JP2004238786A - Napped pile thread and napped pile fabric - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve problems of napped pile fabrics such as crack of the base or transparent feeling that disturbs quality level of the fabrics which are formed by cut pile of multi-filament yarn of synthetic fibers, by obtaining bulky conjugated fibers which utilize functionalities of polyesters and forming multi step pile, and to obtain high grade napped pile fabrics having moire pattern which clearly exhibit color differences between dyeing effect of polyester fibers. <P>SOLUTION: The napped pile fabrics formed by carrying out cut pile of multi filament yarns of synthetic fibers, the multi filament yarn of synthetic fibers comprise at least two kind of multi filament combined filament yarns with shrinkage difference, wherein the high shrinkage side polyester fiber is crimped and sink from the surface of pile by expressing 1-40% of percent elongation for crimp expression to form the multi step pile, and the low shrinkage side polyester fibers exists on the surface of the pile. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to nap pile yarn and nap pile fabric, and particularly focuses on the "eye" (or "crack" or "penetration") which is most disliked in the quality of pile fabric, and pile fibers have not been available in the past. Forming a multi-step pile form, the short pile fiber possesses crimp, so that the whole pile fiber volume is increased from the pile root due to high bulkiness, shrinkage stress effect, etc. The present invention relates to a nap pile yarn and a nap pile fabric having excellent characteristics that do not cause the "eye flaw" defect.

  Conventionally, pile fabrics made of synthetic multifilament yarns and having naps on the fabric surface have excellent appearance, touch, and texture, and are used for clothing, chair upholstery for furniture, automobiles, trains, and other vehicle interiors. It is used for various purposes such as materials.

  In particular, in the field of automotive interior materials, since fashionability has been demanded, the direction of diversifying pile products and imparting an attractive appearance has been increasingly searched for. However, the nap pile fabric still has a drawback of generating "eyeburn" due to its structure, and has been a major problem in terms of quality only for high-end products.

  Conventionally, in order to improve the surface quality of a pile pile fabric using a synthetic fiber multifilament yarn, various attempts and methods for improving “ground cracking” and “through-the-ground” have been proposed.

  When synthetic fibers were first adopted in this field, the false twisting technology was used to crimp multifilament fibers to take advantage of the effect of increasing the volume, and to improve the covering properties of the nappied fabric. There was a method to make the inner ground thread and fabric less visible. Further, after that, a technique has been proposed in which the cross-section of the multifilament fiber is changed to have a highly irregular shape, thereby increasing the bulkiness of the yarn and improving the covering property, and is generally used today.

  In addition, the technique for ultra-fine multifilament fibers has been rapidly developed, and a method of increasing the apparent volume of a fiber bundle by using the fine multifilament fibers has also been used frequently together with the purpose of aiming for a soft feeling.

  In the development of composite processing technology in the high-order processing field, conventionally, in order to solve the problem of the surface quality of the napped pile fabric, a composite yarn composed of a synthetic fiber multifilament yarn having a dry heat shrinkage ratio of 20% or more has been used. There is proposed a raised pile woven or knitted fabric having two different pile heights (for example, see Patent Document 1). In this case, by using a composite yarn having a difference in shrinkage as a pile yarn, a raised pile fabric having a different height of a pile portion after processing is obtained, thereby reducing defects such as “whitening” and “white blur”. “Cracks in the ground” and “feeling through the ground” have not yet been resolved. Similarly, an example has been proposed in which “whitening” and “white blur” are reduced by combining a crimped yarn and a non-crimped yarn into a pile yarn (for example, see Patent Document 2).

  In addition, proposals have been made to improve “hair fall” and “feeling through the ground” using characteristics such as a crimp expression rate, a torque number, and a crimp number of a multifilament yarn (for example, Patent Document 3). reference). Still further, there has been proposed a yarn having a concavo-convex structure using spun yarn mainly composed of latently crimped fibers to improve “aesthetics” (for example, see Patent Document 4). Furthermore, by combining a crimped yarn with a non-crimped yarn and utilizing a non-crimped yarn having a high dry heat shrinkage, the defects of "hair fall" and "white blur" are extremely good, and "transparency" There is also a proposal of a raised pile woven or knitted fabric which is improved from the above and has excellent volume feeling and soft touch property (for example, see Patent Document 5).

  Further, a cut pile warp knitted fabric in which the pile yarn is composed of a low-shrink yarn having a crimp number of 0.5 / cm or less and a composite yarn having a crimp number of 3.0 to 30 / cm and a boiling water shrinkage of 20% or more has been proposed. (For example, see Patent Document 6).

However, all of these proposals only deal with the improvement and improvement of the surface quality of "whitening" and "white blurring". No further proposals have been made.
JP-A-10-212646 Japanese Utility Model Publication No. 7-44758 JP-A-7-310258 JP-A-10-259543 JP-A-12-226755 Japanese Patent No. 3396938

  SUMMARY OF THE INVENTION An object of the present invention is to solve the problem of firstly improving the "eye" (ground cracking, see-through), which has been conventionally difficult to improve, with a pile pile fabric formed by cut pile with synthetic multifilament yarn. It is an object of the present invention to provide a nap pile yarn and a nap pile fabric capable of increasing the volume from the root, further improving the covering property, eliminating the eyes and improving the pile quality without see-through.

  Secondly, it has excellent features that show high covering properties and eats insects and does not cause defects in eyespots, and it sinks into the pile inside using the sharpness and deep dyeing effect of cationic dyeable polyester. It is an object of the present invention to provide a nap pile yarn and a nap pile fabric which express a deep color and have a feature of distinguishing a different color effect from a pile surface fiber having a light dyeing property.

The present invention has the following configurations in order to solve the above-mentioned problems. That is,
(1) In a nap pile fabric formed by a cut pile composed of a synthetic fiber multifilament yarn, the synthetic fiber multifilament yarn is composed of a multifilament mixed yarn composed of at least two types of polyester fibers having a difference in shrinkage. The polyester fiber on the shrinking side is crimped and has a crimp expression and elongation ratio of 1 to 40%, and sinks from the pile surface to form a multi-step pile. The polyester fiber on the low shrinking side is the pile surface side Nap pile fabric characterized by the fact that it is present in

  (2) In the multifilament mixed yarn comprising at least two types of polyester fibers forming the nap pile, the difference in dry heat shrinkage between the polyester fiber on the high shrinkage side and the polyester fiber on the low shrinkage side is 15% or more. At the same time, the polyester fiber on the high shrinkage side has a dry heat shrinkage of 15% or more, and entangled portions and non-entangled portions are randomly present in the fiber axis direction. The raised pile fabric according to the above (1), wherein there is one or more per 0.54 cm (1 inch).

