First of all, we need to know what is ash? When burning at high temperature, hydroxypropyl methylcellulose undergoes a series of physical and chemical changes, and finally the organic components volatilize and escape, while the inorganic components (mainly inorganic salts and oxides) remain, and these residues are called ash. It indicates an indicator of the total amount of inorganic components in hydroxypropyl methylcellulose.

So what is the relationship between the ash content of hydroxypropyl methylcellulose and the quality of cellulose? Generally speaking, the lower the ash content of hydroxypropyl methylcellulose, the higher the purity of cellulose and the better the quality of cellulose. What factors affect the ash content of hydroxypropyl methylcellulose?

1. The quality of refined cotton, the main raw material of cellulose, and the quality of refined cotton are also good or bad. The hydroxypropyl methylcellulose produced from refined cotton with less impurities is whiter in color, less in ash, and better in water retention.

2. The number of washings of raw materials: there will be some dust and impurities in the refined cotton, the more times of washing, the less cellulose impurities produced, relatively speaking, the smaller the ash content of the finished product after burning.

3. Some small materials will be added in the production process of hydroxypropyl methylcellulose, which will also cause a lot of ash after burning.

4. Failure to respond well in the cellulose production process will also affect the ash content of the product

5. In order to show the high purity of their cellulose, some manufacturers will add a combustion enhancer to the product, and there is almost no ash after the cellulose is burned. But at this time, we should pay attention to the color and state of the remaining ash after the cellulose is burned. Although the cellulose with a combustion enhancer can be fully burned, the shape and color of the ash after burning are very different from the shape and color of pure cellulose after burning. of difference.

The length of burning time of hydroxypropyl methylcellulose has a certain relationship with the water retention rate of cellulose. Generally speaking, the longer the burning time of cellulose, the better the water retention rate. On the contrary, the water retention rate of cellulose with shorter burning time may be worse.

Construction Grade Hydroxypropyl Methyl Cellulose