The relationship between ash content and quality in hydroxypropyl methyl cellulose

The relationship between ash content and quality in hydroxypropyl methyl cellulose

First of all, we must first understand what ash is
1. Ash is also called burning residue, which can be simply understood as impurities in the product. It will naturally occur during the production process. After the product comes out of the etherification reactor, it will enter the neutralization reactor. In the neutralization reactor, the pH value is adjusted to be neutral, and then hot water is added for washing. The more hot water is added , The more washing times, the lower the ash content, and vice versa.
2. The size of ash is also reflected in the purity of cellulose. The higher the purity, the less ash after burning.
Next, let’s analyze the information we get through the process of burning hydroxypropyl methylcellulose.
*1: The lower the ash content, the higher the quality. The determinants of the amount of ash residue:
(1) Quality of cellulose raw materials (refined cotton): Generally, the better the quality of refined cotton, the whiter the color, ash and water retention of the cellulose produced. (All the cotton of our company uses Xinjiang refined cotton, so you can rest assured to buy)
(2) The number of washing: There will be some dust and impurities in the raw materials. The more washing times, the smaller the ash content of the finished product after combustion.
(3) Adding small materials to the finished product will cause a large amount of ash after combustion.
(4) Failure to react well during the production process will also affect the ash content of cellulose.
(5) In order to confuse everyone’s vision, some manufacturers will add a combustion aid to it, and there is almost no ash after burning. In this case, everyone is required to remember the color and state of the pure product after burning, because the cellulose added with the combustion aid can Fully burned, but the color after burning is still very different from the pure product.
Second: the length of burning time:
The burning time of cellulose with good water retention rate is relatively longer, and vice versa for low water retention rate.