What is the role of calcium carbonate in modification?
What is the role of calcium carbonate in modification?
In recent years, with the rapid development of calcium carbonate processing technology and the rapid development of calcium carbonate surface treatment technology, it can improve many properties of products while reducing the cost of products, and some properties are unique.
What is the role of calcium carbonate in modification?
The environmental protection effect of calcium carbonate
(1) Save oil resources
Calculated based on the content of calcium carbonate filled in PE 30%, the annual output of plastic packaging bags is 3 million tons, which can save 900,000 tons of petroleum-based resin and 2.7 million tons of oil.
(2) Giving environmental protection performance
Adding calcium carbonate to the incinerated plastic garbage bags can increase the burning speed and greatly shorten the burning time. The specific reason is that the calcium carbonate in the plastic film expands when it is burned and generates numerous tiny pores, which increases the combustible area in contact with oxygen and promotes the burning speed. For example, for polyethylene plastic film containing 30% calcium carbonate, the burning time is reduced from 12 seconds for pure plastic film to 4 seconds.
The plastic film filled with calcium carbonate, due to the wicking effect of calcium carbonate, can promote more thorough burning and reduce the release of black smoke. It can also use the alkalinity of calcium carbonate in the film to absorb a large amount of dispersed acid gas, reduce the release of toxic smoke, and greatly reduce the probability of acid rain.
What is the role of calcium carbonate in modification?
Reduce the gloss of composite materials
The effect on the surface gloss of composite products is related to the processing method and variety of calcium carbonate. The order of the gloss of specific composite materials is wet process>dry process (light calcium carbonate>large calcite calcium carbonate>marble calcium carbonate> Small calcite calcium carbonate > dolomite calcium carbonate).
What is the role of calcium carbonate in modification?
Reduce the transparency of composite materials
The refractive index of calcium carbonate is very different from that of commonly used resins such as polyethylene and polypropylene, so the filling of calcium carbonate of regular size will affect the transparency of the film. Affect the transparency of composite products.