  (3) The raised pile fabric according to (1) or (2), wherein the polyester fiber on the high shrinkage side is a cationic dyeable polyester fiber.

  (4) The raised pile fabric according to any one of (1) to (3), wherein the polyester fiber on the low shrinkage side has a flat cross-sectional shape.

  (5) A pile yarn used for a nap pile fabric formed by a cut pile made of a synthetic fiber multifilament yarn, wherein the synthetic fiber multifilament yarn is a multifilament mixed yarn composed of at least two types of polyester fibers having a difference in shrinkage. The multifilament mixed yarn comprising the at least two types of polyester fibers has a dry heat shrinkage difference of 15% or more between the high shrinkage side polyester fiber and the low shrinkage side polyester fiber, and has a high shrinkage ratio. The polyester fiber on the side has a property that the dry heat shrinkage rate is 15% or more and the crimp development and elongation rate is 1% or more, and the entangled portion and the non-entangled portion are randomly present in the fiber axis direction. Wherein the number of each of the entangled portion and the non-entangled portion is at least one per 2.54 cm (1 inch). Pile yarn.

  The polyester fiber on the low shrinkage side has a flat cross-sectional shape and contains 0.2 to 5% by weight of titanium oxide and is present on the pile surface side, and the polyester fiber on the high shrinkage side has a round cross section and / or irregular shape. Consists of crimped cationic dyeable polyester fiber with a cross-sectional shape, sinks from the pile surface by exhibiting high shrinkage and crimping / irregular characteristics, and the entire pile fiber is diffused from the pile root and forms a multi-step pile Preferably, it is

  When composed of the polyester fiber on the lower surface side of the pile and the cationic dyeable polyester fiber present on the inner surface side of the pile with high shrinkage and crimping, the different color effect due to the difference in dyeing property can be more expressed. It is also.

  A high-grade nap that is soft and has a span-like texture and graininess in a nap pile fabric formed by a cut pile made of a synthetic fiber multifilament yarn without being able to improve the "defect" defect which is the largest defect of the pile fabric. It is possible to obtain a pile fabric.

  Furthermore, the mutual defect of at least two kinds of polyester fibers and the effect of blending and entanglement form improve the "defect" defect which is the greatest defect of the pile fabric, exhibit high covering properties, and dye the polyester fibers. A high-quality nap pile fabric that exhibits a heather tone and a grainy feeling that clearly expresses the contrast of different dyeing differences due to the sexual effect, and that is dry and soft and also features a spanning texture.

  First of all, the first task was to address the problem of improving the "eye-strike" (ground cracking, see-through), which has been considered difficult to improve in the nap pile fabric formed by cut pile with synthetic multifilament yarn. A piled pile yarn and a piled pile fabric which can diffuse the water, increase the volume from the root of the pile, further enhance the covering property, eliminate the eyes and improve the pile quality without see-through.

The most important means for constructing the raised pile fiber of the present invention is to obtain a crimped high shrinkable yarn. The production method is a method of subjecting a highly oriented undrawn yarn obtained by high-speed spinning using a polyethylene terephthalate chip to a low-magnification Indolo false twisting process to obtain a special crimped yarn having crimping and high shrinkage. It is.

  Details and physical properties will be described later in Examples.

  It is necessary that the crimped and high-shrinkage polyester fiber obtained by the above method has the following characteristics.

  1) A crimped fiber that exhibits a crimp development and elongation ratio of 1% or more, preferably 1 to 40%.

  Further, the crimped and high shrinkage polyester fiber obtained by the above method preferably has the following characteristics.

  2) possesses a property of a dry heat shrinkage of 15% or more.

  3) It has a property that the dry heat shrinkage is 15% or more higher than that of the polyester fiber on the low shrinkage side. That is.

  The pile yarn for obtaining the napped pile fabric of the present invention is obtained by compounding the above-mentioned special crimped yarn and the low shrinkage side crimped polyester fiber forming the surface side of the pile fabric.

  First, a method for producing a crimped polyester fiber on the low shrinkage side and a process for compounding the same will be described.

  In order to obtain a crimped polyester fiber having a low shrinkage side, a highly oriented unstretched yarn is utilized, and a low crimping process is performed by an indole-second set false twisting method, and a low shrinkage crimped yarn is first produced. The above-mentioned special crimped yarn with crimping and high shrinkage characteristics is separately supplied by a process of mixing and entanglement on a false twisting machine continuously, and then mixed by a mixed entanglement nozzle such as air. -To manufacture a composite processed yarn in which the entangled portion and the entangled portion-non-entangled portion exist randomly in the length direction of the yarn.

  In addition, the low crimped yarn has a crimping property elongation rate of about 20% or less as a crimping property. This is a characteristic that is an important factor that affects the surface quality, such as a clean napped feeling when used as a napped fabric.

  In addition, it is sufficient to use the nozzle of a general maker for the mixed fiber entangled prescription, and both the entangled portion and the non-entangled portion are long, short, many, and few are optional depending on the purpose of the product. "It can be said that the confounding portion is short and the configuration is small for improvement. However, it is desirable that at least one entangled portion and at least one entangled portion exist for each 2.54 cm in order to have a soft feeling and a span-like texture.

  Furthermore, the purpose of forming the entangled portion-non-entangled portion is to randomly mix the low-shrinkage crimped fiber and the high-shrinkage fiber in the entanglement treatment and suppress the singularity of exhibiting the properties of both yarns by entanglement. Also, this is because the characteristics of the present invention are constituted by appropriately exhibiting the respective characteristics. For example, when compared to the case where both yarns are simply aligned or twisted, the high shrinkage fiber slips freely even if the pile fiber with a short nap length shrinks, despite being restrained by twisting. Shrink.

  On the other hand, the low-shrink fibers are raised independently and cover the pile surface.Since they have a single structure, they are characterized by a simple structure consisting of a high-shrink fiber pile, a low-shrink fiber pile and a two-stage pile. As a result, it is not possible to form a multi-step pile having both the features of the span tone effect and the “graininess” (the difference in sensation between the entangled portion and the non-entangled portion).

  The napped fabric using the entangled composite yarn proposed so far has a entangled portion, so that the yarn is thin and the lump height is poor, so that the covering property is poor and the "muddy" is caused. The problem is as described above.

