WO2000046436A1 - Fibre de polyethylene extremement resistante et non-tisse pour separateur de cellules electriques et element resistant au choc - Google Patents

Fibre de polyethylene extremement resistante et non-tisse pour separateur de cellules electriques et element resistant au choc Download PDF

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Publication number
WO2000046436A1
WO2000046436A1 PCT/JP2000/000637 JP0000637W WO0046436A1 WO 2000046436 A1 WO2000046436 A1 WO 2000046436A1 JP 0000637 W JP0000637 W JP 0000637W WO 0046436 A1 WO0046436 A1 WO 0046436A1
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Prior art keywords
fiber
strength polyethylene
polyethylene fiber
impact
strength
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Application number
PCT/JP2000/000637
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English (en)
Japanese (ja)
Inventor
Yasuo Ohta
Godo Sakamoto
Kouji Kawaida
Yukihiro Nomura
Original Assignee
Toyo Boseki Kabushiki Kaisha
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Publication of WO2000046436A1 publication Critical patent/WO2000046436A1/fr

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series

Definitions

  • High-strength polyethylene fiber, nonwoven fabric for battery separator, and impact-resistant member are High-strength polyethylene fiber, nonwoven fabric for battery separator, and impact-resistant member
  • the present invention relates to high-performance textiles such as various sports clothing, bulletproof and protective clothing, and more specifically, various filters, battery separators, or supplementary yarns thereof.
  • high-strength polyethylene fibers for example, as disclosed in Japanese Patent Publication No. 60-47922, ultra-high molecular weight polyethylene is used as the raw material, and the so-called "gel spinning method" is used to achieve unprecedented high strength. It is known that a high modulus fiber can be obtained, and is already widely used in industry. These high-strength polyethylene fibers have the advantage of high strength and high elastic modulus, but on the other hand, there have been cases in which the high elastic modulus of the fibers causes troubles in various applications due to the disaster. For example, when a high-strength polyethylene fiber is used as an ordinary fabric, the texture is very hard and is extremely unsuitable from the viewpoint of comfortable wearing.
  • the yarn obtained by the above-mentioned gel spinning method usually has an average fineness of a single fiber of 1.1 dte X to 11.1 dte X. For example, 0.6 as in the present invention described later.
  • Low fineness yarns at the level of 0.33 or 0.31dtex, as well as 7 dtex or less, can be produced industrially, even if they can be obtained very instantaneously. It was virtually impossible to obtain them by their properties, and even if possible, the physical properties of the fibers were significantly reduced, and they were not practical.
  • the inventors presume the cause as follows. That is, in the gel spinning method in which fibers are produced from raw materials having extremely high intrinsic viscosity, it is necessary to stretch the molecular chains to the limit in order to obtain high-strength fibers, but in that case, the molecular chains are stretched. For this purpose, a very high tensile stress is required in the spinning and drawing steps, and the solution discharged during spinning and the intermediate stretched yarn must be able to withstand without breaking. Reducing the fineness means that the cross-sectional area of the solution or fiber is reduced, and it becomes impossible to withstand a high tension sufficient for drawing, and as a result, the solution / filament breaks.
  • the present inventors have studied diligently and succeeded in obtaining very fine and high-strength polyethylene fibers, which were difficult to obtain by such a method as the conventional gel spinning method. That is, an object of the present invention is to provide polyethylene fibers having high strength but extremely fine fineness. Disclosure of the invention
  • the first invention of the present invention is directed to a molecularly oriented fiber mainly composed of high-molecular-weight polyethylene whose repeating unit having an intrinsic viscosity [77] of 5 or more is ethylene, and the average fineness of a single fiber is 0.67 dtex or less.
  • the endothermic peak at the time of melting determined by the differential scanning calorimeter (DSC) is at least 2 at 140 ° C or more, and the temperature of the endothermic peak at the highest temperature is 150 ° C It is a high-strength polyethylene fiber characterized by exceeding.
  • the second invention of the present invention is the high-strength polyethylene fiber described above, wherein the molecular oriented fiber has a strength of 17.6 cN / dteX or more and an elastic modulus of 706.OcNZdtex or more. is there.
  • a third invention of the present invention is the above-described high-strength polyethylene fiber, wherein the molecularly oriented fiber is substantially a homopolymer having a high molecular weight polyethylene having an ethylene component of 99.5 m 0 1% or more.
  • a fourth invention of the present invention is the above-mentioned high-strength polyethylene fiber, wherein the intrinsic viscosity of the molecularly oriented fiber is 10 or more.
