MXPA97008964A - Fiber resistant to cuts that has full - Google Patents

Abstract

The present invention relates to fiber having increased cut resistance, it is made from a fiber-forming polymer and a hard filler having a hardness value of Mohs of more than about 3, the filler is included in an amount of about 0.05% to about 20% by weight, in preferred embodiments, the fiber-forming polymer is polyethylene terephthalate or a liquid crystalline polyester comprising monomer units derived from 6-hydroxy-2-naphthoic 4-hydroxybenzoic acid, preferred fillers include tungsten and alúmi

Description

FIBER RESISTANT TO CUTS THAT HAS FILLER CONTINUATION REQUEST DATA This application is a continuation in part of the application of E.U.A. co-pending 08 / 243,344, filed May IB of L994, which is a continuation on par + e of the F -:. U..n. 07 / 980,813, filed on November 24, 1992, now abandoned; and it is also a continuation in part of the request of E.U.tt. Copending No. 08 / 482.20 ?, filed on June 7, 1995. The applications of E.U.A. Nos. 08 / 484,544 and 08 / 481,020, both filed on June 7, 1995, which are divisions of the application of E.U.A. No. 08 / 243,344, also contain related material.

FIELD OF THE INVENTION This invention relates to fibers made from polymers containing hard particles having improved cut resistance.

BACKGROUND OF THE INVENTION (? e has looked for improved resis + ency to cor + es with a sharp edge.) The yuan + is resis + ates to cor + es are used charitably in the meatpacking industry and in au + ormobile api ications As indicated by the patents of I - UA Nos. 4,004,205, 4,304,449 and 4,4 / 0,251, and by 1JP <J> 8,3 /? 3, the gloves exhibiting resistance to cuts are They have made from H which includes l wire (lexible or consisting of highly oriented fibers that have high modulus and high tensile strength, such as arsenic fibers, liquid crystalline polymers, and exotic polyethylene. A disadvantage with the gloves made of wire that includes flexible wire is tired for the hands with reduced productivity and increased probability of damage.Also, with extensive use and bending, the wire can be fatigued and break, causing cuts and hand rubs.Also, the wire will act as a collective or heat when a washed glove is dried at elevated temperatures, which can reduce the tensile strength of the yarn or fiber, thus reducing glove protection and glove life. Improved flexibility and comfort are desired and uncomplicated laundry in protective clothing, resistant to cuts. Therefore, a flexible, cut-resistant fiber is needed that retains its properties when washed routinely. Said fiber can be used enia to make protective gloves, in particular highly flexible, resistant to cuts. They have mixed polymers with particulate matter and made into fibers, but not in a way that significantly improves fiber cut resistance. For example, small amounts of titanium oxide of μar + icula have been used in polyester fiber as an opacifier. A small amount of colloidal silicon dioxide, which is used to improve luster, is also used in the polyester fiber. Magnetic materials have been incorporated into the fibers to produce magnetic fibers. Examples include; Cobalt / rare alkaline ls in thermoplastic fibers, as in Japanese Patent Application No. 55/098909 (1980); mterto the cobalt eos / rare alkali ls or strontium ferpto in almadone fibers, described in Japanese Patent Application Laid-open No. 3-130413 (1991); and magnetic materials in thermoplastic polymers, described in Polish Patent No. 251,452 and also in K. Turek, et al., 3. aqn. riagn riater (1990), 83 (1-3), pp. 279-280. It r > It has made several kinds of gloves where l has been included in the manufacture of the glove to impart protective qualities to the glove. For example, the Patents of E.U.A. Nos. 2,328,105 and 3,185,751 teach that a flexible glove with an X-ray shield can be made by raking sheets of a suitable porous material with a finely divided heavy l which can be piorne, barium, bismuth or tungs ene, or it can be made of a latex or dispersion containing heavy l particles. As illustrated by the U.S. Patent. No. 5,020,161, gloves have been made that provide protection against corrosive liquids with a layer of l film. These gloves also do not appear to have significant and improved resistance to cuts.

BRIEF DESCRIPTION OF THE INVENTION A fiber and thread resistant to cuts on the basis that the fibers are made of a fiber-filled polymer including a hard filler evenly distributed in the fiber. The hard filler has a hardness value Tlohs greater than about 3 and is present in an amount of about 0.05% to about 20% by weight. The fiber has cut resistance properties that improve at least 10% compared to the same fiber without the hard filler as determined by the Ashland Cut Protection Function Test, described later. Also, a method to make cut resistant fabric is taught. In this method, a blend of a fiber forming polymer is made and from about 0.05% to about 20% by weight of a hard filler having a Mohs hardness value greater than about 3. The uniform blend is spun into a fiber or yarn, which is then manufactured into fabric having improved cut resistance compared to the fabric made of the same fiber-forming polymer without the hard filler. The cut-resistant fabric may also optionally include other polymeric fibers and / or inorganic reinforcing fibers, which may be ceramic, metal or glass.

It also describes a new method to make a synthetic fiber or yarn more resistant to cuts with a sharp edge, r-1 improved method comprises the step of including a hard filler that has a Mohs hardness value greater than 3 in the fiber or yarn. Synthetic material in sufficient quantity to improve protection of cuts of fiber or yarn by at least 20%, and preferably at least 35%, as indicated by the Ashland Court Protection Functioning Test. Is this achieved by? < > In general, make a uniform mixture of the mixed polymer or liquid solution (acetate solution) and then spin the molten polymer or polymer solution (acetate solution) into a fiber or yarn. which has improved cutting protection performance. The preferred mixture is melt spinning. The fibers and yarns described above can be made into fabrics having improved cut resistance using any of the methods currently used to make fibers and lulos into fabrics, including knitting and knitting. The fibers and yarns can also be made in non-woven fabrics having improved cut resistance. Both the fabrics and the methods for making fabrics resistant to cuts and the resulting fabrics are novel. In addition, cut-resistant fabrics are made in apparel with improved cut protection, such as gloves that are resistant to slicing with a knife.

