Sodium hexametaphosphate (SHMP) soft water for textile printing and dyeing
The quality of water not only has a great impact on the quality of the pre-processing and other procedures, but also affects the consumption of dyeing materials and auxiliary agents. In the textile printing and dyeing industry, Sodium Hexametaphosphate is good soft water that makes dyes or soap powder not precipitate or block.
The standard of soft water and hard water in natural water is roughly as follows: Soft water 0 ~ 57ppm slightly hard water 57 ~ 100 ppm hard water 100 ~ 280ppm extremely hard water> 280ppm. Calcium and magnesium salt in hard water are mostly not good for printing and dyeing processing. For example, it is difficult to generate calcium and magnesium soap that generates difficulty in generating soap. We precipitated it on the fabric. Such as the inner wall of the machine, the valve, and the guide roller), which hinders the normal progress of production.
When the amount of iron and manganese salt exceeds the specified limit, rust spots, and catalytic oxide fibers will be generated during the practice. When bleaching with oxide, iron and manganese salt also play the role of catalyzed bleach to make cotton fiber crispy.
Calcium and magnesium salt should be removed from natural water, called soft water softening. There are many ways to soften, and appropriate methods can be adopted as needed.
The water that is generally used for pre-treatment, dyeing, and stamping water will be used to use sodium polytypic phosphate for metal ions in the water. The pH value of Sodium Hexametaphosphate is close to neutral. The phenomenon affects product quality. Sodium hexametaphosphate can generate linked compounds with calcium ions in hard water and "block" calcium to "block" to achieve the purpose of soft water.
Adding to Sodium Hexametaphosphate can also prevent the combination of metal ions such as iron, calcium, and magnesium contained in various processes in each process of washing, printing, and dying. Because the metal ions in the water have a blockade effect, it can effectively prevent the reattachment of silicon spots, plenists, or pollutants, and enhance the color fastness.
The general dosage of Sodium Hexametaphosphate is in hard water with 10 ppm, with SHMP10 grams per 100 liters.
The Sodium Hexametaphosphate produced by Goway is produced in heat phosphate, which is better for textile printing and dyeing.