WO2004067823A1 - Woven fabric of high tear strength and process for producing the same - Google Patents

Woven fabric of high tear strength and process for producing the same Download PDF

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Publication number
WO2004067823A1
WO2004067823A1 PCT/JP2003/000948 JP0300948W WO2004067823A1 WO 2004067823 A1 WO2004067823 A1 WO 2004067823A1 JP 0300948 W JP0300948 W JP 0300948W WO 2004067823 A1 WO2004067823 A1 WO 2004067823A1
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WO
WIPO (PCT)
Prior art keywords
woven fabric
tear strength
strength
elongation
weft
Prior art date
Application number
PCT/JP2003/000948
Other languages
French (fr)
Japanese (ja)
Inventor
Noriki Fukunishi
Yoshihiro Matsui
Original Assignee
Toyo Boseki Kabusiki Kaisya
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Boseki Kabusiki Kaisya filed Critical Toyo Boseki Kabusiki Kaisya
Priority to PCT/JP2003/000948 priority Critical patent/WO2004067823A1/en
Publication of WO2004067823A1 publication Critical patent/WO2004067823A1/en

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Classifications

    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00Woven fabrics characterised by the material or construction of the yarn or other warp or weft elements used
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00Woven fabrics characterised by the material or construction of the yarn or other warp or weft elements used
    • D03D15/0027Woven fabrics characterised by the material or construction of the yarn or other warp or weft elements used using bicomponent threads
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00Woven fabrics characterised by the material or construction of the yarn or other warp or weft elements used
    • D03D15/0083Woven fabrics characterised by the material or construction of the yarn or other warp or weft elements used using threads having a particular sectional shape
    • DTEXTILES; PAPER
    • D10INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10BINDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/02Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
    • DTEXTILES; PAPER
    • D10INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10BINDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00Physical properties
    • D10B2401/06Load-responsive characteristics
    • D10B2401/063Load-responsive characteristics high strength
    • DTEXTILES; PAPER
    • D10INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10BINDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2501/00Wearing apparel
    • DTEXTILES; PAPER
    • D10INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10BINDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00Industrial
    • D10B2505/18Outdoor fabrics, e.g. tents, tarpaulins
    • DTEXTILES; PAPER
    • D10INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10BINDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2507/00Sport; Military
    • D10B2507/06Parachutes

Abstract

A woven fabric of high tear strength characterized in that the thickness thereof is 0.12 mm or less and that the tear strengths in the direction of warp cutting and in the direction of weft cutting are simultaneously 14.7 N or greater; and a process for producing a woven fabric of high tear strength characterized in that a polyamide multifilament having a strength at 10% elongation of 2.0 to 3.0 cN/dtex and an elongation at break of 40 to 50% is used in at least part of the warp and/or weft and woven into a rip stop texture. These have enabled providing a woven fabric of very soft feeling that, even when thin, is excellent in tear strength and is suitable for work of a function film such as a laminate.

Description

 TECHNICAL FIELD The present invention relates to a woven fabric for clothing having a thin and soft texture and excellent tear strength, and is particularly suitable for film processing of laminates and the like. It relates to the fabric used. Background art

 As represented by the art boom in recent years, consumers' leisure orientation has been increasing year by year, and as a result, apparel applications including sports fields such as skiing, snowboarding and outdoor wear, garments, sleeping bags, tents, paragliders, Demand for woven fabrics for materials such as parachute is increasing. By the way, high-strength fabrics are required for apparel applications including sports such as skiing wear, art doorwear, etc., and for materials such as tongues, sleeping bags, tents, paragliders, and parachutes. Improvement of strength and wear strength is required. In particular, when performing film processing such as lamination processing, the tear strength tends to decrease because yarn slippage of the woven fabric does not easily occur, and the strength is required to increase the tear strength of the base fabric more and more. Means for increasing the strength of polyamide filaments in order to obtain a fiber product having a high tensile strength are described in Japanese Patent Application Laid-Open Publication No. Hei 11-247702. A method for obtaining polyamide filaments is disclosed. However, such yarns have a high strength at 10% elongation, and when they are torn, stress tends to concentrate on one yarn, so that tearing in the case of woven fabric is worsened.

