Acrylonitrile butadiene styrene AKA Abs Resin (chemical formula (C8H8)x·(C4H6)y·(C3H3N)z) is a common thermoplastic polymer. Its glass transition temperature is approximately 220 °F (104 °C). ABS is amorphous and therefore has no true melting point.
Abs Repair Resin is a terpolymer made by polymerizing styrene and acrylonitrile in the presence of polybutadiene Rubber And Plastic. The proportions can vary from 15% to 35% acrylonitrile, 5% to 30% butadiene and 40% to 60% styrene. The result is a long chain of polybutadiene crisscrossed with shorter chains of poly(styrene-co-acrylonitrile). The nitrile groups from neighboring chains, being polar, attract each other and bind the chains together, making ABS stronger than pure polystyrene. The acrylonitrile also contributes chemical resistance, fatigue resistance, hardness, and rigidity, while increasing the heat deflection temperature. Abs Plastic Resin gives the plastic a shiny, impervious surface Ethylene-Vinyl Acetate, as well as hardness, rigidity, and improved processing ease. The polybutadiene, a rubbery substance, provides toughness and ductility at low temperatures Pvc Resin, at the cost of heat resistance and rigidity. For the majority of applications, ABS can be used between −20 and 80 °C (−4 and 176 °F), as its mechanical properties vary with temperature. Abs Casting Resin properties are created by rubber toughening, where fine particles of elastomer are distributed throughout the rigid matrix.
Abs Resin,Abs Repair Resin,Abs Plastic Resin,Abs Casting Resin HENAN LIHAO CHEM PLANT LIMITED , https://www.lihaoche.com
The reason for the damage of LED lamps in China Building Materials Network is that the failure of LED lamps comes from the failure of power supply and drive, and the failure of LED devices themselves. Often the damage to the LED power supply and drive comes from the over-current surge (EOS) of the input supply and the open-circuit fault at the load. The over-current shock of the input power source often causes damage to the driver chip in the driver circuit and breakdown damage of passive components such as capacitors. A short-circuit fault at the load end may cause over-current drive of the drive circuit, and the drive circuit may be damaged by short-circuit or short-circuit fault. There are several main reasons for the failure of the LED device itself. A transient overcurrent event is when the current flowing through the LED exceeds the maximum rated current in the LED technical data sheet. This may be due to a large current directly generated or indirectly generated by a high voltage, such as a transient lightning strike or a switching power supply. Overcurrent caused by overvoltage events such as state switching noise and grid fluctuations. These events are transient and have a very short duration. Usually we call them spikes such as current spikes and voltage spikes. The transient overcurrent event also includes the LED being powered on or the transient overcurrent when plugged in. For LED lighting in cars, the transient load dump surge of ISO7637-2 is an important threat to its normal operation. The failure mode of an LED after an electrical shock is not fixed, but it usually causes damage to the weld line, as shown in Figure 1. This damage is usually caused by a very large transient overcurrent. In addition to causing the weld line to blow, it may also cause damage to other parts of the weld line, such as sealing material.