JP2015098661A - Combined filament entangled yarn, method for producing the same, and woven or knitted fabric including combined filament entangled yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combined filament entangled yarn capable of imparting a high water-repellent performance to a woven or knitted fabric by using a conventionally well-known low cost fluorine-based water repellent without particularly devising a structure of the woven or knitted fabric.SOLUTION: The combined filament entangled yarn is composed of a polyester fiber A having a single fiber fineness of 0.2-0.9 dtex and a polyester fiber B having a single fiber fineness of 1.0-5.0 dtex. The combined filament entangled yarn has a false-twist crimp as a whole and a mass ratio (A/B) of the polyester fiber A to the polyester fiber B is in a range of 20/80-80/20, and a projection is formed by the polyester fiber A on a surface part of the combined filament entangled yarn.

Description

  The present invention relates to a mixed entangled yarn having fine convex portions on the surface of a yarn and capable of imparting high water repellency to a woven or knitted fabric, a preferred production method thereof, and a woven or knitted fabric using the mixed tangled yarn.

  Conventionally, a woven or knitted fabric having water repellency has been demanded in the field of uniform clothing, sports clothing, and the like, and many water-repellent woven and knitted fabrics have been proposed so far. In recent years, from the viewpoint of adding added value to a woven or knitted fabric, a cheaper and higher water-repellent performance is demanded, and it is the actual situation that simply satisfying the water-repellent processing of the woven or knitted fabric cannot meet such a demand.

  In order to impart high water repellency to the woven or knitted fabric, firstly devise the composition of the water repellant, and secondly devise the structure of the woven or knitted fabric that is the base material to make the characteristics of the water repellant easier to express. It is effective to be.

  For example, Patent Literature 1 and Patent Literature 2 propose a technique for devising a water repellent. It is described that if these techniques are used, high water repellency can be imparted to the woven or knitted fabric.

  On the other hand, as a technique for devising the structure of the woven or knitted fabric, for example, Patent Document 3 and Patent Document 4 provide a fine concavo-convex structure on the surface of the woven or knitted fabric, thereby expressing a lotus effect that supports water droplets with dots, Technologies that improve performance have been proposed.

JP 2007-231442 A Japanese Patent No. 2002-201443 Japanese Patent Publication No. 5-83666 Japanese Examined Patent Publication No. 4-5786

  For example, the means for obtaining the desired water repellency by devising the composition of the water repellant, as disclosed in Patent Document 1 and Patent Document 2, has uniformly excellent water repellency regardless of the design of the woven or knitted fabric. It is effective in that it can be granted. However, these water repellents are expensive compared to fluorine-based water repellents that have been widely used in the past, and can exhibit predetermined water repellent performance only under limited processing conditions. There is a problem that there are many obstacles in the commercial production of woven and knitted fabrics whose water repellency is enhanced by these water repellents, such as the necessity of dedicated equipment for water repellent finishing.

  On the other hand, as disclosed in, for example, Patent Document 3 and Patent Document 4, a means for devising the surface structure as a woven or knitted fabric to exhibit a desired water-repellent performance is a conventionally known inexpensive method such as a fluorine-based water repellent. If a water repellent is used and processed under existing conditions, there is an advantage that the woven or knitted fabric can exhibit high water repellency. However, in the case of the technique for devising the structure of the woven or knitted fabric, although a certain improvement in water repellency is recognized, there is a problem that it is not yet at a satisfactory level as compared with the method of devising the composition of the water repellent. . Furthermore, since the woven or knitted fabric is limited to a specific one having a specific surface structure, a different surface structure cannot be adopted when performing commercial development, and there is a problem that applications are limited.

  Under such circumstances, a technique for imparting high water repellency using a conventionally known inexpensive fluorine-based water repellent is desired without specially devising the structure of the woven or knitted fabric. So far it has not been proposed. The present invention eliminates these disadvantages of the prior art. That is, the present invention provides a mixed entangled yarn that can impart high water repellency to a woven or knitted fabric by using a conventionally known inexpensive fluorine-based water repellent without specially devising the structure of the woven or knitted fabric. The main purpose is to do.

  The present inventor has intensively studied the reason why the conventional technology for obtaining water repellency by providing a fine concavo-convex structure on the surface of a woven or knitted fabric does not provide the desired water repellency. As a result, it was found that the uneven structure is not sufficiently dense and can support large water droplets, but small water droplets tend to fall into the uneven grooves. Furthermore, it has been found that sufficient surface tension of the water droplets is effective in producing the lotus effect, and it is not sufficient to simply support the water droplets with a concavo-convex structure. It was thought that some kind of contrivance was necessary to suppress the movement of the fabric into the woven or knitted fabric.

  In view of the fact that the conventional technology for providing a fine concavo-convex structure on the surface of the woven or knitted fabric embodies the structure exclusively by devising the design of the woven or knitted fabric such as the structure, density, and weight of the woven or knitted fabric, I thought that such a device would no longer provide a fundamental solution to further improve the water repellency. In other words, by devising the structure of the yarn itself constituting the knitted or knitted fabric, it was thought that whatever the design of the woven or knitted fabric could obtain the desired water-repellent performance, there would be no restrictions on the use of the woven or knitted fabric. . Based on such knowledge, the present inventor has conducted extensive studies on the structure of the yarn, and as a result, the fibers on the surface portion of the yarn can It has been found that the contact area can be reduced and the surface tension of water droplets can be easily developed. Furthermore, it has been found that by forming the inside of the yarn with fibers having a relatively large fineness, the protruding portion is held in the surface portion in the surface portion of the yarn, and the protruding portion is hardly crushed. Further, in the surface portion of such a yarn, the protruding portion due to the thin fibers protrudes from a portion formed by gently entwining the fibers, and the portion where the thin fibers are entangled is the portion of the yarn. A layer that can hold a lot of air (air retention layer) is formed on the surface, and when the yarn is made into a woven or knitted fabric, this air retaining layer blocks water droplets on the surface of the woven or knitted fabric, It has been found that water droplets can be effectively suppressed.

  As described above, the present inventor can use a specific yarn as described above to use only a conventionally known inexpensive fluorine-based water repellent, without specially designing a woven or knitted fabric. It was found that the knitted fabric can exhibit high water repellency. The present invention has been completed by further studies based on these findings.

That is, this invention provides the invention of the aspect hung up below.
Item 1. A mixed entangled yarn composed of a polyester fiber A having a single yarn fineness of 0.2 to 0.9 dtex and a polyester fiber B having a single yarn fineness of 1.0 to 5.0 dtex,
The mixed fiber entangled yarn has a false twist crimp as a whole, and the mass ratio (A / B) of the polyester fiber A and the polyester fiber B is in the range of 20/80 to 80/20,
A mixed fiber entangled yarn in which a protruding portion of the polyester fiber A is formed on a surface portion of the mixed fiber entangled yarn.
Item 2. Item 2. The mixed tangled yarn according to Item 1, wherein the crimp rate is in the range of 10 to 45% and the entanglement number is in the range of 90 to 150 pieces / m.
Item 3. Item 3. The mixed fiber entangled yarn according to Item 1 or 2, wherein the polyester fiber B contains a sunlight shielding substance.
Item 4. Item 3. The mixed fiber entangled yarn according to Item 1 or 2, wherein the polyester fiber B contains an infrared absorbing substance.
Item 5. The method for producing a mixed fiber entangled yarn according to any one of Items 1 to 4,
A drawing step of drawing a polyester highly oriented undrawn yarn B having a single yarn fineness of 1.5 to 6.5 dtex and an elongation of 100 to 160% at a draw ratio of 1.1 to 1.4 times;
The polyester highly oriented stretched yarn B stretched in the stretching step and the polyester highly oriented unstretched yarn A having a single yarn fineness of 0.4 to 1.3 dtex and an elongation of 80 to 110% are processed at a processing speed of 100 to 100%. A composite false twisting step of composite false twisting under conditions of 700 m / min and a draw ratio of 1.10 to 1.30 times;
A mixed fiber entanglement step in which the composite false twisted yarn obtained in the composite false twisting step is mixed and entangled under conditions of an air pressure of 0.1 to 0.6 Mpa and an overfeed rate of 1 to 4% using a fluid nozzle;
A method for producing a mixed fiber entangled yarn.
Item 6. A woven or knitted fabric in which the mixed fiber entangled yarn according to any one of Items 1 to 4 is woven and knitted,
A woven or knitted fabric having a mean deviation (SMD) of the surface roughness of the woven or knitted fabric by the KES-F system in the range of 3.0 to 8.0 μm and water-repellent.
Item 7. Item 7. The woven or knitted fabric according to Item 6, wherein the cover factor (CF) is in the range of 1500 to 3000, and the water droplet rolling angle is 15 degrees or less.

