CN113980451A - Antistatic particle for optics and preparation method and application thereof - Google Patents
Antistatic particle for optics and preparation method and application thereof Download PDFInfo
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- CN113980451A CN113980451A CN202111125594.5A CN202111125594A CN113980451A CN 113980451 A CN113980451 A CN 113980451A CN 202111125594 A CN202111125594 A CN 202111125594A CN 113980451 A CN113980451 A CN 113980451A
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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
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/41—Compounds containing sulfur bound to oxygen
- C08K5/42—Sulfonic acids; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/16—Optical coatings produced by application to, or surface treatment of, optical elements having an anti-static effect, e.g. electrically conducting coatings
Abstract
The invention belongs to the technical field of optical film preparation, and particularly relates to an antistatic particle for optics and a preparation method and application thereof. The antistatic coating comprises polymer particles, a plasticizer, a dispersing agent and an antistatic agent, wherein the polymer particles are one or a combination of polymethyl methacrylate particles, polybutyl methacrylate particles, polyamide particles or polyurethane particles. Adding the optical antistatic particles into acrylic glue, uniformly stirring by taking ethyl acetate and butyl acetate as solvents, adding isocyanate glue, uniformly stirring, and coating to obtain the optical film. The invention prepares the antistatic agent and the polymer particles which need to be added into the composite particles by an extrusion process in advance, and then adds the composite particles into the resin for processingAnd coating the prepared optical film. The optical film prepared by the invention has good antistatic effect (surface resistance 10)10 . 5～1011 . 8Ω), and the problem of precipitation of the antistatic agent does not occur in a high-temperature and high-humidity environment.
Description
Technical Field
The invention belongs to the technical field of optical film preparation, and particularly relates to an antistatic particle for optics and a preparation method and application thereof.
Background
With the development of science and technology, electronic appliances gradually go deep into the aspects of people's life. From the first to the first meeting of primary display functions, to the later, people have increasingly higher imaging requirements for televisions, cell phones, VR (virtual reality) devices, and the like. In the aspect of thickness, electronic products are thinner and thinner, and optical films are thinner and thinner; in the aspect of color, the color is more and more bright and the color reality degree is more and more high; in the aspect of appearance, the professional angle detection is flawless, and no abnormal phenomenon is caused when the user looks by naked eyes; in the reliability test, no additive is separated out, and the look and feel of a client are not influenced.
Among the various requirements of customers, the antistatic effect of the diffusion film is one of the important indexes. Firstly, static electricity is generated in the cutting process of the membrane, and if the diffusion membrane has no anti-static effect, the static electricity is accumulated; the accumulated static electricity can adsorb impurities in the environment, so that the diffusion film is black after being assembled in the optical module, and the visual perception of a customer is influenced. Secondly, the diffusion membrane without antistatic performance can generate charge accumulation in the use process, and the charge accumulation can cause electric breakdown to a certain degree, thereby causing destructive damage to the display screen. Moreover, the charge accumulation to a certain degree can cause the instantaneous discharge of voltage, so that devices such as an LED and a heterojunction are instantaneously broken down, and the irreversible damage of electronic components is caused.
Regarding the antistatic research of optical films, chinese patent CN106896427A discloses an antistatic optical film and a method for manufacturing the same, in which a plurality of negative ion groups on the surface of a resin layer adsorb positive metal particles, and charges are transferred by the conductivity of the metal particles to form an antistatic effect. However, the method needs to perform alkalization treatment on the resin layer, the process is complex, the metal is hard, and other optical membranes are easily scratched. Chinese patent CN205210327U discloses an anti-scratch and anti-static optical diffusion film, which is formed by adding an anti-static layer on the surface of the anti-scratch layer of the existing optical film to achieve the anti-static effect. The method has complex process, and the antistatic layer is coated on line after the optical film preparation is required; and the original membrane is easy to be damaged in the secondary coating process, thereby influencing the product performance. Chinese patent CN208334690U discloses an anti-scratch and anti-static optical diffusion film, in which zinc sulfide and zinc oxide particles are coated on the surface of resin to play an anti-static role. Due to the fact that zinc sulfide and zinc oxide are high in hardness, other optical films are prone to being scratched.
