Fabric containing long and short composite yarns with excellent uniformity

Abstract

The present invention relates to a fabric including a long and short composite yarn, and more specifically, the long and short composite yarn includes short fibers and long fibers, and the short fibers are inserted into the long fibers, so that the long and short composite yarn has excellent uniformity, and the fabric manufactured therefrom has excellent processability and appearance.

Description

[Technical Field]

[0001] The present invention relates to a fabric including a long and short composite yarn. More specifically, the long and short composite yarn includes short fibers and long fibers, and the short fibers are inserted into the long fibers, so that the long and short composite yarn has excellent uniformity, and the fabric manufactured therefrom has excellent processability and appearance. [Background technology]

[0002] A long-short composite yarn is a composite yarn that contains both long fibers and short fibers. With the advancement of technology, the number of industrial fields in which fibers are used has increased, and the functionality of fibers has expanded to meet various consumer preferences.

[0003] Since the long and short composite yarn has the advantage of being able to utilize the respective advantages of long and short fibers, various structures, shapes, and manufacturing methods of long and short composite yarns have been researched. For example, representative conventional manufacturing methods for long and short composite yarns include the siro-spun and siro-fil methods. The siro-spun method has the advantage of being able to handle a variety of fiber mixtures and thus capable of manufacturing long and short composite yarns with various properties, but has the disadvantage of reducing fiber efficiency because the fibers may physically clump or be manufactured irregularly. The siro-fil method has the disadvantage of being difficult to apply to a variety of fiber mixtures, making it difficult to manufacture a variety of long and short composite yarns.

[0004] As described above, the above-mentioned conventional techniques have problems such as reduced formability of the composite yarn or limitations on the types of fibers that can be used depending on the shape or manufacturing method of the composite yarn, and in particular, there is a problem in that short fibers contained in the long and short composite yarns fall off.

[0005] In addition, when fibers made by recycling waste fabrics are used to meet the recent demands of the environmentally friendly recycling market, the length of the recycled fibers is short, which makes it difficult to apply existing ring spinning when manufacturing composite yarns using the recycled fibers.

[0006] Therefore, in the course of research to solve the above problems, the inventors developed a long-short composite yarn having a new bundling structure, and discovered that in the case of such a composite yarn, the short fibers are tightly bound inside the long fibers and do not fall off. They also discovered that fabrics manufactured using this yarn have excellent processability and appearance, which led to the completion of the present invention.

[0007] In this regard, Korean Patent No. 10-2561648 discloses a spun, twisted, long and short composite yarn and a manufacturing method thereof. Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made to solve the above-mentioned problems of the prior art, and aims to provide a fabric containing long and short composite yarns, and an article manufactured using the fabric. [Means for solving the problem]

[0009] As a technical means for achieving the above-mentioned technical object, one aspect of the present invention is to The present invention provides a fabric including a long and short composite yarn, the long and short composite yarn including: a staple fiber portion composed of a plurality of adjacent staple fibers; and a long fiber portion composed of a plurality of long fibers twisted around the outer periphery of the staple fiber portion.

[0010] The short fibers may comprise a material selected from the group consisting of vegetable fibers, animal fibers, mineral fibers, recycled fibers thereof, and combinations thereof.

[0011] The plant fibers include materials selected from the group consisting of cotton fibers, cellulose fibers, hemp fibers, pineapple fibers, coffee bean fibers, banana fibers, ramie fibers, corn silk fibers, bamboo fibers, and combinations thereof; the animal fibers include materials selected from the group consisting of leather fibers, wool fibers, cashmere, camel hair fibers, mohair fibers, alpaca fibers, silk fibers, and combinations thereof; and the mineral fibers may be mica fibers or glass fibers.

[0012] The long fibers may contain a material selected from the group consisting of polyester fibers, polyamide fibers, polyurethane fibers, polyurea fibers, polyacrylic fibers, polyvinyl alcohol fibers, polyvinyl chloride fibers, polyvinylidene chloride fibers, polypropylene fibers, polyethylene fibers, polystyrene fibers, polyfluoroethylene fibers, biodegradable fibers, and combinations thereof.

