Molding yarn, textile products, clothing and bedding

Abstract

To provide a chenille yarn, which is preferably used as padding for clothing and bedding and excellent in bulkiness, and a fiber product using the same.SOLUTION: A twist yarn of a core yarn and a press yarn is used in a chenille yarn. A filament is fused and fixed between the core yarn and the press yarn, and the filament has a crimp with curvature radius of 0.5 mm or more and 5.0 mm or less in the chenille yarn.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a bulky yarn, a fiber product, clothing, and bedding, which are suitably used for stuffing clothing and bedding.

Background Art

[0002] It is no exaggeration to say that the new technology of synthetic fibers has been innovated with the motivation of imitating natural materials. In order to express the functions derived from the complex structural forms of natural materials, various technical proposals have been made. Natural feathers are used in a wide range of products such as bedding and pillows and clothing such as cold-proof clothing due to their excellent balance characteristics, and are widely used as high-functional intermediate cotton.

[0003] On the other hand, regarding synthetic fiber intermediate cotton, which emphasizes the functionality and stable supply unique to synthetic fibers, there are many technical proposals in various material forms such as felt cotton, granular cotton, and long fiber cotton. Regarding achieving both the mechanical properties such as the bulkiness and compression recovery of feathers and the unique soft texture of feathers, there are some technical proposals in the form of long fiber cotton obtained by bundling bulky processed yarns having large loops. However, such long fiber cotton having large loops has problems such as the loops of the processed yarns constituting the cotton meshing with each other and being prone to snagging.

[0004] When filling the product with long fiber cotton, it is difficult to adopt the method of blowing with air like feathers. Therefore, in many cases, although the method of sewing after arranging the long fiber cotton on the cloth in advance is adopted, when pulling out the cotton from the packing case or the like, process troubles such as thread breakage are likely to occur, and improvement in handleability is desired. It has been required to make the bulky yarns constituting the long fiber cotton into a form with excellent handleability.

[0005] As a form of the bulky yarn that constitutes the long fiber cotton for solving such problems, as an example other than the processed yarn in which the core yarn and the sheath yarn are intertwined and fixed by fluid processing, there is a moire yarn in which the core yarn and the holding yarn are twisted together and a decorative yarn is sandwiched between the core yarn and the holding yarn. In Patent Document 1, a moire yarn in which a yarn strip for a decorative yarn having a predetermined length is sandwiched between a core yarn and a core holding yarn, and the yarn strip for the decorative yarn is cut and the core yarn and the core holding yarn are twisted together, and a knitted or woven fabric using the moire yarn have been proposed. However, the moire yarn described in Patent Document 1 is mainly a moire yarn applicable to knitted or woven fabrics, and the curvature radius of its decorative yarn is small and its bulkiness is insufficient.

[0006] In Patent Document 2, a filter material obtained by cutting a moire yarn in which voids are formed by melting and discharging a fusing component during heat welding after forming the moire yarn and fluffing the twisted yarn has been proposed. The moire yarn used in Patent Document 2 is a moire yarn in which a twisted yarn obtained by blending a high melting point polyester staple fiber and a core-sheath composite staple fiber having a high melting point polyester core yarn and a low melting point polyester sheath yarn is used for the core yarn, the holding yarn, and the decorative yarn. Since the short fibers made of the high melting point polyester that constitute the twisted yarn of the moire yarn fluff up and good porosity can be ensured, the suspended substances in the drainage can be efficiently captured. However, since the purpose of Patent Document 2 is a filter material, and the decorative yarn also contains a fusing component and a twisted yarn is used to fluff the constituent yarns, the moire yarn has a high density and low bulkiness.

[0007] In Patent Document 3, a moire yarn has been proposed in which a synthetic fiber in which a reversible thermochromic pigment having an average particle diameter of 0.1 to 30 μm is fixed in a dispersed state at a ratio of 0.1 to 30% by weight is used as a decorative yarn, which shows a reversible color change in the living environment temperature range, the repeated thermochromic function is continuously exhibited, and the original soft texture of the moire yarn is also maintained. Since Patent Document 3 essentially requires the inclusion of a reversible thermochromic pigment and is used as a fancy yarn, it has insufficient bulkiness as a stuffing for clothing and bedding.

[0008] In Patent Document 4, a spun yarn is proposed in which the core yarn is a parallel composite yarn of polypropylene and polyethylene or a composite yarn of polypropylene and polyethylene blended with nylon, and the fancy yarn is a chenille yarn obtained by a known processing method using a nylon spun yarn, a woolen yarn, a polyacrylonitrile spun yarn, or a cotton spun yarn. Patent Document 4 contains a predetermined amount of thermally adhesive composite fibers, thereby strengthening the fixation of the fancy yarn by fusion and providing a chenille yarn in which the fancy yarn is difficult to come off. Since there is little shedding of the fancy yarn, materials that were conventionally difficult to use can be used for the fancy yarn. However, it is a conventional chenille yarn used for conventional applications and has insufficient bulkiness as a stuffing for clothing and bedding.

Prior Art Documents

Patent Documents

[0009]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0010] According to the prior art, although bulkiness required when used as a decorative yarn, a mop, a mat, etc. for use as a moire yarn can be obtained, when used as a stuffing for clothing and bedding, all of them have a high density and insufficient bulkiness.

[0011] An object of the present invention is to provide a moire yarn, a fiber product, clothing, and bedding that are bulky, have a low density, can also be used as a stuffing for clothing and bedding, and have excellent handleability when filled as a stuffing.

