CN109161039B - High-light-transmittance and adjustable-refractive-index polyester film prepared from organic barium carboxylate and preparation method thereof - Google Patents
High-light-transmittance and adjustable-refractive-index polyester film prepared from organic barium carboxylate and preparation method thereof Download PDFInfo
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- CN109161039B CN109161039B CN201810934844.1A CN201810934844A CN109161039B CN 109161039 B CN109161039 B CN 109161039B CN 201810934844 A CN201810934844 A CN 201810934844A CN 109161039 B CN109161039 B CN 109161039B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
Abstract
The invention relates to a high-light-transmission and refractive-index-adjustable polyester film prepared by organic barium carboxylate and a preparation method thereof, and the preparation method specifically comprises the following steps: step (1) synthesizing organic barium carboxylate, namely weighing metal barium 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 organic barium carboxylate crystals; preparing polyester slices, namely mixing a polyester raw material with the organic barium carboxylate prepared in the step (1), adding a stabilizer, melting, extruding and granulating in a double-screw extruder, and heating to perform solid-phase polymerization under the protection of inert gas; and (3) preparing a polyester film, namely adding the polyester chip prepared in the step (2) into a melt extrusion device to prepare the polyester film, so as to obtain the polyester film with high light transmittance and adjustable refractive index.
Description
Technical Field
The invention belongs to the field of textile materials, and particularly relates to a high-light-transmission and adjustable-refractive-index polyester film prepared by organic barium carboxylate and a preparation method thereof.
Background
Polyester pet (polyester) is a polyester obtained by polycondensation of an organic dibasic acid and a dihydric alcohol, and is subjected to melt extrusion and stretching to obtain a film. The polyester film is stable and has good light transmission.
The color of the film is mainly the feeling of our eyes and brains to light, and the essence of the film is that light irradiates the film, and the light emits a series of optical changes such as reflection, refraction, absorption and the like on the film, so that our eyes receive electromagnetic waves with different original light wavelengths, and then the brains can feel different colors. In the textile field, the film is dyed or printed by a common color development operation, different dyes are given to the film 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, the nano structures are arranged on the surface of a fabric or a film at different distances, and the nano structures are used for generating certain refraction and reflection to incident light and superposing or weakening 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 thin films of organic/inorganic hybrid materials prepared and used in the optical field.
The prior art has seen applications of films or fabrics in optics, but most studies on color development of fabrics have focused on film dyeing and finishing processes and surface treatment of films or fabrics. The invention aims to prepare a polyester film with high light transmittance and adjustable refractive index by using organic barium carboxylate, which can increase the light transmittance of the film and adjust the refractive index, so that the film has a certain application prospect in the aspect of optical performance, such as the preparation of high-light-transmittance gauze, the application of the high-light-transmittance gauze as an optical fiber in the optical field, and the change of light transmittance and refraction of the film can be possibly utilized in the future, so that a fabric which is developed without dyeing is hopefully prepared.
Disclosure of Invention
In order to realize the invention, the invention aims to prepare a high-light-transmission and adjustable-refractive-index polyester film prepared by organic barium carboxylate and provides a preparation method thereof, which comprises the following steps.
Step (1) Synthesis of barium salt of organic Carboxylic acid
Weighing metal barium 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 the organic barium carboxylate crystal.
The organic barium carboxylate is a raw material for preparing the polyester film with high light transmittance and adjustable refractive index, is metal organic carboxylate, and is used for modifying the polyester raw material to obtain an organic/inorganic hybrid material, wherein the organic/inorganic hybrid material is a uniformly dispersed multiphase material, at least one dimension of at least one phase is in the order of magnitude of nanometers, even reaching 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 barium salt or the oxide thereof is one or two of barium carbonate and barium 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 oil barium carboxylate.
The purpose of the blocking agent is to avoid the excessive reaction speed of organic barium carboxylate, meanwhile, the blocking agent can avoid the complete reaction, and the blocking agent can be an organic reagent containing hydroxyl. One or more hydroxyl groups are ensured to exist on the structure of the organic barium carboxylate salt, 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 barium 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 barium carboxylate product contains enough carboxyl groups and can perform esterification grafting reaction with polyester. When the content of the carboxylic acid is too high, the organic carboxylic acid is precipitated during the crystallization process, and participates in the reaction of the polyester during the solid-phase polymerization, thereby affecting the viscosity of the polyester and the mechanical properties of the final film.