Many spinning conditions are disclosed in the publications for optimizing the balance of strength and elongation. Even if the tear strength was not satisfactory, it could not be obtained, or the single-fiber fineness was so large that only thick materials could be used. Even if a woven fabric is composed of yarns with a reduced number of threads, not only does the hand have a hard texture, but also the tear strength is significantly reduced due to structural factors such that the breaking strength when one single yarn is cut is significantly reduced. The problem is that high strength woven fabrics that can satisfy tear strength even on thin fabrics have not yet been solved.

 The present invention solves the above-mentioned problems of the prior art, provides a woven fabric excellent in tear strength even on a thin fabric, and particularly provides a method for producing a woven fabric that can be suitably used for film processing such as lamination. That is the task. Disclosure of the invention

 The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have finally completed the present invention. That is, the present invention has the following constitution.

 1. A woven fabric excellent in tear strength, characterized in that the woven fabric has a thickness of 0.12 mm or less and a tear strength of 14.7 N or more in both a warp cutting direction and a weft cutting direction.

 2. The woven fabric excellent in tear strength according to 1 above, wherein at least a part of the ground portion of the woven fabric has a ribstop structure.

 3. The woven fabric excellent in tear strength according to 1 above, wherein the woven fabric contains polyamide multifilament at least in a part of the warp and Z or weft.

 4. The woven fabric excellent in tear strength according to the above item 1, wherein at least one surface of the woven fabric is subjected to functional film processing.

 5. The woven fabric excellent in tear strength according to the above item 1, wherein at least one surface of the woven fabric is subjected to lamination processing.

 Use a polyamide multifilament with a strength at 2.0% elongation of 2.0 to 3.0 cN / dte X and an elongation at break of 40 to 50 mm for at least a part of the warp and Z or weft yarns. A method for producing a woven fabric having excellent tear strength, which is woven in a top structure.

 7. The method for producing a woven fabric having excellent tear strength according to the above item 6, wherein a functional film is applied to at least one surface of the woven fabric.

8. The sixth aspect, wherein the woven fabric is laminated on at least one side. 3. The method for producing a woven fabric excellent in tear strength according to 1.).

 Hereinafter, the present invention will be described in detail.

 It is desirable that the tear strength of the woven fabric of the present invention in the warp, yarn cutting direction and weft cutting direction by the single-tander method is 14.7 N or more. If the tear strength is less than 14.7N, it will be easily broken when used for sports applications, resulting in poor durability. In particular, when a film processing such as laminating is performed for the purpose of imparting moisture permeability and waterproofness, the tear strength tends to be remarkably reduced. It is particularly preferred to have However, even if the tear strength is high, a thick woven fabric is not so preferable, so that the thickness is preferably 98 N or less.

 The thickness of the woven fabric of the present invention is desirably 0.12 mm or less. If the thickness exceeds 0.12 mm, the texture will be hard, and if the film is processed, it will become thick and thick, which is undesirable for sports use. It is preferably 0.10 mm or less, and particularly preferably 0.08 mm or less. However, a woven fabric having a poor tear strength is not preferred, and therefore, it is preferably 0.02 mm or more.

