Fibrous substrate for artificial leather and artificial leather using the same

• Main Authors: NAKAYAMA, KIMIO, TAMBA, YOSHIHIRO, YAMASAKI, TSUYOSHI
• Format: Patent
• Language: English; French; German
• Published: 10.01.2001
• Edition: 7
• Subjects: BRAIDING; COTTON-WOOL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; KNITTING; LACE-MAKING; LAUNDERING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; NON-WOVEN FABRICS; PERFORMING OPERATIONS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TEXTILES; TRANSPORTING; TREATMENT OF TEXTILES OR THE LIKE; TRIMMINGS; WADDING; WALL, FLOOR OR LIKE COVERING MATERIALS, e.g. LINOLEUM,OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF AFIBROUS WEB COATED WITH A LAYER OF MACROMOLECULARMATERIAL

A fibrous substrate for artificial leather, comprising microfine fiber bundles, each of which is composed of 3-50 microfine fibers (A) comprising an elastic polymer and having an average fineness of 0.5 denier or less and 15 or more microfine fibers (B) comprising a non-elastic polymer and having an average fineness of 0.2 denier or less, the microfine fiber bundles satisfying the following conditions (1)-(3): (1) the ratio of the number of strands of the A to the number of strands of the B in cross sections of the bundles (A/B) is 1/5 or less, (2) the ratio of the weight of the A to the weight of the B in the bundles (A/B) is 10/90-60/40, and (3) the microfine fibers (B) comprising the non-elastic polymer encircle each of the microfine fibers (A) comprising the elastic polymer. It is possible to obtain, from the fibrous substrate, suede-like artificial leather and grain-like artificial leather having texture and appearance like natural leather, and having high-class feeling never available from artificial leather in the prior art.