  According to the present invention, there is provided a mixed fiber entangled yarn that can impart high water repellency to a woven or knitted fabric by using a conventionally known inexpensive fluorine-based water repellent without specially devising the structure of the woven or knitted fabric. can do. That is, in the mixed fiber entangled yarn of the present invention, fine fibers constituting the mixed fiber entangled yarn protrude from the surface portion of the mixed fiber entangled yarn. When water droplets come into contact with the protruding portions of the thin fibers, the surface tension of water is sufficiently exerted. For this reason, when the mixed entangled yarn is used in a woven or knitted fabric, the water repellency excellent in the woven or knitted fabric (specifically, a lotus effect in which water drops roll when an angle is applied to a woven or knitted fabric on which water droplets are placed). Can be granted. Therefore, the woven or knitted fabric of the present invention using the mixed fiber entangled yarn has high water repellency by using a conventionally known inexpensive fluorine-based water repellent without specially devising the structure of the woven or knitted fabric. Demonstrate. Furthermore, according to the present invention, it is possible to provide a method for producing the mixed fiber entangled yarn and the woven or knitted fabric that exhibit such excellent water repellency.

It is an optical microscope photograph of the surface part of the mixed fiber entangled yarn of this invention. It is a schematic diagram for demonstrating the manufacturing method of this invention.

  The mixed fiber entangled yarn of the present invention is a mixed fiber entangled yarn composed of a polyester fiber A having a single yarn fineness of 0.2 to 0.9 dtex and a polyester fiber B having a single yarn fineness of 1.0 to 5.0 dtex. And the said mixed fiber entangled yarn has a false twist crimp as a whole, and the mass ratio (A / B) of the polyester fiber A and the polyester fiber B is in the range of 20/80 to 80/20. In addition, a protruding portion of the polyester fiber A is formed on the surface portion of the mixed fiber entangled yarn. Hereinafter, the mixed fiber entangled yarn of the present invention, the method for producing the mixed fiber entangled yarn, the knitted fabric using the mixed fiber entangled yarn, and the method for producing the woven / knitted fabric will be described in detail.

1. Mixed fiber entangled yarn The mixed fiber entangled yarn of the present invention comprises a polyester fiber A having a single yarn fineness of 0.2 to 0.9 dtex and a polyester fiber B having a single yarn fineness of 1.0 to 5.0 dtex. Yes. In the mixed fiber entangled yarn of the present invention, the polyester fiber A and the polyester fiber B can be sufficiently entangled by setting the fineness of the polyester fiber A and the polyester fiber B to such specific ranges, respectively. . Due to this entanglement, a relatively thin protruding portion of the polyester fiber A is easily formed on the surface portion of the mixed fiber entangled yarn of the present invention. In the present invention, the protruding portion of the polyester fiber A refers to a portion where the polyester fiber A protrudes to the outside due to a loop or slack of the polyester fiber A in the surface portion of the mixed fiber entangled yarn.

  Here, FIG. 1 is an optical micrograph of an example of the mixed fiber entangled yarn of the present invention. The surface structure of the mixed fiber entangled yarn of the present invention will be described with reference to FIG. The surface portion of the mixed fiber entangled yarn of the present invention is formed with a protruding portion made of a relatively thin polyester fiber A as compared with the polyester fiber B. Since the fine protrusions on the surface portion of the mixed fiber entangled yarn are formed by relatively thin polyester fibers A, when water drops are placed on the protruding parts, the water drops are inside the mixed fiber entangled yarn. Difficult to migrate. Therefore, by using the mixed entangled yarn 1 of the present invention to form a woven or knitted fabric, a so-called lotus effect is produced at the convex portion, and the woven or knitted fabric can exhibit excellent water repellency. In addition, as described later, in the mixed fiber entangled yarn of the present invention, two types of polyester fibers A and B having a specific single yarn fineness are mixed at a specific mass ratio. In the surface portion, a portion in which relatively thin polyester fibers A are gently entangled is formed. And the part in which this fine fiber was entangled forms the layer (air holding layer) which is easy to hold | maintain air. The protruding portion of the present invention protrudes from this portion where the polyester fibers A are intertwined. That is, since the air retention layer formed by gently entwining the thin polyester fiber A is formed inside the protruding portion of the polyester fiber A (inside the mixed entangled yarn), the mixed fiber of the present invention It is difficult for moisture to move inside the entangled yarn. In the mixed fiber entangled yarn of the present invention, the polyester fibers A and B are intertwined inside the air retaining layer.

  From the viewpoint of making a mixed fiber entangled yarn capable of imparting high water repellency to a woven or knitted fabric, the single yarn fineness of the polyester fiber A is preferably about 0.3 to 0.7 dtex. In addition, when the single yarn fineness of the polyester fiber A is less than 0.2 dtex, the fiber is too thin and the opening effect is poor, the entanglement effect with the polyester fiber B is reduced, and entanglement failure is likely to occur. On the other hand, when the single yarn fineness of the polyester fiber A exceeds 0.9 dtex, the fiber becomes stiff and the fiber mixing with the polyester fiber B becomes insufficient, so that entanglement failure tends to occur. Further, when the polyester fiber A is thick, the contact area with the water droplets when the woven or knitted fabric is made becomes large, and further, since the fiber becomes rigid, it becomes difficult to form the air retaining layer as described above, and as a result It becomes difficult to obtain water repellency.

  Moreover, when the single yarn fineness of the polyester fiber B is less than 1.0 dtex, it becomes difficult to hold the fine protrusions formed by the polyester fiber A on the surface portion of the mixed fiber entangled yarn, as described above. It becomes difficult to form an air retaining layer. Further, when the single yarn fineness of the polyester fiber A and the polyester fiber B is approximately the same, when the mixed entangled yarn is used as a woven or knitted fabric, the woven or knitted fabric becomes too soft and easily becomes a loose woven or knitted fabric without tension. Become. Such a woven or knitted fabric is not preferable as a woven or knitted fabric for clothing. On the other hand, when the single yarn fineness of the polyester fiber B exceeds 5.0 dtex, even when mixed with the polyester fiber A having the single yarn fineness in the above range, the entire woven or knitted fabric has a hard texture. Such a woven or knitted fabric is also not preferable as a woven or knitted fabric for clothing. Furthermore, the entangled state becomes worse, and it becomes difficult to form the fine protrusions as described above on the surface of the woven or knitted fabric, and it becomes difficult to impart high water repellency to the woven or knitted fabric.

  The mixed fiber entangled yarn of the present invention has a false twist crimp as a whole. In the mixed fiber entangled yarn of the present invention, the degree of false twist crimp, that is, the crimp rate is preferably about 10 to 45%, more preferably about 20 to 40%. When the mixed entangled yarn has an appropriate crimp rate, it becomes easy to form the fine protrusions as described above on the surface portion of the mixed entangled yarn. When the crimp rate of the mixed fiber entangled yarn is less than 10%, the crimp rate is low, so it is difficult to form the protruding portion as described above on the surface portion of the mixed fiber entangled yarn. Sometimes water repellency cannot be fully exhibited. On the other hand, if the crimp ratio of the mixed entangled yarn exceeds 45%, the stretch performance of the mixed tangled yarn is too strong, so that it is not suitable for a highly water-repellent woven or knitted fabric. That is, since a flat structure is obtained when the mixed fiber entangled yarn is stretched, it is difficult to maintain the protrusions as described above, and the water repellency is lowered.

  In the present invention, the crimp rate of the mixed fiber entangled yarn is a value obtained by measurement by the following method. First, using a measuring machine with a frame circumference of 1.125 m, the mixed entangled yarn is cut with 5 turns, and then the hook is hung on a stand in a free state at room temperature all day and night. Next, the load is put into boiling water while applying a load of 0.000147 cN / dtex to the casserole and subjected to wet heat treatment for 30 minutes. Thereafter, the casserole is taken out, the moisture is lightly removed with a filter paper, and left in a free state at room temperature for 30 minutes. Then, the load is applied with a load of 0.000147 cN / dtex and 0.00177 cN / dtex (light load), and the length X is measured. Subsequently, while applying a load of 0.000147 cN / dtex, a load (heavy load) of 0.044 cN / dtex is applied instead of a light heavy load, and the length Y is measured. Then, it calculates based on the formula of crimp rate (%) = (Y−X) / Y × 100. The crimp rate is measured for five mixed entangled yarns, and the average of each is taken as the crimp rate of the yarn.

  In the present invention, the mass ratio (A / B) between the polyester fiber A and the polyester fiber B is in the range of 20/80 to 80/20. When the mass ratio (mixing ratio) of the polyester fiber A is less than 20%, since the ratio of the polyester fiber A in the mixed fiber entangled yarn is too small, the above-described protruding portion may be formed on the surface portion of the mixed fiber entangled yarn. It becomes difficult to impart high water repellency to the woven or knitted fabric. On the other hand, when the mixing ratio of the polyester fiber A exceeds 80%, the ratio of the polyester fiber B is too small, and it becomes difficult to hold the protruding portion on the surface portion. For this reason, a fine protrusion part becomes easy to be crushed and it becomes difficult to provide high water-repellent performance to a woven or knitted fabric. The mass ratio (A / B) between the polyester fiber A and the polyester fiber B is preferably about 30/70 to 70/30.

