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Black light shielding master batch, black light shielding polyester film and preparation method

A light shielding and black technology, applied in the field of polymer materials, can solve the problems of non-uniform light shielding performance of films, irregular aggregation of black pigment particles, influence of film gloss and flatness, etc., to improve light shielding performance and tinting strength and high coverage at an affordable price

Active Publication Date: 2021-03-30
HANGZHOU NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, this kind of coating is prone to orange peel or shrinkage during curing or drying molding, resulting in random aggregation of black pigment particles, resulting in uneven light shielding properties of the final film, and poor gloss and flatness of the film. affected; on the other hand, the problem of uniform dispersion of black pigments in the paint substrate also needs to be solved

Method used

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  • Black light shielding master batch, black light shielding polyester film and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Preparation of black light shielding masterbatch:

[0053] (1) Add 0.14kg bis-(γ-triethoxysilylpropyl)tetrasulfide and 0.06kgγ-mercaptopropyltrimethoxysilane to a mixture of 9kg ethanol and 0.8kg water, stir and adjust with acetic acid The pH value of the mixed solution was 5.1 to obtain a coupling agent mixed solution. Add 89.9kg of high-pigment furnace black (average particle size 32 nanometers) and 10kg carbon fiber (7 microns in diameter, 30 microns in length) into a high-speed mixer (5000 rpm), spray 5kg of sprayed coupling agent mixture, Mix at a high speed for 35 minutes at 70° C., then heat up to 115° C. and mix at a high speed for 80 minutes, and discharge to obtain a modified black additive.

[0054] (2) Mix 30kg of the modified black additive and 70kg of polyester evenly, extrude, pelletize and slice, and extrude and pelletize into slices in a co-rotating parallel twin-screw extruder at 275°C±5°C to obtain black light-shielding masterbatch.

[0055] Prepara...

Embodiment 2

[0058] Preparation of black light shielding masterbatch:

[0059] (1) Add 0.35kg of bis-(γ-triethoxysilylpropyl) tetrasulfide and 0.15kg of γ-mercaptopropyltrimethoxysilane to a mixture of 7.5kg of ethanol and 2kg of water, stir and adjust with acetic acid The pH of the mixture was 5.1. Add 89.9kg of high-pigment furnace black (average particle diameter of 32 nanometers) and 10kg of carbon fibers (7 microns in diameter, 30 microns in length) into a high-speed mixer (5000 rpm), and spray 2 kg of misty alcohol containing a coupling agent. The water mixture was mixed at a high speed of 60°C for 30 minutes, then heated to 110°C and mixed at a high speed for 60 minutes, and discharged to obtain a modified black additive.

[0060] Step (2) and the preparation of the black light-shielding polyester film were the same as in Example 1, and the process was the same to prepare a black light-shielding polyester film (thickness: 18 microns).

Embodiment 3

[0062] Preparation of black light shielding masterbatch:

[0063] (1) Add 0.07kg bis-(γ-triethoxysilylpropyl)tetrasulfide and 0.03kgγ-mercaptopropyltrimethoxysilane to the mixture of 9.5kg ethanol and 0.4kg water, stir and wash with acetic acid Adjust the pH of the mixture to 5.1. Add 89.9kg of high-pigment furnace black (average particle diameter of 32 nanometers) and 10kg of carbon fibers (7 microns in diameter, 30 microns in length) into a high-speed mixer (5000 rpm), and spray 10 kg of misty alcohol containing a coupling agent. The water mixture was mixed at a high speed for 50 minutes at 70° C., then heated to 120° C. and mixed at a high speed for 120 minutes, and discharged to obtain a modified black additive.

[0064] Step (2) and the preparation of the black light-shielding polyester film were the same as in Example 1, and the process was the same to prepare a black light-shielding polyester film (thickness: 18 microns).

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Abstract

The invention relates to the technical field of high polymer materials, and discloses a black light shielding master batch, a black light shielding polyester film and a preparation method thereof. Theblack light shielding master batch is prepared from, by mass, 60%-80% of polyester and 20%-40% of modified black additive; the modified black additive is prepared from the following raw material components, by mass: 84.9-94.92% of carbon black, 5-15% of carbon fiber, and 0.08%-0.1% of a coupling agent; master batch is obtained through melt blending, and then black light shielding polyester film is prepared through polyester melt blending, die head casting, longitudinal drawing, transverse drawing and winding forming; the black light shielding polyester film with uniform optical performance, high tensile strength and good dimensional stability is obtained by utilizing the synergistic effect of the carbon black, the carbon fibers and the coupling agent, and the preparation method is simpleto operate and easy to control. The production efficiency is high; and the black light shielding master batch is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a black light-shielding masterbatch, a black light-shielding polyester film and a preparation method thereof. Background technique [0002] Polyester film after biaxial stretching has the advantages of high tensile strength, excellent gas barrier properties, dimensional stability and good heat resistance, and can be widely used in many fields such as photovoltaic materials, liquid crystal displays, food packaging, and glass protection. Among them, optical-grade polyester film is the product with the highest requirements in various performance indicators. Due to the display use and design requirements of the liquid crystal display, a layer of black light-shielding polyester film is required to be attached to the light-shielding area at the front of the display light source to prevent light leakage at the edge and local areas. The light shielding film has zero light tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K3/04C08K7/06C08K9/06C08J3/22C08J5/18
CPCC08J3/226C08J5/18C08K2201/011C08K2201/003C08K2201/004C08J2367/02C08J2467/02C08K3/04C08K7/06C08K9/06C08K2201/016
Inventor 胡培隆周箭颜孙赛欧阳南平
Owner HANGZHOU NORMAL UNIVERSITY
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