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

• 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 cut the article at a cut length of 25 millimeters to cut.
• cut resistance means the force necessary to cut the article at a cut length of 25 millimeters to cut.
• WO 97/25464 in that a staple fiber yarn with a staple fiber titer of above about 6 dtex leads to fabrics which, although having a very good cut resistance, are neither aesthetically acceptable nor offer adequate wearing comfort.
• 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) is 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 made fabric of a staple fiber yarn containing exclusively staple fibers having the higher titer T (B).
• the staple fiber yarn according to the invention comprises highly cut-resistant embodiments which, measured according to DIN EN 388, eg in 3 and are in which both the staple fiber titer T (A) and the staple fiber T (B) are well below 3 dtex, so that textile fabrics produced from such yarns not only have a high cut resistance, but also a high Wearing comfort and a pleasing appearance.
• 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 particularly preferred for the present invention is poly-para-phenylene terephthalamide, a homopolymer resulting from the mol: mol polymerization of para-phenylenediamine and terephthalic acid dichloride.
• Further suitable for the present invention as 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 incorporated in the polymer chain.
• the other diamines and / or other dicarboxylic acid chlorides may be incorporated in the polymer chain in a proportion of up to 10 mol%.
• polyolefins mean polyethylene or polypropylene.
• polyethylene is meant a substantially linear polyethylene material which has a molecular weight of preferably more than one million and may contain small amounts of chain branching or comonomers, a "small proportion” being understood to mean, per 100 carbon atoms in the main chain not more than 5 chain branches or comonomers are contained.
• the linear polyethylene material may additionally contain up to 50% by weight of one or more polymeric additives such as alkene-1 polymers, particularly low density polyethylene, low pressure polypropylene and the like, or low molecular weight additives such as antioxidants, UV absorbers, dyes and the like which are commonly incorporated become.
• polyethylene material is known as "extended chain polyethylene” (ECPE).
• 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 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
• the nitrogen-bonded aromatic groups are preferably six-membered rings as depicted in the structural units
• 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 and B by said selection ,
• the staple fibers A and the staple fibers B are each selected from only one of the groups.
• the 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 same group.
• staple fibers A and staple fibers B are selected from either the group of aramids or from the group of polyolefins or 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 fibers 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 in the introduction 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 denier 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 e.g. 4.5 dtex, but in any case under the condition that T (B): T (A) is in the range of 1.5: 1 to 8.8: 1.
• the total titre 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 fibers A and B provided in step a) of the process according to the invention may have been prepared by one of the known processes for producing staple fibers, e.g. by rupture or, preferably, by cutting the corresponding filaments to the desired length, e.g. in the range 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 fabric, such as a woven, knitted or knitted fabric of aramid, polyolefin, polybenzoxazole or polybenzothiazole fibers has been made 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.
• 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. ⁇ b> ⁇ u> Table 1: ⁇ / u> ⁇ /b> example 1V 1a 1b 1c % B (2.5 dtex) 100 70 50 30 % A (0.93 dtex) 0 30 50 70 Total weight [g] of the glove 34.7 35.4 36.5 37.3 Basis weight [g / m 2 ] of the glove 538 555 572 591 Thickness [mm] of the glove 2.17 2.10 2.04 2.13 Cut resistance (lowest single value) 6.9 8.1 7.7 8.6
• Table 1 shows that the cut resistance of the gloves made from staple fiber yarns according to the invention is higher by 12% (compare Example 1b with Example 1V) to 25% (compare Example 1c with Example 1V) than the corresponding values of the glove made from the comparative staple fiber yarn, although the total weight of these gloves increased 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% (cf. 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 which consists of 100% by weight of the staple fibers B having a denier of 2.5 dtex (Comparative Example 2V 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 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 twists are fed into a knitting machine and knitted in parallel, the needle spacing being 7 gg (7 needles per 2.54 cm), the stitch density in row 3.5 and in rods 4.
• 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 ⁇ / u> ⁇ /b> example Basis weight of the glove Weight% B (2.5 dtex) Wt% A (0.93 dtex) cutting force [g / m 2 ] [N] 2V 1 590 100 0 14.5 2a 580 70 30 16.7 2 B 596 30 70 16.9 2V 2 590 0 100 11.9
• 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 2V 1 ) to 17% (compare Example 2b with Example 2V 1 ) than the corresponding values of the glove made from the comparative staple fiber yarn ,
• the basis weight of the glove according to the invention of Example 2a is even 2% smaller and the weight per unit area of the glove according to the invention of Example 2b is only 1% greater than the basis weight of the comparative glove of Example 2V 1st
• 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 50:50 (Example 3a) and 70:30 (Example 3b) to be obtained.
• 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 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 ).
• 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 produced 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 1 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 staple fibers of smaller denier, which, given the in WO 97/25464 teaching should lead to a significantly reduced cutting force. 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.
• the basis weight of the inventive glove of Example 3a is even 10% smaller than the basis weight of the comparative glove of Example 3V 1 .
• 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 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.
• 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 (3)

Applications Claiming Priority (3)

Publications (2)

Family

ID=37591520

Family Applications (1)

Country Status (12)

Families Citing this family (5)

Family Cites Families (10)

• 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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