  As the effect sought by the present invention, in the entangled portion is affected by heat in the dyeing process, because the entanglement and the restraining force are strong and weak, the stress difference after shrinkage is generated, and the uneven shape change is emphasized, and the yarn inside and between the yarns is emphasized. Increase the volume. It is also by this effect that a moderate shari taste is exhibited and a span-like texture and graininess can be obtained.

  On the other hand, the non-entangled portion has a configuration in which the tip of the low-shrinkage crimped yarn appears on the pile surface because the high-shrinkage fiber sinks freely. Since the fiber length difference occurs due to the migration effect of the entangled portion described above, this causes a phase with the non-entangled portion, a random fiber length difference occurs after cutting, the entire pile fiber is diffused, and the multi-step pile is formed. Is composed. In addition, this configuration provides the softness and the graininess of the surface touch moderately.

  The effects and characteristics of the above-described crimped and highly shrinkable fibers in the above configuration will be described in detail.

  By being a crimped fiber of the item 1), the high shrinkage fiber itself shrinks, and in combination with the crimping effect, the bulky form can be expanded. As a result, since the pile of low shrinkage crimped fibers exhibits a great feature of diffusing from the root of the pile at the same time, the volume of the yarn is increased, and the covering property of the pile surface is further enhanced, so that "eyeburn" is not caused. Will be.

  Next, it is about possession of characteristics in the range of 1% or more, particularly 1 to 40%, of the crimp onset elongation ratio. Those having a crimp expression elongation rate of more than 40% have too high a crimpability to form a hard layer inside the pile and emphasize only the characteristics of the high shrinkage fiber. It has a nice texture. Since such a texture is not preferred for the nap pile fabric, it is important to maintain the characteristics in this range. Preferably it is 2 to 30%, more preferably 2 to 25%.

  The property that the dry heat shrinkage of the high-shrinkage-side polyester fiber of the item 2) having the property of 20% or more is maintained by lowering the crimped high-shrinkage fiber from the pile surface. The structure and form that make the tip protrude on the pile surface is adopted.

  Furthermore, due to the shrinkage of the crimped highly shrinkable fiber, particularly in the entangled portion, the fiber is affected by heat in the dyeing process, and is entangled and has a strong binding force. At this time, since a phase change occurs in all the fibers, a yarn length difference particularly between the fibers is developed in the non-entangled portion to create a basic configuration of a multi-step pile.

  At the same time, the volume of the pile fiber is increased by diffusing the entire pile fiber from the root of the pile, so that the multi-step pile form is better formed.

  Since a difference in shrinkage stress is generated to form a concavo-convex structure, it is also a great feature to exhibit a sharp feeling and a span-like grain feeling.

  In order to form a multi-step pile form, which is such a great feature, it is important to have a property of a dry heat shrinkage of 20% or more. The upper limit is preferably 40%, and more preferably 35% or less.

The effect of having the property that the dry heat shrinkage of the high-shrinkage-side polyester fiber of the item 3) having the dry heat shrinkage is 15% or more higher than that of the low-shrinkage crimped yarn is as follows. The reason for this is to provide a moderate height difference between the pile height and the low crimped fiber. If the difference in dry heat shrinkage of the crimped high shrinkage yarn is less than 15%, the difference in pile height between the two yarns is small, and it is difficult to express a good multi-step pile form.
Further, the upper limit difference from the low shrinkage crimped yarn is preferably 30% or less. If the difference in the dry heat shrinkage exceeds 30%, the low crimped fiber will cover the surface excessively, the hair will easily fall off, and the nap feeling will be poor. In addition, a hard layer is formed inside the pile with a short pile length, and even if the low crimped fibers cover the surface, the texture becomes strong with a felt feeling.

  With the features and effects of the above three items, the pile pile fibers are increased in volume and diffused from the roots, and a multi-step pile form is created to give a soft texture. It is possible to establish a surface quality free from "ground scar" and obtain a luxurious piled pile fabric.

  In producing the special crimped yarn, the spinneret in the spinning process is formed into an irregular cross-section and the cross-sectional shape is changed (various types such as a 、 shape, an X shape, a flat shape, and a hollow shape) so that the yarn is further raised. This is preferable because it increases the properties and gives a greater effect to the present invention.

  Hereinafter, the present invention will be described in detail.

  In recent years, polyester-based fibers have been widely used in the interior field, including clothing, due to their performance, functionality, ease of handling, and cost, and the range of utilization will be immeasurable in the future.

  Therefore, it can be said that the fact that the pile yarn is a polyester-based fiber is very advantageous for product development in view of future utilization, processability, cost reduction, and further pursuit of fashion sensation.

  In general, the use of highly oriented undrawn yarns of polyester fibers is because the Indo-row false twist processing can be easily performed and the productivity is excellent. In addition, since false twisting machines have been developed that can perform direct connection processing with mixed fiber entanglement processing on the machine, process simplification and cost reduction can be achieved. In addition, since the multifilament fibers are arranged in parallel and sufficiently opened, there is also a technical effect that the multifilament fibers can be stably entangled with the other multifilament fibers.

  The configuration of the low crimp false twisted yarn utilizing the above-mentioned effects is a general post-oriented unstretched yarn, is low crimped by a secondary set false twisting method, and is a soft and stable physical property in a post-process. It is a good yarn. In the field of sheet fabrics, there is a strong tendency for softening, and fine multifilament fibers have been favorably used. In recent years, the tendency toward finer fineness has been increasing. In addition to the use of the fine multifilament, the present invention can be effectively used for all high-profile cross-sections, which is a more advanced technology, and contributes to product development. The production method and technical development of the mutually crimped high-shrink yarns can be said to be the essence of the present invention, and the features and effects are as described above.

  In the false twisting method and the mixed fiber technology, the model, the process, the entangled nozzle, the conditions, and the like do not need to be specially selected, but the number of each of the entangled portion and the non-entangled portion in the mixed fiber technology is 2. It is desirable that one or more exist per 54 cm.

If the number of each part is less than one per 2.54 cm, the feature becomes monotonous as a processed yarn. Conversely, if the entanglement is large, the entangled portion becomes strong and long, the coarseness is strong, the bulkiness is poor, and it is difficult to obtain a desired piled pile fabric having an excellent soft texture. Of course, there is also a concern that the covering property may be adversely affected and the "meshiness" may not be improved. Therefore, the number of each of the entangled portion and the non-entangled portion of the mixed fiber composite yarn is preferably 1 to 5 per 2.54 cm. More preferably, it is 1-3. The air pressure in the confounding process may be in the range of ³ to 5 kg / cm ^{2 in} consideration of the processing speed, economy and cost.

