Collection! Composite current collector industry research report

2024-08-26

The function of the current collector is to carry the active material. During the charging and discharging process, the current generated by the current collector is collected and output or the current is input to the active material as a medium to realize the conversion of chemical energy and electrical energy.

What are the processing technology of filling masterbatch

2024-07-17

Polyolefin filling masterbatch processing technology and related equipment with the carrier resin changes. The carrier resin used in the first generation of polyolefin filling masterbatch (APP masterbatch) is domestic random polypropylene (actually a by-product of polypropylene production). The processing technology is: mixing-opening and pulling-water-cooled pelletizing. It is intermittent production. The equipment used includes internal mixer, open mill and flat pelletizer. The second generation polyolefin filler masterbatch is LDPE(1F7B) as the carrier resin, and the masterbatch produced is called PEP masterbatch. In order to obtain better effect, a specially designed single screw extruder with large aspect ratio and high mixing performance must be used in the process. The filler masterbatch with polypropylene powder as the carrier, that is, PPM masterbatch, is called the third generation of filler masterbatch in China. The general use of polypropylene and polyethylene blends as a carrier resin approach, the effect will be very good. The product not only maintains the characteristics and scope of use of PPM masterbatch, but also adopts the hot air cooling process of the mold surface, which improves the production efficiency and reduces the cost of raw materials. The best processing equipment for making filled masterbatches is the same rotating twin screw extruder. The advantages of this machine are continuous production, stable quality, high production efficiency, low energy consumption, low labor intensity and good operating environment. The concentration of fillers and additives is large, and a certain amount of matrix resin must be added after mixing and then processed and molded, and the filler mainly plays a filling role. Fillers and additives can give plastic products special functions, such as: light, electricity, flame retardant, degradation, etc., called functional filling masterbatch. Functional masterbatch usually includes color masterbatch, light conversion masterbatch, high-efficiency insulation film masterbatch, anti-fog masterbatch and degradation masterbatch. It is a special granule for coloring plastic products. It can be divided into polyolefin, ABS, PS and AS according to the colored plastic varieties. The production process of color masterbatch is usually divided into two steps: The first step is to prepare a pigment pre-dispersion, I .e., surface treatment of the pigment with a dispersant or other additives; The second step is to melt and granulate the pigment pre-dispersion with the carrier resin to obtain the color masterbatch. Color masterbatch is composed of pigment, dispersant, carrier resin and appropriate amount of additives. The main function of the dispersant is to fully disperse the pigment and uniformly disperse it in the carrier resin and the matrix resin, and finally obtain a plastic product with uniform color. The carrier resin used for the color masterbatch should first have good compatibility with the colored resin, and secondly, the fluidity of the carrier resin should be greater than that of the colored resin, so that the pigment can be better dispersed. The composition of the color masterbatch, the selection and amount of the pigment depend on the nature of the colored plastic, and the content of the pigment in the color masterbatch usually used for the coloring of polyolefin plastics is 20% to 40% (mass fraction).