Spray-free plastic with no flowing mark or light welding line and preparation method thereof

Abstract

The invention relates to a spray-free plastic with no flowing mark or light welding line and a preparation method thereof. The spray-free plastic is prepared from the following raw materials in partsby weight: 90 to 95 parts of matrix resin, 2 to 3 parts of compatilizer, 1 to 2 parts of lubricant, 0.2 to 0.5 part of antioxidant, 0.2 to 0.5 part of ultraviolet absorber, 0.2 to 1.5 parts of effectadditive, and 2 to 6 parts of pigment master batch. Compared with the prior art, the spray-free plastic has the advantages that the weather-resistant property and size stability are excellent, the surface gloss is high, and the flowing mark is avoided; the welding line is basically avoided or the welding line is lighter in the subsequent secondary forming process; the effect of no flowing mark canbe realized without change of die; the complicated operation of traditional painting, electroplating and the like can be avoided, the procedures are greatly simplified, and more environment-friendlyeffect is realized; the toughness and anti-scratching property are excellent, and the processing fluidity is good; compared with metal resources, the longer-time use value is realized; the spray-freeplastic can be widely applied to the fields of automobile internal trims, bottom protective plates, home appliances, electronic equipment and the like.

Description

technical field [0001] The invention belongs to the field of spray-free materials, and relates to a spray-free plastic with no flow marks and low welding marks and a preparation method thereof. Background technique [0002] At present, in order to obtain plastic products with metallic texture, such as household electrical casings, automotive interior parts, portable electronic products, smart toilet seats, etc., the appearance is similar to pearlescent and metallic colors, and the paint film is formed on the surface by spraying. Meet product brand recognition and personalization of consumption. However, the spraying method often has the following disadvantages: it is easy to peel off the paint, and it is difficult to repair it simply; the process is relatively complicated, after the plastic product is injected, it needs to be sprayed twice, and the paint may need to be cured; the environment is polluted, and the paint solvent is easy to volatilize. Most of them are harmful ...

AI Technical Summary

Problems solved by technology

However, the spraying method often has the following disadvantages: it is easy to peel off the paint, and it is difficult to repair it simply; the process is relatively complicated. After the plastic product is injected, it needs to be sprayed twice, and the paint may need to be cured; the environment is polluted, and the paint solvent is easy to volatilize. Most of them are harmful to health; the defect rate is high, because the paint leather is difficult to remove, and the products are difficult to recycle; in addition, the current domestic requirements for environmental protection are getting higher and higher, so higher requirements are also put forward for the treatment of industrial waste in enterprises. The cost of spraying is rising day by day

However, the very high viscosity of ethylene propylene rubber results in very low melt flow rate and poor processability of polypropylene compositions

Also, bimodal polypropylene can still cause severe weld lines