Twisted yarn and fabric

Abstract

To provide a twisted yarn having high stability of imparted functions.SOLUTION: The twisted yarn 1 includes a thin and long core material 20, a slit 10 in which a coating layer is formed on at least one surface of base paper, and a thin and long pressing yarn 30 wound around the core material 20 and the slit 10.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a yarn, more particularly to a paper-based yarn, and also to a fabric made from the yarn. [Background technology]

[0002] Twisted yarns made of paper (hereinafter sometimes referred to as "paper yarns") are known. Such paper yarns are generally formed by twisting together long, thin strips of paper.

[0003] There is a demand for imparting various functions to paper yarn. In Patent Document 1, in order to prevent thread breakage during weaving, which is one of the drawbacks of paper yarn, filaments made from thin Japanese paper made from Manila hemp are twisted and then passed through a tank containing molten wax.

[0004] That is, in Patent Document 1, a paper thread is immersed in molten wax to form a wax layer on the surface, and this wax layer prevents thread breakage. As such, when imparting a desired function to a thread, not limited to paper thread, it is widely known to impregnate the thread with a chemical solution or the like that exerts the function. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 11-172541 Summary of the Invention [Problem to be solved by the invention]

[0006] The layer formed on the surface of the paper yarn by impregnation may crack or peel off during subsequent transportation, bending, etc., depending on its physical properties. Furthermore, when imparting multiple functions using this method, the surface layer becomes thicker due to the sequential impregnation with multiple chemical solutions, which may make the layer more susceptible to peeling or reduce flexibility, making it harder to handle.

[0007] In view of the above circumstances, an object of the present invention is to provide a twisted yarn that has a highly stable imparted function. [Means for solving the problem]

[0008] A first aspect of the present invention is a twisted yarn formed using a slit in which a coating layer is formed on one side of a base paper.

[0009] A second aspect of the present invention is a woven fabric formed using the twisted yarn according to the first aspect. This woven fabric is formed using the twisted yarn according to the first embodiment as the weft and yarn containing modacrylic fiber containing vinyl chloride as the warp. [Effects of the Invention]

[0010] According to the present invention, a twisted yarn having highly stable imparted functions can be provided. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is a schematic diagram showing a slit used in a twisted yarn according to one embodiment of the present invention. [Figure 2] FIG. 10 is a schematic diagram showing another example of the slit. [Figure 3] FIG. 2 is a diagram showing the structure of the twisted yarn according to an example. DETAILED DESCRIPTION OF THE INVENTION

[0012] An embodiment of the present invention will be described with reference to FIGS. The twisted yarn according to this embodiment is formed by twisting together at least one core material, at least one paper slit, and at least one holding thread. Fig. 1 shows a schematic diagram of a slit 10. The slit 10 has a configuration in which a coating layer 12 is formed on one side of a base paper 11. Since the coating layer 12 according to this embodiment contains a flame retardant, the slit 10 exhibits flame retardancy based on the flame retardant.

[0013] The base paper 11 according to the present embodiment is not limited to ordinary paper made from plant-derived pulp, but may be any sheet-like structure formed by a wet papermaking method using a fibrous material. For example, a sheet-like structure formed by a wet papermaking method using a fibrous material made of synthetic resin can be used as the base paper 11 according to the present embodiment, and one formed by mixing synthetic resin and natural pulp can also be used. The natural pulp is not limited to virgin pulp, and may include recycled pulp. The thickness of the base paper 11 can be, for example, about 20 to 500 μm.

[0014] The coating layer 12 can be formed by various known coating methods such as die coating, or various known printing methods such as screen printing or gravure printing. As is clear from the above, the coating layer 12 does not need to completely cover one side of the base paper 11 with the material that makes up the coating layer. For example, the coating layer 12 may be formed in stripes on one side of the base paper 11, so that there is an area on one side where part of the base paper 11 is exposed. Alternatively, the coating layer may cover the entire base paper 11 from a macroscopic perspective, but the material that makes up the coating layer may be arranged in a large number of fine dots from a microscopic perspective. Such a coating layer formation mode makes it easy to adjust the degree of function that the coating layer exerts by changing the size and density of the dots. On the other hand, it goes without saying that the coating layer 12 may be formed so as to completely cover one side of the base paper 11 without any gaps. In any of the above embodiments, the thickness of the coating layer 12 can be, for example, about 2 to 100 μm.

