A kind of high-impact nylon pa66 composite material and its preparation method and application on automobile
A PA66, composite material technology, applied in the field of modifying a high-impact nylon PA66 composite material and its preparation, can solve the problems of insufficient strength, toughness, corrosion resistance, unstable product quality, poor surface gloss and the like, To achieve the effect of good fluidity, stable injection process and good flame retardancy
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Embodiment 1
[0033] To prepare high impact nylon PA66 composite material, the specific steps are:
[0034] The first step: prepare A material (kg):
[0035] Weigh nylon PA6630, ACS resin 40, polycarbonate 15, aminopropyltriethoxysilane 0.2, methyltriethoxysilane 0.4, antioxidant 10100.2, isooctyl dimercaptoacetate di-n-octyltin 0.3, poly Caprolactone 2, polyethylene wax 1.5, modified nano powder 6,
[0036] Among them, the modified nano powder is prepared by the following method: after mixing calcium carbonate, lapis lazuli powder, and potash feldspar powder in the same proportions, burning them at 600-700°C for 4-5 hours, then grinding into nano powders and mixing in the equivalent Stir the bis(dioctyloxy pyrophosphate) ethylene titanate with 3-5% by weight of the powder evenly, dry, and crush into powder.
[0037] After the weighed raw materials are mixed uniformly, they are sucked into a drying barrel and dried at 90-100°C for 4-6 hours;
[0038] When the water content of the mixture is less th...
Embodiment 2
[0048] Using the high-impact nylon PA66 composite material prepared in Example 1 to prepare the connector piece-type plug sheath DJ7055-3-11 for automobiles, it includes the following steps:
[0049] (1) After mixing 25kg of high-impact nylon PA66 composite material and 1.5g of yellow-green powder, add it to the dryer and dry it at 100-120℃ for 6h.
[0050] (2) Set the temperature of the heating section of the injection molding machine: the first section 275±5℃, the second section 270±5℃, the third section 265±5℃, the fourth section 260±5℃, the fifth section 255±5 ℃;
[0051] (3) Add the dried raw materials to the injection molding machine and set the molding process parameters of the injection section:
[0052] a. The first stage uses 35-40Mpa medium and low pressure, 45-55m / s medium speed injection, the injection time is 1.0-1.5 seconds, and the injection volume is 78-80% of the product;
[0053] b. The second stage adopts 30-35Mpa medium and low pressure injection, 45-55m / s medium s...
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