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Optical-scale polyester film and preparation method thereof

A polyester film, optical-grade technology, applied in the field of optical base film for liquid crystal display, can solve the problems of inconvenient processing, increased fogging of polyester film, large friction coefficient of polyester film, etc. The effect of improving surface friction coefficient and light transmittance

Active Publication Date: 2012-12-19
JIANGSU YUXING FILM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the addition of the inorganic anti-blocking agent, due to its poor dispersibility, it will increase the fogging of the polyester film, and because the refractive index of silicon dioxide is 1.45, the refractive index of polyethylene terephthalate 1.69, the light refracts and diffuses on the phase interface between the inorganic anti-blocking agent and the polyester matrix, which destroys the transparency of the optical polyester film to a certain extent, and seriously affects the light transmittance of the polyester film. , so the light transmittance of ordinary transparent polyester film is generally below 90%, so the application in the field of optical polyester film is limited
If no silica powder is added to the polyester chips, although the light transmittance of the polyester film can reach 96-98%, the coefficient of friction between the polyester films is relatively large, so it can be used in winding, unwinding, slitting and Downstream processing is more difficult, resulting in inconvenient processing

Method used

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  • Optical-scale polyester film and preparation method thereof
  • Optical-scale polyester film and preparation method thereof
  • Optical-scale polyester film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] According to mass percentage, after adding 0.04% cross-linked polystyrene microspheres into 0.1% solvent and fully dissolving them, the cross-linked polystyrene microspheres are cross-linked polystyrene microspheres or cross-linked polystyrene microspheres. Type polymethylstyrene microspheres, the solvent is tetrahydrofuran or carbon tetrachloride, the particle size of cross-linked polystyrene microspheres is controlled at 5-8μm, and then add 3% polyacrylate resin and 0.5% Melamine and 0.05% colloidal silicon dioxide, colloidal silicon dioxide with a particle size of 50nm colloidal silicon dioxide and 100nm colloidal silicon dioxide, of which 50nm colloidal silicon dioxide and 100nm colloidal silicon dioxide are half each, stir well and then add Dilute with 96.31% deionized water to prepare a primer coating solution with a solid content of 3.59% for later use.

[0024]The present invention selects polyester chips with an intrinsic viscosity of 0.4-0.7dL / g, and the polye...

Embodiment 2

[0031] According to mass percentage, add 0.06% cross-linked polystyrene microspheres into 0.4% solvent to fully dissolve, and the cross-linked polystyrene microspheres are cross-linked polyethylstyrene microspheres or cross-linked polystyrene microspheres. Linked polypropylstyrene microspheres, the ratio of the two is not limited, the solvent is chloroform or dichloromethane, the particle size of cross-linked polystyrene microspheres is controlled at 6-10μm, and then 5% polyurethane is added Resin and melamine of 0.8% and colloidal silicon dioxide of 0.1%, colloidal silicon dioxide adopts particle diameter at 80nm colloidal silicon dioxide and 110nm colloidal silicon dioxide, wherein 80nm colloidal silicon dioxide and 110nm colloidal silicon dioxide are by mass parts The number ratio is 4:6, stir evenly and then add 93.64% deionized water to dilute to prepare a primer coating solution with a solid content of 5.96% for use.

[0032] The present invention selects polyester chips...

Embodiment 3

[0034] According to the mass percentage, add 0.08% cross-linked polystyrene microspheres to 0.2% solvent to fully dissolve, the cross-linked polystyrene microspheres are cross-linked polystyrene microspheres and cross-linked polystyrene microspheres A mixture of polypropylene styrene microspheres, the ratio of the two is not limited, the solvent is chloroform or dichloromethane, the particle size of the cross-linked polystyrene microspheres is controlled at 2-5 μm, and then 8% polystyrene is added Ester resin and 1.1% oxazoline and 0.12% colloidal silica, colloidal silica with a particle size of 60nm colloidal silica and 100nm colloidal silica, of which 60nm colloidal silica and 100nm colloidal silica According to the mass-number ratio of 6:4, stir evenly and then add 90.5% deionized water to dilute to prepare a primer coating solution with a solid content of 9.28% for use.

[0035] The present invention selects polyester chips with an intrinsic viscosity of 0.4-0.7dL / g, and t...

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Abstract

The invention relates to an optical-scale polyester film, which comprises a polyester base film and bottom coatings, wherein the polyester base film only contains polyethylene glycol terephthalate; the bottom coatings are coated on two surfaces of the polyester base film; the thickness of each bottom coating is 0.05-0.3mu m; and each bottom coating contains colloidal silicon dioxide and crosslinking polystyrene microspheres. The polyester base film in the optical-scale polyester film does not contain silicon dioxide, and the transparency of the polyester base film can be guaranteed; the bottom coatings contain the crosslinking polystyrene microspheres serving as organic anti-adhesion agent and the colloidal silicon dioxide serving as inorganic anti-adhesion agent; rough surfaces can be formed on two surfaces of the polyester film, and the surface of the polyester film has good smooth property, anti-adhesion property, anti-scratching property and anti-falling property, thereby being convenient to process; the refractive index of the crosslinking polystyrene microspheres is similar to the refractive index of the polyethylene glycol terephthalate; therefore the refraction and the diffuse reflection of ray on a phase boundary of the anti-adhesion agent and polyester matrix can be effectively inhibited; and the ray transmittance is improved.

Description

technical field [0001] The invention relates to an optical-grade polyester film and a preparation method thereof, belonging to the technical field of optical base films for liquid crystal displays Background technique [0002] Biaxially oriented polyester film (BOPET) has excellent optical properties, mechanical properties, dimensional stability and heat resistance, and is widely used in optical base films for liquid crystal displays. [0003] After the optical polyester film is biaxially stretched and pre-coated, the coating itself has the characteristics of easy adhesion, and the excellent optical properties endow the surface of the film with a very low roughness, so the surface of the optical polyester film is prone to adhesion. , which brings inconvenience to the processing of optical polyester film. In order to improve the anti-blocking property of optical polyester film, in the production process of optical polyester film, it is necessary to add silica powder as an in...

Claims

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Application Information

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IPC IPC(8): B32B27/36B32B33/00B29C69/02B29C55/12B29B15/10C09D133/00C09D175/04C09D167/00C09D125/06C09D125/16C09D7/12
Inventor 刘勤学刘守忠朱益明蒙钊胡婧
Owner JIANGSU YUXING FILM TECH
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