Means for Solving the Problems

[0012] In order to solve the above problems, the fluff yarn, fiber product, clothing, and bedding of the present invention have the following configurations (1) to (9). (1) A fluff yarn using a twisted yarn of a core yarn and a pressing yarn, wherein a decorative yarn is fusion-fixed between the core yarn and the pressing yarn, and the decorative yarn has a curl with a curvature radius of 0.5 mm or more and 5.0 mm or less. A fluff yarn characterized by this. (2) The fluff yarn according to (1), wherein the decorative yarn is a hollow cross-section fiber including a hollow part. (3) The fluff yarn according to (1) or (2), wherein the decorative yarn is a fiber composed of a single component. (4) The fluff yarn according to any one of (1) to (3), wherein the interval between the fusion-fixing positions of the decorative yarn is 1.0 mm or more and 4.0 mm or less. (5) The fluff yarn according to any one of (1) to (4), wherein the length of the decorative yarn is 20 mm or more and 40 mm or less. (6) The bulkiness is 90 cm 3 / g or more. The fluff yarn according to any one of (1) to (5), characterized by this. (7) A fiber product using the fluff yarn according to any one of (1) to (6). (8) Clothing provided with a stuffing using the fluff yarn according to any one of (1) to (6). (9) Bedding provided with a stuffing using the fluff yarn according to any one of (1) to (6).

Effect of the Invention

[0013] According to the present invention, it is possible to provide a fluff yarn that is bulky, low density, and excellent in handleability when used as a stuffing for filling, etc., and fiber products such as clothing and bedding using this fluff yarn.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, the present invention will be described in detail together with preferred embodiments. As shown in FIG. 1, the decorative yarn 10 of the present invention is a decorative yarn in which the decorative yarn 1 is sandwiched between the core yarn 2 and the pressing yarn 3 and twisted together, and the decorative yarn is fused and fixed. The decorative yarn 10 mentioned here is a processed yarn formed by sandwiching the decorative yarn 1 between the core yarn 2 and the pressing yarn 3 and twisting them together. In the present invention, the same yarn or different yarns may be used for the core yarn 2 and the pressing yarn 3. For example, when the same yarn is used for the core yarn 2 and the pressing yarn 3, in the present invention, either one is used as the core yarn 2 and the other is used as the pressing yarn 3. The core yarn 2 and the pressing yarn 3 may be formed by combining a plurality of yarns.

[0016] In the present invention, the decorative yarn 1 is fused and fixed between the core yarn 2 and the pressing yarn 3. However, either one or both of the core yarn 2 and the pressing yarn 3 may be fusible yarns, or both the core yarn 2 and the pressing yarn 3 do not have fusibility. As shown in FIG. 1, another fusible yarn 4 may be used together with the core yarn 2 and the pressing yarn 3 to fuse and fix the decorative yarn 1. Also, in the specification of the present invention, when explaining the configuration of the decorative yarn 10, there is also a part where the state in which the core yarn 2, the pressing yarn 3, and the fusible yarn 4 are twisted together is shown as the core yarn.

[0017] The core yarn 2, the pressing yarn 3, and the decorative yarn 1 constituting the decorative yarn of the present invention are preferably made of synthetic fibers. Synthetic fibers are fibers made of polymer polymers, and fibers made of thermoplastic polymers produced by melt spinning or solution spinning can be adopted. The single fibers constituting the synthetic fibers may be fibers composed of a single component and composite fibers in which two or more polymers are arranged in the fiber cross section.

[0018] Examples of the thermoplastic polymers that constitute the synthetic fiber include melt-moldable polymers such as polyethylene terephthalate or its copolymers, polyethylene naphthalate, polybutylene terephthalate, polytrimethylene terephthalate, polypropylene, polyolefin, polycarbonate, polyacrylate, polyamide, polylactic acid, and thermoplastic polyurethane. Among these thermoplastic polymers, polycondensation polymers typified by polyester and polyamide have crystallinity and relatively high melting points, so they are suitable examples because the bulky yarn does not deteriorate or sag even when heated at a relatively high temperature during heat treatment processes in post-processing, etc. and actual use (such as cleaning). From the viewpoint of this heat resistance, it is particularly preferable that the melting point of the thermoplastic polymer is 165 °C or higher.

[0019] These thermoplastic polymers may contain various additives such as inorganic substances such as titanium oxide, silica, and barium oxide, colorants such as carbon black, dyes, and pigments, flame retardants, fluorescent brighteners, antioxidants, or ultraviolet absorbers, as long as the effects of the present invention are not impaired.

[0020] As the core yarn 2 and the pressing yarn 3 used in the decorative yarn 10 of the present invention, those having excellent handleability such as being difficult to break when pulling out the decorative yarn from a bobbin, a packaging bag, etc. during filling the fibrous product which is the filling body are preferable. As the thermoplastic polymer having excellent tensile strength, polyamides such as polyethylene terephthalate, nylon 6, nylon 66, and nylon 610 can be mentioned. Further, from the viewpoint of imparting flexibility as a decorative yarn in addition to the tensile strength, polyamide is more preferable, and from the viewpoint of heat resistance when fusing and fixing the fancy yarn, nylon 66 is even more preferable.

[0021] As the decorative yarn 1 used in the pile yarn 10 of the present invention, it is preferable to use a fiber excellent in rigidity in order to exhibit sufficient bulkiness as a filling material such as clothing and bedding. Polyester such as polyethylene terephthalate is more preferable as a material that easily obtains rigidity, and from the viewpoint of heat resistance similar to the core yarn and the holding yarn, polyethylene terephthalate is even more preferable.

[0022] In the pile yarn 10 of the present invention, the cross-sectional shape of the synthetic fiber used for the core yarn 2, the holding yarn 3, and the decorative yarn 1 may have any shape, and examples include a round cross-section, a triangular cross-section, a cross shape, a Y shape, a multi-leaf shape, a flat shape, a multi-fin shape, and those including a hollow part. It may be a single-component fiber made of a single polymer or a composite fiber made of two or more polymers.

