Publish Time: 2008-05-14 Origin: Site
For ultra-high molecular weight polyethylene (UHMWPE) conductive composite materials, a series of studies were carried out on the positive temperature effect (PTC effect) and self-heating properties of composite materials by DSC, SEM, electrical conductivity, self-heating and other testing methods. The results show that the percolation threshold of the composite material is 3%, which is much lower than that of the general carbon black and carbon fiber filled conductive composite materials.
The gamma ray radiation treatment greatly increases the PTC strength of the composite material, reaching 1010, which eliminates the instability of the material's electrical conductivity at high temperatures and improves the thermal repeatability of the PTC effect. However, the change of gamma ray radiation on the surface temperature of the composite material with the radiation dose is consistent with the change of the crystallinity of UHMWPE. SEM images show that gamma ray radiation effectively improves the interfacial compatibility of the composites. Therefore, UHMWPE/NiCF composites have potential application prospects as PTC self-heating materials. Ultra-high molecular weight polyethylene sheet has ultra-high mechanical properties, which are higher than ordinary high-density polyethylene products. use below.
The use of ultra-high molecular weight polyethylene board in the unloading chute of the mixer truck: the inner wall of the mixer truck must be lubricated, non-adhesive, flame-retardant high-molecular-weight polyethylene board, and wear-resistant and easy to clean, polyethylene board is a kind of It is more suitable for the material of the inner wall, uhmw-pe high molecular polyethylene board, the mixer truck uses it, the agitator inside can easily fall off and does not stick to the inside, the high molecular polyethylene board manufacturer will not work for the next step bring obstacles. The service life of high molecular polyethylene board is higher than that of steel, and it is 3-7 times that of carbon steel and stainless steel.
In order to prolong the service life of the unloading chute of the mixer truck, reduce the manufacturing cost of the mixer truck, reduce the self-quality of the mixer truck, and also reduce the fuel consumption for the user, and realize the reduction of the cost during the use of the vehicle, the author based on the various polyethylene sheets provided by domestic manufacturers. According to the index, the mixer truck discharge chute of polyethylene plate is designed. The impact resistance, impact energy absorption, wear resistance and environmental protection of this material all exceed those of steel chutes, and it is a lightweight design material that replaces steel chutes. The impact resistance, impact energy absorption, wear resistance and environmental protection of this material all exceed those of steel chutes, and it is a lightweight design material that replaces steel chutes.
Steel unloading chute structure of mixer truck The unloading chute on the concrete mixer truck (hereinafter referred to as the mixer truck) is a part of the unloading system of the mixer truck, which bears the impact and friction of the concrete for a long time. If the designed unloading chute is too thin, It will cause premature damage. Due to the design defects of some discharge chutes, the service life is not more than half a year, which will bring users a lot of troubles in the use of vehicles. Polyethylene linings help you relieve troubles.