JP2854070B2 - Pile fabric for vehicle interior - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a polyester pile fabric used as a vehicle interior material.

[Related Art] Various types of fabrics such as leather-like materials, woven or knitted fabrics, or pile fabrics such as brushed or moquette fabrics are used as vehicle interior materials. Above all, pile fabrics, which are widely used as vehicle interior materials, are widely accepted as high-grade materials because they have naps on the surface, but the need for higher quality and luxury is increasing.

Pile fabrics used for vehicle interiors include those obtained by raising tricots, those obtained by shaving pile knitted fabrics, and pile fabrics obtained by double raschel knitting or moquette weaving.
Many of these use synthetic fibers such as nylon and polyester. In particular, for vehicle interior materials,
Since high light fastness is urgently required, applications of polyester fibers are increasing.

Synthetic fibers typified by polyester in terms of abundance of materials used and handleability, compared to natural fibers such as wool,
It has an overwhelmingly superior feature, but on the other hand, as compared to the appearance of wool pile fabric, which is a representative of natural fiber pile fabric, as it is expressed at first glance as being monotonous or plastic-like It is said to be inferior in terms of appearance luxury. In particular, the so-called white blur phenomenon that appears whitish depending on the viewing direction and angle is a major drawback that impairs the luxuriousness of pile fabrics using synthetic fibers, and particularly, in pile fabrics using polyester fibers for pile yarns, seat belts Marks such as metal fittings remain, and the phenomenon of concave-shaped hair falling has begun to be noticed as a problem in terms of quality.

The white blur phenomenon referred to here is more likely to occur as the pile yarn of the pile fabric has a directional property, the greater the degree thereof, the greater the degree. In other words, if the pile thread's nap angle is tilted toward the viewer, it looks dark to the viewer, but if the pile thread nap direction is not tilted toward the viewer, the viewer will be Is considerably lighter than the hue of the original pile, and depending on the color, it may look rather whitish.

Many attempts have been made recently to improve the white blur phenomenon. For example, Japanese Patent Application Laid-Open No. 62-268855 or
In JP-A-63-105143, a polyester fiber used as a pile yarn has a core-sheath type structure, and a sheath component is designed to be dyed more densely than the core component. However, these means have drawbacks such as sacrifice of important performance required for vehicle interior materials, such as light fastness.

On the other hand, in order to improve color depth and sharpness when dyeing polyester fibers, polyester fibers containing fine particles having an average temporary particle diameter of less than 100 mμ are subjected to alkali weight reduction treatment, and the surface of the fibers is exposed to visible light. There are known methods for forming a large number of fine irregularities on the order of the wavelength region or more (for example, JP-A-55-107512, JP-A-55-107512).
No. 57-139118). By applying these methods to nap-up fabric, the depth of color when the obtained pile fabric is viewed from a certain direction is improved, and a remarkable effect is exhibited. However, even with this method, the above-mentioned white blur phenomenon has not been eliminated.

Also, there have been few attempts to improve the so-called hair fall phenomenon in which marks such as metal fittings of the seat belt remain.

[Object of the Invention] An object of the present invention is to improve the hair falling phenomenon as well as the white blur phenomenon, and to improve the quality, which was a problem of the pile fabric using the conventional polyester fiber, to provide a more luxurious pile fabric. To provide.

[Constitution of the Invention] Here, the present invention provides: 1) A pile fabric for vehicle interiors in which the entire pile yarn is made of a polyester modified cross-section yarn having a single yarn fineness of 2 denier or more, and the pile yarn has a nap angle of 50 ° or more. 3. The pile fabric for vehicle interiors according to claim 1, wherein said pile yarn is a modified cross-section yarn having a fiber cross-section comprising two concave portions and four or more convex portions, comprising a polyester of a single composition.

It is.

Here, the polyester fiber means, for example, terephthalic acid as a main acid component and at least one glycol, preferably at least one alkylene glycol selected from ethylene glycol, trimethylene glycol and tetramethylene glycol as a main glycol component. Polyester. The polyester fiber may be a filament or a spun yarn. Also, if necessary, stabilizers,
Antioxidants, flame retardants, antistatic agents, optical brighteners, catalysts,
Coloring inhibitors, heat-resistant agents, coloring agents, inorganic particles and the like may be used in combination.

