Patent application number | Description | Published |
20090053948 | BASE FOR SYNTHETIC LEATHER AND SYNTHETIC LEATHERS MADE BY USING THE SAME - A substrate for artificial leathers, comprising a nonwoven fabric body made of microfine fiber bundles and an elastic polymer impregnated therein. The substrate for artificial leathers simultaneously satisfies the following requirements 1 to 4: (1) each of the microfine fiber bundles contains 6 to 150 bundled microfine long fibers in average; (2) a cross-sectional area of the microfine long fibers constituting the microfine fiber bundles is 27 μm | 02-26-2009 |
20090087618 | BASE MATERIAL FOR ARTIFICIAL LEATHERS AND METHOD OF PRODUCING THE SAME - A substrate for artificial leathers which is composed of a nonwoven fabric made of fiber bundles of microfine fibers having an average single fiber fineness of 0.5 dtex or less and an elastic polymer impregnated into the nonwoven fabric. The substrate for artificial leathers satisfies the following requirements 1 and 2: (1) the number of fiber bundles which are oriented to a thickness direction of the nonwoven fabric is 75 to 300 per 1 cm of width which is perpendicular to the thickness direction, when measured on a cross section parallel to the thickness direction; and (2) the number of cross sections of the fiber bundles which are oriented to the thickness direction is 30 to 800 per 1 mm | 04-02-2009 |
20090124156 | BASE MATERIAL FOR ARTIFICIAL LEATHER AND GRAINED ARTIFICIAL LEATHER - A substrate for artificial leathers composed of an entangled nonwoven fabric made of microfine fibers and a binder resin. At least one surface of the substrate for artificial leathers is a densified layer which is made of the microfine fibers and which is substantially free from the binder resin. The binder resin is impregnated into a portion of the substrate for artificial leathers other than the densified layer. The densified layer prevents the binder resin impregnated into the entangled nonwoven fabric from migrating into the surface of the entangled nonwoven fabric, thereby providing the substrate for artificial leathers having the surface substantially free from the binder resin. The peeling strength between the substrate for artificial leathers and a grain layer formed on the surface thereof is drastically improved because the surface of the substrate for artificial leathers is substantially free from the binder resin. | 05-14-2009 |
20100086738 | LEATHER-LIKE SHEET BEARING GRAIN FINISH AND PROCESS FOR PRODUCING THE SAME - A (semi)grain-finished leather-like sheet composed of an entangled nonwoven fabric of three-dimensionally entangled fiber bundles containing microfine long fibers and an elastic polymer contained in the entangled nonwoven fabric. When dividing the (semi)grain-finished leather-like sheet to five layers with equal thickness, i.e., surface layer, substrate layer | 04-08-2010 |
20100159771 | BASE MATERIAL FOR ARTIFICIAL LEATHER AND METHOD OF PRODUCING THE SAME - A substrate for artificial leathers which is composed of a united laminate of a nonwoven fabric layer A made of bundles of microfine fibers having an average single fiber fineness of 0.5 dtex or less and a cushion layer B made of an elastic polymer sheet. A part of the microfine fibers constituting the nonwoven fabric layer A is allowed to penetrate through the cushion layer B to form a microfine fiber layer C on the outer surface of the cushion layer B. The inner surface of the elastic polymer sheet is undulated with a height difference of 100 μm or more in a thickness direction. Between the undulated surface of the elastic polymer sheet and the nonwoven fabric layer A, voids having a height of 100 μm or more in a thickness direction are formed. Using the substrate for artificial leathers, grain-finished artificial leathers which combine a softness without resistance and a stiff hand resembling natural sheep leathers and have bent wrinkles with fullness are produced. | 06-24-2010 |
20100239817 | LEATHER-LIKE SHEET AND PROCESS FOR PRODUCING THE SAME - A leather-like sheet comprising a microfine long-fiber nonwoven fabric comprising an entangled web structure made of bundles of microfine long fibers and an elastic polymer impregnated in the microfine long-fiber nonwoven fabric. The leather-like sheet has the following features: (1) each of the bundles of microfine long fibers comprises 5 to 70 microfine long fibers having an average single fiber fineness of 0.5 dtex or less; (2) the bundles of microfine long fibers have an average fineness of 3 dtex or less; (3) the entangle web structure comprises superposed webs each comprising the bundles of microfine long fibers; (4) a ratio of the microfine long fibers and the elastic polymer is 70/30 to 40/60 by mass; (5) the elastic polymer is substantially continuous; and (6) a machine direction/transverse direction ratio of breaking strength is 1/1 to 1.3/1, an elongation at break in each of the machine direction and the transverse direction is 80% or more, and a machine direction/transverse direction ratio of elongation at break is 1/1 to 1/1.5. With these features, the leather-like sheet has a natural dense feeling resembling natural leathers, a soft hand a small difference of mechanical properties in the machine direction and the transverse direction, a moderate resistance to elongation and a durable recovery. | 09-23-2010 |
20110039055 | BASE MATERIAL FOR ARTIFICIAL LEATHER AND PROCESS FOR PRODUCING THE SAME - A substrate for artificial leather comprising a nonwoven fabric of bundles of microfine filaments. The substrate for artificial leather simultaneously satisfies the following requirements 1 to 4: (1) the bundle of microfine filaments comprises 8 to 70 microfine filaments having a cross-sectional shape of nearly circle; (2) the bundle of microfine filaments has a cross-sectional area of 170 to 700 μm | 02-17-2011 |
20130055535 | BASE MATERIAL FOR ARTIFICIAL LEATHER AND GRAINED ARTIFICIAL LEATHER - A method of producing a substrate suitable for artificial leathers. The substrate is composed of an entangled nonwoven fabric made of microfine fibers and a binder resin. At least one surface of the substrate is a densified layer which is made of the microfine fibers and which is substantially free from the binder resin. The binder resin is impregnated into a portion of the substrate other than the densified layer. The densified layer prevents the binder resin impregnated into the entangled nonwoven fabric from migrating into the surface of the entangled nonwoven fabric, thereby providing the substrate having the surface substantially free from the binder resin. The peeling strength between the substrate and a grain layer formed on the surface thereof is drastically improved because the surface of the substrate is substantially free from the binder resin. | 03-07-2013 |