JP2014214388A - Thin woven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a woven fabric which is light and thin and has performances such as low in permeability and high in tear strength, and yet is excellent in antifouling properties.SOLUTION: A woven fabric includes a synthetic multifilament having a fineness of 5-40 dtex. The woven fabric has a basis weight of 15-70 g/m, a tear strength of 8-50 N, a permeability of 0.3-1.5 cc/cmsec. A low molecular weight polyolefin having a viscosity average molecular weight Mv of 500-20,000 is attached to the woven fabric.

Description

  The present invention relates to a thin fabric used mainly for outdoor clothing such as down jackets and sleeping bags, sports clothing such as windbreakers, daily life materials, futon side fabrics, etc., in particular, lightweight and thin fabric, and antifouling properties. It is related to a thin fabric with high tear strength.

  Conventionally, textiles for clothing used in outdoor sports and the like have been required to be lightweight and thin so that the wearer can exercise smoothly. In addition, the fabric used for the futon side (futon cover, futon sheet), etc., should be made as light and thin as possible for the purpose of lightening the bedding in order to enhance the comfort at bedtime.

  On the other hand, in order to finish a woven fabric to be light and thin, it is necessary to reduce the fineness of the yarn constituting the woven fabric. However, if the fineness of the yarn is reduced, sufficient yarn strength cannot be ensured, and the tear strength of the fabric decreases, which may cause the fabric to break easily and hinder practical use.

  Moreover, these outdoor sports clothing fabrics and side fabrics for futons are also important to prevent the batting of the batting, and in order to prevent the batting from coming off (down proofing), the fabric should be made dense. , Lowered its air permeability. However, if the woven fabric has a dense and high-density structure, the woven fabric becomes hard and cannot be freely deformed against stress, and the tear strength tends to decrease.

As an example of dealing with such a problem, for example, a method is known in which a softener or a smoothing agent such as a silicone resin is attached to the surface of the fabric to improve slippage between yarns, and in addition, the fabric is given flexibility. ing. In Patent Document 1, the fineness of the synthetic multifilament is 15 to 40 dtex, the fabric weight is 15 to 60 g / m ² , the tear strength is 8 to 20 N, and resin processing is performed with a silicone resin. A thin fabric characterized by the above is disclosed.

JP 2008-101295 A

  However, while the fabric described in Patent Document 1 is lightweight and thin, it has sufficient tear strength, but has been treated with silicone resin, so it binds to dirt adhered to the fabric and is washed. However, there was a problem that the dirt was difficult to remove. In addition to soiling directly attached to the fabric, for example, if multiple soiled clothes are washed at the same time, soiling components will float in the washing solution, but the soil removed from the clothing will reappear on the fabric processed with silicone resin. It sometimes adhered. As described above, there is a problem that the fabric is further soiled by washing.

  Under such circumstances, the present invention has been aimed at providing a fabric that is lightweight and thin, has low air permeability, high tear strength, and excellent antifouling properties. .

  As a result of intensive studies to solve the above problems, the present inventors have been able to achieve both sufficient tear strength and antifouling property even in a lightweight and thin fabric by attaching a low molecular weight polyolefin to the fabric. The present invention has been completed.

That is, the woven fabric according to the present invention is a woven fabric including a synthetic multifilament having a fineness of 5 to 40 dtex. The woven fabric has a basis weight of 15 to 70 g / m ² , a tear strength of 8 to 50 N, and an air permeability of 0.3. a ~1.5cc / cm ² · sec, fabrics viscosity average molecular weight Mv, characterized in that low molecular weight polyolefin of 500 to 20,000 are attached. The low molecular weight polyolefin is preferably an oxidized polyethylene and / or an acid-modified polyethylene having a viscosity average molecular weight Mv of 1,000 to 7,000. Moreover, it is desirable that the monofilament constituting the synthetic multifilament has a multi-leafed cross section with a degree of deformity of 1.5 to 4. On the other hand, it is also desirable that the monofilament constituting the synthetic multifilament has a flat cross section with a flatness of 3 to 8. Furthermore, it is preferable that at least one surface of the thin fabric is calendered.

  According to the present invention, by attaching a low molecular weight polyolefin to a woven fabric, it is possible to provide a soft woven fabric that has a strong tearing strength, is resistant to soiling, and has a lightweight, thin ground fabric and ensures down-proofing properties. it can. Therefore, the woven fabric according to the present invention can be used for, for example, outdoor sports clothing, futon side fabrics, and the like.

It is explanatory drawing which illustrates typically the Y-shaped nozzle | cap | die discharge hole used for this invention. It is explanatory drawing which illustrates typically an example of the ripstop taffeta structure | tissue used for the textile fabric of this invention.

  The fabric according to the present invention is characterized in that a low molecular weight polyolefin is adhered to a fabric having desired characteristics. In order to finish the woven fabric into a lightweight thin fabric, it is necessary to prevent the tear strength of the fabric from significantly lowering. For example, when used for sports apparel and futon side, the thin fabric has a tear strength of about 8-50N. Must be secured. In addition, the fabric becomes dirty with use, but by applying a low molecular weight polyolefin to the fabric, the tear strength of the fabric is prevented from being lowered and the stain is less likely to adhere to the fabric.

  The reason why the tear strength of the woven fabric is improved by attaching the low molecular weight polyolefin to the woven fabric may be that the slip of the yarn is changed by the low molecular weight polyolefin adhering to the woven fabric. In general, a woven fabric is torn when a stress (for example, a force acting in the direction of tearing the woven fabric from the outside) concentrates on a tissue point of the woven fabric, and a yarn constituting the woven fabric is cut. However, when the low molecular weight polyolefin is attached to the fabric, the yarn tends to slip, and even if stress acts on the texture point, the stress is dispersed by the slip of the yarn, and as a result, the fabric is difficult to tear (that is, Improved tear strength). Thereby, even if it is a case where a textile fabric is comprised using a thin thread | yarn, conventionally the malfunction that a textile fabric tears with a little force can be improved, and tearing strength 8N or more can be achieved. Moreover, even if the dirt adheres to the tissue points or the fiber gaps such as monofilaments and synthetic multifilaments, slipping of the yarn surface can be improved by attaching low molecular weight polyolefin, or the dirt can be easily removed by washing. Can do. Moreover, although the reason is not certain, it is possible to suppress the reattachment of dirt during washing.

  Low molecular weight polyolefin is a polymer that has in part a structural unit derived from olefins, such as a polymer obtained by polymerizing a kind of olefin, or a copolymer that partially includes structures derived from olefins. Is included.

