Grafting material(compatibilizers) pelletizing line
Graft compatibilizers give polarity and adhesion to the polymer(such as PE, PP, POE etc) mainly through the action of a maleic anhydride (MAH) group or a glycidyl methacrylate (GMA) group. Improve the interfacial bonding force between the polymer and glass fiber, calcium carbonate and other inorganic fillers, the plant fibers such as wood powder, straw etc, thereby significantly improving the mechanical properties of the composite material.
The main raw materials for the production of graft compatibilizer are: resin, graft monomer, initiator and other additives, through the heating and shearing in the extruder, the grafting monomer is grafted with the polymer under the action of the initiator.
Equipment Characteristics
1. High torque extruder. It is suitable for high melt viscosity of graft material.
2. Adopt Loss-in-weight feeding system, feed the resin granules, processing additives and diluted initiator liquid steply to meet the high accurate requirement to proportion of the initiator and polymer.
3. The barrel and screw with large L/D: L/D=48:1~52:1, provide longer residence time, which is conducive to the completion of melting homogenization and grafting reaction, and 1~2 sections of vacuum degassing barrel is equipped to eliminate by-products in reaction to reduce product odor.
4. The pelletizing method is selected according to the melt characteristics. Different raw materials and ratios in the formulation have large differences in melt characteristics. The higher hardness products can select water cooling strand pelletizer, and the low-viscosity and easy-adhesive products can adopt under water pelletizer.
