JP2009074213A - Multifilament and high-density woven fabric - Google Patents

Multifilament and high-density woven fabric Download PDF

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JP2009074213A
JP2009074213A JP2007246660A JP2007246660A JP2009074213A JP 2009074213 A JP2009074213 A JP 2009074213A JP 2007246660 A JP2007246660 A JP 2007246660A JP 2007246660 A JP2007246660 A JP 2007246660A JP 2009074213 A JP2009074213 A JP 2009074213A
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dtex
multifilament
density
high
fineness
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JP4872865B2 (en
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Yushi Nagamachi
Tomohiro Oguchi
Hiroshi Yamamoto
朝弘 小口
浩史 山本
祐志 長町
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Toray Ind Inc
東レ株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-tenacity and fine-denier multifilament having excellent weaving performance and giving a high-density woven fabric especially suitable for sportswear, and a high-density woven fabric produced by using the multifilament. <P>SOLUTION: The multifilament is formed of a polyethylene terephthalate having an intrinsic viscosity of 0.70-1.20 and containing 0.3-0.8 wt.% titanium oxide wherein 60% or more of the total number of the titanium oxide particles has a primary particle diameter of 0.1-0.6 μm, and the multifilament has a total fineness of 4-15 dtex, a single fiber fineness of 1.3-5.0 dtex, a breaking strength of 5.0-7.0 cN/dtex, and an elongation at break of 25-45%. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a high-strength fineness multifilament capable of forming a high-density thin fabric suitable for sports clothing, and a high-density fabric using these.

  Conventionally, many high-density fabrics using synthetic fiber multifilaments such as polyester and nylon have been proposed mainly for sports apparel and airbags. In addition, there is a demand for fabrics with increased strength associated therewith. Further, there is a strong demand for higher-density fabrics from the standpoint of improving windproof properties and preventing down-jumping of down jackets in air bags as well as sports and outdoor clothing.

  As a proposal corresponding to these, a high density woven fabric having a cover factor of 1500 to 2500 using a polyester yarn having a single yarn fineness of 0.5 to 3.0 dtex and a tensile strength of 5.0 to 9.0 dtex is proposed. (Patent Document 1). This proposal makes it possible to increase the density to some extent, but since the polyester-based polymer that constitutes the yarn is not specified, when the cover factor is about 2500, warp breakage at the time of weaving and generation of fuzz of the warp occurs. Is a problem. Further, when the cover factor is about 2500, it is not possible to meet the demand for sufficiently thinning and high density.

In addition, there are proposals in Patent Documents 2 to 3 as high-density fabrics, but since the main application is airbags, the total fineness of multifilaments used is high and does not correspond to the thinning of fabrics intended in the present invention. . Furthermore, a high-density fabric with a cover factor of 1500 or more, a constituent warp and weft containing an organic pigment of 200 ppm or more, and a single yarn fineness of 1.0 dtex or less has been proposed (Patent Document 4). In this method, since the single yarn fineness is too small, there is a problem that warp generation is particularly large during weaving.
JP 2006-52505 A (Claims 1 to 4) JP-A-7-258940 (Claim 12) JP-A-8-246289 (Example 1) JP 2004-107843 A (Claim 1)

  The present invention provides an ultra-lightweight, high-density thin woven fabric that improves the drawbacks of the prior art and is free from warp and weft breakage and fluff generation during weaving and has excellent mechanical properties.

  The object of the present invention can be achieved by the following. That is, polyethylene containing 0.3 to 0.8% by weight of titanium oxide having an intrinsic viscosity of 0.70 to 1.20 and 60% or more of the total number of titanium oxide particles having a primary particle size of 0.1 to 0.6 μm. A multifilament comprising terephthalate and having a total fineness of 4 to 15 dtex, a single yarn fineness of 1.3 to 5.0 dtex, a breaking strength of 5.0 to 7.0 cN / dtex, and a breaking elongation of 25 to 45%. is there.

  By using the multifilament of the present invention, there is no yarn breakage or fluff generation during weaving, and a high-density thin fabric with mechanical properties can be obtained.

  The multimonofilament of the present invention needs to be made of polyethylene terephthalate having an intrinsic viscosity of 0.70 to 1.20. From the viewpoint of weather resistance, dimensional stability, and mechanical properties, the multifilament of the present invention needs to be made of polyethylene terephthalate. A small amount of a copolymer component may be contained as long as the purpose is not impaired. Further, by setting the intrinsic viscosity to 0.70 or more, the breaking strength necessary in the present invention can be obtained. Moreover, it becomes possible to manufacture stably by setting it as 1.20 or less. A preferable range of intrinsic viscosity is 0.75 to 1.00.

