Introduction of opaque injection button

 opaque injection button is often mixed with pigment directly into the resin for coloring and injection molding into buttons of various colors. When the batch size of the buttons is large and the color is determined before production, the method of coloring by premixing the pigment is often used. The advantage of using this method is that relatively low-cost plastics can be selected to reduce costs and facilitate injection molding. Commonly used plastics for pigmented plastic buttons are polypropylene, ABS, etc. 

The main advantages of using polypropylene plastic are its low price, low requirements for molds, good injection processability, and excellent corrosion resistance (mostly resistant to most organic solvents and acids and alkalis). Buttons The mechanical properties are better. In addition to polypropylene, ABS is also often used to produce colored plastic buttons, but ABS is more expensive than polypropylene and has less resistance to organic solvents than polypropylene. Generally speaking, the overall performance of ABS colored buttons is not as good as polyethylene, so it is not widely used.