Sheath material with high tearing strength and high flame retardance and preparation method thereof

Abstract

The invention provides a high-tear-strength and high-flame-retardant sheath material, which is prepared from the following raw materials in percentage by mass: 18 to 35 percent of styrene thermoplastic elastomer, 15 to 30 percent of polyolefin resin, 0 to 10 percent of plasticizer, 8 to 14 percent of polyphenyl ether resin, 25 to 36 percent of phosphorus-nitrogen flame retardant, 1 to 2 percent of cross-linking agent diluent, 0.1 to 1 percent of antioxidant, 0.5 to 1.5 percent of anti-aging agent, and 0.5 to 2 percents of a processing aid. The sheath material provided by the invention has high tearing strength and high flame retardance, and the use safety of consumer electronic cables such as data lines is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of macromolecules, and relates to a sheath material with high tear strength and high flame retardancy and a preparation method thereof. Background technique [0002] With the upgrading of consumer electronic equipment, the charging speed is getting faster and faster, and the subsequent safety hazards are also increasing. In this regard, major consumer electronics manufacturers are paying more and more attention to the outer covering materials of consumer electronics cables such as data cables. , the requirements are getting higher and higher. [0003] Styrene thermoplastic elastomer (TPE) has light specific gravity, easy processing, good elasticity, high strength, comfortable hand feeling, good high and low temperature resistance, excellent weather resistance, and does not contain halogen and o-phthalmic plasticizers, and can be recycled. Used in the field of consumer electronics, such as data lines, power ...

AI Technical Summary

Problems solved by technology

However, TPE material belongs to non-polar olefin structure, and the crystallinity is very low. In addition, in order to improve the processing performance and softness of TPE, a large amount of plasticizer white oil will be added, which greatly weakens the force between molecular chains. , leading to low tear strength of TPE material

For data lines with very strict flame retardant requirements, a large amount of flame retardant filling is inevitable, which further deteriorates the tear strength of TPE. In addition, the data line sheath is relatively thin. If there is a small damage to the surface of the TPE material, frequent use During the process, the stress is concentrated on the damaged part, which is easy to expand into a large crack, causing the data cable to crack, affecting the use of consumers and even causing accidents

The cracking of halogen-free flame-retardant TPE data lines occurs in large numbers every year, but unfortunately, the current improvement of the tear strength of halogen-free flame-retardant TPE materials is not ideal

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