WO2008056406A1

WO2008056406A1 - High-density woven fabric and production process

Info

Publication number: WO2008056406A1
Application number: PCT/JP2006/322137
Authority: WO
Inventors: Toshiaki Shimizu; Hiroshi Suyama; Masashi Okuda
Original assignee: Toray Industries, Inc.
Priority date: 2006-11-07
Filing date: 2006-11-07
Publication date: 2008-05-15

Abstract

A high-density woven fabric having excellent wind breaking properties which is a woven fabric comprising, as the warps and/or the wefts, polytrimethylene terephthalate multifilaments having a single-fiber fineness of 0.01-0.5 dtex, characterized in that the total cover factor of the warps and wefts is 1,700-3,500 and the air permeability is less than 1.0 cc/cm2·s. This high-density woven fabric can be obtained by weaving a fabric out of sea-island type composite fibers in which the sea-component polymer is constituted of polylactic acid and the island-component polymer is constituted of polytrimethylene terephthalate and then subjecting the woven fabric to a dissolution treatment to dissolve away the polylactic acid.

Description

Specification

High density fabric and manufacturing method

Technical field

TECHNICAL FIELD [0001] The present invention relates to a high-density woven fabric excellent in windproof property, ie, polytrimethylene terephthalate ultrafine yarn force, and a method for producing the same. More specifically, a high-density fabric having excellent windproof properties obtained by using a sea-island type composite fiber composed of polylactic acid and polytrimethylene terephthalate, which can produce polytrimethylene terephthalate ultrafine yarn by dissolution treatment, and It relates to the manufacturing method.

Background art

Hitherto, high density fabrics using fiber yarns made of polyethylene terephthalate have been widely used as sports fabrics having windproof and water repellency. However, in order to obtain sufficient windproof and water repellency, it is necessary to increase the density, so if weaving with a normal yarn made of polyethylene terephthalate and increasing the fabric density during weaving, weaving The resulting woven fabric was hard and textured due to high densification. In addition, when the thermal shrinkage rate of the raw yarn used to solve the problem of weaving due to this high densification is increased, the raw machinery density can be lowered, but the yarn shrinkage is high. The fabric was very paper-like and the texture was hard.

[0003] As means for improving the hardness of these textures, high-density fabrics using fiber yarns made of polytrimethylene terephthalate having a Young's modulus lower than that of polyethylene terephthalate have been proposed (see Patent Document 1 and Patent Document 2). ) Power is considered to contribute to a certain degree of softness, but it is still not enough, and wind resistance (breathability) is unsatisfactory.

[0004] On the other hand, in order to improve windproof and water repellency, it is necessary to reduce the gap formed between the intersection of the fabric where the warp and weft of the fabric intersect and the adjacent intersection It is. In order to obtain a woven fabric having such a structure, it is desirable to increase the number of fiber yarns, and ultrafine fibers are used for the synergistic effect of the texture softness. As a method for obtaining such ultrafine fibers, a method for directly producing thin yarns and two or more types having different chemical resistance are used. There are methods that can be obtained by eluting one type of polymer after composite spinning and dividing it. However, in the conventional method of eluting the latter polymer, satisfactory windproof properties and water repellency cannot be obtained due to the influence of the inter-fiber spacing formed when the polymer is eluted. On the other hand, in the former case of producing ultrafine fibers by direct spinning, there is a limit to the single fiber fineness obtained.

[0005] As described above, these ultrafine fibers have been used in the past to improve the hard texture. Particularly, polyester ultrafine fibers having a single fiber fineness of 0.5 dtex or less are pitch-woven. Used for knitting. However, the ultrafine fiber yarn made of polyethylene terephthalate has a high refractive index of about 1.6, so the color developability of the ultrafine fiber is not sufficient. Or because the polymer itself has a high hang rate, it was unable to give a sufficient soft feeling.

[0006] Further, as a method for producing ultrafine fibers made of polyethylene terephthalate, many methods for producing ultrafine fibers of polyethylene terephthalate such as sea-island type composite fibers or split type composite fibers have been proposed. These composite fibers are made into ultrafine fibers made of polyethylene terephthalate by reducing or eluting one of the components by alkali treatment at the time of division. However, since the weight loss on the polyethylene terephthalate side, which should be made of ultrafine fibers, also proceeds at the same time as the weight loss force, the strength is reduced and may not be able to withstand practical use. For this reason, if the weight reduction processing conditions are relaxed, division processing may not be performed completely, which may lead to a reduction in product quality.