Based on the antistatic requirement of electronic devices, the antistatic effect is achieved mainly by directly adding an antistatic agent into resin in the preparation of the optical film at present. While this solution solves the electrostatic problem, it also introduces some potential problems. When the antistatic optical film prepared by the scheme is tested at high temperature and high humidity, the phenomenon that the antistatic agent is excessively precipitated on the surface layer to form water drops (as shown in figure 1) can occur, the appearance is poor, and the use feeling of customers is influenced.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide the antistatic particle for the optical use, which solves the potential problem caused by directly adding the antistatic agent in the production of the optical film and also improves the problem of the precipitation of the antistatic agent in long-time use or harsh environment; the invention also provides a preparation method and application thereof.
The antistatic particle for optics comprises polymer particles, a plasticizer, a dispersing agent and an antistatic agent, wherein the mass ratio of the polymer particles, the plasticizer, the dispersing agent and the antistatic agent is 100: 1-10: 1-5: 1-6;
the polymer particles are one or a combination of polymethyl methacrylate (PMMA) particles, polybutyl methacrylate (PBMA) particles, Polyamide (PA) particles or Polyurethane (PU) particles.
The antistatic agent is one or the combination of anionic antistatic agent and nonionic antistatic agent.
The antistatic agent is positioned on the surface layer and inside the polymer particles.
The plasticizer is one or a combination of more of phthalic acid esters, fatty acid esters, phosphoric acid esters or epoxy esters.
The dispersant is a macromolecular dispersant.
The antistatic particles for optical use have a particle size of 1 to 50 μm.
Preferably, the mass ratio of the polymer particles, the plasticizer, the dispersant and the antistatic agent is 100: 8-10: 3-5: 4.
the preparation method of the antistatic particles for optics comprises the following steps:
(1) weighing polymer particles, a plasticizer, a dispersant and an antistatic agent, and mechanically stirring to uniformly mix the polymer particles, the plasticizer, the dispersant and the antistatic agent;
(2) adding the uniformly mixed materials into a double-screw extruder for granulation and drying to obtain the millimeter grade
Particles;
(4) and (3) crushing the particles at low temperature to obtain micron-scale particles, namely the antistatic particles for optics.
In the step (2), the technological parameters of the double-screw extruder are as follows: the temperature is 190 ℃ and 280 ℃, the rotating speed is 300 ℃ and 500rpm, and the melt pressure is less than or equal to 10 MPa.
Preferably, the preparation method of the antistatic particle for optical use comprises the following steps:
(1) weighing polymer particles, a plasticizer, a dispersant and an antistatic agent, and mechanically stirring to uniformly mix the polymer particles, the plasticizer, the dispersant and the antistatic agent;
(2) the interior of the double-screw extruder is cleaned, and a three-layer filter screen is arranged at the head, so that the cleanliness of the experimental environment and the reliability of impurity removal in the process are ensured;
(3) adding the uniformly mixed materials into a double-screw extruder to prepare clean millimeter-grade particles;
(4) drying the particles, and pulverizing at low temperature to obtain micrometer-grade particles.
The plasticizer is used, so that the molecular chain spacing of the high polymer is increased, the molecular motion is easier, and the transfer of the antistatic agent is facilitated; meanwhile, the dispersant can enable the antistatic agent and the polymer particles to be dispersed more uniformly, and a good antistatic effect is achieved.
The application of the antistatic particles for optics is used for preparing a diffusion film.
The diffusion film comprises a diffusion layer, a PET (polyethylene terephthalate) substrate and an anti-scratching layer, wherein the diffusion layer and the anti-scratching layer respectively comprise optical antistatic particles, acrylic glue, isocyanate glue and a dispersing auxiliary agent. The antistatic particles for optics, the acrylic acid glue and the isocyanate glue are stirred and mixed uniformly in ethyl acetate and butyl acetate solvents, and then the mixture is coated on a PET substrate to prepare a diffusion layer or an anti-scratching layer.