  As a result of intensive studies, the present inventors have found that not only the amount of titanium oxide added but also the distribution of the primary particle size of titanium oxide added in order to improve the weaving property of multifilaments with fineness. I found that it had a big influence. That is, the multifilament of the present invention needs to contain 0.3 to 0.8% by weight of titanium oxide, and 60% or more of the total number of titanium oxide particles contained is primary particles. The diameter needs to be 0.1 to 0.6 μm. By making the content of titanium oxide 0.3% by weight or more, it becomes possible to sufficiently reduce the friction between the running yarn and the metal. By making the content 0.8% by weight or less, the desired raw yarn strength In addition, it is possible to suppress rubbing between the metal and the raw yarn that come into contact during weaving. Further, 60% or more of the total number of titanium oxide particles needs to have a primary particle size of 0.1 to 0.6 μm. By setting the distribution of the primary particle diameter of titanium oxide within a specific range, it becomes possible to reduce the rubbing with the warp of the warp as much as possible during weaving. More preferably, 30% or more of the total number of titanium oxide particles is 0.2 to 0.4 μm. Moreover, as long as it does not impair the object of the present invention, in addition to titanium oxide, it contains inorganic particles such as silica and alumina, organic pigments, antioxidants, anti-coloring agents, antistatic agents, light-proofing agents and the like in small amounts. May be.

  The multifilament of the present invention needs to have a total fineness of 4 to 15 dtex. When it is set to 4 dtex or more, it becomes possible to stably produce and weave yarns, and when it is set to 15 dtex or less, the intended ultra-high density thin woven fabric can be obtained. A preferable range of the total fineness is 8 to 13 dtex.

  Furthermore, the multifilament of the present invention needs to have a single yarn fineness of 1.3 to 5.0 dtex. By setting the single yarn fineness to 1.3 dtex or more, yarn breakage and fluff generation during weaving can be suppressed, and a dense high-density fabric can be obtained. Moreover, by setting it as 5.0 dtex or less, the obtained textile fabric has a favorable texture, without becoming too hard, maintaining a compactness. A preferred single yarn fineness range is 1.6 to 3.0 dtex.

  Next, the screen filament monofilament of the present invention has a breaking strength of 5.0 to 7.0 cN / dtex and a breaking elongation of 25 to 45%. The breaking strength and breaking elongation here refer to the strength and elongation at the breaking point in the tensile test. By setting the breaking strength to 5.0 cN / dtex or more, sufficient mechanical properties can be obtained even as a thin high-density fabric, and by setting it to 7.0 cN / dtex or less, it is necessary for stable yarn production and weaving. It is possible to leave an appropriate elongation of the raw yarn. A preferred range of breaking strength is 5.5 to 6.5 cN / dtex. By setting the elongation at break to 25% or more, it is possible to make fluff less likely to occur during weaving, and by setting it to 45% or less, the desired breaking strength can be obtained. The range of preferable breaking elongation is 30 to 40%.

Further, a high-density woven fabric can be obtained by arranging the multifilament of the present invention on warp and weft. Since the multifilament of the present invention has an extremely low fineness of 4 to 15 dtex, it is preferable that the obtained high-density fabric has a cover factor of 2500 or more represented by the following formula. The cover factor is a coefficient representing the density of the fabric structure determined by the thickness of the yarn constituting the fabric and the fabric density, and the larger the value, the higher the density.
Cover factor = warp density (main / 2.54 cm) × (warp fineness (dtex)) 1/2 + weft density (main / 2.54 cm) × (weft fineness (dtex) 1/2
Furthermore, in order to maintain the mechanical properties of the fabric, it is preferable to design the resulting high-density fabric so that the tear strength in both the warp direction and the weft direction is 100 to 500 cN. The structure of the high-density fabric is not particularly limited, and any structure can be preferably applied depending on the application. Although the weaving machine is not particularly limited, a thruzer or rapier loom can be preferably used because of its fineness.