[0023] In particular, regarding the decorative yarn 1 used in the present invention, in order to ensure bulkiness, it is preferably a shape in which the volume per fineness can be increased. It is preferable to use a fiber having a hollow part in a cross-section perpendicular to the fiber length direction and the hollow part being continuous in the fiber length direction. The cross-section of the fiber having the hollow part may be a round cross-section, and since it has a fine fineness, that is, it is lightweight and easy to increase the volume, it is preferable to use a fiber having a cross-section such as a Y shape, a multi-leaf shape, a flat shape, a multi-fin shape, etc., and including a hollow part.

[0024] In addition, in order to enhance the bulkiness of the pile yarn 10, when using a hollow cross-section fiber including a hollow part as the decorative yarn 1, it is preferable to use a synthetic fiber made of a single-component fiber. As will be described later, in order to enhance the bulkiness, the radius of curvature indicating the degree of crimp of the decorative yarn 1 is important. By using a fiber composed of a single component, in addition to the viewpoint of enhancing the fiber rigidity described above, it is preferable in that it becomes easier to adjust the radius of curvature depending on spinning conditions such as the cooling air temperature and wind speed, and heat treatment conditions when heat-treating the pile yarn.

[0025] In the plush yarn 10 of the present invention, the decorative yarn 1 is sandwiched between the core yarn 2 and the pressing yarn 3 and fused and fixed. As a result, when filling the plush yarn 10 as a stuffing for a textile product, the drawability during filling and the falling off of the decorative yarn 1 are suppressed when forming the plush yarn 10 by weaving or knitting in advance according to the product form, leading to an improvement in the handleability of the plush yarn 10.

[0026] As the core yarn 2 and the pressing yarn 3, when the core yarn 2 has fusibility or the pressing yarn 3 has fusibility, it is necessary to remain in the plush yarn 10 as the core yarn 2 or the pressing yarn 3 even after fusion fixing and sandwich the decorative yarn 1. Therefore, it is preferable to use a core-sheath type composite fiber in which the core is made of a high melting point component and the sheath is made of a low melting point component. Further, when the core yarn 2 and the pressing yarn 3 do not contain a fusing component, it is preferable to add the fusing yarn 4 to either or both of the core yarn 2 and the pressing yarn 3 and supply it to a twisting machine. As the fusing yarn 4 in this case, a single-component fusing yarn composed of the aforementioned core-sheath type composite fiber, a polyester-based low melting point polymer, and a polyamide-based low melting point polymer is given as a preferable example. Further, in order to firmly adhere and fix the decorative yarn 1, a single-component fusing yarn 4 composed only of a fusing component is more preferable. Further, in order to ensure the bulkiness of the plush yarn 10 as in the present invention, it is preferable to suppress excessive shrinkage of the decorative yarn 1 itself, and those that can achieve fusion fixing by low-temperature and short-time treatment are suitable. From this viewpoint, a single-component fusing yarn 4 made of a polyamide-based low melting point polymer is more preferable.

[0027] The decorative yarn 1 of the plush yarn 10 of the present invention preferably has crimps and at least a part thereof is fibrillated. This crimp indicates that the decorative yarn 1 has a spiral structure, and a fiber having a spiral structure similar to a spring has recoverability and repellency against elongation deformation and compression deformation. By having such a structure, the decorative yarn 1 repels between the single yarns of the decorative yarn 1, and the decorative yarn 1 is easily fibrillated for each single yarn, and the tip of the decorative yarn 1 tends to face in all directions of the cross section perpendicular to the longitudinal direction of the plush yarn 10. As a result, the excluded volume as the plush yarn 10 increases, leading to an improvement in bulkiness when used as a stuffing.

[0028] The yarn 1 is a multifilament, and it is preferable to use a multifilament in the range of 2 or more and 300 or less filaments. The number of filaments of the yarn 1 is more preferably 4 or more and 100 or less. If it is in such a range, the yarn 1 with crimps does not overly overlap, and the individual filaments are moderately wound around the core yarn 2 in a state where they are split, resulting in excellent bulkiness and an appropriate sense of resilience against compression. To facilitate splitting between the individual filaments of the yarn 1, the number of filaments of the yarn 1 is more preferably 8 or more and 50 or less. The single-filament fineness of the yarn 1 is preferably in the range of 0.01 dtex or more and 20 dtex or less. The single-filament fineness of the yarn 1 is more preferably 1 dtex or more and 15 dtex or less. If it is in such a range, in addition to excellent bulkiness and an appropriate sense of resilience against compression, it will have a soft touch. From such a perspective, the single-filament fineness of the yarn 1 is more preferably 2 dtex or more and 8 dtex or less.

[0029] Also, when the pile yarn 10 of the present invention is combined into a yarn bundle and filled into a fiber product as a stuffing, the resilience of the pile yarn 10 of the present invention exhibits a good touch of the fiber product, and when repeated compression and recovery are applied, the yarn 1 also recovers like a spring, so it is also suitable from the perspective of suppressing sagging.

[0030] In the present invention, it is preferable that the radius of curvature indicating the size of the crimp of the yarn 1 is in the range of 0.5 mm or more and 5.0 mm or less. The radius of curvature of the yarn 1 is more preferably 0.8 mm or more and 4.0 mm or less. If it is in such a range, it can exhibit sufficient bulkiness and has an appropriate sense of resilience against compression. From such a perspective, the radius of curvature of the yarn 1 is more preferably 1.0 mm or more and 3.0 mm or less.

[0031] The radius of curvature mentioned here is evaluated using an image two-dimensionally observed by a digital microscope or the like, and as shown in Fig. 2, it is the radius of the curved portion formed by the single fibers constituting the yarn 1 having a spiral structure. Specifically, at 10 randomly selected locations in the longitudinal direction of the mohair yarn 10, single fibers constituting 10 or more yarns 1 are collected respectively, and each single fiber is observed at a magnification at which the crimped form can be confirmed by a digital microscope or the like. By using this observed image to measure the radius of the curved portion formed by the single fiber having a spiral structure, the radius of curvature of the yarn 1 can be measured.

