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1. 发明授权

US5741451A Method of making a high molecular weight polyolefin article 失效
标题翻译：制造高分子量聚烯烃制品的方法
公开(公告)号：US5741451A
公开(公告)日：1998-04-21
申请号：US516054
申请日：1995-08-17
申请人： James Jay Dunbar , Sheldon Kavesh , Dusan Ciril Prevorsek , Thomas Yiu-Tai Tam , Gene Clyde Weedon , Robert Charles Wincklhofer
发明人： James Jay Dunbar , Sheldon Kavesh , Dusan Ciril Prevorsek , Thomas Yiu-Tai Tam , Gene Clyde Weedon , Robert Charles Wincklhofer
IPC分类号： C08J5/00 , C08F8/00 , C08F10/00 , C08F10/02 , D01D5/04 , D01F6/04 , D01F6/46 , D01D5/12 , D02G3/00
CPC分类号： D01F6/04 , D07B2205/2014 , D07B2401/2005 , Y10S428/902 , Y10T428/2913 , Y10T428/2967 , Y10T442/30 , Y10T442/60
摘要： By poststretching, at a temperature between about 135.degree. and 160.degree. C., a polyethylene fiber, which has already been oriented by drawing at a temperature within 5.degree. C. of its melting point, an ultra high modulus, very low creep, low shrink, high tenacity polyolefin fiber having good strength retention at high temperatures is obtained. The poststretching can be in multiple stages and/or with previous annealing. The poststretching should be done at a draw rate of less than 1 second.sup.-1. Tensile modulus values over 2,000 g/d for multifilament yarn are consistently obtained for ultrahigh molecular weight polyethylene, with tensile strength values above 30 g/d while at the same time dramatically improving creep (at 160.degree. F. (71.1.degree. C.) and 39,150 psi load) by values at least 25% lower than fiber which has not been poststretched. Shrinkage is improved to values less than 2.5% of the original length when heated from room temperature to 135.degree. C. Performance at higher temperature is improved by about 15.degree. to 25.degree. C.
摘要翻译：通过在约135℃至160℃的温度下拉伸，已经通过在其熔点5℃的温度下拉伸定向的聚乙烯纤维，超高模量，非常低的蠕变，低获得在高温下具有良好强度保持性的收缩，强韧性聚烯烃纤维。后拉伸可以在多个阶段和/或先前的退火中。延期工作应以小于1秒-1的抽签率进行。对于超高分子量聚乙烯，拉伸强度值高于30g / d，同时显着改善蠕变（在160°F（71.1℃））和 39,150 psi负载），比尚未拉伸的纤维低至少25％。当从室温加热到135℃时，收缩率提高到小于原始长度的2.5％的值。在较高温度下的性能提高约15至25℃。

2. 发明授权

US5972498A Shaped polyethylene articles of intermediate molecular weight and high modulus 失效
标题翻译：中等分子量和高模量的聚乙烯制品
公开(公告)号：US5972498A
公开(公告)日：1999-10-26
申请号：US46317
申请日：1998-03-23
申请人： Sheldon Kavesh , Dusan Ciril Prevorsek
发明人： Sheldon Kavesh , Dusan Ciril Prevorsek
IPC分类号： B29C47/00 , B29C55/00 , B29K23/00 , C08F8/00 , C08F10/00 , C08F10/02 , C08J5/18 , D01D5/00 , D01F6/04 , D07B1/02 , D02G3/00
CPC分类号： D01F6/04 , B29C47/0004 , C08J5/18 , D01D5/00 , D07B1/02 , D07B1/025 , B29C47/0014 , B29C47/0021 , B29K2023/06 , B29K2105/0061 , B29K2223/06 , B29K2995/0088 , C08J2323/06 , D07B2205/2014 , D10B2321/0211 , Y10T428/2913 , Y10T428/2967 , Y10T428/31855
摘要： Solutions of intermediate molecular weight polymers from about 200,000 to about 4,000,000, such as polyethylene, in a relatively non-volatile solvent are extruded through an aperature at constant concentration and thereafter stretched at a ratio of at least about 3:1 prior to cooling to form a first gel. The first gels are extracted with a volatile solvent to form a second gel, and the second gel is dried to form a low porosity xerogel. Stretching occurs with any one or more of the first gel, second gel or xerogel. The polyethylene products produced by our process include products having a molecular weight between about 200,000 and about 4,000,000 a tenacity of at least about 13 grams/denier, a modulus of at least about 350 gram/denier, a porosity of less than 10% by volume, a crystalline orientation function of at least about 0.95, and a main melting temperature of at least about 140.degree. C.
摘要翻译：在相对非挥发性溶剂中的约200,000至约4,000,000的中等分子量聚合物（例如聚乙烯）的溶液通过恒定浓度的温度被挤出，然后在至少约3:1的比例下冷却形成第一个凝胶。第一凝胶用挥发性溶剂萃取以形成第二凝胶，并将第二凝胶干燥以形成低孔隙率干凝胶。任何一种或多种第一凝胶，第二凝胶或干凝胶都会发生拉伸。通过我们的方法生产的聚乙烯产品包括分子量为约200,000至约4,000,000的产品，至少约13克/旦尼尔的强度，至少约350克/旦尼尔的模量，小于10体积％的孔隙率，至少约0.95的结晶取向官能度和至少约140℃的主要熔融温度。

