Highly effective flame-retardant environment-protective thermoplastic plastic and making process thereof
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A thermoplastic and environmentally friendly technology, applied in the direction of conductors, electrical components, circuits, etc., can solve problems such as aggravated aging, reduced insulation performance, and fire spread
Inactive Publication Date: 2008-12-17
广东电缆厂有限公司 +1
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[0002] With the further advancement of the country's advocacy of environmental protection requirements, environmentally friendly cable plastics have gradually replaced PVC and other high-energy, high-pollution, low-performance cable plastics. Environmentally friendly plastics cannot contain halogen flame retardants, but can only use inorganic flame retardants such as hydroxides. It needs to add 50-60% (weight percentage) to achieve good natural performance. Polarity will greatly reduce the mechanical properties of the material. At the same time, the molten material will drip when the material is burning, which will make the fire spread more easily and aggravate the fire. In addition, adding a large amount of hydroxide will increase the resistivity of the cable flange and reduce its Insulation performance, aggravation of aging, so the solution to the above problems must enable the formula and production process to ensure the balance of mechanical properties and flame retardancy, insulation, anti-aging and other properties, which is also the problem to be solved by the present invention
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Embodiment 1
[0049] The formula composition and its weight points are as follows:
[0084] The specific manufacturing process of above-mentioned embodiment 1, embodiment 2, embodiment 3 is as follows: 1)
[0085] Weigh raw materials by weight;
[0086] 2) Al(OH) in ethylene-vinyl acetate copolymer, high-density polyethylene, compatibilizer, antioxidant, lubricant and formula 3 , Mg(OH) 3 Pour 50% of the formula into the internal mixer to fully mix the plastic additives with the powdered product. When the material temperature reaches 80°C±5°C and the material in the machine will be agglomera...
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Abstract
The invention particularly relates to a highly-effective flame-retardant environmental friendly thermoplastic plastic used in wires and cables and a making technology thereof. The formula of the thermoplastic plastic of the invention comprises the following materials by weight portion: 55 portions to 65 portions of ethylene-vinyl acetate copolymer, 5 portions to 25 portions of high-density polyethylene, 70 portions to 140 portions of Al(OH)3, 30 portions to 70 portions of Mg(OH)3, 6 portions to 10 portions of organic flame retardant with synergy of flame retardancy, 20 portions to 30 portions of maleic anhydride compatilizer, 0.5 portion to 1 portion of pentaerythritol ester antioxidant, 0.5 portion to 2 portions of lubricant and 3 portions to 10 portions of nano-char master batch. The thermoplastic plastic of the invention adopts polyolefin as basic resin and hydroxide as a main flame retardant by combining auxiliary agents such as a compatilizer, a flame retardant synergist, a char catalyst, etc. to prepare environmental friendly materials used in PE wires and cables and having good overall properties such as low smoke zero halogen, high mechanical strength, good flame retardancy, etc, through the pelleting after plasticization and blending.
Description
Technical field: [0001] The invention relates to the technical field of polymer plastics, in particular to a high-efficiency flame-retardant and environment-friendly thermoplastic used for electric wires and cables and a manufacturing process thereof. Background technique: [0002] With the further advancement of the country's advocacy of environmental protection requirements, environmentally friendly cable plastics have gradually replaced PVC and other high-energy, high-pollution, low-performance cable plastics. Environmentally friendly plastics cannot contain halogen flame retardants, but can only use inorganic flame retardants such as hydroxides. It needs to add 50-60% (weight percentage) to achieve good natural performance. Polarity will greatly reduce the mechanical properties of the material. At the same time, the molten material will drip when the material is burning, which will make the fire spread more easily and aggravate the fire. In addition, adding a large amoun...
Claims
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