The pile fabric referred to herein refers to pile fabrics such as moquette, velvet and velveteen, brushed tricot, double raschel, pile knitted fabric having pile or shaving pile.

The modified cross-section yarn having two concave portions and four or more convex portions referred to in the present invention is a variant having four or more convex portions and having two concave portions formed when connecting the vertexes of adjacent convex portions. Refers to cross-section yarn.

 FIG. 2 shows an example of a specific cross-sectional shape.

The pile yarns having these irregular cross-sectional shapes are effective in improving white blur / hair fall because the unevenness of the cross-sectional shape increases the bending rigidity of the pile yarn and keeps the pile yarn's napped angle high, so that the viewing direction This is because the white blur phenomenon that the hue of the pile surface greatly changes depending on the direction of the pile yarn due to the pile yarn is reduced, and the pile yarn is less likely to be deformed by the force applied to the pile surface.

It is necessary that the number of concave portions in the fiber cross section of the pile yarn is two. Deformed yarns with three or more recesses have higher bending stiffness and are highly effective in preventing hair falling, but too high bending stiffness results in a rough touch on the pile surface and is used for vehicle interiors. Has a problem with the hand.
In order to reduce such problems, attempts have been made to reduce the fineness.However, when the fineness is reduced to form more irregularities in the fiber cross section, there is also a problem of deformation when repeatedly used for vehicle interiors. This is not always desirable as it occurs.

On the other hand, it is necessary that the average raising angle of the pile of the pile fabric is 50 ° or more. If the average nap angle is less than 50 °, the hair is more likely to fall off, which is not preferable.

Further, in order to further improve the white blurring phenomenon and the hair falling phenomenon, the amount of the matting agent in the polyester fiber is 0.1 to 2.0% by weight.
Is very effective.

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples.

In the practice, each characteristic was evaluated by the following method.

i. Hair fall properties i-1. Hair fall treatment A brass weight (8 cmφ, 2000 gr) was placed on a pile cloth, placed in a hot-air dryer adjusted to 80 ° C., and left for 2 hours. Two hours later, the sample was taken out of the hot air drier and the weight was removed.

i-2. Evaluation of hair fall property Variable angle spectrophotometry system manufactured by Murakami Color Research Laboratory Co., Ltd.
It was measured using CCMS-3. When the pile fabric surface is viewed from the direction in which the hair fallen portion looks whitish, that is, the direction opposite to the direction in which the tip of the fallen pile yarn is facing, the pile looks whitish, but the light receiver is placed in this direction (θ = 70).
Ii) The L ^* value of the CIE color system was determined while changing the light incident along the direction in which the tip of the pile yarn was facing from the light receiver side.
This measurement is performed on the part where the hair has fallen and the part where the hair has not fallen. The greater the difference between the two is, the more noticeable the whitishness due to the hair fall is.

The perpendicular to the pile fabric is set at 0 °, and the L ^* value (L ^* _A ) of the hair breakage portion and the hair breakage at intervals of 10 ° within a range of 50 ° to −50 ° with respect to the inclined direction of the pile yarn. The L ^* value (L ^* _B ) of the non-existent portion was read, and the maximum value of the color difference between the broken portion and the normal portion, that is, ΔL ^* (= L ^* _A− L ^* _B ) was determined, and this was taken as the hair breakability value. The higher the hair fall property value, the more noticeable the hair fall.

ii. Napped Angle An enlarged cross section of the pile fabric was photographed with an electron microscope, the angle of the tip of the pile with respect to the ground structure was actually measured, and at least 20 pile yarn angles were averaged to obtain the pile yarn napped angle.

Example 1, Comparative Examples 1 to 3 Polyethylene terephthalate having an intrinsic viscosity of 0.64 and containing 0.5% by weight of TiO ₂ was spun at a spinning temperature using a 200-hole die having the shape shown in FIGS. 1 (1) to (3). The yarn was spun under the conditions of 296 ° C. and the discharge amount shown in Table 1, and was wound at a speed of 1500 m / min to obtain an undrawn yarn. The obtained unstretched yarn was ligated and made into a 10,000 denier tow, stretched at a magnification shown in Table 1 in a water bath at 80 ° C., heat-set with a roller at 180 ° C., and then crimped to 140 ° C. , And cut to 51 mm to obtain a polyester short fiber having an H-shaped cross section of a 3 denier single yarn fiber.