  Next, the second object of the present invention is to exhibit high covering properties, eat insects, and exhibit excellent characteristics that do not cause eye-sticking defects. A nap pile yarn and a nap pile fabric having a characteristic of expressing a deep color by sinking into the inner surface of the pile by using the fiber and exhibiting a different color effect from the pile surface fiber having a light dyeing property will be described.

  It is preferable to use a polyester fiber having a flat cross section as a low-shrinkage side polyester fiber having low shrinkage properties, since high covering properties can be exhibited. The definition referred to as a flat cross-sectional shape is that the length / width ratio of the fiber cross-section is preferably up to 1 <length ratio (flat ratio) ≦ 5, and the shape is rectangular, elliptical, elliptical leaf-shaped, and rosary Any other can be used. However, as a result of repeating trial and error, the aspect ratio was more preferably in the range of 2.0 to 4.0 in view of the balance between high covering property, worm-eating, improvement of muscular taste and spinnability, and high processability. . Based on the above results, a method for producing a polyester fiber on the low shrinkage side and a process of compounding the polyester fiber in the present invention will be described.

  In order to obtain the polyester fiber on the low shrinkage side, a polyethylene terephthalate chip is arbitrarily mixed with titanium oxide, melted, discharged from a die having a flat cross section, and a high-orientation undrawn yarn is produced by a high-speed winding method. Next, it is obtained by drawing through a heat setting and a stretching step. In addition, the expansion is expanded by forming the highly oriented undrawn yarn into a crimped, low-shrink yarn that has been subjected to low crimping by the Indaw-secondary set false twisting method.

  Another important means of the present invention is the utilization of cationic dyeable polyester. Another object of the present invention is to obtain a multifilament fiber having a round cross section or an irregular cross section having crimped and high shrink properties.

  In order to emphasize the color development and heat-difference of the entire pile fabric by taking advantage of the vivid color and deep color of the cationic dyeable polyester fiber, and especially from the root of the pile by diffusing the entire pile fiber due to the irregular cross section and high shrinkage characteristics It is to get a big purpose and effect to increase the volume.

  The manufacturing method is to use a cationic dyeable polyethylene terephthalate chip (e.g., 5-sodium sulfoisophthalic acid copolymerized polyester) to discharge a highly oriented undrawn yarn obtained by a high-speed winding method by discharging from a die having a round or irregular cross section. The object of the present invention is to produce a specially crimped yarn having a low crimp and a high shrinkage property by subjecting it to low-magnification indolin false twisting.

  The cationically dyeable polyester of the above crimped and high shrinkable fibers is more effective if it has a modified cross section, and the cross sectional shape may be any shape such as △, I, ×, S, π, λ, It is a cationic dyeable polyester that has crimping and high shrinkage characteristics, and productivity must be taken into consideration. Therefore, △, ellipse, ∞ (two-piece chain flat), and × type are effective.

  In addition, the pile shrinkage effect of the pile of the high shrinkage fiber itself and the pile fiber of the low shrinkage fiber are simultaneously diffused from the root of the pile, so that the pile yarn volume is increased, and the covering property of the pile surface is further enhanced, and the insects are eaten by insects. , Does not cause eyestrain. It demonstrates the greatest features of the present invention.

  Furthermore, in the field of sheet fabrics, the tendency of softening has become stronger, and fine multifilament fibers having a size of 1.5 dtex or less have been favorably used. However, although the tendency toward finer fineness is increasing, the tendency toward a rut in texture and characteristics cannot be denied. In the present invention, in particular, by using a polyester fiber having a flat cross section as the fiber on the low shrinkage side, it is possible to obtain a dry and unique smooth feeling having a flat cross section, a smooth soft texture and a high covering property.

  In the present invention, an excellent effect is produced when the low-shrinkage side polyester fiber contains 0.2 to 5% by weight of titanium oxide called semi-dal and full-dal in a flat cross section and is present on the pile surface side. The technology has also been established to apply false twisting to flat cross-section fibers that cover the pile surface and exhibit a multi-step structure and a dry feeling effect, and the crimping and high bulking effects enhance the covering properties. In addition, by changing the titanium oxide content as a matting agent within the above range, the light color effect of the dyeability and the contrast with the cationic dyeable polyester fiber on the high shrinkage side are sharpened, thereby expressing a different color and heather effect. That is another major feature.

  This means that the fiber containing 0.5 to 5% by weight of titanium oxide, which is referred to as Fuldar, can exhibit this effect more and more. Another advantage of the nap pile fabric of the present invention is that it can exhibit excellent characteristics of span tone "graininess" due to a pile structure in which differently dyed pile fibers are mixed or scattered due to blending / entanglement.

Next, a method of imparting crimp to the flat low-shrinkage side polyester fiber is to perform crimping, that is, crimp onset and elongation of a highly oriented undrawn yarn which has been subjected to Indian low false twisting by secondary heat setting. It was intentionally reduced to a range of 30% or less. Further, it is effective that the false twisting process and the mixed fiber entanglement process can be directly connected on the machine, thereby simplifying the process and reducing the cost.

  The performance, effects and characteristics of the synthetic fiber multifilaments and composite yarns used in the cut pile for the purpose of the present invention to improve the texture and obtain a heather feeling and graininess with a high effect of different dyeing are as described above.

  The best form of the napped fabric formed by the cut pile with the synthetic fiber multifilament composite yarn is a double Russell knitted fabric in order to better exhibit the shrinking performance and effect of the crimped and highly shrinkable yarn. In the subsequent steps as well, a method of dyeing with a knitted fabric (commonly anti-dyeing) is a method that is desirable as a technical and manufacturing procedure because the pile fibers can be freely shrunk and the multi-step pile shape, graininess and heather can be easily expressed.

  Further, the structure of the "multi-step pile" of the mixed fiber / composite pile yarn and the pile fabric of the present invention will be described in more detail with a schematic diagram.

  The mixed fiber / composite pile yarn in the schematic diagram 1 is subjected to a treatment at a dry heat temperature of 170 ° C. for 3 minutes, added under a load of 0.1 g / 1.1 dtex for 30 seconds, and then collected in a state of 10% relaxation. It is.

