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    STRUCTURE MULTICOUCHE A BASE DE POLYAMIDES ET TUBE OU CONDUIT A STRUCTURE MULTICOUCHE
    3.
    发明授权
    STRUCTURE MULTICOUCHE A BASE DE POLYAMIDES ET TUBE OU CONDUIT A STRUCTURE MULTICOUCHE 失效
    多层结构基于聚酰胺及管子具有多层结构

    公开(公告)号：EP0993372B1

    公开(公告)日：2005-08-17

    申请号：EP98934994.9

    申请日：1998-06-24

    申请人： Rhodia Engineering Plastics Srl

    发明人： PEDUTO, Nicolangelo ,  SPERONI, Franco

    IPC分类号： B32B27/34 ,  B32B27/18 ,  F16L11/04

    CPC分类号： B32B27/34 ,  B32B1/08 ,  B32B27/08 ,  B32B27/32 ,  B32B2307/558 ,  B32B2597/00 ,  F16L9/12 ,  F16L11/04 ,  F16L2011/047 ,  Y10T428/13 ,  Y10T428/1307 ,  Y10T428/1317 ,  Y10T428/1321 ,  Y10T428/1352 ,  Y10T428/1393 ,  Y10T428/1397 ,  Y10T428/31732

    摘要： The invention concerns a multilayer structure based on polyamides, particularly suitable for making tubes or conduits for transporting liquid fluids such as alcohol's, liquid fuels, fuel containing oxygen-containing compounds such as, for example alcohol's or refrigerating fluids. The multilayer structure comprises two superposed layers: at least one internal layer and at least one external layer. The invention is characterised in that at least the internal layer is based a composition comprising at least one thermoplastic polyamide and at least one agent modifying resistance to shocks in a weight proportion between 10 and 50 % of said composition, and at least the external layer is based on a composition containing as polymeric matrix a polyamide composition selected among the group comprising: (i) a thermoplastic copolymer obtained by copolymerisation of epsilon -caprolactam with at least one of the monomers selected among the group comprising: an aminoacid containing at least 9 carbon atoms, or the corresponding lactam, a mixture of hexamethylenediamine with a diacid comprising at least 9 carbon atoms, the weight ratio between the epsilon -caprolactam and the total hexamethylenediamine and diacid and/or aminoacid ranging between 4 and 9, or (ii) a mixture of at least said thermoplastic copolymer and at least a second thermoplastic polyamide or copolyamide obtained by polymerisation of monomers containing less than 9 carbon atoms. The weight content of the second polymer or copolymer in the polymeric matrix is between 0 and 80 wt. %, preferably between 0 and 40 wt. %. The multilayer structure has high barrier properties against fuel vapour and good mechanical properties such as good resistance to cracking.

    COMPOSITION POLYAMIDE POUR PROCEDE DE FABRICATION D'ARTICLES PAR EXTRUSION-SOUFFLAGE ET ARTICLES OBTENUS
    10.
    发明公开
    COMPOSITION POLYAMIDE POUR PROCEDE DE FABRICATION D'ARTICLES PAR EXTRUSION-SOUFFLAGE ET ARTICLES OBTENUS 失效
    聚酰胺组合物的文章通过挤出吹塑成型的制造，AND ARTICLE获得

    公开(公告)号：EP0977810A1

    公开(公告)日：2000-02-09

    申请号：EP98925468.5

    申请日：1998-04-09

    申请人： Rhodia Engineering Plastics Srl

    发明人： ARMANNI, Corrado

    IPC分类号： C08L77/00

    CPC分类号： C08L77/00 ,  C08L23/00 ,  C08L51/00

    摘要： The invention concerns a polyamide composition with rheological properties in molten state compatible with a method for shaping by extrusion blow-moulding and improved flexibility for instance, at low temperature. The composition comprises a polyamide thermoplastic polymer based matrix and at least an agent modifying impact strength present at a ponderal concentration between 10 and 50 % of the composition, said composition modulus being less than 1500 MPa's. The invention also concerns an article in the form of a tube comprising a first part (1) obtained by extrusion blow-moulding of a rigid polyamide, a second part (2) likewise obtained by extrusion blow-moulding of a rigid polyamide composition, and an intermediate third part (3) in the form of bellows produced by extrusion blow-moulding of a polyamide composition corresponding to example 1. The extrusion of each part is carried out successively.