1970 [27 Sept 1969] 45180/70 Heading B2E A permeable lining for shoes comprises a first layer of porous polyurethane resin applied to a second layer of needle-locked fibre web, the porous layer including macropores having been hot compressed thereon to a thickness of 50-70% of an original uncompressed thickness of 0.1-0.8 mm thereby forming depressed pores elongated in a direction parallel to the surface of the first layer, the longitudinal dimension being 20-50% of the thickness of the compressed porous layer, the ratio of the longitudinal to the transverse dimension being 1:1.2 to 1:1.6. The porous layer may be provided by applying a coating solution prepared by adding a water-soluble pore forming agent to a synthetic resin solution to the surface of the substrate, and immersing the coated substrate in an aqueous coagulating solution to extract the synthetic resin solvent and the pore forming agent. Suitable water-soluble pore forming agents are sodium chloride, sodium sulphate and ammonium sulphate, polyethylene glycols. The needle-locked fibre web may be impregnated with a synthetic resin or synthetic rubber. The hot compression may be carried out with a smooth-surface to form a perfectly smooth surface, or with an embossed roller to produce a smooth-embossed surface. The Examples relate to forming porous layers on a fibre web comprising polyester fibres and viscose rayon staple fibres subject to needlelocking and impregnation with a styrenebutadiene rubber emulsion.
Application Number:
JP7727469A
Publication Date:
August 17, 1977
Filing Date:
September 27, 1969
Export Citation:
International Classes:
A43B1/10; A43B21/22; A43B23/02; C08J9/36; D06N3/00; (IPC1-7): A43B1/14; D06N3/14