CN109137129B - High-light-transmittance and adjustable-refractive-index polyester fiber prepared by organic cadmium carboxylate and preparation method thereof - Google Patents

High-light-transmittance and adjustable-refractive-index polyester fiber prepared by organic cadmium carboxylate and preparation method thereof Download PDF

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CN109137129B
CN109137129B CN201810959666.8A CN201810959666A CN109137129B CN 109137129 B CN109137129 B CN 109137129B CN 201810959666 A CN201810959666 A CN 201810959666A CN 109137129 B CN109137129 B CN 109137129B
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王泉泉
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Artificial Filaments (AREA)

Abstract

The invention relates to a polyester fiber with high light transmittance and adjustable refractive index prepared by organic cadmium carboxylate and a preparation method thereof, and the preparation method specifically comprises the following steps: step (1) synthesis of organic cadmium carboxylate, weighing metal cadmium salt or oxide thereof, weighing organic acid, adding a solvent, reacting for a period of time, filtering, cooling, crystallizing and drying after the reaction is finished to obtain organic cadmium carboxylate crystals; preparing polyester slices, namely mixing a polyester raw material with the organic cadmium carboxylate prepared in the step (1), melting, extruding and granulating in a double-screw extruder, and heating to perform solid-phase polymerization under the protection of inert gas; and (3) melt spinning, namely adding the polyester chips prepared in the step (2) into melt spinning equipment for melt spinning to obtain the polyester fiber with high light transmittance and adjustable refractive index, wherein the preparation method of the fiber is simple.

Description

High-light-transmittance and adjustable-refractive-index polyester fiber prepared by organic cadmium carboxylate and preparation method thereof
Technical Field
The invention belongs to the field of textile materials, and particularly relates to a high-light-transmittance and adjustable-refractive-index polyester fiber prepared by using organic cadmium carboxylate and a preparation method thereof.
Background
Polyester fibers (polyester fibers) are synthetic fibers obtained by spinning polyester obtained by polycondensation of organic dibasic acid and dihydric alcohol, wherein the polyester fibers obtained by polymerization of terephthalic acid and ethylene glycol are the most common and are commonly called terylene. The polyester fiber has the advantages of good crease resistance and shape retention, high strength and elasticity recovery capability, fastness, durability, crease resistance, no iron burn and no hair sticking.
The color of the fiber is mainly the feeling of our eyes and brain to light, and the essence is that light irradiates the fiber, and the light emits a series of optical changes such as reflection, refraction, absorption and the like on the fiber, so that our eyes receive electromagnetic waves with different original light wavelengths, and then the brain can feel different colors. In the textile field, the fiber is dyed or printed by a common color development operation, different dyes are endowed to the fiber through dyeing and printing, and the different dyes can absorb specific parts of electromagnetic waves in light and reflect other electromagnetic waves, so that different colors can be seen. In the prior art, there is a research on structural color development, for example, nanostructures are arranged on the surface of a fabric or a fiber at different distances, and the nanostructures are used for generating certain refraction and reflection to incident light and superposition or attenuation between electromagnetic waves, so that the eyes of people can receive the electromagnetic waves with different wavelengths, and people can perceive different colors.
The organic/inorganic hybrid material is a hybrid material containing two or more materials, the materials are composite materials with components at a nanometer or molecular level, and the hybrid materials are mixed at a microscopic scale and are relatively uniform inside, so that the hybrid material shows new characteristics. It has many applications, such as optical applications. In the textile field, there are few fibers prepared from hybrid organic/inorganic materials and used in the optical field.
The prior art has seen applications of fibers or fabrics in optics, but most studies on color development of fabrics have focused on fiber dyeing and finishing processes and surface treatment of fibers or fabrics. The invention aims to prepare a polyester fiber with high light transmittance and adjustable refractive index by using organic cadmium carboxylate, which can increase the light transmittance of the fiber and adjust the refractive index, so that the fiber has a certain application prospect in the aspect of optical performance, such as preparing high-light-transmittance gauze, applying the gauze as an optical fiber in the optical field, and possibly using the change of light transmittance and refraction of the fiber in the future, and hopefully preparing a fabric which develops color without dyeing.