[0013] The content of the short fibers may be 20 to 50 parts by weight based on 100 parts by weight of the long and short composite yarn.

[0014] The long and short composite yarn may have a uniformity U% of less than 2.

[0015] Another aspect of the present invention is An article manufactured using the fabric is provided.

[0016] The article may include automobile interior materials, footwear, furniture, decorative items, bags, clothing, mobile phone covers, electronic product covers, or car seats. [Effects of the Invention]

[0017] Although the long and short composite yarn according to the present invention contains short fibers, the short fibers are tightly bound inside the long fibers, and therefore it can be used as a composite yarn.

[0018] In addition, since the composite yarn has short fibers inserted inside the long fibers, the short fibers can be prevented from falling out and the composite yarn can have excellent uniformity.

[0019] In addition, the composite yarn may be manufactured with various types of staple fibers, thereby enabling the production of composite yarns with various feel and effects.

[0020] Finally, the composite yarn may have excellent tensile strength and elongation despite containing short fibers, and therefore may have excellent processability and appearance when applied to fabrics. It may also be widely used as a raw material for automotive interior materials, footwear components, or fabrics that are laminated and processed, such as the back surface of coated fabrics and intermediate materials for nonwoven fabrics. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a conceptual diagram showing a long-short composite yarn according to an embodiment of the present invention. [Figure 2] 1 is a weave design table for a fabric according to an embodiment of the present invention. [Figure 3] 1 is a photograph showing the appearance of a fabric manufactured according to an embodiment of the present invention. [Figure 4] 1 is a photograph showing the appearance of a fabric manufactured according to an embodiment of the present invention. [Figure 5] 1 is a photograph showing the appearance of a fabric manufactured according to an embodiment of the present invention. [Figure 6] 1 is a photograph showing the appearance of a fabric manufactured according to an embodiment of the present invention. [Figure 7] 1 is a photograph showing the appearance of a fabric manufactured according to an embodiment of the present invention. [Figure 8] 1 is a photograph showing the appearance of a woven fabric produced according to a comparative example of the present invention. [Figure 9] 1 is a photograph showing the appearance of a woven fabric produced according to a comparative example of the present invention. [Figure 10] 1 is a photograph showing the appearance of a knitted fabric manufactured according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] Although the present invention may be embodied in many different forms, it is not intended to be limited to the embodiments set forth herein, and the present invention is not limited to the embodiments set forth herein. [Example]

[0023] Example 1. Manufacture of fabric using long and short composite yarn

[0024] 1. Manufacturing of long and short composite yarn

[0025] (1) Weft yarn manufacturing

[0026] To manufacture the long and short composite yarn for weft according to the present invention, recycled polyethylene terephthalate (PET) with a fineness of 240 denier (D) was used as the long fiber, and leather fiber with an average length of 1 mm was used as the short fiber.

[0027] First, the leather fibers were sprayed onto the long fibers to bond them together. More specifically, the leather fibers were sprayed through a short fiber sprayer and then supplied to a 1,000 rpm cylinder at a feed rate of 0.1 g / min / weight through a 30 rpm gear pump. At this time, air was supplied to the surface of the cylinder through a first air knife to remove the solidified leather fibers adhering to the cylinder wire and to uniformly distribute the leather fibers among the long fibers. At this time, the air pressure of the first air knife was 1.5 kgf / cm. 2 It was.

[0028] Then, the filaments with dispersed leather fibers were passed through a second air knife to remove the clumped leather fibers adhering to the surface of the filaments and to uniformly bond them together. The second air knives were designed to be located above and below the filaments with dispersed leather fibers, and the air pressure was 1.5 kgf / cm. 2 It was.

[0029] Next, the long and short composite yarn was twisted by passing each fiber through a winder, and then wound up to obtain a long and short composite yarn. At this time, the winding speed was 15 m / min, the TPM (Twist per meter) was 600, and the weight ratio of leather fiber contained in the long and short composite yarn was 20 wt%.

