Polyester film for thermal dye sublimation transfer printing ribbon and preparation method of polyester film

Abstract

The invention relates to a polyester film for a thermal dye sublimation transfer printing ribbon. The polyester film comprises the following raw materials in parts by mass: 30-50 parts of film-grade bright polyester chips and 30-50 parts of film-grade polyester master batch, and the film-grade polyester master batch is obtained by copolymerizing polybasic acid and polyhydric alcohol, and the film-grade master batch contains silicon dioxide nanoparticles with fluorinated and modified surfaces. The problem that the heat resistance and the optical property of the polyester film are difficult to balance is solved, and the polyester film which is low in haze, high in glossiness, few in defect and excellent in mechanical property and heat resistance is obtained by performing surface fluorination modification on the added nano silicon dioxide particles and optimizing raw materials and a process during polyester synthesis.

Description

technical field [0001] The invention belongs to the field of polyester, and in particular relates to a polyester film for thermal sublimation transfer printing ribbon and a preparation method thereof. Background technique [0002] Ordinary inkjet printing can only carry a single color ink, usually a black and white printing ribbon, the effect is single, and the printing quality is average. The polyester film used for the sublimation transfer ribbon can carry the three primary colors of yellow, red and blue. After the sublimation printing technology, a variety of colors and color depths can be achieved through the matching of the three colors, and high photo printing quality can be achieved. The key to the quality of the sublimation transfer ribbon is the polyester film as the base film. The polyester film is required to have good mechanical strength, optical properties, and insulation properties at a thickness of 4.5 μm. In order to improve the properties of polyester mate...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the poor comprehensive performance of the polyester film used in the sublimation transfer ribbon in the prior art, especially the problem that the heat resistance and optical properties are difficult to balance, the present invention improves the surface fluorination of the added nano-silica particles. properties, as well as the optimization of raw materials and processes during polyester synthesis, a polyester film with low haze, high gloss, few defects, and excellent mechanical properties and heat resistance was obtained.

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