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    SHEETLIKE MATERIAL COMPRISING MULTICOMPONENT POLYMER
    51.
    发明专利
    SHEETLIKE MATERIAL COMPRISING MULTICOMPONENT POLYMER 失效

    公开(公告)号：JPS63275644A

    公开(公告)日：1988-11-14

    申请号：JP11121087

    申请日：1987-05-06

    Applicant: KURARAY CO

    Inventor： KOMORI SHINJI ,  KOGAME KUNIO ,  MAKIMURA MASARU

    IPC: C08J5/18 ,  B32B27/00

    Abstract: PURPOSE:To obtain the title material lowly tearable, resistant to delamination and excellent in stretchability, tensile strength, tear strength and heat sealability, by extrusion-molding at least two incompatible polymers are once, thereby forming external and internal layers of phases reversal to each other. CONSTITUTION:At least two incompatible polymers A and B with flow initiation temperatures different from each other by at least 10 deg.C, selected from among a polyester, a nylon, an olefin (co)polymer, PVC, a polycarbonate, etc. [e.g., nylon 6 (B) of an MFR of 12 and low-density PE (A) of an MFR of 27] are melt-kneaded at an A to B weight ratio of 25-75/75-25 under a high shear. The obtained molten polymer A/B is discharged from a slit die by using selected temperature conditions of 1+ or -0.15 for, for example, an A to B weight ratio of 50/50, and the obtained sheet is stretched uniaxially or biaxially to obtain the title sheet-like material in which the following external and internal layers of phases reversal to each other are formed. The dispersion state of said internal layer (2) is such that polymer A is a sea component and polymer B is an island component, and the dispersion state of said external layer (1) is such that polymer A is an island component and polymer B is a sea component.

    PRODUCTION OF IMPROVED LEATHER-LIKE MATERIAL
    54.
    发明专利
    PRODUCTION OF IMPROVED LEATHER-LIKE MATERIAL 失效

    公开(公告)号：JPS61207675A

    公开(公告)日：1986-09-16

    申请号：JP4685885

    申请日：1985-03-08

    Applicant: KURARAY CO

    Inventor： YAMASHITA SADAO ,  KOGAME KUNIO

    IPC: D06N3/14

    Abstract: PURPOSE:To obtain a leather-like material having excellent durability and feeling, and elegant surface appearance, by impregnating a specific urethane solution containing a specific amount of nitrogen atom originated from isocyanate group into a piece of cloth and coagulating the solution under stretching. CONSTITUTION:A solution of a polyurethane composed of (A) a polymer diol composed mainly of poly-3-methylpentane adipate having a molecular weight of 500-3,000 (B) a 2-6C low-molecular diol and (C) 4,4'-diphenylmethane diisocyanate and containing 3.5-6wt%, preferably 4.0-5.0wt% nitrogen atom originated from the isocyanate group in said urethane, is impregnated in and/or applied to a piece of cloth (especially nonwoven cloth of ultrafine fiber). The clock is stretched longitudinally by 0-10%, and immersed under tension in a non-solvent of said polyurethane (e.g. water) or in a texture of solvent and non-solvent to effect the coagulation of polyurethane.

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