Textile manufacturing method

Abstract

To provide a method capable of rationally obtaining a fiber product in which color density is changed.SOLUTION: The manufacturing method comprises following steps: a step to prepare a first multifilament yarn formed by converging a plurality of core-sheath type conjugate filaments consisting of a black core component composed of polyethylene terephthalate colored in black and a sheath component composed of colorless translucent copolyester; a step to prepare a second multifilament yarn formed by converging a plurality of core-sheath type conjugate filaments consisting of a core component composed of colorless translucent polyethylene terephthalate and a sheath component composed of colorless translucent copolyester; a step to obtain a yarn by twisting the first multifilament yarn and the second multifilament yarn together, and a step to melt the copolyester by applying heat treatment to the yarn so as to be integrated.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for producing a textile product that can impart a desired shade of color. [Background technology]

[0002] Conventionally, when selling textile products such as threads, braids, woven fabrics, or knitted fabrics, it has been common to prepare several textile products with different shades of color desired by the consumer. However, in order to meet the consumer's request, it has been necessary to change the raw materials or compounding amounts of dyes, pigments, etc., and start over from the manufacturing of the fiber itself.

[0003] For example, Patent Document 1 describes a method for producing a multifilament yarn with different color shading by coloring the core and sheath components of a core-sheath composite fiber with different colors and changing the mass ratio of the core and sheath components. However, this method also has the disadvantage that the production of the core-sheath composite fiber itself must be started over.

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-254229 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a method for rationally obtaining textile products with varying color shades. [Means for solving the problem]

[0006] The present invention solves the above problem by using a multifilament yarn having a predetermined color that is prepared in advance and a transparent or translucent multifilament yarn that is prepared in advance. That is, the present invention relates to a method for producing a textile product, comprising the steps of: preparing a first multifilament yarn in which a plurality of sheath-core first conjugated filaments are bundled together; the first sheath first conjugated filaments each comprising a first core component made of a colored high-melting-point polymer component and a first sheath component made of a colorless, transparent or colorless, translucent low-melting-point polymer component; preparing a second multifilament yarn in which a plurality of sheath-core second conjugated filaments each comprising a second core component made of a colorless, transparent or colorless, translucent high-melting-point polymer component and a second sheath component made of a colorless, transparent or colorless, translucent low-melting-point polymer component; twisting the first multifilament yarn and the second multifilament yarn together in a spiral to obtain a yarn; and subjecting the yarn to a heat treatment, wherein the heat treatment melts or softens the low-melting-point polymer component constituting the sheath-core first conjugated filaments and the sheath-core second conjugated filaments in the yarn, thereby integrating the sheath-core first conjugated filaments and the sheath-core second conjugated filaments.

[0007] In the present invention, a first multifilament yarn is first prepared. The first multifilament yarn is formed by bundling a plurality of sheath-core first composite filaments. The sheath-core type may be a concentric sheath-core type or an eccentric sheath-core type. The number of bundled filaments is arbitrary, for example, about 2 to 200. The bundled state of the plurality of filaments may be a state in which the sheath-core first composite filaments are simply drawn together, or may be a twisted state. The sheath-core first composite filament is formed by a first core component made of a high-melting point polymer component and a sheath component made of a low-melting point polymer component. The mass ratio of the first core component to the first sheath component is arbitrary, but a first core component:first sheath component ratio of 1 to 4:1 is preferable. The fineness of the sheath-core first composite filament is also arbitrary, for example, about 1 to 20 decitex. Examples of combinations of high-melting point polymer component / low-melting point polymer component include polyethylene terephthalate / copolymer polyester, polyethylene terephthalate / polyolefin, and nylon 6 / nylon 66. A pigment or dye is added to the high-melting point polymer component, and the high-melting point polymer component is colored in any color. Conventionally known pigments or dyes are used. The low-melting point polymer component is colorless, transparent, or colorless, translucent so that light can pass through. To make the low-melting point polymer component colorless, transparent, or colorless, translucent, it is sufficient to not add a pigment. Therefore, the first multifilament yarn is visually recognized as the color of the colored high-melting point polymer component.

[0008] Next, a second multifilament yarn is prepared. The second multifilament yarn has the same configuration as the first multifilament yarn, but differs in that it is colorless, transparent, or colorless translucent. That is, in the core-sheath second composite filament constituting the second multifilament yarn, the second core component is formed of a colorless, transparent, or colorless translucent high-melting-point polymer component, and the second sheath component is formed of a colorless, transparent, or colorless translucent low-melting-point polymer component. Note that the terms "colored" and "colored" as used herein also include achromatic colors such as white, gray, and black.

[0009] The prepared first multifilament yarn and second multifilament yarn are aligned and then twisted together to obtain a yarn. This twisting causes the sheath-core first composite filaments in the first multifilament yarn and the sheath-core second composite filaments in the second multifilament yarn to be helically twisted together. In this yarn, the first multifilament yarn has a color, and the second multifilament yarn is colorless, transparent, or colorless, translucent. Therefore, by changing the mass ratio of the first multifilament yarn to the second multifilament yarn, yarns with various shades can be obtained. At the yarn stage before heat treatment, the colorless, transparent, or colorless, translucent second multifilament yarn is mixed with the colored first multifilament yarn, preventing light from passing through and appearing white due to light reflection, giving the yarn a so-called mottled appearance.