  The fiber A is a low-shrinkage-side polyester fiber in which a draw yarn or a highly oriented undrawn yarn is crimped and reduced in shrinkage by a secondary set false twisting method, or a polyester fiber having a flat cross-sectional shape. It is seen that a phase loop is developed in the non-entangled portion, and a pile length difference occurs after the pile cutting, which contributes to the configuration of the multi-step pile. The fiber B is a high-shrinkage polyester fiber having a crimp or a high-shrinkage cationic dyeable polyester fiber. In the entangled portion, the low crimped fiber and the crimped / highly shrinkable fiber are entangled, causing migration between the fibers due to stress variation, making the entire pile yarn thicker, and forming a multi-stage yarn difference structure to the non-entangled portion. Spread. When a flat polyester fiber is used in the non-entangled portion, the volume can be increased because more voids are generated due to the synergistic effect of crimped and irregular cross sections.

  The pile fiber C in the schematic diagram 2 is the fiber A in the schematic diagram 1 and becomes a polyester fiber on the low shrinkage side and covers the pile surface side with a yarn length difference. The pile fiber D is a high-shrinkage polyester fiber or a cationic dyeable polyester fiber having a round cross section or an irregular cross section possessed by crimping, and constitutes the pile inner surface side with a yarn length difference like the multifilament fiber C on the pile inner surface. . That is, the pile fiber B in the schematic diagram 1 is shown, and the shrinkage property, crimping property, and the porosity are increased due to the deforming effect, the bulk height and the volume are increased, and the entire pile fiber is diffused from the pile root to make the present invention. It exhibits high covering properties, which is a characteristic of "I", and improves "eyes".

  E is a mixed fiber portion in which the polyester fiber on the low shrinkage side and the crimped polyester fiber on the high shrinkage side are entangled. By partially blending such fibers, a crosslinking effect can be exerted, and this greatly contributes to improving the texture at the sheet curve where the ground cracks easily occur. In addition, when the entangled portion is mixed, a sharp feeling is exhibited, or when a lump of fibers appears on the pile surface, a "grain feeling" is exhibited.

  F is the ground cloth of the pile fabric, and the pile form made of the mixed fiber of the present invention makes it difficult to see the ground cloth surface due to the diffusion from the pile root and the cross-linking effect of the fibers. This effect greatly improves the quality of the standing pile.

  From the above configuration and the dyeing function of the polyester fiber, a vivid contrast with the light color of the fiber A (pile fiber C) and the deep color of the cationic dyeing effect of the sunk fiber B (pile fiber D) is sufficient. It is demonstrated without.

  Next, the present invention will be described in more detail with reference to Examples and Comparative Examples.

  The measuring methods of the various characteristics described in the present invention are described below.

[Dry heat shrinkage]
The same evaluation method is used for both single and composite yarns of each fiber yarn.

For each of the single and composite yarns, five sets of 10-turn scabs are made. After standing for several hours, the length after 30 seconds is measured with a constant load per 0.1 g / 1.1 dtex, and is defined as l ₁ .

Next, a treatment is performed at a dry heat temperature of 170 ° C. for 3 minutes, and the length after 30 seconds is measured by a constant load per 0.1 g / 1.1 dtex in the same manner to obtain l ₂ .

Dry heat shrinkage = [(l ₁ -l ₂ ) / l ₁ ] x 100 (%) is calculated and expressed as the average value of five cases.

[Crimp expression elongation rate]
A case is prepared by winding a highly crimped high-shrink yarn five times. The apparent fiber is subjected to a dry heat treatment at 170 ° C. for 3 minutes under a load of 0.022 g / dtex, and the bulge length at this time is set to l ₁ .

Next, a constant load of 0.11 g / dtex is applied to the apparent fiber, and the bulge length at this time is set to l ₂ .

The rate of elongation of crimp expression = [(l ₂ −l ₁ ) / l ₁ ] × 100 (%) is calculated, and the average value is shown for five cases.

[Number of confounds and unconfounds]
The combined yarn is treated in a free state at 170 ° C. for 3 minutes.

  Thereafter, under a constant load of 0.1 g / 1.1 dtex, five pieces are stuck and collected on a paper frame of 2.54 cm. Subsequently, the image is projected five times with a reader printer, and the number of confounds and the number of non-confounds are visually counted. The average value of the five pieces is the number per 2.54 cm.

[Judgment of "eye eyes"]
A right angle corner is R = 10 cm, and a pile fabric is attached to an arc surface, and the state of “eyes” is visually observed from “very good to eyes”, and evaluated on a four-point scale (◎: very good, Δ) Good, △; slightly muddy, x: muddy mud), and a sensory judgment is performed by eight skilled persons.

[Soft texture]
Regarding the surface texture of the pile fabric, the skilled worker 8 evaluated the softness to the smoothness to the rough hardness by a four-point scale (◎; very soft, Δ; soft, Δ; smoothness, ×: strong coarseness). Perform sensory evaluation by name.

[Surface quality and grain]
Regarding the surface feeling of the pile fabric, the nap state and the graininess are visually evaluated on a four-point scale from "Good quality / graininess to poor quality / graininess"(A; (Slightly insufficient feeling, ×; poor quality / granularity), sensory judgment is performed by eight skilled workers.

[Example 1]
Using a polyethylene terephthalate chip having an intrinsic viscosity of 0.66 and containing 0.10% by weight of TiO ₂ , melt spinning and semi-drawing were performed to produce highly oriented undrawn yarn 134dtex (fineness) -144fil (filament) fiber.

  A highly oriented undrawn yarn of polyethylene terephthalate obtained by high-speed spinning at 3000 m / min using a 24-hole spinning nozzle was heated at a heating roll temperature of 100 ° C., a draw ratio of 1.35 times, and a false twist number of 3250 t / m. An Indian low false twisting process was performed to produce a highly crimped high-shrink yarn of 84 dtex-24fil.

  The crimped high shrinkable yarn had properties of a crimp development elongation of 4% and a dry heat shrinkage of 25%.

  The above highly oriented undrawn yarn is subjected to Indolaw second set false twisting under the conditions of a draw ratio of 1.65 times, a number of false twists of 3,000 t / m, a primary / secondary set of 185/180 ° C., and a low shrinkage of 68 dtex-144 fill. In addition, a low crimped yarn was obtained.

  The dry heat shrinkage of the single yarn was 3.7%, and the crimp onset elongation was 8%.

  Next, the highly crimped high-shrinkage yarn was continuously supplied from an individual roller and mixed with the low-crimped yarn and air-mixed and entangled to produce a composite yarn.

  The obtained composite yarn showed a randomly mixed and entangled form, and the number of entanglements and the number of non-entanglements were 1.2 / 2.54 cm and 1.3 / 2.54 cm. The crimping expression elongation rate of the composite yarn was 6.2%.

