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2 filler
Filler and filler, it can increase the plastic strength and heat resistance, and reduce the cost. For example, is added into the phenolic resin wood powder can reduce cost greatly, make the phenolic plastics become the most inexpensive plastic one, at the same time can obviously improve the mechanical strength. Packing can be divided into two kinds of organic filler and inorganic filler, such as wood powder,Water slide cloth, paper and all kinds of textile fibers, which fibers such as glass, diatomaceous earth, asbestos, carbon black.
3 plasticizer
Plasticizer can increase the plasticity of plastic and softness, reduce brittleness, so the plastic easy processing molding. Plasticizer is generally with resin miscible, non-toxic, odorless, light, thermal stability of high boiling organic compounds, the most commonly used is the adjacent benzene two formic acid esters. Such as the production of PVC plastic, if adding more plasticizers can be soft PVC plastics, if not or less plasticizer ( dosage < 10% ), was a rigid PVC plastics.
The 4 stabilizer
In order to prevent the synthesis of resin during processing and using process affected by light and heat effect of decomposition and destruction, prolong the service life, adding stabilizer in plastics. Commonly used with stearic acid, epoxy resin.
The 5 colorant
Colorant can make the plastic with a variety of bright,Plastic wood beautiful colors. Commonly used organic dyes and inorganic pigment as the colorant. Special plastic
The 6 lubricant
A lubricant role is to prevent the plastic during the molding process does not stick on metal mold, at the same time can make the plastic surface is smooth and beautiful. Commonly used lubricants with stearic acid and its calcium and magnesium salt.
7 antioxidants
Prevent the plastic molded during the heating or for use in high temperature thermal oxidation process, and make the plastic yellow, crack etc.
In addition to the above additives, plastics can also be added into the flame retardant agent, foaming agent, antistatic agent, to meet different use requirements.
One,Playground equipment by using the characteristics classification
According to a kind of plastic with different characteristics, usually plastic is divided into general plastics, engineering plastics and specialty plastics three types.
The general plastics
Generally refers to the production of large, wide use, forming a good, cheap plastic. General plastics have five varieties, namely polyethylene ( PE ), polypropylene ( PP ), polyvinyl chloride ( PVC ), polystyrene ( PS ) and acrylonitrile - butadiene - styrene copolymer ( ABS ). These five categories of use of plastic raw materials plastic occupy most of the rest of the basic, can be classified as special plastic varieties, such as: PPS, PPO, PA, PC, POM, their daily life products in very small quantities, mainly used in the construction industry, the national defense science and technology and other high-end areas, such as automotive, aerospace, construction, communications and other fields. According to the classification of plastic plasticity, can be divided into thermoplastic and thermosetting plastic. Typically, thermoplastic products can be recycled, and thermoset plastics can, according to the plastic optical properties to points, can be divided into a transparent, translucent and opaque materials, such as PS, PMMA, AS, PC belongs to the transparent plastic, and most other plastics for opaque plastic.