  As olefins, α-olefins can be preferably used. As the α-olefin, an unsaturated hydrocarbon having 2 to 8 carbon atoms is preferably used, and more preferably an unsaturated hydrocarbon having 2 to 5 carbon atoms. Examples of the α-olefin include ethylene; propene; unsaturated hydrocarbon having 4 carbon atoms such as 1-butene and 2-methyl-1-propene; 1-pentene, 2-methyl-1-butene and 3-methyl-. C 5 unsaturated hydrocarbon such as 1-butene; 1-hexene, 2-methyl-1-pentene, 3-methyl-1-pentene, 4-methyl-1-pentene, 2-ethyl-1-butene, etc. 1-heptene, 2-methyl-1-hexene, 3-methyl-1-hexene, 4-methyl-1-hexene, 5-methyl-1-hexene, 2-ethyl- C7 unsaturated hydrocarbons such as 1-pentene, 3-ethyl-1-pentene, 2,3-dimethyl-1-pentene; 1-octene, 2-methyl-1-heptene, 3-methyl-1- Heptene, 4-methyl-1-he Ten, 5-methyl-1-heptene, 6-methyl-1-heptene, 2-ethyl-1-hexene, 3-ethyl-1-hexene, 4-ethyl-1-hexene, 2,3-dimethyl-1- C8 unsaturated carbonization such as hexene, 2,4-dimethyl-1-hexene, 2,5-dimethyl-1-hexene, 3,4-dimethyl-1-hexene, 3,5-dimethyl-1-hexene Hydrogen; and the like. Among them, the low molecular weight polyolefin is a copolymer of polyethylene, polypropylene, polyethylene and an α-olefin having 3 to 8 carbon atoms (containing 50% or more of structural units derived from ethylene with respect to all structural units of the low molecular weight polyolefin). However, it is preferably 70% or more), and can be preferably used in the present invention because it has a high effect of improving tear strength and antifouling properties.

  The low molecular weight polyolefin has a viscosity average molecular weight Mv of 500 to 20,000, more preferably 700 to 10,000, and still more preferably 1,000 to 7,000. When the viscosity average molecular weight Mv is within the above range, the tear strength of the fabric can be increased, and further, the antifouling property can be imparted to the fabric. Further, in a high molecular weight polyethylene having a viscosity average molecular weight Mv exceeding 20,000, the molecular chain becomes too large and the tear strength may not be improved.

  Further, as the low molecular weight polyolefin, those obtained by oxidizing or acid-modifying the above low molecular weight polyolefin are also preferably used. Oxidized or acid-modified low molecular weight polyolefin has good water dispersibility and high affinity with fibers, so that preparation and processing of the formulation liquid are facilitated and storage stability of the formulation liquid is improved.

  The oxidized polyolefin refers to a polyolefin having a carbonyl group in the molecule that is deteriorated by air oxidation or heating of the polyolefin, and the resulting carbonyl group is present in the molecule.

  The acid-modified polyolefin refers to a polymer in which an acid component is introduced into the molecular structure of the polyolefin. Examples of the acid-modified polyolefin include a polymer obtained by block copolymerization of an olefin and a carboxylic acid having a vinyl group (for example, acrylic acid, methacrylic acid, etc.), and a polymer obtained by graft polymerization of an acid component (for example, maleic acid) to the polyolefin. And the like.

The acid value of the above-mentioned oxidized or acid-modified low molecular weight polyolefin is preferably 3 to 80 mgKOH / g, more preferably 15 to 70 mgKOH / g. When the acid value is less than 3 mgKOH / g, it is difficult to stably disperse the low molecular weight polyolefin in the liquid. In such a case, for example, a dispersion aid such as a surfactant may be added to the liquid to improve the dispersibility of the low molecular weight polyolefin. If the acid value exceeds 80 mgKOH / g, the water resistance of the thin fabric may be lowered.
The “acid value” refers to the amount (mg) of potassium hydroxide required to neutralize the acidic component contained in 1 g of oxidized or acid-modified polyolefin.

  Furthermore, it is preferable that melting | fusing point of low molecular weight polyolefin is 90-150 degreeC. More preferably, it is 100-120 degreeC. When the melting point of the low molecular weight polyolefin is less than 90 ° C., the polyolefin is likely to fall off from the fiber, and there is a possibility that the effect of improving the tearing strength and the antifouling property by adhering the polyolefin are not sufficiently exhibited. When the melting point of the low molecular weight polyolefin exceeds 150 ° C., such a resin is relatively polymerized, so that the molecular chain becomes too large and the water dispersibility tends to be lowered. If dispersibility in water is difficult, it must be dissolved in an organic solvent and processed into fibers.

  Specific examples of such low molecular weight polyethylene include, for example, high wax 100P (melting point 116 ° C.), 800P (melting point 127 ° C.), 110P (melting point 109 ° C.), 420P (melting point 118 ° C.), etc. (Mitsui Chemicals, melting point is DSC method).

  Examples of the polyethylene oxide include AC-629, AC-540 (manufactured by Allied Chemical Co., Ltd.), high wax 4051E (melting point 115 ° C., acid value 12), 4052E (melting point 110 ° C., acid value 20), 4202E. (Melting point: 100 ° C., acid value: 17) (Mitsui Chemicals, Inc., melting point is determined by DSC method, acid value is determined by JIS K0070. The same applies to the high wax series) Sun wax E-300 (softening point 103 .5 ° C, acid value 22, Sanyo Chemical Industries, Ltd.) and the like.

  Examples of the acid-modified polyethylene include high wax 2203A (melting point 170 ° C., acid value 30), 1105A (melting point 104 ° C., acid value 60), and the like.

  Furthermore, as low molecular weight polyethylene (including polyethylene oxide and acid-modified polyethylene) commercially available as a dispersion, for example, Hitech E-4A (softening point 138 ° C.), E-68A (softening point 110 ° C.), E-5403B (Softening point 108 ° C), E-4B (softening point 138 ° C), E-1000 (softening point 138 ° C), E-4000 (softening point 138 ° C), E-4400 (softening point 138 ° C), E-6000S (Softening point 140 ° C.), E-6314 (softening point 138 ° C.) (manufactured by Toho Chemical Industry Co., Ltd.), Meitex PENO, HP-70, HP-600 (manufactured by Meisei Chemical Industry Co., Ltd.), Jongkrill ( (Registered trademark) wax 22 (melting point 81 ° C.), 26J (melting point 138 ° C.), 150 (melting point 104 ° C.) (manufactured by BASF Japan Ltd.), Chemipearl W700 (Mitsui Chemicals) Ltd.) and the like.

  Examples of the polypropylene wax emulsion include Hitech E-433N (softening point 157 ° C.), P-5043 (softening point 157 ° C.), P-5060S (softening point 145 ° C.), P-5300 (softening point 145 ° C.) (above Manufactured by Toho Chemical Industry Co., Ltd.), Petrox P-300, PPEM40 (manufactured by Meisei Chemical Industry Co., Ltd.), Chemipearl WP100 (manufactured by Mitsui Chemicals Co., Ltd.), PE-140-E, PE (manufactured by DIC Corporation) ), PE-20 (manufactured by Shinba Co., Ltd.), Enopole (registered trademark) T, Enopol (registered trademark) M (above, manufactured by Yushi Co., Ltd.), Sun Mariner (registered trademark) S713 (above, Nikka Chemical Co., Ltd.). Of course, it is not limited to these.

  Moreover, the various low molecular weight polyolefin mentioned above can also use one component individually, and can also use multiple types of low molecular weight polyolefin together.

  The method for adhering the low molecular weight polyolefin to the fabric is not particularly limited, but a fabric prepared by dispersing a low molecular weight polyolefin in a dispersion medium such as water (when dyeing, after dyeing the fabric) For example, a method of adhering to the surface by pad dry method, a method of applying by spray, a method of adhering by exhaust method, a method of adhering by mixing in a coating agent, and the like are suitable.

