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    1.
    发明专利
    未知

    公开(公告)号：DE4202335A1

    公开(公告)日：1993-08-05

    申请号：DE4202335

    申请日：1992-01-29

    Applicant: BASF AG

    Inventor： GREENING GIORGIO DR ,  SAGUET PHILIPPE ,  LAWS REGINA ,  ITTEMANN PETER DR

    IPC: A63B49/02 ,  A63B49/03 ,  A63B49/10 ,  A63B49/11 ,  B32B1/08

    Abstract: The bridge (3) between the arms (2) of the grip (1) is also a tube of consolidated thermoplastic fibre/carbon fibre-hybrid yarn, which is filled with a foamed thermoplastic with a density between 20 and 400 g/l. The thermoplastic fibres comprise a polyamide and the plastic foam is a polyamide, a polysulphone or a polyether sulphone. To make the racquet frame, a tubular network of thermoplastic/carbon fibre/hybrid yarn is formed, into which is introduced a flexible, thin-walled, inflatable hose. The tubular network is formed into the shape of a racquet frame, and a piece of tubular hybrid yarn network is laid as bridge (3) between the arms (2) of the frame so that the two arms are encompassed by two tongue-shaped segments of the bridge. The frame is placed in a metal mould which is then closed. The hose is then inflated exerting a pressure on the hybrid yarn network which by subsequent heating is consolidated to form a fibre-reinforced tube.

    Multilayer board with honeycomb core and thermoset adhesive layers - has outer layers of partly crystalline thermoplastic activated by corona treatment or application of amorphous thermoplastic
    5.
    发明专利
    Multilayer board with honeycomb core and thermoset adhesive layers - has outer layers of partly crystalline thermoplastic activated by corona treatment or application of amorphous thermoplastic 未知

    公开(公告)号：DE4111638A1

    公开(公告)日：1992-10-15

    申请号：DE4111638

    申请日：1991-04-10

    Applicant: BASF AG

    Inventor： GREENING GIORGIO DR

    IPC: B32B7/12 ,  B32B27/04 ,  B32B37/14 ,  B32B37/16 ,  C08J5/12

    Abstract: A process for the prodn. of multilayer boards (I) involves pressing together (A) a core layer, (B) outer layer(s) of partly crystalline, opt. reinforced thermoplastic and (C) layer(s) or thermosetting adhesive; the novelty is that layers (B) are pre-activated on the side facing (C) by (a) corona treatment of (b) applying a layer of amorphous thermoplastic. (A) consists of plastic-coated paper with a honeycomb structure, (B) is fibre- reinforced polyether-ketone (PEK) or polyether-sulphone (PES) and (C) is epoxy resin; (B) is activated by irradiation with electrons at 10-50 kV or by co-consolidation with PES film. Pref., (A) is a honeycomb core 3-100 mm thick, made of Nomex paper (RTM: plastic coated paper); (B) is 0.1-10 mm thick, reinforced with 40-70 vol.% glass, carbon or aramid fibre, and is activated by irradiation for 0.1-10 secs. with electrons at 20-30 kV or by hot-pressing at 5-25 bar with PES film etc.; layers are laminated for 20-1000 mins. in a press at 100-250 deg.C and up to 10 bar. USE/ADVANTAGE - (I) are useful for the prodn. of aircraft parts, railway coach walls and sports equipment, e.g. surf boards. Activation of partly crystalline thermoplastic (B) enables good bonding with honeycomb core (A) by means of thermosetting adhesive (

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