JPH062265A - Device for modifying surface of yarn - Google Patents

Abstract

PURPOSE:To darken woven fabric and to improve handle by irradiating the surface of woven fabric with laser beam in an ultraviolet light or infrared light region. CONSTITUTION:Woven fabric of polyester yarn is irradiated with laser beam in an ultraviolet light or infrared light region having an absorption wavelength of the polyester yarn in such a way that the irradiation area is intermittent or makes a given pattern shape or the woven fabric is impregnated with a modifying agent such as resin agent, metal oxide or metal powder and irradiated with the laser beam to provide a deep color tone and to improve handle. Effects of battic are expected by raising energy density of light irradiation and making only the irradiated part undyeable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for changing the surface of a woven fabric to give a bathochromic effect after dyeing or an improvement in texture or a decolorizing effect.

[0002]

2. Description of the Related Art Recently, a texture has been created by a device that forms a vacuum environment and emits plasma near the woven fabric surface at a low temperature, or a device that changes the woven fabric surface by passing an oxygen or carbon dioxide atmosphere for a certain period of time. There is. However, all of these devices are required to create a special environment and a special atmosphere, and are very expensive as devices. Moreover, it is also a complicated device for maintaining those atmospheres.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been studied to solve the above-mentioned problems, and further provides a texture of a woven fabric which cannot be obtained by a conventional apparatus.

[0004]

The present invention selects at least a light source having an absorption wavelength in a woven material and irradiates the light source on the woven fabric surface with a predetermined output for a predetermined time. The bathochromic effect is recognized.

Further, by irradiating the fabric surface with light having a higher output or for a longer period of time than the above conditions, the phenomenon that the fabric surface is dissolved or the intermolecular bond of the woven material is selectively cut. As a result, a surface modification phenomenon occurs, and only that part is not dyed and remains the color of the material. It can be said that this is a development of conventional wax dyeing.

[0006]

The present invention will be described below with reference to examples. The device according to the invention is constructed as shown in FIG. That is, the light emitted or emitted from the laser oscillator or the flash lamp, which is the light source, is applied to the surface of the polyester woven fabric through the light control device that functions to illuminate the entire surface of the polyester woven fabric in the shortest possible time. The polyester woven fabric is configured to move intermittently or continuously in synchronism with the irradiation area of light.
The polyester woven fabric has an absorption wavelength in the wavelength range of 300 nm or less in the ultraviolet wavelength range and has an infrared wavelength of 5.
It is clear that there is an absorption wavelength around 8 microns or 9.8 microns, etc., as compared with the measurement by the spectrophotometer, but in this example, when the excimer laser in the ultraviolet region was used, about 1 By irradiating the surface of the polyester fabric with an energy density of 50 millijoules, a bathochromic effect that is at least equal to or higher than that of the conventional apparatus was found. It can be seen that the surface modification phenomenon occurs due to the selective cleavage of the bonds between the molecules constituting the polyester, which is the woven material, as is apparent from the micrograph in the figure.

As another embodiment, in the structure shown in FIG. 1, the emitted laser light is condensed by a lens to increase the energy density from several times to several tens of times, and the polyester woven fabric surface is at least once at the same place. When irradiated, the surface of the fabric is different from the form in which only the weak intermolecular bond is cleaved as in the above-mentioned embodiment, and the strong intermolecular bond is also cleaved by multiphoton absorption, as if it was heat-melted. Will be like.

[0008]

As described above, the conventional low temperature plasma device and the special gas permeation can be easily performed by controlling the intensity of light or the number of times of irradiation of light without requiring a vacuum environment or a special gas environment. It is possible to provide, as an inexpensive device, a woven fabric having the same or better bathochromic effect as that of the device, and the developed texture of the wax dyeing, which was impossible with the conventional device.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a fabric surface modification device.

FIG. 2 shows a micrograph of a polyester fiber surface after irradiating a polyester fabric with an excimer laser.

FIG. 3 shows a micrograph of a polyester fabric before light irradiation.

[Explanation of symbols]

 1 light source 2 fabric 3 fabric winding device

Claims (6)

[Claims] 1. A device which improves the deep color or texture of a woven fabric by irradiating the fabric surface with a laser beam in the ultraviolet or infrared region to change the surface structure. 2. By irradiating the surface of a textile material having an absorption wavelength with light in the ultraviolet region or the infrared region, the physical form of the fabric surface is changed according to the wavelength of the light to be irradiated to improve the texture after dyeing. The device according to claim 1, wherein 3. The apparatus according to claim 1, wherein the portion is not dyed after dyeing by increasing the energy density of light. 4. The method according to claim 1, wherein the light irradiation is performed intermittently or through a mask having a shape pattern to improve the texture of the woven fabric after dyeing by combining the irradiated portion and the non-irradiated portion. apparatus. 5. The texture of a fabric is improved by impregnating the fabric with a fiber modifier such as a resin agent in advance and irradiating the surface of the fabric material having an absorption wavelength with light in the ultraviolet region or infrared region. 1. The device according to 1. 6. A woven fabric is preliminarily impregnated with a fiber modifier such as a metal oxide or a fine powder of metal, and the light in the ultraviolet region or the infrared region is irradiated to the surface of the woven fabric material having an absorption wavelength. The device of claim 1 for improving texture.