  The low molecular weight olefin according to the present invention is preferably processed into a fiber as a dispersion using water as a dispersion medium. In order to enhance the water dispersibility of the low molecular weight polyolefin, it is preferable to mix in advance with a low molecular weight olefin, for example, a fatty acid salt, a glyceride, a polyhydric alcohol fatty acid ester, a polyamine fatty acid amide, paraffin or the like. By performing such pretreatment, an aqueous dispersion (emulsion) exhibiting good dispersion stability can be prepared. An aqueous dispersion of low molecular weight polyolefin can be easily produced by gradually adding warm water (for example, about 80 ° C. to 100 ° C.) to a low molecular weight polyolefin solution (dispersion) obtained by pretreatment, for example. can do. The aqueous dispersion of low molecular weight polyolefin can also be prepared by emulsifying the low molecular weight polyolefin by sealing the container containing the low molecular weight polyolefin and water and setting the inside of the container at a high temperature of 130 to 135 ° C. .

  The application amount of the low molecular weight polyolefin is preferably 0.01 to 10% by mass and more preferably 0.05 to 3% by mass with respect to 100% by mass of the fabric. On the other hand, when the amount of adhesion exceeds 10% by mass, the antifouling property is lowered or the eyes are apt to be blurred. Moreover, there exists a possibility that the tearing strength improvement effect may become difficult to be exhibited as adhesion amount is less than 0.01 mass%. By adhering a predetermined amount of the low molecular weight polyolefin, in addition to the effect of improving the tearing strength, the texture can be made smooth and soft. Due to this effect, when used as outdoor clothing or a futon side, there is no feeling of roughness and the touch is good.

  The low molecular weight polyolefin may be attached to the woven fabric, for example, an embodiment in which the low molecular weight polyolefin is attached to the surface of the woven fabric; an embodiment in which the low molecular weight polyolefin is attached between the yarns constituting the woven fabric (including the spaces between the monofilaments). The embodiment in which the low molecular weight polyolefin adheres to the tissue point of the fabric; and the like are all preferred embodiments in the present invention.

  Next, the thin fabric according to the present invention will be described in detail.

<Monofilament>
The monofilament used in the present invention is not particularly limited in cross-sectional shape, and a monofilament having a cross-sectional shape such as a round cross-section or an atypical cross-section can be used.

  In particular, monofilaments having a modified cross section have various functions not found in round cross section yarns, but have the disadvantage that dirt easily adheres to the irregular cross-section recesses. However, if low-molecular-weight polyolefin is added to the woven fabric as in the present invention, even if the woven fabric is made of a modified cross-section yarn, it is possible to prevent the adhesion of dirt while taking advantage of the characteristics of the modified cross-section yarn. To do. In the present invention, when a modified cross-sectional yarn is used as the monofilament, a modified cross-sectional yarn having a modified degree of 1.2 to 7 as a value before calendering is preferably used. Monofilaments having a high degree of profile can overlap with each other in a state where there are few voids, thereby reducing the air permeability of the fabric. Further, in this range, since the restraint between the monofilaments becomes strong, the movement of the fabric structure is suppressed even during washing, the low air permeability can be maintained, and the durability is improved.

  The cross-sectional shape of the monofilament is not particularly limited as long as it satisfies the above-mentioned range of degree of irregularity, but preferably has a cross-section including a recess, and the cross-sectional shape is a multi-leaf cross-section such as a Y-shaped cross-section or a cross-shaped cross-section. Various types of irregular cross sections such as a W-shaped cross section, a V-shaped cross section, a U-shaped cross section, and an ∞-shaped cross section can be exemplified. In particular, a multilobal cross section is preferable, and a Y-shaped cross section and a cross section are more preferable. If these monofilaments have a multi-leafed cross section, the convex portions of adjacent fibers will be deeply inserted into the concave portions to lower the air permeability of the fabric and suppress the decrease in the durability of the fabric due to the displacement of the monofilament during washing. Can do.

  The monofilament having a multilobal cross section preferably has a degree of atypicality of 1.5 to 4, more preferably 2 to 3.5, and still more preferably 2.5 to 3.3. If the degree of atypicality is within the above range, it is preferable because air permeability can be lowered, washing durability and antifouling properties can be improved.

  Moreover, it is preferable that the convex part in the said multilobe cross section is comprised so that the front-end | tip part may be the same thickness as a base, or thicker than a base. The shape of the convex part is tapered, and when the tip part is the same thickness as the base part or thicker than the base part, the catching of the uneven part becomes stronger due to the calendering described later, and as a result, the deterioration of the fabric's low breathability is well suppressed even after washing it can.

  In order to obtain a monofilament having a convex part in which the tip part has the same thickness as the base part or thicker than the base part, the present inventors devised the discharge hole shape of the spinneret, and as a result, studied the polymer By making the tip end of the slit thicker than the base in the discharge hole of the die to be extruded, the tip end of the monofilament cross-sectional convex portion becomes thin during cooling and stretching in the quench portion, that is, the taper of the cross-sectional convex portion is solved. It came to. For example, like the nozzle discharge hole 10 shown in FIG. 1, by setting the width b of the tip portion 5 to be larger than the width a of the base 3 of the slit 1 and adjusting the length c of the slit 1 appropriately, the tip portion Has a convex portion that is the same thickness as the base or thicker than the base, and a monofilament that satisfies the above-mentioned degree of variation can be obtained.

  On the other hand, in the present invention, flat cross-sectional yarns such as an array-type cross section, an I-shaped cross section, and a cocoon type can also be preferably used. The flat cross-sectional yarn preferably has a flatness of 3 to 8, more preferably 4 to 7, and still more preferably 4.5 to 6.5. The flat cross-section yarn can finish the monofilament thinly. And since the fabric using the monofilament having such a small fineness and high flatness can suppress irregular reflection of light on the surface of the fabric, the fabric is highly transparent and finished in a thin fabric. Such a woven fabric, for example, can be used for side fabrics such as down jackets and futons, so that the transparency of the side fabrics can be increased to show the filling, so that a product with high designability can be obtained. When the flatness is less than 3, it becomes difficult to increase the transparency of the fabric, and when it exceeds 8, the streaks are easily visible on the surface, and the design of the product may be deteriorated.

  The fineness of the monofilament is not particularly limited, but in order to reduce the air permeability of the fabric and finish the texture softly, the fineness is preferably 0.3 to 2 dtex, more preferably 0.5 to 1 .8 dtex, more preferably 0.7 to 1.5 dtex. If the single yarn fineness is less than 0.3 dtex, there is a possibility that dirt easily adheres to the fabric. In addition, it is difficult to finish the fabric into a thin fabric, and as a result, the transparency of the fabric may be reduced. On the other hand, if the single yarn fineness exceeds 2 dtex, the texture of the fabric becomes hard and it becomes difficult to finish the fabric into a thin fabric.

  The material used for the monofilament is not particularly limited. Polyesters such as polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate or a copolymer thereof; nylon 6, nylon 66, nylon 46, nylon 12, Polyamides such as nylon 610, nylon 612 or copolymers or blends thereof; synthetic polymers such as polyacrylonitrile, polyvinyl chloride, and polyvinyl alcohol; Among these, polyesters and polyamides can be preferably used, and polyamides are particularly preferable because the texture may be soft even if the formed monofilament has a modified cross section.

  When using polyester, the intrinsic viscosity of the material used for the monofilament is preferably 0.58 or more, more preferably 0.6 or more, and preferably 1 or less, 0.9 or less. It is more preferable that By setting the intrinsic viscosity of the material within the above range, a monofilament having an appropriate breaking strength can be obtained, and the production cost can be reduced. In addition, if the intrinsic viscosity of the material is particularly 0.6 or more, a uniform cross-sectional shape can be stably produced when an irregular cross section is used. On the other hand, if the intrinsic viscosity of the material is less than 0.58, the modified cross-section yarn may have a lower breaking strength than the round cross-section yarn. Deterioration of workability due to insufficient elongation at break and deterioration of product durability are likely to occur. On the other hand, if the intrinsic viscosity of the raw material exceeds 1, the production of the monofilament requires a great deal of cost, which is not practical.

