초록 ▼

To provide a method of producing a nonwoven fabric for artificial leather and substrate for artificial leather which is capable of providing the substrate for artificial leather having a sufficient shape stability by producing the nonwoven fabric for artificial leather without causing serious damage

To provide a method of producing a nonwoven fabric for artificial leather and substrate for artificial leather which is capable of providing the substrate for artificial leather having a sufficient shape stability by producing the nonwoven fabric for artificial leather without causing serious damages to the scrim. A method of producing a nonwoven fabric for artificial leather, including a step of entanglement for uniting superposed fiber web and scrim by a needle punching, wherein the needle punching is performed in a manner satisfying the following formulae 1 and 2: description="In-line Formulae" end="lead"S1P≦S1/cos( D1��(π/180)) (1)description="In-line Formulae" end="tail" description="In-line Formulae" end="lead"S2P≦S2/cos( D2��(π/180)) (2)description="In-line Formulae" end="tail" wherein S1 is a diameter of warps constituting the scrim, S2 is a diameter of wefts constituting the scrim, D1 is an angle between the warps and barbs which penetrate the scrim, D2 is an angle between the wefts and barbs which penetrate the scrim, and P is a total barb depth of the barbs.

대표청구항 ▼

What is claimed is: 1. A method of producing a nonwoven fabric for artificial leather, comprising a step of entanglement for uniting superposed fiber web and scrim by a needle punching, wherein the needle punching is performed in a manner satisfying the following formulae 1 and 2: description="In

What is claimed is: 1. A method of producing a nonwoven fabric for artificial leather, comprising a step of entanglement for uniting superposed fiber web and scrim by a needle punching, wherein the needle punching is performed in a manner satisfying the following formulae 1 and 2: description="In-line Formulae" end="lead"S1P≦S1/cos(D 1��(π/180)) (1)description="In-line Formulae" end="tail" description="In-line Formulae" end="lead"S2P≦S2/cos(D 2��(π/180)) (2)description="In-line Formulae" end="tail" wherein S1 is a diameter of warps constituting the scrim, S2 is a diameter of wefts constituting the scrim, D1 is an angle between the warps and barbs which penetrate the scrim, D2 is an angle between the wefts and barbs which penetrate the scrim, and P is a total barb depth of the barbs. 2. The method according to claim 1, wherein a number of twists is 0 to 1000 T/m for each of the warps and wefts. 3. The method according to claim 1, wherein the fiber web contains fibers capable of forming superfine fibers with a fineness of 0.5 dtex or less. 4. The method according to claim 1, wherein the scrim contains fibers capable of forming superfine fibers with a fineness of 0.5 dtex or less. 5. A method of producing a substrate for artificial leather, which comprises the method of claim 1 and further comprising a step of impregnating an elastic polymer to the nonwoven fabric. 6. A method of producing a substrate for artificial leather, which comprises the method of claim 3 and further comprising a step of impregnating an elastic polymer to the nonwoven fabric before or after converting the fibers capable of forming superfine fibers to superfine fibers. 7. A method of producing a suede artificial leather, which comprises the method of claim 6 and further comprising a step of napping at least one surface of the substrate for artificial leather.