Classifications

• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
  • D02G3/442—Cut or abrasion resistant yarns or threads
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
  • D02G3/04—Blended or other yarns or threads containing components made from different materials
  • D02G3/047—Blended or other yarns or threads containing components made from different materials including aramid fibres
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2904—Staple length fiber
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/30—Woven fabric [i.e., woven strand or strip material]

Definitions

• Staple fiber yarn comprising the staple fiber yarn and article comprising the textile fabric
• the present invention relates to a staple fiber yarn, a textile fabric comprising the staple fiber yarn and articles comprising the textile fabric.
• WO 97/25464 describes a staple fiber yarn containing para-aramid staple fibers, each having a denier ranging from 3 to 6 dtex.
• WO 97/25464 teaches that the cut resistance of an article made from such a yarn, eg a glove, can be increased by increasing the denier of the staple fibers forming the yarn, where cut resistance means the force necessary to hold the article cut at a cutting length of 25 millimeters.
• WO 97/25464 teaches that a staple fiber yarn having a denier of staple fibers above about 6 dtex results in fabrics which, while having very good cut resistance, are neither aesthetically acceptable nor provide adequate wearer comfort.
• WO 97/25464 teaches that a staple fiber yarn having a denier of staple fibers below about 3 dtex leads to textile fabrics whose wearing comfort is good, but whose cut resistance decreases more and more as the staple fiber titer decreases below 3 dtex.
• WO 97/25464 teaches that the increase in cut resistance can only be achieved with a loss of aesthetic acceptance and wearing comfort, while an increase in wearing comfort and an improvement in aesthetic acceptance can only be achieved with a loss of cut resistance. Therefore, the present invention has the object to provide a Stapelmaschinegarn available, which allows the production of a fabric with high cut resistance and at the same time with high comfort.
• a staple fiber yarn comprising a staple fiber mixture containing staple A and staple B and optionally other staple fibers, both staple A and staple B consisting of polymers selected from aramid, polyolefin, polybenzoxazole and Polybenzothiazoles wherein the staple fibers A have a titer T (A) and the staple fibers B have a titer T (B) and wherein the titer ratio T (B): T (A) in the range of 1, 5: 1 to 8.8: 1 lies.
• a textile fabric containing the staple fiber yarn according to the invention and an article comprising this textile fabric, e.g. a glove exhibits a cut resistance that is at least equal to or even higher than the cut resistance of a similarly produced fabric from a staple fiber yarn containing only staple fibers having the higher titer T (B).
• the staple fiber yarn of the invention comprises highly cut resistant embodiments , which, measured according to DIN EN 388, eg in Classes 3 are classified, and in which both the staple fiber T (A) and the staple fiber T (B) are well below 3 dtex, so that produced from such yarns fabric not only have a high cut resistance, but also by a high wearing comfort and a pleasing appearance distinguish.
• the staple fiber yarn according to the invention contains staple fibers A and B, wherein both the staple fibers A and the staple fibers B consist of polymers selected from aramid groups, polyolefins, polybenzoxazoles and polybenzothiazoles.
• aromatics mean aromatic polyamides in which at least 85% of the amide (-CO-NH-) bonds are bonded directly to two aromatic rings
• An aromatic polyamide which is particularly preferred for the present invention is poly-para-phenylene-terephthalamide, a homopolymer resulting from the molybdenum polymerization of para-phenylenediamine and terephthalic acid dichloride
• aromatic polyamides are copolymers which, in addition to para-phenylenediamine and terephthalic acid dichloride, contain small amounts of other diamines and / or other dicarboxylic acid chlorides in the polymer chain
• the other diamines and / or other dicarboxylic acid chlorides may be incorporated in the polymer chain in an amount of up to 10 mol%.
• polyolefins mean polyethylene or polypropylene.
