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Single-sided or double-sided optical hardened polyester film and preparation method thereof

A polyester film, single-sided technology, applied in the field of touch display, can solve the problems of complex production and processing of optically hardened polyester film, low light transmittance, environmental impact, etc. sexual effect

Active Publication Date: 2014-12-24
四川东方绝缘材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, especially the complex production and processing of optically hardened polyester films for touch screens, environmental impact, low light transmittance, etc. One-sided or double-sided optically hardened polyester film with good performance and its preparation method

Method used

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  • Single-sided or double-sided optical hardened polyester film and preparation method thereof
  • Single-sided or double-sided optical hardened polyester film and preparation method thereof
  • Single-sided or double-sided optical hardened polyester film and preparation method thereof

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preparation example Construction

[0039] Preparation of Part 1 Hardening Resin Coating Solution

[0040] Basic process: In a preparation container that can be weighed, add 25 to 75 parts by weight of an aqueous emulsion containing 40% polyurethane acrylate under stirring, and after stirring for 30 minutes, add a very small amount of pH regulator N,N-dimethyl Base ethanolamine, make the pH=9.5 that contains 40% urethane acrylate aqueous emulsion, add 1~8 weight part nano-silica sol, 0.5~2 weight part surfactant, 0.1~1 weight part leveling agent, 0.1~ 0.5 parts by weight of defoamer, 1 to 10 parts by weight of photoinitiator, 0.1 to 1.2 parts by weight of anti-yellowing agent, and finally add 5 to 15 parts by weight of reactive diluent, and then add deionized water until the total material reaches 120 parts by weight, and again A very small amount of N,N-dimethylethanolamine was added dropwise to adjust the pH to 9.5, and then stirred for 30 minutes to obtain a hardened resin coating solution with a viscosity of...

Embodiment 1

[0042] Formula 1 of the hardened resin coating solution of the present invention (the 1# hardened resin coating solution has a viscosity of 48mPa·s at 25°C):

[0043]

Embodiment 2

[0045] Formula 2 of the hardened resin coating solution of the present invention (the 2# hardened resin coating solution has a viscosity of 51 mPa·s at 25°C):

[0046]

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Abstract

The invention discloses a single-sided or double-sided optical hardened polyester film and a preparation method thereof. The optical hardened polyester film is composed of a base film, and one or two hardened resin coatings, which are applied to and cured on the single surface or the double surfaces of the base film, wherein the base film thickness is 100-250 microns, and the surface coating thickness is 1-10 microns. The preparation method comprises the following steps: melting and casting a polyester chip through an extruder, longitudinally stretching the polyester chip to form a thin blank, coating the single or double surfaces of the thin blank with hardened resin coating liquid in an online coating mode, drying, horizontally stretching, and thermally forming to obtain the base film with the hardened resin coating liquid coatings, curing through ultraviolet light to obtain the single-sided or double-sided optical hardened polyester film, wherein the hardened resin coating liquid is composed of aqueous emulsion containing 40% of polyurethane acrylate, nanometer silicon sol, a surfactant, a flatting agent, a defoaming agent, photoinitiator and a yellow-resistant agent. The hardened polyester film prepared by the one-step method is suitable for the field of touch displays.

Description

technical field [0001] The invention belongs to an optical surface hardened film and its manufacture, and relates to a single-sided or double-sided (or called single / double-sided) optically hardened polyester film and a preparation method thereof. The invention adopts the prepared coating glue (that is, the hardening resin coating liquid) to process single-side or double-side molding surface hardening polyester film in one step, and the prepared optical hardening polyester film is especially suitable for the field of touch display. Background technique [0002] With the popularity of large touch screens and flexible displays, display screens are widely used in various fields, and during use, hardened polyester film is an indispensable material to prevent scratches on the display screen. Now it is mainly used to coat an ultraviolet (UV) curing resin on the optical polyester film to make it have a certain hardness, so as to protect the screen. But existing technology has foll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/36B32B27/40B32B37/15B32B38/16
Inventor 李明勇韩崇涛王明李建学
Owner 四川东方绝缘材料股份有限公司
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