[0015] The width of the slit 10 can be about 1 to 50 mm. If the width of the slit 10 is 15 mm or less, it becomes easy to form a twisted yarn using a plurality of slits 10.

[0016] The core material to be combined with the slit 10 is not particularly limited as long as it is long and thin, but is typically a thread containing fiber. When using fiber, natural fibers or synthetic fibers can be used. For either, either a single fiber or a fiber made by twisting together multiple strands can be used. A twisted yarn made by twisting multiple types of fiber can also be used. Examples of natural fibers include cotton, hemp, wool, silk, etc. Examples of synthetic fiber materials include polyethylene, polypropylene, polyester, nylon, acrylic, vinylon, polyolefin, para-aramid, meta-aramid, polyarylate, polybenzoxazole, and modacrylic fibers, which will be described later. Furthermore, recycled fibers such as rayon may be used as the core material. The thickness of the core material can be about 10 to 5500 decitex. In addition to fibers, other slits 10 or slits made of paper without a coating layer can also be used as the core material. The paper used as the core material can be the same as the base paper 11 described above, and the width of the slit can be the same as that of the slit 10.

[0017] The holding threads are wound around the core material and the slits and twisted together. The holding threads can be the same as those used for the core material and can be of approximately the same thickness.

[0018] In the twisted yarn according to this embodiment, there is no particular limitation on the method for twisting the core material, the slits 10, and the holding yarns together, and any appropriate known method can be used. For example, the covering yarn technique described in Japanese Patent No. 6930735 can be exemplified.

[0019] The twisted yarn according to the present embodiment configured as described above exhibits flame retardancy due to the coating layer 12 provided in the slit 10. Therefore, a fabric made using this exhibits sufficient flame retardancy despite containing a large amount of paper, and is therefore suitable for use in applications such as shades installed in homes.

[0020] In the twisted yarn produced according to this embodiment, the slits 10 are twisted together and twisted irregularly, so that the coating layer 12 is not only present on the surface of the twisted yarn but is also moderately distributed inside the yarn. This is a major difference from when a flame-retardant layer is formed by impregnation. Due to this difference in configuration, the twisted yarn according to this embodiment is less susceptible to the influence of the coating layer 12 disposed inside, even when the twisted yarn is bent or the outer surface is subjected to friction, and as a result, the function provided by the coating layer 12 can be exerted more stably. Furthermore, the holding threads also ensure that the core material and the slits are kept in close contact with each other.

[0021] In this embodiment, the function that can be imparted by the coating layer 12 is not limited to the flame retardancy described above. Other functions include water repellency, hydrophilicity, toughness (resistance to cut), chemical resistance, heat resistance, radio wave resistance, conductivity, light control, weather resistance, stain resistance, sound control, etc. In other words, as long as a material that exhibits the desired function is available, almost any function can be easily imparted to the twisted yarn by forming a coating layer 12 containing that material on the base paper 11. For example, paper containing a large amount of recycled pulp (for example, 30% by mass or more) generally has inferior physical properties compared to paper made only from virgin pulp, making it difficult to use as is as base paper 11, but by providing a coating layer 12 that exhibits the function of improving physical properties such as toughness, it becomes possible to use it as slit paper 10. This also makes it possible to make twisted yarns with a reduced environmental impact.

[0022] Furthermore, when the material of the base paper 11 is difficult to dye, such as aramid fiber, the coating layer 12 having the desired color (including fluorescent or luminous) can be provided to give the twisted yarn a desired appearance. In this case, the coating layer 12 gives the twisted yarn the function of "realizing an appearance that is difficult to achieve in view of the material of the base paper."