[0007] On the other hand, the above-mentioned fiber made of polytrimethylene terephthalate has an excellent elastic recovery rate, a low Young's modulus, a good dyeing property, a chemically stable property, and has been known for a long time. (See Patent Document 3 and Patent Document 4). Furthermore, a method for producing ultrafine fibers of polytrimethylene terephthalate such as sea-island type composite fibers or split type composite fibers has also been proposed (see Patent Document 5 and Patent Document 6). However, the polymer used as an easily eluting component in Patent Document 5 and Patent Document 6 is a polyester copolymerized with an organic metal salt, and has a long elution time and poor productivity. In addition, since the polymer melting temperature is higher than that of polytrimethylene terephthalate, it is necessary to keep the spinning temperature high.Therefore, the thermal degradation of polytrimethylene terephthalate advances and the operability deteriorates. There were problems such as inability to obtain degree and texture.

[0008] Furthermore, conventional sea-island type composite fibers or split type composite fibers use a copolymerized polyester as an easily-eluting component, and are mainly hydrolyzed and removed by alkali treatment. There is a concern that the waste liquid after decomposition has an adverse effect on the environment. In order to reduce the environmental impact of this waste liquid, a composite fiber using polylactic acid as an elution component has been proposed (see Patent Document 7). Although this will certainly reduce the impact on the environment, as described above, satisfactory windproof and water repellency can be obtained due to the effects of inter-single-fiber voids formed between single fibers after elution of polylactic acid. It cannot be done.

Patent Document 1: Japanese Patent Laid-Open No. 11-200174

Patent Document 2: Japanese Patent Laid-Open No. 2001-55644

Patent Document 3: Japanese Patent Laid-Open No. 52-5320

Patent Document 4: Japanese Patent Laid-Open No. 52-8124

Patent Document 5: JP-A-11-123330

Patent Document 6: Japanese Patent Laid-Open No. 2001-348735

Patent Document 7: JP-A-11-302926

Disclosure of the invention

Problems to be solved by the invention

[0009] Therefore, the object of the present invention is an ultrafine fiber made of polytrimethylene terephthalate, which has an unattainable power that can not be achieved by the above-described prior art, and is excellent in softness and color development when used as a woven fabric for clothing. The object is to provide a high-density woven fabric having excellent windproof properties.

[0010] Another object of the present invention is to provide a method for producing a high-density fabric excellent in windproof property, which is composed of ultrafine fibers made of the above polytrimethylene terephthalate. Means for solving the problem

The object of the present invention can be achieved by adopting the following configuration.

That is, the high-density fabric of the present invention is a fabric formed by using multifilaments having a single fiber fineness of 0.01 to 0.5 dtex made of polytrimethylene terephthalate for warp yarn and Z or horizontal yarn, warp yarn and ® co yarn total force bar rates in 1700 than 3500 or less, and air permeability is as high fabric than 1. 0ccZcm ² _'S. And, as a preferred embodiment of the high-density fabric of the present invention, the air permeability is less than 0.8 cc / cm ² ′ s, the average of the multifilament monofilaments comprising the polytrimethylene terephthalate The degree of irregularity is 1.05 or more and 5.0 or less, and the above-mentioned multifilament made of polytrimethylene terephthalate has crimps.

[0013] The method for producing a high-density fabric of the present invention is a sea-island type composite fiber in which the sea component polymer is composed of polylactic acid, and the island component polymer is composed of polytrimethylene terephthalate. Sea island type composite fiber with island component composite ratio of 10Z90 ~ 50Z50 and island component single fiber fineness of 0.01 ~ 0.5dtex obtained by dissolution treatment is used for warp yarn and Z or horizontal yarn Then, after weaving the woven fabric, polylactic acid is eluted by dissolution treatment.

[0014] And, as a preferred embodiment of the method for producing a high-density fabric of the present invention, a monofilament made of polytrimethylene terephthalate, which is an island component polymer, is dissolved after the polylactic acid of the sea component polymer is dissolved in a dissolution treatment. It may be mentioned that the shrinkage is 3% or more, and that the above-mentioned dissolution treatment is performed by using an alkaline solution.

The invention's effect

[0015] According to the present invention, a high-density fabric excellent in windproof property using an ultrafine fiber made of polytrimethylene terephthalate, which is excellent in softness and color developability when used as a woven fabric for clothing, is obtained. easy explanation

FIG. 1 is a surface photograph of a high-density fabric obtained in Example 1 of the present invention.

FIG. 2 is a photograph of the surface of the fabric obtained in Comparative Example 1.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode for carrying out the high-density fabric of the present invention and the method for producing the same will be described in detail.

