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An optical polyester film

An optical polyester film and polyester film technology, applied in the field of polyester film, can solve the problems of low yield rate of deep-processed products, poor product appearance, and high production cost, so as to improve the yield rate of semi-finished products and finished products, improve yield rate, The effect of increased compatibility

Active Publication Date: 2021-10-08
HEFEI LUCKY SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide an optical polyester film, which can effectively meet the requirements of liquid crystal display, protection, release and other fields. high-precision requirements, and solve the problems of high production cost, complicated process, poor product appearance and low yield rate of deep-processed products in the existing technology

Method used

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  • An optical polyester film

Examples

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Effect test

preparation example Construction

[0035] The preparation method of modified polyester I is:

[0036] Select film-grade bright polyethylene terephthalate (PET) slices with an intrinsic viscosity of 0.77dl / g~0.87dl / g as the base material, and then mix N,N-bishydroxyethyl lauramide and 2, 6-dihydroxybutyl naphthalate-5-sulfonimide potassium is mixed according to the mass ratio of 1:1~1:6, and sent to the twin-screw extruder together, and then vacuumized, after spinning and cooling , pelletizing and drying to obtain the modified polyester I of the present invention, the intrinsic viscosity of the modified polyester I is 0.66dl / g~0.76dl / g. The modified polyester I of the present invention is prepared by twin-screw extrusion granulation instead of synthesis. The main reason is that the esterification and polycondensation process will destroy polar groups such as dihydroxy groups and affect its effect.

[0037] The preparation method of modified polyester II is:

[0038] ① Add the required dibasic acid, diol, catal...

Embodiment 1

[0050] Preparation of modified polyester I:

[0051] Select film-grade bright polyethylene terephthalate (PET) slices with an intrinsic viscosity of 0.83dl / g as the base material, and then mix N,N-bishydroxyethyl lauramide and 2,6-naphthalene dicarboxylic acid Potassium dihydroxybutyl ester-5-sulfonimide is mixed according to the mass ratio of 1:1, and sent to the twin-screw extruder together, and then vacuumized, and is obtained by spinning, cooling, pelletizing, and drying. The modified polyester I described in the present invention has an intrinsic viscosity of 0.73dl / g.

[0052] Preparation of modified polyester II:

[0053] According to the molar ratio of terephthalic acid and ethylene glycol 1:1.3, the addition amount of ethylene glycol antimony is 180ppm, the addition amount of trimethyl phosphate is 35ppm, and the mass ratio of 1:1 has been dispersed by SG-A1821 and DL-411DF Magnesium acetate whiskers with a diameter of 0.02 μm and a length of 0.5 μm and potassium ti...

Embodiment 2

[0056] Preparation of modified polyester I:

[0057] Select film-grade bright polyethylene terephthalate (PET) slices with an intrinsic viscosity of 0.87dl / g as the base material, and then mix N,N-bishydroxyethyl lauramide and 2,6-naphthalene dicarboxylic acid Potassium dihydroxybutyl ester-5-sulfonimide is mixed according to the mass ratio of 1:1, and sent to the twin-screw extruder together, and then vacuumized, and is obtained by spinning, cooling, pelletizing, and drying. The modified polyester I described in the present invention has an intrinsic viscosity of 0.76dl / g.

[0058] Preparation of modified polyester II:

[0059] According to the molar ratio of terephthalic acid and ethylene glycol 1:1.3, the addition amount of ethylene glycol antimony is 180ppm, the addition amount of trimethyl phosphate is 35ppm, and the mass ratio of 2:1 is satisfied. SG-A1821 and DL-411DF Magnesium acetate whiskers with a diameter of 0.05 μm and a length of 0.5 μm and potassium titanate w...

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Abstract

An optical polyester film, which is co-extruded by a die head, and is produced through casting, longitudinal drawing, transverse drawing, shaping, drawing and winding. After improvement, the optical polyester film adopts A / B / A three-layer structure Co-extruded biaxial stretching process, in which layer A contains polyester I modified by N,N-bishydroxyethyl lauramide and 2,6-dihydroxybutyl naphthalate-5-sulfonylimide potassium , layer B contains polyester II modified by magnesium acetate whiskers and potassium titanate whiskers. The invention increases the dissipating ability of the free charge on the surface of the polyester and improves the yield of deep-processed products; the magnesium acetate whisker and the potassium titanate whisker are respectively modified by the aluminate coupling agent to change the surface groups, It increases the compatibility in polyester resin, ensures uniform dispersion, and can ensure good appearance and high stiffness of cast sheets and film products.

Description

technical field [0001] The invention relates to a film, especially a polyester film. Background technique [0002] As one of the important synthetic materials, polyester (polyethylene terephthalate PET) occupies an important position in industrial production. PET film exists independently as a special form of polyester. It is produced by melt co-extrusion biaxial stretching. Because of its good mechanical properties, thermal properties, electrical insulation and optical properties, it is widely used in packaging, industry, electrical, Electronics, display, protection, explosion-proof and other fields. [0003] There will be many problems in the production or use of polyester film. For example, the friction between two objects of different materials will generate electric charges. In the process, a large amount of charge will be generated. Since the polyester film is an insulator, the generated charges will dissociate on the surface of the polyester film, making the surfac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/36B32B27/06B32B27/20B32B33/00B32B7/023C08K9/04C08K7/08C08L67/02B29C69/02B29K67/00B29L7/00
CPCB29C69/02B29K2067/00B29L2007/00B32B27/08B32B27/20B32B27/36B32B33/00B32B2250/03B32B2250/244B32B2250/40B32B2307/21B32B2457/20B32B7/023C08K7/08C08K9/04C08K2201/014C08L67/02
Inventor 王钦高青周通鲍时萍宋瑞然
Owner HEFEI LUCKY SCI & TECH IND
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