Disclosure of Invention
In order to realize the invention, the invention aims to prepare the polyester fiber with high light transmittance and adjustable refractive index by using organic cadmium carboxylate, and provides a preparation method thereof, which comprises the following steps.
Step (1) Synthesis of cadmium organic carboxylate
Weighing metal cadmium salt or oxide thereof, weighing organic acid, adding a solvent, reacting for a period of time, and after the reaction is finished, filtering, cooling, crystallizing and drying to obtain the organic cadmium carboxylate crystal.
The organic cadmium carboxylate is used as the raw material for preparing the polyester fiber with high light transmittance and adjustable refractive index, and is metal organic carboxylate, the polyester raw material is modified by using the organic carboxylate to obtain an organic/inorganic hybrid material, the organic/inorganic hybrid material is a uniformly dispersed multiphase material, at least one dimension of at least one phase of the organic/inorganic hybrid material is in the order of nanometers, and even reaches the level of molecular recombination, so that the interface area between the organic phase and the inorganic phase is large, the interaction is strong, a clear interface becomes fuzzy, and certain unexpected effects can be generated in the aspect of optics, such as the light transmittance of the material can be improved, the refractive index of the material is changed, and the like.
Further, the metal cadmium salt or the oxide thereof is one or two of cadmium carbonate and cadmium oxide.
Further, the organic acid is a dicarboxylic acid.
Further, the dicarboxylic acid is one or more of oxalic acid, adipic acid, azelaic acid, isophthalic acid and terephthalic acid.
Furthermore, a certain blocking agent is added in the synthesis of the organic cadmium carboxylate.
The purpose of the blocking agent is to avoid the excessive reaction speed of the organic cadmium carboxylate, and at the same time, the blocking agent can avoid the reaction from going to completion, and the blocking agent can be an organic reagent containing hydroxyl. One or more hydroxyl groups on the structure of the organic cadmium carboxylate are ensured, and the condition for modifying the polyester is further provided.
The blocking agent can be one or more of hydroquinone, ethylene glycol and propylene glycol.
The molar ratio of the organic acid to the metal cadmium oxide or the salt thereof is 1.5-4:1, and the use amount of the carboxylic acid is ensured to be larger than that of the metal oxide or the salt thereof, so that the prepared organic cadmium carboxylate product contains enough carboxyl groups and can perform esterification grafting reaction with the polyester. When the content of the carboxylic acid is too high, the carboxylic acid may be precipitated during the crystallization process, participate in the reaction of the polyester, and affect the viscosity of the polyester and the mechanical properties of the final fiber.
The solvent is one of water, ethanol and acetone.
The reaction temperature is 50-70 ℃ and the reaction time is 0.5-1 h.
Step (2) preparation of polyester chips
Mixing and melting a polyester raw material and the organic cadmium carboxylate prepared in the step (1), extruding and granulating in a double-screw extruder, and heating to perform solid-phase polymerization under the protection of inert gas.
The polyester raw material and the organic cadmium carboxylate are mixed before granulation, so that the dispersion of the organic cadmium carboxylate in a polyester system can be improved, and the subsequent solid polymerization reaction can be fully and uniformly carried out after granulation. The pre-crystallization is carried out before the solidification polymerization reaction, so that the polyester material can be fully crystallized, the subsequent solidification reaction is facilitated, and the viscosity of the polyester can be ensured not to be greatly changed.
In the solid phase polymerization, the organic cadmium carboxylate contains an organic structure part and a hydroxyl or carboxyl, so that the organic cadmium carboxylate can be subjected to polymerization reaction with the hydroxyl or carboxyl on the polyester under a high-temperature condition and then grafted to polyester macromolecules to obtain an organic/inorganic hybrid material, the light transmittance of the polyester material is improved, the refractive index of the fiber is adjusted, and the refractive index of the fiber is mainly realized by controlling the dosage ratio of the organic cadmium carboxylate to the polyester material.