DETAILED DESCRIPTION OF THE INVENTION As noted above, a flexible fiber resistant to cuts useful for the manufacture of protective clothing can occur when a hard filler is included in the fiber. The fiber can be made of any fiber-forming polymer, and can be produced by any of the methods normally used in the manufacture of fibers. The preferential polymer can be processed by rushing, in which case, the cut-resistant fiber is typically made by melt spinning. For polymers that can not be spun into fibers in the melt, wet spinning and dry spinning can also be used to produce fibers having improved cut resistance. Amorphous polymers, serine polymers and liquid crystalline polymers can be used in this invention. Of these, liquid and crystalline polymers are preferred. The description of this invention is written with respect to the fibers. The term fiber includes not only conventional individual fibers and filaments, but also yarns made from a multiplicity of these fibers. In general, threads are used in the manufacture of costumes, fabrics and the like. In a preferred embodiment of this invention, the fiber-forming polymer is an isotropic serni-crystalline polymer. "Isotropic" means polymers that are not liquid crystalline polymers, which are not otropic. Preferably, the isotropic statin polymer can be processed by fusion; that is, it melts on a temperature scale that makes it possible to spin the polymer into fibers in the melting phase without significant decomposition. The serni-crystalline polymers that will be highly useful include polyalkylene terephthalates, polychlorinated naphthalates, wood sulfur polyols, aliphatic polylaids, and fatigue-aromatic polymers, and polyesters that comprise monoprene units derived from cyclohexanedimethanol. and aculo ter phthalic. Examples of specific polymer polymers include polyethylene terephthalate, polybutylene terephthalate, filled polyethylene naphthalate, polyphenylene sulfur, polyethylene terephthalate, 4-cyclohexanedirithanol, wherein 1,4-c-chlorhexanod? Methanol is a mixture of cis and trans isomers, nylon-6 and nylon-66. Polyolefms, particularly polyethylene and polypropylene, are other serine polymers that can be used in this invention. The extended chain polystyrene, which has a high tension modulus, is made by spinning in gel or spinning by melting polyethylene-filled high molecular weight or higher. The extended chain polyethylene already has a cut resistance, but can be made even more resistant to cuts by adding particles to the fiber in accordance with this invention. All of the above polymers are known to be useful for making fibers and are commercially available. The preferred serpentine-crystalline isotropic polymer is filled polyethylene terephthalate. Polymers that can not be processed in the melt, such as rayon and cellulose acetate, for example, which are typically spun dry by using acetone as a soiven + e, and pol? C2'2, (m) can also be used. phenylene) -5 '5-d? benzym dazo 3, generally referred to as polybenznidazole, which is wet-spun typically using N, N'-dirnetylacetarin as a solvent. The aromatic pollamides other than the acid polymer t ere fta 11 co and pfengine 1 emine (for example, polymorphs and terephthalic acid and one or more aromatic diammas) can are soluble in polar aprotic solvents, such as N-rneti ip? It can be spun in wet with aggregate particles to produce cut-resistant fibers. The isotropic, non-crystalline, amorphous polymers, such as the copolymer of isophthalic acid, tertiary acid and bisphenol A (polyplate) can also be filled and used in this invention. In another preferred embodiment, the fiber is made of a liquid crystalline polymer (LCP). The LCPs give fibers with resistance to and / or voltage modulus rnuy high. The liquid crystalline polymer can be processed in the melt (ie, terrnotropic), in which case melt spinning is the preferred method for making the fiber. However, polymers exhibiting liquid crystalline behavior in solution can be mixed with a hard filler and then wet or dry can be spun to produce resistive fibers in accordance with the present invention. For example, the aromatic polyamide made from μ-phenylenediamine and therophthalic acid (such as, for example, the polymers sold under the registered name KlrVLHRR) can be filled and wet-spun (i.e., by wet spinning by dry blasting a concentrated sulfuric acid solution) to produce a fiber resistant to shorts, as long as the hard filler does not react with or dissolve in the solvent. Other aromatic polmides which are soluble in polar, suitable solvents, such as' N-met i ipirrolidinone, can also be spun into cut-resistant fibers according to the present invention. See Example 10. These can not be crystalline liquids under some or all conditions, but still produce high modulus fibers. Some may exhibit liotropic liquid crystalline phases at some concentrations and in some solvents, but isotropic solutions at other concentrations or in other solvents. The liquid crystalline polymers (LCPs) preferred for use in this invention are LCPs termi- nal ropíos. These terrnotropic LCPs include aromatic polyesters, aliphatic-arornatic alcohols, aromatic polyesteranides, polystyrene, aromatic polymers, aromatic polycar- nates, aliphatic polyarnides and polyazorneti- nals. The preferred thermophobic LCPs are aromatic polyesters and polyesteramides which form liquid crystalline melting phases at temperatures of less than about 360 ° C and include one or more monoinero units derived from terephthalic acid, io phthalic acid, 1, 4-h? Droquinone, resormyol, 4'4-dihydroxy-benzyl, acid-4-carboxylic acid, 4-hydroxybenzoic acid, 0-hydroxy-2-naphthoic acid, 2,6-naphthalenedicarboxylic acid, 2, 6-d ihydroxy na taleno, 4-a? Nofenol, and 4-arn? Nobenzo? Co acid. Some of the aromatic groups may include substituents which do not react under the polymerization conditions, such as lower alkyl groups which have 1-4 carbons, aromatic graphs, F, Cl, Br and J. The synthesis and structure of some typical aromatic polyester are taught in the Patents of E .. U.A. Nos. 4,473,682; 4,522,974; 4.3 / 5.530; 4,318,841; 4,256,624; 4,161.4 / 0; 4,219,461; 4,083,829; 4,104,996; 4,279,803; 4,337,190; 4,355,134; ,429,105; 4,393,191; and 4,421,908. The synthesis and structures of some typical aromatic polyesteranides are taught in U.S. Patents. Nos. 4,339,375; 4,355,132; , 351, 917; 4,330,457; 4,351,918; and 5,204,443. Aromatic liquid crystalline and polycarbonate polyesters are available from Hoechst Celanese Corporation under the registered trademark VECTRA *, as well as other manufacturers. The preferred liquid crystalline polyester comprises repeat units derived from 4-hydroxybenzoic acid and B-hydroxy-2-naphthoic acid, as taught. • > rx in the patent of E.U.A. No. 4,161,470. Preferably, the rnonorher units derived from 4-hydroxybenzoic acid 1 they comprise from about 5% to about 85% of the polymer on a molar basis-, and the monomer units derived from 6-hydroxyl-2-naphthoic acid comprise from about 85% to about 15% of the polymer on a molar base. Preferably, the polymer comprises about 73% monomer units derived from 4-hydroxybenzoic acid and about 27% monomer units derived from hydroxy-2-naphtho acid. Co, on a molar basis. This polymer is available in fiber form under the registered VECTRAN * name of Hoechs-t Celanese Corporation, Charlotte, North Carolina. Other preferred polyether or polystyrene liquid crystalline polymers comprise the monomer units mentioned above derived from 6-hydroxy acid? -2- naphtho-co and 4-hydroxybenzoic acid, as well as the monomer units derived from one or more of the following monomers: 4'4-d? H? Drox? B? Phenol, acid rephtalic and 4-arn? Nofenol. A preferred polyester comprising these monoinero units is derived from 4-hydroxybenzoic acid, B-hydroxyl-2-naphthoic acid, 4'4-b? enol and tere itic acid, as taught in the U.S. Patent. No. 4,473,682, with the polymer comprising these molar units in a molar ratio of about 60: 4: 18: 18 being particularly preferred. A preferred polyesteranide comprises monomer units derived from 4-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, rephtalic acid, 4,4'-β-phenol and 4-hydroxybenzoic acid. -arnmofenol, as taught in the US Patent No. 5,204,443; a highly preferred composition comprises these monomer units in a molar ratio of about ñ0: 3.5: 18, .25: 13.25: 5. An important aspect of this invention is the discovery that a flexible, tension-resistant, cut-resistant fiber can be made from a suitable polymer with filler with a hard material that imparts a resistance to cuts. The material can be a metal, such as an elemental metal or metal alloy, or I can be non-metallic. Generally, any filler may be used that has a Mohs hardness value greater than about 4 and preferably greater than about 5. The iron, steel, tungsten and nickel are illustrative of metal and metal alloys, with tungsten- eno, which has a Mohs hardness value that varies from around 6.5 to .5 being preferred. Non-metallic materials are also useful. These include, but are not limited to, metal oxides, such as aluminum oxide, metal carbides, such as tungsten carbide, metal trunches, metal sulphides, metal silicates, metal silicides, metal sulphates, phosphates from metal, and metal borides. Other examples include silicon dioxide and silicon carbide. Other ceramic materials can also be useful. Titanium dioxide and silicon dioxide are preferred compounds in stannous serni-cp polymers. The particle size, particle size distribution, and the amount of particles are parameters? rn? or-t before to obtain good resistance to cuts at the same time preserving the mechanical properties of the fiber. A filler-particle form can be used, with a powder form generally being adequate. Flat particles (ie, platelets) and elongated particles (needles) can also be used. For particles that are flat or elongated, the particle refers to the length on the long axis of the particle (i.e. the long dimension of an elongated particle or the average diameter of the face of a platelet). The selection of an appropriate particle size depends on the processing and diameter of the fiber. The filler particles must be small enough to easily pass through the spinner openings. The particles must be small enough so that the tensile properties of the fiber do not deteriorate appreciably. For textile fibers, (i.e., fibers having a denier on the scale of about 1.5 to about 15 dpf), the particles should be filtered or sieved in such a way that large particles of about 6 microns are excluded. In general, the particles should have an average diameter of less than about 20 microns, preferably in the range of about 0.05 to about 5 microns and in specific cases, from about 0.2 to about 2 microns. For elongated particles, the long dimension must fit through the holes in the spinner. Therefore, the average particle length of an elongated particle must be less than about 20 microns, and preferably it is in the range of about 0.05 to about 5 microns and in specific cases, of about 0.02 to 2 microns. The above is a general rule with respect to polymers with filler in general. Further experimentation on hard particles in isotropic polymer seini-crystalline thermoplasti co indicates that at least par-us isotropic polymers and in particular par- to the mode more than expected (calcined alumina in PET), the particle size scales that produce L best- resistance to cor + s are from about 0.25 to about 10 microns, preferably from about 1 to about 6 microns, and most preferred to about 3 microns. The particle size must have a normal distribution of log. A smaller percentage of the hard filler is used. The amount is chosen to produce improved cut resistance without causing a significant loss of tension properties. The cut resistance of the fiber or fabric made of the fiber is improved, preferably by at least 10%, using the Ashland cut protection performance test or other tests generally accepted in the industry. Preferably, the cut protection measured by these tests, and in particular the Ashland cut protection test, will be improved by at least 20%, preferably by at least 35% and most preferred by at least 50%. %.

