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Composition and classification of plastic materials
by：CSSSLD
2021-01-23
, many different kinds of plastic, there are about 300 species, there are dozens of, the commonly used plastic also and each kind of plastic and has a variety of brands.
Thermoplastic heating softening and flow, cooling time, curing finalize the design, the process is reversible and can be repeated.
Say simply, thermoplastics is by repeated heating and still has the plastic injection molding processing and synthetic resin made of plastic.
Common thermoplastic polyethylene, polypropylene, polystyrene, polyvinyl chloride, ABS, polyamide, polycarbonate, pom, polyphenyl ether, polysulfone, ptfe, chlorinated polyether and so on.
polymer on the thermal, mechanical, oxygen, water, light, radiation and ultrasonic degradation can occur under the action of chemical process, so that the performance degradation. So-called degradation, usually refers to the phenomenon of polymer relative molecular mass of the lower, sometimes also known as cracking. For molding, in the case of normal operation, thermal degradation is the main. In the process of machining in most case, it should be managed to reduce and avoid polymer degradation, such as: the technical index of the strict control of raw materials, use of qualified raw materials; Before using for the polymer strict dry; The reasonable processing technology and processing conditions were determined, make the polymer under the condition of not easy to produce the degradation processing molding, the use of additives, etc.
lubricant is to improve the liquidity of plastic melt, reduce or avoid the equipment or mould friction and adhesion, and improve the surface roughness of the parts and add additive, commonly used lubricants with stearic acid and its salts. Plastic additives and curing agent, foaming agent, flame retardant, antistatic agent, etc. Not every kind of plastic to join all additives, but according to varieties of plastic and use requirement to join some additives as needed.
plastic component is fairly complex, almost all of the plastic are based on all kinds of resin and add other additives. Resins and additives in different proportion, can get different performance plastics. Resin mass fraction is 40% commonly - in the plastic 65%, main effect is to contact or other ingredients in the adhesive plastic, and determine the type of plastic and the main performance, such as thermoplastic or thermosetting, mechanical, electrical, chemical and physical properties, etc.
filler is also called the packing, main effect is incremental and modified. Such as glass fiber as plastic fillers, can make the plastic mechanical strength increased significantly. In addition, some filler can make plastic electrical conductivity, magnetic conductivity, thermal conductivity and other properties. So the choice of correct filling agent, can improve the performance of the plastic and expand the scope of its use. Some resin of low plasticity and flexibility and is very poor, in order to improve the processing performance, improve the performance of the plastic flexible, elastic, and other necessary, usually join can dissolve with resin, less volatile, high boiling point of organic compounds, such substances called plasticizers. Plasticizer is usually a liquid or solid ester of low melting point compounds.
excessive hardening or overripe injection tooling parts will appear a lot of defects in performance, such as low mechanical strength, brittle, color, surface dense vesicle, etc. Hardening is insufficient, the molecules is strong enough, also affect the performance of the product, such as mechanical strength, heat resistance, chemical corrosion resistance, electrical insulation, such as down, sometimes may also make parts have crack. Overripe and plantings phenomenon sometimes occurs in the same parts. There may be the main reasons for forming of high temperature, the temperature of the lower die temperature is different, too big or too thick parts, etc.
colorants, also known as pigment, is a beautiful and adornment effect, some colorants also has to prevent light aging, improve the stability of the plastic, and so on. Commonly used colorants have organic pigments, inorganic pigments and dyes, etc. That will slow down the plastic metamorphic material known as stabilizer, divided into light stabilizers, heat stabilizer, antioxidant and so on. Commonly used stabilizers have stearic acid salt, lead compounds and epoxy compound, etc.
more excellent articles: PEEK material properties and processing conditions of injection, click directly.
http://www。 csssld。 cn//html/2017/Info_0715/633。 HTML
nantong on suye's official website: http://www. csssld。 Cn / /
more wonderful articles, immediately search: changshu da plastic products factory smoothly
polymer on the thermal, mechanical, oxygen, water, light, radiation and ultrasonic degradation can occur under the action of chemical process, so that the performance degradation. So-called degradation, usually refers to the phenomenon of polymer relative molecular mass of the lower, sometimes also known as cracking. For molding, in the case of normal operation, thermal degradation is the main. In the process of machining in most case, it should be managed to reduce and avoid polymer degradation, such as: the technical index of the strict control of raw materials, use of qualified raw materials; Before using for the polymer strict dry; The reasonable processing technology and processing conditions were determined, make the polymer under the condition of not easy to produce the degradation processing molding, the use of additives, etc.
lubricant is to improve the liquidity of plastic melt, reduce or avoid the equipment or mould friction and adhesion, and improve the surface roughness of the parts and add additive, commonly used lubricants with stearic acid and its salts. Plastic additives and curing agent, foaming agent, flame retardant, antistatic agent, etc. Not every kind of plastic to join all additives, but according to varieties of plastic and use requirement to join some additives as needed.
plastic component is fairly complex, almost all of the plastic are based on all kinds of resin and add other additives. Resins and additives in different proportion, can get different performance plastics. Resin mass fraction is 40% commonly - in the plastic 65%, main effect is to contact or other ingredients in the adhesive plastic, and determine the type of plastic and the main performance, such as thermoplastic or thermosetting, mechanical, electrical, chemical and physical properties, etc.
filler is also called the packing, main effect is incremental and modified. Such as glass fiber as plastic fillers, can make the plastic mechanical strength increased significantly. In addition, some filler can make plastic electrical conductivity, magnetic conductivity, thermal conductivity and other properties. So the choice of correct filling agent, can improve the performance of the plastic and expand the scope of its use. Some resin of low plasticity and flexibility and is very poor, in order to improve the processing performance, improve the performance of the plastic flexible, elastic, and other necessary, usually join can dissolve with resin, less volatile, high boiling point of organic compounds, such substances called plasticizers. Plasticizer is usually a liquid or solid ester of low melting point compounds.
excessive hardening or overripe injection tooling parts will appear a lot of defects in performance, such as low mechanical strength, brittle, color, surface dense vesicle, etc. Hardening is insufficient, the molecules is strong enough, also affect the performance of the product, such as mechanical strength, heat resistance, chemical corrosion resistance, electrical insulation, such as down, sometimes may also make parts have crack. Overripe and plantings phenomenon sometimes occurs in the same parts. There may be the main reasons for forming of high temperature, the temperature of the lower die temperature is different, too big or too thick parts, etc.
colorants, also known as pigment, is a beautiful and adornment effect, some colorants also has to prevent light aging, improve the stability of the plastic, and so on. Commonly used colorants have organic pigments, inorganic pigments and dyes, etc. That will slow down the plastic metamorphic material known as stabilizer, divided into light stabilizers, heat stabilizer, antioxidant and so on. Commonly used stabilizers have stearic acid salt, lead compounds and epoxy compound, etc.
more excellent articles: PEEK material properties and processing conditions of injection, click directly.
http://www。 csssld。 cn//html/2017/Info_0715/633。 HTML
nantong on suye's official website: http://www. csssld。 Cn / /
more wonderful articles, immediately search: changshu da plastic products factory smoothly
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