Research And Development Of Preparation Technology Of Nanometer Calcium Carbonate By High Gravity Reaction Crystallization Method

"High gravity response", which is listed as the 863 national key project. Crystallization method Preparation Nano calcium carbonate Synthetic technology, recently Nanjing Wygd Plastic Technology Co., Ltd. successfully developed. The technology is at the leading level in China.

In the process of spunbonded nonwovens production, adding calcium carbonate is increasingly becoming a way to reduce costs and achieve functionality. However, agglomeration of calcium carbonate has always been the biggest bottleneck in application, and the problem of dispersion and compatibility in conventional processing equipment has become the key. In the process of adding calcium carbonate, the smaller the particle size distribution and the more uniform the dispersion, the greater the potential of nanoparticles will be. Through the sampling, testing, analysis and comparison of the application of nano calcium carbonate materials produced in the market, the Nanjing group has effectively controlled the original particle size of the special masterbatch WF-1 of polypropylene nonwovens with the self-developed surface treatment agent, so that the particle size is about 40nm, and the particle size is more than 80%, which is concentrated in the size range of 33~46nm, and its distribution range is about 25nm. At present, the company has built an annual production base of 60 thousand tons, covering 47% of the high-end market in the domestic nonwovens industry.