JPH06128807A - Fluorescent color-developable pigment fiber and its production - Google Patents

Abstract

PURPOSE:To provide a pigmented fibers useful in the field needing fluorescent color(s) with high decorativeness such as interior decoration, consisting of conjugate fibers with the single fiber made up of a thermoplastic resin incorporated with a specified amount of a pigment and a thermoplastic resin incorporated with special metallic compound(s) emitting fluorescent color(s) under ultraviolet light irradiation. CONSTITUTION:The pigmented fibers consisting of conjugate fibers with the single fiber made up of (A) as core, a thermoplastic resin (e.g. polypropylene) containing 0.5-20wt.% of at least one kind of special metallic compound selected from compounds of formula I, formula II and formula III, emitting blue, green, and red fluorescent colors, respectively, under ultraviolet light irradiation and (B) as sheath, a thermoplastic resin free from the above metallic compounds, but incorporated with 0.01-2.0wt.% of a pigment (e.g. cyanine-based blue). The pigmented fibers can be obtained by conjugate spinning at the core/sheath ratio of (1:1) at a core extruder temperature of 190-200 deg.C and a sheath extruder temperature of 210-230 deg.C followed by drawing. The pigmented fibers of the present invention give excellent fluorescent color(s) and can widely be used in the fields needing fluorescent colors with high decorativeness such as interior decoration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a primary dyed fiber exhibiting an excellent fluorescent color, which is widely used in a field requiring highly decorative fluorescent color such as interior decoration, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as a method of emitting a fluorescent color,
It is generally known that a fluorescent agent that develops color under UV illumination such as black light, a method of blending it into a paint and fixing it to a substrate, or a method of directly blending a fluorescent agent into plastics etc. Has been.

On the other hand, even for textile products such as carpets and wall materials (cloth) for interior decoration, there is a strong demand for a material that emits a bright fluorescent color under black light. Kaisho 60-81315
Japanese Unexamined Patent Publication No. 60-199942 and Japanese Unexamined Patent Publication No. 60-199942 disclose core-sheath fluorescent conjugate fibers composed of a component containing a fluorescent agent and a component not containing the fluorescent agent. This core-sheath fluorescent composite fiber is irradiated with radiation, X-rays, ultraviolet rays, visible light, etc., and even after the irradiation light is blocked, light rays that are visible to humans in the dark for a few seconds to several tens of minutes. It is a so-called phosphorescent fiber that emits light, and uses a metal compound such as zinc sulfide and zinc cadmium monosulfide as a fluorescent agent. However, the light emitted by this phosphorescent fiber is pale green, which is inferior in vividness and has low brightness.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and is a fiber which emits a bright fluorescent color under black light in response to the market demand, and is not under black light as high-grade fibers. The present invention provides a fiber, which is usually a priming fiber, and a manufacturing method thereof.

[0005]

According to the present invention, at least one of the special metal compounds represented by the following formulas (1), (2) and (3), which emits a fluorescent color under irradiation of ultraviolet rays, is added in an amount of 0.5 to 0.5.
The gist is a fluorescent coloring primary dyed fiber containing a thermoplastic resin as a component, which contains 20% by weight and 0.01 to 2.0% by weight of a pigment. [Sr ₅ (PO ₂ ) ₃ Cl: Eu] (1) [Zn ₂ GeO ₂ : Mn] (2) [Y ₂ O ₂ S: Eu] (3)

The metal compound represented by the above formula used in the present invention is a special metal compound which emits a fluorescent color of a specific wavelength upon irradiation with ultraviolet rays, and is represented by the formula (1) [Sr ₅ (PO ₂ ) ₃ Cl: Eu] develops blue, [Zn ₂ GeO ₂ : Mn] of the formula (2) is green,
[Y ₂ O ₂ S: Eu] of the formula (3) develops red.

This metal compound has far higher fastness such as heat resistance, solvent resistance, light resistance, acid resistance and alkali resistance than fluorescent dyes and organic fluorescent pigments.

Further, since the metal compounds of the above formulas (1), (2) and (3) develop the three primary colors of light, the fluorescent color emitted can be freely selected by appropriately selecting the combination of the three metal compounds. It is possible to choose.

The particle size of the metal compound used in the present invention is 2
It is preferably 0 micron or less. The larger the particle size of the metal compound, the better the color development performance (higher brightness), but kneading the metal compound having a large particle size into the fiber causes deterioration of spinnability and drawability, and the particle size is 20 μm. When it is larger than the above range, the spinnability is lowered and yarn breakage occurs during drawing.