[0032] In order to enhance the bulkiness of the mohair yarn 10 of the present invention, as described above, fibers having a hollow portion in the fiber cross-section are preferably used as the yarn 1. By performing asymmetric cooling during spinning, the fiber orientation difference caused by the cooling difference within the single fiber cross-section is likely to occur in the fiber containing the hollow portion, and fibers having apparent crimp can be easily obtained even with a single component. The degree of apparent crimp in this case is a loose crimp on the order of several millimeters to several tens of millimeters as the radius of curvature described later, but by keeping it in a loose crimp form at the time of mohair processing, the single fibers of the yarn 1 are easily separated. Further, by heat-treating the mohair yarn, crimp is further developed, and by setting the radius of curvature indicating the size of the crimp of the yarn 1 in the range of 0.5 mm or more and 5.0 mm or less, it effectively acts to improve the bulkiness of the final mohair yarn 10.

[0033] The crimp obtained by such asymmetric cooling can be appropriately adjusted particularly by the cooling conditions immediately after discharge and the draw ratio during spinning. Regarding the adjustment of the cooling air velocity, which is one of the cooling conditions, for example, when using a 12-hole spinneret for hollow fibers and taking up at a spinning speed of 1000 to 2000 m / min, it is preferable to cool and solidify by blowing cooling air at a temperature of 20°C from one side in the air velocity range of 20 to 100 m / min. Since increasing the air velocity makes the discharged yarn strip more likely to sway and is likely to cause a decrease in operation stability, it is more preferably in the range of 25 to 80 m / min, and even more preferably in the range of 30 to 70 m / min.

[0034] Note that depending on the temperature of the cooling air, the fiber diameter immediately after extrusion during spinning, the number of spinning filaments, the arrangement of the die discharge holes, etc., the way the cooling air hits each single filament and the difference in cooling rate between the surface receiving the cooling air and the opposite surface change, and the appropriate cooling air velocity conditions also change. Therefore, for example, when the number of filaments is large, uneven cooling is likely to occur for each single filament, and in the single filaments with insufficient cooling, the radius of curvature tends to be large, so it is preferable to set a higher wind speed. On the other hand, when the number of filaments is small, since the radius of curvature tends to be small due to the increased cooling efficiency, it is preferable to set a lower cooling air velocity. It is preferable to perform a heat treatment test under desired conditions assuming the heat treatment of the moire yarn on the raw yarn wound after spinning and drawing, and appropriately adjust the cooling conditions while checking the crimp form.

[0035] It is preferable that the distance between the fusion fixing positions of the decorative yarn 1 sandwiched between the core yarn 2 and the pressing yarn 3 of the moire yarn 10 of the present invention is 1.0 mm or more and 4.0 mm or less. When the distance between the decorative yarns 1 is within the above range, the decorative yarns with crimps do not overlap excessively, the single filaments are appropriately wound around the core yarn 2 in a state where they are fibrillated, and the tips of the decorative yarns 1 can be made to protrude more in the outer peripheral direction in the cross section of the moire yarn 10. By arranging the decorative yarn 1 in this way, when the moire yarns 10 of the present invention are bundled and used, the moire yarns 10 repel each other with the adjacent moire yarns 10 in all directions of the yarn cross section, and the bulkiness as a stuffing material or the like can be enhanced. From such a viewpoint, the distance between the fusion fixing positions of the decorative yarn 1 is more preferably 1.3 mm or more and 3.5 mm or less, and further preferably in the range of 1.5 mm or more and 3.0 mm or less.

[0036] As shown in FIG. 3, the distance between the fusion fixing positions of the decorative yarn 1 is observed at a magnification at which at least two points where the decorative yarn 1 sandwiched between the core yarn 2 and the pressing yarn 3 can be confirmed by unwinding the decorative yarn 1 wound around the core yarn 2 of the moire yarn 10 and directing it in a direction perpendicular to the core yarn 2 and using a digital microscope or the like. Using this observation image, the distance between the two points from the center point of the decorative yarn 1 at one fusion position to the center point of the other decorative yarn 1 is measured to confirm the distance at that location.

[0037] For the mohair yarn 10 of the present invention, it is preferable that the length of the fancy yarn 1 is 20 mm or more and 40 mm or less. When the length of the fancy yarn 1 is within the above range, the curly fancy yarn 1 can be appropriately wound around the core yarn 2, and the tips of the fancy yarn 1 can be arranged to face in all directions in the cross-section of the mohair yarn. Moreover, as a range that has a good balance with the degree of curl of the fancy yarn 1 and effectively contributes to the improvement of bulkiness, the length of the fancy yarn 1 is more preferably 25 mm or more and 35 mm or less, and even more preferably 27 mm or more and 33 mm or less. The length of the fancy yarn 1 can be confirmed by unwinding the fancy yarn 1 wound around the core yarn 2 of the mohair yarn 10, aligning it in a direction perpendicular to the core yarn 2, stretching and fixing the fancy yarn 1, and measuring the length of the fancy yarn 1, in the same way as checking the interval between the fusion fixing points of the fancy yarn 1.

[0038] The mohair yarn 10 of the present invention preferably has a bulkiness of 90 cm 3 / g or more. When the bulkiness of the mohair yarn 10 is 90 cm 3 / g or more, it is bulky and has a low density, so it also has excellent deformation recovery properties and can be suitably used as a stuffing material or the like. Also, the higher the bulkiness, the more air can be taken in as a stuffing material, so excellent heat retention properties can be exhibited. Therefore, the bulkiness of the mohair yarn 10 is more preferably 150 cm 3 / g or more, and even more preferably 200 cm 3 / g or more. In the textured yarn of the form like the mohair yarn 10 of the present invention, the substantial upper limit of the bulkiness is about 300 cm 3 / g.

