Synthetic resin
Bag making machine (4 sheets) The most important component of synthetic resin plastics, its content in plastics is generally 40% to 100%. Because of the high content and the nature of the resin often determines the nature of the plastic, resin is often considered synonymous with plastic. For example, a mixture of polyvinyl chloride resin and polyvinyl chloride plastic, phenolic resin and phenolic plastic. In fact, resin and plastic are two different concepts. An externally processed raw polymer of resin that is used not only in the manufacture of plastics, but also as a raw material for coatings, adhesives, and synthetic fibers. In addition to plastics containing a minimum of 100% resin, most plastics require the addition of other substances in addition to the main component resins.
2. Filler
Fillers, also known as fillers, increase the strength and heat resistance of plastics and reduce costs. For example, the addition of rice flour to phenolic resin can greatly reduce the cost, making phenolic plastic one of the cheapest plastics, while also significantly improving mechanical strength. Fillers can be divided into organic fillers and inorganic fillers, such as wood powder, broken steps, paper and various fabric fibers, such as glass fiber, diatomaceous earth, asbestos, carbon black and so on.
3. Plasticizer
Plasticizers increase the plasticity and softness of plastics, reduce brittleness, and make plastics easy to process. Plasticizers are generally miscible, non-toxic, odorless, high-boiling organic compounds that are stable to light and heat, most commonly phthalates. For example, when producing polyvinyl chloride plastic, if you add more plasticizer, you can get soft PVC plastic. If you don't add or add plasticizer (<10%), you can get rigid PVC plastic. .
4. Stabilizer
In order to prevent the synthetic resin from being decomposed and destroyed by light and heat during processing and use, and prolonging the service life, a stabilizer is added to the plastic. Commonly used are stearic acid eye, epoxy resin and the like.
5. Colorant
Colorants give plastics a variety of bright, beautiful colors. Common organic dyes and inorganic pigments are used as colorants.
Lubricant

The action of the lubricant prevents the plastic from sticking to the metal mold during molding, and at the same time makes the surface of the plastic smooth and beautiful. Common lubricants are stearic acid and its calcium and magnesium salts.