  For example, in the case of nylon, the relative viscosity of the material used for the monofilament is preferably 1.5 or more, and more preferably 2 or more. If the relative viscosity of the material is 1.5 or more, the resulting monofilament has an appropriate breaking strength. Moreover, if the relative viscosity of the raw material is 3 or more, the uneven portion can be clearly manifested in the case of using a modified cross-section yarn. On the other hand, if the relative viscosity of the material is less than 4, the modified cross-section yarn may have a lower breaking strength than the round cross-section yarn, resulting in a product having a tear strength insufficient, a reduction in breaking strength, and a lack of elongation at break. Problems such as deterioration in processing operability and product durability are likely to occur. In addition, in the case of a modified cross-section yarn, if the relative viscosity of the material is less than 4, the uneven portion does not clearly appear and a triangular cross-sectional shape is not preferable.

  Moreover, a hygroscopic substance, an antioxidant, a matting agent, an ultraviolet absorber, an antibacterial agent, or the like may be added to the monofilament as necessary, alone or in combination.

  In the present invention, among the monofilaments described above, monofilaments having the same characteristics can be used alone, or a plurality of types of monofilaments can be mixed and used.

<Synthetic multifilament>
Next, the synthetic multifilament used in the present invention will be specifically described. The synthetic multifilament used in the present invention is a fiber in which a plurality of fibers including the monofilament described above are bundled.

  The fineness of the synthetic multifilament is 5 to 40 dtex, preferably 9 to 35 dtex, more preferably 10 to 26 dtex. When it exceeds 40 dtex, the yarn becomes thick, and when it is made into a woven fabric, the woven fabric becomes thick and hard, making it difficult to finish the woven fabric into a thin fabric. Moreover, if the fineness of the synthetic multifilament is less than 5 dtex, it becomes difficult to achieve both the tear strength and the air permeability of the fabric. Since the tear strength of the woven fabric is increased by the processing of the low molecular weight polyolefin, the present invention is a woven fabric having a relatively low tear strength formed from a polyester fiber (fiber made from the polyester) of 40 dtex or less, or a polyamide-based fabric. Fibers (fibers made from the above polyamides) are particularly effective for woven fabrics having a low tear strength formed from fibers of 20 dtex or less.

  A monofilament other than the monofilament described above may be used for one synthetic multifilament. In this case, the amount of the monofilament is preferably blended at least 80% by mass or more in 100% by mass of one synthetic multifilament, more preferably 90% by mass or more, and still more preferably 95% by mass or more. And most preferably 100% by weight.

  The number of monofilaments constituting one synthetic multifilament can be appropriately selected according to the relationship between the fineness (total fineness) of the synthetic multifilament and the fineness of the monofilament. For example, the number is preferably 2 or more. More preferably, it is 5 or more, preferably 35 or less, more preferably 30 or less, still more preferably 25 or less, and the fabric is finished to a lighter background. In some cases, the number is preferably 15 or less. If the number of monofilaments is within the above range, when a certain force is applied to the woven fabric, the stress against this force is not concentrated on one monofilament, but is dispersed in a plurality of monofilaments. Thereby, since the stress concerning one monofilament can be reduced, tearing strength improves.

  The higher the breaking strength, the more suitable the synthetic multifilament is for lightweight and thin fabrics for clothing and bedding. The breaking strength of the synthetic multifilament is, for example, preferably 2.7 cN / dtex or more, more preferably 3 cN / dtex or more, still more preferably 3.3 cN / dtex or more, and particularly preferably 3.5 cN. / Dtex or more. If the strength of the synthetic multifilament is 2.7 cN / dtex or more, a woven fabric having an appropriate tear strength can be obtained even in a multifilament composed of monofilaments having a high degree of variation. Further, the upper limit of the breaking strength of the synthetic multifilament is not particularly limited, but it is usually 7 cN / dtex or less, 6.5 cN / dtex or less, and even 6 cN / dtex or less. Sufficient strength can be given.

  The synthetic multifilament desirably has a predetermined breaking elongation. When the breaking elongation of the synthetic multifilament is increased, the stress applied to the fabric when the fabric is torn is distributed to a plurality of yarns without being concentrated on one yarn to be torn. And as a result, since the stress applied per yarn is reduced, the effect of improving the tearing strength of the fabric is exhibited.

  Specifically, the breaking elongation of the synthetic multifilament is, for example, preferably 20% or more, more preferably 28% or more, still more preferably 35% or more, and 55% or less. Preferably, it is 50% or less, more preferably 48% or less. When the breaking elongation of the synthetic multifilament is lower than 20%, the stress applied when the fabric is torn is likely to concentrate on one yarn to be torn, and the tear strength of the fabric may be reduced. . Moreover, when the breaking elongation of the synthetic filament is higher than 55%, the original yarn is fully stretched due to the strong tension due to the frictional resistance with various yarn-contacting parts as the weaving speed increases and the density increases. The frequency of occurrence is likely to increase. Further, when the raw yarn is stretched, the breaking strength is also lowered, and there is a problem that the tearing strength when it is made into a woven fabric is lowered.

  Moreover, the boiling water shrinkage rate, thermal stress, birefringence, thickness unevenness, etc. of the synthetic multifilament are not particularly limited. It may be crimped such as false twisting or may be a composite yarn.

  A method for producing a synthetic multifilament is not particularly limited. For example, a polyamide multifilament or a polyester multifilament is performed in two steps by using a spin-drawing continuous spinning apparatus or a spinning apparatus and a stretching apparatus. Can be manufactured. For example, in the case of the spin draw method, the speed of the spinning take-up godet roller may be set to 1500 m / min to 4000 m / min.

<Textile>
The woven fabric of the present invention includes the above-described synthetic multifilament, and the synthetic multifilament is desirably used in a proportion of 50% by mass or more in 100% by mass of the woven fabric. The amount of the synthetic multifilament used is preferably as large as possible. Specifically, the synthetic multifilament described above is preferably used in an amount of 70% by mass or more, more preferably 90% by mass or more in 100% by mass of the fabric. More preferably, it is 98 mass% or more, and most preferably 100 mass%. By increasing the amount of the synthetic multifilament having a finer fineness as described above, the woven fabric can be finished to a thinner ground.

  The woven structure of the woven fabric is not particularly limited, and any structure such as a plain structure, a twill structure, and a satin structure can be used. This is because, when a woven fabric is prepared with these structures and then the processed woven fabric is processed with the low molecular weight polyolefin described above, the tear strength of the woven fabric is improved by about 10 to 70%.

  In the present invention, a woven structure such as a ripstop taffeta or a double lip can also be preferably employed. The ripstop taffeta can be woven, for example, by creating a flat structure with thin threads and arranging thick threads in a lattice pattern. When low molecular weight polyolefin is adhered to a woven fabric woven with these woven structures, it is possible to improve the tear strength while improving the antifouling property of the woven fabric. That is, it is considered that the high-density plain structure is a woven fabric having a very large number of texture points, but by attaching a low molecular weight polyolefin to the texture points, the slippage between the threads is improved.