The reaction condition of the solid phase polymerization is 210-245 ℃, and the reaction time is 2-5 h.
According to the invention, solid-phase polymerization is selected to graft the organic cadmium carboxylate onto the polyester macromolecular chain, so that the problem of infirm bonding caused by coating treatment is avoided, the problems of difficulty in controlling the process and difficulty in controlling the polymerization degree during liquid-state polymerization are also avoided, and the viscosity and the thermal transition temperature of the prepared polyester chip are not greatly changed.
The mass ratio of the polyester raw material to the organic carboxylate is 95-99: 1-5
Step (3) melt spinning
And (3) adding the polyester chips prepared in the step (2) into melt spinning equipment for melt spinning to obtain the polyester fiber with high light transmittance and adjustable refractive index.
The invention also provides a polyester fiber with high light transmittance and adjustable refractive index prepared by using the organic cadmium carboxylate.
Specifically, the light transmittance of the fiber is larger than 90%, and the refractive index is adjustable within the range of 1.2-1.5.
The high-transmittance and adjustable-refractive-index polyester fiber prepared by the invention has good light transmittance, can adjust the refractive index according to requirements, meets the requirements on optical performance, and has a simple preparation method.
Detailed Description
To further illustrate the invention, the invention provides the following series of examples:
example 1
The preparation method of the high-transmittance and adjustable-refractive-index polyester fiber by using the organic cadmium carboxylate specifically comprises the following steps.
Step (1) Synthesis of cadmium organic carboxylate
Weighing cadmium oxide and oxalic acid, wherein the molar ratio of the cadmium oxide to the oxalic acid is 1:2, adding a proper amount of water, adding a certain amount of hydroquinone as a blocking agent, reacting for 1h at 50 ℃, and after the reaction is finished, filtering, cooling, crystallizing and drying to obtain the organic cadmium carboxylate crystal.
Step (2) preparation of polyester chips
Mixing a polyester raw material with the organic cadmium carboxylate prepared in the step (1), wherein the mass ratio of the polyester raw material to the organic cadmium carboxylate is 98:2, melting, extruding and granulating in a double-screw extruder, and carrying out N2Under the atmosphere, the temperature is raised to 190 ℃, the pre-crystallization is carried out for 30min, then the temperature is raised to 225 ℃, and the solid-phase polymerization is carried out, wherein the polymerization time is 4 h.
Step (3) melt spinning
And (3) adding the polyester chips prepared in the step (2) into melt spinning equipment for melt spinning to obtain the polyester fiber with high light transmittance and adjustable refractive index.
Example 2
The preparation method of the high-transmittance and adjustable-refractive-index polyester fiber by using the organic cadmium carboxylate specifically comprises the following steps.
Step (1) Synthesis of cadmium organic carboxylate
Weighing cadmium carbonate and oxalic acid, wherein the molar ratio of the cadmium carbonate to the oxalic acid is 1:2, adding a proper amount of water, adding a certain amount of ethylene glycol as a blocking agent, reacting for 1h at 50 ℃, and after the reaction is finished, filtering, cooling, crystallizing and drying to obtain the organic cadmium carboxylate crystal.
Step (2) preparation of polyester chips
Mixing a polyester raw material with the organic cadmium carboxylate prepared in the step (1), wherein the mass ratio of the polyester raw material to the organic cadmium carboxylate is 98:2, melting, extruding and granulating in a double-screw extruder, and carrying out N2Under the atmosphere, the temperature is raised to 190 ℃, the pre-crystallization is carried out for 30min, then the temperature is raised to 225 ℃, and the solid-phase polymerization is carried out, wherein the polymerization time is 4 h.
Step (3) melt spinning
And (3) adding the polyester chips prepared in the step (2) into melt spinning equipment for melt spinning to obtain the polyester fiber with high light transmittance and adjustable refractive index.