  In the mixed fiber entangled yarn of the present invention, the whole yarn is mixed and entangled. The entanglement number of the mixed fiber entangled yarn is preferably about 90 to 150 pieces / m. When the number of entanglements is less than 90 / m, the entangled state is easily unraveled, and it may be difficult to form the fine protrusions as described above in the surface portion of the mixed fiber entangled yarn. In addition, when the entangled state becomes easy to be unraveled, the guide wear that is inevitably received in the manufacturing process of the woven or knitted fabric may cause a deviation in the yarn, which may easily induce a defect of the woven or knitted fabric. On the other hand, if the number of entanglements exceeds 150 / m, the polyester fiber A and the polyester fiber B are too entangled, the crimps disappear, and the above-mentioned protruding portions are hardly formed. It becomes difficult to give. In the present invention, the entanglement number of the mixed entangled yarn is a value obtained by measurement based on the JIS L1013 8.15 hook method.

  In the mixed fiber entangled yarn of the present invention, as described above, (1) the single yarn fineness of the two yarns of the polyester fiber A and the polyester fiber B is set in the specific range, and (2) the mixing ratio of the two yarns. Is set to the above specific range, (3) the two yarns are mixed, and (4) the mixed entangled yarn as a whole has false twist crimps. In the present invention, as a synergistic effect of these configurations, a fine protruding portion of the polyester fiber A is formed on the surface portion of the mixed fiber entangled yarn. And by such a protrusion part formed in the surface part of the mixed fiber entangled yarn, high water-repellent performance can be imparted to the woven or knitted fabric using the mixed fiber entangled yarn. Further, the water repellent performance is enhanced by the air retaining layer as described above. In other words, by using the mixed fiber entangled yarn of the present invention, the knitted or knitted fabric exhibits high water repellency only by using a conventionally known inexpensive fluorine-based water repellent, without specially designing the woven or knitted fabric. Can be made.

  Furthermore, in the mixed fiber entangled yarn of the present invention, by adding an appropriate additive to at least one of the polyester fiber A and the polyester fiber B, a secondary function is imparted to the mixed fiber entangled yarn. can do. In addition, although the functional fruit provided by use of an additive usually increases, so that the usage-amount (absolute amount) of an additive increases, the direction added to the polyester fiber B with a large single yarn fineness is rather than the polyester fiber A. Since many additives can be contained in the polyester fiber B, the additive is preferably contained in the polyester fiber B. Examples of such additives include sunlight blocking substances and infrared absorbing substances. An additive may be used individually by 1 type and may be used in combination of 2 or more types.

  When the mixed fiber entangled yarn of the present invention contains a sunlight shielding material, the cool feeling of the woven or knitted fabric can be enhanced. From the above viewpoint, in the mixed fiber entangled yarn of the present invention, it is preferable that the polyester fiber B includes a sunlight shielding substance. In the present invention, the sunlight shielding substance is not particularly limited as long as it is ceramic fine particles that do not transmit visible light or infrared rays of sunlight and can be dispersed in polyester. Well-known ones can be used. From the viewpoint of imparting a good cool feeling to the woven or knitted fabric, specific examples of preferable sunscreen materials include visible light such as simple substances such as titanium oxide, potassium titanate, zinc oxide, indium tin oxide, and mixtures thereof. And those that have low infrared absorption and high reflectivity. Moreover, as a sunlight shielding substance, you may use what coat | covered the surface of the appropriate particle | grains of these single-piece | units or a mixture. One type of sunlight shielding substance may be used alone, or two or more types may be used in combination.

  In the polyester fiber A or the polyester fiber B, the content of the sunlight shielding substance in the fiber is preferably about 3 to 10% by mass, more preferably about 3 to 7% by mass, respectively. In addition, when content of the sunlight shielding substance in a fiber is less than 3 mass%, it is difficult to obtain desired cool feeling. Moreover, when content in a fiber exceeds 10 mass%, it exists in the tendency for the spinnability of a fiber to fall. Moreover, a fiber cross section may be made into a concentric core-sheath type, and a difference may be provided in the quantity of the additive contained in a core part and a sheath part. For example, in the case of the above-described sunlight shielding material, the amount of the sunlight shielding material contained in the sheath is set to 0.8 mass% or less, and at the same time, the entire fiber contains about 3 to 10 mass% of the sunlight shielding material. It is good to do. By reducing the content of the sheath portion, it becomes difficult to receive guide wear in the composite false twisting process and the process of manufacturing the woven or knitted fabric, which will be described later, and yarn breakage and fluff are less likely to occur.

  Moreover, when the mixed fiber entangled yarn of the present invention contains an infrared absorbing material, the heat retention of the woven or knitted fabric can be improved. From the above viewpoint, in the mixed fiber entangled yarn of the present invention, it is preferable that the polyester fiber B includes an infrared absorbing substance. In the present invention, the infrared absorbing substance is not particularly limited as long as it is fine particles capable of converting absorbed infrared rays into heat and can be dispersed in polyester, and known substances can be used. From the viewpoint of imparting good heat retention to the woven or knitted fabric, specific examples of preferable infrared absorbing materials include zirconium carbide, silicon carbide, antimony-doped tin oxide, tin-doped indium oxide and the like. The infrared absorbing material may be used alone or in combination of two or more.

  In the polyester fiber A or the polyester fiber B, the content of the infrared absorbing substance in the fiber is preferably about 0.5 to 5% by mass, respectively. In addition, when content of the infrared rays absorption substance in a fiber is less than 0.5 mass%, desired heat retention is difficult to be obtained. On the other hand, if the content in the fiber exceeds 5% by mass, the spinnability of the fiber tends to decrease. Moreover, also when using an infrared rays absorption substance, a fiber cross section may be made into a concentric core sheath type | mold, and a difference may be provided in content in a core part and a sheath part. In this case, the amount of the infrared absorbing material contained in the core is preferably about 5 to 25% by mass, more preferably about 7 to 17% by mass, and at the same time the infrared absorbing material is about 0.5 to 5% by mass in the entire fiber. It should be included. By reducing the content of the sheath portion, it becomes difficult to receive guide wear in the composite false twisting process and the process of manufacturing the woven or knitted fabric, which will be described later, and yarn breakage and fluff are less likely to occur.

  In addition, even if it is a case where either a sunlight shielding substance or an infrared rays absorption substance is used, when a fiber cross section is made into a concentric core-sheath type, the core-sheath mass ratio (core / sheath) is 10 / 90-90 / A range of about 10 is preferable, and a range of about 20/80 to 80/20 is more preferable.

  In general, the fibers become stiff when they are thick, and they become supple when they are thin, but in the present invention, by utilizing such characteristics of the fibers, they are relatively thick in the composite false twisting process and the mixed fiber entanglement process described later. By allowing the relatively thin polyester fiber A to enter a large gap generated between the polyester fibers B, the polyester fiber A is projected from the surface portion of the mixed entangled yarn. That is, in the mixed fiber entangled yarn of the present invention, the polyester fiber A and the polyester fiber B constituting the mixed fiber entangled yarn have a single yarn latitude in the specific range, and the mixing ratio of these two types of fibers is The special surface structure as described above is formed due to the fact that the above-mentioned specific range is set, and that the interlaced yarn has a false twist crimp as a whole, which is excellent for woven and knitted fabrics. Water repellency can be imparted.

2. Manufacturing method of mixed fiber entangled yarn The mixed fiber entangled yarn of the present invention can be manufactured by a manufacturing method including the following steps.
Stretching step of stretching a highly oriented polyester yarn B having a single yarn fineness of 1.5 to 6.5 dtex and an elongation of 100 to 160% at a draw ratio of 1.1 to 1.4 times. Polyester stretched in the stretching step A highly oriented drawn yarn B and a polyester highly oriented undrawn yarn A having a single yarn fineness of 0.4 to 1.3 dtex and an elongation of 80 to 110% are processed at a processing speed of 100 to 700 m / min and a draw ratio of 1.10. A composite false twisting process in which a composite false twisting is performed under a condition of ~ 1.30 times. Using a fluid nozzle, the composite false twisting yarn obtained in the composite false twisting process has an air pressure of 0.1 to 0.6 Mpa and an overfeed rate of 1 to 1. Mixed fiber entanglement process in which mixed fiber is entangled under 4% condition

  In the method for producing the mixed fiber entangled yarn of the present invention, a stretching process is performed in which the polyester highly oriented unstretched yarn B (which becomes the polyester fiber B constituting the mixed fiber entangled yarn) is previously stretched at a specific draw ratio. Thereby, the elongation of the polyester highly oriented undrawn yarn A (which becomes the polyester fiber A constituting the mixed fiber entangled yarn) and the polyester highly oriented undrawn yarn B are substantially the same, or the polyester highly oriented undrawn yarn B Is slightly lower. Note that the higher the elongation, the longer the yarn length in the subsequent composite false twisting process. Thereafter, a composite false twisting step is performed in which the highly false oriented stretched polyester yarn B stretched in the stretch step and the highly oriented polyester yarn A which is the other end of the mixed fiber are stretched together and stretched while being compositely twisted. Get twisted yarn. In the composite false twisted yarn, the polyester highly oriented drawn yarn A is often arranged on the outer side (surface side). And the mixed fiber entanglement thread | yarn of this invention is obtained by performing the mixed fiber entanglement process which carries out the mixed fiber entanglement of the composite false twist yarn continuously. In the mixed fiber entangled yarn of the present invention thus manufactured, as described above, the polyester fiber A protrudes from the surface portion of the mixed fiber entangled yarn. Hereinafter, the manufacturing method of the mixed fiber entangled yarn of this invention is explained in full detail.