Said tests as applied to the liquid crystalline polymer fibers are described in Example 3, and as applied to isotropic polymer fibers and LCP's are described in Example 4. The tensile properties of the fiber (toughness and modulus) they should not decrease by more than approximately 50% and preferably should not decrease by more than approximately 25%. Most preferred, there will be no significant change in stress properties (ie, less than about?% Of production on properties). On a weight basis, the filler is present in an amount of from about 0.05% to about 20%, preferably from about 0.1% to about 20%. On a volume basis, the amount of filler is typically in the range of about 0.01% to about 3%, often in the range of about 0.03% to about 1.5%, and in specific cases may be in the scale of about 0.05% to about 1%, with the proviso that the amount of the filler is within the weight scales mentioned previously. Thus, for a dense filler, such as polyethylene terephthalate tungsten powder, the amount of the filler corresponding to the volume percentages mentioned above but expressed on a weight basis, is typically on the scale of about 0.14% at about 20%, preferably on the scale of about 0.42% to about 20%, and most preferred on the scale of about 0.07% to about 14%. For PET, good cut-resistant properties are obtained with about 0.7 volume% of the tungsten filler, which corresponds to about 10% by weight. For the liquid polymers, errotropic liquid dressings, improved cut resistance can be obtained with a yield of about 0.07% to about 0.14% by volume of the filler, which corresponds to about 1% to about 2% by weight when the filler- It is tungsten. Further experimentation with isotropic stalinos sermon polymers indicates that a better calculation of the required particle quantity scales to achieve high cut resistance is as follows: on a volume basis, the concentration of the particle level is preferably in the scale from about 0.1% to about 5% by volume, preferably from about * 0.5% to about 3% by volume and about 2.1% by volume preferred. For the most preferred mode (calcined alumina in PET), these scales on a weight basis are from about 0.3% to about 14% (preferred), from about-1.4% to about 8.5% (most preferred), and about 6% (rnuy preferred). In accordance with the present invention, the filler fibers are prepared from a resin with filler. The resin with filler is made by any of the normal methods to add a filler to a ream. For example, for a thermoplastic polymer, the filler resin is conveniently prepared in an extruder, such as a twin screw extruder, by mixing the hard filler with the molten polymer under conditions sufficient to provide uniform distribution of the filler in the extruder. ream. The liner may also be present during the manufacture of the polymer or may be added as the polymer is fed into the extruder of the fiber spinning equipment, in which case the mixing and spinning steps are almost simultaneous. Since the filler is distributed uruforrnemente in the fusion of the polymer, the particles of the filler are also typically distributed uniformly along the fibers, except that the elongated and flat particles are oriented to some degree due to the forces of orientation dur 'before the spinning of the fiber. Some migration of the particles to the surface of the fiber may also occur. In this way, although the distribution of the particles in the fibers is described as "uniform", the word "uniform" should be understood to include non-uniformities that occur during the processing (eg, melt spinning) of a uniform polymer mixture. Said fibers would fall within the scope of this invention. A fiber of any size could be made in accordance with the present invention. In the manufacture of fabrics and yarns, the fiber will generally have a denier * on the scale of about 1 to about 50 dpf, preferably on a scale of about 2 to about 20 dpf, and preferably about 3 at approximately 15 dpf. For the isotropic polymers, and in particular for PET with filler the most preferred scale of fiber size is from about 1.5 to about 15 dpf, and most preferred about 4 dpf. Straight-resistant mono filaments can also be made to include a hard filler. Non-ionics usually have a diameter of about 0.05 to approximately 2 nm. Fibers are made by conventional fiber spinning processes. The preferred process is melt spinning, but wet spinning and dry spinning can also be used. The corresistant fabric can be made by knitting, stitching, or by other methods using a fiber with filler according to the present invention using conventional methods and machinery. You can also make non-woven fabrics. Said fabrics will have improved cut resistance compared to the same fabric made using fiber manufactured from the polymers ism without a filler. Generally, the cut resistance will improve by at least about 10% when measured using the generally accepted industry tests to measure * cut resistance (the Ashland cut protection test), and preferably improve at less by approximately 20%, 35% or 50%. The cut resistant clothing can then be made from the cut resistant fabric described above. For example, a safe cut-resistant glove designed for use in the food processing industries can be manufactured from cloth. Said glove is highly flexible and can be cleaned quickly. The fiber with filler-issis + e stress fatigue. Protective rubber gloves can also be made using the current r-cut fibers of this invention. These protective gloves can be sewn from a fabric (woven, spun, or non-woven) that is roasted from the fibers and yarns taught in the foreground. Alternatively, the gloves may be knitted directly from continuous threads comprising the fiber, or pieces of cloth may be added to the gloves to protect portions of the hand that are at greater risk of being damaged (eg, palms or fingers)., Other uses of fabrics without mono fi lms include side curtains and truck tarpaulins, soft-sided luggage, commercial carpets, things that can be inflated, fuel cells, collapsible packaging, airline cargo curtains, hose covers, heavy-duty aprons to cuts for use in metal packaging, plate, etc. The cut-resistant fiber materials described herein may also be replaced by * filler-free polymer fibers * in cut resistant fabrics, gloves and the like made by conventional methods to give greater cut resistance. In this way, a cut resistant fabric using the filler fiber taught herein that is further reinforced by including an inorganic reinforcing fiber such as metal, glass or ceramic fiber, in accordance with current technology must have a resistance to cor + is a greater * than the same fabric using a conventional fiber. Said fabrics can be made from mixed body yarns made of strands of the fiber with filler described in the present interleaved with strands of the reinforcement fiber of metal., glass or ceramic, or fiber strands with filler combined with fiber strands of metal, glass or ceramic, with or without a twist. Alternatively, the reinforcing fiber may be present as a core surrounded by the cor + s-resistant fibers described herein, or the reinforcing fiber may be wrapped around a core comprising the fiber that is resistant to cor + es with filler described at the moment. Mixed-body retentive yarns of conventional fibers and reinforcing fibers are well known to those skilled in the art and can readily be adapted to use the fibers with a lumberjack-taught herein as a substitute for conventional ribs. . "Strands of the body" is an expression that is often used to describe threads that are made by combining 2 different threads, either with or without a twist. Mixed body yarns as defined above are also known in commerce as "combination yarns".

