摘要:
A grained artificial leather comprised of a sheet-form fibrous base, a porous polyurethane layer having interconnected open cells, formed on at least one surface of the base, and a non-porous polyurethane film formed on the porous polyurethane layer. A multiplicity of open cells are interspersed in the porous polyurethane layer, part of which are closed by the non-porous polyurethane film and the remainder of which are not closed and at least 70% in number of the non-closed opening cells have a diameter of 1-25 .mu.m.The artificial leather is made by adhering the porous polyurethane layer to the sheet-form fibrous base, applying a polyurethane/solvent mixed liquid as dots interspersed on the surface of the polyurethane layer to develop a multiplicity of open cells on the surface, and then applying a finishing polyurethane on the open cell-developed surface.
摘要:
A nonwoven fabric made of filaments, which comprises filaments formed from a fiber-forming thermoplastic polymer and satisfies all of the following conditions (A) to (D). (A) The fiber bundles are present in a range of 5-70 per centimeter in any cross-section parallel to the direction of thickness of the nonwoven fabric. (B) The total area occupied by the fiber bundles is in a range of 5-70% of the cross-sectional area of any cross-section perpendicular to the direction of thickness of the nonwoven fabric. (C) The apparent density is 0.10-0.50 g/cm3. (D) The cut ends of the fibers on the nonwoven fabric surface are present in a range of 5-100 per mm2 of surface area.
摘要翻译:由长丝制成的无纺布,其包含由成纤热塑性聚合物形成的长丝,并且满足以下所有条件(A)至(D)。(A)纤维束的存在范围为5-70厘米 在与无纺布的厚度方向平行的任何横截面中,(B)纤维束占据的总面积在垂直于无纺布的任何横截面的横截面面积的5-70%的范围内 无纺布的厚度方向(C)表观密度为0.10〜0.50g / cm 3(D)无纺织物表面的纤维的切割端以5〜100个/ mm <2>的表面积。
摘要:
A high permeability alloy having an excellent wear resistance, comprising 3-10 wt % of Al, 4-11 wt % of Si, 2.1-20.0 wt % of Ru and the balance Fe, and further containing or not containing 0.01-1.0 wt % of at least one element selected from a group consisting of rare earth elements, Zr and Nb, and/or 0.2-0.5 wt % of Ti, or 0.5-20.0 wt % of Cr.
摘要:
A leathery sheet material which comprises a fibrous mat and a polyurethane composition applied all over the mat in an amount of 10 to 80% by weight based on the total weight of the mat and the polyurethane composition. The polyurethane composition contains 0.1 to 5.0% by weight of a surface active agent having a molecular weight of 2,500 to 30,000 which comprises a hydrophilic component and a hydrophobic component being combined by a urethane bond and/or an amide bond. The hydrophilic component is polyethylene oxides comprising 30 to 80% by weight of the surface active agent and the hydrophobic component is a member selected from the group consisting of a polyalkylene oxides excepting polyethylene oxides, aliphatic polyesters and mixtures thereof. The leathery sheet material has excellent flexibility, excellent antistatic properties and excellent soil resistance.