Polyester used for plates and preparing method thereof

Abstract

The invention discloses polyester used for plates and a preparing method thereof. Raw materials of the polyester comprise, based on the theoretical weight of the polyester, terephthalic acid, ethylene glycol, 5-20 wt% of a dicarboxylic acid except the terephthalic acid, 1-5 wt% of diol, 0.002-0.006 wt% of a polyol compound, 0.01-0.1 wt% of a hydrophilic modification agent and 0.01-0.03 wt% of a heterogeneous inorganic substance. The polyester is used for extrusion molding of the plates. After molding, the plates have good post processing performance such as subsequent plastic vacuum forming, is advantaged by moisture resistance, static electricity resistance, high transparency, high impact strength, high heat deflection temperature, and the like, and can partially replace ABS for wide applications in cases, hand plate manufacturing, electronic and electric products, and other fields.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular, the invention relates to a modified polyester used for boards and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (referred to as PET) has the greatest strength and toughness among thermoplastics, maintains excellent physical and mechanical properties in a wide temperature range, friction resistance, high rigidity, high hardness, and good dimensional stability , Stable to most organic solvents and inorganic acids. In recent years, the application of PET in the non-fiber field has grown rapidly. However, due to the low crystallization rate of PET, it is difficult to form and process, the molding temperature is high, the production cycle is long, the impact resistance is poor, and the processability is not good. Therefore, PET needs to be modified. Generally, physical modification methods such as reinforcement, filling and blending w...

AI Technical Summary

Problems solved by technology

Many patents use polyethylene glycol to participate in copolymerization to improve hydrophilicity and apply it to fiber spinning. There is no report on the application of copolyester to extruded sheet

On the other hand, the addition of polyethylene glycol can effectively improve the hydrophilicity and antistatic properties of polyester fibers, but polyethylene glycol is unstable and easily degrades at high temperatures, especially in post-processing. A large amount of irritating gas is produced, which affects the product quality on the one hand, and causes serious pollution to the processing environment on the other hand.

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