  In the production method of the present invention, first, a polyester highly oriented unstretched yarn A and a polyester highly oriented unstretched yarn B are prepared. By passing through each process of the manufacturing method of this invention, the polyester highly oriented undrawn thread | yarn A becomes said polyester fiber A which comprises the mixed fiber entanglement of this invention, and the polyester highly oriented undrawn thread | yarn B of this invention It becomes said polyester fiber B which comprises mixed fiber entanglement.

  Here, the polyester highly oriented undrawn yarn refers to a multifilament yarn wound by spinning a polyester polymer at a speed of about 2000 to 4000 m / min. As the polyester polymer, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, or the like can be used alone or in combination. The polyester polymer may be a copolyester. Examples of copolymer components include aromatic dicarboxylic acids such as isophthalic acid, 5-alkaliisophthalic acid, and 3,3′-diphenyldicarboxylic acid; aliphatic dicarboxylic acids such as adipic acid, sebacic acid, and succinic acid; diethylene glycol, 1,4 -Aliphatic or alicyclic diols such as butanediol and 1,4-cyclohexanediol; and copolymer components such as P-hydroxybenzoic acid. The polyester polymer may contain modifiers such as a matting agent, a stabilizer, a flame retardant, and a colorant as necessary. Polyester highly oriented undrawn yarn is composed of a bundle of a plurality of highly oriented unstretched fibers. For example, when the fiber cross section is a concentric core-sheath type, it is arranged in each of the core and sheath. In consideration of the compatibility of the polymers, it is preferable that both polyester polymers are the same.

  The polyester highly oriented undrawn yarn A preferably has a single yarn fineness of 0.4 to 1.3 dtex and an elongation of 80 to 110%. If the single yarn fineness of the polyester highly oriented non-stretched yarn A is less than 0.4 dtex, the single yarn is too thin and the opening effect is poor, and it is difficult to sufficiently mix with the polyester highly oriented unstretched yarn B described later. , Entanglement defects are likely to occur. As a result, the fine protrusions described above are not easily formed on the surface portion of the mixed fiber entangled yarn. Further, yarn breakage and fluff are likely to occur, which is not preferable. On the other hand, if the single yarn fineness of the polyester highly oriented unstretched yarn A exceeds 1.3 dtex, it is easy to form a large gap in the yarn, and it becomes difficult to sufficiently mix with the polyester highly oriented unstretched yarn B, resulting in poor entanglement. It tends to occur. As a result, the fine protrusions described above are not easily formed on the surface portion of the mixed fiber entangled yarn. As described above, when the single yarn fineness of the polyester highly oriented undrawn yarn A that is the raw material is out of the predetermined range, the fiber mixing is not sufficiently promoted in the subsequent process, and the fine protrusions described above are the mixed fiber entangled yarns. It becomes difficult to form on the surface portion, and it becomes difficult to impart desired water repellency to the woven or knitted fabric.

  When the degree of elongation of the polyester highly oriented undrawn yarn A is less than 80%, thread breakage may frequently occur in the composite false twisting step described later. On the other hand, even if it is intended to obtain a highly oriented undrawn yarn having an elongation exceeding 110%, yarn breakage, quality degradation, and the like occur at the time of manufacture, and stable supply becomes difficult.

  On the other hand, the polyester highly oriented undrawn yarn B preferably has a single yarn fineness of 1.5 to 6.5 dtex and an elongation of 100 to 160%. When the single yarn fineness of the polyester highly-oriented undrawn yarn B is less than 1.5 dtex, the protruding portion made of the polyester fiber A cannot be firmly held after becoming a mixed fiber entangled yarn, and the protruding portion is crushed. It becomes easy. In addition, since the entire yarn is thinned, the texture of the woven or knitted fabric is stretched and the waist feeling is poor. Moreover, when the single yarn fineness exceeds 6.5 dtex, the entangled state becomes worse. Further, the texture of the woven or knitted fabric is not preferred because it has a lack of appropriate swell and only a hard texture can be obtained.

  Further, when the elongation of the polyester highly oriented undrawn yarn B is less than 100%, the polyester fiber A and the polyester fiber B constituting the mixed fiber entangled yarn have substantially the same length, and the above-described protrusion is the mixed fiber entangled yarn. It may be difficult to form on the surface portion of. In the composite false twisted yarn in the present invention, since the polyester fiber A is longer than the polyester fiber B, a large amount of the polyester fiber A is arranged on the surface side. For this reason, it becomes easy to form the protrusion part mentioned above in the surface part of a mixed fiber entanglement yarn. On the other hand, when the elongation exceeds 160%, the elongation of the entangled yarn becomes too high and the dimensions of the woven or knitted fabric easily change, which is not preferable from the viewpoint of quality stability.

  In addition, when the above-mentioned additive is added to the mixed fiber entangled yarn of the present invention, the above-mentioned additive is contained in the polyester highly oriented unstretched yarn A or the polyester highly oriented unstretched yarn B. However, since the preferred spinning conditions generally vary depending on the type of additive, the yarn quality of the polyester highly oriented undrawn yarn B obtained by these preferred spinning conditions will also vary somewhat. For example, the elongation when the polyester highly-oriented undrawn yarn B contains a sunlight shielding material is preferably about 130 to 160%, and when the infrared absorbing material is contained, preferably 100 to 150%. Degree.

  Next, a method for producing the mixed fiber entangled yarn of the present invention will be described in detail with reference to the schematic diagram of FIG. First, the packages YA and YB of the polyester highly-oriented undrawn yarns A and B are each set on a creel. Next, the polyester highly oriented undrawn yarn B is introduced into the supply roller 1. And the extending | stretching process of extending | stretching the polyester highly oriented undrawn yarn B between the supply roller 1 and the 1st take-off roller 2 is performed. That is, the polyester highly oriented undrawn yarn B having a single yarn fineness of 1.5 to 6.5 dtex and an elongation of 100 to 160% is drawn at a draw ratio of 1.1 to 1.4.

  In the stretching step, the stretching ratio is preferably about 1.1 to 1.4 times. Thereby, the elongation of the polyester highly oriented unstretched yarn A and the polyester highly oriented unstretched yarns A and B are substantially the same, or the elongation of the polyester highly oriented unstretched yarn A is slightly higher. Here, the draw ratio in the drawing step is the ratio of the surface speed of the supply roller 1 to the surface speed of the first take-up roller 2 (draw ratio = surface speed of the first take-up roller 2 / surface speed of the supply roller 1). Say. The higher the elongation, the longer the yarn length in the subsequent composite false twisting process, and the longer the fiber length is more likely to be arranged on the outer side (surface side) of the mixed entangled yarn. As a result, as described above, it becomes easy to form the protruding portion of the polyester fiber A on the surface of the mixed fiber entangled yarn. Moreover, the said protrusion part protrudes from the part in which the polyester fiber A formed in the surface part of the mixed fiber entanglement yarn loosely entangled. In addition, by stretching the polyester highly oriented undrawn yarn B, the fineness of the single yarn can be finely adjusted to a more preferable one, and the mixing ratio of the polyester highly oriented undrawn yarns A and B can be finely adjusted to a more preferable one. it can. The highly oriented polyester yarn B may be stretched at room temperature, or may be performed while applying heat by installing a heater or the like.

  When the draw ratio of the polyester highly oriented unstretched yarn B is less than 1.1 times, the elongation of the entire mixed fiber entangled yarn becomes high, particularly when used for textiles, post-processing (for example, after the weaving step, In a series of processing including dyeing processing), the physical properties of the mixed entangled yarn are likely to fluctuate due to the tension that is inevitably applied, which may cause trouble in terms of quality of the woven or knitted fabric. On the other hand, if the draw ratio exceeds 1.4, the yarn length of the polyester fiber A tends to be too long compared to the polyester fiber B in the subsequent composite false twisting step, and the yarn breakage in the composite false twisting step Is likely to occur frequently.

  Next, a composite false twisting step of composite false twisting the polyester highly oriented undrawn yarn B after stretching and the polyester highly oriented undrawn yarn A described above under a predetermined condition is performed. That is, the polyester highly oriented drawn yarn B drawn in the drawing step and the polyester highly oriented undrawn yarn A having a single yarn fineness of 0.4 to 1.3 dtex and an elongation of 80 to 110% are processed at a processing speed of 100. Composite false twisting is performed under conditions of ˜700 m / min and a draw ratio of 1.10 to 1.30. Specifically, as shown in FIG. 2, the polyester highly oriented stretched yarn B and the polyester highly oriented unstretched yarn A stretched as described above are simultaneously introduced into the first take-up roller 2, and the heater 3, false twisting tool 4, the composite false twisted yarn C is obtained by pulling it out from the second take-up roller 5. Here, a space between the first take-up roller 2 and the second take-up roller 5 in FIG. 2 is a composite false twist region. Specifically, the twisting zone T1 is between the first take-up roller 2 and the false twisting tool 4, and the untwisting zone T2 is between the false twisting tool 4 and the second take-up roller 5.

