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    1.
    发明专利
    未知

    公开(公告)号：DE1165400B

    公开(公告)日：1964-03-12

    申请号：DEV0021700

    申请日：1961-11-30

    Applicant: GLANZSTOFF AG

    Inventor： SOMMER DR ERWIN ,  GERLACH DR KLAUS ,  WERNER DR HELMUT

    IPC: B29C70/00 ,  D01D5/253

    Abstract: In a process for manufacturing flat sheets of fibrous material of synthetic polymers by pouring an aqueous dispersion of fibres on suitable perforated bases, and de-watering and consolidating the flat structures, the fibres used have a smooth surface and are of such a form that plane surfaces are available for contact between the fibres, and the fleece produced from these fibres is dewatered before it is removed from the base to a residual moisture content of 30-79% calculated on the weight of the wet fleece. The fibres may be in the form of flat strips or have a cross-section approximately in the form of an isosceles triangle. In examples given, a polyamide of captolactam or of adipic acid and hexamethylene diamine, polyethylene terephthalate, or polypropylene, was spun through a 36 aperture nozzle. The threads obtained are stretched, washed in soap solution and cut to 2-6 mm. lengths. An 0.05% aqueous fibre dispersion has prepared and a dispersing agent-a sodium salt of a higher aliphatic sulphonic acidwas added. After stirring, the dispersion of a polypassed through a slot-shaped aperture on to a moving endless screen band provided with suction boxes and squeegee rollers. The fleece was then sprayed with a 10% aqueous dispersion of a polymethacrylic acid ester, or a synthetic resin based on polyvinyl chloride, or with a 5% methanolic solution of a copolyamide consisting of 60% hexamethylene diamine and adipic acid and 40% captolactam. The web was dried by heating and in some example pressure was then applied. Alternatively the fibres may be obtained by cutting up thin foils. Specifications 868,651 and 876,693 are referred to.

    4.
    发明专利
    未知

    公开(公告)号：DE1669436A1

    公开(公告)日：1969-10-30

    申请号：DEG0050110

    申请日：1967-05-18

    Applicant: GLANZSTOFF AG

    Inventor： SOMMER DR ERWIN ,  LOTZ DR RUDOLF ,  WILOTH DR FRITZ ,  WICK GERHARD ,  WERNER DR HELMUT

    IPC: D01F8/12 ,  D01F

    Abstract: 1,225,697. Polyamide crimpable composite filaments. GLANZSTOFF A.G. 8 May, 1968 [18 May, 1967], No. 21777/68. Heading B5B. Composite filaments of the eccentric sheathcore type which undergo crimping when immersed in water, particularly hot water, are produced by extruding simultaneously through each extrusion orifice of a spinneret adapted for the melt-spinning of eccentric sheath-core filaments a melt of a homopolyamide (to form the sheath) and a melt of a copolyether amide (to form the core), which has been produced by polycondensation of adipic acid with 75 to 20 mol per cent of an ether diamine having the formula H 2 N-(CH 2 ) 3 -R-(CH 2 ) 3 -NH 2 in which R represents either -O-, or -O-(CH 2 ) n -O- in which n is 2 to 4, and 25 to 80 mol per cent of hexamethylene diamine. The two polymers shrink to different extents when immersed in water, particularly hot water. The sheath may consist of polyhexamethylene adipamide, polycaprolactam, or polyaminoundecanoic acid. The composite filaments formed may be cold-stretched, e.g. at a stretch ratio of 3À5 : 1. The ratio by weight between the sheath and core of the composite filaments may be between 30 : 70 and 70 : 30, preferably 50 : 50. The shrinkage of the composite filaments may be determined after their immersion in water at 95‹ and 20‹ C.

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