Preparation method of easy-to-char EVA flame-retardant composite material
A flame retardant composite material and carbon-forming technology, applied in the field of EVA flame retardant materials, can solve the problems of high raw material cost, complicated operation, environmental pollution, etc., and achieve excellent oxygen index and mechanical properties, simple operation steps, and high flame retardant grade. Effect
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Embodiment 1
[0032] 1. In Example 1, the flame retardant is magnesium hydroxide, the addition amount is 57%, the compatibilizer is MC226, the addition amount is 4.8%, the antioxidant is antioxidant 1010, the additive is 0.2%, and the synergist is The addition amount of triphenylphosphine oxide is 3%. The above materials and EVA (addition amount of 35%) are put into an internal mixer together, and mixed at 150 ° C for 10 minutes.
[0033] 2. Take out the kneaded product in step 1 and place it on a flat vulcanizer for hot pressing molding, with a pre-pressing time of 1 min, a pressing time of 10 min, and a hot-pressing temperature of 170°C.
[0034] 3. Cut the composite material in step 2 to the required size.
[0035] 4. Take the spline cut in step 3 for testing.
Embodiment 2
[0037] 1. In this example 1, the flame retardant is magnesium hydroxide, the addition amount is 57%, the compatibilizer is MC226, the addition amount is 4.8%, the antioxidant is antioxidant 1010, the additive is 0.2%, and the synergist is 3000 mesh silicon powder, the addition amount is 3%. The above materials and EVA (addition amount of 35%) were put into the internal mixer together, and mixed at 150 ° C for 10 min.
[0038] 2. Take out the kneaded product in step 1 and place it on a flat vulcanizer for hot pressing. The pre-pressing time is 1 min, the pressing time is 10 min, and the hot-pressing temperature is 170°C.
[0039] 3. Cut the composite material in step 2 to the required size.
[0040] 4. Take the spline cut in step 3 for testing.
Embodiment 3
[0042] 1. In this example 1, the flame retardant is magnesium hydroxide, the addition amount is 57%, the compatibilizer is MC226, the addition amount is 4.8%, the antioxidant is antioxidant 1010, the additive is 0.2%, and the synergist is Silicone powder, the addition amount is 3%. The above materials and EVA (addition amount of 35%) were put into the internal mixer together, and mixed at 150 ° C for 10 min.
[0043] 2. Take out the kneaded product in step 1 and place it on a flat vulcanizer for hot pressing. The pre-pressing time is 1 min, the pressing time is 10 min, and the hot-pressing temperature is 170°C.
[0044] 3. Cut the composite material in step 2 to the required size.
[0045] 4. Take the spline cut in step 3 for testing.
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