TPEE composite material suitable for high-speed extrusion and preparation method thereof

Abstract

The invention belongs to the technical field of polymer composite materials, and particularly relates to a TPEE composite material suitable for high-speed extrusion and a preparation method thereof. The TPEE composite material suitable for high-speed extrusion is prepared from the following raw material components in percentage by mass: 60 to 90 percent of a thermoplastic polyester elastomer A, 6 to 30 percent of a thermoplastic polyester elastomer B, 1 to 10 percent of polyethylene terephthalate, 0.1 to 2 percent of a high-speed extrusion accelerant, 0.1 to 0.5 percent of a copper inhibitor and 0.1 to 0.5 percent of an antioxidant. Through reasonable compatibility of thermoplastic polyester elastomers with different molecular weights, the TPEE substrate material with bimodal molecular weight distribution is formed, the thermoplastic polyester elastomer A with high molecular weight provides good mechanical properties and environmental stress cracking resistance, the thermoplastic polyester elastomer B with low molecular weight provides good processability, a small amount of the PET is added to serve as in-situ fiber forming resin, a good microfiber structure is formed in the high-speed extrusion process, and the stability of melt in high-speed extrusion is improved.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a TPEE composite material suitable for high-speed extrusion and a preparation method thereof. Background technique [0002] With the vigorous development of the consumer electronics industry in recent years, the market for consumer electronics cables is gradually expanding, and the demand for core wire materials is also rising. Thermoplastic polyester elastomer (TPEE) material has good insulation and mechanical properties, and its heat resistance, low temperature bending resistance and bending fatigue resistance are all due to polyolefin resin, so it has a role in consumer electronics core wire coating materials. important application. [0003] TPEE material is a linear block copolymer composed of crystalline polyester hard segment and amorphous polyether or polyester soft segment, which has both the elasticity of rubber and the strength of engine...

AI Technical Summary

Problems solved by technology

For the thin-walled high-speed extrusion processing of the core wire jacket, the unmodified domestic TPEE material can only be produced at an extrusion speed of about 200m / min. Once the extrusion speed exceeds 300m / min, the melt will appear abnormal. Stable, causing numbness or melt fracture on the surface of the extruded core wire, which cannot meet the requirements of more efficient production

Images