PCABS American MDI fire retardant-Zigong

2021-09-01by admin

PA66 application

High temperature electrical socket parts, electrical parts, gears, bearings, rollers, spring brackets, pulleys, bolts, impellers, fan blades, propellers, high-pressure sealing gaskets, valve seats, oil pipes, oil storage containers, ropes, cable ties, transmission belts , Grinding wheel adhesives, battery boxes, insulated electrical parts, wire cores, wire drawing, etc. The company also provides long-term supply of PA66, PP, PA6, PA66, PBT, PEI, PET, PMMA, POM, PPS and other public sources of sufficient supply and complete varieties. , The price is reasonable. .

PC/ABS American MDI Fire Retardant and Flame Retardant-Zigong
Now OEM manufacturers are using this material, which complies with the new food materials directive. The total value of imported resin in the first six months of 2016 was 126.9 billion), a decrease of 10.2% over the same period last year. During the same period, domestic resin output increased by 7.7% to 39.8 million tons.

PC/ABS American MDI Fireproof and Flame Retardant-Zigong If there is insufficient ventilation, these decomposition products sometimes accumulate and cause health damage, so proper ventilation should be used. In order to prevent thermal decomposition, initiation of gas, and internal pressure of the barrel, the temperature of grades A, B, C, D/grade Ei/grade T, and S should be controlled below 350℃/370℃/385℃. Since these temperatures are much higher than the ordinary molding temperature, it is not necessary to heat to such a high temperature.

PC/ABS American MDI fire retardant-Zigong

PA66 performance

PA66 plastic raw material is a semi-or non-crystalline polymer with plasticity. The density is 1.15g/cm3. The melting point is 252°C. The embrittlement temperature is -30℃. The thermal decomposition temperature is greater than 350°C. Continuous heat resistance of 80-120℃, equilibrium water absorption rate of 2.5%. It is resistant to acid, alkali, most inorganic salt solutions, halogenated alkanes, hydrocarbons, esters, and other corrosion, but it is easily soluble in polar solvents such as
and formic acid. It has excellent wear resistance, self-resistance, and high mechanical strength. But the water absorption is large, so the size is poor

PA66 is a mechanically strong and widely used variety in the PA series. Because of its high crystallinity, its rigidity and heat resistance are high.

Edit this section of chemical and physical properties

PC/ABS American MDI Fire Retardant and Flame Retardant-Zigong
Take down the mold cavities that are continuous, larger or smaller than the average, so as to check whether the size of the mold is correct. Record and analyze the data as the need to modify the mold and production conditions, and as a reference for future mass production. 1. Make the processing operation time longer, according to the temperature of the melt and the temperature of the hydraulic oil. 2. According to the size of all finished products that are too large or too small, depending on the machine conditions, if the shrinkage rate is too large and the finished product appears to be insufficient to shoot, you can also refer to the gate size.

PC/ABS American MDI fire-retardant and flame-retardant-Zigong, because the melted thermoplastic viscosity is too high, the control is not good, the fabric or yarn cannot be impregnated well, which affects its performance. 2. The fluidized bed impregnation method, the fiber or fabric passes through a powder In a fluidized bed, the powder is suspended in one or more airflows, and the airflow passes through the fibers under a controlled pressure, and the powder carried is deposited on the fibers.

PA66 has a higher melting point in polyamide materials. It is a semi-crystalline-crystalline material. PA66 can maintain strong strength and rigidity even at higher temperatures. PA66 still has hygroscopicity after molding, the degree of which mainly depends on the composition, wall thickness and conditions of the material. In product design, the influence of moisture absorption on geometry must be considered.

For the mechanical properties of PA66, various modifiers are often added. Glass is a common additive, and sometimes synthetic rubber, such as EPDM and R, is added for impact resistance.

PA66 has low viscosity, so it has good fluidity (but not as good as PA6). This property can be used to process very thin components. Its viscosity changes very much with temperature. The shrinkage rate of PA66 is between 1%~2%, adding glass fiber additives can reduce the shrinkage rate to 0.2%~1%. The shrinkage rate differs greatly in the direction of the flow and the direction perpendicular to the direction of the flow.

PC/ABS American MDI Fireproof and Flame Retardant-Zigong
2, PC basic properties, proportion: 1.18-1.20g/cm, molding shrinkage: 0.5-0.8%, molding temperature: 230-320℃, drying conditions: 110-120℃, 8 Hourly material performance has high impact strength, good size, colorless, good electrical insulation, corrosion resistance, and wear resistance, but it has poor self-property, has a tendency to stress cracking, is easily hydrolyzed at high temperature, and has poor compatibility with others.

PC/ABS American MDI Fireproof and Flame Retardant-Zigong
The corrosion resistance of the two is similar, but the temperature resistance of PFA is not as good as PTFE in actual use. PFA material may bubble under the action of high temperature water; the impermeability of PTFE Better than PFA, but the gap is not big. Two: PTFE has better corrosion resistance and higher temperature resistance, but it is not as easy to process as PFA. Three: For conventional acid-base salt solutions, the corrosion resistance of PTFE and PFA are similar, but for some specific media, you need to check the material corrosion manual.