  The ripstop taffeta is generally woven by arranging two to three ground yarns on warp and / or weft. However, in the present invention, in order to increase the tearing strength of the woven fabric, as a yarn arranged at the time of weaving, instead of arranging two to three ground yarns, weaving may be performed using a single thicker yarn. Alternatively, high strength fibers such as high strength polyethylene and aramid may be arranged and woven.

  In addition, the loom used for manufacturing the fabric is not particularly limited, and various looms such as a water jet loom loom, an air jet loom loom, and a rapier loom loom may be appropriately used.

  The warp density of the woven fabric is preferably 140 to 380 yarns / inch, and more preferably 170 to 260 yarns / inch. The weft density of the woven fabric is preferably 90 to 350 yarns / inch, and more preferably 120 to 250 yarns / inch. The green machine density and the finishing density may be the same or different.

The cover factor (CF) of the obtained woven fabric is preferably 1200 to 2500, more preferably 1500 to 2100. By setting the cover factor of the woven fabric within the above range, a woven fabric having a light and thin fabric and low air permeability can be obtained. When the cover factor of the fabric is smaller than 1200, a thin and light fabric can be obtained, but it is difficult to satisfy the low air permeability. On the other hand, if it exceeds 2500, the woven fabric tends to be heavy although low air permeability is satisfied.
Here, the fabric cover factor (CF) is calculated by the following equation.
CF = T × (DT) ^1/2 + W × (DW) ^1/2
[In the formula, T and W indicate the warp density and weft density (inch / inch) of the woven fabric, and DT and DW indicate the thickness (dtex) of the warp and the weft yarn constituting the woven fabric]

  The woven fabric may be subjected to finishing processing such as scouring, relaxing, presetting and dyeing using a general thin fabric processing machine.

<Calendar processing>
At the time of finishing, in the present invention, it is more preferable to perform calendering on at least one side of the fabric as necessary. As described above, by processing the low molecular weight polyolefin in the woven fabric, it becomes difficult for dirt to adhere to the woven fabric, and the antifouling property of the woven fabric is improved. However, the dirt adhering to the fabric tends to remain in the gaps where monofilaments and synthetic multifilaments overlap even after washing. In particular, when a monofilament having a high degree of profile is blended with a synthetic multifilament, dirt remains in the cross-sectional recesses of the irregular cross-section yarn.

  However, when calendering is applied to the fabric, at least part of the overlapping gaps of monofilaments and synthetic multifilaments can be compressed and closely adhered in an overlapping state, so that the remaining dirt after washing between the yarns is greatly increased. Can be reduced. Moreover, even if it is an irregular cross-section thread | yarn, since it becomes the structure where at least one part of the cross-sectional recessed part was compressed by the calendar process, the dirt which remains in a cross-sectional recessed part can also be reduced. Furthermore, since calendering can prevent displacement between monofilaments, the low air permeability of the fabric can be maintained over a long period of time. In addition, the calendering has a further advantage that the fabric can be softly finished because the monofilament cross-sections are aligned and overlapped.

  The calendering can be performed either before or after the low molecular weight polyolefin described above. In the present invention, in particular, in order to further enhance the effect of calendering, it is preferable to carry out calendering after applying a low molecular weight polyolefin.

  The calendering may be performed only on one side of the fabric or on both sides. However, when calendering is applied to both sides, the surface of the fabric surface becomes unfavorable glossy, the texture becomes harder, and the fabric becomes sticky to the skin when it becomes wet due to poor skin separation. Since such an unpleasant feeling may be caused, when such a texture is not preferred, it is preferably applied only to one side. In addition, the number of calendering operations is not particularly limited, and may be performed only once or multiple times as long as the monofilaments can be closely overlapped with each other so as to spread on the side of the fabric surface. 1 to 2 times (preferably twice).

  The calendering temperature is not particularly limited, but is preferably 50 ° C or higher than the glass transition temperature of the material used, more preferably 80 ° C or higher, preferably 20 ° C or higher than the melting point of the material used, and 30 ° C or higher. More preferably, it is low. By adjusting the calendering temperature within the above range, a woven fabric capable of maintaining both low air permeability and high tear strength can be obtained. On the other hand, if the calendering temperature is lower than a temperature higher by 50 ° C. than the glass transition temperature of the material used, the degree of compression of the monofilament is weak and it becomes difficult to obtain a woven fabric having a low air permeability. On the other hand, if the melting point of the material used is higher than −20 ° C., the degree of compression of the monofilament is increased, but the tear strength of the fabric may be significantly reduced. For example, when polyamide is used as a raw material, the calendering temperature is preferably 130 ° C to 200 ° C, and more preferably 140 ° C to 190 ° C. Moreover, when using polyester as a raw material, it is preferable that the temperature of a calendar process is 160 to 240 degreeC.

The calendering pressure is preferably 0.98 MPa (10 kgf / cm ² ) or more, more preferably 1.96 MPa (20 kgf / cm ² ) or more, and 5.88 MPa (60 kgf / cm ² ) or less. Preferably, the pressure is 4.9 MPa (50 kgf / cm ² ) or less. By adjusting the calendering pressure within the above range, the fabric can exhibit low air permeability and improved tear strength. On the other hand, if the calendering pressure is less than 0.98 MPa (10 kgf / cm ² ), the degree of compression of the monofilament is so weak that a fabric having a low air permeability may not be obtained. On the other hand, if it is greater than 5.88 MPa (60 kgf / cm ² ), the monofilament is excessively compressed, and the tear strength of the fabric may be significantly reduced.

  The material of the calendar roll is not particularly limited, but one roll is preferably made of metal. If it is a metal roll, the temperature of the roll itself can be adjusted, and the surface of the dough can be uniformly compressed. The material of the other roll is not particularly limited, but is preferably made of metal or resin. In the case of resin, nylon is preferable.

<Other processing>
Even if it is softened with other finishes such as amino-modified silicone, polyester-based, hydrocarbon wax (mineral wax, petroleum-based wax, animal and vegetable wax, etc.) to the extent that the effects of the present invention are not impaired. Good. Furthermore, examples of the resin processing agent used for resin processing include various resins such as melamine resin, glyoxal resin, urethane-based, acrylic-based, and polyester-based resins.

  Moreover, you may implement various processes, such as a coating process and a lamination process, as needed. Furthermore, for fabrics, functional processing agents include, for example, antistatic agents; antibacterial agents; silicone-based water repellents, fluorine-based water repellents made of polymers having perfluoroalkyl groups, paraffin-based water repellents, etc. A water repellent; etc. can also be provided.

  In addition, in this invention, when water-repellent and oil-repellent finishing is used together, it is preferable because re-contamination can be further improved. The water / oil repellent process is a process that makes it easy to repel water and oil on the surface of the fabric and makes it difficult to adhere dirt. However, once the dirt adheres to the fabric, it cannot be easily removed by washing. In addition, since water-repellent / oil-repellent processing tends to make the fabric feel harder, silicone softeners have also been used in water / oil-repellent processing. When used, there is also a problem that dirt is likely to remain, probably because of its familiarity with the silicone system. However, as in the present invention, when processing with low molecular weight polyethylene is performed for water and oil repellency processing, dirt can be easily removed by washing even when water and oil repellency processing is performed. This is preferable because it is possible to eliminate such problems and to further prevent dirt from adhering to the fabric.

