New developped PVC extrusion profile for power socket rail
others
PPS
by：CSSSLD
2021-01-23
PI molecular structure while there are a number of polar groups, but because of big rigidity, symmetrical structure, can form coexist, make the polarity are greatly weaken and restrictions, and electrical insulation is very good, these performance in relatively wide temperature range and high frequency electric field can remain stable.
Injection tooling PI in self-extinguishing polymer, low smoke.
PI, non-toxic, used to make tableware, withstand thousands of disinfection.
Some varieties of PI but also has good biocompatibility.
70% of PPS molecular mechanism of aromatic ring, 30% for sulfur, therefore, flame retardant performance, the oxygen index of more than 40, material processing again and again also won't lose flame retardant ability, is one of the plants with the highest combustion safety to the plastic. Appearance on PPS is usually white powdery, bibulous rate is less than 0. 03%. Due to the impact toughness of PPS is poor, low extension, and difficult forming process characteristic, more commonly used as engineering plastics is the modified varieties, such as with PA, PTFE PSU blending, but also with other monomer copolymerization and so on.
does not fill the PI plastic tensile strength is more than 100 mpa, some species can reach more than 200 mpa, and as a rigid mechanical tensile modulus of elasticity of up to 3 - After 4 gpa, fiber reinforced up to 200 gpa, superior to other engineering plastics. In addition, the PI also has excellent creep resistance and abrasion resistance, can be used as heat resistant, wear resistant engineering plastics. PI has outstanding resistance to high and low temperature performance, thermal deformation temperature as high as 360 ℃, can in - 269 - Between 400 ℃ high mechanical strength, long-term use of temperature for - 240 - 260 ℃, can continuous use 70000 h under 250 ℃.
PPS can use methods such as injection molding, extrusion, mould, spray forming, some species can also blow moulding. Injection molding for 10 - with MFR in general 100 g / 10 min PPS, process parameters as follows: 280 - cylinder temperature 350 ℃, the injection pressure is 70 - 140 mpa, the mold temperature is 120 - 200℃。 Of glass fiber reinforced PPS can be appropriately raise the temperature and pressure. PPS has excellent comprehensive performance, and the price is moderate, in electronic appliances, automobiles, machinery, aerospace and other fields is widely used.
PPS yield is about 35% 50% used in electrical field, mainly for the production of connectors, car needs some heat resistant, oil resistant and lightweight high strength components. Polyimide is macromolecular main chain structure containing imide group of aromatic heterocyclic polymers, industrialize production in the early 1960 s, is currently one of the best varieties of special engineering plastics in the heat. PI, generally by the binary acid and diamine synthesis, according to different raw material variety, the current application of the main varieties are thermosetting polyimide, thermoplastic polyimide and modified polyimide.
PPS with high stiffness and creep resistance, but large brittleness, low notched impact strength. Generally, the blend can be used to enhance the methods to improve the impact toughness. Molecular structure of PPS is symmetrical, nonpolar, bibulous rate is low, can under the condition of high temperature, high humidity, high frequency, show the excellent electrical properties. Outstanding resistance to chemical corrosion is one of the PPS excellent properties, chemical stability and PTFE, except by oxidizing acid erosion, are relatively stable for other chemicals. In any known solvents under 205 ℃ can't dissolve it.
different species and varieties of PI with different structure characteristics, in terms of its universality, macromolecular main chain contains a lot of five yuan nitrogen heterocyclic aromatic ring and a certain number of ether bond, injection molding processing plant material is shown on the overall structural stability, rigidity, heat resistance, good characteristic. In terms of different varieties of structural differences, some of the molecular chain of symmetry, some asymmetric, so, some have certain crystalline in the PI, some for functional, at the same time some insoluble not melt in thermosetting, some having meltability and for thermoplastic. PI structural diversity and uniqueness, showed a very prominent in all aspects of performance.
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70% of PPS molecular mechanism of aromatic ring, 30% for sulfur, therefore, flame retardant performance, the oxygen index of more than 40, material processing again and again also won't lose flame retardant ability, is one of the plants with the highest combustion safety to the plastic. Appearance on PPS is usually white powdery, bibulous rate is less than 0. 03%. Due to the impact toughness of PPS is poor, low extension, and difficult forming process characteristic, more commonly used as engineering plastics is the modified varieties, such as with PA, PTFE PSU blending, but also with other monomer copolymerization and so on.
does not fill the PI plastic tensile strength is more than 100 mpa, some species can reach more than 200 mpa, and as a rigid mechanical tensile modulus of elasticity of up to 3 - After 4 gpa, fiber reinforced up to 200 gpa, superior to other engineering plastics. In addition, the PI also has excellent creep resistance and abrasion resistance, can be used as heat resistant, wear resistant engineering plastics. PI has outstanding resistance to high and low temperature performance, thermal deformation temperature as high as 360 ℃, can in - 269 - Between 400 ℃ high mechanical strength, long-term use of temperature for - 240 - 260 ℃, can continuous use 70000 h under 250 ℃.
PPS can use methods such as injection molding, extrusion, mould, spray forming, some species can also blow moulding. Injection molding for 10 - with MFR in general 100 g / 10 min PPS, process parameters as follows: 280 - cylinder temperature 350 ℃, the injection pressure is 70 - 140 mpa, the mold temperature is 120 - 200℃。 Of glass fiber reinforced PPS can be appropriately raise the temperature and pressure. PPS has excellent comprehensive performance, and the price is moderate, in electronic appliances, automobiles, machinery, aerospace and other fields is widely used.
PPS yield is about 35% 50% used in electrical field, mainly for the production of connectors, car needs some heat resistant, oil resistant and lightweight high strength components. Polyimide is macromolecular main chain structure containing imide group of aromatic heterocyclic polymers, industrialize production in the early 1960 s, is currently one of the best varieties of special engineering plastics in the heat. PI, generally by the binary acid and diamine synthesis, according to different raw material variety, the current application of the main varieties are thermosetting polyimide, thermoplastic polyimide and modified polyimide.
PPS with high stiffness and creep resistance, but large brittleness, low notched impact strength. Generally, the blend can be used to enhance the methods to improve the impact toughness. Molecular structure of PPS is symmetrical, nonpolar, bibulous rate is low, can under the condition of high temperature, high humidity, high frequency, show the excellent electrical properties. Outstanding resistance to chemical corrosion is one of the PPS excellent properties, chemical stability and PTFE, except by oxidizing acid erosion, are relatively stable for other chemicals. In any known solvents under 205 ℃ can't dissolve it.
different species and varieties of PI with different structure characteristics, in terms of its universality, macromolecular main chain contains a lot of five yuan nitrogen heterocyclic aromatic ring and a certain number of ether bond, injection molding processing plant material is shown on the overall structural stability, rigidity, heat resistance, good characteristic. In terms of different varieties of structural differences, some of the molecular chain of symmetry, some asymmetric, so, some have certain crystalline in the PI, some for functional, at the same time some insoluble not melt in thermosetting, some having meltability and for thermoplastic. PI structural diversity and uniqueness, showed a very prominent in all aspects of performance.
more excellent articles: plastic polysulfone, click directly.
http://www。 csssld。 cn//html/2017/Info_1024/707。 HTML
changshu smoothly da plastic products factory website: http://www. csssld。 Cn /
more wonderful articles, immediately search: changshu da plastic products factory smoothly
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