  • the fifth invention of the present invention is the above-described high-strength polyethylene fiber, wherein the average fineness of the single fiber of the molecularly oriented fiber is 0.05 to 0.33 dtex.
  • a sixth invention of the present invention is a nonwoven fabric comprising the above-described high-strength polyethylene fiber in a weight fraction of 3 to 95%.
  • a seventh invention of the present invention is the nonwoven fabric according to the above, wherein the high-strength polyethylene fiber has a cut length of 1 to 60 mm and is manufactured by a papermaking method.
  • a ninth invention of the present invention provides a woven fabric comprising the high-strength polyethylene fibers described above. It is a knitted fabric, wherein the thickness of the woven or knitted fabric is 150 "m or less.
  • a tenth invention of the present invention provides a woven or knitted fabric made of the above-described high-strength polyethylene fiber, which is impregnated with a resin so that the weight fraction becomes 10 to 20%, and a temperature of 145 ° C or less and a sufficient pressure are applied.
  • This is a shock-resistant composite member characterized by being integrated under
  • the eleventh invention of the present invention is characterized in that the high-strength polyethylene fiber described above is impregnated with an elastomer resin in a unidirectionally drawn state so that the weight of the elastomer resin is 15 to 20%, and the thickness is 50 ⁇ m.
  • An impact-resistant sheet member characterized in that an even number of the following sheets are laminated and integrated so that the directions of the fibers are orthogonal to each other.
  • the average denier of the single fibers of the high-strength polyethylene fibers in the present invention is 0.66 dtex or less, and it is preferable that the average denier be 0.05 to 0.33 dtex.
  • the effect on the fineness of the fiber becomes significantly smaller than that of the existing single fiber having a fineness of 1.1 dtex.
  • it exceeds 0.66 dtex the effect of reducing the thickness of the nonwoven cloth is not sufficient.
  • the fiber of the present invention has an extremely small average fineness, but according to conventional knowledge, its fiber properties are extremely low. However, for example, by employing the manufacturing method described later, it became possible to obtain fibers having the same strength and elasticity as conventional ones, despite having fineness.
  • the fiber of the present invention has a strength of 17.6 c NZd tex or more, an elastic modulus of 700.O c NZd tex or more, and more preferably 22.7 cN / dte. x or more, 8 18.2 cN // dtex or more.
  • the fibers having a very small average fineness of the single-weave fibers according to the present invention exhibit extremely different characteristics not only in fineness but also in structure as compared with conventional high-strength polyethylene fibers.
  • the first characteristic of the fiber according to the present invention is that the endothermic peak at the time of melting determined by a differential scanning calorimeter (DSC) is at least 140 ° C, preferably at least 2 to 142 ° C. There is a peak temperature of 150 at the highest temperature. C, preferably above 152 ° C.
  • DSC differential scanning calorimeter
  • 63-275708 discloses that a high-strength polyethylene fiber is obtained by using a special raw material such as copolymerization of ⁇ -olefin other than ethylene, and the fiber is made of aluminum powder.
  • peaks appear at high temperatures when DSC measurement is performed so that the fibers are in a state of tension by wrapping them around the fiber, and multiple endothermic peaks are observed. It is a well-known fact that, when DSC measurement is performed under the following conditions, a plurality of peaks due to a rise in melting point and, in some cases, crystal transition are generated.
  • the present invention is directed mainly to high-strength polyethylene fibers composed of a homopolymer having substantially only ethylene units, and the fibers are once cut to about 5 mm by the DSC measurement method of the present invention described later.
  • the measurement was made in an unconstrained state. Even under such conditions, a high-strength polyethylene fiber having a plurality of melting peaks at such a high temperature has not hitherto been known.
  • the reason why there are multiple melting peaks in the high-temperature region even in the unconstrained state is that the existence of a so-called extended chain crystal structure, which is different from ordinary polyethylene crystals, is due to such a high melting point. The peak is presumed to be indicative.
  • the intrinsic viscosity [7?] Of the high-molecular-weight polyethylene used as the raw material must be 5 or more, preferably 8 or more, and more preferably 10 or more. It is. It becomes difficult to obtain a fiber having an intrinsic viscosity of less than 5, exceeding the originally desired value of, for example, 17.6 cN / dtex and having a single fineness of 0.66 dtex or less.
  • the main component of the polymer is substantially a homopolymer of polyethylene having an ethylene component of 99.5 mol 1% or more, preferably 99.8 mol% or more. It is recommended that 1% of ethylene be used as a 1 O Omo 1% raw material except for branches and terminals added or formed in small amounts for the purpose of improving the rate of polymerization and side reactions of polymerization.