<Characteristic>
In the present invention, by attaching the low molecular weight polyolefin to the woven fabric, the tear strength is increased by 10 to 70% compared to the woven fabric not processed. The tear strength of the fabric by the pendulum method is not necessarily limited, but is preferably 8 to 50 N in both the warp direction and the weft direction from the required performance as a side for clothing and feather products (more Preferably it is 10-45N, More preferably, it is 12-40N). By adjusting the tear strength of the fabric to the above range, a lightweight and thin fabric having a tear strength that can withstand practical use such as sports clothing and a futon side fabric can be obtained. When the tear strength is less than 8N, the tear strength of the fabric may be insufficient depending on the application, and in some cases, the fabric may be broken. In order to impart a high tear strength exceeding 50 N, the fineness of the filament may be increased. However, if the fineness of the filament is increased, the dough becomes thicker and harder. Moreover, it is not preferable because the production cost increases.

  Since the woven fabric according to the present invention has low molecular weight polyolefin adhered to the woven fabric, the dirt adhered to the woven fabric can be easily removed by washing. Moreover, since the stain | pollution | contamination component which floats in a washing | cleaning liquid can prevent reattaching to a textile fabric, it is excellent in antifouling property. The antifouling performance of the woven fabric is preferably grade 3 or higher (more preferably grade 4 to 5) in the diamond paste method. Moreover, it is preferable that washing | cleaning recontamination property becomes a 3rd grade or more (more preferably it is a 4th-5th grade). The diamond paste method and washing recontamination property will be described in detail in the Examples section.

Air permeability by Frazier method fabric, an initial value before washing, is preferably not more than 1.5cc / cm ² / s, more preferably not more than 1cc / cm ² / s, more preferably 0 .85 cc / cm ² / s or less. The lower limit of the air permeability is not limited, but it is difficult to adjust the pressure in the garment without a certain air permeability. Therefore, the air permeability of the fabric is 0 before washing. is preferably .3cc / cm ² / s or more, more preferably more than 0.5cc / cm ² / s, further preferably 0.7cc / cm ² / s or more. When the air permeability before washing is within the above range, when the fabric according to the present invention is used for a down jacket, a side of a duvet, etc., a down-proof property can be achieved at a high level.

The fabric weight is 15 to 70 g / m ² , and more preferably ²⁰ to 65 g / m ² . In the case of finishing a thinner fabric, 20 to 45 g / m ² is particularly preferable. Moreover, when giving priority to the tear strength of a textile fabric, 45-65 g / m < ² > is especially preferable. By setting the basis weight of the obtained woven fabric within the above range, a woven fabric having a light weight and low air permeability that is suitably used for each application described later can be obtained. On the other hand, when the fabric weight is less than 15 g / m ² , the fabric is thin and light, but a fabric having low air permeability cannot be obtained. On the other hand, if it exceeds 70 g / m ² , a fabric with low air permeability can be obtained, but it becomes a thick fabric and it may be difficult to lightly finish the fabric.

  Moreover, it is preferable that the thickness of a textile fabric is 0.001-0.1 mm, for example, More preferably, it is 0.005-0.08 mm, More preferably, it is 0.01-0.06 mm. A thinner woven fabric is preferable because the woven fabric becomes thinner.

  The woven fabric of the present invention can be used, for example, as a side clothing for sports clothing such as a down jacket or a futon. The fabric of the present invention is characterized by being less dirty, lighter in weight, having a higher tearing strength, and having a smoother and softer texture than conventional sports clothing or futon side. Furthermore, since the air permeability of the fabric is low, it has a good down-proof property.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited by the following examples, but may be appropriately modified within a range that can meet the purpose described above and below. Of course, it is possible to implement them, and they are all included in the technical scope of the present invention.

  Each evaluation method used in the examples is as follows.

<Relative viscosity>
A sample solution was prepared by dissolving the sample in 96.3 ± 0.1% by mass of reagent-grade concentrated sulfuric acid so that the polymer concentration was 10 mg / ml. Using an Ostwald viscometer with a temperature of 20 ° C. ± 0.05 ° C. and a water fall time of 6 to 7 seconds, a drop time T ₁ (second) of 20 ml of the prepared sample solution at a temperature of 20 ° C. ± 0.05 ° C. The drop time T ₀ (seconds) of 20 ml of the reagent grade concentrated sulfuric acid of 96.3 ± 0.1% by mass used for dissolving the sample was measured. The relative viscosity (RV) of the material used was calculated by the following formula.
RV = T ₁ / T ₀

<Intrinsic viscosity>
Intrinsic viscosity (IV) is determined by using a mixed solvent composed of p-chlorophenol and tetrachloroethane (p-chlorophenol / tetrachloroethane = 75/25), measured at 30 ° C. It is converted into the intrinsic viscosity (IV) of a mixed solvent consisting of phenol and tetrachloroethane (phenol / tetrachloroethane = 60/40) according to the formula.
IV = 0.8325 × [η] +0.005

<Viscosity average molecular weight>
The viscosity average molecular weight of the low molecular weight polyolefin was determined by the method shown below.
First, 20 mL of trichlorobenzene (TCB) Fisher HPLC grade was charged into a container, 10 mg of low molecular weight polyolefin was added thereto, and the mixture was stirred at 150 ° C. for 2 hours to dissolve the low molecular weight polyolefin. At this time, 0.1% by mass of dibutylhydroxytoluene (BHT) was added to TCB to prevent oxidation. Using the obtained solution as a sample, the drop time (t _s ) of the solution between the marked lines was measured using a Ubbelohde viscometer in a thermostat set at 135 ° C.
Next, the same measurement was performed on a sample in which 5 mg of low molecular weight polyolefin was dissolved in 20 mL of TCB.
And as a blank was measured when only TCB not dissolve the low molecular weight polyolefin solution was used as a sample, a solution falling time (t _b). The drop time was measured three times and an average value was adopted.
Using the measured t _s and t _b , the specific viscosity η _sp of the low molecular weight polyolefin was determined according to the following formula.
η _sp = (t _s / t _b −1)
Next, the reduced viscosity η _sp / C is obtained by dividing the obtained specific viscosity η _sp of the low molecular weight polyolefin by the sample concentration C (w / v%) of the low molecular weight polyolefin, and the horizontal axis represents the sample concentration of the low molecular weight polyolefin. A linear function was determined by plotting C (w / v%) and reduced viscosity η _sp / C on the vertical axis. The value of the intercept (concentration 0 w / v%) of the drawn graph was defined as the intrinsic viscosity η.
Using the determined intrinsic viscosity η, the viscosity average molecular weight Mv was determined according to the following formula (Mark-Kuhn-Houwink formula).
Mv = 5.34 × 10 ⁴ η ^1.49

<Acid value>
The acid value of the low molecular weight polyolefin was determined according to JIS K0070-1992.

<Fineness>
The fineness (total fineness) of the multifilament was obtained by preparing three 100-m long multifilament caskets, measuring each mass (g), obtaining an average value, and multiplying by 100. The fineness of the monofilament was obtained by dividing the fineness of the multifilament by the number of filaments.

<Atypical degree>
Using a VH-Z450 type microscope and a VH-6300 type measuring instrument (manufactured by KEYENCE), a cross-sectional photograph of the cross section of the monofilament perpendicular to the fiber axis direction was taken at a magnification of 1000 times by the embedding method. From the photograph of the cross section, the long diameter (longest diameter) and the vertical diameter (long diameter and vertical diameter) of the cross section of the monofilament were measured, and the long diameter / vertical diameter of the cross section of the monofilament constituting the fabric was calculated. The average value of the three was taken as the degree of monofilament irregularity.

