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Polyvinyl alcohol optical film and preparation method thereof

A polyvinyl alcohol-based, polyvinyl alcohol-based technology, applied in the field of polyvinyl alcohol-based optical films and their preparation, can solve problems such as the inability to guarantee the contrast and clarity of large-scale liquid crystal displays, and the decline in the production continuity of polarizing films, achieving Achieve optical uniformity, excellent surface cleanliness, and ensure the effect of optical uniformity

Inactive Publication Date: 2017-09-15
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since then, the continuity of polarizing film production has declined, and at the same time, the contrast and clarity of large-scale liquid crystal displays cannot be guaranteed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This implementation discloses a polyvinyl alcohol-based optical film. The raw materials for preparation include the following components in parts by mass: 25-33% polyvinyl alcohol, 9-18% plasticizer, surfactant and antioxidant 1 % or less, the degree of polymerization of polyvinyl alcohol is 1500-3000, and the degree of alcoholysis is 97-100mol%; the plasticizer is a polyhydroxy compound, preferably glycerin, with a purity of ≥99.5%, and the antioxidant is selected as 1010 / 168 as 1: The composition of 1; the film in any region on the optical film, the optical transmittance of the optical film is tested in the wavelength range of 400-1000nm, the optical transmittance is 91%, and the optical transmittance is excellent.

[0045] The present invention also provides a preparation method for preparing the above-mentioned polyvinyl alcohol-based optical film, comprising the following steps:

[0046] (1) The polyvinyl alcohol raw material after post-treatment (re-alcoholysis an...

Embodiment 2

[0051] The difference between this embodiment and embodiment 1 is:

[0052] (1) The wind speed in the air-floating oven is 26m / sec, and the humidity of the optical film is controlled to be 66% in the air-floating oven, and the moisture content in any region of the optical film is controlled to reach 2.5%; At 2m on the side of the oven outlet, there is a humidity callback nozzle.

[0053] (2) The optical transmittance of the optical film is tested in the wavelength range of 400-1000nm, and the optical transmittance is 90.5%, which is excellent in optical transmittance.

Embodiment 3

[0055] The difference between this embodiment and embodiment 1 is:

[0056] (1) The wind speed in the air flotation oven is 14m / sec, and the humidity of the optical film is controlled to be 59% in the air flotation oven, and the moisture content in any region of the optical film is controlled to reach 3.0%; There is a humidity callback nozzle 3m away from the outlet side of the type oven.

[0057] (2) The optical transmittance of the optical film is tested in the wavelength range of 400-1000nm, and the optical transmittance is 89.5%, which is excellent in optical transmittance.

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PUM

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Abstract

The invention discloses a polyvinyl alcohol optical film and a preparation method thereof. The preparation raw materials comprise polyvinyl alcohol, plasticizer, surfactant and anti-oxidant. Film sheets in any region are prepared on an optical film, and the optical transmittance of the optical film is tested in the wavelength range of 400-1000nm. The optical transmittance is 90+ / -3%, so the optical permeability of the optical film is excellent. According to the invention, the optical film has excellent optical permeability in the wavelength range of 400-1000nm.

Description

technical field [0001] The invention relates to a polymer compound composition, in particular to a polyvinyl alcohol-based optical film and a preparation method thereof. Background technique [0002] Liquid crystal display (LCD) has gradually replaced the traditional cathode ray tube (CRT) with its advantages of thinness, low power consumption, no radiation, stable image, and easy large-area display, and has become the mainstream product of terminal display in the information age. Polarizer is the core component of liquid crystal display, which has light transmission and light shielding functions. With the development of LCD applications from small instruments such as calculators, testing instruments, various polarization microscopes, sunglasses, anti-glare goggles, and anti-glare devices for car headlights to the current mobile phones, tablets, computers, LCD TVs, LCDs, etc. Color projectors, LCD monitors, video cameras, car navigation systems, etc., are constantly expandi...

Claims

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Application Information

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IPC IPC(8): G02B5/30C08K5/053C08L29/04
CPCC08J5/18C08J2329/04C08K5/053G02B5/3033C08L29/04
Inventor 吕惠霞张军华黎园胡腊梅
Owner CHINA PETROCHEMICAL CORP
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