Yuanlei Small Classroom | Differential Use of Talcum Powder and Calcium Carbonate in Modified Plastics

Release time:

2024-01-29 09:36


Yuanlei Small Classroom | Differential Use of Talcum Powder and Calcium Carbonate in Modified Plastics


Generally, most of the plastic filling masterbatch is added calcium carbonate, but it must be calcite crystalline ore, because the ore is different, although it is calcium carbonate, some can be beaten out and some cannot be beaten out. Talcum powder and calcium carbonate can be used to fill,From the cost of calcium carbonate is lower than talcum powder, from the production process, calcium carbonate is better than talcum powder processing.




The role of talc and calcium carbonate for filling

(1) Increased dimensional stability (I. e., reduced shrinkage)

(2) increase the stiffness of the material

(3) Increase the heat resistance of the material

(4) Reduce material costs and other aspects.


Defects for filling:


(1) increase in density,
(2) poor use, impact toughness decreased,
(3) material gloss decreased.

Talcum powder and calcium carbonate have the same particle size distinction, generally 300 mesh, 600 mesh, 800 mesh, 1250 mesh and 2500 mesh, of course, there are finer ones, and generally used in plastics can be selected 800 mesh and 1250 mesh, which can make the performance/price ratio the highest.



The difference between the use of talc and calcium carbonate

(1) The shape of talc powder is flake, so it has higher rigidity, dimensional stability and heat resistance temperature, and good reinforcement effect.


(2) Calcium carbonate is generally granular, so its rigidity and other aspects are not as good as talcum powder, but its price is cheaper, and the whiteness is high, and it has little effect on the impact toughness of the plastic.


(3) Talcum powder has a nucleation effect on polypropylene, while calcium carbonate has no obvious effect in this regard.


(4) calcium carbonate can generally be divided into light calcium carbonate and heavy calcium carbonate, and talcum powder does not have this distinction, talcum powder is ground from natural minerals.



Performance Comparison of Composite Reinforced PP






Material, are, increase, plastic, use, modified, calcium carbonate, talcum powder, general, filling

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