[0010] Next, the yarn is subjected to a heat treatment. This heat treatment is a treatment for softening or melting only the low-melting-point polymer component in the first multifilament yarn and only the low-melting-point polymer component in the second multifilament yarn to integrate them. Therefore, the heating temperature is at or above the softening temperature or melting point of both low-melting-point polymer components and below the melting points of both high-melting-point polymer components. The heat treatment is preferably performed while the yarn is in a tensioned state. This is because keeping the yarn in a tensioned state makes it easier for both low-melting-point polymer components to flow and integrate. This heat treatment results in the first core component group and second core component group, which maintain their fiber form and are in a spiral shape, being present in a matrix consisting of both integrated low-melting-point polymer components. As a result, a colored first core component group and a colorless second core component group are mixed in a spiral shape in a colorless, transparent or colorless, translucent matrix. Therefore, since the heat-treated yarn does not have an independent second multifilament yarn, under normal visual conditions it does not appear mottled, but appears to be a diluted color of the first core component group.

[0011] The heat treatment of the yarn may be carried out after the yarn has been braided or woven into a braided cord, woven fabric, or knitted fabric. In this case, the yarn in the textile product such as the braided cord, woven fabric, or knitted fabric will be visually recognized as a diluted color of the first core component, and the entire textile product will also be visually recognized as a diluted color of the first core component.

[0012] The fiber products obtained by the method of the present invention are relatively rigid because the low-melting point polymer component is softened or molten and integrated, and therefore can be suitably used for shoe uppers, safety nets, blinds, etc. [Effects of the Invention]

[0013] The method for producing a textile product according to the present invention can obtain textile products with various shades of color by combining and processing a specific colored first multifilament yarn and a specific colorless transparent or translucent second multifilament yarn at different mass ratios, thereby achieving the effect of being able to rationally provide textile products with shades of color that meet the desires of consumers. [Example]

[0014] Example 1 A first multifilament yarn of 280 decitex / 48 filaments was prepared by bundling 48 core-sheath first composite filaments, each consisting of a black core component made of polyethylene terephthalate (melting point 260°C) mixed with a black pigment and a colorless, translucent sheath component made of copolymer polyester (melting point 161°C). Meanwhile, 48 core-sheath type second composite filaments, each consisting of a colorless, translucent core component made of polyethylene terephthalate (melting point 260°C) and a colorless, translucent sheath component made of copolymer polyester (melting point 161°C), were bundled together to prepare a second multifilament yarn of 280 decitex / 48 filaments. The mass ratio of the core component to the sheath component of the first core-sheath type composite filament and the second core-sheath type composite filament was core component:sheath component=2.7:1.

[0015] One first multifilament yarn and one second multifilament yarn were aligned, and then passed through a Kyoritsu Kikai ST-30 ring twister to give an S twist at a twist rate of 800 times / m to obtain a first twisted yarn. Two first twisted yarns were aligned, and then passed through a Kyoritsu Kikai ST-30 ring twister to give a Z twist at a twist rate of 600 times / m to obtain a flecked plied yarn.

[0016] The resulting mottled plied yarn was used to make an 8-strand braid using an 8-strand braiding machine. With both ends of the braid (approximately 40 cm long) fixed, it was heat-treated in a heat-resistant oven at 180°C for 2 minutes to obtain a gray braid. [Brief explanation of the drawings]

[0017] [Figure 1] 1 shows photographs of the mottled braid and gray braid obtained in Example 1. a is the mottled braid, and b is the gray braid.

Claims

1. preparing a first multifilament yarn formed by bundling a plurality of sheath-core first composite filaments, each of which comprises a first core component made of a colored high-melting-point polymer component and a first sheath component made of a colorless, transparent or colorless, translucent low-melting-point polymer component; preparing a second multifilament yarn in which a plurality of core-sheath type second composite filaments each including a second core component made of a colorless, transparent or colorless, translucent high-melting-point polymer component and a first sheath component made of a colorless, transparent or colorless, translucent low-melting-point polymer component are bundled; twisting the first multifilament yarn and the second multifilament yarn together in a spiral shape to obtain a yarn; and a step of subjecting the yarn to a heat treatment, A method for producing a textile product, characterized in that the heat treatment melts or softens the low-melting point polymer component constituting the core-sheath first composite filament and the core-sheath second composite filament in the yarn, thereby integrating the core-sheath first composite filament and the core-sheath second composite filament.

2. 2. The method for producing a fiber product according to claim 1, wherein the yarn is used to obtain a braid, knitted fabric or woven fabric, and then the braid, knitted fabric or woven fabric is subjected to a heat treatment.

3. 2. The method for producing a textile product according to claim 1, wherein the high-melting point polymer component constituting the sheath-core first composite filament and the sheath-core second composite filament is polyethylene terephthalate, and the low-melting point polymer component constituting the sheath-core first composite filament and the sheath-core second composite filament is a copolymer polyester.

4. 2. The method for producing a fiber product according to claim 1, wherein the first core component is colored with a pigment.

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