As a matter of fact, the raw materials of plastic bags are composed of synthetic resins, fillers, plasticizers, stabilizers, etc.
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Bag Making Machine Synthetic resin is the main component of plastics, and its content in plastics is generally 40% - 100%. Because of its high content and the properties of resin often determine the properties of plastics, people often regard resin as a synonym of plastics. For example, PVC resin and PVC plastic, phenolic resin and phenolic plastic are confused. 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 used as raw materials for coatings, adhesives and synthetic fibers. In addition to a very small part of plastics containing 100% resin, the vast majority of plastics,
Bag making machine in addition to the main component of resin, but also need to add other substances.
Fillers, also known as fillers, can improve the strength and heat resistance of plastics and reduce the cost of plastics. For example, the addition of wood flour into phenolic resin can greatly reduce the cost, making phenolic plastic one of the cheapest plastics, and significantly improve the mechanical strength. Fillers can be divided into organic fillers and inorganic fillers. The former includes wood flour, rags, paper and various fabric fibers, while the latter includes glass fiber, diatomite, asbestos and carbon black.
Plasticizers, plasticizers can increase the plasticity and softness of plastics, reduce brittleness, and make plastics easy to process. Plasticizers are generally miscible with resin, non-toxic, odorless, light and heat stable high boiling point organic compounds, the most commonly used are phthalates. For example, in the production of PVC plastics, if more plasticizers are added, soft PVC plastics can be obtained. If less or no plasticizers are added (dosage < 10%), rigid PVC plastics can be obtained.
Stabilizer, in order to prevent the decomposition and damage of synthetic resin by light and heat in the process of processing and use, and prolong the service life, the bag making machine should add stabilizer into the plastic. Stearate and epoxy resin are commonly used.
February 24, 2021