In the high-density woven fabric of the present invention, it is necessary to use multifilaments having a single fiber fineness of 0.01-0.5 dtex made of polytrimethylene terephthalate for warp yarn and Z or horizontal yarn. The reason is to improve the hardness of the high-density fabric composed of multifilaments made of conventional polyethylene terephthalate and the insufficient color development when made into ultrafine fibers. It is to do. If the single fiber fineness is less than 0. Oldtex, the accuracy of one single fiber will be reduced, causing quality problems such as fluffing. On the other hand, if the single fiber fineness exceeds 0.5 dtex, the target software will be I can't get a feeling. A more preferable single fiber fineness is 0.05-0.2d tex.

[0018] The multifilament having a single fiber fineness of 0.01-0.5 dtex used in the present invention is preferably employed in a range of 33-168 dtex in total fineness.

[0019] The high-density woven fabric of the present invention is a warp yarn and a Z- or Yoko yarn that is a multi-filament made of polytrimethylene terephthalate of 0.01-0.5dtex. There may be no problem even if synthetic fibers such as fibers made of polyethylene terephthalate or natural fibers are partially contained, and the fibers made of polyethylene terephthalate may have a so-called irregular cross section such as a triangle or a flat shape. Here, in order to obtain a high-density fabric excellent in windproof property of the present invention, the polytrimethylene terephthalate is preferably used in a weight ratio of preferably 30% or more, and more preferably 40% or more. In addition, it is desirable that the weave structure is a plain structure (1Z1 flat mat, etc.) having a high binding force at the weaving intersection.

Next, in the present invention, in order to obtain a high-density fabric excellent in windproof property, which is the object of the present invention, the total bar ratio of the warp yarn and the horizontal yarn constituting the high-density fabric is 1700 or more and 3500 or less, and The air permeability of the high-density fabric must be less than 1. OccZcm ² · s.

[0020] The total force bar ratio of the warp yarn and the horizontal yarn is a factor representing the fineness of the warp yarn and the horizontal yarn constituting the fabric. Wind resistance and water repellency are not sufficient if the total bar ratio is less than 1700. On the other hand, fabrics with a total bar ratio exceeding 3500 are not preferable because they are a region that cannot be stably obtained in industrial production. A more preferable range of the total power bar rate is 2000 or more and 3000 or less. The total power bar rate mentioned here is calculated by the following equation.

[0021] Total power bar rate = Cover rate of warp yarn + Cover rate of horizontal thread

Cover rate of warp thread = Warp yarn density (Z inch) X (Vertical yarn fineness (dtex)) ^1/2 Cover rate of horizontal thread = Horizontal thread density (Z inch) X (Horizontal yarn fineness (dtex) )) ^{1/2 Further} , the air permeability is a measured value representing the windproof and water repellency performances of the present invention. The air permeability of the high density fabric of the present invention must be less than 1. OccZcm ^2's , Preferably less than 0.8 cc Zcm ² 's. Such air permeability is necessary to exhibit functionality when a high-density fabric is used as clothing. This air permeability is a force that can be reduced relatively easily by applying a high-temperature and high-pressure press, which is usually called “calendar” processing, when creating the fabric. In the present invention, the texture of the high-density fabric obtained becomes paper-like. For this reason, it is desirable to keep the processing under light conditions even if the adoption is poor. In addition to the calendering, a method of thinly coating polyurethane surface with a polyurethane-based resin can also be adopted as a means for reducing the air permeability. In addition, the air permeability in the present invention is a value measured according to 8.27.1 A method (fragile method) of JIS L1096 (1999 edition).

[0022] The air permeability here can also provide a secondary performance of force that represents windproof and water repellency performance. In other words, since the high-density fabric of the present invention is dense, it is possible to make the powder or particles such as pollen difficult to stick by applying the fabric as it is or with a light water-repellent treatment. It can also be used for allergies such as clothing.

[0023] Here, the filament made of polytrimethylene terephthalate constituting the high-density fabric in the present invention preferably has an irregular cross section in which the average irregularity of the single fiber is 1.05 or more and 5.0 or less. Due to the bending moment characteristics of irregular cross-section fibers, there is a direction in which one single fiber tends to bend, and as an extreme example, flat cross-section fibers tend to bend in the short axis direction of the cross section, but the long axis direction of the cross section It is hard to bend. This property affects the opening state of the multifilament when it becomes a woven fabric. Fibers with irregular cross-sections tend to have better spreadability than fibers with uniform round cross-sections, and it is even better if there are variations in the degree of irregularity between the constituent single fibers. This high fiber-opening effect has the effect of reducing the gap between the crossing point of the fabric where the warp yarn and the horizontal yarn cross and the adjacent crossing point, which are necessary to improve windproof and water repellency. There is. In order to obtain this effect, the average profile of the filament cross section is preferably 1.05 or more and 5.0 or less. Here, the average degree of irregularity means taking a photograph of the fiber cross section, measuring the diameter n of the maximum inscribed circle of the cross sectional shape and the maximum width m of the cross section, and calculating the degree of irregularity of the single fiber by the following formula. This is the average of the cross sections of individual fibers.