  • such a high-molecular-weight polyethylene is converted to a volatile solvent such as decalin or tetralin, or a non-volatile solvent such as burafin or solid paraffin.
  • a volatile solvent such as decalin or tetralin
  • a non-volatile solvent such as burafin or solid paraffin.
  • the concentration is 50% or less, preferably 30% or less. It is important to note that the solution is a volatile solvent.
  • the limit of room temperature solids or non-volatile solvents is practically around 3.3 dtex, and it is impossible to obtain monofilaments with a low fineness of 0.66 dtex or less. The reason for this is that the use of volatile solvents The solvent on the surface evaporates more aggressively.
  • the plurality of endothermic peaks and their values at high temperatures in the DSC measurement of the fiber of the present invention mainly correspond to the extended chains existing in the skin layer, it is uncertain.
  • the special structure such as the fiber of the present invention or the obtained thermal property is not only that the fineness of the single fiber of the fiber according to the present invention is low, but also that it has excellent heat resistance and a special surface.
  • the rigidity is expected to improve the impact propagation speed, and by laminating it, it is possible to realize a light-weight bullet-proof trowel with improved shock absorption. Can be expected to be applied in various fields.
  • the good crystallinity of the fiber surface gives them better chemical durability, and the fiber becomes extremely poor.
  • the thinner separator allows the thickness of the separator to be reduced, and it goes without saying that there is an advantage that the performance of the product can be improved.
  • the high-strength polyethylene fibers according to the present invention have a cut length of 1 to It is cut so as to have a length of 60 mm, and the obtained short fibers can be produced by a papermaking method. It is desirable that the obtained nonwoven fabric has a thickness of 100 to 200 "m and a basis weight of 5 to 100 g Zm2 as a nonwoven fabric for a battery separator.
  • the high-strength polyethylene according to the present invention is also preferable.
  • the low single fineness, high impact propagation speed and physical properties that are the characteristics of the fibers are also very effective in improving ballistic performance.
  • the ultra-fine high-strength polyethylene fibers according to the present invention can easily produce a homogeneous fabric-sheet material more easily than conventional high-strength polyethylene fibers.
  • the high impact propagation speed of the high-strength polyethylene fiber makes it possible to diffuse the shock wave generated at the time of collision into a wider range, which also greatly contributes to the improvement of the bulletproof performance.
  • strong polyethylene fiber When manufacturing the fiber according to the present invention, first, it is important to design a nozzle that uniformly extrudes the fiber.
  • the diameter of the nozzle port is 0.5 mm or less, more preferably 0.
  • the most important factor in the present invention is to forcibly supply a high-temperature inert gas to the solution discharged from the nozzle to actively evaporate the solvent on the yarn surface. This makes it possible to form a thin skin layer on the surface, withstand the tensile strength of spinning, and to provide a smooth molecular orientation by stretching.
  • the temperature be at least 60 ° C, preferably at least 80 ° C, and more preferably at least 100 ° C. In this case, it is recommended to use inert gas such as nitrogen.
  • the fiber thus obtained is heated again, stretched several times while evaporating the remaining solvent, and may be stretched in multiple stages in some cases.
  • the heat resistance derived from the skin / core structure once formed by spinning does not disappear in the subsequent drawing, and a new fiber having the above-mentioned extremely excellent properties can be obtained.
  • the strength and elastic modulus in the present invention were measured by using a Tensilon manufactured by Orientec, using a strain-stress curve under the conditions of a sample length of 200 mm (length between chucks) and an elongation rate of 100% Z. Measured at a temperature of 20 ° C and a relative humidity of 65%, calculate the stress at the break point of the curve (cN / dtex), and calculate the elastic modulus (cNZdtex) from the tangent line that gives the maximum gradient near the curve origin. I asked. In addition, each value used the average value of the measured value of 10 times.
  • the differential scanning calorimeter measurement was performed using “DSC 7” manufactured by PerkinElmer Inc.
  • a sample (fiber) cut to 5 mm or less in advance is filled and sealed in an aluminum pan at about 5 mg, and a similar empty aluminum pan is used as a reference at a heating rate of 10 ° C / min.
  • the temperature was raised from room temperature to 200 ° C under an active gas, and the endothermic peak was determined. From the obtained curve, the number of melting peaks and the temperature of the hottest peak were determined.
