In order to improve the function of plastics, it is necessary to add various auxiliary materials in polymers, such as fillers, plasticizers, smoothers, stabilizers, colorants, etc., so as to make plastics with good function.
1. Synthetic resin is the primary component of plastic, and its content in plastic guess is generally in 04-1. Because of its high content, and the nature of resin often determines the nature of plastic, people often regard resin as a synonym of plastic. For example, compare PVC resin with PVC plastics, phenolic resin with phenolic plastics. In fact, resin and plastic are two different concepts. Resin is a kind of raw polymer, which is not only used to make plastics, but also is the raw material of coatings, adhesives and synthetic fibers. In addition to a small part of plastics containing 1 resin, the vast majority of plastics, in addition to the primary component resin, also need to participate in other substances.
2. Filler is also known as filler, which can improve the strength and heat-resistant function of plastics and reduce the cost. For example, the cost of phenolic resin can be greatly reduced after it participates in wood powder, making it one of the low-cost plastics, and the mechanical strength can be significantly improved together. Fillers can be divided into organic fillers and inorganic fillers, the former is wood powder, rags, paper and various fabric fibers, the latter is glass fiber, diatomite, asbestos, carbon black, etc.
3. Plasticizer plasticizer can increase the plasticity and softness of the plastic, reduce the brittleness, and make the plastic easy to be processed and formed. Plasticizers are generally high boiling point organic compounds that can be miscible with resins, non-toxic, odorless, light and heat stable, and phthalates are commonly used. For example, in the consumption of PVC plastics, if more plasticizers are involved, soft PVC plastics can be obtained. If no or less plasticizers are added (dosage < 1), rigid PVC plastics can be obtained.
4. In order to prevent the synthesis and damage of synthetic resin by light and heat in the process of processing and application and extend the service life, the stabilizer should be involved in the plastic guess. Commonly used stearate, epoxy resin, etc.
5. Colorant colorant can make plastics have various gorgeous and beautiful colors. Organic dyes and inorganic pigments are often used as colorants.
6. The function of the smooth agent is to prevent the plastic from sticking to the metal mold during the molding, so that the plastic surface can be lubricated and beautiful together. Commonly used smoothing agents are stearic acid and calcium magnesium salt. In addition to the above auxiliaries, plastic guessing can also participate in flame retardant, foaming agent, antistatic agent, etc.
The above is the relevant content introduced by Shandong mould manufacturer. If you want to know more, please visit the website: http://www.jnhjgs.cn