JPH0643643B2 - Polyester fiber for flocking - Google Patents

Description

TECHNICAL FIELD The present invention relates to a polyester fiber for flocking.

[Prior Art] In recent years, flocking has gained a wide range of applications by selecting a fiber substrate (material to be transplanted) and the like, and its development has been remarkable as one of the surface industries.

There are various flock processing methods, but the mainstream method is the electric flocking processing method. In the electric flocking process, a thermoplastic polymer substance is usually supplied in the form of chips or flakes to a melt spinning machine, melt-spun and stored in a can as undrawn yarn, and then undrawn yarn is drawn from many cans and bundled. It is stretched several times to produce a tow of several thousand to several hundred thousand denier, the tow is cut to an extremely short length (0.6 to 4.0 mm) depending on the application, and after scouring treatment, dyeing is performed to obtain flocs. Then, apply an electrodeposition treatment agent to the flock, and dry it to improve the electric flocking property in a high voltage field. Place the base cloth coated with the flock and the adhesive so as to face the two electrode plates, and apply the high voltage. Is added for flocking.

Commonly used fiber materials for flocking include polyester, polyolefin, polyacrylonitrile, and polyamide. Polyamide is the most suitable material because it is easy to dye and is adhesive.

On the other hand, while polyester fiber is rigid and has excellent wear resistance, it is inferior in cuttability when cut into flocks, miscut products are likely to occur, and the top end face of flocked products is uneven, and because of its rigidity, The flocs are deformed due to compression to generate chalk marks, and only a final product having a strong image of a bad product can be produced, which has a drawback that it is not attractive as a commercial value.

Furthermore, the polyester fiber has a low equilibrium water content of 0.5%, and has a poor affinity with an adhesive, resulting in poor electrodeposition.

Further, the polyester fiber is inferior in dyeability, and a carrier is required for dyeing under atmospheric pressure, and wastewater treatment of the carrier must be taken into consideration, resulting in extremely high cost.

[Object of the Invention] The present invention was devised in view of the above problems, and as a fiber for flocking, a polyester fiber for flocking which is excellent in electrodeposition property, chalk mark property, easy dyeability, texture and luster. For the purpose of providing.

[Structure of the Invention] The present invention has been achieved in order to solve the above-mentioned drawbacks of the prior art, and has the following constituent features.

That is, the main repeating unit was an ethylene terephthalate unit, and the intrinsic viscosity was obtained by copolymerizing 5-sodium sulfoisophthalic acid component with 2 to 6 mol% of all acid components and diethylene glycol with 1 to 3 wt% of polyester weight.
A polyester fiber made of a copolymerized polyester of 0.30 to 0.55, having a fineness of 7 denier or less, a boiling water shrinkage ratio of 8% or less, and a crimp number of substantially 0, and cutting the fiber length. A polyester fiber for flocking, which has a diameter of 10 mm or less.

The copolymerized polyester used in the present invention must have ethylene terephthalate as the main repeating unit, and the copolymerization amount of the 5-sodium sulfoisophthalic acid component must be in the range of 2 to 6 mol% with respect to the total acid component. is there. If it is less than 2 mol%, the equilibrium moisture content will drop to around 0.5% and the electrodeposition property at the time of flocking will be inferior, and the dyeability will not reach the level at which atmospheric dyeing can be performed without a carrier, and the texture will be hard and external force will be exerted. When receiving, chalk marks are likely to occur, which is not preferable.
On the other hand, if it exceeds 6 mol% with respect to the total acid components, the polymer viscosity during synthesis of the polymer becomes high and the fluidity deteriorates, making melt spinning difficult. Even if it is a flock product, the light fastness at the time of dyeing is deteriorated, which is not preferable.

The amount of diethylene glycol copolymerized with the polyester is 1 to 3% by weight based on the polyester produced during the polymerization.
This range is preferable from the viewpoints of improving the electrodeposition property at the time of flocking, improving the dyeability, softening the feeling, and preventing chalk marks.

The intrinsic viscosity [η] (measured with an o-chlorophenol solution at 25 ° C.) of the copolymerized polyester used for flocking of the present invention is preferably in the range of 0.30 to 0.55. If the intrinsic viscosity is less than 0.30, the handling property of the polymer at the time of polymerization and the melt spinnability will be deteriorated, and operating production will be difficult. Intrinsic viscosity [η]
If it exceeds 0.55, the polymerization reaction will take a long time, and the polymerization productivity will be decreased, which is not preferable.

Incidentally, the copolyester used in the present invention, if necessary, for example, a matting agent, a stabilizer, an antistatic agent,
You may include additives, such as a flameproofing agent.