3. 发明授权

US5958582A Very low creep, ultra high modulus, low shrink, high tenacity polyolefin fiber having good strength retention at high temperatures and method to produce such fiber 失效
标题翻译：非常低的蠕变，超高模量，低收缩，高强度聚烯烃纤维在高温下具有良好的强度保持性和制造这种纤维的方法
公开(公告)号：US5958582A
公开(公告)日：1999-09-28
申请号：US64664
申请日：1998-04-20
申请人： James Jay Dunbar , Sheldon Kavesh , Dusan Ciril Prevorsek , Thomas Yiu-Tai Tam , Gene Clyde Weedon , Robert Charles Wincklhofer
发明人： James Jay Dunbar , Sheldon Kavesh , Dusan Ciril Prevorsek , Thomas Yiu-Tai Tam , Gene Clyde Weedon , Robert Charles Wincklhofer
IPC分类号： C08J5/00 , C08F8/00 , C08F10/00 , C08F10/02 , D01D5/04 , D01F6/04 , D01F6/46 , B32B3/00
CPC分类号： D01F6/04 , D07B2205/2014 , D07B2401/2005 , Y10S428/902 , Y10T428/2913 , Y10T428/2967 , Y10T442/30 , Y10T442/60
摘要： By poststretching, at a temperature between about 135.degree. and 160.degree. C., a polyethylene fiber, which has already been oriented by drawing at a temperature within 5.degree. C. of its melting point, an ultra high modulus, very low creep, low shrink, high tenacity polyolefin fiber having good strength retention at high temperatures is obtained. The poststretching can be in multiple stages and/or with previous annealing. The poststretching should be done at a draw rate of less than 1 second.sup.-1. Tensile modulus values over 2,000 g/d for multifilament yarn are consistently obtained for ultrahigh molecular weight polyethylene, with tensile strength values above 30 g/d while at the same time dramatically improving creep (at 160.degree. F. (71.1.degree. C.) and 39,150 psi load) by values at least 25% lower than fiber which has not been poststretched. Shrinkage is improved to values less than 2.5% of the original length when heated from room temperature to 135.degree. C. Performance at higher temperature is improved by about 15.degree. to 25.degree. C.
摘要翻译：通过在约135℃至160℃的温度下进行拉伸，已经通过在其熔点5℃的温度下拉伸定向的聚乙烯纤维，超高模量，非常低的蠕变，低获得在高温下具有良好强度保持性的收缩，强韧性聚烯烃纤维。后拉伸可以在多个阶段和/或先前的退火中。延期工作应以小于1秒-1的抽签率进行。对于超高分子量聚乙烯，拉伸强度值高于30g / d，同时显着改善蠕变（在160°F（71.1℃））和 39,150 psi负载），比尚未拉伸的纤维低至少25％。当从室温加热到135℃时，收缩率提高到小于原始长度的2.5％的值。在较高温度下的性能提高约15至25℃。