  The composite processed yarn is used as a pile yarn, and a double Russell machine is formed with a double Russell machine of 22 gauge and a ground yarn with a Tetron 84dtex-36fil and a 1-wale left-right swing structure. After the on-machine center cut, a pile fabric having a pile length of 2.8 mm (the length from the back surface of the fabric to the surface of the pile) is obtained. The pilging pile fabric was manufactured through the following flocking process.

  Further, the pile fiber was advanced to a dyeing process to give a ground dyeing and heat treatment effect and to sufficiently shrink the pile fiber, thereby increasing the volume of the pile fiber and diffusing it from the root.

  A nap pile fabric / product that forms a nap structure in the form of a multi-step pile through the above steps was obtained.

  According to the present invention, the volume is increased and diffused from the pile root of the pile yarn, and the partial cross-linking effect of the fibers synergistically eliminates the "eye-opening" defect, which has been a major drawback, and the "ground cracking" and "ground see-through". It was possible to obtain a high-grade nap pile fabric having no surface, having a soft, span-like texture and graininess, and having excellent surface quality.

[Example 2]
By changing the manufacturing conditions of the crimped high shrinkable yarn, a yarn having characteristics of a crimp onset elongation of 12% and a dry heat shrinkage of 20% was manufactured.

  All the production of the composite processed yarn was performed in the same manner as in Example 1.

  The obtained composite yarn showed a mixed fiber entangled form at random, and the number of entangled and non-entangled fibers was 1.1 / 2.54 cm and 1.3 / 2.54 cm. The crimping expression elongation rate of the composite yarn was 7.4%.

  Thereafter, similarly to Example 1, a nap pile fabric and product having a multi-step pile form were obtained by performing ground dyeing, pile fiber shrinkage, and crimping in the nap pile fabric production and dyeing process.

  Since the crimped high shrinkage yarn is designed and designed to have a high crimp development and elongation rate, the volume effect of the pile fiber as a whole is remarkably improved by the effect, and the cross-linking effect is synergistically produced, thereby increasing the “medium strength”. It was possible to obtain a high quality pile fabric having very good surface quality.

[Comparative Example 1]
A non-crimped high-shrink yarn of a copolymer polyester filament 84dtex-24fil was produced as the high-shrink fiber. The dry heat shrinkage showed a characteristic of 23%.

  All the production of the composite processed yarn was performed in the same manner as in Example 1.

  The obtained composite yarn showed a mixed fiber entangled form at random, and the numbers of entangled and unentangled were 1.3 and 1.4 / 2.54 cm. The crimp expression elongation rate of the composite yarn was 3.8%.

  Thereafter, in the same manner as in Example 1, a nap pile fabric in a multi-step pile form was obtained by performing ground dyeing, pile fiber shrinkage, and crimping in the nap pile fabric production and dyeing process.

  High shrinkage yarns are non-crimped, resulting in inferior voluminous feel in both entangled and non-entangled yarns, and lacking the effect of spreading from the pile root. Met.

[Comparative Example 2]
The low-shrinkage crimped yarn and the highly-shrinkable crimped yarn obtained by the Indo-low-second false twisting shown in Example 1 were subjected to ply twisting at a twist of 125 t / m. This was used as a raised pile to obtain a raised pile fabric in the same manner as in Example 1. That is, the low-shrinkage crimped fiber and the crimped high-shrinkage yarn are in a form in which the fibers do not mix with each other, and cannot exhibit the crosslinking effect. The crimping and elongation ratio of the conjugate twisted composite yarn was 6.7%.

  Since the obtained raised pile fabric is not a composite form with entanglement, the low shrinkage crimped fiber and the crimped high shrinkage yarn have a two-stage-like pile structure, each of which expresses and configures a single form. The texture was close to the texture and the graininess could not be expressed.

  It did not extend to a nap pile fabric capable of exhibiting characteristics as obtained from the composite structure pile yarn of the present invention having a entangled portion and a non-entangled portion.

  Table 1 shows the composition and evaluation results of the raw yarn and the pile yarn used in the present invention.

  Table 2 shows the evaluation results of the raised pile fabric of the present invention.

[Example 3]
Melt using a polyethylene terephthalate chip containing 2.15% by weight of TiO ₂ with an intrinsic viscosity of 0.60 as the draw yarn on the low shrinkage yarn side (fiber A), rectangular section with an aspect / width ratio of 1 / 3.5 After discharging and spinning from the die, heat set-drawing was repeated, and a flat section, highly oriented undrawn yarn 130dtex-72fil was produced in a production step of winding up the package at 2400 m / min.

  Further, the highly oriented undrawn yarn was heat set, and a draw yarn of 82 dtex-72 fill was produced at a draw ratio of 1.65.

Melting using a cationic dyeable polyethylene terephthalate chip containing 0.30% by weight of TiO ₂ with an intrinsic viscosity of 0.65 as a special crimped yarn on the pile high shrinkable yarn side (fiber B) After spinning, heat setting-drawing was performed and a highly oriented undrawn yarn 134dtex-24fil fiber was produced in a production process of winding up the package at 3000 m / min.

  Further, the above highly oriented undrawn yarn was subjected to Indian low false twisting at a heating roll temperature of 100 ° C., a draw ratio of 1.65 times, and a number of false twists of 2850 t / m, to give a crimped and highly shrinkable yarn of 84 dtex-24fil.

  In the compounding process, the composite yarn was supplied by separate yarn supply rollers from the respective packages of the draw yarn and the special crimped yarn having high shrinkage properties and mixed and entangled with an interlace air nozzle to produce a composite processed yarn.

  In the composite processed yarn, the entangled portion and the non-entangled portion were randomly present in the length direction of the yarn. Each characteristic is as follows.

Pile low shrinkage yarn crimp expression elongation rate;
Dry heat shrinkage: 4.1%
Pile high shrinkage yarn crimp expression elongation rate; 4.7%
Dry heat shrinkage: 22.0%
Composite processed yarn Crimp onset elongation rate: 3.6%
Number of confounds / non-confounds; 5 / 1.4 pieces / 2.54cm
The composite processed yarn is used as a pile yarn, and a double Russell machine is formed with a double Russell machine of 22 gauge and a ground yarn with a Tetron 84dtex-36fil and a 1-wale left-right swing structure. After the on-machine center cut, a pile fabric having a pile length of 2.8 mm (a length from the back surface of the fabric to the surface of the pile, a pile length of 2.5 to 3.0 mm is a product standard) is obtained.

