The importance of low iron magnesium oxide in adhesives

The importance of low iron magnesium oxide in adhesives

If it's not for the people who produce adhesives, they may be unfamiliar with the term adhesives. But you know about the glue used in life, such as "502" and "101". But have you noticed? That's the color of the glue we buy. Sometimes it looks red. Although the glue is still the same, these red colors will make us feel very good after all Uncomfortable, especially when we paste something that pays more attention to the surface, then this red will seriously affect the image.

The adhesive industry has high requirements for the index of magnesium oxide, requiring large specific volume, large volume, good dispersion, high activity (generally, dolomite activity is required to be 80-120, brine activity is required to be 120-150), non precipitation, fineness of 325 mesh (equivalent product quality, fineness is relatively good, specific volume is relatively good, specific volume is too large or content is too low It may cause suspension and ball phenomenon), low iron content. If the iron content of magnesium oxide is too high, it is easy to make the glue red and discolored. Generally, the iron content cannot be higher than 0.05%, without discoloration.