  In the composite false twisting step, it is preferable to specify the processing speed and the draw ratio. The processing speed refers to the yarn speed when the yarn is pulled out from the second take-up roller 5, that is, the surface speed of the second take-up roller 5. The processing speed (yarn speed) is preferably about 100 to 700 m / min as described above. When the yarn speed is below the above range, the crimp of the composite false twisted yarn C tends to be too strong. If the crimp becomes strong, the stretch performance is strongly expressed, so it is not suitable for producing a highly water-repellent woven fabric. Moreover, when the stretch performance of the composite false twisted yarn C becomes strong, the stretch performance of the mixed fiber entangled yarn obtained later also becomes strong, and the mixed fiber entangled yarn is easily stretched. When the mixed fiber entangled yarn is stretched, the mixed fiber entangled yarn becomes a flat shape, and the fine protrusions on the surface of the mixed fiber entangled yarn are lost. For this reason, when the yarn speed falls below the above range and the crimp becomes strong, it becomes difficult to impart desired water repellency to the woven or knitted fabric. On the other hand, when the yarn speed exceeds the above range, the crimp of the composite false twisted yarn C tends to be weakened. When the crimp is weakened, sufficient crimp is not applied to the polyester fiber, and the shape of the polyester fiber becomes nearly flat. Therefore, it is difficult for the polyester fiber A to be formed on the surface portion of the mixed entangled yarn. Therefore, it becomes difficult to impart desired water repellency to the woven or knitted fabric.

  In the composite false twisting step, the draw ratio is preferably in the range of about 1.10 to 1.30 times. The draw ratio in the composite false twisting process is the ratio between the surface speed of the first take-up roller 2 and the surface speed of the second take-up roller 5 (draw ratio = surface speed of the second take-up roller 5 / the surface of the first take-up roller 2). Speed). If the draw ratio is less than 1.10 times, the yarn length of the polyester fiber A cannot be made appropriately longer than that of the polyester fiber B, and the quality stabilization of the composite false twisted yarn C becomes difficult. On the other hand, if the draw ratio exceeds 1.30 times, fluff and yarn breakage frequently occur in the composite false twisting process, which is not preferable. In the present invention, in the composite false twisted yarn C, the yarn length of the polyester fiber A is preferably longer than the yarn length of the polyester fiber B by about 5% or less, more preferably about 1 to 4%. If the polyester fiber A exceeds 5% and the polyester fiber B is longer than 5%, the bulkiness of the composite false twisted yarn is increased, and consequently the protruding portion is enlarged, and the water repellency is lowered, which is not preferable.

  In the composite false twisting step, the above-described highly oriented polyester yarn B after stretching and the above highly oriented polyester yarn A are preferably stretched with an appropriate false twisting tool, preferably under a predetermined processing speed and a predetermined draw ratio. Composite false twist. Generally, the false twisting method is roughly classified into a spindle method and a friction method. In the present invention, any of these methods can be adopted. Generally, as the false twisting tool 4, a pin type is used in the case of the spindle method, and a disk type is used in the case of the friction method.

  The preferred false twisting conditions differ slightly between the spindle method and the friction method. For example, the yarn speed is preferably about 100 to 200 m / min for the spindle method and about 200 to 700 m / min for the friction method.

  The heater temperature is preferably about 150 to 200 ° C. in the spindle system. On the other hand, in the friction system, the range of about 170 to 200 ° C. for the contact heater and the range of about 200 to 300 ° C. for the point contact heater are preferable. When the heater temperature is lower than the above range, it is difficult to impart sufficient crimps in any method, and when the heater temperature is higher than the above range, fibers are easily fused with each other, Will not open sufficiently, making it difficult to mix later.

Furthermore, the twisting and untwisting mechanisms are slightly different between the spindle method and the friction method. In the spindle system, the pin-type false twisting tool 4 is rotated by the rotation of the spindle, and the yarn is twisted. The degree of twisting at this time, that is, the false twisting coefficient is preferably 20000 to 34000, more preferably 22000 to 30000. The false twist coefficient is calculated by the equation K = T × D ^1/2 . In the formula, K is a false twist coefficient, T is the number of false twists (T / M), and D is the total fineness (dtex) of the composite false twist yarn. The number of false twists is calculated by T = spindle rotation speed (rpm) / surface speed of the second take-up roller 5 (m / min). When the false twisting coefficient is less than 20000, the crimp becomes weak and it becomes difficult to impart sufficient crimp to the polyester fiber A and the polyester fiber B constituting the composite false twisted yarn. For this reason, it becomes difficult to form the above-mentioned fine protrusion part in the surface part of the mixed fiber entangled yarn. On the other hand, when the false twisting coefficient exceeds 30000, the crimp shape becomes too dense, and the above-described air retention layer on the surface portion of the mixed entangled yarn is hardly formed.

  On the other hand, in the friction system, generally, the degree of twisting is not managed by the false twisting coefficient, but by the K value and the number of disks. This is due to the difference between both types of twisting and untwisting mechanisms. K value means the ratio (F2 / F1) of untwisting tension (F2) and twisting tension (F1). F2 is the yarn tension immediately after passing through the disk, and F1 is introduced into the disk. The last thread tension. In the friction system, twist is applied by the rotation of the disk. Therefore, the degree of twisting is determined by the disk speed and the number of disks. However, since managing the disk speed directly is not very efficient in process management, it is generally efficient to manage the K value in view of the fact that the K value fluctuates due to fluctuations in the disk speed. It is said that there is.

  In the friction system, a disk made of polyurethane is generally used. In general, the number of disks is preferably 5 to 7, and the thickness of the disk is preferably 5 to 10 mm. Moreover, as K value, 0.6-1.2 are preferable. When the K value is less than 0.6, in addition to an increase in yarn breakage, there may be a composite false twisted yarn with a lot of fluff. On the other hand, if it exceeds 1.2, surging tends to occur. Surging refers to a state in which the twisted twist is not unwound in the untwisted region and the twist remains.

  After the composite false twisting process, the composite false twisted yarn C is guided to the fluid nozzle 6 by the second take-up roller 5 and is mixed and entangled using the fluid nozzle 6. That is, the composite false twisted yarn obtained in the composite false twisting process is mixed and entangled using a fluid nozzle under the conditions of an air pressure of 0.1 to 0.6 Mpa and an overfeed rate of 1 to 4%.

  Although it does not specifically limit as a fluid nozzle, Generally an interlace nozzle is suitable. As the conditions for the mixed fiber entanglement, as described above, the air pressure is preferably set to about 0.1 to 0.6 Mpa, and the overfeed rate is preferably set to about 1 to 4%. The overfeed rate is defined as V1 when the yarn speed immediately before being introduced into the fluid nozzle is V1, and V2 when the yarn speed immediately after passing through the fluid nozzle is V2 = 100 (%). It is calculated by the following formula. In the case of FIG. 2, the overfeed rate = (surface speed of the second take-up roller 5−surface speed of the third take-up roller 7) / surface speed of the third take-up roller 7 × 100 (%). Since many polyester fibers A are arranged on the outer side of the composite false twisted yarn C, the above-mentioned air retention layer with a protruding portion of the polyester fibers A is formed by mingling the polyester fibers A under predetermined conditions. When the condition of the mixed fiber entanglement is out of the above range, the protruding portion due to the polyester fiber A does not have an appropriate size, and the air retaining layer as described above is hardly formed on the surface portion of the mixed fiber entangled yarn. .

  After passing through the third take-up roller 7, the mixed fiber entangled yarn is wound around the package 9 by the take-up roller 8. In the mixed fiber entangled yarn of the present invention, it can be said that, as a guide, when the number of entanglement is in the range of about 90 to 150 / m, it has an appropriate mixed fiber entanglement. Further, in addition to the number of entanglements, it is preferable that the crimp change rate satisfies a predetermined range as a guide for appropriate mixed fiber entanglement. That is, when the yarn is mixed and entangled, the fibers are entangled and the crimp rate of the entire yarn is reduced. Therefore, by knowing how much the crimp rate is reduced, an appropriate standard for mixed and entangled yarn can be obtained. . In the present invention, the crimp change rate is preferably in the range of 40 to 70%. The crimp change rate is calculated by the following formula: crimp change rate = (crimp rate of the obtained mixed-entangled yarn) / (crimp rate of the composite false twisted yarn C) × 100 (%).

  In the present invention, when the crimp change rate is less than 40%, the entangled state becomes strong, the above-mentioned fine protrusions are hardly obtained, and it becomes difficult to impart high water repellency to the woven or knitted fabric. Further, when the crimp change rate exceeds 70%, the entangled state is easily unraveled, so that the inside of the yarn is displaced and the above-mentioned fine protrusions are hardly obtained.