The fiber used in the present invention is preferably a polyamide filament, and its relative viscosity is desirably 3.0 or more. If the relative viscosity is less than 3.0, problems such as product tearing due to insufficient breaking strength, reduced bursting strength, poor workability due to insufficient breaking elongation, and poor product durability are likely to occur. In this case, even if the balance of strength and elongation is adjusted, fibers with a low relative viscosity have a large number of molecular chain ends as indicated by a low molecular weight, so that the molecular chains are disordered and the fibers are bonded in the axial direction. Since the force is relatively low, the elongation at break (toughness) is low, and fluff and yarn breakage are likely to occur under high tension and high friction. When the relative viscosity exceeds 4.5, high toughness can be obtained.However, not only polymerization equipment and spinning equipment that can handle high viscosity are required, but productivity also decreases significantly due to the increase in viscosity. However, there is a problem that the cost of the yarn increases and it becomes impossible to supply inexpensive and high-performance products to consumers. The relative viscosity is preferably 3.3 or more and 4.5 or less, and more preferably 3.5 or more and 4.0 or less. The polyamide filament preferably has a strength at 10% elongation of 2.0 to 3.0 cN Zd teX. If the strength at 10% elongation is less than 2.OcNZd teX, it will be greatly affected by tension fluctuations during weaving, resulting in uneven dimensional stability and accompanying uneven shrinkage. Therefore, the dimensional stability of the product becomes unstable, resulting in a problem of increased product loss, which is not desirable. 2. More preferably, it is equal to or more than l cN / dte X. In addition, when the size is larger than 3. OcNZdtex, it is not desirable because the texture of the woven fabric becomes harder particularly when weaving is performed at high density. More preferably, it is 2.9 cN / dtex or less.

 The elongation of the polyamide filament is desirably 40% to 50%. If the elongation is less than 40%, the stress is about to be torn when the woven fabric is torn. If the tensile elongation of the yarn constituting the fabric is high, not only one yarn that is subject to stress tearing when the woven fabric is torn, but also a yarn that is likely to be torn next due to stretching of the yarn However, it is thought that stress is applied to the next yarn to be torn, and many yarns, and as a result, the stress applied to one yarn is reduced, and the tear strength is improved. Furthermore, the problem that the original yarn cannot follow the frictional resistance and tension change with various kinds of spliced parts due to the higher speed, higher density, and lower fineness of weaving causes the problem of increased frequency of yarn breakage. It is more preferably at least 41%. On the other hand, if it is more than 50%, even if various spinning and drawing conditions are adjusted, the breaking strength is lowered, and the problem that the tear strength of a woven fabric is lowered tends to occur, which is not preferable. More preferably, it is less than 49%.

Preferably, the fabric of the present invention has a rib-stop texture. The ribstop section that forms this lattice pattern is composed of two or more ground yarns, but generally consists of two to five yarns. Also, the ripstop may be a so-called double ripstop in which two or more aligned parts are connected continuously or one or several ground structures are inserted between them. By adopting such a structure, the number of filaments that resist tear stress in the aligned portion increases, and the tear strength is remarkably improved. The polyamide filament of the present invention is represented by nylon 6, nylon 46, and nylon 66, and may be a copolymer or a mixture mainly containing them. Copolymerization of a hygroscopic monomer to improve hygroscopicity, or a core-sheath conjugate fiber in which a hygroscopic resin is enclosed in the core may be used. Nylon 6 is preferably used from the viewpoint of softness and cost.

 The cross-sectional shape of the nylon yarn of the present invention is not particularly limited, and is represented by a round shape, a triangular shape, a hollow shape, and a cross shape, and may be an aggregate having a different cross section. The degree of irregularity and the void ratio are not particularly limited.

 The various additives to be added to the nylon yarn of the present invention are not particularly limited, and a hygroscopic substance, an antioxidant, a matting agent, an ultraviolet absorber, an antibacterial agent, etc. may be added alone or in combination. .

 The polyamide filament of the present invention may be subjected to crimping such as false twist.

 Hereinafter, the present invention will be described based on examples. The evaluation method used in the present invention is as follows.