The present invention is described in detail below. In addition, the evaluation in an Example followed the following evaluation methods.
A. Intrinsic viscosity A sample of 0.10 g was dissolved in 10 ml of orthochlorophenol, and measured using an Ostwald viscometer at a temperature of 25 ° C.
B. Titanium oxide primary particle size distribution After preparing titanium oxide particles as ethylene glycol slurry and adjusting the slurry concentration so that the absorbance is in the range of 1.0 to 0.5 using HORIBA CAPA-700 The particle size distribution was measured while centrifugal sedimentation. Measurement was performed at N = 10, and the average value of the abundance ratio (%) of the primary particle diameter of 0.1 to 0.6 μm was obtained.
C. Tensile strength at break Using a Tensilon tensile tester manufactured by Toyo Baldwin, the value at the break point was determined from the stress-strain curve under the conditions of a test length of 20 cm and a pulling speed of 20 cm / min.
D. Tearing strength About the obtained textile fabric, the tear strength of the warp direction and the weft direction was measured according to JIS L1096.88.15.5D method (penjuram method).
E. Spinning property In obtaining a monofilament by the method of Examples described later, the yield of multifilament obtained from 1000 kg of chip raw material is 100% or less 90% or more, ◯, less than 90% to 80% or more, ○, less than 80% -70% or more was made into (triangle | delta), less than 70% was made into x, and (circle) and (circle) were set as the pass.
F. Weaving process passability The passability (yarn breakage and fluff generation) in the weaving process was relatively evaluated in four stages of OO, ◯, △, and X, and ◯ and ◯ were regarded as acceptable.
G. Comprehensive evaluation Each evaluation item was comprehensively judged and evaluated in four stages of XX, XX, △, and X, and XX and ◯ were regarded as acceptable.

Example 1
Polyethylene terephthalate having an intrinsic viscosity of 0.78 and a titanium oxide content of 0.5% by weight was melted, led to a spinning pack at 300 ° C., and the undrawn yarn was once wound at a speed of 800 m / min. Next, it was stretched 4.3 times and heat-treated at 130 ° C. to obtain multifilaments of 12 dtex 5 filaments. There was no problem in the yarn forming property, and it was good. In the titanium oxide added to the polyethylene terephthalate used, 68% of the total number of particles was in the range of primary particle diameter of 0.1 to 0.6 μm. Moreover, the breaking strength and elongation of the multifilament were 5.6 cN / dtex and 34%, respectively.

This multifilament was used for warp and weft, warped by a conventional method, and woven with a slewer loom to obtain a plain fabric with a warp density of 380 / 2.54 cm and a weft density of 380 / 2.54 cm. At this time, the process passability was very good, and no particular problem was found. The obtained fabric had a tear strength of 310 cN and a basis weight of 41 g / m 2 , and was excellent in lightness.

Examples 2-3 and Comparative Examples 1-2
A multifilament was obtained by the same method as in Example 1 except that the intrinsic viscosity of polyethylene terephthalate was changed as shown in Tables 1 and 2, and a woven fabric was obtained by the same method as in Example 1. The results are summarized in Table 1 and Table 2.

Examples 4-5, Comparative Examples 3-4
A multifilament was obtained in the same manner as in Example 1 except that the amount of titanium oxide in polyethylene terephthalate was changed as shown in Tables 1 and 2, and a woven fabric was obtained in the same manner as in Example 1. The results are summarized in Table 1 and Table 2.

Example 6 and Comparative Example 5
A multifilament was obtained in the same manner as in Example 1 except that polyethylene terephthalate having a different titanium oxide primary particle size distribution was used, and a woven fabric was obtained in the same manner as in Example 1. The results are summarized in Table 1 and Table 2.

Examples 7-8, Comparative Examples 6-7
The discharge amount at the time of spinning was changed, and the other methods were the same as in Example 1. In Example 7, 4 dtex 3 filaments, in Example 8 15 dtex 6 filaments, in Comparative Example 6 25 dtex 10 filaments, in Comparative Example 7 3 dtex 2 filaments A filament was obtained. In Comparative Example 7, the yarn forming property was extremely poor, and a multifilament sufficient for a woven fabric could not be obtained. About the obtained multifilament, in Example 7, the warp density was 650 pieces / 2.54 cm, the weft density was 650 pieces / 2.54 cm, and in Example 8, the warp density was 340 pieces / 2.54 cm, and the weft density was 340 pieces / 2.54 cm. In Comparative Example 6, fabrics having a warp density of 240 / 2.54 cm and a weft density of 240 / 2.54 cm were obtained in the same manner as in Example 1. In Comparative Example 6, it was difficult to increase the density of the fabric, and the fabric was subjected to light weight. The results are summarized in Table 1 and Table 2.

