Insulating sheath material for internal connecting cable of electrical equipment and preparation method of the insulating sheath material

The invention relates to an insulating sheath material for an internal connecting cable of electrical equipment and a preparation method of the insulating sheath material. The material is prepared from the following raw materials in parts by weight: 30-70 parts of ethylene-vinyl acetate copolymer, 10-40 parts of ultra-low density polyethylene, 5-20 parts of maleic anhydride grafted copolymer elastomer, 3-10 parts of silicone master batch, 30-70 parts of magnesium hydroxide, 2-6 parts of hydroxyethylidene diphosphonate, 2-6 parts of zinc borate, 1-2 parts of polysiloxane, 1-4 parts of lubricant, 0.5-2 parts of irradiation crosslinking aid, and 0.3-2 part of composite antioxidant. The insulating sheath material for the internal connecting cable of the electrical equipment has good low-temperature resistance, environmental stress cracking resistance and aging resistance, and is low-smoke and non-toxic. 本发明涉及一种电器设备内部连接线缆用的绝缘护套材料及其制备方法，包括如下重量份原材料：乙烯-醋酸乙烯酯共聚物30-70份、超低密度聚乙烯10-40份、马来酸酐接枝共聚物弹性体5-20份、硅酮母粒3～10份、氢氧化镁30～7