[0030] (2) Warp manufacturing

[0031] In order to manufacture the long and short composite warp yarn according to the present invention, the same method as in (1) above was used to manufacture the long and short composite warp yarn, except that recycled polyethylene terephthalate (PET) having a fineness of 420 denier (D) was used as the long fiber, and the weight ratio of leather fiber contained in the long and short composite yarn was changed to 30 wt%.

[0032] The fineness of the long and short composite warp yarn produced at this time was 600 denier (D), and the number of warp threads was 8,200.

[0033] 2. Textile manufacturing

[0034] Using the weft and warp yarns produced in (1) and (2), respectively, a fabric was produced in the Oxford weave shown in Figure 2. At this time, the width of the fabric was 70 inches.

[0035] Example 2. Manufacture of fabric using long and short composite yarn

[0036] In Example 1 (1), recycled polyethylene terephthalate (PET) with a fineness of 210 denier (D) was used as the long fiber, leather fiber was supplied at a rate of 0.15 g / min / spindle through a gear pump at 45 rpm, and the weight ratio of leather fiber contained in the long and short composite yarn was changed to 30 wt%. A woven fabric was manufactured using the same method.

[0037] Example 3. Manufacture of fabric using long and short composite yarn

[0038] In Example 1(1), recycled polyethylene terephthalate (PET) with a fineness of 420 denier (D) was used as the long fiber, and leather fiber was supplied to a 2,000 rpm cylinder at a feed rate of 0.3 g / min / spindle through a 90 rpm gear pump. A woven fabric was manufactured using the same method, except that the weight ratio of leather fiber contained in the long and short composite yarn was changed to 30 wt%.

[0039] Example 4. Manufacture of fabric using long and short composite yarn

[0040] In Example 1(1), recycled polyethylene terephthalate (PET) with a fineness of 500 denier (D) was used as the long fiber, and leather fiber was supplied to a cylinder at a speed of 2,500 rpm at a feed rate of 0.83 g / min / spindle through a gear pump at 250 rpm, the TPM (Twist per meter) was set to 500, and the weight ratio of leather fiber contained in the long and short composite yarn was changed to 50 wt%. A woven fabric was manufactured using the same method.

[0041] Example 5. Production of fabric using long and short composite yarn

[0042] In Example 1(1), recycled polyethylene terephthalate (PET) with a fineness of 750 denier (D) was used as the long fiber, and leather fiber was supplied to a cylinder at a speed of 2,500 rpm at a rate of 2.5 g / min / spindle through a gear pump at a speed of 375 rpm, the TPM (Twist per meter) was set to 400, and the weight ratio of leather fiber contained in the long and short composite yarn was changed to 50 wt%. A woven fabric was manufactured using the same method.

[0043] Example 6. Production of knitted fabric using long and short composite yarn

[0044] A knitted fabric was produced using the long and short composite yarn produced in (1) of Example 1. More specifically, 96 long and short composite yarns were used and circular knitted using a jacquard knitting machine, which is a knitting machine, under the conditions of a width of 30 inches, a gauge of 16, and a feed speed of 48 m / min to produce a knitted fabric.

[0045] Table 1 below summarizes the conditions for producing the long and short composite yarns for wefts according to Examples 1 to 5 and the long and short composite yarn according to Example 6, as well as the processability of weaving fabrics and circular knitting fabrics.

[0046] [Table 1]

[0047] *The amount of fiber added when manufacturing one composite yarn is 12 times the amount of long and short fibers added when using 12 spindles.

[0048] As shown in Table 1, when woven and knitted fabrics were produced using the long and short composite yarns produced according to the examples of the present invention, both had excellent processability and no short fiber shedding occurred.

