What is Calcium Carbonate Filler Masterbatch?
Calcium carbonate filler masterbatch is made by mixing calcium carbonate and PP carrier. It is a kind of granule made by mixing calcium carbonate and carrier resin, which is similar to the volume of base resin of plastic products. It has a wide range of applications in the plastics industry. Surface modification of calcium carbonate powder prior to masterbatch processing can greatly improve cross-linking with the resin by increasing its dispersibility.

Applications and advantages
The main application of calcium carbonate filled masterbatch is to reduce production cost. Most of the calcium carbonate filler masterbatch in the market nowadays are made of inorganic powder or industrial waste, which are inexpensive and come from a wide range of sources, such as filler materials, adding appropriate additives and resins. Such as red mud + PVC, additives, etc., to produce flowerpot products. There are also glass beads screened from industrial waste of thermal power plants, which can be used as filling materials for injection molding products. While reducing production costs, it can also greatly improve the rigidity and impact strength of the product.
(1) Calcium carbonate filler masterbatch can reduce the cost of plastic products, improve production efficiency, and obtain good economic benefits.
(2) Calcium carbonate filled masterbatch can enhance the rigidity of plastic products and increase the weight of products.
(3) Calcium carbonate filler masterbatch can reduce the shrinkage of plastic products and reduce the deformation caused by shrinkage.
(4) Calcium carbonate filler masterbatch has good dispersion: it has good compatibility with polypropylene and polyethylene, so even if a large amount of filler is added, it can still obtain a good surface finish.
(5) Calcium carbonate filled masterbatch has high whiteness and can be flexibly formulated into various colors.
(6) In the processing of calcium carbonate filler masterbatch, the use of coupling agent, dispersant and other treatments can make the calcium carbonate filler masterbatch maintain good mechanical properties when the filler quantity is large.

The additives also include aluminate coupling agent, polymer wax dispersant, lubricant and so on.

Coupling agent
The purpose of adding coupling agent in the formula is to change the hydrophilicity of inorganic powder into lipophilicity, increase the compatibility with lipophilic resin, increase the thickness of the interface, and improve the performance of the filler material or reduce the influence on the performance of the filler material.

Dispersing agent
The role of the dispersant is to promote the uniform dispersion of the powder in the matrix. Different carriers can choose different dispersants. Waxes corresponding to the carrier resin are mainly used. PE wax or PP wax is used for PE, PP wax is used for PP, oxidized polyethylene wax is used for medium polar resins such as PS and ABS, and EVA wax is used for polar resins such as PC, PET and PA.

Lubrication
Internal lubrication can reduce the friction between materials and promote the fluidity of materials; external lubrication can reduce the friction between materials and equipments, reduce the scratches on the surface of the products, and ensure the surface brightness of color masterbatches and filled products.

Stabilizer
It is better to add calcium and zinc compound stabilizer, but due to the price, zinc stearate is usually added as heat stabilizer, which can also play the role of internal lubricant.

Antistatic agent
It can eliminate the static electricity of high-speed mixed materials in time, and also provide anti-static effect for the subsequent products.

Plastic + Calcium Carbonate Highly Filled Granulator Process Flow
Internal mixer mixing can achieve the best effect of uniform dispersion. The pressurized and sealed mixing tank ensures unique mixing quality and prevents carbon black dust from polluting the environment.
The dense material from the refiner is conveyed by an elevator and poured into the conical twin-screw force feeder.
A parallel co-rotating twin-screw extruder is used as a mixing unit. In the processing of polymer materials, various modification processes of polyolefin materials and engineering plastics, masterbatch formulation, etc. require a powerful mixing process. This mixing process varies depending on the material system. Excellent equipment performance, reasonable mixing process, advanced combination process and rich processing experience is the key to determine whether the mixing process is successful and effective. The low rotational speed of single-screw extruder avoids over-shearing phenomenon, and the internal cooling system of screw can avoid overheating and has strong heat exchange capacity.
The fast screen change of hydraulic plate type automatic screen changing device will not affect the normal operation of the machine.

Nanjing GSmach Extrusion Equipment Co., Ltd. is a high-tech enterprise specializing in the technology development and production of polymer blending and modification equipment and related processes and engineering fields with the coaxial rotary twin-screw extruder as the core. We keep pace with the international standard in technology development and innovation. In addition to twin-screw extruders, we also have various types of three-screw extruders with better dispersing effect, which can replace the internal mixer. In addition, processes such as calcium carbonate filler masterbatch have wide applicability. Customers can use the original processing equipment and production process for production.

Recommended Extruders for Caco3 Filler Masterbatch
The machine model is mainly determined according to the customer's production capacity. The higher the L/D ratio of the twin screw extruder, the better. Usually greater than 40 is required to be cost effective. Generally, 52 mm, 65 mm and 75 mm twin-screw extruders are preferred by customers. Three-screw extruders of 52 mm, 65 mm and 75 mm provide higher output and better mixing results than twin-screw extruders of the same size.