The viscosity of amphoteric polyacrylamide is an important measure of its quality, since viscosity is the most intuitive embodiment of molecular weight and is easy to detect. The greater the molecular weight at the same concentration, the greater the viscosity. The viscosity of the solid content of 12.5% ​​of the dry strength agent produced by our institute is 1500 ~ 6000mPa. s(25c[=). The viscosity is too large, and its poor water solubility is unfavorable for use; if the viscosity is too small, the reinforcing effect is not good. The factors affecting the reaction mainly include the pH of the reaction, the concentration of the initiator, the monomer concentration, the reaction temperature, and the amount of the promoter MPA.
Knitted fabrics are fabrics formed by bending yarns into loops and interlacing by knitting needles, which are divided into warp knitted fabrics and weft knitted fabrics. Knitted fabrics have the characteristics of soft texture, moisture absorption, air permeability, sweating and warmth retention, and most of them have excellent elasticity and extensibility. Compared with shuttle fabrics, it has the characteristics of high output and suitable for small batch production. Knitted clothes are comfortable to wear, close to the body, free of restraint, and can fully reflect the human body curve.
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