  • the temperature was set to 230 ° C while dispersing a slurry-like mixture of 10 wt% of the ultra high molecular weight polymer (C) with an intrinsic viscosity of 20.1 and 90 wt% of decahydronaphthalene in a slurry.
  • C ultra high molecular weight polymer
  • the temperature was set to 230 ° C while dispersing a slurry-like mixture of 10 wt% of the ultra high molecular weight polymer (C) with an intrinsic viscosity of 20.1 and 90 wt% of decahydronaphthalene in a slurry.
  • Spinning was carried out in the same manner as in Example 1, except that a polymer having an intrinsic viscosity of 10 was used as the main component polymer and the viscosity of the solution was 30%.
  • the ultra-fine high-strength polyethylene fibers prepared in Example 1 were cut into 6 mm, and mixed with synthetic pulp SWP (L-100, manufactured by Mitsui Chemicals, Inc.) at a mass of 3: 7.
  • the mixed fibers were made into a nonwoven fabric by a papermaking method.
  • the obtained nonwoven fabric was combined with a polypropylene meltblown nonwoven fabric having a basis weight of 20 gZm 2 by calender treatment at 110 ° C. to obtain a nonwoven fabric having a total basis weight of 55 gm 2 and a thickness of 140 mm.
  • the obtained nonwoven fabric was subjected to a sulfonation treatment in a sulfurous acid gas atmosphere, and the battery performance was evaluated. There were no holes or other troubles during the battery installation process, and the battery capacity retention was good.
  • Example 2 Using the extra-fine high-strength polyethylene fibers prepared in Example 1, plain weaves with a weaving density of 48/25 mm were prepared. The basis weight of the woven fabric was 94 gZm, and the thickness was 0.14 ⁇ m. The woven fabric was cut into a square having a side of 20 cm, and one piece of the woven fabric was overlapped and overlock-stitched around the perimeter to prepare a ballistic performance test sample. Table 2 shows the ballistic performance.
  • Example 4 Add ME KZ methanol (1: 1) to the plain fabric created in Example 4 A resin (mixture of Epicoate 828 / manufactured by Yuka Shell Co., Ltd.), a curing agent (diciandiamide), and an accelerator (urea-based compound) were dissolved so that the weight fraction of the resin became 18%. Impregnation and drying were performed to prepare a prepredder. This prepreg was cut into a square with a side of 20 cm and nine pieces were superimposed and kept for 30 minutes under a pressure of 50 MPa by a hot press at 130 ° C to prepare a sample for a ballistic performance test. . Table 2 shows the ballistic performance.
  • the ultra-fine high-strength polyethylene fibers prepared in Example 1 were spread out at a rate of 200 fibers per 20 cm, aligned and aligned, and dissolved in toluene. Ton D 1107) was impregnated so that the weight fraction of the resin was 18%, and was heated and dried to prepare a unidirectionally aligned sheet. Sheets made in the same manner are stacked in four layers so that the directions of the fibers are orthogonal to each other, and a 10-m-thick film made of low-density polyethylene is laminated on the top and bottom and hot pressed at 110 ° C. The sheet was held at a pressure of 50 MPa for 30 minutes. The basis weight was 120 g / m. Eight laminated sheets thus obtained were stacked to obtain a ballistic performance test sample. Table 2 shows the ballistic performance.
  • Example 1 In the experiment of Example 1, the application of hot air in the gas slit immediately below the nozzle was stopped, and cooling was immediately performed with nitrogen gas at 30 ° C. The maximum spinning speed was 20 m / min, and the subsequent stretching was 2.0 times for single-stage stretching and 2.2 times for 2-stage stretching. The physical properties thus obtained are shown in Table 1. The single fiber degree was 0.9 ldtex and the desired ultrafine fiber of 0.66 dtex or less could not be obtained.
  • Example 1 The polymer of Example 1 was converted to an intrinsic viscosity of 20.1 and a propylene monomer. The same operation was performed using ultrahigh molecular weight polyethylene copolymerized with 1 mo 1%. Under the same conditions, yarn breakage during spinning frequently occurred, and satisfactory spun yarn could not be obtained.
  • the average single fineness is 1. ldtex.
  • a ballistic test sample was prepared using the method.
  • the fabric weight was 89 gZnf and the thickness was 0.17 ⁇ m. Table 2 shows the ballistic performance.
  • a ballistic performance test sample was prepared in the same manner as in Example 4 except that the plain fabric prepared in Comparative Example 3 was used. Table 2 shows the ballistic performance.
  • the average single size is 1.ldtex.
  • the total number of layers is 9 using normal high-strength polyethylene fibers (Dyneema SK60, manufactured by Nippon Dainippon Co., Ltd.) with a total size of 222 dtex.
  • a ballistic-proof performance test sample was obtained in the same manner as in Example 7, except that the test was performed. Table 2 shows the ballistic performance.
  • Example 4 1030gZm 2 31. 2J / (kg / m)
  • Example 5 1020g / m 21. 8J / ( kg / m)
  • Example 6 960g / m 20. 1J / ( kg / m) Comparative Example 3 980gZm 2 27 3J / (kg / m) Comparative Example 4 980g / m 19.7J / (kg / m) Comparative Example 5 990g / m 19.2JZ (kgZm 2 )