Example 1 PREPARATION OF LCP WITH FILLER A LCP that can be processed by melting is prepared with a tungsten powder filler as described now. A LCP (pellet form) (95% by weight) manufactured under the registered trademark VLCTRAR A910 (from Hoechst Celanese Corporation) and po or tungsten (average particle size, 0.5 micron, 5% by weight) are dried at a temperature about 100 ° C and then mixed. The resulting mixture is added to the hopper of a vibrating feeder of a Werner extruder and Pfleiderer 28 rnrn ZSK (double nut), based on a vibrating channel, and fed into the extruder. The extruder, channel and throat are under a positive nitrogen flow. Polymer melt at a temperature of 305-310 ° C containing particle tungsten exits the extruder in two strands and passes through a bath in water. Afterwards, the cooled strands are fed in a pellet form, and the pellets pass through a number 4 sieve to remove the pellets with "glue". To ensure a uniform distribution of the particle filler, the pellets with filler are fed into the extruder and the procedure is repeated.

Example 2. PREPARATION AND EVALUATION OF LCP FIBER WITH FILLER The fiber with filler was melted from the VECTRA polymer composed with 1% by weight of tungsten metal powder, as described now. Chips are fed into the hopper of a conventional extruder, and polymer melt at a temperature of about 320 ° C containing particle tungsten exits the extruder. The mixture passes to a metering pump (speed of bornba, 23 rprn; 0., b04ec / rovoi ucion), then through a conventional filter packing that includes a mesh of the spinner '15 -25 micras), and through of a spinner (hole count, »0; hole diameter, 0.012 /; hole length, 0.C1778crn). The resulting filaments converge in a lubricant guide and in an absorption roller (609.60 rn / rnin), which advances the filaments to a furling unit-a. Obtained n: LCP with tungsten powder filler of approximately 400 denier- (40 filaments). The filler is usually distributed evenly across the fiber. The porfusion spinning process repeats with variation (0.1-2.0% by weight of tungsten, extrusion temperature, 310 ~ 325 ° C, pump speed, 12-38 rpm, absorption speed, 152.40-609.60 rn / rnin; spinner hole diameter, .0127- U.03302crn) to ortener LCP yarn with tungsten powder filler of a denier variety (40 filaments) as shown in table i. The fiber with metal filler is evaluated for tension properties in an instron tensile tester. The results of the property measurements are presented in table 1. The evaluation is conducted using the following test protocols: for tenacity, a length of 25.4 caliber of the fiber with 2.5 twists per cm with a chain speed of 10%; and for the module, COPY UNDERLINE.

TABLE 1% by weight Denier Tenacity (gpd) Module (gpd) 1. 0 444 7.9 523 II 333 7.4 52.1 642 7.8 507 778 8.7 453 0. 1 678 8.9 492 0. 1 1020 - - 0.5 639 8.4 5.16 2. 0 439 7.4 474 II 724 7.7 482 II 770 8.1 455 II 847 7.4 444 II 1020 - __ Note: "gpd" siignifica grams / denier TABLE II Cycles or Failure 0.1% in weight 259 0.5% in weight 249 1.0% in weight 251 2.0% in weight 141 Wire of 2 stainless steel Ade? Na < * As indicated in Table 2, the fiber with filler * of tungsten powder made of polymer VI-'CTRA is evaluated for bending duration (ASTM D-217B). Weight of 0.4535923 l - g pa * tension is used. Stainless steel wire 0.00 / 62 in diameter is also tested. The samples are of comparable weight. Each result established in table 2 represents the average value of 10 tests. The superior resistance to f lex? > n / fold? n? ont or is found for fiber with tungsten filler compared to stainless steel wire. Also, the VECTRA polymer thread with filler with tungsten powder (0.5, 1.0, 2.0% by weight? with dpf respectively of 16.0, 19.5 and 11.0) is tested for the loss of wash toughness. It is important that the protective clothing can be washed repeatedly without losing effort. The following washing procedure is used: washing for 10 minutes at 60 ° C in 0.1% concentrated detergent (sold under the registered trademark ARM SHEMMERR) in distilled water. Rinse for 10 minutes at 40 ° C with distilled water. Detergent / fresh water is used for washing, and fresh distilled water is used for rinsing. The samples are washed for 1, 3, 5, 10 and 15 cycles, and air-dried after the final cycle. Do not observe tenacities test after 15 wash cycles. Also the VECTRA polymer thread with filler with tungsten powder (0.5, 1.0 2.0% on w, with "loniei respectively of 624, 406 and 773) is tested for loss of tenacity of exposure to bleaching (2.62% of chlorox). , 5.24% chlorox) ,. Enough thread is wrapped around a stainless steel tube. It is immersed in the appropriate solution for the designated time (2, 12 and 24 hours). Then, the lulo is rinsed with tap water and air dried. The dry yarn is wound on a small spool and tested using a gauge length of 25.4 ein with 2.5 torsions per ein with a "le ca" Jena speed of 10%. Stress retention in excoso of 85% is observed.

