JPS5971474A - Fiber molded article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention A fiber molded product made of the organic synthetic fiber of the present invention is irradiated with low-temperature plasma to form fine irregularities on the fiber surface. This invention relates to a good fiber molded product.

Conventionally, various organic synthetic fibers have had drawbacks such as a characteristic waxy feeling due to the smoothness of the fiber surface, a lack of specular luster, or an inability to obtain the depth of color compared to wool. In addition, a method of irradiating organic synthetic fibers with glow discharge plasma to improve water absorbency and stain resistance has been used, and glow discharge plasma treatment has been used. Attempts have also been made to improve the stain resistance and dyeability by grafting reactive monomers onto the fibers after treatment.

The present invention is different from such known inventions, and proposes a fiber molded product in which fine irregularities are formed on the surface of organic synthetic fibers, giving the dyed organic synthetic fibers a deep color without losing their luster. It is. As will be understood later, the present inventor has discovered that by forming fine irregularities on the surface of synthetic fibers, the color of the dyed product becomes deeper and the luster characteristic of synthetic fibers is not lost. We have found that matting and effects can be produced at the same time, but the present invention has found seven advantages in that it is possible to utilize color depth effects while maintaining gloss.

That is, the present invention provides a method in which the surface of at least a portion of each fiber located on at least one side of a fiber molded article made of organic synthetic fibers, which appears outside the molded tissue, is irradiated with glow discharge plasma, and then the depth or height is increased. The fiber molded article is characterized in that irregularities larger than 0.01 micron and less than 0.1 micron are formed at a density of 10 to 200 per square micron.

The fiber moldings made of organic synthetic fibers used in the present invention may be filament yarns or spun yarns of fibers such as polyester or polyamide, or knitted or woven fabrics made by knitting and weaving these fibers, and these fiber moldings may be dyed. It may be subjected to such processing.

In order to increase the depth of color while preserving the gloss of organic synthetic fibers, the present invention requires that a fiber molded product be formed so that at least the outer surface of the tissue of the fiber bundles located at least on the surface side of the molded product is It has been found that it is sufficient that the surface of the part has irregularities that satisfy the above-mentioned conditions.

Here, the unevenness formed on the bundles of fibers constituting the fiber molding has a higher emissivity of visible light in dogs than 0.5 microns, which causes dullness in color. The unevenness is 0.1)/0.5 micron, but if the unevenness is smaller than that, that is, less than 0.1 micron and larger than 0.01 micron, it has a practical color depth effect. It was also found that the gloss was preserved.

If the unevenness is 0.01<Kron F or less, the low F reflectance cannot be observed and the drawbacks of conventional organic synthetic fibers cannot be improved. In addition, if there are fewer than 10 of these irregularities per square micron, the depth of the color of the fiber can be added to I"4, but if there are more than 200, the depth of the color of the fiber can be increased without reducing the reflectance. Since the unevenness is not expressed and the strength of the single fiber is deteriorated, it is necessary that the unevenness is formed on the surface of the single fiber at a density of 10 to 200 unevenness per 1 square micron.

The unevenness as shown in L is more suitable than Effect-F if the unevenness covers the entire surface of the fiber bundle without any gaps, but the unevenness is more suitable than Effect-F. As long as it is formed on at least the surface of the part that appears on the outer surface of the tissue, there will be no practical problem.

Next, a method for obtaining the above-mentioned fiber molded article will be explained. In the present invention, a molded article made of organic synthetic IA fibers is irradiated with claw discharge plasma. The plasma is a gas discharge different from an arc discharge or a corona discharge, and a gas such as air, nitrogen, argon, helium, neon, etc., preferably air or argon, is used as the ion species constituting the plasma. Plasma is generated using a PIt source or the like.

In this case, it is preferable to generate plasma between electrodes with an electrode spacing of 1Qon or more, preferably 5m or less, more preferably 2 (7) or less, using an AC alternating frequency source in an atmosphere with a vacuum degree of mmHg or less. When the degree of vacuum is high, the distance between the electrodes can be increased, and when the degree of vacuum is low, the distance between the electrodes can be decreased.

The electrodes can be either pairs of plate-shaped or rod-shaped WE electrodes, or combinations of rod-shaped electrodes and drum-shaped or plate-shaped electrodes.

In the present invention, a fiber molded product is statically placed or moved between electrodes and irradiated with glow discharge plasma.
Fine irregularities are produced on the surface of the fibers constituting the molded article, but the current density of the plasma applied to the fiber surface is 0.1-5.
0 mA/ctA preferably 17< is 1.0 to 3, 0 mA
/crA is desirable. Current density is 0.1mA
If it is lower than 5.0 mA/'t→, the irradiation period will be too long and is not practical, and if it exceeds 5.0 mA/'t→, the fibers will be damaged. In addition, 80 to 50 (
)mA -sec/- is good, 150~3 (10mA
-sec/- is preferred.