• polypropylene is to be understood as meaning a substantially linear polypropylene which has a molecular weight of preferably more than one million.
• polybenzoxazoles and polybenzothiazoles “are to be understood as meaning polymers of the structural units represented below, in which the aromatic groups bonded to the nitrogen are preferably carbocyclic, as shown in the structural units. However, said groups may also be heterocyclic. Further, the nitrogen-bonded aromatic groups are preferably six-membered rings as shown in the structural units. However, said groups may also be formed as fused or unfused polycyclic systems.
• both the staple fibers A and the staple fibers B consist of polymers which are selected from the group of aramids, polyolefins, polybenzoxazoles and polybenzothiazoles comprises in the context of the present invention all possible combinations of said polymers for the staple fibers A by said selection and B.
• the staple fibers A and the staple fibers B are each selected from only one of the groups.
• staple fibers A either from the group of aramids or from the group of polyolefins or from the group of polybenzoxazoles or from the group of polybenzothiazoles and staple fibers B either from the group of aramids or from the group of polyolefins or are selected from the group of polybenzoxazoles or from the group of polybenzothiazoles.
• the staple fibers A and the staple fibers B are selected from the group of the aramids, preferably the para-aramids, wherein poly-para-phenylene terephthalamide is particularly preferred within the latter embodiment.
• the staple fiber yarn according to the invention contains in a preferred embodiment, the staple fibers A and B at least approximately in a homogeneous mixture.
• predetermined weight ratio A: B of the staple fibers A and B is at least approximately equal, so that in this preferred embodiment, the staple fiber yarn according to the invention at least approximately free of any core / Sheath structure is.
• the staple fiber yarn according to the invention particularly preferably contains the staple fiber A and B in a homogeneous mixture, so that in this particularly preferred embodiment, the staple fiber yarn according to the invention is free of any core / shell structure.
• the titer ratio T (B): T (A) is in the range from 1.5: 1 to 8.8: 1. At a titer ratio below 1.5: 1, the advantageous effects of the yarn do not come into play. At a titer ratio above 8.8: 1, the wearing comfort of an article made from such a yarn, e.g. a glove, to be desired.
• T (B): T (A) in the range from 1.6: 1 to 4.4: 1 and in particular in the range from 1.7: 1 to 3.2: 1, the advantageous effects described at the beginning are particularly clearly formed.
• the weight ratio of staple fibers A: staple fibers B can be set within wide limits, e.g. in the range of 90:10 to 10:90.
• a weight ratio of staple fibers A: staple fibers B are from 80:20 to 20:80, especially at a weight ratio of staple fibers A: staple fibers B of 75:25 to 25:75 and to an even greater extent at a weight ratio of staple fibers A: staple fibers B of 70: 30 to 30: 70, the advantageous effects described in the introduction are made particularly clear.
• the denier of the staple fiber A is in the range of 0.5 to 5.0 dtex, and is for example 0.52 dtex, more preferably in the range of 0.6 to 4.0 dtex, but in each Case under the condition that T (B): T (A) is in the range of 1.5: 1 to 8.8: 1.
• the titer of the staple fiber B is in the range of 0.5 to 5.0 dtex, more preferably in the range of 0.6 to 4.0 dtex and is for example 4.5 dtex, but in each Case under the condition that T (B): T (A) is in the range of 1.5: 1 to 8.8: 1.
• the total amount of the staple fiber yarn according to the invention is preferably in the range from 12 to 500 tex, more preferably in the range from 16 to 200 tex.
• the staple fiber yarn of the present invention can in principle be made by any method of making a staple fiber yarn, such as e.g. by a process comprising the steps of a) providing staple fibers A and staple fibers B and optionally further staple fibers, both the staple fibers A and the staple fibers B consisting of polymers selected from the groups of aramids, polyolefins, polybenzoxazoles and Polybenzothiazoles wherein the staple fibers A have a titer T (A) and the staple fibers B have a titer T (B) and wherein the titer ratio T (B): T (A) is in the range of 1.5: 1 to 8.8: 1 b) at least approximately homogeneous mixing of the staple fibers A and B and the optionally present further staple fibers in the titer ratio selected in step a) by producing a pre-strip and c) spinning the pre-strip resulting in