EXAMPLE 3. EVALUATION OF RESISTANCE TO LINE THREAD CUTS Gloves made of mixed body yarn are prepared as shown in table 3. Polyethylene fiber < The high voltage effort is available comei * c? to linent e of Allied Corporation of New Jersey under the registered trademark SPEC RAR. High tensile stress ararnide fiber is available commercially from DuPont of Uilmington, Delaware under the trademark KEVLARR. A glove is cut biased on the side and a layer of cloth is removed for testing. The fabric is stretched in a circular sample holder * 10.16 crn in diameter and subjected to pre-tension by applying a force of 0.907 l-g to the center of the circle. The test is performed on an Instron voltage tester. The circular sample holder is clamped "in the tension tester at a b ° angle with respect to the floor. The sample holder is raised in a direction perpendicular to the floor at a speed of 12.7 ein per minute, so that the fabric is attached to a non-rotating carbide (non-rotating) sheet at an angle, thus simulating an action of sliced. The fabric is assembled so that the cloth fabric is perpendicular * to the direction of the simulated slicing action. The force required to cut through the fabric (in l-g) is measured by the tension tester. The r * esults are shown in Table 3. Comparative examples are marked C-1 through C-6. The benefit of a "Je LCP with filler" fiber, compared to a non-filler fiber, is clearly shown in Table 3. The improvement in cut resistance is particularly evident when comparing VECTRAN fibers "M with 439 filler and 444 denier- (examples 3-3 and 3-4) with VECTRAN M fiber without 400 denier filler (example C-4) Similar conclusions can be reached by comparing examples 3-1 and 3-2 with the Cl example In this way, it is readily apparent that resistance to LCP fiber cuts improves when as little as about 1% to about 2% by weight of hard filler is present in the fiber.This is equivalent to about 0.07. % to about 0.14% by volume for tungsten filler The superiority of an LCP fiber with full "Jor" to a filled polyethylene fiber with high stress strain without filler is also shown VECTRAN M fiber is 2 / also more resistant to caior than polyethylene fiber. Ararnidic fiber can not withstand exposure to bleach, so Fiber VECTRAN M with filler is advantageous compared to ararnide when the filler is exposed to bleach during use or washing.

TABLE 3 Soul wrap 2 wrap Glue (kg) 3-1 650 denier 847 demer 847 denier HS PE V / 2% by weight V / 2% by weight 2.36 3-2 650 denier 778 denier 778 denier H5 PE V / l% by weight V / 1% by weight 2.63 Cl 650 denier 750 denier 750 denier HS PE VECTRAN M VECTRAN M 2.18 C-2 650 demer 1000 denier 1000 demer HS PE HS aramidic HS ararnidica 2.0 C-3 650 demer 650 denier 650 denier HS PE HS PE HS PE 1.32 3-3 650 denier 439 denier 439 denier HS PE V / 2% by weight V / 2% by weight 2.25 3-4 650 denier 444 denier 444 denier HS PE V / 1% by weight V / 1% by weight 1.86 C-4 650 deruer 400 denier 400 denier HS PE VFCrRAN M VECTRAN M 1 18 C-5 hhO denier- 400 denier 400 denier HS PE HS HS aramide HS aramidic 1.14 C-6 650 denier 375 denier 375 domer * HS PE l-IS PE HS PE 1.32"HS" means high stress effort; "PE" means pol leti lono; "V" means VECTRAN M EXAMPLE 4 Fiber "Je tereftalato de poiiet plena" fibers incorporating a tungsten powder filler are described. Tungsten has a Mohs hardness value of about 6.5 to 7.5. Tire grade polyethylene terephthalate (PET), having an intrinsic viscosity of about 0.95 when measured in o-chlorofol, is obtained from Hoechst Celanese Corporation, Sornerville, New Jersey in the form of pellets. A master load is made by mixing the polymer with 10% «Je tungsten powder on a base in that in a twinworm extruder. Tungsten has an average particle size of about 1 miera. The polymer and tungsten pellets are dried before mixing. The masterbatch is mixed with additional PET in a twinworm extruder to produce mixtures having 1% and 4% "tungsten on a weight basis. The samples are spinning by forcing the molten mixture first through a filter pack and then through a spinner. The yarn is subsequently extracted from a feed roller heated to 90 ° C., then it is extracted on a heated shoe, and finally it is subjected to a 2% relaxation at 225 ° C. The thread is twisted to test the properties. The data are summarized in Table 4. One of the fibers loaded with 10% tungsten is also analyzed for tungsten to ensure that the "filler" is not filtered. The analysis of the fiber shows approximately 8.9% by weight of tungsten in the fiber. Properties «tension. Tenacity, elongation and modulus are measured using the ASTM test method D-3822. Resistance to cuts. The fiber comes first in cloth for the cut resistance test. The yarn density of yarn in the fabric is measured in grams / me ro2 (GMC in tables 4 and 5). The cut resistance of the fabric is then measured using the Ashland Cutting Performance Protection ("CPP") test. The test was carried out at TRI / Environnental, Inc., 9063 Bee Cave Road, Austm, Texas 78733-6201. In the test, the fabric sample is placed on the flat surface of a mandrel. A series of tests is carried out where a razor loaded with a variable weight is pulled along the fabric until the cloth is completely cut. The distance the knife travels through the fabric is measured until the knife cuts through the fabric completely. The point at which the knife cuts through the cloth is the point at which an electrical contract is made between the mandrel and the knife. The distance required to make the cut is outlined in a graphic as a function of the car-ga in the razor. The data is measured and delineated to cut distances ranging from about 0.762 crn to about 4.5 / 2 cm. The resulting graph is approximately a straight line. An idealized straight line is drawn or calculated through the points on the graph, and the weight required to cut through the fabric after one centimeter of travel along the fabric becomes the graph or is calculated by analysis of regression. The values are interpolated from the weight required to make a cut after a centimeter of the stroke of the knife along the fabric are shown in tables 4 and 5 as "CPP", an abbreviation for Court Protection Performance. Finally, for purposes of comparing the data for different fabric sample thicknesses, the value of "CPP" is divided by the thickness of the + (GMC) to compensate for variations in the thickness of the fabric. This value is shown as CPP / GMC in Tables 4 and 5. The cut resistance data for PET fiber with tungsten filler * are presented in Table 4.

EXAMPLE 5 In these experiments, the PET fiber samples are filled with alumina powder, which is commercially sold under the trademark MTCR0P0L1SHR 11 co or a polishing abrasive -... Two different alumina powders having average particle sizes are used. < - about 0.05 micras and about 1.0 micras. Both are obtained as Buehler desaglornerized powders, I td., Uaul-egan Road, Lake Butf, Illinoi 60044. The 0.05 micron alumina is gamma alumina with a cubic crystal structure and a dur-eza value * Mohs e 8. The material of 1.0 miera is alpha alumina, which has a hexagonal crystal structure and a Mohs dur-eza value of 9. The two alumina polyes are mixed with PET using the same method as in the example 4 to produce "Je PFT with filler" samples containing alumina at levels of around * 0.21%, 0.86%, 1.9% and 2.1% by weight. Measurements of fiber properties and cut resistance are made using the same methods as in example 4. The data are presented in table 5. The data in tables 4 and 5 show "there is an improvement in the cut resistance of at least about 10% to about 20% at all levels of filler used. Both data series incorporate filler in the fiber at levels of around 0.07% to about 0.7% on a volume basis. The properties of the fiber do not seem to degrade signi icantly with these quantities and sizes of particles.

EXAMPLE 6 A series of experiments was conducted using tungsten particles of various particle sizes (0.6 - 1.6 microns) as fillers in PFT at concentrations of 0.4 - 1.2% by volume. PET with tungsten filler is threaded into yarn, which was subsequently woven into cloth for testing. Once the cut resistance was tested by the Ashland Court Protection Functioning Test, using the modified procedure described below. The CPP values were divided by the area densities of the fabric to correct * the fact that the tests were carried out at different fabric densities. The data is presented in table 6.