[0049] Comparative Example 1. Manufacture of fabric using long and short composite yarn

[0050] In Example 1(1), recycled polyethylene terephthalate (PET) with a fineness of 120 denier (D) was used as the long fiber, and leather fiber was supplied to a 2,000 rpm cylinder at a feed rate of 0.2 g / min / spindle through a 60 rpm gear pump, the TPM (Twist per meter) was set to 400, and the weight ratio of leather fiber contained in the long and short composite yarn was changed to 60 wt%. A woven fabric was manufactured using the same method.

[0051] Comparative Example 2. Manufacture of fabric using long and short composite yarn

[0052] In Example 1(1), recycled polyethylene terephthalate (PET) with a fineness of 240 denier (D) was used as the long fiber, and leather fiber was supplied to a 2,000 rpm cylinder at a feed rate of 0.4 g / min / spindle through a gear pump at 120 rpm, the TPM (Twist per meter) was set to 400, and the weight ratio of leather fiber contained in the long and short composite yarn was changed to 60 wt%. A woven fabric was manufactured using the same method.

[0053] Table 2 below summarizes the conditions for producing the long and short composite yarns for weft according to Comparative Examples 1 and 2 and the processability of weaving fabrics.

[0054] [Table 2]

[0055] *The amount of fiber added when manufacturing one composite yarn is 12 times the amount of long and short fibers added when using 12 spindles.

[0056] Experimental example 1: Confirmation of uniformity of long and short composite yarns

[0057] The uniformity (U%) of the long and short composite yarns for weft produced in Examples 1 to 5 and Comparative Examples 1 and 2 was measured, and the results are shown in Table 3 below. The uniformity (U%) was measured using a uniformity measuring machine (yarn speed: 100 m / min, measurement range: 25%, measurement time: 3 min) manufactured by Keisokki Co., Ltd., Japan. Meanwhile, the uniformity (U%) shown in Table 3 below was judged as good when it was 1.2 or less, and as poor when it was 2.0 or more.

[0058] [Table 3]

[0059] As shown in Table 3, it was confirmed that the long and short composite yarns for wefts manufactured in Examples 1 to 5 all had excellent uniformity and no short fibers were dropped off.

[0060] On the other hand, it was confirmed that the weft long and short composite yarns produced in Comparative Examples 1 and 2 had poor uniformity and that short fibers were removed, which was analyzed to be due to the high content of short fibers contained in the long and short composite yarns.

[0061] Experimental Example 2: Confirmation of the physical properties of long and short composite yarns

[0062] The properties of the long and short composite yarns for wefts prepared in Examples 1 to 5 and Comparative Examples 1 and 2 were measured, and the results are shown in Table 4 below.

[0063] [Table 4]

[0064] As shown in Table 4, it was confirmed that all of the long and short composite yarns for weft prepared according to the examples of the present invention had excellent tensile strength and tensile elongation, while it was confirmed that the long and short composite yarns for weft prepared according to the comparative examples had reduced tensile strength.

[0065] Experimental Example 3: Checking the appearance of woven and knitted fabrics

[0066] Photographs of the fabrics produced in Examples 1 to 5 are shown in Figures 3 to 7, respectively. As shown in Figures 3 to 7, it was confirmed that the fabrics produced in the examples of the present invention were neatly produced without exposed short fibers.

[0067] Meanwhile, photographs of the fabrics produced in Comparative Examples 1 and 2 are shown in Figures 8 and 9, respectively. As shown in Figures 8 and 9, it was confirmed that short fibers were exposed in the fabrics produced in the Comparative Examples of the present invention.

[0068] Also, a photograph of the knitted fabric produced in Example 6 is shown in Figure 10. As shown in Figure 10, it was confirmed that the knitted fabric produced in the example of the present invention had an excellent appearance without exposed short fibers.

[0069] The present invention may, however, be embodied in various different forms and should not be construed as limited to the embodiments set forth herein, but rather as defined by the claims that follow.

[0070] Furthermore, the terms used in the present invention are merely for describing specific embodiments and are not intended to limit the present invention. A singular expression includes a plural expression unless the context clearly indicates otherwise. Throughout the specification of the present invention, "comprising" one element does not mean excluding other elements, but means that other elements may be further included, unless otherwise specified.

