The choice of plastic materials needs to be further determined by the environment in which the product will be used, for example UV protection, flame-retardant, etc.

The application of plastics in the food industry is mainly reflected in food packaging, which requires the safety of raw materials to comply with FDA regulations.

Some plastic products need to be used outdoors, and the strength of plastic products will gradually decrease after a long period of exposure to UV light.

High-temperature plastics are engineering plastic with melting points between 216 and 382 degrees Celsius, and they are gradually replacing metal materials as the main raw material for automotive parts.

Injection molding is a complex process, and the product design is the key part of the whole process. A small design issues may cause serious quality problems in molding process.

Suitable packaging methods can protect the products in transit.

Through the recycling of injection-molded plastic, a great amount of raw material can be saved each year, and the global impact of the greenhouse effect can be reduced.

At current, the purpose of plastic testing is to analyze the fundamental properties of plastic products and material, and the main standard for references are ISO, ASTM, DIN, GB, etc.

To ensure that the product can reach the designed size, we should adjust the mold design in combination with the properties of material, mold structure, and parameters of injection machine, thereby to control the product size within the appointed tolerance range.

At present, there are many thermoplastic materials with good mechanical properties that can be used to produce plastic gears, and these plastic-made gears can meet the requirements of daily use.