Example 3
The preparation method of the high-transmittance and adjustable-refractive-index polyester fiber by using the organic cadmium carboxylate specifically comprises the following steps.
Step (1) Synthesis of cadmium organic carboxylate
Weighing cadmium oxide and oxalic acid, wherein the molar ratio of the cadmium oxide to the oxalic acid is 1:3, adding a proper amount of water, adding a certain amount of hydroquinone as a blocking agent, reacting for 1h at 50 ℃, and after the reaction is finished, filtering, cooling, crystallizing and drying to obtain the organic cadmium carboxylate crystal.
Step (2) preparation of polyester chips
Mixing a polyester raw material with the organic cadmium carboxylate prepared in the step (1), wherein the mass ratio of the polyester raw material to the organic cadmium carboxylate is 98:2, melting, extruding and granulating in a double-screw extruder, and carrying out N2Under the atmosphere, the temperature is raised to 190 ℃, the pre-crystallization is carried out for 30min, then the temperature is raised to 225 ℃, and the solid-phase polymerization is carried out, wherein the polymerization time is 4 h.
Step (3) melt spinning
And (3) adding the polyester chips prepared in the step (2) into melt spinning equipment for melt spinning to obtain the polyester fiber with high light transmittance and adjustable refractive index.
Example 4
The preparation method of the high-transmittance and adjustable-refractive-index polyester fiber by using the organic cadmium carboxylate specifically comprises the following steps.
Step (1) Synthesis of cadmium organic carboxylate
Weighing cadmium oxide and oxalic acid, wherein the molar ratio of the cadmium oxide to the oxalic acid is 1:2, adding a proper amount of water, adding a certain amount of hydroquinone as a blocking agent, reacting for 1h at 50 ℃, and after the reaction is finished, filtering, cooling, crystallizing and drying to obtain the organic cadmium carboxylate crystal.
Step (2) preparation of polyester chips
The polyester raw material and the polyester prepared in the step (1) areMixing organic cadmium carboxylate with the mass ratio of polyester raw material to organic cadmium carboxylate being 98:2, melting, extruding and granulating in a double-screw extruder, and adding N2Raising the temperature to 180 ℃ in the atmosphere, pre-crystallizing for 40min, then raising the temperature to 230 ℃ and carrying out solid-phase polymerization for 5 h.
Step (3) melt spinning
And (3) adding the polyester chips prepared in the step (2) into melt spinning equipment for melt spinning to obtain the polyester fiber with high light transmittance and adjustable refractive index.
Example 5
The preparation method of the high-transmittance and adjustable-refractive-index polyester fiber by using the organic cadmium carboxylate specifically comprises the following steps.
Step (1) Synthesis of cadmium organic carboxylate
Weighing cadmium oxide and oxalic acid, wherein the molar ratio of the cadmium oxide to the oxalic acid is 1:2, adding a proper amount of water, adding a certain amount of hydroquinone as a blocking agent, reacting for 1h at 50 ℃, and after the reaction is finished, filtering, cooling, crystallizing and drying to obtain the organic cadmium carboxylate crystal.
Step (2) preparation of polyester chips
Mixing a polyester raw material with the organic cadmium carboxylate prepared in the step (1), wherein the mass ratio of the polyester raw material to the organic cadmium carboxylate is 95:5, melting, extruding and granulating in a double-screw extruder, and carrying out N2Under the atmosphere, the temperature is raised to 190 ℃, the pre-crystallization is carried out for 30min, then the temperature is raised to 225 ℃, and the solid-phase polymerization is carried out, wherein the polymerization time is 4 h.
Step (3) melt spinning
And (3) adding the polyester chips prepared in the step (2) into melt spinning equipment for melt spinning to obtain the polyester fiber with high light transmittance and adjustable refractive index.
Example 6
The preparation method of the high-transmittance and adjustable-refractive-index polyester fiber by using the organic cadmium carboxylate specifically comprises the following steps.