[0023] Two or more coat layers 12 may be provided in one slit. That is, as in slit 10A shown in Fig. 2, by forming a second coat layer 13 having a different composition from the coat layer 12 on the base paper 11, two types of functions can be imparted to the slit 10 and the twisted yarn formed using it, and it is also possible to add further coat layers. The second coating layer may be formed on the coating layer 12, or may be formed on the surface on which the coating layer 12 is not provided.

[0024] By forming two or more types of slits 10 with different coating layers 12, it is possible to impart multiple types of functions to the twisted yarn. In this case, if the colors of the coating layers in the slits used are different, the respective coating layers will be exposed to the outer surface in an irregular manner when the yarns are twisted together, making it possible to produce a twisted yarn with a wide variety of appearances that is difficult to achieve with ordinary twisted yarns. It is also possible to create a configuration that combines the desired function and desired color.

[0025] The twisted yarn according to this embodiment can be used to form woven or knitted fabrics. When a woven fabric is made using the twisted yarn according to this embodiment, the twisted yarn can be used for either the warp or the weft, or both. There are no particular restrictions on the weaving method, and various known methods such as plain weave, twill weave, and satin weave can be used. For example, by forming a fabric using the twisted yarn according to this embodiment as the weft and modacrylic fibers containing vinyl chloride, which have excellent flame retardancy, as the warp, it becomes possible to produce curtains, indoor blinds, etc. that are made of paper but have the flame retardancy specified by Japan's Fire Service Act. This modacrylic fiber has the advantage of being more slowly degraded by ultraviolet rays than aramid fibers, which also have excellent flame retardancy, and is therefore particularly suitable for fabrics to be used outdoors.

[0026] When producing the twisted yarn according to this embodiment, if the slit width is large, the slit may be inserted obliquely into the yarn path of the twisting machine, which reduces the contact area between the yarn path and the slit and prevents the slit from breaking due to frictional resistance. The slits of this embodiment, which have a coating layer, are harder than paper without a coating layer, so torque is not easily transmitted during twisting, making it easy for uneven twisting to occur, but by doing as described above, the slits that pass through the yarn path are not positioned parallel to the core material, and as a result, the twisted yarn 1 has a structure in which the slits 10 are wound spirally around the core material 20 without much twist, and the pressure thread 30 is wound on top of them, as shown in Figure 3. The core material 20 plays a role in holding the slits 10 so that they do not slip away from the pressure thread 30 when the pressure thread 30 is wound around the slits 10. In this structure, the slits 10 behave like the curled cord of a fixed telephone, making the twisted yarn 1 less likely to break when subjected to longitudinal pulling force than in a structure in which the core material and slits are arranged in a roughly parallel arrangement and the hold-down thread is wound around them. Furthermore, when the hold-down thread is wound around a slit parallel to the core material, the slit that is clamped by the hold-down thread tends to become rod-shaped and hard, but in the spiral slit, the slit does not become rod-shaped and is held in place to an appropriate extent so that it does not separate from the core material, making the twisted yarn 1 soft overall and allowing it to be woven or knitted well despite having a coating layer. There is no particular limitation on the degree of winding of the slit, and it can be, for example, about 2 to 2000 turns per 1 m of twisted yarn.

[0027] The twisted yarn according to this embodiment will be further described using examples. The technical scope of the present invention is not limited solely by the specific content of the examples.