OPERATION OF PROTECTION OF CUTS (CPP) The Ashland CPP Test was carried out as described at the end of Example 4, but a calibration was used with a standard with a known CPP value to correct the results for batch-to-batch variations on the cutting edge. the knife. This procedure was used for the data in Tables 6 and 7, and Examples 7 to 15. The calibration standard was neoprene of .15748 cm, style NS-5550, obtained from FAIRPRENE, 85 Mili Plain Road, Fairfield, CT 06430, which has a value «the CPP of 400 grams. The CPP value was determined for this pattern at the beginning and end of a series of tests, and an average normalization factor * was calculated that would give the measured CPP value of the standard to 400 grams. The normalization factor was then used to correct the data measured by the test series. Also, when calculating the value of CPP, a graph of the logarithm of the required distance between the fabric and the load on the knife was used, and < Thu was more 1 neal.

EXAMPLE 7 A series of experiments was conducted using calcined aluminum oxide as the filler * for the fiber. The experiments were carried out using the same procedure as used in the previous examples, but with a larger scale of particle sizes (0.5 - 3 microns) and a larger scale of concentrations (0.8 - 3.2% by volume) < in Example 5. The calcined aluminum oxide used in the experiments was obtained from Agsco Corporation, 621 Route 46, HasbroucM, N.3. 07604, and it is in the form of platelets, referred to as Alumina # 1. The CPP values were measured using the procedure described at the end of Example 6. The CPP / GMC values were then calculated as described above. These data are presented in table 7.

It can be observed to par + ir the data in the tables that the CPP / GMC values are unaffected by all the variables listed (ie, particle size, particle concentration, area density, and pfd). of fiber). At the densities of ar * ea al + as (GMC), the CPP / GMC values fall significantly. In this way, preferential comparisons are made for tests on + elas (with similar area densities), however, you can observe from the data in table 4 that at a vol of 2.4% in volume ( 6.0% by weight), with a parcel size + 2 microns, CPP / GMC values for fabrics made of textile fibers (2.8 dpf) and having area densities of less than approximately 339 grams / rne + ro "were greater than about 100. (Samples Nos. 22-24 and 30) This is much more than a 50% reduction on the average CPP / GMC value. Filler of comparable fiber size and area density (the three Controls in Table 1) The average CPP / GMC values for all the PET samples with tungsten filler in Table 6 (70) and all PET samples with aluminum oxide filler in Table 7 (75) are also significantly higher than the average of the controls. 3 b EXAMPLE 8 A 0.05 micron alumina sample from Buehler was compounded in a Haake conical twinworm extruder with polyethylene terephthalate (PFT) to make a compound of 2% by weight of alumina in PET. This is then spun by wire fusion. The thread was removed before determining the properties of the tension and the resistance to cuts. A sample of PET control without filler was also made in a wire and was extracted. The thread without filler- had a denier- of 0.6 dpf (denier filament), and the thread with filler had a denier of 6.3 dpf. The tensile properties, measured using the test method D-3822 of ASTM, for the fiber without filler were tenacity of 5.3 gpd, 10% elongation, 104 gpd of modulus, and for the fiber with filler were 7.8 gpd of tenacity, 10% elongation, 129 gpd of module. These yarn samples were then directly woven into gloves on a 7-gauge Shuna Sheki knitting machine. Finally, the cut resistance was measured using the Ashland Court Protection Performance test described in Example 6. The CPP and the density of area (GMC) for the glove without filler were 1291 g and 881.4 grams / meter2 and for the glove with filler they were 1083 g and 678 grams / meter2. The standardized cut resistance values (CPP / GMC) are 49 for the control sample and 54 for the filler sample *, which is an increase of approximately 10%. This shows that a large number of very small parcels does not increase the value of CPP / GMC (and thus the CPP value for the same fabric weight) by as of 10%. The distribution of particle size by scanning electron microscope to determine the actual particle size distribution was also measured. The average particle size was listed as 0.05 miera by the manufacturer. The distribution of measured particle size is measured on the scale of 0.05 microns to 1.32 microns and peaks to 0.11 microns. The average particle size was 0.31 microns, and the medium was 0.23 microns. Note that the data in this example do not completely agree with the data in Table 5 (examples 5-3, 5-4, 5-7 and 5-8), which was obtained using the CPP test without The calibration procedure described in Example 6. The modified test method was developed later than the data in Tables 4 and 5 and appears to be reliable (ie, there is less dispersion) than the previous data in Table 4. and 5.

EXAMPLE 9 A difficulty in the manufacture and use of fibers and yarns resistant to cuts described herein is abrasion of the fibers with filler, which causes rapid wear of the equipment used by Jo to process the fiber. It has been discovered that a heterofile sheath / alrna can be made co? Nf >In the fiber with filler in the core, with a fiber sheath without a filler, fibers and yarns from the sheath are made using conventional bi-component fiber spinning equipment. The air and func- tion need not be made from the same polymer, but they use the same polymer to eliminate potential problems of abrasion between the layers as well as to simplify the procedure. The composition of fiber with filler is the same as it was previously dreamed. Even with a polymer sheath without filler, the values for resistance to cuts by the CPP test are raised by at least * 10% (and value-is higher, as previously taught). The cut resistance is higher when using less sheath, with 10% by volume of sheath polymer giving good CPP values and a soft fiber. It is contemplated that the sheath should be as low as approximately 5% by volume up to 50% by volume, with the overall increase in cut resistance being proportional to the amount of fiber with filler in the sheath fiber. / alna. As an example, PET is composed of 6% by weight of alumina (Calcined alumina Grade # 1 of Agsco Corp., having an average particle size of 2 microns). This is fused by melting in a sheath / core biconponent fiber, with PET without filler being the sheath polymer. The sheath comprised 10% of the volume of the fiber, which was smooth and smooth. The thread twisted in six, was extracted and woven. The denier after extraction was 460/114, or approximately 4 dpf. The twisted, woven yarn was woven into gloves having two different fabric weights. The CPP value-es and the CPP / GMC values were measured for each one. The r * esults «are the following: (1) 291.54 GMC, 1063 g CPP value; 3.65 is the value of CPP / GMC; (2) 508.5 GMC, 1568 g CPP value; 3.08 is the CPP / GMC value. These can be compared with the expected values for PET with filler without a sleeve. The transverse section of the fiber was examined under a microscope. It can be seen that the particles are in the core of the fiber and do not come out on the surface, giving the surface a smooth appearance, as well as a smoother feeling.

EXAMPLE 10 Calcined alumina (Grade No. 1 of Agsco) was mixed, having an average particle size of about 2 microns, at a level of 6% by weight of the polymer in a spin material containing ararnide fiber at a level of 6% by weight. weight, available under the trademark TREVARR, dissolved in N-rnetilpirroli dinone (NMP). The aradnide fiber is a copolymer of terephthalic acid with the following three diarrins in a ratio of 2: 1: 1: 3, 3 '-dirne + ilbencidin, p-femlenodi amine and l, 4 ~ b? S- (4-arn? nofenox?) -benzene. The aradnide fiber was wet-wound and then extracted at 380 ° with an extraction ratio of 11: 1 to produce a yarn having a denier of 4 dpf, tenacity of 22 gpd, and a modulus of 675 gpd. A control sample of arsenic fiber without filler is also wet wound on a yarn having a denier of 5.3 dpf, tenacity of 26 gpd, and modulus of 711 gpd. Comparative PET samples containing 6% by weight of alumina (same alumina as before) were also carried out. The threads were woven in gloves, and the resistance to cuts of the glove fabric was tested. The values of resistance to cuts are shown in table 0. The r-esis gingiva to cuts of the aramidic fiber with filler * is clearly the highest level.

