Preparation method of composite filler for improving impact resistance of plastic

[0026] A method for preparing a composite filler for improving the impact resistance of plastics, which is prepared by the following method:

[0027] (1) Soak the attapulgite in a nitric acid solution with a mass fraction of 8% for 20 minutes, then wash it with deionized water, wash it three times with deionized water, and then dry it at 400°C;

[0028] (2) Soak the montmorillonite in an oxalic acid solution with a mass fraction of 3% for 35 minutes, use ultrasonic vibration treatment during the soaking process, and then dry it;

[0029] (3) Take 5 parts of polyethylene glycol, 3 parts of polyvinyl alcohol, 0.2 parts of expanded graphite, 1.2 parts of glass fiber, and 12 parts of water by weight, and stir at 35-40 ° C for 1-2 hours to obtain a mixed solution ;

[0030] (4) Mix the attapulgite prepared in step (1), the montmorillonite prepared in step (2), and the mixed solution obtained in step (3) in a weight ratio of 6:1:12, and mix them at 550r / min Stir at a rotating speed

[0041] Compared with Example 1, the carbonization treatment directly raises the temperature to 720° C. for carbonization without performing temperature swing treatment.

[0043] Compared with Example 1, the glass fiber is not modified.