The content of the metal compound used in the present invention is
It is preferable to add 0.5 to 20% by weight to the whole fiber, and more preferably 1 to 5% by weight to the whole fiber. With respect to the total amount of fiber,
If it is 0.5% by weight or less, the color developability is poor, and if it is 20% by weight or more, the spinnability is lowered and the yarn breaks during stretching.

The thermoplastic resin constituting the fluorescent coloring primary dye fiber of the present invention can be used as long as its melting point is below the alteration or decomposition temperature of the metal compound used, and fibers such as polyamide, polyester, and polyolefin can be used. From the viewpoint of the thermal stability of the metal compound for which the forming resin can be used, polypropylene having a low temperature during melt spinning is a preferable fiber forming resin.

The fiber form of the fluorescent coloring primary dye fiber of the present invention may be a single yarn or a side-by-side composite yarn, and the fiber cross section may be circular, hollow or triangular or the like. good. Further, as the fiber form, so-called raw yarn may be used or crimped yarn obtained by post-processing such as simultaneous air processing and false twisting processing.

When the fiber form is a side-by-side composite yarn, it is preferable to set the composite ratio and manufacturing conditions so that the component containing the metal compound is 40 to 60% of the fiber cross-sectional area. If the content of the component containing the metal compound exceeds 60%, the feel of the fiber will deteriorate, and if it is 40% or less, the color developability will decrease.

In the core-sheath type composite yarn, a component mixed with a metal compound is used on the core component side, and the composite ratio and manufacturing conditions are set so that the component accounts for 30 to 70% of the fiber cross-sectional area. It is preferable. If the ratio of the components containing the metal compound exceeds 70%, the spinnability is lowered and the yarn breakage during drawing is increased. On the other hand, if it is 30% or less, the color developability deteriorates.
A single-core type or a multi-core type may be used as long as the component containing the metal compound is in the range of 30 to 70%.

The fluorescent dye-forming fiber of the present invention may be deposited by a method of directly adding a pigment or a masterbatch method, and the addition amount is 0.01 to 2. A content of 0% by weight is preferable. As the pigment to be used, those generally used for undiluted solution of synthetic fiber can be used, and as the original coloring, a color different from the fluorescent color of the metal compound is preferable.

The melt-spun fiber has a draw ratio of 1.5 to
Stretch in the range of 6.5 times. If the draw ratio is less than 15, the fiber strength will be lowered, and if it exceeds 6.5, whitening will occur and the dyeing will be carried out, and the coloring property of the fluorescent agent will be deteriorated.

The fluorescent coloring primary dye fiber of the present invention has a wavelength of 36.
Upon receiving an ultraviolet ray of 5 to 254 nm, the color of the spun yarn changes to a fluorescent color unique to each of the compounded metal compounds. This coloring phenomenon develops instantly after the irradiation of ultraviolet rays, and when the irradiation is stopped, it immediately returns to the original color of the dyed yarn.

[0018]

EXAMPLES The present invention will be specifically described below with reference to examples. Melt index in Examples (hereinafter abbreviated as MI)
The value is a value measured at 230 ° C. according to JIS K7210.

[Example 1] A polypropylene having an MI value of 30/10 min was used, and a core containing 3% by weight of a metal compound represented by the formula (1) (manufactured by Dainichiseika Kogyo KK) and a metal compound were contained. Without, the composite fiber containing 0.35% by weight of cyanine-based blue (manufactured by Dainichiseika Kogyo Co., Ltd.) as a light blue primary pigment, and having a core-sheath ratio of 1/1 in a sheath part, a core part extruder temperature of 190 ~ 200 ℃ and sheath extruder temperature 2
Spinning was carried out at 10 to 230 ° C., and simultaneous drawing air processing was carried out at a draw ratio of 3.95 to obtain 800 d / 36 f fluorescent coloring primary dyed fibers. At this time, the spinning stability was good, and when the obtained fiber was a light blue dyed yarn, it was changed to blue when irradiated with ultraviolet rays under a black light, and showed good color development.

[Example 2] The metal compound was changed from the formula (1) to (2), and the pigment was changed from light blue to pink and polyazo dye yellow red (manufactured by Dainippon Ink and Chemicals, Inc.) was contained. Spinning and simultaneous drawing air processing were performed in the same manner as in Example 1 except that the ratio was 0.03% by weight to obtain 800 d / 36f fluorescent chromogenic primary dyed fiber. This fiber changed from pink to green and showed good color development.

[Example 3] The content of cyanine green (manufactured by Dainippon Ink and Chemicals, Inc.) in which the metal compound was changed from the formula (1) to (3) and the pigment was changed from light blue to light green. Spinning and simultaneous drawing air processing were performed in the same manner as in Example 1 except that the content was changed to 0.3% by weight to obtain an 800 d / 36 f fluorescent coloring primary dyed fiber. This fiber changed from light green to red and showed good color development.

