Engineering plastics modification equipment Plastic sheet production line
DATE：2021/2/28 8:35:55 / READ： / SOURCE：This station
Engineering plastics modification equipment
Plastic sheet production line
Engineering plastics modification equipment and technology can obtain high quality and high quality, and it is an important factor to prepare high performance engineering plastics modification special materials. A good, stable and low cost material. Good technology must have good equipment support, but only good equipment, not necessarily can produce high-performance engineering plastics materials, but also must have good technology to cooperate. Therefore, engineering plastics modification process and equipment are complementary. Plastic sheet production line www.handern.comWithin the product, each component is refined and distributed again without essential changes in its basic unit. According to brodkey's mixing theory, mixing involves three basic motion forms of diffusion: molecular diffusion and vortex diffusion. Mixing is an operation process that tends to reduce the non-uniformity of mixture, or mixing is two kinds of mixing: distributed mixing and dispersed mixing in the whole system. In the dispersion mixing, the particle size decreases and the position changes, while the distribution mixing only increases the random degree of spatial arrangement, but does not reduce the size of structural units. In the actual mixing process, dispersion mixing and distribution mixing often occur at the same time.
According to the classification of Japanese scholar Yamaoka yasutai, the mixing elements of viscous fluid are divided into compression, shear and displacement. The whole mixing and dispersing process is completed by these three elements repeatedly. The role of shear is to disperse high viscosity particles or aggregates in the dispersion medium. Shear is the most important in the dispersion process of high viscosity particles. Plastic sheet production line www.handern.com
Talc powder is pure white, silver white, pink or light yellow fine powder, insoluble in water, chemical properties are not active, soft and greasy, is a typical plate filler. Its crystal belongs to monoclinic system, which is hexagonal or rhombic in shape, and often forms flake, scaly or dense massive aggregate. The chemical composition of talc powder is hydrous magnesium silicate, and its molecular formula is 3mgo · 4SiO: · H: o. The Natural talc powder can be made by crushing, grinding and grading. The chemical composition of talc powder in China is as follows: s058% ~ 62%, MG08% ~ 31%, loss on ignition 4.5% ~ 6%, other impurities Cao 1.5%, fezo 0.04%, alo 0.3%.
Talc has a layered structure, and the adjacent two layers are combined by weak van der Waals force. Under the action of external force, the adjacent two layers are good, which has a certain enhancement effect. Talc powder can improve the stiffness and creep resistance of engineering plastics at high temperature. When sliding, it is easy to slip or separate from each other. Because of the flake structure of talc powder, some properties of talc powder filled plastics have been greatly changed into large pieces, so the stiffness of plastics has been significantly improved in a specific direction. At the same time, talc powder can significantly improve the performance of filled plastics. When the talc powder particles are arranged along the flow direction of processed materials, the arrangement is basically flaky according to the principle of minimum resistance. The heat resistance of small pieces can give the filled plastics low molding shrinkage. Plastic sheet production line www.handern.com
The main characteristics of talc powder are as follows: the density is 1.7 ~ 1.8g/cm; the Mohs hardness is 1, which is the lowest among the mineral fillers; it has a soft and greasy feeling; it has white, gray, yellow, pale blue, pale green, milky white, light gray and silver like or crystal water.
Author：admin