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Artificial Filaments (AREA)

Abstract

Fibre de polyéthylène extrêmement résistante comprenant en tant qu'élément principal, un polyéthylène présentant un nombre élevé de molécules et contenant des unités répétées dérivées d'éthylène et possédant une viscosité limitée θ égale ou supérieure à 5, présentant une orientation moléculaire, possédant une finesse moyenne de fibre égale ou inférieure à 0,66 dtex, possédant au moins deux crêtes d'absorption de chaleur à des températures égales ou supérieures à 140 °C, mesurées au moyen d'un calorimètre à balayage différentiel (DSC), à condition qu'une crête d'absorption possédant la température la plus élevée soit présente au-dessus de 150 °C; non-tissé conçu pour un séparateur de cellule électrique composé d'une fibre courte de polyéthylène extrêmement résistante et possédant une épaisseur spécifique et METSUKE; élément résistant au choc composé d'un textile tissé ou tricoté comprenant le polyéthylène extrêmement résistant et possédant une épaisseur spécifique; élément composite résistant au choc composé du textile tissé ou tricoté imprégné d'une résine ou intégré à une résine; feuille résistant au choc. Nouvelle fibre de polyéthylène présentant un diamètre extrêmement réduit et également une résistance et un module d'élasticité élevé, ainsi qu'une résistance thermique importante; non-tissé, y compris non-tissé pour séparateur de cellules électriques, élément résistant au choc et éléments analogues mettant en application la fibre de polyéthylène.
PCT/JP2000/000637 1999-02-05 2000-02-04 Fibre de polyethylene extremement resistante et non-tisse pour separateur de cellules electriques et element resistant au choc WO2000046436A1 (fr)

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JP11/28817 1999-02-05
JP11028817A JP2000226721A (ja) 1999-02-05 1999-02-05 高強度ポリエチレン繊維

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002048436A1 (fr) * 2000-12-11 2002-06-20 Toyo Boseki Kabushiki Kaisha Fibre en polyethylene haute resistance
EP2119740A1 (fr) * 2008-05-15 2009-11-18 Xerox Corporation éléments résistants à précision et procédé de fabrication associé

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002298817A (ja) * 2001-03-29 2002-10-11 Sanyo Electric Co Ltd アルカリ蓄電池およびその製造方法
WO2009077168A2 (fr) * 2007-12-17 2009-06-25 Dsm Ip Assets B.V. Procedé de filage d'uhmwpe, fils multifilaments d'uhmwpe ainsi produits et leur utilisation

Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS61102412A (ja) * 1984-10-23 1986-05-21 Kuraray Co Ltd 高強力ポリエチレン用紡糸原糸の製造法
JPH01162816A (ja) * 1987-12-17 1989-06-27 Toray Ind Inc 新規なポリエチレン繊維
JPH01272842A (ja) * 1988-04-21 1989-10-31 Mitsui Petrochem Ind Ltd 高強力ポリエチレンマルチフィラメント糸条体の製法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61102412A (ja) * 1984-10-23 1986-05-21 Kuraray Co Ltd 高強力ポリエチレン用紡糸原糸の製造法
JPH01162816A (ja) * 1987-12-17 1989-06-27 Toray Ind Inc 新規なポリエチレン繊維
JPH01272842A (ja) * 1988-04-21 1989-10-31 Mitsui Petrochem Ind Ltd 高強力ポリエチレンマルチフィラメント糸条体の製法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002048436A1 (fr) * 2000-12-11 2002-06-20 Toyo Boseki Kabushiki Kaisha Fibre en polyethylene haute resistance
EP1662025A2 (fr) * 2000-12-11 2006-05-31 Toyo Boseki Kabushiki Kasisha Fibre de polyéthylène à haute ténacité
EP1662025A3 (fr) * 2000-12-11 2006-08-09 Toyo Boseki Kabushiki Kasisha Fibre de polyéthylène à haute ténacité
US7141301B2 (en) 2000-12-11 2006-11-28 Toyo Boseki Kabushiki Kaisha High strength polyethylene fiber
EP2119740A1 (fr) * 2008-05-15 2009-11-18 Xerox Corporation éléments résistants à précision et procédé de fabrication associé
US8349421B2 (en) 2008-05-15 2013-01-08 Xerox Corporation Precision resistive elements and related manufacturing process
US8518506B2 (en) 2008-05-15 2013-08-27 Xerox Corporation Precision resistive elements and related manufacturing process

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