• the staple fibers A and B provided in step a) of the process according to the invention may have been produced by one of the known processes for producing staple fibers, for example by breaking or preferably by cutting the corresponding filaments to the desired length, for example in the region of 25 to 100 mm and more preferably in the range of 30 to 60 mm.
• the staple fibers A and B mentioned above may have been produced exclusively from unused filaments.
• the staple fibers mentioned above may also be made from filaments that have been in use, e.g. in a recycling process in which an already used textile fabric, such as a woven, knitted or knitted fabric made of aramid, polyolefin, polybenzoxazole or polybenzothiazole fibers was processed into staple fibers.
• an already used textile fabric such as a woven, knitted or knitted fabric made of aramid, polyolefin, polybenzoxazole or polybenzothiazole fibers was processed into staple fibers.
• the staple fibers obtained by recycling in step a) of the process described above should be made available only in admixture with the staple fibers prepared from unused filaments, so that the initially described advantageous properties of the resulting from the process described above staple fiber yarn or of the produced therefrom textile fabrics come to fruition.
• the at least approximately homogeneous mixing of the staple fibers A and B and the optionally present further staple fibers by producing a pre-band in step b) of the method according to the invention can be carried out in any manner which results in at least the staple fibers A and B in the Obtained thereby received at least approximately homogeneously.
• the predetermined weight ratio A: B of the staple fibers A and B is at least approximately the same.
• the spinning of the pre-strip resulting in step b) into a staple fiber yarn in step c) of the process according to the invention can be carried out by any of the known processes for producing a staple fiber gooseneck such as e.g. by rotor, friction or preferably ring spinning, e.g. by cotton or worsted spiders.
• the object underlying the present invention is further achieved by a textile fabric comprising a staple fiber yarn according to the invention.
• the textile fabric according to the invention is knitted, knitted, braided or woven.
• the textile fabric according to the invention has a basis weight in the range from 150 to 1500 g / m 2 , particularly preferably in the range from 200 to 900 g / m 2 .
• the textile fabric according to the invention is a knitted fabric, wherein the knitted fabric was produced preferably with a knitting density of 3 to 9 rows or rods and particularly preferably 3 to 8 rows or rods.
• the object underlying the present invention is achieved by an article which comprises the textile fabric according to the invention.
• the article according to the invention benefits in a corresponding manner from the advantageous properties of the textile fabric, ie from its combination of high cut resistance with high wearing comfort and attractive appearance. Therefore, concrete embodiments of the article according to the invention are objects in which the aforementioned advantageous properties are wholly or only partially desired.
• a preferred embodiment of the article according to the invention is a glove, apron, pants, jacket, cuff, tube, tube wrap or vandalism resistant article.
• Step c) Each of the pre-ribbons resulting in step b) is spun by ring spinning into a staple fiber yarn according to the invention having a total denier of 36 tex, whereby staple fiber yarns having a weight ratio A: B of 30:70 (Example 1a), 50:50 (Example 1b) and 70:30 (Example 1c).
• a staple fiber yarn having a total denier of 36 tex is prepared which consists of 100% by weight of the staple fibers B having a denier of 2.5 dtex (Comparative Example 1V).
• a glove is produced, wherein the procedure is as follows: Two of the respective staple fiber yarns are processed into a twisted yarn. Four such twines are fed and knitted in parallel in a knitting machine, the needle spacing is 7 gg (7 needles per 2.54 cm), the mesh density in row 3.5 and in 4 rods.
• Table 1 shows the total weight, the basis weight and the thickness of the obtained gloves. Furthermore, the table lists the lowest individual value determined according to DIN EN 388 from 10 measurements of the cut resistance in each case.
