150°C heat-resistant cross-linked low-smoke halogen-free electronic wire material and manufacturing method thereof

Abstract

The invention discloses a 150 DEG C heat-resistant crosslinked low-smoke halogen-free electronic wire material and a preparation method thereof and aims to solve the problem that in order to achieve a certain flame-retardant effect, the usage of inorganic filler in an existing wire and cable insulating material exceeds 50% universally, so that the mechanical property is not good enough, particularly, the flexibility of the electronic wire material is affected as the elongation at break is relatively low. The key point of the technical scheme is as follows: the material comprises the following components in parts by weight: 20-40 parts of EVA, 5-10 parts of PE, 1-5 parts of grafted PE, 30-65 parts of inorganic filler, 0.2-1.8 parts of an antioxidant, 0.2-1.8 parts of a crosslinking agent and 0.2-1.8 parts of a plasticizer. By adopting the formula, the flame retardance of the electronic wire material is improved, the elongation at break of the electronic wire material is improved, and the mechanical property of the electronic wire material is ensured.

Description

technical field [0001] The invention relates to the field of electronic wire materials for special cables, in particular to 150°C heat-resistant cross-linked low-smoke and halogen-free electronic wire materials and a manufacturing method thereof. Background technique [0002] With the rapid development of the economy, wires and cables are widely used in various industries and fields. With the frequent occurrence of electrical fire accidents, the flame retardant problem of wires and cables has gradually attracted the attention of countries all over the world. When the cable burns, it releases a large amount of smoke and toxic and corrosive gas, which is a risk factor in a fire. It hinders people's safe evacuation and fire fighting work during a fire, causing serious loss of life and property. At the same time, with the development of the communication industry, the automobile industry and the computer industry, especially in many occasions such as aviation wires, automobile ...

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Problems solved by technology

Moreover, its elongation at break and elongation under load have been improved to a certain extent, but for some occasions with special requirements on flexibility, its elongation at break and elongation under load still cannot meet the requirements

[0006] It can be seen from the above published documents that in order to achieve a certain flame retardant effect, the amount of inorganic fillers currently used in wire and cable insulation materials generally exceeds 50%, which brings about the problem that the mechanical properties are not good enough

Wang Yongchang and others also published the article "Research on Irradiation Cross-linked Halogen-free, Low Smoke, High Temperature and Flame Retardant Polyolefin Cable Materials" at the 9th Yangtze River Delta Science and Technology Forum Radiation Processing Sub-forum and 2012 Yangtze River Delta Radiation Federation. It is clearly pointed out that in order to make the material have obvious flame retardant effect without the use of auxiliary flame retardants, the content of magnesium hydroxide must reach more than 50%, but with the increase of magnesium hydroxide content, the tensile strength and elongation at break The rate decreases rapidly, especially when the magnesium hydroxide content is greater than 50%, the tensile strength and elongation at break have been unable to meet the requirements of practical applications.

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