Halogen-free low-smoke flexible mineral insulated fireproof cable
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A technology of insulation and fire prevention, minerals, applied in the direction of insulated cables, power cables, insulated conductors, etc., can solve the problems of inability to withstand high temperature, fire prevention, and failure to reach, and achieve guaranteed service life, good shielding effect, and stable structure solid effect
Pending Publication Date: 2019-01-29
四川鸿鑫国泰电缆有限责任公司
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Problems solved by technology
Since the working temperature of the flexible mineral insulated cable (BBTRZ) is 70°C to 90°C, it cannot meet the requirements above 130°C, and cannot perform the functions of high temperature resistance and fire prevention
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Embodiment 1
[0019] Example 1, the halogen-free low-smoke radiation cross-linked flame-retardant polyolefin includes the following components by mass percentage: polyurethane thermoplastic elastomer 20, POE elastomer 10, aluminum hydroxide 10, softening agent 7, polypropylene Resin 15, aluminum hypophosphite 10, zinc borate 5, ammonium molybdate 5, antioxidant 2, epoxy butyl oleate 10, carbon black 3, light calcium carbonate 3.
Embodiment 2
[0020] Example 2, the halogen-free low-smoke radiation cross-linked flame-retardant polyolefin includes the following components by mass percentage: polyurethane thermoplastic elastomer 30, POE elastomer 20, aluminum hydroxide 17, softening agent 5, polypropylene Resin 10, aluminum hypophosphite 5, zinc borate 2, ammonium molybdate 2, antioxidant 1, epoxy butyl oleate 5, carbon black 2, light calcium carbonate 1.
Embodiment 3
[0021] Example 3, the halogen-free low-smoke radiation cross-linked flame-retardant polyolefin includes the following components by mass percentage: polyurethane thermoplastic elastomer 22, POE elastomer 13, aluminum hydroxide 20, softening agent 10, polypropylene Resin 12, aluminum hypophosphite 6, zinc borate 2, ammonium molybdate 4, antioxidant 1, epoxy butyl oleate 6, carbon black 2, light calcium carbonate 2.
[0022] Compared with the prior art, the present invention has the advantages that: the conductor achieves a better effect on softness, and meets the requirements of frequency conversion; and achieves better shielding effect through the first semiconductor shielding layer provided, and The structure is stable and strong, and the durability is good. It is equipped with a halogen-free and low-smoke radiation cross-linked flame-retardant polyolefin sheath layer and an ethylene-four The vinyl fluoride copolymer resin layer makes the present invention have better charact...
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Abstract
The invention provides a halogen-free low-smoke flexible mineral insulated fireproof cable, which comprises wire cores, a shielding layer, a sheath layer and a flame-retardant filler, wherein there are four groups of uniformly distributed wire cores, each group includes conductors and an insulation layer, the conductors in each group are twisted pairs, the surfaces of the twisted pair conductors are covered with a first insulation layer, and the surface of each first insulation layer is covered with a first shielding layer; the groups of wire cores are provided with the flame-retardant fillertherebetween which wraps the wire cores, the flame-retardant filler is externally provide with a second shielding layer, the surface of the second shielding layer is provided with a second insulationlayer, the second insulation layer is sequentially provided with a copper mesh braided shielding layer, an irradiation insulation layer and the sheath layer, and the sheath layer is a halogen-free low-smoke irradiation cross-linked flame-retardant polyolefin sheath. The conductors of the cable achieves a good effect in softness and meet the requirements of frequency conversion; and the halogen-free low-smoke flexible mineral insulated fireproof cable realizes a good shielding effect through setting the first semiconductor shielding layer, and is stable and firm in structure and good in durability.
Description
technical field [0001] The invention relates to the field of cables, in particular to a halogen-free low-smoke flexible mineral insulated fireproof cable. Background technique [0002] Wire and cable have the function of power transmission and information transmission, and play an important role in people's life and production. Designing and preparing low-smoke, low-toxic cable materials with excellent flame-retardant and insulating properties has become a hot spot in flame-retardant research today. Although the traditional magnesium hydroxide and aluminum hydroxide flame retardants can endow the material with good flame retardancy, however, since the matrix resin of most cable materials is a non-polar polyolefin polymer, the polar hydrogen The compatibility of magnesium oxide and aluminum hydroxide is poor, which often reduces the mechanical properties and processing properties of materials. It has been studied that the cable material material with good flame retardant pe...
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