[0071] In the present invention, the long-short composite yarn may be referred to as a long-short composite yarn because it includes both long long fibers and short short short fibers. In this case, the short fibers may be short fibers having a length of 150 mm or less (preferably 60 mm or less, more preferably 0.01 mm to 10 mm, and even more preferably 1 mm to 5 mm), or may include a plurality of such short fibers. Furthermore, the long fibers may refer to fibers having a length of more than 150 mm, i.e., fibers longer than the short fibers.

[0072] The present invention provides

[0073] The present invention provides a fabric comprising a long and short composite yarn, the long and short composite yarn comprising: a staple fiber section composed of a plurality of adjacent staple fibers; and a long fiber section composed of a plurality of long fibers twisted around the outer periphery of the staple fiber section.

[0074] The long and short composite yarn and fabric according to the present invention will be described in detail below with reference to FIG.

[0075] In one embodiment of the present application, the fabric may be a woven fabric or a knitted fabric, and in the case of a woven fabric, at least one of the weft and warp yarns may include the long and short composite yarn. The knitted fabric may be a circular knitted fabric or a warp knitted fabric, and according to one embodiment of the present invention, it may be a circular knitted fabric. Since the fabric is manufactured using the long and short composite yarn according to the present invention, it may have excellent processability and a neat appearance because the short fibers are tightly bound inside the long fibers and do not fall off.

[0076] In an embodiment of the present application, the long and short composite yarn may include a staple fiber portion composed of a plurality of staple fibers adjacent to each other. That is, the plurality of staple fibers may be adjacent to each other and formed in a solid form, which may be collectively referred to as a staple fiber portion.

[0077] In one embodiment of the present application, the staple fibers may be produced using fibers or may be obtained from waste fibers. The staple fibers may be short fibers, preferably including a plurality of such staple fibers. The length of the fibers may be 150 mm or less, preferably 60 mm or less, and more preferably 0.01 mm to less than 10 mm. In one embodiment of the present invention, the length of the staple fibers may be approximately 1 mm. If the length of the staple fibers is 10 mm or more, the uniformity of the resulting long-short composite yarn may be reduced, resulting in problems such as the staple fibers falling off.

[0078] In an embodiment of the present application, the short fibers may be selected from the group consisting of plant fibers, animal fibers, mineral fibers, and combinations thereof.

[0079] In one embodiment of the present application, the plant fiber may be extracted or produced from the leaves, stems, skins, or seeds of plants, and may be selected from the group consisting of cotton fiber, cellulose fiber, hemp fiber, pineapple fiber, coffee bean fiber, banana fiber, ramie fiber, corn silk fiber, bamboo fiber, and combinations thereof. Meanwhile, when the plant fiber is included as the short fiber, it can improve the naturalness and absorbency of the long and short composite yarn and have the effect of being environmentally friendly.

[0080] In addition, the plant fibers may be short fibers that are difficult to apply to ring spinning due to their short length. For example, the plant fibers may be produced by drying wood flour made by grinding waste wood, coffee grounds, tea grounds, etc., and then treating them with preservatives.

[0081] In one embodiment of the present application, the animal fiber may be a fiber obtained or produced from animal wool, for example, leather fiber, wool fiber, cashmere, camel hair fiber, mohair fiber, alpaca fiber, silk fiber, and combinations thereof. Meanwhile, when the short fiber includes an animal fiber, it may have a soft feel, a natural aesthetic, and heat retention effects. Also, the leather fiber may refer to cowhide fiber.

[0082] In one embodiment of the present application, the mineral fiber may be a natural mineral or a fiber extracted from a mineral, for example, a mica fiber or a glass fiber. Meanwhile, when the short fiber includes a mineral fiber, it may have fire resistance, corrosion resistance, and heat and noise insulation effects.

