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

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...

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