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 a polyester raw material with the organic barium carboxylate salt prepared in the step (1), adding a stabilizer, melting, 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 barium carboxylate salt are mixed before granulation, so that the dispersion of the organic barium carboxylate salt 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 barium carboxylate contains an organic structure part, and the organic structure part contains hydroxyl or carboxyl, so that the groups can generate polymerization reaction with the hydroxyl or carboxyl on the polyester under the high-temperature condition and then are grafted to polyester macromolecules to obtain the organic/inorganic hybrid material, the light transmittance of the polyester material is improved, the refractive index of the film is adjusted, the refractive index of the film is mainly realized by controlling the dosage ratio of the organic barium carboxylate and the polyester material, and the organic/inorganic hybrid material is influenced by the type and purity of the organic/inorganic hybrid material.
The stabilizer is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester.
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 barium 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 grasping 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 extrusion film making
And (3) adding the polyester chip prepared in the step (2) into a melt extrusion film-making system, and obtaining the high-light-transmittance polyester film through extrusion, stretching, sizing and rolling.
The invention also provides a polyester film with high light transmittance and adjustable refractive index prepared by using the organic barium carboxylate.
Specifically, the light transmittance of the film is more than 90%, and the refractive index range is adjustable between 1.2 and 1.5.
The high-transmittance and adjustable-refractive-index polyester film 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
A polyester film with high light transmittance and adjustable refractive index prepared by organic barium carboxylate salt specifically comprises the following steps.
Step (1) Synthesis of barium salt of organic Carboxylic acid
Weighing barium oxide and oxalic acid, wherein the molar ratio of the barium 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 ℃, filtering, cooling, crystallizing and drying after the reaction is finished to obtain the organic barium carboxylate crystal.
Step (2) preparation of polyester chips
Mixing a polyester raw material with the organic barium carboxylate salt prepared in the step (1), adding a stabilizer, melting the polyester raw material and the organic barium carboxylate salt at a mass ratio of 98:2, extruding and granulating in a double-screw extruder, and performing granulation in 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 extrusion film making
And (3) adding the polyester chip prepared in the step (2) into a melt extrusion film-making system, and obtaining the high-light-transmittance polyester film through extrusion, stretching, sizing and rolling.
Example 2
A polyester film with high light transmittance and adjustable refractive index prepared by organic barium carboxylate salt specifically comprises the following steps.
Step (1) Synthesis of barium salt of organic Carboxylic acid
Weighing barium carbonate and oxalic acid, wherein the molar ratio of the barium 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 ℃, filtering, cooling, crystallizing and drying after the reaction is finished to obtain the organic barium carboxylate crystal.
Step (2) preparation of polyester chips
The polyester raw material is prepared by the step (1)Mixing the obtained organic barium carboxylate, adding a stabilizer, melting the polyester raw material and the organic barium carboxylate with the mass ratio of 98:2, extruding and granulating in a double-screw extruder, and performing N-phase granulation2Under 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 extrusion film making
And (3) adding the polyester chip prepared in the step (2) into a melt extrusion film-making system, and obtaining the high-light-transmittance polyester film through extrusion, stretching, sizing and rolling.
Example 3
A polyester film with high light transmittance and adjustable refractive index prepared by organic barium carboxylate salt specifically comprises the following steps.
Step (1) Synthesis of barium salt of organic Carboxylic acid
Weighing barium oxide and oxalic acid, wherein the molar ratio of the barium 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 ℃, filtering, cooling, crystallizing and drying after the reaction is finished to obtain the organic barium carboxylate crystal.
Step (2) preparation of polyester chips
Mixing a polyester raw material with the organic barium carboxylate salt prepared in the step (1), adding a stabilizer, melting the polyester raw material and the organic barium carboxylate salt at a mass ratio of 98:2, extruding and granulating in a double-screw extruder, and performing granulation in 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 extrusion film making
And (3) adding the polyester chip prepared in the step (2) into a melt extrusion film-making system, and obtaining the high-light-transmittance polyester film through extrusion, stretching, sizing and rolling.
Example 4
A polyester film with high light transmittance and adjustable refractive index prepared by organic barium carboxylate salt specifically comprises the following steps.
