1. Its role in PVC cables
As a filler, calcium carbonate powder can reduce the formula cost in PVC cable pellets and play an incremental role in PVC compound materials. Strong effect.
Secondly, calcium carbonate has the function of adsorbing ions. It can reduce the free dissociation of conductive ions in the PVC system, which can not only improve the insulation performance of the product's volume resistivity, but also improve the thermal oxygen aging resistance of the cable material, as well as improve its thermal deformation and mechanical and mechanical properties.
The role of calcium carbonate in PVC cables
In addition, it can also effectively improve PVC cable pellets, extrusion process performance and wire release performance. The amount of calcium carbonate is closely related to low temperature impact embrittlement, elongation, mass loss and other properties.
The role of calcium carbonate in cables is very important. It can not only improve the performance of the product, but also make the cables safer and more reliable to use.
2. Its role in the production of polyvinyl chloride film
The price of polyvinyl chloride particles used in the production of polyvinyl chloride film is relatively high. Currently, no filling is added during blown film production. materials and high production costs. For example, if "activated" 6000 mesh wet heavy calcium carbonate powder is used as the main body to make a film-grade calcium carbonate filling masterbatch specially used for the production of polyvinyl chloride films, its price is only about half of that of polyvinyl chloride particles; If it affects the performance of the film, adding it as a filler can effectively reduce the production cost of PVC film.
The "activated" 6000 mesh wet heavy calcium carbonate powder needs to be extruded and granulated to make calcium carbonate filled masterbatch. Polyvinyl chloride or polypropylene with a higher melt index must be added. and dispersant for lubrication, mixed by a 200L high mixer to form a compound, and then extruded and granulated by a φ65 co-rotating parallel twin-screw extruder.
Experiments have shown that calcium carbonate filled masterbatch has no effect on the transparency and performance of the film produced when the addition amount is less than 10% during the PVC film blowing process. When the addition amount is 10%-15%, the film Transparency gradually decreases without any impact on film properties.