After melt-spinning the copolymerized polyester by a known method,
Stretching is performed at an appropriate stretching ratio, and then heat treatment is performed without applying indentation crimp. After that, the fiber length is cut to 10 mm or less. As the polyester fiber of the present invention used for flocking, 6 mm or less is particularly preferable because it has good processability during flocking, that is, electrodeposition, and has a uniform flock surface and a good texture.

Fibers that are straight and do not bend are easy to electrodeposit and are desirable for flocking.

In addition, if the flocs easily contract heat during dyeing, they may easily curl, which may lead to a decrease in electrodeposition.
The shrinkage percentage after 10 minutes of treatment at 0 ° C) is kept to 8% or less. For this, a temperature of 100 ° C to 170 ° C for a few seconds to 12
It is desirable to heat-treat under tension or in a relaxed state for a time of 0 minutes.

The single yarn fineness of the polyester fiber of the present invention is preferably 7 denier or less. If it exceeds 7 denier, the texture becomes hard and chalk marks are likely to occur, which is not preferable. Particularly, when it is 1 denier or less, the texture becomes extremely soft, and a flocked product having a high-quality feeling can be obtained, which is desirable.

The cross-sectional shape of the polyester fiber may be circular or non-circular, but it is preferable that the cross-sectional shape is flat or multilobed and the degree of irregularity is 1.5 or more. Here, the degree of irregularity means the ratio of the circumscribed diameter (a) and the inscribed diameter (b) of the irregular cross section, or the ratio of the major axis length (a) and the minor axis length (b) of the flat cross section, that is, a /
b.

Alternatively, it is also desirable to use hollow fibers whose cross-sectional shape is circular or non-circular. Hollow rate is 3 ~
It can be used in the range of 90%.

[Effects of the Invention] The polyester fiber for flocking of the present invention described above has easy dyeability, electrodeposition property, feeling, gloss, chalk mark,
Extremely excellent in curling properties during dyeing.

The polyester fiber for flocking of the present invention is used for vehicle interiors (particularly ceiling materials, sheet materials, dashboard materials, etc.), toys, embroidery clothing, blankets, various decorative cases, wallpaper, various partial moldings. It is extremely useful for various fields such as products and footwear.

[Examples] The present invention will be described below with reference to Examples. The dyeability, electrodeposition, texture, chalk marks, and gloss in Examples were evaluated by the following methods.

(1) Easy dyeability Aigen Cahthilon uses the dyeing rate during floc dyeing as a dye.
Red GTLH (basic dye made by Hodogaya Chemical Co., Ltd.) is used, and the concentration is such that a dyeing solution is prepared so that the dye is 5% by weight with respect to the fiber to be dyed, and the bath ratio is 1: 100.
After dyeing at 100 ° C. for 60 minutes, the dyeing rate was calculated according to the following formula, and a dyeing ratio of 70% or more was defined as a level of good dyeability.

A: Dye concentration of the dyeing stock solution before dyeing B: Dye concentration of the dyeing solution after dyeing (2) The flocking strength of the cloth electro-deposited with the electrodeposition floc is JIS L1084,
Flocking strength A-1 Item 45R method is good when there is little flock dropout after 5000 rubs in a dry state and the background is not exposed (marked with ○), and lots of flock dropout after 1000 rubs and the background is exposed The case was poor (marked with X), and after 1000 rubs there was little flock loss and no exposure of the background, but after 5000 rubs there was a lot of flock loss and the background was exposed a little (marked Δ).

(3) The flock surface of the cloth on which the textured flock was electrodeposited was judged by touch. It was judged that the softness was extremely good (marked with ⊚), the software was good (marked with ○), the middle between the softness and the roughness was slightly good (marked with Δ), and the rattling was bad (marked with ×).

(4) Chalk mark An x mark indicates that when the flock of cloth that has been electro-deposited with flock is strongly compressed with a finger from above, the flock in the compressed part becomes loose and has a different hue from the uncompressed part, resulting in a chalk mark. The case where it did not occur was marked with a circle, and the middle of these was marked with a triangle.

(5) The flock surface of the cloth on which glossy flock was electrodeposited was visually evaluated. The soft gloss was judged to be ○, and the absence was judged to be X.

[Example 1, Comparative Example 1] As shown in Table 1, the copolymerization amount of 5-sodium sulfoisophthalic acid (K ₂ agent) and diethylene glycol (DEG) was 4.5 mol% based on the total acid components, and the total production was 2% by weight in polymer (Example 1), 4.5 mol%, 0% by weight
As Comparative Example 1, polyethylene terephthalate having an intrinsic viscosity of 0.40 (measured with an o-chlorophenol solution at 25 ° C.) was passed through a yarn-proofing mouthpiece having 500 hole mouthpieces at a yarn-proofing temperature of 280 ° C., and a yarn-proofing speed of 800 m / The cans were collected in minutes. The undrawn yarn thus obtained was drawn 3.0 times at 65 ° C. and then subjected to relaxation heat treatment at a temperature of 140 ° C. for 30 minutes. The obtained polyester fiber had a single yarn fineness of 1.5 denier and was cut to obtain a floc having a fiber length of 2 mm.