[0028] Example 1 (Preparing the slit) 40 parts virgin pulp (N material) 20 parts recycled pulp Manila hemp pulp 40 parts The mixture was made into paper using a cylinder paper machine, and the paper was 30 g / m 2 I got the paper. A water-based phosphorus-based flame retardant was printed on both sides of the paper using a gravure printing machine to form a flame-retardant coating layer 5 μm thick. This paper was cut into 4 mm widths using a round blade slitter to form slits according to Example 1. (Twisted yarn processing) Core material: 10 count cotton 3 x 4mm slits 1 strand of cotton (10 count) The yarn was subjected to single covering using a covering twisting machine (Try Twister manufactured by Nippon Boshoku Machinery Co., Ltd.) to produce the twisted yarn according to Example 1. (Fabric production) The twisted yarn according to Example 1 was used as the weft yarn, and a twisted yarn made by twisting modacrylic fiber containing vinyl chloride and polyester fiber was used as the warp yarn. By using a loom to twist the warp yarn while passing the weft yarn through, a woven fabric with an opening ratio of approximately 30% was produced.

[0029] Example 2 (Preparing the slit) Virgin pulp (N material) 49 parts Recycled pulp 51 parts The mixture was made into paper using a cylinder paper machine, and the paper was 18g / m 2 I got the paper. A flame-retardant coating layer similar to that in Example 1 was formed on this paper. The paper was cut into 1.5 mm widths using a round blade slitter to form slits according to Example 2. (Twisted yarn processing) Core: 1 strand of polyester filament yarn, 167 decitex (150 denier) 1.5mm slit x 1 - Holding thread: 1 strand of polyester filament thread of the same material as the core material The yarn was subjected to single covering using the same covering twisting machine as in Example 1 to produce a twisted yarn according to Example 2. (Fabric production) A knitted fabric could be produced without any problems by knitting the twisted yarn according to Example 2 on a whole garment flat knitting machine (15 gauge) manufactured by Shima Seiki Mfg. Co., Ltd. This twisted yarn could also be knitted using a warp knitting machine.

[0030] Example 3 The 4 mm slit according to Example 1 was used as the slit. Core material: Modacrylic fiber (20 count) 1 strand 3 x 4mm slits - 1 strand of modacrylic fiber (20 count) The yarn was subjected to single covering using the same covering twisting machine as in Example 1 to produce a twisted yarn according to Example 3.

[0031] Example 4 The 4 mm slit according to Example 1 was used as the slit. Core material: Modacrylic fiber (20 count) 1 strand 3 x 4mm slits Holding thread: 1 polyester filament thread similar to that in Example 2 The yarn was subjected to single covering using the same covering twisting machine as in Example 1 to produce a twisted yarn according to Example 4.

[0032] Example 5 The 4 mm slit according to Example 1 was used as the slit. Core material: Modacrylic fiber (20 count) 2 strands 3 x 4mm slits - 1st layer of modacrylic fiber (20 count) - 1 strand of modacrylic fiber (20 count) The yarn was double covered using the same covering twisting machine as in Example 1 to produce a twisted yarn according to Example 5.

[0033] Example 6 (Preparing the slit) Only recycled pulp is made into paper using a cylinder paper machine, and the paper weight is 18g / m 2 I got the paper. A flame-retardant coating layer similar to that in Example 1 was formed on this paper. This paper was cut into 1.5 mm widths using a round blade slitter to form slits according to Example 6. (Twisted yarn processing) Core: 1 strand of polyester filament yarn, 167 decitex (150 denier) 1.5mm slit x 1 - Holding thread: 1 strand of polyester filament thread of the same material as the core material The yarn was subjected to single covering using the same covering twisting machine as in Example 1 to produce a twisted yarn according to Example 6.

[0034] Example 7 Example 7 is an example in which a layer of a predetermined color is used as the functional layer to achieve a unique color. (Preparing the slit) 40 parts virgin pulp (N material) 20 parts recycled pulp Manila hemp pulp 40 parts The mixture was made into paper using a cylinder paper machine, and the paper was 30 g / m 2 I got the paper. Using a gravure printing machine, a yellow first color layer was formed over the entire surface of one side of this paper, and a red second color layer was formed over the entire surface of the other side, both using acrylic inks. This paper was cut into 4 mm widths using a round blade slitter to form slits according to Example 1. (Twisted yarn processing) Core material: 10 count cotton 3 x 4mm slits 1 strand of cotton (10 count) The yarn was subjected to single covering using the same covering twisting machine as in Example 1 to produce the twisted yarn of Example 7. (Fabric production) Using the twisted yarn of Example 7 as the weft and a twisted yarn made of polyvinyl chloride-containing modacrylic fiber and polyester fiber as the warp, a loom was used to twist the warp while passing the weft through, resulting in a woven fabric with an opening rate of approximately 30% and a mixture of yellow and red. The color of this fabric would be difficult to achieve by dyeing the yarn.

