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    • 2. 发明专利
    • High tenacity, high modulus filament
    • 高密度,高模量纤维
    • JP2011208347A
    • 2011-10-20
    • JP2011108338
    • 2011-05-13
    • Honeywell Internatl Incハネウェル・インターナショナル・インコーポレーテッド
    • KAVESH SHELDON
    • D01F6/04F41H5/08D01D4/02D02G3/44F41H5/00F41H5/02
    • D01D4/02D01F6/04F41H5/0471Y10T428/2913Y10T442/2623Y10T442/3667Y10T442/622Y10T442/629
    • PROBLEM TO BE SOLVED: To provide a high tenacity, high modulus yarn, in detail to provide a high tenacity (tenacity), high modulus polyethylene multifilament yarn which has a unique and new microstructure and extremely high toughness.SOLUTION: Polyethylene solutions are extruded through a multi-orifice spinneret 26 into a cross-flow gas stream to form a fluid product 33. The fluid product is stretched at a temperature at which a gel will form at a stretch ratio of at least 5:1 over a length of less than about 25 mm with the cross-flow gas stream velocity at less than about 3 m/min. The fluid product is quenched in a quench bath 36 consisting of an immiscible liquid to form a gel. The solvent is removed from the gel to form a xerogel and the xerogel product is stretched in at least two stages to produce a polyethylene yarn characterized by a tenacity of at least 35 g/d, a modulus of at least 1,600 g/d and a work to break of at least 65 J/g. The polyethylene multifilament yarn is further characterized by having greater than about 60% of a high strain orthorhombic crystalline component and, optionally, a monoclinic crystalline component greater than about 2% of the crystalline content.
    • 要解决的问题:为了提供高强度,高模量纱线,以提供具有独特和新的微结构和极高韧性的高韧性(韧性),高模量聚乙烯复丝纱线。解决方案:聚乙烯溶液通过 多孔喷丝板26成为横流气流以形成流体产品33.流体产物在凝胶将以至少5:1的拉伸比形成的温度下拉伸,长度小于 约25mm,交叉流气流速度小于约3m / min。 流体产物在由不混溶液体组成的骤冷浴36中骤冷以形成凝胶。 从凝胶中除去溶剂以形成干凝胶,并将干凝胶产品在至少两个阶段中拉伸,以产生聚乙烯纱线,其特征在于至少35g / d的强度,至少1600g / d的模量和 工作打破至少65 J / g。 聚乙烯复丝纱的特征还在于具有高于约60%的高应变斜方晶结晶组分,以及任选的大于结晶含量的约2%的单斜晶体组分。