[0039] Regarding the bulkiness of the mohair yarn, weigh 10 g of the mohair yarn 10 in a container placed on an electronic balance, put the weighed mohair yarn into a cylindrical container with an inner diameter of 15 cm, place a circular plate whose mass is adjusted to 0.15 g / cm 2 with respect to the cross-sectional area inside the cylinder on the mohair yarn, leave it for 1 minute, and then measure the height (L0) of the mohair yarn. From this height, the volume of the mohair yarn per unit mass (= bulkiness) was calculated from the following formula. Bulkiness (cm 3 / g) = Cross-sectional area inside the cylinder × L0 / Mass of the mole yarn

[0040] The mole yarn 10 of the present invention is excellent in handleability when being pulled out from the product form when filled as a stuffing. To achieve excellent handleability, the mechanical properties of the mole yarn 10, particularly the tensile strength, are important. In order to be able to handle the mole yarn 10 without breaking it even when there are some snags or the like, the tensile strength is preferably 100 cN or more, more preferably 300 cN or more, and even more preferably 500 cN or more. Although a higher tensile strength is preferable, if the tensile strength is too high, the elongation will decrease. Therefore, when used as a stuffing for clothing and bedding, the feel of the core yarn 2 of the mole yarn 10 will become prominent, and a foreign object feeling may be felt inside the stuffing. Therefore, as a range in which the mole yarn 10 can be stably handled without affecting the tactile sensation as a stuffing, the substantial upper limit of the tensile strength is preferably 1000 cN. The tensile strength referred to here is the strength at the time of cutting when evaluated according to the standard time test method of tensile strength described in JIS L1013:2010.

[0041] The mole yarn 10 of the present invention can be manufactured using a conventionally known mole yarn twisting machine, for example, it is possible to use a mole yarn twisting machine as shown in JP-A-53-6642. Supply the fancy yarn 1 to the flyer part of the mole yarn twisting machine, attach the fused yarn 4 to one of the core yarn 2 and the pressing yarn 3, and supply the core yarn 2 and the pressing yarn 3 from two directions. The mole yarn 10 of the present invention has the feature that the fancy yarn 1 is long in order to exhibit bulkiness, and the fancy yarn 1 is excessively supplied to the core yarn 2 and the pressing yarn 3. The supply speed ratio (core yarn: fancy yarn) of the core yarn 2, the pressing yarn 3 and the fancy yarn 1 is preferably adopted to be 1:3 or more. This supply speed ratio is controlled by each supply roll of the mole twisting machine. The supply speed ratio of the core yarn 2, the pressing yarn 3 and the fancy yarn 1 is more preferably 1:5 or more, and even more preferably 1:10 or more from the viewpoint of efficiently manufacturing a bulky mole yarn without significantly reducing the production speed.

[0042] After the yarn 1 is wound around the guide piece, it is divided into two by a cutter below the guide piece. The two divided yarns 1 are respectively sandwiched between the core yarn 2 and the pressing yarn 3, and are wound up while being twisted together. Here, in order to make the interval between the yarn 1 sandwiched between the core yarn 2 and the pressing yarn 3 be 1.0 mm or more and 4.0 mm or less, the supply speeds of the core yarn 2, the pressing yarn 3, and the yarn 1, the twist number set by the rotation speed of the winding spindle, and the winding speed are appropriately adjusted. Also, in order to make the length of the yarn 1 be 20 mm or more and 40 mm or less, the cutting position is appropriately adjusted according to the width length of the lower end portion of the guide piece and the installation height of the cutter.

[0043] Next, the wound moire yarn is heat-treated to melt the fused yarn 4, and the yarn 1 is fused and fixed between the core yarn 2 and the pressing yarn 3. The moire yarn 10 subjected to moire processing is wound into skeins of a predetermined mass by a skein winding machine, and a plurality of skeins are hooked on the rod of a transport cart equipped with a skein hanging rod. The transport cart is, for example, put into a pressurized steam heat treatment furnace for a pressurized steam treatment of 98°C × 10 minutes or more (steam pressure of about 0.07 MPa), or put into a dry heat treatment furnace for dry heat treatment to melt the fused yarn 4 and fuse and fix the yarn 1 between the core yarn 2 and the pressing yarn 3.

[0044] The heat treatment temperature and treatment time may be adjusted so that the fused fixing of the yarn 1 is in a desired state, and are appropriately adjusted according to the fused component used so that the fused component is sufficiently melted and can penetrate into the core yarn 2. Here, when manufacturing the moire yarn 10 of the present invention, in order to suppress excessive shrinkage of the yarn 1, the heat treatment temperature is preferably 200°C or lower, more preferably 150°C or lower, and still more preferably 120°C or lower.

[0045] The untreated mohair yarn wound in a skein is subjected to pressurized steam treatment while being hooked on a rod. Therefore, the heavier the weight of the skein, the easier it is for the fancy yarn 1 to be crushed at the hooked portion. For this reason, it is preferable that the winding amount of the skein is 400 g or less. By setting the winding amount of the mohair yarn wound in a skein to 400 g or less, even when the weight of the skein is added during the pressurized steam treatment, the swelling feeling of the fancy yarn 1 at the hooked portion can be maintained, and sufficient bulkiness can be obtained. More preferably, the winding amount of the skein is 300 g or less, and even more preferably 200 g or less.