  The pilging pile fabric was manufactured through the following flocking process.

  Further, the pile fiber was advanced to a dyeing process to give a ground dyeing and heat treatment effect and to sufficiently shrink the pile fiber, thereby increasing the volume of the pile fiber and diffusing it from the root.

  A raised pile fabric / product having a multi-step pile form through the above steps was obtained.

  According to the present invention, a piled pile fabric is obtained, in which pile fibers are increased in volume and diffused from the roots, and which have a brittle effect, which has no conventional drawbacks, and have excellent covering properties without cracks and grounds.

  In addition, it is an excellent one that can express the unique characteristics that match the soft touch of dry touch and the texture of span, and the contrast between the low shrinkage pile and the high shrinkage pile shows clear heather feeling and graininess It was possible to obtain a high quality standing pile fabric.

[Example 4]
The draw yarn on the low-shrink pile yarn side utilizes the highly oriented undrawn yarn of Example 3 to prepare an Indian low-secondary set temporary yarn at a draw ratio of 1.60, a false twist number of 2600 t / m, and a set temperature of 180/175 ° C. After making into a 84dtex-72fil crimped yarn having a low shrinkage and a low crimp by the twisting method, the above-mentioned special crimped yarn (used in Example 1) is continuously supplied from a roller separately on a false twisting machine. Then, a mixed processed yarn was produced in which the interlaced portion and the non-entangled portion were randomly present in the length direction of the yarn by interlacing and interlacing with the interlace air nozzle.

  It is possible to establish a technology for a highly oriented undrawn yarn with a flat cross section and full-dull, which makes it difficult to perform the false twisting method.

  Each characteristic is as follows.

Pile low shrinkage yarn Crimp expression elongation rate; 4.8%
Dry heat shrinkage: 4.3%
Pile high shrinkage yarn crimp expression elongation rate; 4.7%
Dry heat shrinkage: 22.0%
Composite processed yarn Crimp onset elongation rate: 6.2%
Number of confounds / non-confounds; 3 / 1.2 pieces / 2.54cm
Thereafter, in the same manner as in Example 3, a nap pile fabric / product in a multi-step pile form was obtained by performing ground dyeing, pile fiber shrinkage and crimping in the nap pile fabric production and dyeing process.

  The composite pile yarn uses a flat and crimped yarn for the low shrinkage side pile, thereby exhibiting a higher covering property than that of Example 1 or more due to the crimping and bulkiness of the fiber itself. With the effect, the volume is increased and diffused from the base of the pile to improve eyes.

  The texture shows a dry and smooth soft feel and an excellent feeling of softness, and also exhibits a span-like grain feeling, and can also exhibit an excellent heather tone with a clear contrast between the low shrink pile and the high shrink pile. A high quality pile fabric was obtained.

[Example 5]
Melting using a polyethylene terephthalate chip containing 2.15% by weight of TiO ₂ having an intrinsic viscosity of 0.60 as the draw yarn on the low-shrinkage yarn side of the pile, melted into eight leaves (cross-sectional shape described in JP-A-3-19909) After discharging and spinning from the shape die, heat set-drawing was repeated, and a highly oriented undrawn yarn 131dtex-36fil was produced in a production process of winding up the package at 2400 m / min.

As a special crimped yarn of the pile height shrinkage yarn side, it melted using polyethylene terephthalate chips containing TiO ₂ 0.30 wt% with intrinsic viscosity 0.65, △ after cross-section spinneret discharge-from spinning, heat setting - stretching And a semi-dull fiber of highly oriented undrawn yarn 136 dtex-24fil was produced in a step of winding up the package at 3000 m / min.

  The unstretched yarn was subjected to Indoro false twisting at a heating roll temperature of 100 ° C., a stretching ratio of 1.65 times, and a number of false twists of 2850 t / m to form a crimped, highly shrinkable yarn of 85 dtex-24fil.

  The highly oriented undrawn yarn is subjected to low shrinkage and low crimping by the Indaw-secondary set false twisting method under the conditions of a draw ratio of 1.60, a number of false twists of 2900 t / m, and a setting temperature of 180/175 ° C. After setting to −36 fill, the above-mentioned special crimped yarn is continuously supplied from a separate roller on a false twisting machine, and mixed and entangled with an interlace air nozzle. A composite textured yarn randomly present in the sample was obtained. Each characteristic is as follows.

Pile low shrinkage yarn Crimp expression elongation rate; 5.0%
Dry heat shrinkage: 4.6%
Pile high shrinkage yarn crimp expression elongation rate: 5.3%
Dry heat shrinkage: 25.4%
Composite processed yarn Crimp expression elongation rate: 5.7%
Number of confounding / non-confounding; 1.5 / 1.6 pieces / 2.54 cm
In the same manner as in Example 3, a raised pile fabric / product having a multi-step pile structure was obtained by performing ground dyeing, shrinkage and crimping of pile fibers in the production and dyeing process of the pile pile fabric.

  The composite pile yarn uses a crimped yarn having an elliptical eight-leaf cross section for the low shrinkage side pile, thereby exhibiting high crimping and high covering properties with high crimp strength and a synergistic effect of the high shrinkage pile fiber. Improves eyeskin by increasing and spreading the volume from the root of the pile.

  The texture was dry and smooth and excellent in softness peculiar to the elliptical 8-leaf cross section. It was possible to obtain a high-grade nap pile fabric which exhibited a span-like grain feeling and heather-like feeling and provided a clear contrast between the low shrinkage pile and the high shrinkage pile and also excellent heather-like feeling.

[Comparative Example 3]
Using a polyethylene terephthalate chip containing 0.30% by weight of TiO ₂ having an intrinsic viscosity of 0.67 as a draw yarn on the low shrinkage yarn side of the pile, it is melted and discharged from a rectangular cross-section die having an aspect / width ratio of 1 / 3.0. After spinning, heat setting-drawing is repeated to form a highly oriented undrawn yarn of 130 dtex-72fil in a manufacturing process of winding up the package at 2400 m / min. Produced a 83dtex-72fil draw yarn.

Melting using a cationic dyeable polyethylene terephthalate chip containing an intrinsic viscosity of 0.66 and TiO _{2 of} 0.30% by weight as a fiber on the pile high shrinkage yarn side, discharging from a round cross-section die, spinning, and heat setting and stretching. The yarn was wound up into a package at 3000 m / min to give a highly oriented undrawn yarn of 134 dtex-24fil. The highly oriented unstretched yarn was subjected to Indolaw false twisting at a heating roll temperature of 100 ° C., a stretching ratio of 1.67 times, and a number of false twists of 2850 t / m, to produce a crimped and highly shrinkable yarn of 85 dtex-24fil.