• Table 1 shows that the cut resistance of the gloves made from staple fiber yarns of the present invention by 12% (compare Example 1b with Example 1V) to 25% (compare Example 1c with Example 1V) are higher than the corresponding values of the glove made from the comparative staple fiber yarn, although the total weight of these gloves only by 2% (compare Example 1a with Example 1V) to 8% (compare Example 1c with Example 1V) and the basis weight of these gloves only by 3% (compare Example 1a with Example 1V) to 10% (see Example 1c with Example 1V) is increased.
• the thickness of the gloves made from the staple fiber yarns according to the invention is lower by 2% (compare Example 1c with Example 1V) to 6% (compare Example 1b with Example 1V), so that the gloves produced from the staple fiber yarns according to the invention have a higher tactility than that the comparison staple yarn made glove.
• the advantageous properties described above are achieved with titers of the staple fibers A and B significantly below 3 dtex, so that the gloves produced from the staple fiber yarns according to the invention have a pleasant wearing comfort and an attractive appearance.
• Step c) Each of the pre-ribbons resulting in step b) is spun by ring spinning into a staple fiber yarn according to the invention having a total denier of 36 tex, whereby staple fiber yarns having a weight ratio A: B of 30:70 (Example 2a) and 70:30 (Example 2b) to be obtained.
• a staple fiber yarn having a total denier of 36 tex is produced, which consists of 100% by weight of the staple fibers B having a denier of 2.5 dtex (Comparative Example 2Vi).
• a staple fiber yarn with a total denier of 36 tex is prepared as described above, which consists of 100% by weight of the staple fibers A with a titer of 0.93 dtex (Comparative Example 2V 2 ).
• a glove is produced in each case, being described as follows: Two of the respective staple yarns are processed into a twisted yarn , Four such twines are fed and knitted in parallel in a knitting machine, the needle spacing is 7 gg (7 needles per 2.54 cm), the mesh density in row 3.5 and in 4 rods.
• Table 2 shows the basis weight and the cut resistance, the cut resistance being given as the cutting force determined according to EN ISO 13997.
• the cutting force is the weight given in Newton which must be applied to a blade of standardized sharpness to cut straight through the material to be examined when cutting the blade by 20 mm.
• Table 2 shows that the cutting force of the gloves made from staple fiber yarns of the present invention is 15% higher (compare Example 2a with Example 2Vi) to 17% (compare Example 2b with Example 2Vi) than the corresponding values of the glove made from the comparative staple fiber yarn.
• the basis weight of the inventive glove of Example 2a is even 2% smaller and the basis weight of the inventive glove of Example 2b is only 1% greater than the basis weight of the comparative glove of Example 2Vi.
• the advantageous properties described above are achieved with titers of the staple fibers A and B significantly below 3 dtex, so that the gloves produced from the staple fiber yarns according to the invention have a pleasant wearing comfort and an attractive appearance.
• Example 3
• Step c) Each of the pre-ribbons resulting in step b) is spun by ring spinning into a staple fiber yarn according to the invention having a total denier of 36 tex, whereby staple fiber yarns having a weight ratio A: B of 50:50 (Example 3a) and 70:30 (Example 3b) to be obtained.
• a staple fiber yarn having a total denier of 36 tex is produced, which consists of 100% by weight of the staple fibers B with a titer of 1.7 dtex (comparative example 3V-1).
• a staple fiber yarn with a total denier of 36 tex is prepared as described above, which consists of 100% by weight of the staple fibers A with a titer of 0.93 dtex (Comparative Example 3V 2 ).
• a glove is produced, wherein the procedure is as follows: Two of the respective staple yarns are processed into a twisted yarn. Four such threads become parallel in one Knitting machine out and entangled, the needle spacing is 7 gg (7 needles per 2.54 cm), the mesh density in row 3.5 and in 4 rods.
• Table 3 shows the basis weight and the cut resistance, the cut resistance being given as the cutting force determined according to EN ISO 13997.