If the fiber molded product is placed at a position 1rt midway between both electrodes and irradiated with plasma, both surfaces of the molded product will have improved color development due to the plasma, but the effect will not be good. If the fiber molded product is placed in contact with one of the electrodes,
The part of the molded product that is not in contact with the electrode is the surface where the color development is improved, but the effect is more pronounced in this case. As mentioned above, the fiber molded product obtained also has sufficient effects on one side.

The present invention is capable of creating unevenness of LO to 200 pieces/1 square micron fiber by irradiating the fiber molded article with the above-mentioned qualitatively and quantitatively defined plasma. As a result, the depth of the color of the dyed product is developed while preserving the luster of the fiber, based on the scattering or cancellation phenomenon of visible light reflected by the fine irregularities on the fiber surface.

The present invention will be explained below with reference to Examples.

Example 1 A fabric made of black-dyed polyester filament was placed at the middle distance between both electrode plates with a distance between the electrodes of 2 cln, and the vacuum level was 0.4 mn Hg (air), the distance between the electrodes, and the pressure. ; 500 V, current density; 2.5 rnA
/crh, power source: 60H7 (100V) and irradiated for 0 seconds, 10 seconds, 20 seconds, and ] minutes for plasma treatment.

In this way, the reflectance of the plasma-treated fabric is
[:Measurements were made using a spectrophotometer EPR-2 model, and changes in color density were determined from changes in reflectance, depth of unevenness on the fiber surface, etc. were determined from electron micrographs, and the results are shown in Table 1. show.

In the case where the M l surface plasma was irradiated for 10 seconds, the unevenness of the fiber surface 1hi was 001μ or less, the decrease in reflectance was small, the depth of color did not appear, and the luster effect [7] did not appear. On the other hand, plasma was irradiated for 20 seconds) F.

Those with f#, the unevenness of the fiber surface are (1,01 or more), the low F of the reflectance is more advanced, and the color is deeper.
The wood has been preserved, giving it a silk-like color and luster. In addition, when plasma was irradiated for 1 minute, the unevenness on the fiber surface became 01 μm, the low pitch of the reflective screen was observed at 02 μm, and the depth of the color increased significantly, but a fading effect was also observed. became.

The density of the formed irregularities was approximately 15 times per 1 square meter in each case.

Plasma treatment was performed by irradiating for ( ) seconds, 10 seconds, 20 seconds, 30 seconds, and 90 seconds.

The results are shown in Table 2.

Table 2: The fiber surface irradiated with plasma for 10 seconds has no unevenness.
01 tz or less, the decrease in reflectance was small, and no color depth effect was expressed. For this 7L, 77:
Mat 20 seconds irradiation L7'j Mono iJ1, RK i:e
, ! -z +hl σ) Gate convex furnace)\ becomes 0.01, and the decrease in reflectance also decreases.
Color σ) Depth is recognized and gloss is preserved. 1st. This is a very useful effect for I-use.

In addition, when the fiber surface was irradiated with plasma for 30 seconds, the unevenness of the fiber surface became 01μ, the low reflectance T was increased by 02%nJ, and the depth of the color and the decrease in light) were observed. Furthermore, when plasma was irradiated for 90 seconds /ζ and σ], the unevenness of the fiber surface became 0. i 5 It, the reflectance decreased by 0.5 cm, the color depth was significantly increased, and the fiber became matte. also increased.Also, the unevenness formed f]
On average, there are about 20 particles of 1 square micron in size.

Example 3 A fabric made of polyester filaments dyed black was placed on top of a rod-shaped 'A' with an electrode spacing of 1"I 5 cm; a drum-shaped 11 of a plasma treatment J11 apparatus consisting of a pole and a 1° ram-shaped electrode. The plasma irradiation conditions were 0.15 wdlg (oxygen gas), interelectrode voltage: 450 V, current density T: 3 mA/-,
Plasma treatment was performed by changing the residence time in the plasma to 10 seconds, 20 seconds, and 30 seconds.7j□i! Table 3 shows the treatment effects of the treated fabrics.

Third: In the surface-treated fabric, one side of the fabric facing the rod-shaped electrode had a deep color effect, and only the fiber surface on that side was textured. The unevenness is 0.0 when it is kept in plasma for 10 seconds.
It is 1μ or less, so there is little decrease in reflectance, and although the color depth effect is produced, it is extremely low. However, when the color is allowed to stay for 20 seconds, the color depth is fully recognized while the gloss is completely preserved.

The depth of the color is even more noticeable when it stays for 30 seconds,
The gloss is slightly reduced and a matte effect appears. The density of the formed irregularities was about 30 per square micron on average.

%W [Applicant: Rishi Co., Ltd. Representative Patent Attorney Ken Honda

Claims (1)

[Claims] After the surface of at least the portion of each fiber located on at least one side of the fiber molded article made of organic synthetic fibers that appears on the outer surface of the molded tissue is irradiated with glow discharge plasma, the depth or height is 0. A fiber molded article characterized by having irregularities larger than 0.01 micron and less than 0.1 micron at a density of 10 to 200 pieces per square micron.