PBT (Polybutylece Terephthalate) plastic used for automotive interiors and preparation method thereof

Abstract

The invention discloses PBT (Polybutylece Terephthalate) plastic used for automotive interiors and a preparation method thereof. The PBT (Polybutylece Terephthalate) plastic used for the automotive interiors comprises the following components in parts by weight: 200 parts of PBT resin, 10-60 parts of glass fibers, 1-5 parts of composite antibacterial agent and 0.5-2 parts of dispersing agent, wherein the composite antibacterial agent consists of an organic antibacterial agent and an inorganic antibacterial agent, and the weight ratio of the organic antibacterial agent to the inorganic antibacterial agent is 1:(1-1.4). The preparation method comprises the following steps of: weighing various raw materials according to the ratio, and uniformly mixing; and then melting, mixing, extruding and pelletizing to obtain the PBT plastic. The PBT plastic used for the automotive interiors has an efficient, sustainable, broad-spectrum and safe antibacterial effect, and meanwhile, the parameters of good tensile strength, flexural modulus, cantilever beam notch impact strength and the like are maintained, so that the PBT plastic can be easily processed into various shapes of automotive interiors by using an injection molding process, such as glove box inner cover plates, glove box hoppers, auxiliary instrument board bodies, storage box gaskets and panel storage boxes.

Description

technical field [0001] The invention relates to a plastic material and a preparation method thereof, in particular to an antibacterial PBT plastic for automotive interior parts and a preparation method thereof. Background technique [0002] PBT resin, the Chinese name is polybutylene terephthalate, the English name is polybutylene terephthalate (referred to as PBT), which belongs to the polyester series and is composed of 1,4-butanediol (1.4-Butylene glycol) and terephthalic acid (PTA) or terephthalate (DMT) polycondensation, and a milky white translucent to opaque, crystalline thermoplastic polyester resin made through a mixing process. Together with PET, it is collectively referred to as thermoplastic polyester, or saturated polyester. [0003] PBT resin has high heat resistance, toughness, fatigue resistance, self-lubricating, low friction coefficient, weather resistance, low water absorption, only 0.1%, and maintains various physical properties (including electrical pro...

AI Technical Summary

Problems solved by technology

[0006] However, the improvement of the resistance of PBT resin is more difficult than the antibacterial of non-polar plastics such as polypropylene and polyethylene.

At present, antibacterial agents are divided into inorganic antibacterial agents and organic antibacterial agents. Among inorganic antibacterial agents, the effect of silver-based antibacterial agents is better than that of copper-based antibacterial agents, and the effect of copper-based antibacterial agents is better than that of zinc-based antibacterial agents. In the case of inorganic antibacterial agents, due to the active chemical properties of silver ions and sensitivity to light and heat, it is easy to cause discoloration of plastics; the use of non-silver inorganic antibacterial agents such as zinc and copper is not easy to change color, but the antibacterial effect is low and the amount of use is large; Using organic antibacterial agents, due to the relatively high processing temperature of PBT, it is easy to cause the decomposition of organic antibacterial agents, and some antibacterial agents made of organic synthetic compounds are prone to produce toxic by-products and have low safety performance

Therefore, the antibacterial PBT plastics currently used generally have disadvantages such as poor heat resistance, uneven dispersion of antibacterial agents, and short duration of antibacterial effects.

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