<Flatness>
Using a VH-Z450 type microscope and a VH-6300 type measuring instrument (manufactured by KEYENCE), a cross-sectional photograph of the cross section of the monofilament perpendicular to the fiber axis direction was taken at a magnification of 1000 times by the embedding method. From the cross-sectional photograph, the major axis (diameter of the longest part) and the minor axis (diameter of the shortest part) of the cross section of the monofilament were measured, and the major axis / minor axis of the cross section of the monofilament constituting the fabric was calculated. The average value of the three was taken as the flatness of the monofilament.

<Breaking strength / breaking elongation>
Using a 4301 type universal material testing machine manufactured by Instron Japan, applying a load (gf) of 1/33 to the total fineness (dtex) of the multifilament, a multifilament sample length (yarn length) of 20 cm, and a tensile speed An SS chart was prepared under the condition of 20 cm / min. One sample was measured three times, and the values of breaking strength and breaking elongation were read from each chart. The obtained values were averaged to determine the breaking strength and breaking elongation.

<Cover factor>
The cover factor (CF) of the woven fabric was calculated by the following formula.
CF = T × (DT) ^1/2 + W × (DW) ^1/2
[In the formula, T and W represent warp density and weft density (2.54 cm / line), and DT and DW represent warp and weft thickness (dtex) constituting the fabric.

<Diamond paste (antifouling property)>
The antifouling property of the fabric was evaluated in accordance with the Japan Chemical Fiber Association standard “JCFA TM-104 diamond paste method”. That is, a test piece (an unwashed sample or a sample after 10 washes) was spread on a filter paper laid horizontally, 0.1 mL of the following soil component was adhered to the test piece, and left at room temperature for 1 hour.
Dirt component;
Carbon black; 0.167 parts by mass Liquid paraffin: 0.625 parts by mass Tallow hardened oil: 0.208 parts by mass Motor oil (manufactured by Shell): 100 parts by mass

Next, this test piece was washed once by the following washing method, and the state of the stain remaining on the test piece was determined by a gray scale for contamination (JIS L 0805, 2005). The judgment result is the result of “Diamond Paste Initial”.
Moreover, after making the stain | pollution | contamination component adhere to the test piece wash | cleaned 10 times by the following test method similarly to the initial stage, it wash | cleaned once more, and the state of the stain which remains on a test piece was determined. The determination result is a result of “diamond paste after 10 washes”.

<How to wash>
According to JIS L 0217 103 method. Wash for 15 minutes using a 2-tank electric washing machine (bath ratio 1:30, liquid temperature 40 ° C., amount of detergent 25 g against hot water 30 L (“Attack (registered trademark)” manufactured by Kao Corporation), rinse twice After the dehydration, the suspension was dried and dried.

<Laundry recontamination test>
A sample (5 cm × 10 cm) is put in a washing liquid composed of the following components and treated under the conditions of JIS-L-0844 A-1. After carrying out water washing and air drying, 1-5 grade judgment was implemented according to the gray scale for pollution (JIS L 0805). The judgment result is the result of “initial stage of washing re-contamination”.
In addition, the test piece laundered 10 times by the above test method is put into a washing liquid composed of the following components in the same manner as in the initial stage, treated under the conditions of JIS-L-0844 A-1, and recontaminated. Sex was judged. The determination result is a result of “washing recontamination property after 10 times of washing”.
Laundry liquid component (carbon black 1 mass% aqueous solution having the following components);
Carbon black: 1 part by mass Tallow fatty acid: 15 parts by mass Soap (JIS K3302-U): 10 parts by mass 74 parts by mass of water

<Air permeability>
The air permeability of the woven fabric was measured according to the air permeability A method (Fragile form method) defined in JIS L 1096 8.27.1. The fabric used as a sample was the one before washing.

<Tearing strength>
The tear strength of the woven fabric was measured in both warp and warp directions in accordance with the tear strength D method (penjuram method) defined in JIS L 1096 8.15.5.

<Unit weight>
The basis weight was measured based on “mass per unit area in the standard state of the fabric” defined in JIS L 1096 8.4.

<Thickness>
The thickness of the fabric was measured according to the thickness of the fabric defined in JIS L 1096 8.5.1.

<Texture (softness)>
The texture of the fabric was selected randomly by 5 evaluators and sensory evaluation when touching the fabric (1 point: hard, 2 points: slightly hard, 3 points: neither can be said, 4 points: slightly soft, 5 The points obtained were averaged.

Example 1
<Preparation of aqueous dispersion of low molecular weight polyethylene>
In an autoclave having an internal volume of 2 L equipped with a stirrer, maleic anhydride-modified polyethylene (“High Wax 2203A” manufactured by Mitsui Chemicals, viscosity average molecular weight 2700, acid value 30 mg KOH / g, modified amount 2.49 mass%, melting point 107 ° C. ) To 100 parts by mass, 500 parts by mass of toluene was added and stirred at 125 ° C. for 1 hour to dissolve the maleic anhydride-modified polyethylene, and then cooled to 90 ° C. to prepare a maleic anhydride-modified polyethylene-containing toluene solution. did.
Next, 10 parts by mass of potassium oleate, 3 parts by mass of potassium hydroxide, and 600 parts by mass of water were charged into a 2 L internal volume autoclave equipped with a different stirrer, and the aqueous solution was heated to 90 ° C. while stirring. did. The maleic anhydride modified polyethylene containing toluene solution was added there in the state which continued stirring.
After stirring for 2 hours, the mixture was dispersed for 10 minutes at 10,000 rpm using a high-speed homogenizer (“HG-92 type” manufactured by SMT Corporation).
Further, with the stirring continued, the condensed water was refluxed and steam distilled for 2 hours to distill off the toluene to obtain an aqueous dispersion of low molecular weight polyethylene (concentration 16%, average particle size of finely dispersed particles of 0.1%). 4 μm).
<Production of woven fabric>
A nylon 6 polymer having a relative viscosity of 2.2 containing 0.4% by mass of titanium oxide was melt-spun by a conventional method to obtain a multifilament having a total fineness of 22 dtex and comprising 20 monofilaments having a round cross section. Table 1 shows the breaking strength and breaking elongation of the obtained multifilament. The degree of variant of the monofilament was 1.
The produced multifilament was used for warp and weft, the green density was set to 160 / inch for both warp and weft, and weaved in a plain structure. Table 1 shows the characteristics of the obtained dough.
The obtained dough is refined using an open soaper according to a conventional method, preset at 190 ° C. for 30 seconds using a pin tenter, and blue with an acid dye using a liquid dyeing machine (“Circular NS” manufactured by Nisaka Seisakusho). And then dried.
<Production of antifouling thin fabric>
A low molecular weight polyethylene aqueous dispersion (polyethylene solid content concentration 16%) prepared by the above-described method was added to a dyed woven fabric with 2% soln. The formulation solution was adjusted so that the wet pick-up was adjusted to 50% by the pad dry method, the low molecular weight polyethylene was applied, dried, and then heat set at 170 ° C. for 30 seconds. .
Next, calendering (processing conditions: cylinder processing, temperature 150 ° C., pressure 2.45 MPa (25 kgf / cm ² ), speed 20 m / min) was performed twice on one side of the fabric. About the obtained textile fabric, antifouling property, washing re-contamination property, air permeability, tear strength, basis weight, thickness, softness and the like were evaluated by the above methods. The results are shown in Table 1.

