Processing technique for natural biological calcium carbonate powder filler

Abstract

The invention discloses a processing technology for natural biological calcium carbonate miropowder filling material. The processing technology comprises the steps that pretreatments of water washing, drying and coarse grinding are performed to the natural biological material, then the pretreated material is crushed and graded, to obtain natural biological calcium carbonate filling material which is smaller than 38 micrometers, the crushed and graded natural biological calcium carbonate filling material is baked for 0.01 to 24 hours at 100 to 900 DEG C in a high-temperature furnace, and the natural biological calcium carbonate miropowder filling material is obtained through air oxidation. The invention has the characteristics that the processing technology can maintain an aragonite crystal form in natural shells to the largest extent, and can main the heterogeneity and the strong polarity of the microcrystalline surface of the natural shells to the largest extent, so that the shell miropowder has a superior micropore structure; the filling material can obviously improve the mechanical property and the hot property of high molecular material, and simultaneously the pollution problem caused by shells and egg shells to the environment is also solved.

Description

technical field

[0001] The invention relates to a processing technology of natural biological calcium carbonate micropowder filler. Background technique

[0002] Calcium carbonate is easy to obtain, low in price, low in toxicity, less in pollution, high in whiteness, and large in filling capacity. It is an inorganic filler widely used in organic polymer-based materials at present. According to the size of the grain, it can be divided into ordinary calcium carbonate and nano calcium carbonate. Ordinary calcium carbonate is widely used in plastics as an extender pigment and filler. It has the advantages of improving material rigidity, heat resistance, dimensional stability, and hiding properties. At the same time, it also has a fatal disadvantage: the impact strength of the material is reduced and the processing performance is deteriorated. Therefore, the traditional CaCO 3 Filled plastics can only be used as incremental reinforcements. However, as a structural material, p...