What is the composition of the plastic used in the three-side bag sealing machine? Let's discuss it below.
The plastic used in the three-side bag sealing machine is not a pure substance, it is made up of many materials. Polymer polymer (or synthetic resin) is the main component of plastic, in addition, in order to improve the performance of plastic, but also in the polymer to add a variety of auxiliary materials, such as fillers, plasticizer, lubricants, stabilizers, colorants, etc., in order to become a good performance of plastic.
1. Synthetic resin
Synthetic resin is the most important component of plastic, and its content in plastic is generally 40% ~ 100%. Because the content is large, and the nature of the resin often determines the nature of the plastic, so people often regard the resin as a synonym for plastic. For example, polyvinyl chloride resin and polyvinyl chloride plastic, phenolic resin and phenolic plastic are confused. In fact, resin and plastic are two different concepts. Resin is an unprocessed primitive polymer that is used not only to make plastics but also as a raw material for paints, adhesives and synthetic fibers. With the exception of a few plastics containing 100% resin, the vast majority of plastics, in addition to the main component resin, also need to add other substances.
2, packing
Fillers, also known as fillers, can improve the strength and heat resistance of plastics, and reduce costs. For example, the addition of wood powder to phenolic resin can greatly reduce the cost, making phenolic one of the cheapest plastics, while significantly improving its mechanical strength. Fillers can be divided into organic fillers and inorganic fillers, the former such as wood powder, rag, paper and a variety of fabric fibers, such as glass fiber, diatomite, asbestos, carbon black, etc..
3. Plasticizer
Plasticizer can increase the plasticity and softness of plastic, reduce brittleness, so that plastic is easy to process and shape. Plasticizer is generally can be miscible with resin, non-toxic, odorless, light, heat stable high boiling point organic compounds, the most commonly used is phthalate esters. For example, when producing polyvinyl chloride plastic, if more plasticizer is added, soft polyvinyl chloride plastic can be obtained. If no or less plasticizer is added (dosage <10%), hard polyvinyl chloride plastic is obtained.
4. Stabilizer
In order to prevent synthetic resin in the process of processing and use by light and heat decomposition and destruction, prolong service life, to join in the plastic stabilizer. Commonly used are stearate, epoxy resin and so on.
5. Coloring agent
Coloring agents can make plastics have a variety of bright, beautiful colors. Organic dyes and inorganic pigments are commonly used as colorants.
6. Lubricants
The function of lubricant is to prevent plastic from sticking to the metal mold when forming, and to make the surface of plastic smooth and beautiful. The commonly used lubricants are stearic acid and its calcium and magnesium salts.
In addition to the above auxiliaries, flame retardants, foaming agents and antistatic agents can also be added to plastics to meet different requirements.
Ruian Zhoutai Packaging Machinery Co., Ltd. specializes in the production of three-side bag sealing machine. For more information, please pay attention to the official website www.raztjx.com