Deformity = mZn X 100 (%)

If the average degree of profile is less than 1.05, it is difficult to obtain the desired effect of improving the spreadability. On the other hand, if the average profile exceeds 5.0, the yarn will be very flat and the bending direction will be constant, and the single fibers will be lined up in the same direction on the fabric. There is a tendency to get worse.

[0024] Such a modified cross-section fiber sets the spinneret, changes the island component polymer arrangement of the sea-island type composite fiber, the number of island components, the composite ratio of the sea component polymer and the island component polymer, and the like. By this, it can be obtained as a fiber having a deformed cross section.

[0025] It is also a preferred aspect that the multifilament made of polytrimethylene terephthalate used in the high-density fabric of the present invention has crimps. This is due to the fact that the multifilament has crimps, so that when it is made into a woven fabric, the effect of reducing the gap between the crossing point of the fabric where the warp yarn and the horizontal yarn cross each other and the adjacent crossing point is improved. This is because the property and water repellency are improved. As a method for imparting crimps to the multifilament, a general false twisting caloe method or the like can be employed.

[0026] Next, a method for producing a high-density fabric of the present invention will be described.

[0027] The force of the high-density woven fabric of the present invention is composed of ultrafine fibers made of polytrimethylene terephthalate. This ultrafine fiber can be suitably obtained by the so-called sea-island type composite fiber force. Specifically, weaving a fabric using sea-island type composite fibers using polylactic acid polymer as the sea component and polytrimethylene terephthalate polymer as the island component, and there is a dyeing process after weaving. Then, the polylactic acid, a sea component, is dissolved and removed to form polytrimethylene terephthalate ultrafine fibers. The ultrafine fiber obtained here is a multifilament because it has a cross-sectional structure in which a plurality of island components are scattered in the sea component.

[0028] It is important for the sea-island type composite fiber used in the production method of the present invention to dispose polylactic acid as a sea component. Polylactic acid has a lower melting temperature than polytrimethylene terephthalate and polyethylene terephthalate, so the melting temperature is higher than that of polytrimethylene terephthalate V, compared to the case where polyethylene terephthalate copolymerized with an organic metal salt is used as the sea component. The spinning temperature can be kept low. This makes it possible to stabilize the operation in the process from the raw yarn production stage to the higher heating stage and to prevent the texture from being lowered due to thermal degradation of the island component polytrimethylene terephthalate. [0029] In addition, polylactic acid generally has a higher alkali dissolution rate than a polyester copolymerized with an organic metal salt, but sea-island type composite fiber further comprising polylactic acid as a sea component and polytrimethylene terephthalate as an island component. By doing so, the orientation of polylactic acid is suppressed and the alkali elution rate of polylactic acid becomes faster.

[0030] Further, the sea-island type composite fiber in which polylactic acid and polytrimethylene terephthalate are combined as described above is composed of polytrimethylene terephthalate divided as island components after the polylactic acid as a sea component is removed by alkali treatment or the like. It is possible to impart a unique phenomenon of leaving the shrinkage to the ultrafine fibers. For this reason, after forming the ultrafine fibers, it is possible to increase the weave density of the fabric and further densify it.

[0031] This point will be further described. Conventional polyester sea-island type composite fibers generally use polyethylene terephthalate obtained by copolymerizing a sea component with an organic metal salt having a high alkali elution rate, and ordinary polyethylene terephthalate is used for the island component. The sea components are eluted after the sea-island type composite fiber is knitted into a knitted fabric. The sea-island composite fiber using polyethylene terephthalate copolymerized with this organometallic salt has almost the same heat setting property as the sea component and the island component, so that the sea-island component shows uniform shrinkage after spinning Z drawing. Become. In addition, in order to ensure the elution of polyethylene terephthalate copolymerized with an organometallic salt after formation of the knitted fabric, the elution failure tends to occur only with alkali treatment, and the alkali elution rate between the sea component and the island component is high. Because it is relatively close, in order to selectively decompose only the sea component, the knitted woven fabric is treated with a high-temperature acid to crack the interface between the sea component and the sheath component. Often, seawater components are eluted during processing. For this reason, the island component after eluting the sea component has almost no shrinkage.