Preferably, the preparation method of the diffusion membrane specifically comprises the following steps:
(1) measuring solvents of ethyl acetate, butyl acetate and acrylic acid glue, and mechanically stirring uniformly;
(2) then weighing the antistatic particles for optics, adding the antistatic particles into the materials, and uniformly stirring;
(3) weighing a proper amount of dispersing auxiliary agent and isocyanate glue, mixing and uniformly stirring to obtain slurry;
(4) the prepared slurry was coated on a PET substrate to prepare a diffusion film, and aged at 60 ℃ for 24 hours.
Compared with the prior art, the invention has the following beneficial effects:
1. simple process and good performance. Most of the traditional methods are multi-coating or introducing conductive metal elements, and the multi-coating not only increases the process loss and complexity, but also can cause the damage of the membrane performance; and the introduction of metal substances can damage other membranes due to hardness problems, so that the performance is damaged.
2. The problem of display defects caused by the precipitation of the antistatic agent is solved. In the existing production process of the industry, the antistatic agent is added externally, precipitation and aggregation occur under harsh environment or long-time working condition, water drop defect occurs during display, and the use of customers is influenced. The invention introduces the antistatic particles, cancels the external addition of the antistatic agent and avoids the abnormal precipitation phenomenon.
3. The defects generated during coating are reduced. In the prior production of optical films, the antistatic effect is achieved by adding an antistatic agent into resin. The antistatic agent in the resin is easy to generate abnormal phenomena such as film surface patterns, flow patterns and the like, so that the debugging of the process and the waste of products are caused. And the use of the antistatic particles avoids the direct addition of an antistatic agent, reduces defects, saves materials and reduces waste.
4. The invention prepares the antistatic agent and the polymer particles which need to be added into the optical film by an extrusion process in advance to form composite particles, and then adds the composite particles into resin for coating. The optical film prepared by the method has good antistatic effect (surface resistance 10)10.5～1011.8Ω), and the problem of precipitation of the antistatic agent does not occur in a high-temperature and high-humidity environment.
Drawings
FIG. 1 is a photomicrograph of a drop defect formed by precipitation and aggregation of an antistatic agent;
FIG. 2 is a microphotograph showing that no antistatic agent is precipitated in the normal product.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
Example 1
The antistatic particle for optical use comprises polymer particles, a plasticizer, a dispersing agent and an antistatic agent. In this example, the preparation of the antistatic particles using PU particles was specifically performed as follows:
(1) weighing 10.000kg of PU particles, adding 0.100kg of Huawang ME-2 antistatic agent, 1.000kg of Basff plasticizer and 0.500kg of BYK dispersing agent, putting into a high-speed stirrer, and uniformly mixing;
(2) installing three layers of filter screens at the head of a double-screw extruder, and adding the uniformly mixed materials into the extruder to obtain millimeter-scale antistatic particles;
(3) drying and dewatering the antistatic particles to obtain particles with low water content;
(4) pulverizing the above dried particles at low temperature to obtain micrometer-sized particles.
Wherein the feeding ratio of the polymer particles, the plasticizer, the dispersing agent and the antistatic agent is 100:10:5:1, and the size of the prepared antistatic particles for the optical use is 1-50 mu m.
The preparation method of the diffusion film comprises the following steps:
(1) weighing 6.000kg of a mixture of ethyl acetate and butyl acetate as solvents (mixed by a ratio of 2: 1) and 4.000kg of acrylic glue, and mechanically stirring for 2 hours until the mixture is uniform;
(2) weighing 4.200kg of optical antistatic particles, adding the optical antistatic particles into a stirring barrel, and stirring for 2 hours until the particles are uniform;
(3) weighing 0.300kg of dispersing aid and 0.500kg of isocyanate glue, and mechanically stirring for 1 hour to be uniform after mixing;
(4) coating the uniformly mixed materials to prepare a diffusion film, and curing at 60 ℃ for 24 hours until the diffusion film is completely cured;
(5) the diffusion membranes were tested according to tables 1 and 2.
