Precipitated calcium carbonate is a good paper filler, the filler retention rate improve after modification.

轻质碳酸钙是良好的造纸填料，通过改性可有效提高其留着率。

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Precipitated calcium carbonate is a good paper filler, the filler retention rate improve after modification.

轻质碳酸钙是良好的造纸填料，通过改性可有效提高其留着率。

youdao