[0083] The staple fibers may be recycled fibers, specifically, fibers obtained by recycling staple fibers selected from the group consisting of plant fibers, animal fibers, mineral fibers, and combinations thereof. That is, the staple fibers may be fibers recycled from discarded fabrics or clothing. For example, when short cotton staple fibers collected by re-carding of underwear are used, the soft touch, absorbency, and breathability of cotton can be achieved.

[0084] In one embodiment of the present application, the long and short composite yarn may include a long fiber portion composed of a plurality of long fibers twisted around the outer periphery of the short fiber portion. That is, the plurality of long fibers are twisted in a certain direction and formed along the outer periphery of the short fiber portion, which may be collectively referred to as the long fiber portion. Therefore, since the short fiber portion is inserted into the long fiber portion, shedding of the short fibers may be completely prevented. Meanwhile, since the short fibers are short in length, twisting may not occur even when twisting is performed during the manufacturing process.

[0085] In an embodiment of the present application, the long fibers may be polymer fibers, and long long fibers may be used.

[0086] In one embodiment of the present application, the long fiber may be in the form of a filament yarn, a spun yarn, a DTY (Draw Textured Yarn) yarn, or an ATY (Air Textured Yarn) yarn.

[0087] In one embodiment of the present application, the long fibers may include fibers selected from the group consisting of polyester fibers, polyamide fibers, polyurethane fibers, polyurea fibers, polyacrylic fibers, polyvinyl alcohol fibers, polyvinyl chloride fibers, polyvinylidene chloride fibers, polypropylene fibers, polyethylene fibers, polystyrene fibers, polyfluoroethylene fibers, biodegradable fibers, and combinations thereof. Preferably, the long fibers may include fibers selected from the group consisting of nylon, vinylon, acrylic, polyvinyl alcohol (PVA), polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), polybutylene terephthalate (PBT), recycled polyethylene terephthalate (PET), polylactic acid (PLA), Tencel, chitosan, spider silk fibers, and combinations thereof. On the other hand, preferably, the long fibers may comprise recycled polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT) or polylactic acid (PLA).

[0088] According to one embodiment of the present application, the thickness of the long fiber in the long and short composite yarn may be 60 denier (D) or more, preferably 100 to 2,000 denier (D), more preferably 100 to 1,000 denier (D), and even more preferably 200 to 800 denier (D). If the thickness of the long fiber is less than 100 denier (D), the thickness as a standard fiber is too thin, and the composite yarn containing the long fiber may not have sufficient physical properties, making it difficult to apply to fabrics. On the other hand, if the thickness of the long fiber is more than 2,000 denier (D), the thickness as a standard fiber is too thick, and there may be a problem that the unique texture expressed by the inclusion of short fibers is not well expressed.

[0089] According to one embodiment of the present application, the content of the staple fiber in the long and short composite yarn may be 10 to 80 parts by weight, preferably 20 to 60 parts by weight, per 100 parts by weight of the composite yarn, and in one embodiment of the present invention, it may be 20 to 50 parts by weight. If the content of the staple fiber is less than 10 parts by weight per 100 parts by weight of the composite yarn, the content of the staple fiber is too low, so the various feel and effects achieved by including various types of staple fibers may not be fully realized. On the other hand, if the content of the staple fiber is 60 parts by weight or more per 100 parts by weight of the composite yarn, the content of the long fiber is relatively too low, so problems such as deterioration in the physical properties of the composite yarn, deterioration in uniformity, and shedding of the staple fibers may occur.

[0090] In one embodiment, the long and short composite yarn may be formed such that the long fibers cover the outside of the short fibers, completely preventing the short fibers from falling out. Therefore, when fabric is manufactured using the long and short composite yarn, the short fibers do not fall out, and the fabric may have a very clean appearance. Furthermore, the long and short composite yarn may be capable of removing the short fibers through a re-separation process after use.

[0091] In one embodiment of the present application, the long and short composite yarn may have a uniformity U% of less than 2, preferably 1.2 or less, a tensile strength of 1.5 g / D to 3.5 g / D, and an elongation of 25% to 50%.

