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According to the use of the products material

by:CSSSLD     2021-01-23
ABS material figure the most close to the circular, thus its comprehensive performance is better than polystyrene, acrylonitrile/styrene copolymer, is the first selection of shell material varieties. Star contour model diagram method also has its limitations, because the actual when select material, in addition to meet the needs to consider the indicators, often need to emphasize several prominent indicators. Such as injection molding processing factory ABS, PS, HIPS in three kinds of material, require good transparency, low cost, it should choose the PS is advisable.

resistivity have surface resistivity and volume resistivity, resistivity of plastics materials most conforms to the requirement of insulating material, is widely used for different purposes of electrical insulating materials. General purpose can choose PVC wire and cable, for high frequency high-pressure situations to choose high resistivity, dielectric constant and high dielectric strength of the PE and described. properties, hard parts can choose HDPE, PP and PTFE, PI, etc. As electrician class insulation materials and products have a high dielectric strength, arc resistance and heat resistance, generally choose thermosetting plastic, commonly used amino epoxy plastic plastic, bakelite and etc.

type star contour method is a simple, intuitive material selection method, it is suitable for the already preselected main performance meet the requirements of the use of handsome choose between several kinds of materials. As a result, he is not a direct material selection methods, but rarely established in the basic material in the comprehensive evaluation method of indirect material. Planetary approximates to circular contour model star figure in this picture, its each index more balanced, comprehensive performance is better.

the various components in the electronic industry in addition to the electrical performance requirements, but also on the mechanical properties, heat resistance and processing performance have higher demand, could be selected according to the specific situation, the commonly used plastic varieties have PP, PC, POM, etc. Plastics are organic compounds, molecular contains a large number of combustible element such as carbon, hydrogen, some varieties of flammable, flame retardancy is poor. But if in the macromolecular structure containing halogen and nitrogen, phosphorus and sulfur atoms, or in the main chain structure containing aromatic ring type materials have certain flame retardant or self-extinguishing. General plastics combustion and flame retardant properties of available oxygen index.

flame retardant for products, in addition to outside can be selected according to the performance of the products flame retardant plastic varieties, also can be used to add flame retardant methods to achieve the purpose of flame retardant. According to the use of the products material is still essentially according to the performance of the products material, besides considering products application field in the selection, the use of the products should also be considered factors such as environment, force or using the object. Consider products using the environment and the performance of the stress state is considered products.

plastic are excellent dielectric, dielectric constant is small, but different plastic dielectric constant also have obvious difference. Nonpolar plastic relative dielectric constant in 1. 8 - 2. 5. Weak polarity plastic in 2. 5 - 3. Between 5, polarity plastic in 3. 5 - Between 8. As insulated wire and cable, etc. In order to reduce energy loss appropriate chooses plastic varieties, small dielectric constant is used as a capacitor can choose a larger varieties, dielectric constant is often used for capacitor is two-way stretch PP and PET film.

to facilitate according to injection molding products processing use material, can according to the different requirements of different application fields of plastic products divided into architecture, industrial plastic products, plastic packaging industry products, chemical industry, plastic products, household appliances, plastic products, agricultural plastic products, plastic products, automotive mechanical parts, plastic products, etc. ; Can also be divided by the function of the plastic material can satisfy different applications, such as structure material, corrosion resistant materials, optical materials, low friction materials.

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