EXAMPLE 11 Calcined alumina (Grade NQ i, Agsco, average particle size of 2 microns) was mixed at a level of 6% by weight with polyethylene naphthalate (PEN) in a twin worm comed extruder. The PEN with filler was spun by fusion and stretched to produce a yarn having a tenacity of 5.7 gpd and a modulus of 165 gpd. The threads were textured and woven to form gloves. The cut resistance values of two fabric samples from the gloves having different GMC values are as follows: (1) 430.5 GMC; CPP, 1250 g; CPP / GMC, 99; (2) 542.4 GMC; CPP, 1695 g, CPP / GMC, 106. Samples with PEN filler had higher CPP / GMC values «either either PET with filler or PEN without Filler, PEN without filler in the form of a wrapped wire in a gauge glove 7 has the following cut resistance: 718.6 GMC; CPP 867 g; CPP / GMC, 41 EXAMPLE 12 Alcinana calcinada (Grade MQ i of Agsco, average particle size of 2 microns) is rnezcla < At a level of / wt% with high molecular weight polyethylene * having an average molecular weight of about 150,000. This polyethylene is sold commercially in the form of fiber as an extended chain polyether under the trademark CERTRAN®. The filler polymer is melt spun to produce a high modulus filler fiber after stretching at a ratio of 20: 1. The yarn has a CPP value that is improved by approximately 45%. The spinning process will be taught in the patents of E.U.A. Nos. 4,287,149; 4,415,522; and 4,254,072, incorporated herein by reference. Similarly, the extended chain polyethylene fiber containing particles with filler is also made by spinning with ultra high molecular weight polyethylene gel with particulate filler by means of the method taught in the U.S. Patents. Nos. 4,356,138, 4,413,110, and 4,663,101 which are incorporated herein by reference.

EXAMPLE 13 HLIO «Je PET that had been filled with 6% by weight of calcined alumina (size of articulated« Je 2 micras) was wrapped around a stainless steel wire from 76.2 microns to approximately 8 turns per 25.4 inm to make a mixed thread (also LLarnado corno? n thread wrapped). A little "PET without filler was also included. By way of comparison, a PET sample was wrapped around the same type of wire to determine the effect of the filler on the wrapped yarn. The threads (rnix + os (wraps + .os) had the following compositions and values of resistance to cuts: (1) stainless steel wire of 75.2 microns (19% by weight), wire "Je PET with filler (70%). ), PET thread without filler (11%). This thread was woven to form a glove. A glove cloth sample had a weight of 542.4 GMC, a CPP value of 3648 g, and a CPP / GMC of 230. (2) 76.2 micron stainless steel wire (18% by weight), PET wire without filler * (82%). This thread was also woven to form a glove. A glove cloth sample had a weight of 610.2 GMC, a CPP value of 3310 g, and a CPP / GMC value of 188.

EXAMPLE 14 A PET thread with 6% alumina filler (particle size of 2 microns) was wrapped around a fiberglass core (G75, PPG) at approximately 8 turns per 25.4 nm. The fiberglass is a 600 denier yarn «juo has a filament diameter of 9 microns. The wrapped yarn (also called mixed yarn or combination yarn) consisted of 21% glass fiber and 79% PET with filler. A control sample similar to this was made, but using PET without filler * for comparison purposes. Both threads were woven to form gloves for test purposes. A fabric sample "Jel glove containing PET with filler had a weight of 711.9 GMC, a CPP index of 2423 g, and a CPP / GMC value of 3.966.3. A sample of the control fabric had a weight of 779.9 GMC, a CPP value of 2238 g, and a CPP / GMC value of 96.

EXAMPLE 15 Non-woven fabrics, also known as veils and non-woven mats, can also be made resistant to cutting according to the present invention. This example demonstrates spun-bonded non-woven fabrics. A spin-bonded nonwoven fabric was made from PET containing 6% alumina (% by weight) with a particle size of 2 microns. The polymer was spun at 2.98 kg / hr. and approximately 300 ° C through a spinner with 90 holes that were 0.5 mm in diameter. The fiber was thinned by a high speed nozzle (ie an air jet) at a stretch ratio of 250: L. The fiber was received as a strip on a perforated metal plate of 1.22 x 1.22 m, I to mat was ? aza «Ja ron needle to promote cohesion between fibers. In comparison, an anger was also made using PFT without a filler. The strip made from the PET without filler * had a weight of 318.6 GMC, a value * CPP of 684 g and a CPP / GMC value of 73"L of PET with filler had a weight of 115.2 GMC, a CPP value of 951 g, and a CPP / GMC value of 102. Heterophilic spun-bonded mats were also made, in which a melt polymer and PET with filler described above are passed to + r-birds of a two-component spinner so that the low melting polymer is the sheath of a sheath-core fiber. The Indian filaments are thinned as they leave the spinners and are passed over a perforated plate, band or the like. The cohesion between the fibers is increased by compressing the fiber mat at an emperature high enough to melt the sheath polymer, but not so high as to melt the soul. Examples of low melt sheath polymers include polybutylene ter-phthalate, filled polyethylene and polypropylene. Non-woven fabrics can be made using cut-resistant fibers by any of the methods commonly used to make non-woven fabrics. For example, they can be spun-bonded as described above, and the strips can be made cohesive by numerous methods, such as needle punching, the use of adhesive and fusing by points by localized fusion at specific points. Applications for such non-woven materials include cutting and sewing gloves, cutting and melting gloves, other clothing in which the fabric is cut and then sewn or fused to form the article of clothing, upholstery, etching, covers and waxing , all with an i * esi tenia a to cuts me oreda. It should be understood that the embodiments of the invention described above are illusive only and "jue l? Long-term modification of these may occur for a person skilled in the art. Accordingly, this invention should not be considered as limited to the embodiments described herein. h TABLE 4 Resistance to cuts of PET with filler with tungsten i Tenacity (gpd), Rlarganento (Z), nodule (gpd), aedidos using the method of test D-3822 of ASTIL 2 yield of cut protection, aedido using the CPP test of Rshland. J S raeos by Retro square. 4 b TABLE 5 Resistance to cuts of PET with filler with alumina Tenacity (gpd), Lengthening (Z), n dulo (gpd), measured using Test Method D-3822 of fiSTU. Regenerating cutting protection, Weakened using the CPP test from Ashland. Graces by Retro square. 7 TABLE B Resistance to cuts of PET with filler with tungsten CONC is the concentration of hard particles, led as an I in volume in PET. DPF is the denier of fiber in dpf. Tenacity, niargauento and nodule are the tensile properties of the fiber, measured by the test method ? -3B22 of flSTil. Jan is the density of the area of the woven fabrics, tedida in grains by square letro. CPP is the CPP value driven by the CPP test of Ashland. CPP / 6HC is the ratio of the CPP value to the density of the area (6110. t) by the method described in Example 4.

