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Anti-fog polyester film and preparation method thereof

A polyester film, anti-fog technology, applied in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of thick thickness and poor thermal stability, and achieve thin thickness, good thermal stability, The effect of high transparency

Active Publication Date: 2012-11-28
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the defects that the existing anti-fog film products are relatively thick, and have poor thermal stability, and are difficult to apply in high-temperature and high-humidity environments, the present invention provides an anti-fog polyester film and its preparation method

Method used

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  • Anti-fog polyester film and preparation method thereof
  • Anti-fog polyester film and preparation method thereof
  • Anti-fog polyester film and preparation method thereof

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preparation example Construction

[0041] The preparation method of anti-fog polyester film provided by the invention comprises the steps:

[0042] (1) Mix the raw materials of the functional layer, pre-crystallize at 120-140°C, the pre-crystallization time is 10-20min; dry at 175-180°C, the drying time is 4-6h;

[0043] (2) Mix the raw materials of the polyester base material, pre-crystallize at 120-140°C, the pre-crystallization time is 10-20min; dry at 175-180°C, the drying time is 4-6h.

[0044](3) Melt and extrude the functional layer raw material obtained in step (1) through a twin-screw extruder. The temperature of each zone is set as follows: 265°C for the first zone, 270°C for the second zone, 275°C for the third zone, and 275°C for the fourth zone. The fifth zone is 275°C, the temperature of the machine head: 270°C; at the same time, the polyester substrate raw material obtained in step (2) is melted and extruded through a single-screw extruder, and the temperature of each zone is set as follows: the ...

Embodiment 1

[0058] 100 parts of polyester chip raw materials, kneading in a mixer, adding 1.5 parts of nonylphenol polyoxyethylene ether, 0.2 parts of polyvinyl alcohol, the mixture is used as the raw material of the anti-fog functional layer; the polyester base material is 20% pure resin Chips and 80% recycled polyester chips. A film with a thickness of 75 micrometers was prepared, wherein the thickness of the anti-fog functional layer was 10 micrometers, and the thickness of the polyester substrate was 55 micrometers.

Embodiment 2

[0060] 100 parts of raw materials for polyester chips, kneading in a mixer, adding 1.5 parts of nonylphenol polyoxyethylene ether and 0.3 parts of polyvinyl alcohol, the mixture is used as the raw material for the anti-fog functional layer; the polyester substrate is 20% pure resin Chips and 80% recycled polyester chips. A film with a thickness of 75 microns was prepared, wherein the anti-fogging functional layer was 10 microns, and the polyester substrate was 55 microns.

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Abstract

The invention relates to the technical field of functional polyester film, particularly relates to an anti-fog polyester film and a preparation method thereof, for solving the problems of thick thickness, bad thermostability, difficulty in applying in high-temperature high-humidity environment in existing anti-fog films. The anti-fog polyester film disclosed herein comprises a polyester base material, wherein the two sides of the base material is provided with anti-fog function layers, the polyester base material is a pure polyester layer, the material of the anti-fog function layers comprises 100 parts of polyester slices, 0.5-2.0 parts of anti-fogging agent, and 0.1-0.5 parts of synergist. The film disclosed herein has good transparency, good machining property, thin thickness, good thermostability, and good anti-fog performance, and can be applied in high-temperature high-humidity environment. The preparation method of the film is simple and easy to operate.

Description

technical field [0001] The invention relates to the technical field of functional polyester films, in particular to an anti-fog polyester film and a preparation method thereof. Background technique [0002] In a high-temperature, high-humidity environment, or on two interfaces with a relatively large difference in temperature and humidity, tiny water droplets will precipitate on the interface to form a misty water film. For example, in a working environment where a safety mask is required, a foggy water film is often formed on the mask, which affects work efficiency. In view of this situation, in the prior art, a technology of extrusion casting non-crystalline polyethylene terephthalate (APET) sheet and coating an anti-fog layer on the surface of APET is usually adopted. The thickness of the APET sheet extruded by this method is relatively thick, and it is difficult to make a thinner product, such as a product with a thickness of less than 100 microns; in addition, the ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/18B32B27/36B29C69/02
Inventor 不公告发明人
Owner NINGBO CHANGYANG TECH
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