After dyeing the flocs, the flocs were immersed in a treatment solution containing sodium silicate, colloidal silica, and potassium isopropyl phosphate, dehydrated, and dried to form flocks for surface implantation (surface leakage resistance 3 × 10 ⁸ Ω · cm).

As a base fabric, a blended flat fabric of 65% polyester and 35% rayon (weight per unit area: 120 g / m ² ) is used, and as a binder, a polyether type polyurethane DMF solution (25 liquid: viscosity 80,000 centipoise (25 ° C)) is 300 g / m 2. ^It was applied with a knife coder so that it would be ^2, and the hair was planted by the up method electroplantation M / C (voltage 30,000 V, distance between electrodes 10 cm). Pile flocking density is 140 g
/ M ² .

After flocking, it was dried at 120 ° C.

The results are shown in Table 1. Example 1 in which both 5-sodium sulfoisophthalic acid and DEG were copolymerized had good dyeability, electrodeposition, feel and chalk marks.

[Examples 2 to 7 and Comparative Examples 2 to 7] Except that in Example 1, the copolymerization amount of 5-sodium sulfoisophthalic acid or DEG or the intrinsic viscosity was changed as shown in Table 1 and completely. The same process was performed.
The results are shown together in Table 1.

When 5-sodium sulfoisophthalic acid and DEG were not copolymerized at all (Comparative Example 2), dyeability, electrodeposition property,
Both the texture and the characteristics of the chalk mark were poor.
When the amount of copolymerization of DEG was excessive, the yarn-proof tone was lowered, and the properties such as electrodeposition property, feeling, choke mark, etc. were deteriorated.

When the copolymerization of 5-sodium sulfoisophthalic acid and DEG is excessive (Comparative Example 5), the intrinsic viscosity is extremely low (Comparative Example 6), or the intrinsic viscosity is high (Comparative Example 7), the production of the polymer is observed. Poor meltability and poor melt spinnability,
I gave up.

[Examples 8 to 16] The same treatment as in Example 1 was carried out except that the fiber length, boiling water shrinkage (BWS) and fineness were changed as shown in Table 2. The results are shown in Table 2, and there was no curl at the time of dyeing, and the electrodeposition and the feel were good. In particular, the feel of Example 14 having a fineness of 0.5 d was extremely soft and good.

[Comparative Examples 8 to 10] In Example 1, the fiber length, BWS, number of crimps, and fineness were changed as shown in Table 2. If the BWS is too high (Comparative Example 8), curls of flocs occur during dyeing, and the electrodeposition property deteriorates. Even when the number of crimps is large (Comparative Example 9), the flock has a bend, so that the electrodeposition property is deteriorated. Also,
If the fineness is too thick (Comparative Example 10), the texture tends to be rough and the quality is deteriorated, which is not preferable.

[Examples 17 to 20] The same process as in Example 1 was carried out except that the cross-sectional shape of the fiber was changed. The results are shown in Table 3.

In the case of the flat cross section (Example 17), the texture was extremely soft and good. It is good in terms of gloss and chalk marks and any irregular cross section.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeru Ito 1-1-11 Minamihonmachi, Higashi-ku, Osaka-shi, Osaka Within Teijin Limited (72) Inventor Kacho Karasawa 1-1-11 Minamihonmachi, Higashi-ku, Osaka-shi, Osaka (56) Reference JP 60-155745 (JP, A) JP 59-127750 (JP, A) JP 58-54039 (JP, A) JP 56-31073 (JP , A)

Claims (4)

[Claims] 1. A main repeating unit is an ethylene terephthalate unit, a 5-sodium sulfoisophthalic acid component is copolymerized in an amount of 2 to 6 mol% with respect to the total acid component, and diethylene glycol is copolymerized in an amount of 1 to 3 wt% based on the weight of the polyester. A polyester fiber composed of a copolyester having an intrinsic viscosity of 0.30 to 0.55, which has a fineness of 7 denier or less, a boiling water shrinkage of 8% or less, and a crimp number of substantially 0 is cut. Polyester fiber for flocking with a fiber length of 10 mm or less. 2. The flocking polyester fiber according to claim 1, wherein the single yarn fineness is 1 denier or less. 3. A fiber cross-sectional shape, a flat shape, or a multi-lobed cross-section with a degree of deformation of 1.5 or more.
Polyester fiber for flocking according to item (2). 4. A fiber according to claim 1, wherein the fiber is a hollow fiber.
The polyester fiber for flocking according to any one of items (1) to (3).