Example 4 Spinning was carried out in the same manner as in Example 1 except that the metal compound of the formula (3) and the light-pigmented pigment light green were arranged in the core part and in the sheath part containing no metal compound and pigment. Stretching air processing was performed to obtain a fluorescent coloring primary dyed fiber of 800 d / 36 f. The light green of the spun-dyed yarn of this fiber was slightly inferior to that of Example 3, but showed the same coloring property.

[Comparative Example 1] The content of the metal compound was 0.1.
Spinning and simultaneous drawing air processing were carried out under the same conditions as in Examples 1, 2 and 3 except that the weight percentage was changed to obtain 800d / 36f fluorescent coloring primary dyed fiber. This fiber was inferior in color forming property to each example.

[Comparative Example 2] Except that the core-sheath ratio is 2/1,
Spinning and simultaneous drawing air processing were performed under the same conditions as in Examples 1, 2 and 3 to obtain 800 d / 36f fluorescent coloring primary dyed fibers. This fiber was better in color developability than the examples, but the color of the original dye was inferior and it could not be said to be the original dye yarn.

[0025]

The fiber of the present invention is a fiber that emits various bright fluorescent colors under black light, which is impossible with conventional fibers, and is a dichroic fiber that becomes a spun yarn when black light is turned off. is there. Corresponding to the trend of fashion in recent years, it is widely used in fields requiring highly decorative fluorescent colors such as interior decoration.

Claims (8)

[Claims] 1. A moistened fiber obtained by kneading a pigment in an amount of 0.01 to 2.0% by weight based on the following formula (1):
0.5 or more of at least one special metal compound that emits a fluorescent color under ultraviolet irradiation consisting of (2) and (3) is added to the fiber.
A fluorescent coloring primary dyed fiber containing a thermoplastic resin contained in an amount of up to 20% by weight. [Sr ₅ (PO ₂ ) ₃ Cl: Eu] (1) [Zn ₂ GeO ₂ : Mn] (2) [Y ₂ O ₂ S: Eu] (3) 2. A thermoplastic resin containing at least 0.5 to 20% by weight of at least one special metal compound of formulas (1), (2) and (3) which emits a fluorescent color under irradiation of ultraviolet rays. The fluorescent coloring primary dyed fiber according to claim 1, wherein a thermoplastic resin containing a pigment which does not contain the metal compound is arranged in a core portion, and a thermoplastic resin in a sheath portion. 3. The formulas (1), (2) according to claim 1,
(3) A thermoplastic resin containing 0.5 to 20% by weight of at least one special metal compound that emits a fluorescent color under irradiation of ultraviolet rays and a pigment, and a core containing the metal compound and the pigment. The fluorescent coloring primary dyed fiber according to claim 1, wherein a thermoplastic resin which is not used is disposed in a sheath portion. 4. The fluorescent coloring primary dyed fiber according to claim 1, 2 or 3, wherein the thermoplastic resin used is polypropylene. 5. 0.5 to 20% by weight of at least one special metal compound of the following formulas (1), (2) and (3) which emits a fluorescent color under irradiation of ultraviolet rays and a pigment of 0.01. ~ 2.0
The method for producing a fluorescent coloring primary dyed fiber according to claim 1, characterized in that the thermoplastic resin containing wt% is melt-spun. [Sr ₅ (PO ₂ ) ₃ Cl: Eu] (1) [Zn ₂ GeO ₂ : Mn] (2) [Y ₂ O ₂ S: Eu] (3) 6. A thermoplastic resin containing 0.5 to 20% by weight of at least one special metal compound of formulas (1), (2) and (3) which emits a fluorescent color under irradiation of ultraviolet rays. The method for producing a fluorescent chromogenic fiber according to claim 2, wherein the core part is melt-composite-spun with a thermoplastic resin containing a pigment not containing the metal compound as a sheath part. 7. A heat containing 0.5 to 20% by weight of at least one of the special metal compounds of the formulas (1), (2) and (3) which emits a fluorescent color under irradiation of ultraviolet rays and a pigment. 4. The method for producing a fluorescent chromogenic fiber according to claim 3, wherein melt-composite spinning is performed with a thermoplastic resin as a core and a thermoplastic resin not containing the metal compound and the pigment as a sheath. 8. A draw ratio of 1.5 to 6 after melt spinning.
The method for producing a fluorescent coloring primary dyed fiber according to claim 6 or 7, wherein a drawn yarn that is drawn in a range of 5 times or a drawn yarn is simultaneously subjected to a draw air processing treatment to obtain a crimped yarn.