PBT reclaimed material and preparation method thereof

Abstract

The invention relates to a PBT reclaimed material and a preparation method thereof. The PBT reclaimed material comprises the following components in percentage by mass: 80-95% of a PBT reclaimed material, 1-10% of compound fibers, 1-10% of a filler, 1-3% of a flame retardant, 0.3-0.6% of a chain extender and 0.2-0.4% of an end-capping reagent, wherein the compound fibers are glass fibers / TiO2 / ramie fibers. The preparation method comprises the following steps: S1, putting the PBT reclaimed material, the compound fibers, the filler and the flame retardant into a stirrer, and conducting uniform stirring to obtain stirred materials; S2, conveying the stirred materials into an extruder through a feeding machine for mixing, and extruding the mixed materials through a steel mesh at the head of the extruder to obtain an extruded material; S3, cooling the extruded material through a water tank, and then dehydrating the extruded material through a water absorption machine to obtain a cooled material; S4, granulating the cooled material by using a granulator, and carrying out screening treatment to obtain a finished product; and S5, blowing the finished product to a post-mixing machine through a blowing machine, performing uniform mixing, and conveying an obtained mixture to a material storage cylinder for storage. The PBT reclaimed material produced by the invention has good high-temperature crimp resistance.

Description

technical field [0001] The invention relates to the technical field of plastic products, in particular to a PBT regenerated material and a preparation method thereof. Background technique [0002] PBT is polybutylene terephthalate, also known as polytetramethylene terephthalate. PBT is a polycondensate of terephthalic acid and 1,4-butanediol. It is a milky white translucent to opaque, crystalline thermoplastic polyester. PBT recycled material has good heat resistance, toughness, fatigue resistance, low friction coefficient and weather resistance, etc. Its water absorption rate is low, only 0.1%, and it still maintains various physical properties (including electrical properties) in a humid environment. Recycled materials have good properties. PBT recycled materials are prepared from PBT recycled materials as the main material. The use of PBT recycled materials can not only save production costs, improve the company's economic benefits, but also conform to the green economi...

AI Technical Summary

Problems solved by technology

However, when the glass fiber-modified PBT recycled material is applied in a high-temperature environment, its longitudinal and transverse shrinkage rates are different, and warpage is prone to occur.

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