Warm Global Customers
With China Plastic Machinery
With China Plastic Machinery
PSU plastic (Polysulfone) refers to a polymer compound with sulfone groups and aromatic nuclei in the main chain of the macromolecule. It is a high-performance thermoplastic engineering plastic developed by UCC in the United States and entered the market in 1965. It is a typical amorphous polyaryl ether. The heat deformation temperature of PSU plastic is as high as 174¡æ, and the density is 1.25-1.35 grams per cubic centimeter. It has the characteristics of high modulus, high strength, high hardness, low creep, heat resistance, cold resistance, and aging resistance.
The structure of PSU plastic contains highly conjugated diphenylsulfone groups, whose atomic positions are fixed, so it has high rigidity and hardness, is not easy to break and creep, and the diphenylpropane group makes PSU plastic have good flexibility and toughness. Therefore, PSU plastic has excellent comprehensive properties. It can be used for a long time at minus 100-150¡æ, has good electrical insulation in water, humid air or high temperature, has good chemical stability, can be electroplated, and is often used in the production of certain military parts.
PSU plastics have a wide range of applications: often used in medical devices, can be used for medical containers that are repeatedly sterilized, etc.; food processing equipment, including pipes, milk processing equipment, microwave ovens, and beverage cans; chemical industry, used for corrosion-resistant pipelines, filling rings for chemical towers, chemical pumps and filters, as well as support frames and diaphragms; electronic appliances, suitable for making printed circuit boards, chip capacitors, connectors, coil skeletons, contactors and other electronic and electrical product parts.
Specific gravity: 1.25-1.35 g/cm3 Molding shrinkage: 0.5-0.7% Molding temperature: 290-350¡æ Drying conditions: 130-150¡æ 4 hours
1Resistant to corrosion by inorganic acids, alkalis and salts, but not resistant to aromatic hydrocarbons and halogenated hydrocarbons. Polyarylsulfone has high hardness, radiation resistance, good heat and cold resistance, and self-isolation, and can be used for a long time at -100-175 degrees.
2. The wear resistance of the material can be greatly improved by glass fiber reinforcement modification.
3. Polysulfone can be made into modified products of polysulfone with ABS, polyimide, polyetheretherketone and fluoroplastics, mainly to improve its impact strength and elongation, solvent resistance, environmental resistance, processing performance and electroplating performance. Such as PSF/PBT, PSF/ABS, PSF+mineral powder. 1. Suitable for making heat-resistant parts, insulating parts, wear-reducing and wear-resistant parts, instrument parts and medical equipment parts, polyarylsulfone is suitable for making low-temperature working parts.
2. Polysulfone is often used in the manufacture of integrated circuit boards, coil racks, contactors, sleeves, capacitor films, and high-performance alkaline battery shells in the electronic and electrical industry.
3. Polysulfone is used in household appliances for microwave oven equipment, coffee heaters, humidifiers, hair dryers, cloth steam dryers, beverage and food dispensers, etc. It can also replace non-ferrous metals for precision structural parts of clocks, copiers, cameras, etc.
4. Polysulfone has passed the relevant specifications in the field of medicine and food in the United States and can replace stainless steel products. Due to the characteristics of polysulfone such as steam resistance, hydrolysis resistance, non-toxicity, high temperature steam sterilization resistance, high transparency, and good dimensional stability, it can be used as surgical tool trays, sprayers, fluid controllers, heart valves, pacemakers, gas masks, dental trays, etc.
Molding performance 1. Amorphous material, high moisture absorption, water absorption rate of 0.2%-0.4%, must be fully dried before use, and prevent re-absorption of moisture. Ensure that the water content is below 0.1%.
2. The molding performance is similar to PC, with poor thermal stability and begins to decompose at 360 degrees.
3. Poor fluidity, fast cooling, suitable for high temperature and high pressure molding. The mold should have sufficient strength and rigidity, set a cold well, the runner should be short, and the gate size should be 1/2-1/3 of the wall thickness of the plastic part.
4. In order to reduce the internal stress of the injection molded product, the mold temperature should be controlled at 100-140 degrees. After molding, annealing treatment can be adopted: glycerol bath annealing treatment, 160 degrees, 1-5 minutes; or air bath annealing treatment, 160 degrees, 1-4 hours. The annealing time depends on the size and wall thickness of the product.
5. Polysulfone is close to Newtonian body in molten state, similar to polycarbonate, and its fluidity is sensitive to temperature. Within 310 degrees - 420 degrees, the fluidity increases by 1 times for every 30 degrees increase in temperature. Therefore, the processing fluidity is mainly improved by increasing the temperature during molding.
PSU is widely used. In the field of electronics and electrical engineering, PSU can be used to make various electrical parts such as contactors, connectors, transformer insulators, thyristor caps, insulating sleeves, coil skeletons, terminals and collector rings, printed circuit boards, bushings, covers, TV system parts, capacitor films, brush holders, alkaline battery boxes, etc.; in the fields of automobiles and aviation, PSU can be used to make protective cover components, electric gears, battery covers, detonators, electronic ignition device components, lamp components, aircraft interior accessories and aircraft exterior parts, spacecraft external protective covers, etc. It can also be used in PSU to make lighting baffles, electric transmission devices, sensors, etc. The demand for polysulfone polymers used to make cabin parts in the world market continues to grow, mainly because these polymers release less heat and produce less smoke when burning, and less toxic gas diffusion, which fully meets the use requirements of safety regulations; in the kitchenware market, PSU can replace glass and stainless steel products to make steam dinner plates, coffee containers, microwave cookers, milk and agricultural product containers, egg cookers and milking machine parts, beverage and food dispensers and other products. PSU is a non-toxic product and can be made into utensils that come into repeated contact with food. As a transparent new material, PSU is better than any other thermoplastic in terms of hot water resistance and hydrolysis stability, so it can be used to make coffee pots, etc. Connecting pipes made of PSU are used for glass fiber or glass fiber reinforced polyester wall cladding. The outer layer of the pipe is high in strength, the inner layer of the pipe is resistant to chemicals, lighter than steel pipes, and transparent, easy to control, and often used in the food industry and the production of high-intensity lamps; in terms of health and medical equipment, PSU can be used to make surgical trays, sprayers, humidifiers, contact lens fixtures, flow controllers, instrument covers, dental instruments, liquid containers, pacemakers, respirators and laboratory equipment. PSU is used to make various medical products at a lower cost than glass products and is not easy to break, so it can be used for instrument housings, dental instruments, heart valve boxes, blade cleaning systems, soft contact lens molding boxes, micro filters, dialysis membranes, etc. PSU can also be used for dental implants, and its bonding strength is twice as high as acrylic acid; in terms of daily necessities, PSU can be used to make humidifiers, hair dryers, clothing steamers, camera boxes, projector components and other heat-resistant and hydrolysis-resistant products. PSU pellets that have been irradiated with 0.4-1.6MGy and well dried can be easily injection molded at 310¡æ and mold temperature 170¡æ. They are suitable for adhesives for laminated materials. All polysulfones with silane, such as PSU-SR and PKXR, can be used as adhesives for sizing glass fiber and graphite fiber to make composite materials. PSU with silane groups reinforced with graphite fabric can be used to make aircraft parts such as elevators. After adding solid lubricant polytetrafluoroethylene, PSU can increase wear resistance and physical and mechanical properties, and is also used to prepare wear-resistant coatings; in addition, PSU can also be used to manufacture various chemical processing equipment (such as pump covers, tower outer protective layers, etc.), food processing equipment, pollution control equipment, dairy processing equipment, and pipelines for engineering, construction, and chemical industry.
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