Example 1 was the same as Comparative Example 1 except for the conditions shown in Table 1 and other conditions.
Under the same conditions as above, a polyester short fiber having a cross-shaped irregular cross section having four concave portions was obtained. Comparative Example 2 is a polyester short fiber having a denier of 1.5 and a T-shaped irregularly shaped yarn. Further, as Comparative Example 3, a polyester short fiber having a round cross section was prepared by an ordinary method.

The obtained polyester staple fiber was worsted and spun by an ordinary method to obtain a spun yarn having a count of 1/52. Next, the spun yarn is dyed beige with a disperse dye in a normal yarn dyeing process,
The yarn was dyed for moquette.

This dyed yarn is used as a pile yarn, and the ground yarn is a normal polyester fiber / rayon fiber (mixture ratio 65/35) 20th twin yarn, the moquette structure is 1 knit, the pile density of the woven fabric is 22 warp / inch, Create moquette fabric with a weft density of 44 / inch,
This was processed in a usual manner and then back coated to obtain a moquette fabric.

Table 2 shows the evaluation of the standing angle of the obtained moquette fabric and the falling property of the pile.

Using a die of Example 2 intrinsic viscosity polyethylene terephthalate shape hole number 24 shown in phthalate FIG. 1 (2) containing TiO ₂ 0.5% by weight 0.64, a spinning temperature of 295 ° C., the discharge amount of the conditions shown in Table 3 , And wound at a speed of 1300 m / min to obtain an undrawn yarn. Then, drawing was carried out under the following conditions to obtain a modified cross-section yarn having an H-shaped cross section of 75 denier / 24 filaments.

The obtained irregularly shaped cross-section polyester filament SD75 denier / 24 filament is used for the front, and the middle and back are each a normal round cross-section polyester filament SD75 denier / 36 filament, respectively, for the front 1078, middle 1023, and back 1012. A tricot knitted fabric was knitted at a density of 28 gauge in the tissue.

The resulting tricot knitted fabric was scoured and set by a conventional method, and then dyed in an orange color. Thereafter, a napping agent was padded and dried, and then the front yarn was cut and nap-raised, then shirred to adjust the pile length to 2 mm, brushed to perform nap-raising treatment, and then dried at 170 ° C. for 30 seconds. The average standing angle of the obtained tricot was 62 °.

[Stretching conditions] Stretching temperature: 80 ° C Heat treatment temperature: 150 ° C Stretching speed: 500 m / min Comparative Example 2 SD of polyester filament having a normal round cross section
Knitting and processing were performed in the same manner as in Example 2 except that 75 denier / 36 filament was used for the front. The average raised angle of the obtained tricot was 47 °.

Table 4 shows the napped specialty and the hair falling behavior of the pile knitted fabrics obtained in Example 2 and Comparative Example 4.

As shown in the above examples, all of Examples 1 and 2 have a small hair-falling characteristic value, and the hair-falling portion is not conspicuous even after the hair-falling treatment, indicating that the hair-falling prevention effect is excellent.

[Brief description of the drawings]

FIGS. 1 (1), (2), and (3) are cross-sectional views of a die, and FIG. 2 is a cross-sectional view of a modified fiber.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-50552 (JP, A) JP-A-63-6133 (JP, A) JP-A-3-97946 (JP, A) JP-A-3-97 90651 (JP, A) JP-A-3-64550 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) D03D 15/00 D03D 27/00 D01F 6/62 303

Claims (1)

(57) [Claims] 1. A pile fabric for vehicle interiors in which the entire pile yarn is made of a polyester modified cross-section yarn having a single yarn fineness of 2 denier or more, and the pile yarn has a nap angle of 50 ° or more. Consisting of one composition polyester,
A pile fabric for vehicle interiors, which is a modified cross-section yarn having a fiber cross section composed of two concave portions and four or more convex portions.