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    • 2. 发明申请
    • MULTILAYER TUBE FOR TRANSPORTING WATER OR GAS
    • 用于运输水或气的多层管
    • US20110094612A1
    • 2011-04-28
    • US12376658
    • 2007-08-07
    • Anthony BonnetAude LapprandPascal Sebire
    • Anthony BonnetAude LapprandPascal Sebire
    • F16L9/14
    • B32B27/30B32B1/08B32B27/32C08L27/12F24D3/146Y02B30/24C08L2666/24
    • The invention relates to a multilayer tube comprising (in the order from the inside to the outside of the tube), layers arranged one on top of the other: an optional layer L1 comprising at least one fluorinated polymer, preferably a PVDF; a layer L2 comprising at least one functionalized PVDF, obtained by radiation-grafting of at least one unsaturated polar monomer onto a PVDF; an optionally layer L3 of an adhesion binder; a layer L4 comprising at least one polyolefin optionally mixed with at least one functionalized polyolefin; an optional barrier layer L5; an optional layer L6 comprising at least one polyolefin, optionally in a mixture with at least one functionalized polyolefin; characterized in that the PVDF onto which the unsaturated polar monomer is grafted is a VDF copolymer those weight content is at least 50%, preferably at least 75%, and at least one monomer copolymerizable with the VDF, having the following characteristics: a crystallization temperature Tc (measured by DSC as per the ISO Standard 11357-3) ranging from 50 to 120° C., preferably 85 to 110° C.; a yield strength σY ranging from 10 to 40 MPa, preferably 10 to 30 MPa; and a melt viscosity η (measured with a capillary rheometer at 230° C. at 100 s−1) ranging from 100 to 1500 Pa·s, preferably 400 to 1200 Pa·s.”
    • 本发明涉及一种多层管,其包括(从管的内侧到外侧的顺序),一个彼此排列的层:包含至少一种氟化聚合物,优选PVDF的任选层L1; 包含至少一种官能化PVDF的层L2,其通过将至少一种不饱和极性单体辐射接枝到PVDF上获得; 粘合粘合剂的任选层L3; 包含任选与至少一种官能化聚烯烃混合的至少一种聚烯烃的层L4; 可选的阻挡层L5; 任选的层L6,其包含至少一种聚烯烃,任选地与至少一种官能化聚烯烃的混合物; 其特征在于不饱和极性单体接枝在其上的PVDF是VDF共聚物,其重量含量为至少50%,优选至少75%,和至少一种可与VDF共聚的单体,具有以下特征:结晶温度 Tc(根据ISO标准11357-3通过DSC测量)的范围为50至120℃,优选为85至110℃。 屈服强度Y为10〜40MPa,优选为10〜30MPa, 和熔体粘度& (用毛细管流变仪在230℃下在100s -1下测量)为100〜1500Pa·s,优选为400〜1200Pa·s。