JP2002129451A - Pile fabric for vehicle interior - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pile fabric for vehicle interior improved in spinnability while keeping multicolor property in the pile fabric for vehicle interior obtained by interknitting a regular polyester fiber with a basic dye-dyeable polyethylene terephthalate fiber. SOLUTION: This pile fabric for vehicle interior is obtained by interknitting a spun yarn A composed of a core-sheath type conjugate short fiber containing, as a sheath component, a copolyester containing ethylene terephthalate as a main recurring unit and copolymerized by using 5-sodium sulfoisophthalic acid as a third component and containing polyethylene terephthalate as a core component with a spun yarn B composed of polyester short fiber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pile fabric for a vehicle interior. More particularly, the present invention relates to a pile fabric for a vehicle interior which is excellent in polychromaticity using raw cotton having good spinnability.

[0002]

2. Description of the Related Art Heretofore, tricot napping, double raschel knitting and moquette piles have been widely used for car interior materials such as car seat skin materials and door interior materials for transportation vehicles. Many have used synthetic fibers such as nylon and polyester. In particular, polyester mainly polyethylene terephthalate has been recognized for its excellent mechanical properties and light resistance,
Its usage is increasing. Further, in recent years, due to consumers' desire for higher quality, more and more multi-colored vehicle interior materials having a complicated design have been favored, and various multi-coloring methods have been devised. As the most typical example, two or more kinds of fibers having different dyeing properties, that is, a regular polyester fiber and a basic dye-dyeable polyethylene terephthalate fiber are mixed and knitted in a pile portion, and each pile yarn is dispersed with a disperse dye and a basic dye. There is a method of dyeing different colors, which makes it possible to express various designs such as heather. However, the basic dye-dyeable polyethylene terephthalate used in this method has a much higher viscosity during melt spinning than regular polyethylene terephthalate. The fiber strength was low. Therefore, in order to operate stably without causing breakage of the spinning, the spindle rotation speed must be reduced to cope with the problem, and there is a problem that the spinnability is lower than that of regular polyethylene terephthalate fiber.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to improve the spinnability of a pile fabric for a vehicle interior made by cross-knitting regular polyester fiber and basic dye-dyeable polyethylene terephthalate fiber while maintaining polychromaticity. Another object of the present invention is to provide a pile fabric for a vehicle interior.

[0004]

The present invention has the following structure to solve the above-mentioned problems. That is, a spun yarn A comprising a core-sheath type composite short fiber having ethylene terephthalate as a main repeating unit, a copolyester copolymerized with 5-sodium sulfoisophthalic acid as a third component as a sheath component, and polyethylene terephthalate as a core component. And a spun yarn B made of polyester staple fiber.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

In the present invention, the core-sheath type composite short fiber constituting the spun yarn A has ethylene terephthalate as a main repeating unit as a sheath component, and 5-sodium sulfoisophthalic acid (hereinafter, referred to as SSI) as a third component. A copolymerized copolyester is used. Preferably, SSI is contained in an amount of 2.5 to 6.0 mol% based on all the acid components constituting the copolyester. If the copolymerization ratio of SSI is less than 2.5 mol%, the number of dyeing seats of the cationic dye is so small that a unique dark color cannot be obtained at the time of dyeing. Even if the content exceeds 6.0 mol%, the color developability does not change, the viscosity during melt spinning increases, and the spinnability deteriorates. Polyethylene terephthalate is used as a core component of the core-sheath type composite short fiber constituting the spun yarn A. A small amount of isophthalic acid or adipic acid may be copolymerized with the polyethylene terephthalate, but it is preferable to use unmodified polyethylene terephthalate which can be produced at low cost.

[0007] By using polyethylene terephthalate as the core component, the strength of the single fiber can be increased, and the spinnability, which is a drawback of the conventional basic dyeable polyethylene terephthalate short fiber, can be improved. It becomes possible.

In the present invention, the core-sheath composite short fiber constituting the spun yarn A has a core-sheath composite weight ratio of 30:70.
７０70: 30 is preferred. Core component ratio is 70
If it is higher, although the strength of the single fiber increases, the cross section of the spun yarn A after dyeing with a disperse dye and a cationic dye becomes lightly dyed, so that a sufficient multicolor effect as a pile fabric for vehicle interior is not obtained, so that it is preferable. Absent. On the other hand, when the core component ratio is 3
If it is lower than 0, a multicolor effect can be obtained without the cross section of the spun yarn A being lightly dyed. However, since the single fiber strength is weak, a large effect of improving spinnability cannot be expected, which is not preferable. The form of the core-sheath composite is not particularly limited, and the composite can be formed in a concentric shape or an eccentric core-sheath shape. However, from the viewpoint of productivity, the composite is preferably formed in a concentric shape.