TABLE 7 with * inudc a < Je cua rO 7 CONC is the concentration of hard particles, led CORO a Z in volume in PET. DPF is the denier of fiber in dpf. Tenacity, filarganento and nodule are the tensile properties of the fiber, measured by the test method D-3822 from flSTH. 6HC is the density of the area of the woven fabrics, led in grays by Retro square. CPP is the CPP value determined by the CPP test of Ashland. CPP / 6HC is the ratio of the CPP value to the density of the area (GHC). We ask for the method described in Example 4. 1-GHC is high and CPP / GHC is low because the glove is coated with plastic to improve the grip yield.

TABLE 8 GMC CPP CPP / GMC ÍREVAR Aramid (not filled) 3.7 379 102 TREVAR Ararmd rnas Alumina 4.6 951 205 PET plus Alumina 4.3 516 120

Claims (13)

h NOVELTY OF THE INVENTION CLAIMS

1. - A cut resistant fiber comprising a fiber-forming polymer and a hard filler uniformly distributed in said fiber, said fiber having a denier in the range from about 1 to about c> g. 0 dpf; wherein said fiber-forming polymer is selected from the group consisting of (a) an aromatic polyamide comprising monorhene units derived from terephthalic acid and one or more aromatic dianins, and (b) full polyeth that has a suitable molecular weight for making extended chain polyethylene; wherein said filler has a hardness value of Mohs of more than 3, said filler is present in an amount of about 0.05% to about 20% by weight, said filler being selected from the group consisting of a powder which has an average diameter of up to 20 microns, an elongated particle having an average length of up to 20 microns, and mixtures of the same; wherein said filler is included in an amount sufficient to improve the cut resistance by at least 20% compared to a fiber comprising said polymer without said filler, as measured by the Functioning + Test or Cutting Protection of Ashland. 2.- A cutting edge resistant to cutting in accordance with K the re vindication), wherein said fiber-forming polymer is an aromatic ol-amide comprising monomer units derived from terephthalic acid and one or more aromatic diamines. 3. A cut resistant fiber according to claim 2, wherein said aromatic polyamide is soluble in a polar aprotic solvent. 4. A fiber i isiste + e to the cut according to claim 2, wherein said aromatic diarrins are μ-pheni-lenediamine na, 3, 3'-dune + il boncidma and 1, 4-bi s ~ ( 4 -aini nof enox i) - benzene. 5. A cutting resistant fiber according to claim 3, wherein said filler has an average particle size in the range of about 0.25 microns to about 10 microns, and is included in an amount of about 0.1% a approximately 5% by volume. 6. A cut resistant fiber according to claim 5, wherein said filler is calcined alumina. 7. A cut resistant fiber according to claim 5, wherein said filler is selected from the group consisting of iron, steel, nickel, tungsten and mixtures thereof. 8. A cutting-resistant fiber according to claim 1, wherein said fiber-forming polymer is polyethylene having a suitable molecular weight to make ex-endide chain polymer. 9. The cut resistant fiber according to claim 8, wherein said filler has an average particle size in the scale of approximately 0.25 microns to about 10 microns, and is included in an amount of approximately 0.1%. to approximately 5% in volume. 10. A cut resistant fiber according to claim 9, wherein said filler is calcined alumina. 11. A cut resistant fiber according to claim 9, wherein said filler is selected from the group consisting of iron, steel, nickel, tungsten and mixtures of the same. 1

2. A cutting-resistant fiber according to claim 8, wherein said fiber is made by a selected method of gel spinning or melt spinning. 1

3. A sheath / shear-resistant fiber comprising: (a) a core comprising a fiber-forming polymer and a hard filler uniformly distributed in said core, said filler having a hardness value of 3-fold floats. , said filler is present in an amount of about 0.05% to about 20% by weight of said core, said filler is selected from the group consisting of a powder having an average diameter of up to 20 microns, an elongated particle having an average length of up to 20 microns, and mixtures thereof; and (b) a sheath consisting essentially of a second polymer without a filler - said sheath comprises about 5% to about 25% by volume of said fiber; wherein said sheath fiber has a denier on the scale of about 1 to about 50 dpf; wherein said filler is included in an amount sufficient to improve the shear strength of said sheath / core fiber by at least 20% compared to a sheath fiber / core without said filler-, as measured by The Ashland Court Protection Performance Test. 14, .- A sheath / core fiber resistant according to claim 13, wherein said sheath comprises about 10% to about 20% by volume of said sheath fiber / alrna. 15. A cut-resistant sheath / core fiber according to claim 13, wherein said fiber-forming polymer in said core and said second polymer in said sheath are the same polymer. 16. A cut-resistant sheath / core fiber according to claim 13, wherein said fiber-forming polymer in said core and said second polymer in said sheath are different polymers. 17. A cut-resistant sheath / core fiber according to claim 16, wherein said second polymer has a melting point of at least 10 ° C less? The melting point of said fiber forming fiber polymer in said core. 18. A guan e comprising the cut resistant fiber, in which the cut-resistant fiber comprises a polyester. A fiber filler and a hard filler are stippled uniformly in said fiber, said fiber having a denier- on the scale of about 1 to about 50 dpf; wherein said filler- has a hardness value of Mohs of mm of 3, said filler- is present in an amount of about 0.05% to about 20% by weight, said filler is selected from the group consisting of a powder having an average diameter of up to 20 microns, an elongated particle having an average length of up to 20 microns, and mixtures thereof; wherein said filler is included in an amount sufficient to improve the cut resistance by at least 20% compared to a fiber comprising said polymer without said filler, as determined by the Ashland Court Protection Functioning Test. 19. A nonwoven fabric comprising a fiber made from a melt-processable polymer and a hard filler uniformly distributed in said fiber, said fiber having a denier in the range from about 1 to about 50 dpf; said filler - has a hardness value of Mohs of more than 3, said filler is present in an amount of about 0.01% to about 20% by weight. Filler has an average particle size in the -scale of about 0.25 microns. at about 10 microns where said filler is included in an amount sufficient to improve the cut resistance of said fabric or woven by at least 20% compared to a fabric comprising the same fiber without said filler, as determined by the Ashland Court Protection Act. 20.- The nonwoven fabric of < The invention also relates to claim 19, wherein said hard filler is included in an amount from about 0.1% to about 5% vol. 21. The non-woven fabric according to claim 19, wherein said hard filler has an average particle size in the range from about 1 to about 6 microns and said hard filler is included in an amount on the Approximately 0.5% to approximately 3% in volume scale. 22. The non-woven fabric according to claim 20, wherein said melt-processable polymer is polyethylene terephthalate. 23. The non-woven fabric according to claim 22, wherein said hard filler is aluminum oxide. 2

4. The non-woven fabric according to claim 22, wherein said hard filler is selected from the group consisting of iron, steel, nickel, tungsten and mixtures of the same. 2

5. A non-woven fabric according to claim 19, wherein said fiber is a sheath fiber / a, wherein the core comprises a first melt processable polymer and a hard filler, and said sheath comprises a second polymer that melts at a temperature lower than that of the polymer in said core.