-
公开(公告)号：US4695240A
公开(公告)日：1987-09-22
申请号：US596497
申请日：1984-04-04
申请人： Hsin L. Li , Dusan C. Prevorsek
发明人： Hsin L. Li , Dusan C. Prevorsek
CPC分类号： B29C47/585 , B29C47/0801 , B29C47/788 , B29C47/82 , B29C47/822 , B30B11/241 , B29C47/0009
摘要： A mini-extruder apparatus for extruding small quantities of material. The apparatus is designed to overcome the problems of excessive heat transfer from the heated portion of the barrel to the feed portion of the extruder barrel and the premature failure of the long thin extruder screws employed in extruders. The mini-extruder includes an extruder barrel having a substantially circumferential, radially extending cavity formed in an isolator portion of the extruder barrel to thermally isolate the feed portion from the heated portion. The mini-extruder also includes a drive system constructed to drive the extruder screw at both ends. The mini-extruder can also be designed as a co-rotating or counter-rotating twin screw extruder where each end of each extruder screw is driven.
摘要翻译： 用于挤出少量材料的微型挤出机装置。 该设备被设计成克服了从筒的加热部分到挤出机筒的进料部分的过度热传递以及挤出机中使用的长薄挤出机螺杆的过早失效的问题。 该微型挤出机包括挤出机筒，该挤出机筒具有形成在挤出机筒的隔离部分中的基本上圆周的径向延伸的空腔，以将进料部分与加热部分进行热隔离。 微型挤出机还包括驱动系统，其驱动两端的挤出机螺杆。 微型挤出机也可以被设计为同向旋转或反向旋转的双螺杆挤出机，其中每个挤出机螺杆的每一端被驱动。
-
公开(公告)号：US4681792A
公开(公告)日：1987-07-21
申请号：US825037
申请日：1985-12-09
申请人： Gary A. Harpell , Igor Palley , Dusan C. Prevorsek
发明人： Gary A. Harpell , Igor Palley , Dusan C. Prevorsek
CPC分类号： B32B27/00 , B32B7/00 , F41H5/0485 , Y10S428/902 , Y10S428/911 , Y10T428/24033 , Y10T428/24992 , Y10T442/352
摘要： The present invention provides improved, flexible articles of manufacture comprising a plurality of first flexible layers arranged in a first portion of said article, each of said first layers consisting essentially of fibers, the fibers of each of said flat layers comprising fibers having a tensile modulus of at least about 300 g/denier and a tenacity of at least about 15 g/denier and a plurality of second flexible layers arranged in a second portion of said article, each of said second flexible layers comprising fibers, the resistance to displacement of fibers in each of said second flexible layers being greater than the resistance to displacement of fibers in each of said first flexible layers.
摘要翻译： 本发明提供了改进的柔性制品，其包括布置在所述制品的第一部分中的多个第一柔性层，每个所述第一层基本上由纤维组成，每个所述扁平层的纤维包含具有拉伸模量 至少约300g /旦尼尔和至少约15g /旦尼尔的强度和布置在所述制品的第二部分中的多个第二柔性层，每个所述第二柔性层包含纤维，耐纤维位移的阻力 在每个所述第二柔性层中的所述第一柔性层中的每一个中的纤维的位移大于所述第一柔性层的每一个中的纤维的位移阻力。
-
53.发明授权
公开(公告)号：US4663101A
公开(公告)日：1987-05-05
申请号：US690914
申请日：1985-01-11
申请人： Sheldon Kavesh , Dusan C. Prevorsek
发明人： Sheldon Kavesh , Dusan C. 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 , D01D5/08
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 aperture 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.
-
公开(公告)号：US4599267A
公开(公告)日：1986-07-08
申请号：US569818
申请日：1984-01-11
CPC分类号： D01F6/14 , Y10T428/2913
摘要： Polyvinyl alcohol of molecular weight over 500,000 (i.e. 1,500,000 to 2,500,000) is spun as a dilute solution (2-15%) in a relatively non-volatile solvent such as glycerin. The resultant gel fiber is extracted with a volatile solvent such as methanol and dried. Upon stretching at one or more stages during the process, fibers of tenacity above 10 g/denier and modulus above 200 g/denier (e.g. 18 and 450, respectively) are produced.
-
公开(公告)号：US4584347A
公开(公告)日：1986-04-22
申请号：US597283
申请日：1984-04-06
CPC分类号： D01F6/46 , D01F6/04 , B29K2023/06 , B29K2223/06 , B29K2423/06
摘要： Fibers prepared by spinning, drawing and drying dilute solutions of ultrahigh molecular weight polyethylene or polypropylene are modified by including in the dilute solution a polymeric additive. The polyethylene fibers so prepared have melting points above 140.degree. C. and exhibit improved adherence to matrices, resistance to fibrillation and other advantageous properties. Additives include lower molecular weight polyolefins, oxidized polyolefins, olefin copolymers, polyolefin graft copolymers and polyoxymethylenes.
摘要翻译： 通过纺丝，拉伸和干燥超高分子量聚乙烯或聚丙烯的稀溶液制备的纤维通过在稀释溶液中包含聚合物添加剂而被改性。 如此制备的聚乙烯纤维具有高于140℃的熔点，并且表现出改善的对基质的粘附性，抗纤颤性和其它有利性质。 添加剂包括低分子量聚烯烃，氧化聚烯烃，烯烃共聚物，聚烯烃接枝共聚物和聚甲醛。
-
公开(公告)号：US4457985A
公开(公告)日：1984-07-03
申请号：US466496
申请日：1983-02-18
IPC分类号： F41H1/00 , B32B5/02 , B32B27/32 , D01F6/04 , D01F6/06 , D03D15/00 , F41H5/00 , F41H5/04 , D03D3/00
CPC分类号： A42B3/062 , B32B27/32 , F41H5/0478 , F41H5/0485 , Y10S428/911 , Y10T442/3976
摘要： Articles such as vests, helmets and structural elements containing a network of ultrahigh molecular weight, high strength, high modulus polyethylene or polypropylene fibers. The fibers, and especially polyethylene fibers of 15, 20, 25, 30 or more g/denier tenacity, and 300, 500, 1,000, 1,500 or more g/denier tensile modulus impart exceptional ballistic resistance to the articles in spite of the melting points, e.g. 145.degree.-151.degree. C. for the polyethylene fibers and 168.degree.-171.degree. C. for the polypropylene fibers, which are high for these polymers, but substantially lower than the 200.degree. C. or more melting point previously thought necessary for good ballistic resistance.
