Mineral oxygen insulation material composition for flexible mineral insulated cable and preparation method of mineral oxygen insulation material composition

Abstract

The invention relates to the technical field of cable materials, and particularly relates to a mineral oxygen insulation material composition for a flexible mineral insulated cable and a preparation method of the mineral oxygen insulation material composition. The mineral oxygen insulation material composition is prepared from the following components in parts by weight: 30-55 parts of inorganic adhesive, 20-70 parts of flame retardant, and10-50 parts of inorganic filler. The preparation method comprises the steps of weighing proper amounts of the above components; mixing the components uniformly by using a stirrer; and finally extruding and shaping by using a silicon rubber extruder, so as to obtain a finished product. The finished product prepared by the method resists fire, expands whenbeing heated, and generates a porous, highly foaming ceramic thermal resistant material, a hard ceramic shell in the cable can well resist flame and fire, isolate fire and prevent fire, so as to keepa circuit complete, and the mineral oxygen insulation material composition is mainly applied to medium and low voltage fire-proof fire-resistant cables. The oxygen insulation material meets the requirements of TICW 8-2012 fire-resistant insulation layer completely, the prepared cable meets the C.W.Z level of requirements of a BS6387 standard, that is, fire resistance at 950DEG C, spraying, vibration test and the like.

Description

technical field [0001] The invention relates to the technical field of cable materials, in particular to a mineral oxygen barrier material composition for flexible mineral insulated cables and a preparation method thereof. Background technique [0002] As early as the end of the 19th century, a Swiss engineer Arnold Francois Bore discovered and used MI mineral insulated cables for research and application. From 1934 to 1936, France, the United Kingdom, Italy, Canada, Australia, the United States, the Soviet Union, and Japan also cited the production and application of mineral insulated cables. my country developed and produced them in the 1960s, mass production began at the end of the 20th century, and entered the 21st century. National fire protection design code and widely used in China. [0003] Mineral insulated cables are widely used in high-rise buildings, petrochemicals, airports, tunnels, ships, offshore oil platforms, aerospace, iron and steel metallurgy, shopping c...

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Problems solved by technology

[0005] For example, the existing Chinese invention patent with application number 201710491582.1 discloses a mineral insulating material for flexible mineral insulated fireproof cables, including plastic elastomer, mica, mineral fiber, antimony trioxide, quartz sand, magnesium hydroxide, di Silicon oxide, aluminum hydroxide, precipitated white carbon black, coupling agent and antioxidant, etc.; the fire resistance, temperature resistance, heat resistance and corrosion resistance of the materials made by the above technical scheme are still poor, so they cannot meet the actual requirements. use needs