Generally speaking, the effect of impregnation is better than that of spray. However, it still depends on what products are produced. This is also a better cost accounting. Over the past few years, the application of immersion molding technology is becoming more and more common. It has non-toxic, wear-resistant, sun-resistant, colorful, good handle and other characteristics. Nowadays, plastic soaking can also be seen in daily life, especially steel chair, which has anti-skid effect and is very popular with some friends who like fitness. There are guardrails, the previous guardrail is very easy to drop paint, but after using plastic barrier can be used for several years, and the color is still bright as new.