TABLE 1 parameters and results of the antistatic effect of the diffusion membrane
| Instrument for measuring the position of a moving object | Number of test points | Numerical value taking | Results/omega |
| Surface resistance meter | 9 o' clock | Mean value of | 1011.8 |
Table 2 high temperature high humidity testing of diffusion membranes
| Instrument for measuring the position of a moving object | Condition | Time of measurement | Testing the number of membranes | Surface resistance/omega | Water drop |
| High-temperature high-humidity box | 65℃、95％RH | 100h | 9 pieces | 1012 | Is free of |
In this example, antistatic particles for optical use were prepared in an amount of 1% of the antistatic agent addition amount and used to prepare an optical film having a surface resistance of 1011.8Omega, meets the antistatic requirement of the optical film (the surface resistance of the optical film in the optical industry is less than or equal to 10)12Ω, all considered to have an antistatic effect).
Placing the optical film in a high temperature and high humidity chamber, taking out after 100h experiment, observing no water drop phenomenon on the surface of the optical film (as shown in figure 2), and testing that the surface resistance is 1012Omega, meets the antistatic requirement.
Example 2
Antistatic particles for optical use and a diffusion film as provided in example 1, except that the charge ratio of the polymer particles to the antistatic agent in step (1) was 100: 7.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements, but the diffusion film has a water drop phenomenon after high temperature and high humidity and does not meet the requirements.
Example 3
The antistatic particles for optical use and the diffusion film as provided in example 1 were different in that the charge ratio of the polymer particles to the antistatic agent in step (1) was 100: 6.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements, and the diffusion film does not have the water drop phenomenon after high temperature and high humidity and meets the requirements.
Example 4
The antistatic particles for optical use and the diffusion film as provided in example 1 were different in that the charge ratio of the polymer particles to the antistatic agent in step (1) was 100: 5.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements, and the diffusion film does not have the water drop phenomenon after high temperature and high humidity and meets the requirements.
Example 5
The antistatic particles for optical use and the diffusion film as provided in example 1 were different in that the charge ratio of the polymer particles to the antistatic agent in step (1) was 100: 4.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements, and the diffusion film does not have the water drop phenomenon after high temperature and high humidity and meets the requirements.
Example 6
The antistatic particles for optical use and the diffusion film as provided in example 1 were different in that the charge ratio of the polymer particles to the antistatic agent in step (1) was 100: 3.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements, and the diffusion film does not have the water drop phenomenon after high temperature and high humidity and meets the requirements.
Example 7
The antistatic particles for optical use and the diffusion film as provided in example 1 were different in that the charge ratio of the polymer particles to the antistatic agent in step (1) was 100: 2.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements, and the diffusion film does not have the water drop phenomenon after high temperature and high humidity and meets the requirements.
Example 8
The antistatic particles for optical use and the diffusion film as provided in example 1, except that in step (1), the polymer particles are PBMA particles, and the charge ratio of the PBMA particles, the plasticizer, the dispersant, and the antistatic agent is 100:10:5: 4.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements, and the diffusion film does not have the water drop phenomenon after high temperature and high humidity and meets the requirements.
Example 9
The optical antistatic particles and the diffusion film as provided in example 1 are different in that PA particles are selected as the polymer particles in step (1), and the ratio of PA particles to plasticizer to dispersant to antistatic agent is 100:10:5: 4.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements, and the diffusion film does not have the water drop phenomenon after high temperature and high humidity and meets the requirements.
Example 10
According to the analysis of examples 1 to 7, the experiment was carried out with a proportion of 4% antistatic, taking into account the amount of addition and the antistatic effect achieved.