Example 2
Using a nylon 6 polymer chip containing no titanium oxide and a relative viscosity of 2.2 ("Super Bright" manufactured by Toyobo Co., Ltd.) as a raw material, and using a polymer chip whose relative viscosity is increased to 3.5 by solid phase polymerization Then, melt spinning and stretching were carried out by a conventional method to obtain a multifilament having a fineness of 11 dtex, consisting of seven monofilaments having a round cross section. The degree of variant of the monofilament was 1.
Next, the multifilament was used for weaving with the mini-lip structure (ripstop taffeta structure) shown in FIG. The obtained fabric was scoured, heat set and dyed in the same manner as in Example 1.
Thereafter, a fluorine-based oil repellent antifouling agent ("Asahi Guard (registered trademark) AG780" manufactured by Asahi Glass Co., Ltd.) 2% soln. And a low molecular weight polyethylene aqueous dispersion of Example 1 (polyethylene solid content concentration 16%) was dissolved in 2% soln. The prescription liquid was adjusted so that the wet pick-up was adjusted to 50% by the pad dry method, and the mangle pressure was applied, dried and heat set, and then finished by calendering on one side. Table 1 shows the evaluation results of the obtained woven fabric.

Example 3
Using the nylon 6 polymer chip having a relative viscosity of 3.5 used in Example 2, the Y-shaped discharge hole shape (slit root width a: 0.07 mm, slit tip width b: 0. 11 mm, slit length c: 0.465 mm), and using a spinneret having 24 holes, melt spinning under normal conditions, consisting of 24 monofilaments with a Y-shaped cross section and having a fineness of 33 dtex A multifilament was obtained.
The multifilament was used for warp and weft and woven with a ripstop taffeta structure.
Thereafter, in the same manner as in Example 1, scouring, presetting, dyeing, finishing, and calendaring were performed.

Example 4
A polyethylene terephthalate (PET) polymer chip (manufactured by Toyobo Co., Ltd.) having an intrinsic viscosity of 0.62 was obtained by solid-phase polymerization to increase the intrinsic viscosity to 0.75 and further adding 0.01% of titanium oxide. Using a polymer chip, melt spinning and drawing were carried out by a conventional method to obtain a multifilament having a total fineness of 16 dtex composed of 24 monofilaments having a round cross section.
The multifilament was used for warp and weft and woven with a ripstop taffeta structure.
Thereafter, in the same manner as in Example 1, scouring, presetting, dyeing, finishing, and calendaring were performed.

Example 5
The nylon 6 polymer chip having a relative viscosity of 3.5 used in Example 2 was melt-spun from a spinneret having 24 I-shaped discharge holes. Of the three godet rollers, the speed of the first godet roller is set to 2700 m / min, the speed of the second godet roller is set to 3450 m / min, the speed of the third godet roller is set to 3500 m / min, and the stretching temperature of the second godet roller is 153 ° C. The film was stretched at a stretching temperature of 133 ° C. A multifilament having a fineness of 33 dtex and comprising 24 monofilaments having a flatness of 5 and an I-shaped cross section was obtained.
The multifilament was used for warp and weft and woven with a ripstop taffeta structure.
Thereafter, in the same manner as in Example 1, scouring, presetting, dyeing, finishing, and calendaring were performed.

Example 6
“High wax 2203A” used in the preparation of an aqueous dispersion of low molecular weight polyethylene is a low molecular weight polyethylene wax emulsion (“Chemipearl (registered trademark) W700” manufactured by Mitsui Chemicals, Ltd.), average particle size measured by Coulter counter method Diameter 1 μm) and oxidized polyethylene wax emulsion (“Permarin KUE4” manufactured by Sanyo Chemical Industries, average particle diameter 60 nm), each concentration being 1% soln. A woven fabric was produced in the same manner as in Example 1 except that an aqueous dispersion of low molecular weight polyethylene was prepared in the same manner as in Example 1 except that the amount was adjusted so as to be. Table 1 shows the evaluation results of the obtained woven fabric.

Comparative Example 1
A woven fabric was woven in the same manner as in Example 1, and after scouring, presetting and dyeing, a silicone softener ("DM-100E" manufactured by Nikka Chemical Co., Ltd.) 2% soln. The treatment liquid prepared in (1) was applied by adjusting the mangle pressure so that the wet pickup would be 50% by the pad dry method, heat-set at 170 ° C., and then calendered.

Comparative Example 2
A woven fabric was woven in the same manner as in Example 3, and after scouring, presetting and dyeing, a silicone softener ("DM-100E" manufactured by Nikka Chemical Co., Ltd.) 2% soln. The treatment liquid prepared in (1) was applied by adjusting the mangle pressure so that the wet pickup would be 50% by the pad dry method, heat-set at 170 ° C., and then calendered.

Reference example 1
A woven fabric was produced in the same manner as in Example 1 except that the calendar treatment was not performed.

  As shown in Examples 1 to 6, the woven fabric to which the low molecular weight polyolefin was adhered was more easily cleaned by washing than the fabrics of Comparative Examples 1 and 2 to which the low molecular weight polyolefin was not applied. You can see that In addition, it is possible to prevent the dirt component contained in the washing liquid from reattaching.

  Further, as is clear from the comparison between Example 1 and Comparative Example 1, by attaching low molecular weight polyolefin to the fabric, the tear strength of the fabric is 13N to 15N (15.4% increase) in the warp direction, the weft direction It can be seen that both are improved from 11N to 12N (9% increase).

  Further, when Example 3 and Comparative Example 2 are compared, it can be seen that the effect of improving the antifouling property by attaching the low molecular weight polyolefin is sufficiently exhibited even with the irregular cross-section yarn.

  Moreover, although Example 1 and Reference Example 1 differ in the point of the presence or absence of calendering, when calendering is performed, the fiber gap becomes denser and dirt can be prevented from entering the fiber gap. Therefore, since the dirt of the fabric mainly adheres only to the surface, it can be easily removed by washing, and further, the redeposition of dirt during washing can be prevented.

  The fabric of the present invention is a fabric that is lightweight and thin, yet has excellent tear strength and antifouling properties, and is suitably used for outdoor apparel use and futon side use.

  1: slit, 3: root, 5: tip, 10: base discharge hole

Claims (5)

A woven fabric containing a synthetic multifilament having a fineness of 5 to 40 dtex,
The fabric weight is 15 to 70 g / m ² , tear strength is 8 to 50 N, and air permeability is 0.3 to 1.5 cc / cm ² · sec.
A thin woven fabric characterized in that a low molecular weight polyolefin having a viscosity average molecular weight Mv of 500 to 20,000 is adhered to the woven fabric.   The thin fabric according to claim 1, wherein the low-molecular-weight polyolefin is oxidized polyethylene and / or acid-modified polyethylene having a viscosity average molecular weight Mv of 1,000 to 7,000.   The thin woven fabric according to claim 1 or 2, wherein the monofilament constituting the synthetic multifilament has a multi-leafed cross section having an irregularity of 1.5 to 4.   The thin fabric according to claim 1 or 2, wherein the monofilament constituting the synthetic multifilament has a flat cross section having a flatness of 3 to 8.   The thin fabric according to any one of claims 1 to 4, wherein at least one surface of the thin fabric is calendered.

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