On the other hand, in the case of a sea-island type composite fiber using a polylactic acid polymer as a sea component and a polytrimethylene terephthalate polymer as an island component as in the production method of the present invention, first, polylactic acid and polytrimethylene are used. The difference in the heat setting property of terephthalate is noted. Polylactic acid is heat-set at a relatively low temperature, whereas polytrimethylene terephthalate is not heat-set unless the temperature is high compared to polylactic acid, and shrinkage remains at a temperature at which polylactic acid can be heat-set. It becomes. In addition, polyethylene terephthalate copolymerized with organic metal salts of the prior art In comparison, polylactic acid has a rapid alkali hydrolysis, that is, alkali elution, while island trimer polytrimethylene terephthalate has a slower alkali hydrolysis, that is, alkali elution, than ordinary polyethylene terephthalate. Therefore, when sea components are eluted as in the prior art described above, sea components can be stably eluted only by a relatively low temperature alkali treatment without prior high-temperature acid treatment. Furthermore, even after the polylactic acid, which is a sea component, is dissolved, the shrinkage performance remains in the polytrimethylene terephthalate, which is an island component, so that the density of the dough can be further refined after the sea component is eluted.

[0033] Specifically, the shrinkage imparting rate of the ultrafine fiber made of polytrimethylene terephthalate after elution of polylactic acid, which is a sea component, depends on! Therefore, although it cannot be generally stated, it is possible to increase the density of the fabric by shrinking 3% or more.

[0034] Due to the combined effect of these polylactic acid and polytrimethylene terephthalate, the productivity of polytrimethylene terephthalate, which is the object of the present invention, is excellent in softness and color development when used as a woven fabric for clothing. It is possible to provide a high-density fabric excellent in windproof properties that has ultrafine fiber strength.

[0035] The polylactic acid referred to in the present invention is not particularly limited, but L-lactic acid having a number average molecular weight of 50,000 to 100,000 is preferred and the purity is 95.0% to 99.5%. Polylactic acid consisting of Such polylactic acid can maintain the strength in each manufacturing process and obtain a suitable biodegradability, so the environmental impact of the waste liquid after elution is small. Further, the polylactic acid may be a copolymerized polylactic acid obtained by copolymerizing L-lactic acid or D-lactic acid with other components having ester forming ability.

[0036] Particularly preferable polylactic acid includes, from the viewpoint of high melting point and low refractive index, polylactic acid which is a polyester mainly composed of L-lactic acid and polyglycolic acid which is a polyester mainly composed of glycolic acid. Can do. “L-lactic acid as a main component” means that 60% by weight or more of the constituent components are made of L-lactic acid, and it is a polyester containing D-lactic acid in a V and range not exceeding 40% by weight. Anyway!

[0037] Other components copolymerizable with polylactic acid include glycolic acid, 3-hydroxybutyric acid, 4-hydroxybutyric acid, 4-hydroxyvaleric acid, and 6-hydroxycaproic acid. In addition to boronic acids, compounds containing multiple hydroxyl groups in their molecules, such as ethylene glycol, propylene glycol, butanediol, neopentyl dallicol, polyethylene glycol, glycerin and pentaerythritol, or their derivatives, adipic acid, sebacic acid , Fumaric acid, terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, 5-sodium sulfoisophthalic acid and 5-tetrabutylphosphoro-isophthalic acid, etc. Or a derivative thereof.

[0038] The number average molecular weight of polylactic acid is preferably as high as it does not exceed 300,000. The number average molecular weight is preferably 50,000 or more, and more preferably 100,000 or more.

[0039] By setting the number average molecular weight to 50,000 or more, it is possible to obtain fiber strength properties at a level that can be used for production, and by setting the number average molecular weight to 300,000 or less, an increase in the viscosity of the polymer is suppressed. Therefore, the spinning temperature can be kept low, and therefore, thermal decomposition of the polymer can be prevented and stable spinning can be performed.

[0040] In order to reduce the melt viscosity, aliphatic polyester polymers such as polystrength prolataton, polybutylene succinate, and polyethylene succinate can be used as an internal plasticizer or as an external plasticizer. Furthermore, inorganic fine particles and organic compounds can be added as necessary, such as a defoaming agent, deodorant, flame retardant, yarn friction reducing agent, antioxidant and coloring pigment.

[0041] Polytrimethylene terephthalate used as an island component is a polyester obtained using terephthalic acid as a main acid component and 1,3-propanediol as a main glycol component. The polytrimethylene terephthalate is most preferably 100 mol%, but it may contain a copolymer component capable of forming another ester bond at a ratio of 20 mol% or less, preferably 10 mol% or less.