The method for preparing the antistatic particles for optical use as in example 1, except that the charge ratio of the polymer particles, the plasticizer, the dispersant and the antistatic agent is 100:0:0: 4.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements; however, after high temperature and high humidity, the water drop phenomenon appears in 2 diffusion films, and the water drop phenomenon does not appear in the other 7 diffusion films.
Example 11
The method for preparing the antistatic particles for optical use as provided in example 1, except that the charge ratio of the polymer particles, the plasticizer, the dispersant and the antistatic agent is 100:1:1: 4.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements, and the diffusion film does not have the water drop phenomenon after high temperature and high humidity and meets the requirements.
Example 12
The method for preparing the antistatic particles for optical use as in example 1, except that the charge ratio of the polymer particles, the plasticizer, the dispersant and the antistatic agent is 100:8:3: 4.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements, and the diffusion film does not have the water drop phenomenon after high temperature and high humidity and meets the requirements.
Example 13
The method for preparing the antistatic particles for optical use as in example 1, except that the charge ratio of the polymer particles, the plasticizer, the dispersant and the antistatic agent is 100:9:4: 4.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements, and the diffusion film does not have the water drop phenomenon after high temperature and high humidity and meets the requirements.
Example 14
The method for preparing the antistatic particles for optical use as in example 1, except that the charge ratio of the polymer particles, the plasticizer, the dispersant and the antistatic agent is 100:9:4: 6.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements, and the diffusion film does not have the water drop phenomenon after high temperature and high humidity and meets the requirements.
Comparative example 1
Unlike example 1, in this example, the original unmodified polymer particles were used, and an antistatic agent was added to the resin, and a diffusion film was specifically prepared as follows:
(1) measuring 6.000kg of ethyl acetate and butyl acetate (mixed by 2: 1) as solvents, 4.000kg of acrylic acid glue, and mechanically stirring for 2 hours until the mixture is uniform;
(2) weighing 4.200kg of polymer particles and 0.042kg of antistatic agent (1 wt% of the polymer particles) and adding into a stirring barrel to stir for 2 hours until the mixture is uniform;
(3) weighing 0.300kg of dispersing aid and 0.5kg of isocyanate glue, mixing, and mechanically stirring for 1h to be uniform;
(4) coating the uniformly mixed materials to obtain a diffusion film, and curing at 60 ℃ for 24 hours until the diffusion film is completely cured;
the above diffusion film was tested according to tables 1 and 2 in example 1, and the results showed that no water drop occurred in the original film and the film after high temperature and high humidity, but the surface resistance values of the films were all greater than 1012Ω。
Comparative example 2
The optical film preparation method as provided in comparative example 1, except that the polymer particles: the feed ratio of the antistatic agent is 100: 4.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements, but the diffusion film has a water drop phenomenon after high temperature and high humidity and does not meet the requirements.
Comparative example 3
The optical film preparation method as provided in comparative example 1, except that the polymer particles: the charge ratio of the antistatic agent is 100: 7.
The surface resistance of the diffusion film and the surface resistance after high temperature and high humidity are measured to meet the requirements, but the diffusion film has a water drop phenomenon after high temperature and high humidity and does not meet the requirements.
TABLE 3 surface resistance and Water dropping behavior of examples 1 to 14 and comparative examples 1 to 3
The examples 1 to 7 were analyzed, and it was found that the antistatic effect was enhanced by increasing the proportion of the antistatic agent; when the addition ratio exceeds 4%, the antistatic effect is not obviously increased; when the adding proportion reaches 7%, the diffusion film has water drop phenomenon after high temperature and high humidity. The addition amount and the realized effect are comprehensively considered, 1 to 6 percent of the total amount can be used, and 4 percent of the total amount is optimal.