Step (1) Synthesis of cadmium organic carboxylate
Weighing cadmium oxide and oxalic acid, wherein the molar ratio of the cadmium oxide to the oxalic acid is 1:2, adding a proper amount of water, adding a certain amount of hydroquinone as a blocking agent, reacting for 1h at 60 ℃, and after the reaction is finished, filtering, cooling, crystallizing and drying to obtain the organic cadmium carboxylate crystal.
Step (2) preparation of polyester chips
Mixing a polyester raw material with the organic cadmium carboxylate prepared in the step (1), wherein the mass ratio of the polyester raw material to the organic cadmium carboxylate is 99:1, melting, extruding and granulating in a double-screw extruder, and carrying out N2Under the atmosphere, the temperature is raised to 190 ℃, the pre-crystallization is carried out for 30min, then the temperature is raised to 225 ℃, and the solid-phase polymerization is carried out, wherein the polymerization time is 4 h.
Step (3) melt spinning
And (3) adding the polyester chips prepared in the step (2) into melt spinning equipment for melt spinning to obtain the polyester fiber with high light transmittance and adjustable refractive index.
Comparative example 1
A method for preparing polyester fiber.
Step (1) preparation of polyester chips
Melting polyester raw materials, extruding and granulating in a double-screw extruder, and adding N2Raising the temperature to 190 ℃ in the atmosphere, and pre-crystallizing for 30 min.
Step (2) melt spinning
And (2) adding the polyester chip prepared in the step (1) into melt spinning equipment, and carrying out melt spinning to obtain the polyester fiber.
Comparative example 2
The preparation method of the polyester fiber with high light transmittance and adjustable refractive index by using the organic copper carboxylate concretely comprises the following steps.
Step (1) Synthesis of copper salt of organic Carboxylic acid
Weighing copper oxide and oxalic acid, wherein the molar ratio of the copper oxide to the oxalic acid is 1:2, adding a proper amount of water, reacting for 1h at 50 ℃, filtering, cooling, crystallizing and drying after the reaction is finished, thereby obtaining the organic copper carboxylate crystal.
Step (2) preparation of polyester chips
Carrying out the preparation of polyester raw material and the organic copper carboxylate salt prepared in the step (1)Mixing, melting polyester raw material and organic copper carboxylate salt in a mass ratio of 98:2, extruding and granulating in a double-screw extruder, and adding N2Under the atmosphere, the temperature is raised to 190 ℃, the pre-crystallization is carried out for 30min, then the temperature is raised to 225 ℃, and the solid-phase polymerization is carried out, wherein the polymerization time is 4 h.
Step (3) melt spinning
And (3) adding the polyester chip prepared in the step (2) into melt spinning equipment, and carrying out melt spinning to obtain the polyester fiber.
Comparative example 3
The preparation method of the high-transmittance and adjustable-refractive-index polyester fiber by using the organic cadmium carboxylate specifically comprises the following steps.
Step (1) Synthesis of cadmium organic carboxylate
Weighing cadmium oxide and oxalic acid, wherein the molar ratio of the cadmium oxide to the oxalic acid is 1:1, adding a proper amount of water, adding a certain amount of hydroquinone as a blocking agent, reacting for 1h at 50 ℃, and after the reaction is finished, filtering, cooling, crystallizing and drying to obtain the organic cadmium carboxylate crystal.
Step (2) preparation of polyester chips
Mixing a polyester raw material with the organic cadmium carboxylate prepared in the step (1), wherein the mass ratio of the polyester raw material to the organic cadmium carboxylate is 98:2, melting, extruding and granulating in a double-screw extruder, and carrying out N2Under the atmosphere, the temperature is raised to 190 ℃, the pre-crystallization is carried out for 30min, then the temperature is raised to 225 ℃, and the solid-phase polymerization is carried out, wherein the polymerization time is 4 h.
Step (3) melt spinning
And (3) adding the polyester chip prepared in the step (2) into melt spinning equipment, and carrying out melt spinning to obtain the polyester fiber.