In the present invention, the polyester constituting the spun yarn B is not particularly limited, and polyethylene terephthalate, polypropylene terephthalate, polybutylene retephthalate and the like can be used, but polyethylene terephthalate which is inexpensive and has excellent mechanical properties is used. It is preferable to use The fiber cross section is not particularly limited, and any cross section such as a round cross section, a square cross section, a hollow cross section, an Yaba cross section, an H-shaped cross section, and a Y-shaped cross section can be used. Further, the spun yarn B may be produced from a single polyester short fiber, or may be produced by blending two or more kinds of polyester short fibers.

In the present invention, it is preferable that the sheath component and the core component of the spun yarn A contain inorganic particles in order to prevent the surface of the pile fabric from becoming whitish depending on the viewing angle. The content of the inorganic particles is preferably 0.05 to 1% by weight, more preferably 0.20 to 0.40% by weight, for both the sheath component and the core component.

From the above viewpoint, it is preferable that the polyester short fibers constituting the spun yarn B also contain inorganic particles, and the content of the inorganic particles is preferably 0.05 to 3.0.
% By weight, more preferably 0.20 to 2.5% by weight.

As the inorganic particles, compounds such as titanium dioxide, barium sulfate, zinc oxide, silica, cerium oxide, and calcium carbonate can be used, but it is preferable to use titanium dioxide which is the cheapest and is widely used.

The pile fabric for a vehicle interior according to the present invention is obtained by, for example, tricot knitting the above-mentioned spun yarn consisting of the spun yarn A and the spun yarn B, cutting and then raising the pile yarn, or moquette weaving and double raschel knitting. After the dyed pile fabric is dyed with a disperse dye and subsequently dyed with a basic dye.

The pile fabric for a vehicle interior according to the present invention can be used for at least a part of members used for the interior of a transport vehicle such as a passenger car, a truck, a bus, a railroad, a ship, an aircraft, and the like. It can be preferably used for door interior materials.

[0015]

The present invention will be described in detail with reference to the following examples.
In addition, each characteristic value was obtained by the following method. (1) Intrinsic viscosity [η] It was determined from solution viscosity measured at 25 ° C. using o-chlorophenol as a solvent. (2) Polychromaticity of pile fabric for vehicle interior Judgment was made visually. Example 1 An intrinsic viscosity [η] obtained by copolymerizing 2.5 mol% of SSI with respect to ethylene terephthalate unit was 0.50, and a copolyester containing 0.30% by weight of titanium dioxide was used as a sheath component. Is 0.62 and titanium dioxide is 0.3
As a core component, unmodified polyethylene phthalate containing 0% by weight is stretched after composite melt-spinning at a core-sheath composite weight ratio (core: sheath) of 50:50, staple processing, and a single fiber fineness of 2.8 dtex in a round section; A composite short fiber having a fiber length of 51 mm was obtained, and a spun yarn A of 30S was produced. In addition, using unmodified polyethylene phthalate having an intrinsic viscosity [η] of 0.62 and 2.0% by weight of titanium dioxide, a polyester short fiber having a single fiber fineness of 1.7 dtex and a fiber length of 51 mm in a round cross section is obtained. Thus, a spun yarn B of 30S was prepared. The spun yarns A and B were twisted at a ratio of 1: 1 and then double-rasled, cut and then dyed with a disperse dye and a basic dye to obtain a pile fabric for vehicle interior. The spinnability of the spun yarn A is good, and the polychrome of the pile fabric for vehicle interior is also good. Comparative Example 1 A copolyester containing 2.5 mole% of SSI with respect to ethylene terephthalate unit, intrinsic viscosity [η] of 0.50, and titanium dioxide of 0.30% by weight was used as a single component, and a circular cross section was used. 2.8 dtex single fiber fineness, fiber length 5
A pile fabric for vehicle interior was obtained in the same manner as in Example 1 except that a 1 mm short fiber was obtained to produce a spun yarn A of 30S. The polychromaticity was good, but the spinnability of spun yarn A was poor. Example 2 Core-sheath composite weight ratio of composite short fibers constituting spun yarn A
A pile fabric for vehicle interior was obtained in the same manner as in Example 1 except that (core: sheath) was 35:65. The spinnability of the spun yarn A is improved, and the polychromaticity is also good. Example 3 Core-sheath composite weight ratio of composite short fibers constituting spun yarn A
A pile fabric for vehicle interior was obtained in the same manner as in Example 1 except that (core: sheath) was 65:35. The spinnability of the spun yarn A was good, and polychromaticity was also obtained.

[0016]

[Table 1]

[0017]

According to the present invention, it is possible to provide a pile fabric for a vehicle interior excellent in spinnability while maintaining polychromaticity.

Claims (2)

[Claims] 1. A core-sheath composite short fiber comprising ethylene terephthalate as a main repeating unit, a copolyester copolymerized with 5-sodium sulfoisophthalic acid as a third component, a sheath component, and polyethylene terephthalate as a core component. A pile fabric for vehicle interiors, comprising a cross-knitting of a spun yarn A and a spun yarn B made of polyester short fibers. 2. The vehicle according to claim 1, wherein the core / sheath composite short fiber constituting the spun yarn A has a core / sheath composite weight ratio (core: sheath) of 30:70 to 70:30. Pile fabric for interior.