When the plasticizer and the dispersant were not added, the partially diffused films prepared by analyzing examples 5 and 10 to 13 showed a water drop phenomenon. Along with the addition and gradual increase of the plasticizer and the dispersant (the proportion of the antistatic agent is unchanged), the antistatic effect is increased, and no water drops occur after the film is heated at high temperature and high humidity. When the proportion of the plasticizer reaches 8 percent and the proportion of the dispersing agent reaches 3 percent, the effect is consistent with that when the proportion of the plasticizer reaches 10 percent and the proportion of the dispersing agent reaches 5 percent. In analytical example 14, the plasticizer ratio was 9%, the dispersant ratio was 4%, and the antistatic agent ratio was 6%, and the antistatic effect of the diffusion film was satisfactory and no water drops appeared after high temperature and high humidity.
Analysis of examples 5, 8 and 9 shows that the antistatic effect is equivalent to that obtained in the case where the addition ratio of the plasticizer, the dispersant and the antistatic agent is the same among the polymer particles, and that no water drop occurs after high temperature and high humidity.
According to analysis of example 1 and comparative example 1, the antistatic effect and the effect after high temperature and high humidity of the diffusion film prepared by the antistatic particles prepared by the invention meet the requirements; in the existing production mode of the diffusion film, the surface resistance exceeds the standard (more than 10)12Omega) to show that the scheme of the patent has better effect.
Analyzing example 5 and comparative example 2, the film prepared by the scheme of the patent is normal after high temperature and high humidity due to the addition of the antistatic agent in the same proportion; and the existing method for preparing the membrane has the phenomenon of water drop after high temperature and high humidity, and does not meet the requirement.
Through comparative analysis, the antistatic particles can achieve a good antistatic effect, and simultaneously solve the problem of precipitation of antistatic agents in the current scheme.
Claims (9)
1. An antistatic particle for optical use, characterized in that: the antistatic agent comprises polymer particles, a plasticizer, a dispersing agent and an antistatic agent, wherein the mass ratio of the polymer particles, the plasticizer, the dispersing agent and the antistatic agent is 100: 1-10: 1-5: 1-6;
the polymer particles are one or a combination of a plurality of polymethyl methacrylate particles, polybutyl methacrylate particles, polyamide particles or polyurethane particles;
the antistatic agent is one or the combination of anionic antistatic agent and nonionic antistatic agent.
2. The antistatic particle for optical use according to claim 1, characterized in that: the plasticizer is one or a combination of more of phthalic acid esters, fatty acid esters, phosphoric acid esters or epoxy esters.
3. The antistatic particle for optical use according to claim 1, characterized in that: the dispersant is a macromolecular dispersant.
4. The antistatic particle for optical use according to claim 1, characterized in that: the antistatic particles for optical use have a particle size of 1 to 50 μm.
5. The antistatic particle for optical use according to claim 1, characterized in that: the mass ratio of the polymer particles, the plasticizer, the dispersing agent and the antistatic agent is 100: 8-10: 3-5: 4.
6. a method for preparing the antistatic particle for optical use according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:
(1) weighing polymer particles, a plasticizer, a dispersant and an antistatic agent, and uniformly mixing;
(2) adding the uniformly mixed materials into a double-screw extruder for granulation and drying to prepare millimeter-level particles;
(4) and (3) crushing the particles at low temperature to obtain micron-scale particles, namely the antistatic particles for optics.
7. The method for producing antistatic particles for optical use according to claim 6, characterized in that: the technological parameters of the double-screw extruder are as follows: the temperature is 190 ℃ and 280 ℃, the rotating speed is 300 ℃ and 500rpm, and the melt pressure is less than or equal to 10 MPa.
8. Use of the antistatic particles for optical use according to any one of claims 1 to 5, characterized in that: used for preparing diffusion membranes.
9. Use of the antistatic particle for optical use according to claim 8, characterized in that: the diffusion film comprises a diffusion layer, a PET (polyethylene terephthalate) substrate and an anti-scratching layer, wherein the diffusion layer and the anti-scratching layer respectively comprise optical antistatic particles, acrylic glue, isocyanate glue and a dispersing auxiliary agent.
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| CN112029128A (en) * | 2020-08-28 | 2020-12-04 | 合肥乐凯科技产业有限公司 | Antistatic polyester film and preparation method thereof |
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