Comparative example 4
A preparation method of polyester fiber specifically comprises the following steps.
Step (1) preparation of polyester chips
Mixing polyester raw material and cadmium oxide, wherein the mass ratio of the polyester raw material to organic cadmium carboxylate is 98:2, melting, extruding and granulating in a double-screw extruder, and carrying out N2Raising the temperature to 190 ℃ in an atmosphere for pre-crystallizationAfter 30min, the temperature is raised to 225 ℃ and the heat preservation time is 4 h.
Step (2) melt spinning
And (2) adding the polyester chip prepared in the step (1) into melt spinning equipment for melt spinning to obtain the polyester fiber with high light transmittance and adjustable refractive index.
Since the light transmittance and refractive index of the fibers are difficult to measure, the present invention tests the properties of the spun material, and the resulting chip, and again, one skilled in the art can predict the properties achieved by the final fiber. The spun chips were prepared into films, and the light transmittance and refractive index of the films were measured.
(1) The light transmittance is measured by a light transmittance-haze meter according to GB/T2410-2008.
(2) The refractive index of the material is tested by an Abbe refractometer.
The results of the tests are given in the following table
TABLE 1 film transmittance and refractive index
Figure BDA0001767946160000081
The above examples are only preferred embodiments of the present invention, and it should be noted that, for those skilled in the art, various changes, improvements and modifications can be made without departing from the concept of the present invention, and these changes, improvements and modifications should also be construed as the protection scope of the present invention.

Claims (4)

1. A method for preparing high-transmittance and adjustable-refractive-index polyester fibers by using organic cadmium carboxylate is characterized by comprising the following steps of: the method specifically comprises the following steps:
step (1) Synthesis of cadmium organic carboxylate
Weighing one of cadmium carbonate or cadmium oxide, weighing organic acid, adding a solvent, reacting for a period of time, filtering, cooling, crystallizing and drying after the reaction is finished to obtain organic cadmium carboxylate crystals;
adding a blocking agent in the synthesis of the organic cadmium carboxylate in the step (1), wherein the blocking agent is one or more of hydroquinone, ethylene glycol and propylene glycol;
step (2) preparation of polyester chips
Mixing and melting a polyester raw material and the organic cadmium carboxylate prepared in the step (1), extruding and granulating in a double-screw extruder, and heating to perform solid-phase polymerization under the protection of inert gas;
step (3) melt spinning
Adding the polyester chips prepared in the step (2) into melt spinning equipment for melt spinning to obtain high-light-transmission and adjustable-refractive-index polyester fibers;
the organic acid is dicarboxylic acid, and the dicarboxylic acid is one or more of oxalic acid, adipic acid, azelaic acid, isophthalic acid and terephthalic acid.
2. A method for preparing the polyester fiber with high light transmittance and adjustable refractive index according to claim 1, which is characterized in that: the molar ratio of the organic acid to the cadmium carbonate or the cadmium oxide is 1.5-4: 1.
3. A method for preparing the polyester fiber with high light transmittance and adjustable refractive index according to claim 1, which is characterized in that: the reaction temperature in the step (1) is 50-70 ℃, the reaction time is 0.5-1h, the reaction temperature of the solid state polymerization in the step (2) is 200-235 ℃, and the reaction time is 2-5 h.
4. A fiber obtained by the method for preparing the polyester fiber with high light transmittance and adjustable refractive index according to any one of claims 1 to 3, which is characterized in that: the fibers have a light transmittance of greater than 90% and a refractive index of 1.2 to 1.4.
CN201810959666.8A 2018-08-16 2018-08-16 High-light-transmittance and adjustable-refractive-index polyester fiber prepared by organic cadmium carboxylate and preparation method thereof Active CN109137129B (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1140770A (en) * 1995-07-14 1997-01-22 第一合纤株式会社 Method for manufacturing far infrared-radiating polyester fibers

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1140770A (en) * 1995-07-14 1997-01-22 第一合纤株式会社 Method for manufacturing far infrared-radiating polyester fibers

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