Step (1) Synthesis of barium salt of organic Carboxylic acid
Weighing barium oxide and oxalic acid, wherein the molar ratio of the barium 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 ℃, filtering, cooling, crystallizing and drying after the reaction is finished to obtain the organic barium carboxylate crystal.
Step (2) preparation of polyester chips
Mixing a polyester raw material with the organic barium carboxylate salt prepared in the step (1), adding a stabilizer, melting the polyester raw material and the organic barium carboxylate salt at a mass ratio of 98:2, extruding and granulating in a double-screw extruder, and performing granulation in 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 extrusion film making
And (3) adding the polyester chip prepared in the step (2) into a melt extrusion film-making system, and obtaining the high-light-transmittance polyester film through extrusion, stretching, sizing and rolling.
Example 5
A polyester film with high light transmittance and adjustable refractive index prepared by organic barium carboxylate salt specifically comprises the following steps.
Step (1) Synthesis of barium salt of organic Carboxylic acid
Weighing barium oxide and oxalic acid, wherein the molar ratio of the barium 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 ℃, filtering, cooling, crystallizing and drying after the reaction is finished to obtain the organic barium carboxylate crystal.
Step (2) preparation of polyester chips
Mixing a polyester raw material with the organic barium carboxylate salt prepared in the step (1), adding a stabilizer, melting the polyester raw material and the organic barium carboxylate salt at a mass ratio of 95:5, extruding and granulating in a double-screw extruder, and performing granulation in 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 extrusion film making
And (3) adding the polyester chip prepared in the step (2) into a melt extrusion film-making system, and obtaining the high-light-transmittance polyester film through extrusion, stretching, sizing and rolling.
Example 6
A polyester film with high light transmittance and adjustable refractive index prepared by organic barium carboxylate salt specifically comprises the following steps.
Step (1) Synthesis of barium salt of organic Carboxylic acid
Weighing barium oxide and oxalic acid, wherein the molar ratio of the barium 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 ℃, filtering, cooling, crystallizing and drying after the reaction is finished to obtain the organic barium carboxylate crystal.
Step (2) preparation of polyester chips
Mixing a polyester raw material with the organic barium carboxylate salt prepared in the step (1), adding a stabilizer, melting the polyester raw material and the organic barium carboxylate salt at a mass ratio of 99:1, extruding and granulating in a double-screw extruder, and performing granulation in 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 extrusion film making
And (3) adding the polyester chip prepared in the step (2) into a melt extrusion film-making system, and obtaining the high-light-transmittance polyester film through extrusion, stretching, sizing and rolling.
Comparative example 1
A method for preparing a polyester film.
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 film prepared in the step (1) into melt spinning equipment, and carrying out melt spinning to obtain the polyester film.
Comparative example 2
A method for preparing a high-light-transmission and adjustable-refractive-index polyester film by using organic copper carboxylate specifically 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 barium oxide to 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
Mixing a polyester raw material with the organic copper carboxylate salt prepared in the step (1), adding a stabilizer, melting the polyester raw material and the organic copper carboxylate salt at a mass ratio of 98:2, extruding and granulating in a double-screw extruder, and performing granulation in 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 extrusion film making
And (3) adding the polyester chip prepared in the step (2) into a melt extrusion film-making system, and obtaining the high-light-transmittance polyester film through extrusion, stretching, sizing and rolling.
Comparative example 3
A polyester film with high light transmittance and adjustable refractive index prepared by organic barium carboxylate salt specifically comprises the following steps.
Step (1) Synthesis of barium salt of organic Carboxylic acid
Weighing barium oxide and oxalic acid, wherein the molar ratio of the barium 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 ℃, filtering, cooling, crystallizing and drying after the reaction is finished to obtain the organic barium carboxylate crystal.
Step (2) preparation of polyester chips
Mixing a polyester raw material with the organic barium carboxylate salt prepared in the step (1), adding a stabilizer, melting the polyester raw material and the organic barium carboxylate salt at a mass ratio of 98:2, extruding and granulating in a double-screw extruder, and performing granulation in 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 extrusion film making
And (3) adding the polyester chip prepared in the step (2) into a melt extrusion film-making system, and obtaining the high-light-transmittance polyester film through extrusion, stretching, sizing and rolling.
Comparative example 4
A preparation method of a polyester film specifically comprises the following steps.