Examples of the copolymerizable compound include dicarboxylic acids such as isophthalic acid, cyclohexane dicarboxylic acid, adipic acid, dimer acid, and sebacic acid, while the glycol component includes, for example, ethylene glycol, Powers that can include diethylene glycol, butanediol, neopentyl glycol, cyclohexane dimethanol, polyethylene glycol and polypropylene glycol. It is not limited.

[0042] In addition, titanium dioxide as a quenching agent, fine particles such as silica and alumina as a lubricant, hindered phenol derivatives as an antioxidant, and coloring pigments may be added as necessary. Can do.

In addition, the composite ratio of the sea component Z island component of the sea island type composite fiber used in the present invention is

From the viewpoint of the stability of the composite form, yarn production and productivity, it is preferably 10Z90 to 50Z50 (weight ratio). When the composite ratio of the sea component is less than 10%, a composite abnormality occurs, resulting in poor partitioning, or even when the composite form is normal, poor splitting due to poor dissolution of the sea component results in sufficient softness. There are things you can't get. On the other hand, when the composite ratio of the sea components exceeds 50%, productivity is lowered, which is not preferable. Sea component of sea-island type composite fiber A more preferable composite ratio of the island component is 15 to 85 to 40 to 60 (weight ratio).

[0043] In addition, in the sea-island type composite fiber used in the present invention, it is preferable that the single fiber fineness of the island component after removing the sea component is 0.01 to 0.5 dtex. This is to improve the hardness of the high-density fabric made of conventional polyethylene terephthalate and the insufficient color development when made into ultrafine fibers. If the single fiber fineness is less than 0. Oldtex, the single fiber Since the accuracy of each one is reduced, quality problems are likely to occur. On the other hand, if the single fiber fineness is larger than 0.5 dtex, the desired soft feeling cannot be obtained, which is not desirable. A more preferable single fiber fineness is 0.05 to 0.2 dtex.

[0044] The cross-sectional shape of the sea-island composite fiber used in the present invention may be an irregular cross-section such as flat, hollow, and triangular in addition to a round cross-section. In addition, the island surface is completely covered with the sea component on the fiber surface of the sea-island type composite fiber, or even if the island component is partially exposed! Furthermore, the cross-sectional shape of the island component after the sea component is removed may be an irregular cross-section such as a flat or triangular shape in addition to the round cross-section.

[0045] The sea-island type composite fibers used in the present invention are shown in, for example, FIG. 3 described in Japanese Patent Laid-Open No. 57-47938 and FIG. 2 described in Japanese Patent Laid-Open No. 57-82526. It can be manufactured using the device shown as a preferred example. That is, after the polymer that is the sea component and the polymer that is the island component are filtered through separate polymer introduction pipes in the respective filtration chambers, This can be obtained by using a composite spinneret that can associate (join) in a split flow state with the die pores through the gold inflow hole.

[0046] In producing the sea-island type composite fiber used in the present invention, a method in which spinning and drawing processes are continuously performed, a method in which the yarn is unwound and then drawn and then drawn, or high-speed yarn production. Any method such as a method can be applied. Furthermore, the sea-island type composite fiber used in the present invention may be subjected to yarn processing such as false twisting and air entanglement as necessary.

[0047] After obtaining the sea-island type composite fiber as described above, the sea-island type composite fiber is used for weaving. As the fabric structure, a conventional structure can be used, and a loom used for weaving and a conventional loom with conventional power can be used. Weaving should be performed so that the total bar ratio of the warp and weft yarns is 1700 or more and 3500 or less and the air permeability is less than 1.0 ccZcm ² 's.

[0048] Next, the woven fabric of the sea-island type composite fiber obtained by weaving the sea-island type composite fiber is subjected to a dissolution treatment (Al force re-elution treatment).

[0049] The sea component dissolution treatment can be performed in an alkaline solution of preferably 10 to: LOOgZl, more preferably 20 to 80 gZl. As the alkaline solution, a sodium hydroxide solution is usually used, and the treatment may be performed at a temperature of 60 to 120 ° C. That is, a normal alkali elution process can be employed.

[0050] After the dissolution treatment, a dyeing treatment, a heat setting treatment, or the like can be performed according to the intended use.

Further, even if the obtained high-density woven fabric is subjected to water repellent treatment or the like, there is no problem.

[0051] The high-density woven fabric of the present invention is suitably used for sportswear and casual wear that are vibrant in terms of windproof and water repellency, and for outer fabrics such as down jackets and batting jackets that are active in high density.

Example

[0052] The present invention will be described in more detail with reference to the following examples. Each characteristic value in the examples was obtained by the following method.