[0092] In one embodiment of the present application, the long and short composite yarn may be usable for manufacturing suede fabric, moquette fabric, knit fabric, or the like.

[0093] In one embodiment, an article may be manufactured using a fabric including the long and short composite yarn. The article may include automobile interior materials, footwear components such as sneakers, furniture, decorative items, accessories such as bags, clothing, mobile phone covers, electronic product covers, or car seats. Meanwhile, the automobile interior materials may refer to headliners, door trims, floor carpets, etc.

[0094] In one embodiment of the present application, the article may have an artificial leather surface formed by coating one side of a woven or knitted fabric woven with the long and short composite yarn. The coating may be a PU coating, PVC coating, RP coating, pigment coating, spray coating, water-based coating, or oil-based coating. The article may be a fabric manufactured by applying leather fibers to the woven or knitted fabric and entangling the fabric using a water jet or needle punch, and may have a soft appearance due to brushing and buffing processes.

[0095] Hereinafter, the method for manufacturing a long and short composite yarn according to the present invention will be described in detail.

[0096] First, in one embodiment of the present application, the method for manufacturing the long and short composite yarn may include the step of injecting short fibers into long fibers.

[0097] In one embodiment, the staple fibers may be injected through a staple fiber injection device. The staple fiber injection device may include a gear pump for supplying the staple fibers at a constant rate and a cylinder for uniformly dispersing and injecting the staple fibers onto the surface of the long fibers. The supply rate of the staple fibers through the gear pump may be 0.1 g / min to 200 g / min / spindle, and in one embodiment of the present invention, about 0.1 g / min to 2.5 g / min / spindle. If the supply rate of the staple fibers is less than 0.1 g / min / spindle, the content of the staple fibers may be too low, resulting in poor composite yarn formation. However, if the supply rate of the staple fibers is more than 2.5 g / min, the physical properties of the resulting long and short composite yarn may be weak. The rotational rpm of the gear pump may be 500 rpm or less, and the rotational rpm of the cylinder may be 3,000 rpm or less.

[0098] In one embodiment of the present application, the short fiber injection device may further include a first air knife that supplies air to the cylinder. That is, the short fiber injection device may supply air to the cylinder to remove solidified short fibers adhering to the cylinder wire and uniformly distribute the short fibers among the long fibers. In this case, the angle of the first air knife may be adjusted as needed, and the injected air pressure may be 3.0 kgf / cm. 2 It can be the following:

[0099] In an embodiment of the present application, the method for manufacturing the long and short composite yarn may include the step of injecting air onto the long fibers onto which the short fibers have been injected.

[0100] In one embodiment of the present application, the air injection may be performed through a second air knife. The second air knives may be positioned above and below the long fibers onto which the short fibers are injected, and may inject air. In this case, the angle of the second air knife may be adjusted as needed, and the injected air pressure may be 3.0 kgf / cm. 2 It can be the following:

[0101] In one embodiment of the present application, air is sprayed onto the long fibers onto which the short fibers have been sprayed, thereby removing any clumped short fibers adhering to the surface of the long fibers, and the short fibers can be bonded more uniformly.

[0102] Next, in an embodiment of the present application, the method for manufacturing the long and short composite yarn may include twisting the long fibers onto which the short fibers have been injected.

[0103] In one embodiment of the present application, the staple fibers can be drawn into the long fibers by twisting the long fibers into which the staple fibers have been injected. Therefore, as shown in FIG. 1, the staple fibers can be tightly bound within the long fibers without falling off. More specifically, the twisting can be performed using a winder, i.e., twisting and winding. That is, through this, the staple fibers can be more tightly bound within the long fibers. Meanwhile, the twisting and winding speed can be 60 m / min or less, preferably 10 m / min to 60 m / min, and more preferably 15 m / min to 50 m / min. If the speed is less than 10 m / min, economic efficiency may decrease, while if the speed is more than 60 m / min, the TPM (twist per meter) of the composite yarn formed is low, which may cause the staple fibers to fall off. Furthermore, the TPM level can be 800 or less, preferably 100 to 800, and more preferably 300 to 800. If the TPM level is 300 or less, short fibers may fall off from the formed composite yarn, while if the TPM level is more than 800, excessive slowing of the production speed and excessive twisting may occur. On the other hand, when twisting is performed, the short fibers may not be twisted because of their short length, and only the long fibers may be twisted in a certain direction.