• Table 3 shows that the cutting force of the glove prepared from the staple fiber yarn of Example 3b of the present invention is practically equal to the cutting force of the glove of Example 3V-i made from the comparative staple fiber yarn of practically the same basis weight. This is surprising since said staple fiber yarn according to the invention contains 70% by weight of staple fibers of smaller denier, which should lead to a significantly reduced cutting force in view of the teachings given in WO 97/25464. Table 3 further shows that the cutting force of the glove prepared from the staple fiber yarn of Example 3a according to the present invention is even 11% greater than the cutting force of the comparative staple yarn prepared Example 3V 1 glove, although in this staple fiber yarn of the present invention 50% by weight staple fibers the smaller titer are present.
• Step c) Each of the pre-ribbons resulting in step b) is spun by ring spinning into a staple fiber yarn according to the invention having a total denier of 36 tex, whereby staple fiber yarns having a weight ratio A: B of 50:50 (Example 4a) and 70:30 (Example 4b) to be obtained.
• a staple fiber yarn having a total denier of 36 tex is produced, which consists of 100% by weight of the staple fibers B with a titer of 4.5 dtex (Comparative Example 4V-1).
• a staple fiber yarn with a total denier of 36 tex is prepared as described above, which consists of 100% by weight of the staple fibers A with a titer of 0.52 dtex (Comparative Example 4V 2 ).
• a glove is produced in each case, wherein the procedure is as follows: Two of the respective staple fiber yarns are processed into a twisted yarn. Four such twines are fed and knitted in parallel in a knitting machine, the needle spacing is 7 gg (7 needles per 2.54 cm), the mesh density in row 3.5 and in 4 rods.
• Table 4 shows the basis weight and the cut resistance, the cut resistance being given as the cutting force determined according to EN ISO 13997.
• Table 4 shows that the cutting force of the glove produced from the staple fiber yarn of Example 4b of the present invention is greater than the cutting force of the glove of Example 4V 1 made from the comparative staple fiber yarn which has a basis weight that is only 3% smaller than that Basis weight of the glove of Example 4b according to the invention. This is surprising since said staple fiber yarn according to the invention is 70% by weight Staple fibers of smaller titer contains, which should lead to a significantly reduced cutting force in view of the teachings given in WO 97/25464.
• Table 4 further shows that the cutting force of the glove prepared from the staple fiber yarn of Example 4a of the present invention is 12% greater than the cutting force of the comparative staple yarn prepared Example 4V 1 glove, although in this staple fiber yarn of the present invention 50% by weight staple fibers are included smaller titers are present.
• the basis weight of the glove from Example 4 according to the invention is only about 2% greater than the basis weight of the comparison glove from Example 4V. 1

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Gloves (AREA)
• Woven Fabrics (AREA)

Priority Applications (8)

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Publications (1)

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Family Applications (1)

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Cited By (3)

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Citations (6)

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• 2007
  • 2007-07-31 DE DE200750005365 patent/DE502007005365D1/de active Active
  • 2007-07-31 SI SI200730468T patent/SI2052102T1/sl unknown
  • 2007-07-31 CN CN2007800299562A patent/CN101501256B/zh active Active
  • 2007-07-31 DK DK07786441T patent/DK2052102T3/da active
  • 2007-07-31 WO PCT/EP2007/006743 patent/WO2008017400A1/de active Application Filing
  • 2007-07-31 AT AT07786441T patent/ATE484619T1/de active
  • 2007-07-31 EP EP20070786441 patent/EP2052102B1/de active Active
  • 2007-07-31 PT PT07786441T patent/PT2052102E/pt unknown
  • 2007-07-31 US US12/309,230 patent/US20090275253A1/en not_active Abandoned
  • 2007-07-31 PL PL07786441T patent/PL2052102T3/pl unknown
  • 2007-07-31 ES ES07786441T patent/ES2353342T3/es active Active
  • 2007-08-07 TW TW96128999A patent/TW200837232A/zh unknown

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