3. Woven knitted fabric The woven or knitted fabric of the present invention is a woven or knitted fabric using the above-mentioned mixed fiber entangled yarn, and by using a conventionally known inexpensive fluorine-based water repellent, etc., without specially devising the structure of the woven or knitted fabric, High water repellency can be demonstrated. Hereinafter, a preferred woven or knitted fabric of the present invention will be described in detail.

  As described above, the mixed entangled yarn constituting the woven or knitted fabric of the present invention has the protruding portion of the polyester fiber A formed on the surface portion thereof. The protruding portion of the entangled yarn is located on the surface portion. Therefore, in the woven or knitted fabric of the present invention, not only large water droplets but also small water droplets can be supported by the protrusions, and the water droplets are effectively transferred to the inside of the woven or knitted fabric due to the presence of the air retaining layer. Since it can be suppressed, the water repellent performance similar to the so-called Lotus effect is remarkably improved.

  In order to know how fine the protrusions formed on the surface portion of the woven or knitted fabric of the present invention can be evaluated by measuring the average deviation (SMD) of the woven or knitted surface roughness by the KES-F system. . In the woven or knitted fabric of the present invention, the average deviation (SMD) of the surface roughness of the fabric by the KES-F system is preferably in the range of 3.0 to 8.0 μm. When the average deviation (SMD) is less than 3.0 μm, the protruding portion becomes too fine, but rather close to a flat shape. If it does so, the contact area of a water droplet and the surface of a woven / knitted fabric will become large, and it will become difficult for sufficient surface tension to act on a water droplet. As a result, high water repellency is hardly exhibited in the woven or knitted fabric. On the other hand, when the average deviation (SMD) exceeds 8.0 μm, the protrusions become too large and easily fall between the protrusions. As a result, water droplets easily move into the woven or knitted fabric, and the desired water-repellent performance is hardly exhibited. In the woven or knitted fabric of the present invention, the average deviation (SMD) can be set within a predetermined range by including 50% by mass or more of the mixed fiber entangled yarn of the present invention in the woven or knitted fabric.

  As described above, in the woven or knitted fabric of the present invention, the surface structure of the mixed fiber entangled yarn constituting the woven or knitted fabric is characterized by improving the water repellency of the woven or knitted fabric. Excellent water repellency can also be exhibited by using an inexpensive fluorine-based water repellent. Therefore, in the woven or knitted fabric of the present invention, the composition of the water repellent used for the water repellent finish is not particularly limited.

  As the water repellent used in the woven or knitted fabric of the present invention, a fluorine-based water repellent is preferable from the viewpoint of workability and price. Specifically, a fluorine-based water repellent composed of a fluorine-based compound having a polyfluoroalkyl group (Rf group) in the chemical structure is suitable. The Rf group refers to a group in which two or more hydrogen atoms of an alkyl group are substituted with fluorine atoms. The Rf group preferably has 2 to 20 carbon atoms. The Rf group may have a straight chain structure or a branched chain structure. Particularly in the case of a branched chain structure, it is preferable that the branched chain portion is present at the terminal portion of the Rf group and is a short chain having about 1 to 8 carbon atoms. The Rf group is preferably a group (perfluoroalkyl group) in which all hydrogen atoms of the alkyl group are substituted with fluorine atoms.

  As the fluorine-based compound, a copolymer obtained by polymerizing the polymer containing the perfluoroalkyl group and another polymerizable monomer capable of being polymerized by a known polymerization method can be preferably used. Examples of other polymerizable monomers include acrylic acid, methacrylic acid, styrene, and vinyl chloride. Moreover, you may mix suitably an acrylic compound, a vinyl acetate type compound, a melamine type compound etc. as needed.

  In the woven or knitted fabric of the present invention, commercially available products can be used as the fluorine-based water repellent. Examples of commercially available products include “Asahi Guard (trade name)” manufactured by Asahi Glass Co., Ltd. and “NK” manufactured by Nikka Chemical Co., Ltd. Guard (product name) ". As the fluorine-based water repellent, a fluorine-based water repellent containing no perfluoroalkyl acid is particularly preferable from the viewpoint of environmental protection. The fluorinated water repellent is preferably used in the form of an aqueous emulsion.

  Further, in the woven or knitted fabric of the present invention, the surface structure of the mixed entangled yarn constituting the woven or knitted fabric is characterized by improving the water repellency of the woven or knitted fabric, so that The design may be basically anything, but from the viewpoint of exhibiting higher water repellency, the cover factor (CF) of the woven or knitted fabric is preferably in the range of about 1500 to 3000, more preferably about 1800 to 2800. Set. When the cover factor (CF) is less than 1500, a woven or knitted fabric with a coarse texture point is formed, and voids increase in the woven or knitted fabric. As a result, water droplets tend to fall into the voids, so that improvement in water repellency cannot be expected. On the other hand, when the cover factor (CF) exceeds 3000, the restraint caused by the texture point becomes stronger, so that the fine protrusions on the surface portion of the above-mentioned mixed fiber entangled yarn tend to be lost, and improvement in water repellency is expected. become unable.

Here, the cover factor (CF) of the woven / knitted fabric is a numerical value of the density of the woven / knitted fabric, and is calculated by the following equation.
CF = D ^1/2 × warp density (w ^/ 2.54cm) + E ^1/2 × weft density (w ^/ 2.54cm)
[In formula, D shows the total fineness of a warp. E indicates the total fineness of the weft. ]

  Moreover, it does not specifically limit as a structure | tissue of a woven / knitted fabric, You may employ | adopt an appropriate structure | tissue. Usually, plain weave, twill weave, and satin weave are preferred, and a multiple structure may be adopted as necessary.

  Although the woven or knitted fabric of the present invention has excellent water repellency, specifically, the water droplet rolling angle is preferably 15 degrees or less. The water droplet rolling angle is an index for evaluating the superiority or inferiority of water repellency such as the Lotus effect, and the excellent water repellency in the present invention is synonymous with having a high Lotus effect. The water droplet rolling angle is the angle at which 0.2 mL of water is gently dripped onto a horizontal sample (woven or knitted fabric) mounted on the horizontal plate, and then the horizontal plate is gently tilted, and the angle at which the water droplet begins to roll. Say. When the water droplet rolling angle exceeds 15 degrees, when a woven or knitted fabric is actually sewn and used as a product, it may be difficult to shake off water droplets from rainwater or the like without destroying the water droplet shape. For example, when the mixed entangled yarn is contained in the woven or knitted fabric of the present invention in an amount of 50% by mass or more and the cover factor (CF) is set in the above range, the water droplet rolling angle can be easily set to 15 degrees or less. can do.

4). Manufacturing method of woven or knitted fabric The woven or knitted fabric of the present invention can be obtained by weaving and knitting the above mixed fiber entangled yarn to obtain a living machine, and then subjecting it to post-processing and water-repellent processing. Weaving and knitting may be performed using a known loom or knitting machine, and the preparation process prior to weaving and knitting may be performed using known equipment.

  In post-processing, the raw machine is first refined and relaxed. Scouring / relaxing may be performed at a temperature of 80 to 130 ° C. by a continuous method or a batch method. Usually, it is preferably carried out by a batch system at 100 ° C. or less, and particularly preferably carried out using a high-pressure liquid flow dyeing machine equipped with a jet nozzle.

  After scouring and relaxing, pre-set the woven or knitted fabric. The preset is usually subjected to a dry heat treatment at 170 to 200 ° C. for 30 to 120 seconds using a pin tenter. After pre-setting, dyeing is performed based on a conventional method, and then final setting is performed as necessary.

  After post-processing, the woven or knitted fabric is water-repellent. In the water repellent process, first, an aqueous solution containing a water repellent is prepared. Next, based on the padding method, spray method, kiss roll coater method, slit coater method or the like, the aqueous solution may be applied to the woven or knitted fabric after the post-processing, and dry heat treatment may be performed at 105 to 190 ° C. for 30 to 150 seconds. The aqueous solution may contain a crosslinking agent, a softening agent, an antistatic agent and the like as necessary. After the water repellent finish, the woven or knitted fabric may be calendered to further improve the water repellent performance.

  Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples. However, the present invention is not limited to the examples.

  In Examples and Comparative Examples, 1. 1. Surface shape of mixed entangled yarn 2. single yarn latitude and total fineness of highly oriented undrawn yarn and mixed entangled yarn; 3. Crimp rate, 4. Elongation of highly oriented undrawn yarn, 5. Number of entanglement of mixed tangled yarn, 6. Yarn length difference of composite false twist yarn, 7. Average deviation (SMD) of fabric surface roughness, 8. Water repellency of fabric (waterdrop rolling angle), 10. Cool feeling of the fabric The heat retention of the woven fabric was measured and evaluated by the following methods. These measurements and evaluation results in Examples and Comparative Examples are shown in Table 1.

1. Surface shape of mixed entangled yarn Using a microscope ("Microscope VHX-900" manufactured by Keyence Corporation), the surface shape of the mixed entangled yarn is observed 200 times in a free state, and the protruding portion by polyester fiber A And a layered portion in which the polyester fiber A is gently entangled in the surface portion of the mixed entangled yarn and air is easily retained (the function of making it difficult for water droplets to move inside the mixed tangled yarn) The case where the air retaining layer was formed was evaluated as “good”, and the case where it was not evaluated as “bad”. FIG. 1 is an optical micrograph of the surface portion of the mixed fiber entangled yarn obtained in Example 1.