 (Method of measuring relative viscosity)

 96.3 ± 0.1 Prepare a sample solution by dissolving the sample in a 1% by weight reagent-grade concentrated sulfuric acid so that the polymer concentration is 1 Omg / m 1, and adjust at 20 ° C ± 0.05 ° C. Measure the relative viscosity of the solution using an Ostwald viscometer with water falling seconds for 6 to 7 seconds at the above temperature. The same viscosity was measured using the same viscometer, and the relative viscosity was calculated based on the ratio of the drop time TO (sec) of 2 Oml of sulfuric acid and the drop time T 1 (sec) of 2 Om1 of the sample solution, the same as when the sample solution was prepared RV is calculated using the following equation.

 RV = T 1 / το

 (Measurement method of elongation at break and stress at 10% elongation)

Measure using Instron Japan Model 4310. As the initial load, 1/33 g was added to the yarn fineness (dtex.), And a yarn length of 20 cm and a pulling speed of 20 cm / min were prepared. The elongation at break and the stress at 10% elongation are read from the chart, and the average value of each is determined. (Method of measuring tear strength)

 The tear strength (single tanda A-1 method) specified in JIS L 1096 was adopted and measured at a speed of 15 cmZmin. The case of tearing the weft is defined as the weft tear strength.

 (Method of measuring thickness)

 For fabrics that have not been subjected to film processing, the thickness of the fabric (nun) is measured randomly at five points using a thickness gauge, and the average value is determined.

With respect to the fabric on which the film is processed, five points are randomly measured from observation by SEM, and the average value is obtained. BEST MODE FOR CARRYING OUT THE INVENTION

 (Example 1)

 Relative viscosity 7) Nylon 6 polymer with 1- = 3.51 was melt-spun from a die with 24 round holes at a spinning temperature of 280 ° C and drawn at a spinning speed of 240 Om / min and a drawing temperature of 16 Ot: A multifilament of 33 decitex and 24 filaments having an elongation of 2.70 c NZd te X and an elongation of 43% at 10% elongation was obtained. The yarn was used for warp and weft, and the warp density was set to 133 yarns, 2.5 cm, and the weft density to 127 yarns / 2.54 cm, and weaving was performed using a ripstop structure.

 The obtained woven fabric was refined and dyed according to a conventional method to obtain a fabric having a warp density of 139 yarns / 2.54 cm and a weft yarn density of 134 yarns / 2.54 cm. The obtained fabric had a weft tear strength of 25.5 N, a tear strength of 32.3 N, and a thickness of 0.08 mm. The texture was very soft and the tear strength was excellent despite the thin fabric. In addition, when laminated according to the usual method, the tear strength was 21.6 N for weft tear strength and 29.4 N for tear strength, which was sufficient for sports use.

 (Example 2)

Melt spinning of nylon 6 polymer with relative viscosity r? R = 3.51 from a die having 34 round holes at a spinning temperature of 285 ° C, drawing at a spinning speed of 230 Om / min, and a drawing temperature of 160 ° C, Strength at 10% elongation 2.39 c NZd te X, elongation 4 7. A 4% multifilament of 44 decitex 34 filaments was obtained. The yarn was used as a warp and a weft, and the warp density was set to 145 yarns / 2.54 cm and the weft yarn density to 124 yarns / 2.54 cm, and weaving was performed with a ribstop structure.

 The obtained woven fabric was refined and dyed according to a conventional method to obtain a woven fabric having a warp density of 157 yarns / 2.54 cm and a weft yarn density of 124 yarns / 2.54 cm. The obtained fabric had a weft tear strength of 43.1 N, a tear strength of 46.1 N, and a thickness of 0.10 mm. The texture was very soft and the tear strength was very good despite the thin fabric.

 (Comparative Example 1)

 Example 1 was followed except that the stretching ratio was changed, the strength at 10% elongation was 3.5 cN / dteX, and the elongation was 35%. The obtained fabric had a weft tear strength of 10.8 N, a tear strength of 17.6 N and a thickness of 0.08 mm. The texture was very soft, but the weft tearing strength was poor.