4. 发明授权

US5736244A Shaped polyethylene articles of intermediate molecular weight and high modulus 失效
公开(公告)号：US5736244A
公开(公告)日：1998-04-07
申请号：US520328
申请日：1995-08-28
申请人： Sheldon Kavesh , Dusan Ciril Prevorsek
发明人： Sheldon Kavesh , Dusan Ciril Prevorsek
IPC分类号： B29C47/00 , B29C55/00 , B29K23/00 , C08F8/00 , C08F10/00 , C08F10/02 , C08J5/18 , D01D5/00 , D01F6/04 , D07B1/02 , D02G3/00
CPC分类号： D01F6/04 , B29C47/0004 , C08J5/18 , D01D5/00 , D07B1/02 , D07B1/025 , B29C47/0014 , B29C47/0021 , B29K2023/06 , B29K2105/0061 , B29K2223/06 , B29K2995/0088 , C08J2323/06 , D07B2205/2014 , D10B2321/0211 , Y10T428/2913 , Y10T428/2967 , Y10T428/31855
摘要： Solutions of intermediate molecular weight polymers from about 200,000 to about 4,000,000, such as polyethylene, in a relatively non-volatile solvent are extruded through an aperature at constant concentration and thereafter stretched at a ratio of at least about 3:1 prior to cooling to form a first gel. The first gels are extracted with a volatile solvent to form a second gel, and the second gel is dried to form a low porosity xerogel. Stretching occurs with any one or more of the first gel, second gel or xerogel. The polyethylene products produced by our process include products having a molecular weight between about 200,000 and about 4,000,000 a tenacity of at least about 13 grams/denier, a modulus of at least about 350 gram/denier, a porosity of less than 10% by volume, a crystalline orientation function of at least about 0.95, and a main melting temperature of at least about 140.degree. C.

5. 发明授权

US3969930A Testing viscoelastic solids 失效
标题翻译：测试粘弹性固体
公开(公告)号：US3969930A
公开(公告)日：1976-07-20
申请号：US567144
申请日：1975-04-10
申请人： Dusan Ciril Prevorsek , Young Doo Kwon , Raj Kumar Sharma , Edward T. Gilliam
发明人： Dusan Ciril Prevorsek , Young Doo Kwon , Raj Kumar Sharma , Edward T. Gilliam
IPC分类号： G01N19/00 , G01N3/34
CPC分类号： G01N3/34 , G01N2203/0016 , G01N2203/0071 , G01N2203/0094 , G01N2203/0226
摘要： An apparatus and method for testing viscoelastic solids, such as tire cord. The apparatus includes: a holding means, a pretension means, a displacement generator, and a mechanical-electrical transforming means. The holding means holds the material in a predetermined position. The pretension means applies tension during testing. The displacement generator has an eccentric means for applying cyclic displacement. The mechanical-electrical transforming means transforms mechanical motion into electrical signals, such as a stress signal, a strain signal and a differentiated strain signal. There is a phase lag between the stress signal and the strain signal and the phase lag may vary in amount and direction as a function of time. The apparatus may also include: an integrating means for integration of a stress-strain hysteresis loop; and a display means for displaying an output of the integrating means to measure the area of the hysteresis loop and thereby determine energy loss. The method includes: applying strain to the material, with resulting stress developed in the material; transforming the strain into an electrical strain signal having a strain wave form; transforming the resulting stress into an electrical stress signal having a stress wave form; controlling the strain to produce a substantially sinusoidal strain wave form representing strain; and allowing the stress to produce a stress wave form representing stress which may be non-sinusoidal or sinusoidal.
摘要翻译：用于测试粘弹性固体的装置和方法，例如轮胎帘线。该装置包括：保持装置，预张紧装置，位移发生器和机械电转换装置。保持装置将材料保持在预定的位置。预张力在测试过程中施加张力。位移发生器具有用于施加循环位移的偏心装置。机电变换装置将机械运动转换成电信号，例如应力信号，应变信号和微分应变信号。在应力信号和应变信号之间存在相位滞后，并且相位滞后可以随着时间的变化而在量和方向上变化。该装置还可以包括：积分装置，用于积分应力 - 应变磁滞回线; 以及显示装置，用于显示积分装置的输出以测量磁滞回线的面积，从而确定能量损失。该方法包括：对材料施加应变，产生在材料中产生的应力; 将应变变换为具有应变波形的电应变信号; 将产生的应力变换为具有应力波形的电应力信号; 控制应变以产生表示应变的基本上正弦的应变波形; 并且允许应力产生表示可能是非正弦曲线或正弦曲线的应力的应力波形。

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