JPH01111007A - photochromic fiber - Google Patents

Abstract

PURPOSE:To obtain the above fiber, containing a photochromic substance, capable of providing chameleon ware having a color change repeatedly enjoyable by utilizing a temporary color tone change of coloring by light and decoloring by cutting off the light and utilizable also as optical shutters. CONSTITUTION:The aimed fiber containing a photochromic substance {e.g., BaTiO2, SrTiO3, PbTiO3 or oxazine [1-(p-methylbenzyl)-3,3,4,6-tetra methylspiro[indolino-2,3'- (9'-methoxynaphtho)[2,1-b](1,4)-oxazine]}. Furthermore, the above-mentioned fiber is dyed with the photochromic substance.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to photochromic fibers.

[Conventional technology]

The conventional 70% discount film or photofremic laminate is disclosed in Japanese Patent Publication No. 58-10756 and Japanese Unexamined Patent Application Publication No. 1987-10756.
118478, the organic photochromic substance was mixed into a polymer resin and a photochromic glass powder layer was laminated.

[Problem that the invention seeks to solve]

However, the prior art laminated layers of photochromic glass powder have low optical density, and organic photochromic materials have problems in durability. Its purpose is to
The purpose of this invention is to provide photochromic fibers with high optical density, excellent durability, and relatively fast photocoloring and fading speeds, thereby expanding their use.

[Means for solving problems]

The photochromic fiber of the present invention contains a photochromic substance in the fiber, develops color when exposed to light, and returns to its original state when light is blocked.

〔Example〕

The present invention will be described in detail below. The photochromic substances used in the present invention include inorganic photochromic substances such as metal oxides, gold tetrahalides, and metal carbonyls;
Thioindigos, aromatic nitro compounds, anils, spiropyrans, triphenylmethane dyes, leuco compounds, imidazoles.

Example-1 in which organic photochromic substances such as hydrazines, chlorophyllum, and polynuclear aromatic compounds can be used Cellulose is used as the spinning stock solution, and the solution is separately used in a ball mill for 1 day and night in a sand mill, and a surfactant is applied to the surface. Aggregation-prevented 8rTiO,/N1-Mo dope powder (approximately ct5μ) was added to form rayon fibers. The fiber of this example changes from white to blackish purple by irradiating it with ultraviolet rays (high pressure mercury lamp 80W/, 11031 mm)
Ten minutes after the irradiation was stopped, the fibers returned to their original state (white fibers).

As an inorganic photochromic substance, BaTiO35S
r T i OS e P b T 103 #
7e, Zn are added as dopants to these materials.
, V, 3b.

Mo, Ni, W, (gold & tetraoxide containing lo,
Or a composite is used. When irradiated with ultraviolet rays, it absorbs in the visible light range, so by selecting a material, you can create fibers with the desired color. Chameleon fiber can be used for sportswear, light speed lace curtains, building exterior wall materials, etc. In addition, in combination with an ultraviolet light emitting source, it can be used as an interior product.By partially using it, a pattern can be created and the decorativeness can be improved.

Example 2 Ethyl benzoate was used as a carrier for a commercially available lace curtain (100% acrylic fiber), and oxazine [1-(P-methylbenzyl)] was used as a photochromic dye.
-5,3,4,6-titramethylspiro [indolino-
2,3'-(9'-methoxynaphtho)(2,1-1
)(1,4)-oxazine] was dyed in a dye solution containing ethylene glycol, water and xylene in a pressure cooker at 90°C for one day and night, washed with warm water, and used indoors as a lace curtain. When exposed to direct sunlight through the exterior window glass, it turned a crystal blue color. Areas exposed to strong sunlight were highly colored, while shaded areas were white, and the coloring changed over time.

Example 3 In exactly the same manner as in Example 2, a commercially available white swimsuit made of acrylic and cotton blend was obtained and dyed in the same manner as above. Like the lace curtains, it was colored blue under sunlight.

Example 4 Using the same acrylic fibers as in Example 2, the surface of the cloth was further treated with a water repellent treatment agent to produce pure white ski wear. On the slopes in good weather, the color was bright blue, while indoors, she wore white clothing, and the changes were extremely playful.

Example 5 A shirt was manufactured by dyeing a cotton fabric with the dithizone photochromic compound represented by the above formula (1). After dyeing, the dye was fixed in a drying oven at 95°C, and the pale yellow shirt turned red under sunlight. By applying heat transfer using an iron or the like, letters and figures can be made to appear.

〔Effect of the invention〕

It is a technology with high industrial value that utilizes temporary color tone changes to create chameleon wear that allows you to enjoy color changes on its axis, provides daily necessities with improved durability and decorative properties, and can also be used as a light shutter. .

Claims (2)

[Claims] (1) A photochromic fiber containing a photochromic substance, which develops color when exposed to light and disappears when light is blocked. (2) The photochromic fiber according to claim 1, wherein the photochromic fiber is a fiber dyed with a photochromic substance.