 (Comparative Example 2)

 By changing the fineness to 88 decitex and 24 filaments, a multifilament having a strength at 10% elongation of 2.50 cN / dtex and an elongation of 50% was obtained. A woven fabric with a ripstop design and a density of 85 warp Z 2.54 cm and 82 weft Z 2.54 cm was prepared. The obtained fabric had a weft tear strength of 31.4 N, a tear strength of 44.1 N, and a thickness of 1.35 mm. The texture was very hard and unfit for sports.

 (Comparative Example 3)

 Example 1 was followed except that weaving was carried out by plain weaving. The obtained woven fabric was refined and dyed according to a conventional method to obtain a woven fabric having a warp density of 138 yarns / 2.54 cm and a weft yarn density of 132 yarns / 2 • 54 cm. The obtained fabric had a weft tear strength of 11.8 N, a tear strength of 9.8 N, and a thickness of 0.08 mm. The texture was very soft and thin, and the tear strength was very poor. Industrial applicability

According to the present invention, even if it is thin, it has excellent tear strength, and functional film processing like lamination It is possible to provide a fabric having a very soft texture. '' The fabric with excellent tear strength of the present invention is suitable for use in clothing, including sports such as skis, snowport wear, and outdoor wear, and for materials such as tongues, sleeping bags, tents, paragliders, and parachutes. Is what is done.

Claims

1. A fabric having excellent tear strength, characterized in that the thickness of the fabric is 0.12 mm or less and the tear strength in both the warp cutting direction and the weft cutting direction is 14.7 N or more.
 2. The woven fabric having excellent tear strength according to claim 1, wherein at least a part of the ground portion of the woven fabric has a ripstop structure.
 Contract
 3. The woven fabric excellent in tear strength according to claim 1, wherein the woven fabric contains polyamide multifilament at least in a part of the warp and / or the weft.
4. The woven fabric having excellent tear strength according to claim 1, wherein a functional film is applied to at least one surface of the woven fabric.
 5. The woven fabric excellent in tear strength according to claim 1, characterized in that at least one side of the woven fabric is laminated.
 6.Use a polyamide multifilament with a strength at 10% elongation of 2.0 to 3.0 cN / dte X and an elongation at break of 40 to 50% for at least a part of the warp and / or weft to form a ripstop structure. A method for producing a woven fabric having excellent tear strength, characterized by weaving.
 7. The method for producing a woven fabric having excellent tear strength according to claim 6, wherein a functional film is applied to at least one surface of the woven fabric.
 8. The method according to claim 6, wherein at least one surface of the woven fabric is laminated.
PCT/JP2003/000948 2003-01-30 2003-01-30 Woven fabric of high tear strength and process for producing the same WO2004067823A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2003/000948 WO2004067823A1 (en) 2003-01-30 2003-01-30 Woven fabric of high tear strength and process for producing the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2003303827A AU2003303827A1 (en) 2003-01-30 2003-01-30 Woven fabric of high tear strength and process for producing the same
PCT/JP2003/000948 WO2004067823A1 (en) 2003-01-30 2003-01-30 Woven fabric of high tear strength and process for producing the same

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000211459A (en) * 1999-01-21 2000-08-02 Toray Ind Inc Foundation cloth for air bag
JP2000234272A (en) * 1999-02-10 2000-08-29 Toray Ind Inc Paraglider cloth
JP2001089949A (en) * 1999-09-14 2001-04-03 Toray Ind Inc Woven fabric for airbag

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000211459A (en) * 1999-01-21 2000-08-02 Toray Ind Inc Foundation cloth for air bag
JP2000234272A (en) * 1999-02-10 2000-08-29 Toray Ind Inc Paraglider cloth
JP2001089949A (en) * 1999-09-14 2001-04-03 Toray Ind Inc Woven fabric for airbag

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Publication number Publication date
AU2003303827A1 (en) 2004-08-23

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