Briefly describe the special properties of talc
alc has always played an irreplaceable role in paper production, mainly because of the following properties:
1. Talc oil adsorption - high oil absorption value, improve the printing of paper ink, reduce the resin barrier in the paper making process, and improve the cleanliness of white water. At the same time, it is also a good deinking aid for waste paper, which is beneficial to improve the retention rate of organic additives in the wet end of the paper machine;
2. Talc lubricity - can improve paper adhesion and production operability (cleanness of scraper, dryer, finishing equipment); endow paper with good hand, softness and finishing; reduce the amount of paint lubricant ;
3. Chemical stability of talc powder - suitable for various papermaking sizing systems. Compared with fillers such as calcium carbonate and kaolin, it can save the amount of chemical additives and give paper a good sizing effect. All kinds of pigments, latex and auxiliary additives have good compatibility. Soft and low hardness: low abrasion degree; high crushing ratio, powder processing is relatively easy, can reduce the wear and tear of processing equipment and papermaking and printing equipment, and improve the effect of paper finishing ;
4. Hydrophobicity of talc powder - improve the water resistance of paper and reduce the hygroscopicity of the finished paper. Sheet structure: endow the coated paper with good smoothness, gloss, roughness, hiding and printability, it is an alternative to water selection Kaolin is an ideal mineral for paper coatings.
