Brown colorant for water Teflon high-temperature cloth and preparing method thereof

Abstract

The invention discloses a brown colorant for water Teflon high-temperature cloth and a method for preparing the brown colorant. The brown colorant is composed of a high-temperature resisting pigment, polytetrafluoroethylene, a functional additive agent, a dispersing wetting agent and deionized water. The materials comprise, by weight percent, 35 to 50 percent of the high-temperature resisting pigment, 10 to 20 percent of the polytetrafluoroethylene, 5 to 10 percent of the functional additive agent, 2 to 20 percent of the dispersing wetting agent, and the balance of deionized water. The brown colorant can be prepared through mixing and grinding all the constituents and implementing quality test, vacuum defoamation and filtering packing. The brown colorant for the water Teflon (PTFE) high-temperature cloth by the method is characterized by long storage stability, good temperature resistance (reaching to more than 400 DEG C), excellent chemical resistance, bright color, good compatibility with PTFE emulsion and high color intensity. The grain diameters can realize that D99 is less than or equal to 5 microns (namely, the average diameter of 99 percent of the grains is less than or equal to 5 microns), and the brown colorant and the method conform to national environmental requirements because the deionized water is taken as base material. The brown colorant has the advantages of simple preparation process, low preparation cost and easy industrialized production.

Description

technical field [0001] The invention relates to a water-based coffee color paste, in particular to a water-based Teflon high-temperature cloth coffee color paste and a preparation method thereof. Background technique [0002] Teflon (PTFE) is a fluorine-containing material with very low surface polarity and easy adhesion. It has excellent chemical resistance, a dielectric constant of 2.1, a low dissipation factor, and high stability over a wide temperature and frequency range. Its tensile strength, wear resistance and creep resistance are worse than other engineering plastics. Fiberglass, carbon and graphite are added to improve its special mechanical properties. It has a lower coefficient of friction than almost any other material and a high oxygen index, making it extremely versatile. [0003] Its applications are mainly in the fields of conveyor belts, electrical tapes, industrial tapes, food-grade baking sheets, and special high-temperature building molding materials....

AI Technical Summary

Problems solved by technology

And the system contains a lot of organic solvents. Ordinary pigments are easy to change color and decompose when the temperature exceeds 200°C, resulting in different local temperatures, large color differences, and even blackening. The production cannot be controlled; on the other hand, The surface polarity of Teflon (PTFE) is very low, and it is difficult for ordinary colorants to be compatible with PTFE emulsions. At the same time, the resistance to chemical media and the brightness of colors cannot meet the requirements.

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