[0046] The mohair yarn 10 of the present invention can be used in various forms such as a skein obtained by heat treatment processing, a package obtained by rewinding the skein, a yarn bundle in which a plurality of yarns are aligned, cut fibers, a woven or knitted fabric, etc., to form various fiber products. Examples of the fiber products mentioned here include general clothing, sports clothing, clothing materials, quilts and futons such as hanging quilts and floor futons, bedding and sleeping bags such as thin blankets, carpets, sofas, interior products such as curtains, and vehicle interior products such as car seats. Among them, it is preferably used as a stuffing for clothing and bedding.

[0047] In particular, the mohair yarn 10 of the present invention is excellent in bulkiness while being excellent in drawability during filling and handleability during knitting or weaving processing. It can be used as a yarn bundle in which several to several tens of yarns are combined, or it can be used as a stuffing after being knitted or woven in advance. Further, the mohair yarn 10 of the present invention can be used in combination with other batting materials that can be used for stuffing, and a stuffing having material characteristics other than the mohair yarn 10 of the present invention can be obtained.

Examples

[0048] Hereinafter, the mohair yarn of the present invention and its effects will be specifically described with reference to examples. In the examples and comparative examples, the following evaluations were performed.

[0049] A. Fineness The mass of 100 m of the fiber was measured and multiplied by 100 to calculate the fineness. This was repeated 10 times, and the value obtained by rounding off the second decimal place of the simple average was taken as the fineness (dtex) of the fiber.

[0050] B. Curvature radius of the fancy yarn The fancy yarn wound around the core yarn was unwound so that the point pinched by the core yarn was visible, and the single fiber constituting the fancy yarn was collected by cutting at a position about 1 mm from the point pinched by the core yarn. At 10 randomly selected locations in the longitudinal direction of the moire yarn, 10 single fibers were collected at each location, and each single fiber was observed at a magnification at which the crimp morphology could be observed using a Keyence microscope VHX-6000. Using this observation image, the radius of the curved portion formed by the fiber having a spiral structure was measured. A total of 100 curved portion radii were measured, and the value obtained by rounding off the second decimal place of this simple average was taken as the curvature radius (mm) of the fancy yarn.

[0051] C. Spacing between fusion fixing points of the fancy yarn The moire yarn was attached to black paper, the fancy yarn wound around the core yarn was unwound, and the sample was adjusted so that the point where the fancy yarn was sandwiched between the core yarn and the holding yarn could be observed in a direction perpendicular to the core yarn. This sample was observed at 50 times magnification using a Keyence microscope VHX-6000, and the spacing between adjacent fixing points of the fancy yarn was measured. This was repeated for 10 locations, and the value obtained by rounding off the second decimal place of the simple average was taken as the spacing (mm) between the fusion fixing points of the fancy yarn.

[0052] D. Length of the fancy yarn The moire yarn was attached to black paper, the fancy yarn wound around the core yarn was unwound, and the fancy yarn was stretched and fixed in a direction perpendicular to the core yarn, and the length of the fancy yarn was measured. This was repeated for 10 locations, and the value obtained by rounding off the first decimal place of the simple average was taken as the length (mm) of the fancy yarn.

[0053] E. Bulky property 10 g of the moire yarn was weighed using a container placed on an electronic balance, and the weighed moire yarn was placed in a cylindrical container with an inner diameter of 15 cm. With respect to the cross-sectional area inside the cylinder, 0.15 g / cm 2A circular plate whose mass was adjusted as such was placed on the pile yarn, and after leaving it for 1 minute, the height of the pile yarn was measured. The value up to the first digit after the decimal point was read and designated as the height L0 of the pile yarn. From this height, the volume of the pile yarn per unit mass (= bulkiness) was calculated using the following formula, and the first digit after the decimal point was rounded off to an integer value. Bulkiness (cm 3 / g) = cross-sectional area inside the cylinder × L0 / mass of the pile yarn

[0054] Example 1 As the core yarn and the holding yarn, one each of nylon 66 fibers (product name “Promilan” 44T - 34f, manufactured by Toray Industries, Inc.) were used, and as the fusing yarn, a polyamide-based fusing fiber (copolymer polyamide fiber: product name “Elder” 22T - 10f, manufactured by Toray Industries, Inc.) was used. Also, polyethylene terephthalate (PET: IV value = 0.6 dl / g, crystallization temperature = 150 °C) was melted at 290 °C, metered by a gear pump, made to flow into a spinning pack, and discharged from a hollow cross-section discharge hole in which three slits (width 0.1 mm) were arranged concentrically. The discharged yarn was cooled and solidified by blowing cooling air at 20 °C from one side at a flow rate of 30 m / min, and a spinning oil agent was applied, and an undrawn yarn was wound up at a spinning speed of 1500 m / min. Subsequently, a hollow fiber (40T - 12f, hollow ratio 30%) made of polyethylene terephthalate that was drawn at a drawing speed of 800 m / min between rollers heated to 90 °C and 140 °C was used as the decorative yarn. Using a conventionally well-known mall yarn twisting machine, with the ratio of the supply speed of the core yarn and the holding yarn to the supply speed of the decorative yarn being 1:13, the decorative yarn was supplied to the flyer part, the fusing yarn was attached to the holding yarn, and the core yarn and the holding yarn were supplied from two directions. The decorative yarn was wound around a guide piece with a width of 30 mm at the lower end, the decorative yarn was cut with a cutter and sandwiched between the core yarn and the holding yarn, and it was twisted and wound up with a spindle so that the number of turns per meter was 250 turns (T / m).

