High Filler Calcium Powder: What Role Does It Play In Plastics Formula?

Date:2022-5-25 Author:hcscrew

filler calcium carbonate in pvc pp pe 750X500

High filler calcium powder is a term we often use when referring to the extrusion of plastic products. However, what does calcium powder really mean? Calcium carbonate is the miracle calcium powder. For the formulation of plastic products, manufacturers use surface-modified calcium powder, which is calcium carbonate. In order to increase calcium carbonate applications’ performance, applicability, and market, surface modification is an essential tool. The amount of calcium carbonate added is also categorised as high filled calcium carbonate and low filled calcium carbonate. There are plastic products that can benefit from modified calcium carbonate.

1、Polyvinyl chloride (PVC)

Modified calcium carbonate, compared to ordinary calcium carbonate, particles to the original ecological particle state of uniformly distributed particles, without clumping. PVC resin has excellent dispersion and compatibility, easy plasticization, and non-stick rollers, conducive to improving processing efficiency. And the product’s breaking strength and elongation at break significantly increased. Both in physical and mechanical properties.

2、Polyvinyl chloride (PVC) fire hose

If we compare modified calcium carbonate particles with ordinary calcium carbonate particles, modified calcium carbonate particles are typically evenly distributed in the state of primary particles rather than aggregates. Some of which exist in nanoparticle form. So that, when we insert polyvinyl chloride (PVC) fire hoses, not only can we improve the processing properties of the system, but also give the product better physical and mechanical properties, in order to strengthen and toughen.

3、PVC cable material and flame retardant masterbatch

This heavy calcium carbonate composite filler consists of aluminate, titanate coupling agent, stearic acid modified heavy calcium carbonate, and stearate-modified heavy calcium carbonate for use in the preparation of PVC cable material and flame retardant masterbatch. This product provides excellent performance. The use of composite modifiers will become a trend in heavy calcium carbonate surface modification.

4、PVC coated fabrics

Heavy calcium carbonate that has been modified can increase the compatibility of a PVC paste resin compounding method. In the case of the same amount of regular heavy calcium, a relatively low viscosity may be obtained, enhancing the bonding action with polyester base fabric. It can also lessen the amount of glue used. At the same time, it can improve the appearance of the covering substance. In the case of a 40% increase in usage, the material’s processing qualities, physical and mechanical capabilities, and thermal welding properties have no negative consequences.

5, high-density polyethylene (HDPE)

The employment of aluminate coupling agent in the calcium carbonate particles on the surface of a specified bonding, considerably increased calcium carbonate particle dispersion. The quantity of modified calcium carbonate added to high-density polyethylene (HDPE) reduced abrasion and friction work while improving anti-friction performance. The composite mechanical characteristics are 8phr. Tensile strength and impact strength improved by 4.46% and 24.57%, respectively.

6、Low density polyethylene (LDPE)

The modified calcium carbonate has a 99.71% activation index. The oil absorption value was 46.19mL/100g. The settling volume was 2.3mL/g at the end. The combination of 10g of modified calcium carbonate and 100mL of liquid paraffin had a viscosity of 4.4 Pa-s. Filling Low Density Polyethylene(LDPE) with Modified Calcium Carbonate. When the adjusted calcium carbonate percentage is 10%, the composite material exhibits good mechanical characteristics.

7、Polypropylene (PP)

The surface of light calcium carbonate is modified using the coupling agent tetrahydrofuran homopolymer ether (PTHF). It may lower the oil absorption value of calcium carbonate by 22% and the contact angle by 68.6°. The modified calcium carbonate was put into polypropylene and evenly distributed throughout the material. To some extent, it may ameliorate the diminishing trend of tensile strength. As a consequence, the composite has a 28.47 % elongation at break and an impact strength of 6.7 kJ/m².

8、ABS plastic

The dispersion of nano calcium carbonate in organic medium has been enhanced following surface modification. It will be utilised in ABS resin to convert the surface from hydrophilic to lipophilic. It can improve the mechanical qualities of ABS resin. Such as impact strength, tensile strength, surface hardness, bending strength, and thermal qualities such as heat deflection temperature.

Summary

Above you can see HUACHEN Screw’s list of the plastics we commonly use that can be filled with calcium powder. Calcium carbonate fillers require consideration of extruder performance, especially the construction and quality of the extruder’s screw and barrel, to help achieve an excellent calcium carbonate filled melt. For more information about filling plastic products, please refer to HUACHEN Screw, or contact us directly for a quote.

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