2. Single yarn latitude and total fineness of highly oriented undrawn yarn and mixed entangled yarn, single yarn latitude and total fineness of highly oriented undrawn yarn and mixed tangled yarn are based on the provisions of JIS L1013 8.3.1, respectively. It was measured.

3. Crimp rate First, a sample is cut out with 5 turns using a measuring machine with a frame circumference of 1.125 m, and then the hook is hung on a stand in a free state at room temperature all day and night. Next, the load is put into boiling water while applying a load of 0.000147 cN / dtex to the casserole and subjected to wet heat treatment for 30 minutes. Thereafter, the casserole is taken out, the moisture is lightly removed with a filter paper, and left in a free state at room temperature for 30 minutes. Then, the load is applied with a load of 0.000147 cN / dtex and 0.00177 cN / dex (light heavy load), and the length X is measured. Subsequently, while applying a load of 0.000147 cN / dtex, a load (heavy load) of 0.044 cN / dtex is applied instead of a light heavy load, and the length Y is measured. Then, it calculates based on the formula of crimp rate (%) = (Y−X) / Y × 100. The crimp rate is measured for each of the composite false twisted yarn and the mixed fiber entangled yarn, and the average of each is taken as the crimp rate of the yarn.

4). Elongation of highly oriented undrawn yarn The elongation of the highly oriented undrawn yarn was measured based on JIS L1013 8.5.1.

5. The number of entangled yarns of mixed entangled yarn (number / m) was measured based on the JIS L1013 8.15 hook method.

6). In the process of obtaining the mixed tangled yarn, the composite false twist yarn is separately collected in the process of obtaining the composite false twist yarn, and the composite false twist yarn is hung on a vertical table equipped with a ruler while applying a load of 0.1 g / dtex, and the distance between 1 m above and below Mark two places with black magic. Next, while fixing the position of the upper mark, the composite false twisted yarn is carefully divided into a fiber group of polyester fiber A and a fiber group of polyester B with tweezers. Thereafter, a load of 0.1 g / dtex is applied to each of the fiber groups of polyester fibers A and B, and the length of each fiber group is measured. Thereafter, the yarn length difference (%) = (the length of the polyester A fiber group−the length of the polyester B fiber group) / the length of the polyester B fiber group × 100 is calculated. The measurement of the yarn length difference was performed on five composite false twisted yarns, and the average was taken as the yarn length difference.

7). Average deviation of surface roughness of fabric (SMD)
SMD was measured using an automated surface testing machine (“KESFB4-AUTO-A” manufactured by Kato Tech Co., Ltd.). First, a 20 cm square test piece was collected, and a test piece applied with 400 g of tension was placed in the test machine. Next, a vertical load of 50 g including the metal friction element is applied, the friction element is brought into contact with a force of 10 g by the contact pressure of the spring, the test piece is moved back and forth by 30 mm, and the surface roughness of the test piece is measured. Variation was measured. The measurement is performed three times each in two directions of WARP and WEFT, and the average value is taken as SMD. SMD shows the fluctuation | variation of surface roughness, and it can determine with there being an unevenness | corrugation by a protrusion part, so that a value is large.

8). Water repellent performance of fabric (water droplet rolling angle)
As for the water drop rolling angle, 0.2 mL of water was gently dropped onto a horizontal sample (textile) mounted on the horizontal plate, and then the horizontal plate was gently tilted to measure the angle at which the water droplets started to roll. .

9. Two of 10cm square window expanded polystyrene insulation board of coolness of 10mm thick fabric provided close the window back in black body cloth respectively, each temperature sensor blackbody fabric back center (temperature measuring instrument: Anrin Co. “DATA COLLECTOR”). Thereafter, the front side of one window is closed with a measurement sample (textile), and the front side of the other window is closed with a comparative sample. The comparative sample is a sample obtained in the same manner as the measurement sample except that no sunlight shielding material was used. Next, the heat insulation board is placed horizontally with the measurement sample facing up, and a lamp (manufactured by Panasonic Corporation, indoor reflex lamp 100 type 100V90W specification) is installed at a position about 25 cm above the sample. And the temperature of the black body cloth at the time of light irradiation for 2 minutes is measured. The number of measurements is 3 times, and the average is the black body cloth temperature. Coolness is generally judged to be good when the temperature of the black body cloth is below 37 ° C. Therefore, the case where the temperature of the black body cloth is less than 37 ° C. is evaluated as “◯”, and the case where the temperature is 37 ° C. or more is evaluated as “X”.

10. Heat retention of woven fabric Two 10 cm square windows are provided on a foamed polystyrene board having a thickness of 10 mm, one window is closed from the front side with a measurement sample (woven fabric), and the other window is covered with a comparative sample. The comparative sample is a sample obtained in the same manner as the measurement sample except that no infrared absorbing material was used. The board was tilted so that sunlight would shine directly on both samples outdoors at an illuminance of 100,000 LUX and an air temperature of 20 ° C., and an infrared thermal imaging device “Thermo Tracer TH7102 (trade name)” manufactured by NEC Sanei Co., Ltd. from the back of the board. Use to measure temperature until the temperature of both samples reaches equilibrium. The test is performed three times, and the heat retention is evaluated at the average equilibrium temperature. The heat retention is evaluated by the difference between the average equilibrium temperature of the measurement sample and the average equilibrium temperature of the comparative sample. The temperature of the measurement sample is preferably 3 ° C. or more higher than the temperature of the comparative sample, and more preferably 4 to 6 ° C.

Example 1
A polyester highly oriented undrawn yarn A having an elongation of 92%, a single yarn fineness of 0.54 dtex, and a total fineness of 90 dtex168f was prepared. On the other hand, the fiber cross section is a concentric core-sheath type, the mass ratio (core / sheath) is 75/25, and contains 5% by mass of titanium oxide as a solar light shielding substance in the core and 0.3% by mass in the sheath. In addition, a polyester highly oriented unstretched yarn B having a degree of elongation of 147%, a single yarn fineness of 2.7 dtex, and a total fineness of 130 dtex48f, which is composed of highly oriented unstretched fibers containing 3.825% by mass of titanium oxide in the entire fiber is prepared. did. Then, the polyester highly oriented undrawn yarns A and B were subjected to a method for producing a mixed fiber entangled yarn as shown in FIG. A disk type thing was used as the false twisting tool 4, and the mixed false entanglement yarn of 163dtex 216f was obtained by making the composite false twist condition and the mixed fiber entanglement condition as follows.

<Composite false twist conditions>
Surface speed of supply roller 1: 339 m / min Stretch ratio of polyester highly oriented undrawn yarn B: 1.25 times Surface speed of first take-up roller 2: 423.7 m / min Temperature of heater 3 (contact heater) 190 ℃
Twisting direction: Z-direction disk structure: 1-6-1
Disc thickness: 9mm
K value: 1.0
Stretch ratio at false twist: 1.18 times Surface speed of second take-up roller 5: 500 m / min

<Mixed fiber entanglement conditions>
Fluid nozzle 6: Interlace nozzle Air pressure: 0.1961 MPa
Overfeed rate: 2.5%
Surface speed of third take-up roller 7: 487.8 m / min

  Next, using a water jet loom (manufactured by Tsudakoma Kogyo Co., Ltd.), the polyester false twisted yarn of 84 dtex36f is used as the warp, and the mixed entangled yarn obtained above is arranged in the untwisted state as the weft. A plain machine with a warp density of 125 / 2.54 cm and a weft density of 66 / 2.54 cm was woven. Then, the raw machine was scoured at 95 ° C. using a BOILOFF scouring machine (Fukushin Kogyo Co., Ltd.), and then relaxed using a continuous relaxer machine (Wakayama Tekko Co., Ltd.). The fabric was then dried at 130 ° C. and preset at 190 ° C. for 30 seconds.

