Abstract:
The invention relates to a gel-spun fiber comprising a polyolefin polymer forming a fiber body, wherein a stabilizer is present inside the fiber body, characterized in that the amount of said stabilizer is between 0.001 and 10 parts by weight based on 100 parts by weight of the amount of the polyolefin polymer forming said fiber body and wherein said stabilizer is carbon black.
Abstract:
The invention relates to a gel-spun fiber comprising an ultra-high molecular weight polyethylene (UHMWPE), wherein the UHMWPE has an intrinsic viscosity (IV) of at least 4 dL/g and comprises at least 0.3 short chain branches per thousand total carbon atoms (SCB/1000TC), characterized in that the fiber further comprises between 0.1 and 10 parts by weight of carbon black based on 100 parts by weight of the amount of the polyethylene forming the fiber. The invention further relates to a yarn comprising at least 5 such gel-spun fibers as well as to articles comprising said fibers or yarns.
Abstract:
The invention relates to a process for producing gel-spun ultra high molecular weight polyethylene (UHMWPE) fibres having high tensile strengths and improved creep rates wherein the UHMWPE used in said process comprises per thousand carbon atoms between 0.1 and 1.3 methyl side groups; and between 0.08 and 0.6 of methyl end groups; and wherein the overall draw ratio (DR overall = DR fluid x DR gel x DR solid ) is at least 7000 provided that the fluid draw ratio DR fluid = DR sp x DR ag is at least 100, wherein DR sp is the draw ratio in the spinholes and DR ag is the draw ratio in the air gap. The invention further relates to gel-spun UHMWPE fibres produced thereof. The gel-spun UHMWPE fibres of the invention have a tensile strength of at least 4 GPa, and a creep rate as measured at 70°C under a load of 600 MPa of at most 6 x 10 -7 sec -1 . The gel-spun UHMWPE fibres produced thereof are useful in a variety of applications, the invention relating in particular to ropes, medical devices, composite articles and ballistic-resistant articles containing said UHMWPE fibres.
Abstract translation:本发明涉及生产具有高拉伸强度和改进的蠕变速率的凝胶纺丝超高分子量聚乙烯(UHMWPE)纤维的方法,其中用于所述方法中的UHMWPE包含每千个碳原子在0.1 和1.3个甲基侧基; 和在0.08和0.6之间的甲基端基; 并且其中总体拉伸比(DR总体= DR×流体×DR×凝胶×DR×固体)至少为 7000条件下,流体拉伸比DR fluid sub> = DR sp ag sub>至少为100,其中DR sp sub >是纺丝孔中的拉伸比,而DR 是气隙中的拉伸比。 本发明还涉及由其生产的凝胶纺UHMWPE纤维。 本发明的凝胶纺UHMWPE纤维具有至少4GPa的拉伸强度和在70℃和600MPa的负荷下测得的蠕变速率至多为6×10 -7 / 秒 -1 SUP>。 由此生产的凝胶纺UHMWPE纤维可用于多种应用中,本发明尤其涉及绳索,医疗装置,复合制品和含有所述UHMWPE纤维的防弹制品。 p>