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A kind of highly transparent antistatic PET polyester film and preparation method thereof

A polyester film and antistatic technology, which is applied in the field of polyester film and its preparation, can solve the problems of thin antistatic layer, increased cost, and time limit of antistatic performance, so as to improve antistatic performance and antistatic performance , high transparency effect

Active Publication Date: 2016-01-13
HANGZHOU HUASU IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But to play a better antistatic effect, the addition of this whisker must reach 15wt%, which will not only affect the mechanical strength and transparency of the polyester film, but also greatly increase the cost.
[0004] Surface coating method Because the antistatic agent only stays on the surface of the polyester film, the antistatic layer will become thinner and thinner due to friction and other reasons after long-term use, and finally lose the antistatic performance
The antistatic performance of the antistatic film produced by the surface coating method is limited by the use time, and the surface coating will also affect the transparency of the polyester film

Method used

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  • A kind of highly transparent antistatic PET polyester film and preparation method thereof
  • A kind of highly transparent antistatic PET polyester film and preparation method thereof

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preparation example Construction

[0029] The preparation method of PET polyester film of the present invention comprises the following steps:

[0030] 1) Perform block copolymerization of terephthalic acid, ethylene glycol and polyether, and process the obtained copolymer through twin-screw extrusion granulation to obtain antistatic masterbatch, which is an antistatic agent;

[0031] 2) Vacuum-dry the PET polyester chips and antistatic masterbatch, remove the water, take the antistatic masterbatch and PET polyester chips and mix them evenly, and then add antioxidants to mix, wherein the antistatic masterbatch, PET polyester chips and antistatic The composition ratio of oxygen agent is 1~5:95~99:0.1;

[0032] 3) The mixture obtained in step 2) is extruded into a thick film through twin-screw, and the thick film is shaped after biaxial stretching to obtain the highly transparent and antistatic PET polyester film.

[0033] Preferably, the temperature in the twin-screw extrusion process in step 3) is 260-280°C, a...

Embodiment 1

[0045] Copolymerize terephthalic acid, ethylene glycol and PEG1000 to synthesize PET-b-PEG1000 block copolymer, and the content of PEG1000 in the copolymer is 35wt%. The obtained block copolymer is subjected to twin-screw extrusion and granulation to obtain an antistatic masterbatch, which is an antistatic agent. Vacuum dry PET polyester chips and antistatic masterbatch to remove moisture. Take 3 parts of antistatic masterbatch, 97 parts of PET polyester chips, and 0.1 part of antioxidant 1010 and mix them. The mixture is extruded into a thick film through twin-screw. The extrusion temperature of the screw was 260°C, and the temperature of the roller was 70°C. After the obtained thick film was biaxially stretched, it was fixed at 120° C. for 3 minutes to obtain an antistatic film.

Embodiment 2

[0047] Copolymerize terephthalic acid, ethylene glycol and PEG1000 to synthesize PET-b-PEG1000 block copolymer, and the content of PEG1000 in the copolymer is 35wt%. The obtained block copolymer is subjected to twin-screw extrusion and granulation to obtain an antistatic masterbatch, which is an antistatic agent. Vacuum dry PET polyester chips and antistatic masterbatch to remove moisture. Take 2 parts of antistatic masterbatch, 98 parts of PET polyester chips, and 0.1 part of antioxidant 1010 and mix them. The mixture is extruded into a thick film through twin-screw. The extrusion temperature of the screw was 270°C, and the temperature of the roller was 75°C. After the obtained thick film was biaxially stretched, it was fixed at 130° C. for 4 minutes to obtain an antistatic film.

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Abstract

The invention discloses a high transparent anti-static PET (polyethylene terephthalate) polyester thin film and a preparation method thereof. The high transparent anti-static PET polyester thin film comprises the following components: PET, an anti-static agent and an antioxidant at a mass ratio of (95-99):(1-5):0.1. Block copolymerization is carried out on terephthalic acid, ethylene glycol and polyether, and the obtained copolymer is subjected to twin-screw extrusion pelletizing, so that an anti-static master batch, namely the anti-static agent, is prepared; a PET polyester is chipped, the anti-static master batch is subjected to vacuum drying, the anti-static master batch and the PET polyester chips are uniformly mixed, the antioxidant is added and mixing is carried out; then a thick film is obtained by virtue of twin-screw extrusion, and the thick film is subjected to two-way stretching and then is sized, so that the high transparent anti-static thin film is obtained. The PET polyester thin film has the advantages that the anti-static function of the thin film is improved, the surface resistance of the PET polyester thin film can be reduced to 108-1010 ohm, and high transparency is also maintained; by adopting the anti-static master batch, a long-time and stable anti-static function can be played.

Description

technical field [0001] The invention relates to a polyester film and a preparation method thereof, in particular to a highly transparent and antistatic PET polyester film and a preparation method thereof. Background technique [0002] Because of its stable size, good mechanical strength and optical properties, PET polyester film is widely used in packaging materials, optical equipment, and electrical appliances, and has a huge market. However, due to its molecular characteristics, the polyester film has poor electrical conductivity, and its general surface resistance is 10. 14 -10 16 Ω. PET polyester film is easily charged with static electricity due to friction during processing and handling, and because of the high surface resistance, the static charge will stay on the surface of the polyester film for a long time. This limits the use of PET polyester film in some electrical and electronic equipment and other fields that require high electrostatic protection. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L67/00C08K5/134C08J5/18
Inventor 倪旭峰郑武义陈立锋金双林章少华孙江华王水发喻国梁
Owner HANGZHOU HUASU IND
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