Step (1) preparation of polyester chips
Mixing polyester raw material and barium oxide, wherein the mass ratio of the polyester raw material to organic barium carboxylate is 98:2, melting, extruding and granulating in a double-screw extruder, and performing N-phase granulation2Raising the temperature to 190 ℃ in the atmosphere, pre-crystallizing for 30min, then raising the temperature to 225 ℃, and keeping the temperature for 4 h.
Step (2) melt spinning
And (2) adding the polyester film prepared in the step (1) into melt spinning equipment, and carrying out melt spinning to obtain the polyester film with high light transmittance and adjustable refractive index.
Because the light transmittance and refractive index of the film are not well measured, the invention tests the properties of the spun material and the resulting chip, and again, those skilled in the art can predict the properties achieved by the final film. 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
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 (5)
1. A method for preparing a high-light-transmission and adjustable-refractive-index polyester film by utilizing organic barium carboxylate is characterized by comprising the following steps of: the method specifically comprises the following steps:
step (1) Synthesis of barium salt of organic Carboxylic acid
Weighing barium carbonate or barium oxide, weighing organic acid, adding a solvent, adding a certain amount of a blocking agent, reacting for a period of time, filtering, cooling, crystallizing and drying after the reaction is finished to obtain organic barium carboxylate crystals;
the blocking agent is one or more of hydroquinone, ethylene glycol and propylene glycol;
step (2) preparation of polyester chips
Mixing a polyester raw material with the organic barium carboxylate salt prepared in the step (1), adding a stabilizer, melting, extruding and granulating in a double-screw extruder, and heating to perform solid polymerization under the protection of inert gas;
the solid state polymerization condition is that the temperature is raised to 190 ℃, the pre-crystallization is carried out for 30min, then the temperature is raised to 225 ℃, the solid state polymerization is carried out, and the polymerization time is 4 h; or heating to 180 ℃, pre-crystallizing for 40min, heating to 230 ℃, and carrying out solid-phase polymerization for 5 h;
step (3) melt extrusion film making
Adding the polyester chip prepared in the step (2) into a melt extrusion film-making system, and obtaining a high-light-transmittance polyester film through extrusion, stretching, sizing and rolling;
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. The method for preparing the polyester film with high light transmittance and adjustable refractive index according to claim 1, wherein the method comprises the following steps: the molar ratio of the organic acid to the barium carbonate or barium oxide is 1.5-4: 1.
3. The method for preparing the polyester film with high light transmittance and adjustable refractive index according to claim 1, wherein the method comprises the following steps: the reaction temperature in the step (1) is 50-70 ℃, and the reaction time is 0.5-1 h.
4. The method for preparing the polyester film with high light transmittance and adjustable refractive index according to claim 1, wherein the method comprises the following steps: the stabilizer in the step (2) is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester.
5. A film obtained by the method for preparing the high-transmittance refractive-index adjustable polyester film as claimed in any one of claims 1 to 4, wherein: the film has a light transmittance of greater than 90% and a refractive index of 1.2-1.4.
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| CN101845202A (en) * | 2010-04-14 | 2010-09-29 | 佛山杜邦鸿基薄膜有限公司 | White semi-transparent polyester film and production method thereof |
| CN102453975A (en) * | 2010-10-21 | 2012-05-16 | 东丽纤维研究所（中国）有限公司 | Polyester fiber and braided fabric thereof |
| CN104809963A (en) * | 2015-05-15 | 2015-07-29 | 南京亚博联新材料科技股份有限公司 | Semi-transparent polyester film |
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2018
- 2018-08-16 CN CN201810934844.1A patent/CN109161039B/en active Active
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|---|---|---|---|---|
| CN1140770A (en) * | 1995-07-14 | 1997-01-22 | 第一合纤株式会社 | Method for manufacturing far infrared-radiating polyester fibers |
| JP2007063526A (en) * | 2005-08-03 | 2007-03-15 | Toray Ind Inc | Polymer dispersion and method for producing the same |
| CN101333329A (en) * | 2008-08-06 | 2008-12-31 | 中国石化仪征化纤股份有限公司 | Method for making polyester for low-haze biaxial stretching polyester film |
| CN101845202A (en) * | 2010-04-14 | 2010-09-29 | 佛山杜邦鸿基薄膜有限公司 | White semi-transparent polyester film and production method thereof |
| CN102453975A (en) * | 2010-10-21 | 2012-05-16 | 东丽纤维研究所（中国）有限公司 | Polyester fiber and braided fabric thereof |
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