[0055] Subsequently, the pile yarn was wound into skeins of 200 g each using a winding machine, the skein was hooked onto the rod of a transport cart equipped with a hooking bar, and then introduced into a pressurized steam heat treatment furnace. Pressurized steam treatment (steam pressure of about 0.07 MPa) was carried out at 98 °C for 20 minutes to melt the fused yarn and obtain a pile yarn with the flower yarn fused and fixed. The obtained pile yarn was cut into 1 m lengths and weighed, and the fineness was calculated by multiplying this by 10,000. This measurement was repeated 10 times, and the fineness of the pile yarn, obtained by rounding the first decimal place of the simple average value, was 1765 dtex. In Example 1, the radius of curvature of the flower yarn was 1.7 mm, and the interval between the fused and fixed portions of the flower yarn was 2.1 mm. Also, the flower yarn was moderately wound around the core yarn with the single filaments separated, and in the cross-section of the pile yarn, the tips of the flower yarn were visible in almost the entire outer peripheral direction. The pile yarn had a bulkiness of 203 cm 3 / g and was excellent in bulkiness. Also, when 10 of these pile yarns were bundled and held, the touch was soft, it had deformation recovery properties, and it was sufficient for use as a stuffing for clothing and bedding. The results are shown in Table 1.

[0056] Example 2 Regarding the hollow fiber made of polyethylene terephthalate used for the flower yarn, the discharge amount during spinning was changed to 80 T - 12 f. A pile yarn was obtained in the same manner as in Example 1, except that the supply speed of the flower yarn was changed so that the fineness of the pile yarn was the same as in Example 1. The fineness of the obtained pile yarn was 1774 dtex. In Example 2, although the radius of curvature of the flower yarn was 2.4 mm, the crimp state with respect to the fiber diameter became larger than that in Example 1 because the single filament fineness was thick. Also, the bulkiness was 176 cm 3 / g, and the bulkiness was good. However, when 10 of these pile yarns were bundled and held, the touch was hard and had a strong repulsive feeling, but it was usable as a stuffing. The results are shown in Table 1.

[0057] Example 3 As the decorative yarn, a profiled cross-section fiber made of polyethylene terephthalate having a multi-fin type and a hollow part (product name “Octa” 44T-12f manufactured by Teijin Limited) was used. A decorative yarn was obtained in the same manner as in Example 1, except that the supply speed of the decorative yarn was changed so that the fineness of the decorative yarn was the same as that in Example 1. The fineness of the obtained decorative yarn was 1745 dtex. In Example 3, the radius of curvature of the decorative yarn was 1.2 mm, and the interval between the fused and fixed portions of the decorative yarn was 1.9 mm. Similar to Example 1, the single filaments were moderately wound around the core yarn in a state where they were split, and in the cross-section of the decorative yarn, the tips of the decorative yarn were visible in almost the entire outer peripheral direction. Also, the bulkiness was 211 cm 3 / g, and it was excellent in bulkiness. When the 10 decorative yarns were bundled and held, the touch feeling was very soft, and it also had deformation recovery property, which was sufficient for use as a stuffing for clothing and bedding. The results are shown in Table 1.

[0058] Examples 4 and 5 Using the same yarn structure as in Example 1, for the hollow fiber made of polyethylene terephthalate used for the decorative yarn, except that the degree of crimp after heat treatment was changed as shown in Table 1 by changing the cooling air speed under extrusion during spinning, a decorative yarn was obtained in the same manner as in Example 1. In Example 4, the cooling air speed during spinning was set to 80 m / min to make the crimp finer. The radius of curvature of the decorative yarn was 1.0 mm. The decorative yarn was moderately wound around the core yarn, but there were also parts where the single filaments of the decorative yarn were intertwined and formed bundles. Also, the fineness of the decorative yarn was 1760 dtex. The bulkiness of Example 4 was 145 cm 3 / g. When the 10 decorative yarns were bundled and held, the touch feeling had some hard parts, but it was usable as a stuffing. The results are shown in Table 1. In Example 5, the cooling air speed during spinning was set to 20 m / min to increase the crimp. The radius of curvature of the decorative yarn was 4.8 mm, and the entanglement of the decorative yarn around the core yarn was less than that in Example 1. Therefore, unevenness was observed in the direction in which the tips of the decorative yarn protruded. Also, the fineness of the decorative yarn was 1768 dtex. The bulkiness of Example 5 was 110 cm 3 / g. When the plush yarn was held in a bundle of 10, although the touch feeling had unevenness, it was soft as a whole and could be used as a stuffing. The results are shown in Table 1.

[0059]

Table 1

[0060] Comparative Example 1 Polyethylene terephthalate (PET: IV value = 0.6 dl / g, crystallization temperature = 150 °C) was melted at 290 °C, weighed, and allowed to flow into a spinning pack, and was extruded from a spinneret in which discharge holes with a pore diameter of φ0.30 mm were arranged concentrically. The extruded yarn was cooled and solidified by blowing cooling air at 20 °C from one side at a flow rate of 15 m / min, and after applying a spinning finish, an undrawn yarn was wound up at a spinning speed of 1500 m / min. An undrawn yarn was wound up and stretched at a stretching speed of 800 m / min between rollers heated to 90 °C and 140 °C to obtain a solid fiber (40T - 12f, round cross-section), and a plush yarn was obtained in the same manner as in Example 1 except that the solid fiber was used as the decorative yarn. The fineness of the obtained plush yarn was 1766 dtex. The plush yarn of Comparative Example 1 had a straight decorative yarn without crimp (the radius of curvature was expressed as 50.0 mm or more in Table 2) and was not wound around the core yarn, so the plush yarn had a flat cross-section. The length of the decorative yarn was 30 mm, but the bulkiness was as low as 51 cm 3 / g. Even when the plush yarn was made into a bundle of multiple strands, almost no swelling feeling was felt, and it was insufficient for use as a stuffing. The results are shown in Table 2.

