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High-light-transmittance polyester film and manufacturing method thereof

A polyester film and high light transmittance technology, applied in the field of biaxially oriented polyester film, can solve the problems that the transparency of the film cannot meet the application requirements, the undisclosed use of a third monomer, etc., and achieve the promotion of mechanical properties and processing performance, Solve the effect of easy agglomeration, difficult dispersion and simple production process

Pending Publication Date: 2022-07-05
HANGZHOU HESHUN TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, a variety of polyester chips are blended and extruded, and biaxially stretched; the polyester chip A contains shell micropowder, and the polyester chip B contains nano-montmorillonite, and its longitudinal thermal shrinkage rate is 0 at 180°C. ~1% range; but the copolyester of this invention does not disclose the use of the third monomer, and the inorganic particles used are different from the present invention, and at the same time, the products prepared by this invention are only dedicated to improving the heat shrinkage of the film, The transparency of the film cannot meet the application requirements

Method used

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  • High-light-transmittance polyester film and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] After the 1,4-cyclohexanediol with a molar ratio of 0.2:10 is mixed with ethylene glycol and a catalyst, it is then mixed with terephthalic acid, heated, and vacuumed to react. After the reaction is completed, the pressure is reduced, the material is discharged, and the cooling , dicing to make copolyester chips; grinding the copolyester chips into powder, mixing with barium sulfate with a particle size of 1.4 μm and dispersing agent, and then extruding and granulating through twin-screw to prepare optical opening masterbatch; The copolyester powder is mixed with 40nm nano-kaolin particles and dispersant, and then extruded and granulated by twin screw to prepare a crystal nucleating agent; in terms of mass percentage, 96% of copolyester chips and 3% of optical aperture masterbatch With 1% of the crystallization nucleating agent, it is sent to the corresponding silo of the main extruder through the suction system, and is fed into the extruder. After melting, vacuuming and...

Embodiment 2

[0045] After mixing 1,4-cyclohexanediol and isosorbide (the molar ratio of 1,4-cyclohexanediol and isosorbide is 1:10) with ethylene glycol and a catalyst in a molar ratio of 0.2:10, It is mixed with terephthalic acid, heated, and reacted with vacuum. After the reaction is completed, the pressure is reduced, the material is discharged, cooled, and diced to make copolyester chips; After mixing barium sulfate and dispersant, it is extruded and granulated by twin-screw to prepare optical open master batch; the copolyester powder is mixed with nano-kaolin particles with a particle size of 50nm and dispersant, and then extruded and granulated by twin-screw to prepare Obtain crystallization nucleating agent; in mass percentage, send 96% of copolyester chips, 2% of optical opening masterbatch and 2% of crystallization nucleating agent to the corresponding silo of the main extruder through the suction system , fed into the extruder, melted, vacuumed and filtered to remove the moisture...

Embodiment 3

[0047] After mixing 1,4-cyclohexanediol and isosorbide (the molar ratio of 1,4-cyclohexanediol and isosorbide is 1:1) with ethylene glycol and a catalyst in a molar ratio of 0.2:10, It is mixed with terephthalic acid, heated, and reacted with vacuum. After the reaction is completed, the pressure is reduced, the material is discharged, cooled, and diced to make copolyester chips; After mixing barium sulfate and dispersant, it is extruded and granulated by twin-screw to prepare optical open master batch; the copolyester powder is mixed with nano-kaolin particles with a particle size of 50nm and dispersant, and then extruded and granulated by twin-screw to prepare Obtain crystallization nucleating agent; in mass percentage, send 96% of copolyester chips, 2% of optical opening masterbatch and 2% of crystallization nucleating agent to the corresponding silo of the main extruder through the suction system , fed into the extruder, melted, vacuumed and filtered to remove the moisture,...

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Abstract

The invention discloses a high-light-transmittance polyester film and a manufacturing method thereof, the high-light-transmittance polyester film comprises the following components in percentage by mass: 93-98% of copolyester chip copolymerized and modified by a third monomer, 1-5% of optical opening master batch and 1-2% of crystallization nucleating agent, and the high-light-transmittance polyester film with the thickness of 12-75 microns is obtained through melt extrusion and two-way stretching. The light transmittance is improved by reducing the scattering loss of visible light in the polyester film, and the polyester film has the characteristics of simple production process, low production cost and reservation of the thermal stability of a common polyester film, and can be applied to the field of electronic display.

Description

technical field [0001] The invention belongs to the technical field of biaxially oriented polyester film (BOPET), and particularly relates to a method for improving the light transmittance of the BOPET film. Background technique [0002] Biaxially oriented polyester film (BOPET) has excellent physical and chemical properties. Due to its excellent optical properties, mechanical properties and low cost, BOPET is widely used in the display field. Generally speaking, the light transmittance of transparent polyester film is in the range of 88-89%, and the loss of light transmittance of optical resin in the visible light region is mainly caused by the following three factors: light reflection, scattering and absorption, BOPET light transmission The loss of rate is mainly caused by reflection and scattering. At present, most of the methods to increase the light transmittance of polyester film to about 92% are based on coating a layer of low refractive index material on the surface ...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K3/30C08K3/34C08J5/18C08G63/672
CPCC08J5/18C08G63/672C08J2367/02C08K2003/3045C08K3/346C08K2201/011
Inventor 陈正坚陆宇楼涛张军范和强
Owner HANGZHOU HESHUN TECH CO LTD
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