[0053] A. Intrinsic viscosity [7?]

0.10 g of a sample was dissolved in 10 ml of orthochlorophenol and measured using a Ostwald viscometer at a temperature of 25 ° C.

[0054] B. Air permeability Measured in accordance with JIS L1096 (1999 edition) 8.27.1 A method (Fragile method).

[0055] C. Average profile

Create a section of the fiber cross-section, take a picture and observe it, measure the diameter n of the maximum inscribed circle of the cross-sectional shape and the maximum width m of the cross-section, calculate the degree of irregularity of each single fiber by the following formula, The average profile of 10 fiber sections was determined.

Deformity = mZn X 100 (%)

D. Woven yarn density and coverage

In accordance with 8.6.1 of JIS L1096 (1999 edition), the warp yarn density and the horizontal yarn density were measured respectively.

[0056] The obtained warp yarn density and horizontal yarn density force The cover ratio was calculated by the following equation.

Total power bar rate = Cover rate of warp yarn + Cover rate of horizontal yarn

Cover rate of warp thread = Warp yarn density (Z inch) X (Vertical yarn fineness (dtex)) ^1/2 Cover rate of horizontal thread = Horizontal thread density (Z inch) X (Horizontal yarn fineness (dtex) )) ^1/2

E. Filament strength, boiling water shrinkage

The filament strength was measured in accordance with JIS L1013 (1999 edition) 8.5.1 (standard test). The unit is cNZdtex.

[0057] The boiling water shrinkage was measured in accordance with 8.18.1 A method (skein shrinkage) of JIS L1013 (1999 edition).

[Example 1]

Dimethino terephthalenolic acid 19.4 kg, 1,3 Prononde 1 15.2 kg 【This tetrabutino retitanate is used as a catalyst to perform ester exchange reaction while distilling methanol at a temperature of 140 ° C to 230 ° C. Then, polymerization was further performed for 3.5 hours under the condition of a constant temperature of 250 ° C. to obtain polytrimethylene terephthalate having an intrinsic viscosity [r?] Of 0.96. Using polytrimethylene terephthalate obtained by the above manufacturing method as island component, using poly-L lactic acid with optical purity of 98.0% as sea component, sea Z island = 20Z80 (weight ratio) Using a sea-island type compound base with 8 island components and 36 holes, the unspun yarn was wound with a compound spinning machine at a spinning temperature of 250 ° C and a take-up speed of 1500 mZ. Subsequently, the undrawn yarn was drawn at a temperature of 80 ° C using a normal hot roll hot roll drawing machine, and the heat setting temperature 1 Stretching was performed at 20 ° C so that the stretched yarn had an elongation of 35%, and a stretched yarn of 66 dtex-36 filament was obtained. The drawn yarn had a strength of 3.7 cNZdtex and a boiling water shrinkage of 10.0%. Using the obtained drawn yarn for warp and horizontal yarn, weaving a plain fabric with a warp density of 145 (main Z inch) and a horizontal yarn density of 95 (main Z inch), and then hydrated sodium hydroxide 30 (Treatment in warm water of 80 ° C with gZD concentration for 60 minutes yielded a fabric that eluted the sea component polylactic acid and also had ultra-fine fiber (multifilament) force. At this stage, a sample of the fabric was obtained. Cut and observed the cross section of the fabric with a scanning electron microscope (SEM), and it was confirmed that the sea components were completely eluted.After presetting at a temperature of 150 ° C, using a liquid dyeing machine. Dianix Navy Blue BE— SF was used at a concentration of 2% owf, dyed at a temperature of 120 ° C, Z-reduced, and finished and set at a temperature of 140 ° C. Z inch), high-density fabric ® co yarn density 108 (the Z-inch), the air permeability is 0. 5ccZcm ² 's and windproof is Kogu and soft Tesawa Had an excellent color forming property and. Coverage warp at this time is 1235, coverage ® co yarn Ri 785 der, the all-out bar rate was 2020.

[0059] This high density fabric strength was 1.26 when the multifilament was disassembled, a section of the fiber cross section was taken and a cross section photograph was taken to calculate the average degree of deformity. Fig. 1 shows a photograph of the surface of the resulting high-density fabric.