摘要翻译： 诸如背心，头盔和包含超高分子量，高强度，高模量聚乙烯或聚丙烯纤维网络的结构元件的制品。 纤维，特别是15,20,25,30或更多g /旦尼尔强度和300,500,1,000,1,500或更多g /旦尼尔拉伸模量的聚乙烯纤维，尽管熔点赋予了制品特有的防弹性 ，例如 对于聚丙烯纤维，对于聚乙烯纤维，对于聚丙烯纤维，对于聚丙烯纤维，对于聚丙烯纤维，对于聚丙烯纤维，对于高聚丙烯纤维，对于聚乙烯纤维，对于145℃-151℃，而对于这些聚合物而言是高的，但是基本上低于200℃或更高的熔点。 抵抗性。
-
公开(公告)号：US5556704A
公开(公告)日：1996-09-17
申请号：US305530
申请日：1994-09-13
申请人： Dusan C. Prevorsek , Hsin L. Li
发明人： Dusan C. Prevorsek , Hsin L. Li
CPC分类号： F16D69/023 , C04B35/83 , Y10T428/30
摘要： This invention relates to a carbon-carbon composite material formed by applying a vertical compressive force and a variable lateral force simultaneously to a mixture of carbon fiber and a carbon precursor material during carbonization of the mixture.
摘要翻译： 本发明涉及通过在混合物碳化期间同时向碳纤维和碳前体材料的混合物施加垂直压缩力和可变横向力而形成的碳 - 碳复合材料。
-
公开(公告)号：US5480706A
公开(公告)日：1996-01-02
申请号：US260661
申请日：1994-06-16
申请人： Hsin L. Li , Young D. Kwon , Dusan C. Prevorsek
发明人： Hsin L. Li , Young D. Kwon , Dusan C. Prevorsek
CPC分类号： F41H5/0485 , B29C70/08 , B32B5/28 , Y10S428/902 , Y10S428/911 , Y10S428/92 , Y10T428/24124 , Y10T442/3439 , Y10T442/3715 , Y10T442/3789 , Y10T442/3813 , Y10T442/3984 , Y10T442/494 , Y10T442/56 , Y10T442/656 , Y10T442/669
摘要： This invention relates to a fire resistant multilayer complex ballistic resistant article comprising at least one first layer comprised a plurality of flammable fibers a first matrix and at least one second layer which is adjacent to said first layer which comprises a plurality of fire resistant fibers in a second matrix, wherein the second matrix comprises a fire retardant material and is different from the first matrix material.
摘要翻译： 本发明涉及一种防火多层复合防弹制品，其包括至少一个包含多个易燃纤维的第一层，第一层和第二层与第一层相邻，第一层与第一层相邻，该第二层包含多个耐火纤维， 第二基质，其中所述第二基质包含阻燃材料并且不同于所述第一基质材料。
-
59.发明授权
公开(公告)号：US5405524A
公开(公告)日：1995-04-11
申请号：US145361
申请日：1993-10-29
申请人： Raj K. Sharma , Dusan C. Prevorsek
发明人： Raj K. Sharma , Dusan C. Prevorsek
IPC分类号： C10C3/02
CPC分类号： C10C3/026
摘要： The process of the invention comprises:a) heating at least one low molecular weight aromatic hydrocarbon in the presence of a Lewis acid under conditions sufficient to produce a pitch of desired composition and properties;b) recovering a pitch of desired composition and properties.The process of the invention may be used to produce pitch which can be used in roofing and binder applications.
摘要翻译： 本发明的方法包括：a）在足以产生所需组成和性质的沥青的条件下，在路易斯酸存在下加热至少一种低分子量芳烃; b）回收所需组成和性质的沥青。 本发明的方法可用于产生可用于屋顶和粘结剂应用中的沥青。
-
60.发明授权Rigid polyethylene reinforced composites having improved short beam shear strength 失效具有改进的短束剪切强度的刚性聚乙烯增强复合材料
公开(公告)号：US5395691A
公开(公告)日：1995-03-07
申请号：US28735
申请日：1993-03-08
申请人： Sheldon Kavesh , Kwang Kim , Young D. Kwon , Dusan C. Prevorsek
发明人： Sheldon Kavesh , Kwang Kim , Young D. Kwon , Dusan C. Prevorsek
CPC分类号： C08J5/046 , B29C70/10 , B32B27/02 , C08J5/04 , F41H5/0485 , B29K2023/06 , Y10T428/24058 , Y10T428/24124 , Y10T428/24132 , Y10T428/24636 , Y10T428/29 , Y10T428/2913 , Y10T428/2927 , Y10T428/2929
摘要： The present invention relates to high strength, high modulus polyethylene filaments which form composites having improved shear strength and composites formed from said filaments.
摘要翻译： 本发明涉及形成具有改进的剪切强度的复合材料的高强度高模量聚乙烯长丝和由所述长丝形成的复合材料。
-
-
-
-
-
-
-
-
-
搜索结果
96 条记录 (耗时 0.051 秒)