[0035] Example 8 Example 8 is an example in which a unique color is achieved by adding another functional layer to a functional layer of a predetermined color. (Preparing the slit) Both sides of the paper on which the first color layer and the second color layer according to Example 7 were provided were coated with an ethylene vinyl acetate adhesive at a rate of 20 g / m 2 The paper was coated and laminated with a translucent polyester nonwoven fabric to lighten the colors of the first and second color layers. This paper has a color-adjusting layer made of polyester nonwoven fabric, which is another functional layer, on the first and second color layers. This paper was cut into 4 mm widths using a round blade slitter to form slits according to Example 8. (Twisted yarn processing) Core material: 10 count cotton 3 x 4mm slits 1 strand of cotton (10 count) The yarn was subjected to single covering using the same covering twisting machine as in Example 1 to produce a twisted yarn according to Example 8. (Fabric production) Using the twisted yarn of Example 8 as the weft and a twisted yarn made of vinyl chloride-containing modacrylic fiber and polyester fiber as the warp, a loom was used to twist the warp while passing the weft through, resulting in a woven fabric with an opening rate of approximately 30% and a mixture of pale yellow and red. The color of this fabric could not be achieved by dyeing the yarn.

[0036] Example 9 (Preparing the slit) Virgin pulp (N material) 49 parts Recycled pulp 51 parts The mixture was made into paper using a cylinder paper machine, and the paper was 30 g / m 2 I got the paper. A flame-retardant coating layer similar to that in Example 1 was formed on this paper. This paper was cut into 4 mm widths using a round blade slitter to form slits according to Example 1. (Twisted yarn processing) Core: 1 strand of polyester filament yarn, 167 decitex (150 denier) 3 x 4mm slits - Holding thread: 1 strand of polyester filament thread of the same material as the core material The yarn was single covered using the same covering twisting machine as in Example 9, and the twisted yarn of Example 9 was produced without any problems. The tensile strength of the yarn according to Example 9 was measured in accordance with JIS P8113:2006 and was found to be 33.5N. For confirmation, an attempt was made to produce a woven fabric similar to that of Example 1 using the twisted yarn of Example 9, and it was confirmed that the fabric could be produced without any problems and was fully capable of withstanding weaving processing using a loom.

[0037] Although one embodiment of the present invention has been described above, the specific configuration is not limited to this embodiment, and modifications and combinations of the configuration within the scope that does not depart from the gist of the present invention are also included.

[0038] For example, there is no particular limit to the number of core materials, slits, and holding threads in the twisted yarn according to the present invention, and the twisted yarn may be formed by using one or more of these materials in plural. [Explanation of symbols]

[0039] 1. Twisted Yarn 10, 10A slit 11 Base paper 12 Coating Layer 13 Second coating layer 20 Core material 30 Holding thread

Claims

1. A thin core material and a slit having a coating layer formed on at least one surface of the base paper; a thin and long holding thread wound around the core material and the slit; Equipped with Twisted yarn.

2. The slit wraps around the core material. The twisted yarn of claim 1.

3. The coating layer contains a flame retardant. The twisted yarn of claim 1.

4. Further provided with a second coating layer having a different composition from the coating layer, The twisted yarn of claim 1.

5. The base paper contains 30% by mass or more of recycled pulp. The twisted yarn of claim 1.

6. The twisted yarn according to any one of claims 1 to 5 is used as a weft yarn, The warp yarn is made of modacrylic fiber containing vinyl chloride. fabric.

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