How to distinguish the quality of injection barrel?

Whether there are relevant production licenses, and whether the qualifications of the manufacturers'business licenses are complete; the raw materials selected for the products are better than the new ones; depending on the various performance indicators of the products. Such as mechanical strength, heat resistance, solvent resistance, etc., of course, this has to be based on different uses to consider the parameters required for the selected products.
Raw material production or recycled material production, at a glance, it is different. It is suggested that customers who need to order plastic buckets can go to the manufacturer first to see the scale of production and the raw materials they use. This quality is poor in raw materials. Some use raw materials, others use recycled materials. The barrels made of recycled materials are usually darker in color.