[0061] Comparative Example 2 As Polymer A, polytrimethylene terephthalate (3GT: IV value = 1.2 dl / g) was prepared, and as Polymer B, low-viscosity polyethylene terephthalate (PET: IV value = 0.5 dl / g) was prepared. After melting at 280°C, they were weighed and fed into a spinning pack equipped with a composite die, and extruded to form a side-by-side type composite cross-section composed of Polymer A and Polymer B (polymer composite ratio: Polymer A / Polymer B = 50 / 50). The extruded filaments were blown with cooling air at 20°C at a flow rate of 20 m / min from one side for cooling and solidification, and after applying a spinning finish, the undrawn yarns were wound up at a spinning speed of 1500 m / min. The wound-up undrawn yarns were drawn at a draw speed of 800 m / min between rollers heated to 90°C and 140°C to obtain 3GT / PET side-by-side type composite fibers (75T-24f). This fiber was used as the decorative yarn, and a decorative yarn was obtained in the same manner as in Example 1 except that the supply speed of the decorative yarn was changed so that the fineness of the loop yarn was the same as that in Example 1. The fineness of the obtained loop yarn was 1770 dtex. The loop yarn of Comparative Example 2 had a very fine curl with a curvature radius of the decorative yarn of 0.2 mm (average measured value 0.16 mm). Also, the fibrillation between the single filaments of the decorative yarn was insufficient, and there were places where the decorative yarn did not exist in the core yarn axis direction of the loop yarn, resulting in unevenness in the arrangement of the decorative yarn. The length of the decorative yarn was 22 mm, but the bulkiness was 82 cm 3 / g, which was low. When the loop yarns were grasped as a bundle of multiple strands, there was no swelling feeling in the touch, and it was insufficient for use as a stuffing. The results are shown in Table 2.

[0062] Example 6 A loop yarn was obtained in the same manner as in Example 1 except that the width length of the lower end portion of the guide piece for winding the decorative yarn was changed as shown in Table 2. The fineness of the obtained loop yarn was 1761 dtex. In Example 6, the width length of the lower end portion of the guide piece was 20 mm, and the length of the decorative yarn was 19 mm. Although the decorative yarn was wound around the core yarn, since the length was slightly short, there were also parts where the number of decorative yarns wound in the length direction of the core yarn was small. The bulkiness of Example 6 was 96 cm 3 / g, and when the 10 strands of the pile yarn were held together, the touch feeling had some firm parts, and although the swelling feeling was slightly insufficient, it could be used as a stuffing. The results are shown in Table 2.

[0063] Example 7 A pile yarn was obtained in the same manner as in Example 1 except that the twist number when twisting the pile yarn was changed as shown in Table 2. The fineness of the obtained pile yarn was 1765 dtex. Example 7 had a twist number of 350 T / m. The interval between the fused and fixed portions of the fancy yarn was 0.9 mm. The density of the fancy yarn was slightly high, and there were also portions where the single filaments of the fancy yarn were entangled and formed bundles. The bulkiness of Example 7 was 91 cm 3 / g, and when the 10 strands of the pile yarn were held together, the touch feeling was firm, and although the swelling feeling was slightly insufficient, it could be used as a stuffing. The results are shown in Table 2.

[0064] Comparative Example 3 After melting polyethylene terephthalate (PET: IV value = 0.6 dl / g) at 290 °C, it was metered by a gear pump, flowed into a spinning pack, and discharged from a hollow cross-section discharge hole in which three slits (width 0.1 mm) were arranged concentrically. After the discharged yarn was cooled and solidified by blowing 20 °C cooling air from one side at a flow rate of 10 m / min, a spinning finish was applied and an undrawn yarn was wound up at a spinning speed of 1500 m / min. Subsequently, a hollow fiber (40 T - 12 f, hollow ratio 27%) made of polyethylene terephthalate that was drawn at a draw speed of 800 m / min between rollers heated to 90 °C and 140 °C was used as the fancy yarn, and a pile yarn was obtained in the same manner as in Example 1. The fineness of the obtained pile yarn was 1769 dtex. The pile yarn of Comparative Example 3 had a curvature radius of the fancy yarn of 10.5 mm and loose crimps, and in the form of the fancy yarn of the pile yarn, it was almost straight and protruding. Also, the fiber opening between the single filaments of the fancy yarn was insufficient, and there were places where the fancy yarn did not exist in the core yarn axis direction of the pile yarn, resulting in uneven distribution of the fancy yarn. The length of the fancy yarn was 32 mm, but the bulkiness was 75 cm 3 / g was low, and when the mall yarn was grasped as a bundle of multiple strands, there was no swelling feeling in the touch feeling, and it was insufficient for use as a stuffing. The results are shown in Table 2.

[0065]

Table 2

Explanation of symbols

[0066] 1. Pattern yarn 2. Core yarn 3. Pressing yarn 4. Fusing yarn 5. Interval between fusing and fixing positions of pattern yarn

Claims

1. A moire yarn using a twisted yarn of a core yarn and a holding yarn, wherein a decorative yarn is fused and fixed between the core yarn and the holding yarn, and the decorative yarn has a curl with a radius of curvature of 0.5 mm or more and 5.0 mm or less. The moire yarn is characterized by this.

2. The moire yarn according to Claim 1, wherein the decorative yarn is a hollow cross-section fiber including a hollow part.

3. The moire yarn according to Claim 1 or 2, wherein the decorative yarn is a fiber composed of a single component.

4. The moire yarn according to any one of Claims 1 to 3, wherein the interval between the fusion and fixation positions of the decorative yarn is 1.0 mm or more and 4.0 mm or less.

5. The moire yarn according to any one of Claims 1 to 4, wherein the length of the decorative yarn is 20 mm or more and 40 mm or less.

6. The bulkiness is 90 cm ３ / g or more, and the bulk yarn according to any one of claims 1 to 5, characterized in that.

7. A fiber product using the moire yarn according to any one of Claims 1 to 6.

8. A clothing provided with a stuffing using the moire yarn according to any one of Claims 1 to 6.

9. A bedding provided with a stuffing using the moire yarn according to any one of Claims 1 to 6.

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