Next, after preparing the dyeing liquid of the composition shown in the following prescription 1, the textile was dyed at 130 ° C. for 40 minutes using this dyeing liquid. Then, it dried at 130 degreeC using the shrink surfer type dryer (made by Hirano Tech Seed Co., Ltd.).
<Prescription 1>
Dye: manufactured by Dystar Japan, disperse dye "Dianix Blue UN-SE (trade name)" 2% omf
Dispersant: “Nikka Sun Salt SN-250E (trade name)” by Nikka Chemical Co., Ltd. 0.5 g / L
Acetic acid (98%) 0.1 mL / L

Furthermore, after preparing the aqueous solution of the composition shown in the following prescription 2, the aqueous solution was applied to the woven fabric at a drawing ratio of 80% using a putter processing machine, and dry heat-treated at 120 ° C. for 120 seconds. Then, after final setting at 180 ° C. for 30 seconds, calendar processing was performed at 160 ° C. The obtained woven fabric had a warp density of 143 pieces / 2.54 cm, a weft density of 74 pieces / 2.54 cm, and a cover factor (CF) of 2255.
<Prescription 2>
Water repellent: “NK Guard S-07 (trade name) 20 mass% solid content” manufactured by Nikka Chemical Co., Ltd. 50 g / L
Crosslinking agent: manufactured by DIC Corporation, melamine resin “Beccamin M-3 (trade name)” 3 g / L
Catalyst: DIC Corporation “Catalyst ACX (trade name) solid content 35% by mass” 3 g / L

(Example 2)
As in the case of Example 1, 245 dtex 384f was used except that a polyester highly oriented undrawn yarn having an elongation of 92%, a single yarn fineness of 0.54 dtex, and a total fineness of 180 dtex 336f was used as the polyester highly oriented undrawn yarn A. A mixed fiber entangled yarn was obtained. Next, using a water jet loom (manufactured by Tsudakoma Kogyo Co., Ltd.), the above-mentioned mixed fiber entangled yarn is arranged in a non-twisted state on the warp, and the warp density is 78 yarns / 2.54 cm, and the weft yarn density is 50 yarns / 2. A weaving machine with a .54 cm twill structure was woven. Thereafter, post-processing and water-repellent processing were performed in the same manner as in Example 1 to obtain a woven fabric having a warp density of 83 / 2.54 cm, a weft density of 56 / 2.54 cm, and a cover factor (CF) of 2176.

(Example 3)
Using a water jet loom (manufactured by Tsuda Koma Kogyo Co., Ltd.), arranging a polyester false twisted yarn of 110 dtex 45f as the warp and the mixed entangled yarn of Example 1 in a non-twisted state as the weft, and having a warp density of 56 A plain machine with a /2.54 cm and weft density of 56 / 2.54 cm was woven. Thereafter, post-processing and water-repellent processing were performed in the same manner as in Example 1 to obtain a woven fabric having a warp density of 60 / 2.54 cm, a weft density of 62 / 2.54 cm, and a cover factor (CF) of 1420.

(Comparative Example 1)
In the same manner as in Example 1, except that a polyester highly oriented undrawn yarn having an elongation of 92%, a single yarn fineness of 2.5 dtex, and a total fineness of 90 dtex36f was used as the polyester highly oriented undrawn yarn A, a mixture of 164 dtex84f was used. A tangled yarn was obtained. Thereafter, weaving, post-processing and water-repellent processing were performed in the same manner as in Example 1 to obtain a woven fabric having a warp density of 143 / 2.54 cm, a weft density of 74 / 2.54 cm, and a cover factor (CF) of 2258. It was.

(Comparative Example 2)
As the polyester highly oriented non-drawn yarn B, the fiber cross section is a concentric core-sheath type and the mass ratio (core / sheath) is 75/25. Each of 0.3 parts by mass and composed of highly oriented unstretched fibers containing 3.825% by mass of titanium oxide as a whole, has an elongation of 147%, a single yarn fineness of 1.2 dtex, and a total fineness of 130 dtex110f. A mixed fiber entangled yarn of 163 dtex 278f was obtained in the same manner as in Example 1 except that the polyester highly oriented undrawn yarn was used. Thereafter, weaving, post-processing and water-repellent processing were performed in the same manner as in Example 1 to obtain a woven fabric having a warp density of 143 / 2.54 cm, a weft density of 74 / 2.54 cm, and a cover factor (CF) of 2255. It was.

(Comparative Example 3)
As the polyester highly oriented non-drawn yarn B, the fiber cross section is a concentric core-sheath type and the mass ratio (core / sheath) is 75/25. Each of 0.3 parts by mass and composed of highly oriented unstretched fibers containing 3.825% by mass of titanium oxide as a whole, has an elongation of 147%, a single yarn fineness of 7.8 dtex, and a total fineness of 280 dtex36f. Except that a polyester highly oriented undrawn yarn was used, the same procedure as in Example 1 was performed to obtain a 266 dtex 204f mixed fiber entangled yarn. Next, using a water jet loom (manufactured by Tsudakoma Kogyo Co., Ltd.), the above-mentioned mixed tangled yarn is arranged in a non-twisted state on the warp and the warp density is 72 yarns / 2.54 cm, and the weft yarn density is 58 yarns / 2. A weaving machine with a .54 cm twill structure was woven. Thereafter, post-processing and water-repellent processing were performed in the same manner as in Example 1 to obtain a woven fabric having a warp density of 79 / 2.54 cm, a weft density of 67 / 2.54 cm, and a cover factor (CF) of 2380.

Example 4
As the polyester highly oriented undrawn yarn B, the fiber cross section is a concentric core-sheath type, the mass ratio (core / sheath) is 75/25, and zirconium carbide is contained only in the core as an infrared absorbing substance. A polyester highly oriented undrawn yarn having a degree of elongation of 147%, a single yarn fineness of 2.7 dtex, and a total fineness of 130 dtex48f, composed of highly oriented undrawn fibers containing 3.75% by mass of zirconium carbide in the entire fiber was used. Except that, a 163 dtex 216f mixed fiber entangled yarn was obtained in the same manner as in Example 1. Thereafter, weaving, post-processing and water-repellent processing were performed in the same manner as in Example 1 to obtain a woven fabric having a warp density of 143 yarns / 2.54 cm, a weft density of 74 yarns / 2.54 cm, and a cover factor (CF) of 2255.

<Consideration of Examples and Comparative Examples>
The fabrics according to the examples all have excellent water repellency, and it has been confirmed that a secondary effect can be obtained by adding an appropriate additive to the fiber. In particular, the fabrics according to Examples 1, 2, and 4 were confirmed to have excellent water repellency (lotus effect). Since the woven fabric according to Example 3 had a low cover factor (CF), it was slightly inferior in water repellency as compared with the other examples. This is presumably because voids increased in the fabric and water drops tended to fall into the voids as the texture point of the fabric became slightly rough.

  On the other hand, in Comparative Example 1, since the single yarn fineness of the polyester fiber A in the mixed fiber entangled yarn was too thick, the contact area with water droplets increased and the fiber became rigid, so that the surface of the mixed fiber entangled yarn The air retaining layer that retains air in the portion and suppresses the transfer of water droplets was not formed so much, and the water repellency was poor. Further, in Comparative Example 2, the polyester fiber B in the mixed fiber entangled yarn is too thin, and conversely in Comparative Example 3, the surface part of the mixed fiber entangled yarn has the desired shape. In addition, the desired water-repellent performance could not be imparted to the woven fabric.

DESCRIPTION OF SYMBOLS 1 ... Supply roller 2 ... 1st take-up roller 3 ... Heater 4 ... False twister 5 ... 2nd take-up roller 6 ... 2nd delivery roller 7 ... 3rd take-up roller 8 ... Winding roller 9 ... Package YA of mixed fiber entanglement yarn ... Package YB of polyester highly oriented undrawn yarn A ... Package of polyester highly oriented undrawn yarn B

Claims (7)

A mixed entangled yarn composed of a polyester fiber A having a single yarn fineness of 0.2 to 0.9 dtex and a polyester fiber B having a single yarn fineness of 1.0 to 5.0 dtex,
The mixed fiber entangled yarn has a false twist crimp as a whole, and the mass ratio (A / B) of the polyester fiber A and the polyester fiber B is in the range of 20/80 to 80/20,
A mixed fiber entangled yarn in which a protruding portion of the polyester fiber A is formed on a surface portion of the mixed fiber entangled yarn.   The mixed fiber entangled yarn according to claim 1, wherein the crimp rate is in a range of 10 to 45% and the number of entanglements is in a range of 90 to 150 pieces / m.   The mixed fiber entangled yarn according to claim 1 or 2, wherein the polyester fiber B includes a sunlight shielding substance.   The mixed fiber entangled yarn according to claim 1 or 2, wherein the polyester fiber B includes an infrared absorbing material. A method for producing a mixed fiber entangled yarn according to any one of claims 1 to 4,
A drawing step of drawing a polyester highly oriented undrawn yarn B having a single yarn fineness of 1.5 to 6.5 dtex and an elongation of 100 to 160% at a draw ratio of 1.1 to 1.4 times;
The polyester highly oriented stretched yarn B stretched in the stretching step and the polyester highly oriented unstretched yarn A having a single yarn fineness of 0.4 to 1.3 dtex and an elongation of 80 to 110% are processed at a processing speed of 100 to 100%. A composite false twisting step of composite false twisting under conditions of 700 m / min and a draw ratio of 1.10 to 1.30 times;
A mixed fiber entanglement step in which the composite false twisted yarn obtained in the composite false twisting step is mixed and entangled under conditions of an air pressure of 0.1 to 0.6 Mpa and an overfeed rate of 1 to 4% using a fluid nozzle;
A method for producing a mixed fiber entangled yarn. A woven or knitted fabric in which the mixed fiber entangled yarn according to any one of claims 1 to 4 is woven and knitted,
A woven or knitted fabric having a mean deviation (SMD) of the surface roughness of the woven or knitted fabric by the KES-F system in the range of 3.0 to 8.0 μm and water-repellent.   The woven or knitted fabric according to claim 6, wherein the cover factor (CF) is in the range of 1500 to 3000, and the water droplet rolling angle is 15 degrees or less.