[0104] In one embodiment of the present application, the long and short composite yarn may be produced under constant temperature and humidity conditions, more specifically, under room temperature and humidity conditions. That is, the long and short composite yarn may be produced at a constant temperature of about 20°C to 30°C and a constant relative humidity of 50% to 60%. If the long and short composite yarn is produced outside the above temperature and humidity ranges, static electricity may be generated when the short fibers are supplied.

[0105] Although the present invention has been described in detail above with reference to the drawings and preferred embodiments, the scope of the technical concept of the present invention is not limited to these drawings and embodiments. Therefore, various modifications or equivalent embodiments may exist within the scope of the technical concept of the present invention. Therefore, the scope of the technical concept of the present invention should be interpreted by the claims, and any technical concept equivalent to or within the scope of the claims should be interpreted as belonging to the scope of the present invention. [Industrial Applicability]

[0106] Although the long and short composite yarn according to the present invention contains short fibers, the short fibers are tightly bound inside the long fibers, and therefore it can be used as a composite yarn.

[0107] In addition, since the composite yarn has short fibers inserted inside the long fibers, the short fibers can be prevented from falling out and the composite yarn can have excellent uniformity.

[0108] In addition, the composite yarn may be manufactured with various types of staple fibers, thereby enabling the production of composite yarns with various feel and effects.

[0109] Finally, the composite yarn may have excellent tensile strength and elongation despite containing short fibers, and therefore may have excellent processability and appearance when applied to fabrics. Therefore, the composite yarn may be widely used as a raw material for automobile interior materials, footwear components, or fabrics to be processed by lamination, for example, the back surface of coated fabrics, intermediate materials for nonwoven fabrics, etc.

Claims

1. In fabrics containing long and short composite yarns, The long and short composite yarn is A short fiber portion composed of a plurality of short fibers adjacent to each other; and a long fiber portion composed of a plurality of long fibers twisted and formed on the outer peripheral surface of the short fiber portion; The fabric is one that includes.

2. 2. The fabric of claim 1, wherein the staple fibers comprise a material selected from the group consisting of vegetable fibers, animal fibers, mineral fibers, recycled fibers thereof, and combinations thereof.

3. the plant fiber comprises a material selected from the group consisting of cotton fiber, cellulose fiber, hemp fiber, pineapple fiber, coffee bean fiber, banana fiber, ramie fiber, corn silk fiber, bamboo fiber, and combinations thereof; the animal fibers include materials selected from the group consisting of leather fibers, wool fibers, cashmere, camel hair fibers, mohair fibers, alpaca fibers, silk fibers, and combinations thereof; 3. The fabric of claim 2, wherein the mineral fibers are mica fibers or glass fibers.

4. 2. The fabric according to claim 1, wherein the long fibers comprise a material selected from the group consisting of polyester fibers, polyamide fibers, polyurethane fibers, polyurea fibers, polyacrylic fibers, polyvinyl alcohol fibers, polyvinyl chloride fibers, polyvinylidene chloride fibers, polypropylene fibers, polyethylene fibers, polystyrene fibers, polyfluoroethylene fibers, biodegradable fibers, and combinations thereof.

5. The fabric according to claim 1, wherein the content of the short fibers is 20 to 50 parts by weight based on 100 parts by weight of the long-short composite yarn.

6. The fabric according to claim 1, wherein the long and short composite yarn has an evenness U% of less than 2.

7. An article made using the fabric of claim 1.

8. 8. The article of claim 7, wherein the article comprises an automobile interior material, footwear, furniture, decoration, a bag, clothing, a mobile phone cover, an electronic product cover, or a car seat.

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