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Common vacuum forming machine

Do experts analyze what the four major structural

by:Mengxing     2021-03-16
No. 1: Synthetic resin.
It is the essential component of plastics, and its content in plastics is generally 40% to 100%. Because the extensive content and the resin's nature often determine the plastic's nature, people often regard the resin as a plastic synonym. For example, confuse polyvinyl chloride resin with polyvinyl chloride plastics and phenolic resins with phenolic plastics. Resin and plastic are two different concepts. Resin is an unprocessed raw polymer used to make plastics and raw material for coatings, adhesives, and synthetic fibers. In addition to a tiny part of plastics containing 100% resin, most plastics need to add other substances and the main component resin.

No. 2: Filler.
It is also called a filler, improving the strength and heat resistance of plastics and reducing costs. For example, the addition of wood powder to the phenolic resin can significantly reduce the cost, making phenolic plastic one of the cheapest plastics. At the same time, it can dramatically improve mechanical strength. Fillers can be divided into organic fillers and inorganic fillers. The former is like wood.

No. 3: Plasticizer.
It can increase the plasticity and softness of the plastic, reduce the brittleness, and make the plastic easy to process and shape. Plasticizers are generally high-boiling organic compounds that are miscible with resin, non-toxic, odorless, and stable to light and heat. The most commonly used are phthalate esters. For example, in polyvinyl chloride plastics, if more plasticizers are added, soft polyvinyl chloride plastics can be obtained if no or fewer plasticizers are added (amount <10%), rigid polyvinyl chloride plastics can be obtained.

No. 4: Stabilizer.
To prevent the synthetic resin from being decomposed and damaged by light and heat during processing and use and to prolong its service life, stabilizers should be added to the plastic. Commonly used are stearate, epoxy resin, and so on.
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