  The compounding process was a mixed fiber composite yarn under the same model and conditions as in Example 3.

  In the composite processed yarn, the entangled portion and the non-entangled portion are randomly present in the length direction of the yarn, and the characteristics of each are as follows.

Pile low shrinkage yarn crimp expression elongation rate;
Dry heat shrinkage: 5.2%
Pile high shrinkage yarn Crimp onset elongation rate: 6.5%
Dry heat shrinkage: 21.3%
Composite processed yarn Crimp onset elongation rate: 4.6%
Number of confounds / non-confounds: 1.4 / 1.5 / 2.54 cm
In the same manner as in Example 3, a raised pile fabric / product exhibiting a multi-step pile form is obtained by performing ground dyeing, pile fiber shrinkage, and crimping in the process of manufacturing and raising the pile pile fabric.

  In the mixed fiber composite yarn, the low shrinkage pile has a draw yarn having a rectangular cross section with an aspect ratio of 1 / 3.0, and the high shrinkage pile has a round cross section, so that the volume increase and diffusion from the pile root are slightly inferior. Insect eating and cracking of the ground were somewhat worrisome.

Further, since the draw yarn is a semi-daltic polyethylene terephthalate chip containing 0.30% by weight of TiO ₂ , the contrast between the low-shrink pile and the high-shrink pile is slightly poor, and the pile fabric has a somewhat unsatisfactory heat and grain feeling. became.

  Since such a combination of semi-dals has a poor clarity, it may not be possible to respond to a brilliant trend demand. Therefore, the products described in the embodiments can be said to be preferable.

[Comparative Example 4]
The low-shrinkage side of the pile uses the crimped yarn of Example 4 in which low shrinkage and low crimping are performed, and the special crimped yarn of the high shrinkage side of the pile uses that of Example 3.

  Each of them was supplied from a separate package and subjected to ply twisting at a twist number of 150 t / m, and this was used as a pile yarn to produce a napped pile fabric in the same manner as in Example 1. In other words, the low-shrinkage / low-crimp yarn and the crimped / high-shrinkage yarn have a form in which two yarns and fibers are not mixed.

Pile low shrinkage yarn Crimp expression elongation rate; 4.8%
Dry heat shrinkage: 4.3%
Pile high shrinkage yarn crimp expression elongation rate; 4.7%
Dry heat shrinkage: 22.0%
Twisted Yarn Crimp onset / elongation rate: 6.7%
Number of twists: 150 t / m
In the subsequent steps, as in Example 3, a raised pile fabric / product in a multi-step pile form was obtained by producing ground dyeing, pile fiber shrinkage, and crimping in the raised pile fabric production and dyeing process.

  The low-shrinkage / crimped yarn of Example 4 and the crimped high-shrinkage yarn were plied at a twist number of 150 t / m. Using this as a raised pile, a raised pile fabric was produced in the same manner as in Example 3. That is, the low-shrinkage / crimped fiber and the crimped / high-shrinkage yarn have a form in which the fibers are not mixed or entangled.

  Since the obtained nap pile fabric is not mixed and entangled, each of the low-shrinkage / crimped fibers and the crimped / high-shrinkage fibers constitutes a single form. As a result, the surface quality was poor in covering properties. In addition, although a dry feeling and a soft feeling were recognized, it was not possible to express a heather feeling excellent in spanning texture and graininess.

  It is recognized that the formation of the interlaced portion-non-entangled portion by the air entangling method is effective for expressing a heather feeling excellent in spanning texture and graininess.

  Table 3 shows the composition and evaluation results of the raw yarn and the pile yarn used in the present invention.

  Table 4 shows the results of evaluation of the raised pile fabric of the present invention.

It is the schematic which shows an example of the side structure of the mixed fiber pile yarn of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic side view which shows an example of the multi-step pile structure of the raised pile fabric of this invention.

Explanation of reference numerals

A: Polyester fiber on the low crimp side B: Polyester fiber on the crimped / highly shrinkable side C: Pile fiber on the low crimped side D: Pile fiber on the crimped / highly shrunk side E: With the fiber on the low crimped side Fangled portion with crimped / highly shrinkable fiber F: ground cloth of nap pile fabric

Claims (5)

In a napped pile fabric formed by a cut pile composed of a synthetic fiber multifilament yarn, the synthetic fiber multifilament yarn is composed of a multifilament mixed yarn composed of at least two types of polyester fibers having a difference in shrinkage, and has a high shrinkage side. The polyester fiber is crimped and has a crimp development and elongation ratio of 1 to 40%, and sinks from the pile surface to form a multi-step pile, and the polyester fiber on the low shrinkage side is present on the pile surface side. A raised pile fabric characterized by the above. The multifilament mixed yarn comprising at least two types of polyester fibers forming the nap pile has a dry heat shrinkage difference between the polyester fiber on the high shrinkage side and the polyester fiber on the low shrinkage side of 15% or more, and The polyester fiber on the shrinking side has a dry heat shrinkage of 15% or more, and entangled portions and non-entangled portions are randomly present in the fiber axis direction, and the number of each of the entangled portion and the non-entangled portion is 2.54 cm ( 2. The raised pile fabric according to claim 1, wherein there is at least one raised pile per inch. The raised pile fabric according to claim 1 or 2, wherein the polyester fiber on the high shrinkage side is a cationic dyeable polyester fiber. The raised pile fabric according to any one of claims 1 to 3, wherein the polyester fiber on the low shrinkage side has a flat cross-sectional shape. In a pile yarn used for a nap pile fabric formed by a cut pile composed of a synthetic fiber multifilament yarn, the synthetic fiber multifilament yarn is a multifilament mixed yarn composed of at least two types of polyester fibers having a difference in shrinkage rate. The multifilament mixed yarn comprising at least two kinds of polyester fibers has a difference in dry heat shrinkage of the polyester fiber on the high shrinkage side and the polyester fiber on the low shrinkage side of 15% or more, and the polyester on the high shrinkage side. The fiber has a property of a dry heat shrinkage of 15% or more and a crimp development and elongation of 1% or more, and entangled portions and unentangled portions are randomly present in the fiber axis direction. A standing hair pie, wherein at least one part is present per 2.54 cm (1 inch). Thread.

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