Examples 9-10, Comparative Examples 8-9
The base at the time of spinning was changed, and the other methods were the same as in Example 1. In Example 9, 12 dtex 8 filament, in Example 10, 15 dtex 3 filament, in Comparative Example 8 12 dtex 14 filament, in Comparative Example 9 12 dtex 2 filament multifilament Got. With respect to the obtained multifilament, woven fabrics were obtained in the same manner as in Example 1, except that in Example 10, the warp density was 340 pieces / 2.54 cm. In Comparative Example 9, the convergence of the multifilament was poor, the process passability was poor, and the texture of the resulting fabric was hard. The results are summarized in Table 1 and Table 2.

Example 11
A woven fabric was obtained in the same manner as in Example 1 except that the multifilament obtained in Example 1 was used for warp and weft and the warp density was 310 yarns / 2.54 cm and the weft density was 310 yarns / 2.54 cm. The results are shown in Table 1.

Comparative Examples 10-11
Compared to Example 1, the discharge amount during spinning and the draw ratio were changed, and Comparative Examples 10 and 11 were obtained. The results are summarized in Table 2.

  The multifilament and high-density fabric obtained by the method of the present invention are excellent in mechanical properties and light weight, and can be preferably used for sports clothing, outdoor clothing, and the like.

Claims (2)

  1.   From polyethylene terephthalate containing 0.3 to 0.8% by weight of titanium oxide having an intrinsic viscosity of 0.70 to 1.20 and 60% or more of the total number of titanium oxide particles having a primary particle diameter of 0.1 to 0.6 μm A multifilament having a total fineness of 4 to 15 dtex, a single yarn fineness of 1.3 to 5.0 dtex, a breaking strength of 5.0 to 7.0 cN / dtex, and a breaking elongation of 25 to 45%.
  2. A high-density fabric using the multifilament according to claim 1 for warp and weft, having a cover factor of 2500 or more and a tear strength of 100 to 500 cN shown in the following formula.
    Cover factor = warp density (main / 2.54 cm) × (warp fineness (dtex)) 1/2 + weft density (main / 2.54 cm) × (weft fineness (dtex) 1/2
JP2007246660A 2007-09-25 2007-09-25 Multifilament and high density fabric Active JP4872865B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019107111A1 (en) 2017-11-28 2019-06-06 東レ株式会社 High-strength fine-denier polyester multifilament

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08100325A (en) * 1994-09-29 1996-04-16 Toray Ind Inc High-tenacity polyester fiber
WO2000026301A1 (en) * 1998-10-30 2000-05-11 Asahi Kasei Kabushiki Kaisha Polyester resin composition and fiber
WO2003072862A1 (en) * 2002-02-28 2003-09-04 Toyo Boseki Kabusiki Kaisya Full-dull high-density woven fabric with eliminated gloss
JP2004044018A (en) * 2002-07-11 2004-02-12 Toyobo Co Ltd High-density textile fabric
JP2005240265A (en) * 2004-01-30 2005-09-08 Toyobo Co Ltd Ultralightweight waterproof polyester woven fabric
JP2007113151A (en) * 2005-10-21 2007-05-10 Toray Ind Inc Melt spinning method of polyester monofilament for screen gauze and polyester monofilament for screen gauze

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08100325A (en) * 1994-09-29 1996-04-16 Toray Ind Inc High-tenacity polyester fiber
WO2000026301A1 (en) * 1998-10-30 2000-05-11 Asahi Kasei Kabushiki Kaisha Polyester resin composition and fiber
WO2003072862A1 (en) * 2002-02-28 2003-09-04 Toyo Boseki Kabusiki Kaisya Full-dull high-density woven fabric with eliminated gloss
JP2004044018A (en) * 2002-07-11 2004-02-12 Toyobo Co Ltd High-density textile fabric
JP2005240265A (en) * 2004-01-30 2005-09-08 Toyobo Co Ltd Ultralightweight waterproof polyester woven fabric
JP2007113151A (en) * 2005-10-21 2007-05-10 Toray Ind Inc Melt spinning method of polyester monofilament for screen gauze and polyester monofilament for screen gauze

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019107111A1 (en) 2017-11-28 2019-06-06 東レ株式会社 High-strength fine-denier polyester multifilament

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