Twin screw technology innovation: Efficient production of CaCO3 and PP injection molding fillers

Twin screw technology innovation: Efficient production of CaCO3 and PP injection molding fillers

With the rapid development of the plastics industry, the pursuit of environmental protection and cost-effectiveness is increasing, and the application of CaCO3 (calcium carbonate) and PP (polypropylene) as injection molding filler materials is more and more widespread.

In the process of plastic processing, temperature control is crucial. As an inorganic filler, CaCO3 usually exists in the form of micro-powder in PP, and its addition can improve the rigidity and heat resistance of the material. The processing temperature of PP is generally between 220 ° C and 260 ° C, and the addition of CaCO3 needs to be carried out in this temperature range to ensure good dispersion and compatibility.

CaCO3 and PP injection molding fillers are used in a wide range of applications, including but not limited to:

• Automotive industry: For the manufacture of lightweight and cost-effective automotive components.
• Electronics industry: Used to manufacture enclosures and brackets for electronic devices.
• Packaging materials: For the production of lightweight and good barrier properties of packaging materials.
• Construction industry: Used in the manufacture of thermal and acoustic insulation materials.

The working principle of twin-screw extruder extruding granulated CaCO3 and PP injection molding filler material

1. Feeding: The raw material enters the extruder through the feeding device.
2. Melting: The raw material is gradually melted through the heating section under the push of the screw.
3. Mixing: The special design of the twin screw makes the melt fully mixed under the rotating action of the screw, and the CaCO3 filler is evenly dispersed with the PP substrate.
4. Plasticization: The melt is further pushed by the screw to achieve a completely plasticized state.
5. Extrusion: The melt is extruded through the die head to form the desired shape.
6. Cooling and curing: The extruded material is cooled rapidly in the cooling device to form solid particles.
7. Granulation: The cured material is cut into particles of specified length by the granulation machine.

With its efficient production capacity and excellent material mixing performance, twin-screw extruders play an important role in the production of CaCO3 and PP injection molding filler materials. With the continuous advancement of technology, we expect more innovations and breakthroughs in this field to contribute to the sustainable development of the plastics industry.