[0060] (Comparative Example 1)

As the sea component, polyethylene terephthalate with an intrinsic viscosity [7?] Of 0.56 copolymerized with 4.5 mol% of 5-sodium sulfoisophthalic acid, and polyethylene terephthalate with no third component copolymerized with the island component, Using the same base and composite spinning machine as in Example 1, the fiber was wound at a spinning temperature of 280 ° C and a take-up speed of 1500 mZ, and the resulting undrawn yarn was drawn in the same manner as in Example 1 to obtain a drawn yarn. It was. The obtained drawn yarn was 66 dtex-36 filament, the strength was 2.5 cNZdtex, and the boiling water shrinkage was 8.0%. The resulting drawn yarn is used for warp and horizontal yarns, and a plain fabric with a warp yarn density of 145 (main Z inch) and a horizontal yarn density of 95 (main Z inch) is woven, and sodium hydroxide 30 ( Attempted to elute the copolyester of sea component by treating in warm water at 80 ° C with gZD concentration for 60 minutes, cut the sample of the fabric after alkali treatment and observed the cross section of the fabric with a scanning electron microscope (SEM) However, the sea component is completely It was confirmed that it was poorly resolved. For this reason, the obtained raw machine is first treated with acetic acid l (gZl) at 130 ° C in hot water for 30 minutes, washed with neutralized Z water, and again with sodium hydroxide 30 (gZD at 80 ° C in warm water). The sample was processed for 60 minutes to try to elute the copolyester of the sea component, cut the fabric sample after alkali treatment, and observed the cross section of the fabric with a scanning electron microscope (SEM). Next, after presetting at a temperature of 150 ° C, dyeing at a temperature of 130 ° C using Dianix Navy Blue BE—SF at a 2% owf concentration using a flow dyeing machine. Z-reduced and finished and set at a temperature of 140 ° C. The resulting fabric is a fabric with a warp density of 153 (lines Z inches) and a weft density of 100 (lines Z inches), and the air permeability is 6. although 7ccZcm ² 's and windproof is higher Nag soft texture, color development was poor. coverage warp yarn in this case 111 2, coverage ® co yarn is 727, the total force bars ratio was 1839. Showing a photograph of the surface of the resultant woven product in Figure 2.

[Example 2]

The same sea-island type composite fiber as used in Example 1 is used for the horizontal thread, the warp yarn is a 56 dtex-l 44 filament polyethylene terephthalate false twist yarn, and the warp density is 199 (in Z inches) Weaving a plain weave with a weft yarn density of 111 (in Z inches), and then treating with 30% hydrous acid sodium hydrate (gZD concentration in 80 ° C warm water for 60 minutes) A woven fabric consisting of ultrafine fibers (multifilaments) was obtained, and after presetting at a temperature of 150 ° C, dyeing Z was reduced and washed at a temperature of 130 ° C using a liquid dyeing machine. The resulting fabric was a high-density fabric with a warp yarn density of 238 (lines Z inches) and a weft yarn density of 129 (lines Z inches) with an air permeability of 0.8 ccZcm. ² 'were those high _S and windproof. coverage warp at this time is 1781, ® co yarn coverage Is 937, the all-out bar rate was 2718.

Industrial applicability

[0062] The high-density fabric using the fiber yarn made of polyethylene terephthalate according to the present invention can achieve higher density than ever, and can be used widely for sports fabrics having windproof and water repellency. It is.

Claims

The scope of the claims

[1] The single fiber fineness of polytrimethylene terephthalate on warp and Z or horizontal

0. 01-0. Woven fabric made of 5dtex multifilament, the total bar ratio of warp and horizontal yarn is 1700 or more and 3500 or less, and air permeability is less than 1.0ccZcm ^2's A high-density fabric characterized by that.

[2] The high-density fabric according to claim 1, wherein the air permeability is less than 0.8 cc Zcm ² ′ _S.

[3] The high-density woven fabric according to claim 1 or 2, wherein the average degree of irregularity of the multifilament single fiber made of polytrimethylene terephthalate is 1.05 or more and 5.0 or less.

[4] The high-density fabric according to [1], wherein the multifilament made of polytrimethylene terephthalate has crimps.

[5] A sea-island composite fiber in which the sea component polymer is composed of polylactic acid and the island component polymer is composed of polytrimethylene terephthalate, and the composite ratio of the sea component Z island component is 10Z90 to 50Z50 Yes, weaving the woven fabric using sea-island type composite fibers with an island component single fiber fineness of 0.01 to 0.5 dtex obtained by dissolution treatment in warp yarn and Z or horizontal yarn, and then by dissolution treatment A method for producing a high-density fabric, wherein polylactic acid is eluted.

[6] The method for producing a high-density fabric according to claim 5, wherein after the polylactic acid of the sea component polymer is eluted by a dissolution treatment, a single fiber composed of polytrimethylene terephthalate that is the island component polymer is contracted by 3% or more. .

7. The method for producing a high-density fabric according to claim 5 or 6, wherein the dissolution treatment is performed with an alkaline solution.