On the development process and technical performan

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Talking about the development process and technical performance of printing paste

key points of selecting textile printing paste

when selecting and using the required printing paste, we must check various physical and chemical properties of the paste, so as to obtain the best printing effect and the best economic benefits. The following are the relevant performances that should be tested

viscosity: pastes have different viscosities. If the fabric to be printed is hydrophilic and has good water absorption, low viscosity paste should be used, which can give fine and clear printing effect and considerable economic benefits. If the fabric is hydrophobic or high twist fabric, paste with high solid content or low viscosity is the most appropriate

viscosity index: viscosity index is used to determine the shear sensitivity of printing paste. The shear sensitivity of each natural polymer shows natural pseudoplasticity

pvi: PVI is defined as the ratio between viscosity I and viscosity II, and there is an inverse relationship between PVI and viscosity index. PVI is high, that is, close to 1. With the strong support of all parties concerned, its shear sensitivity is low, while the viscosity index is high, indicating that this product is more sensitive to shear force

ionic properties: the modified paste has different ionic properties, such as anionic or non-ionic. People should choose suitable pastes with the same ionic properties according to the ionic properties of the dyes or additives used. Otherwise, the paste will interact with dyes or additives, resulting in cross-linking, or finally loss of permeability on the printed cloth. Therefore, it is necessary to output 3-way 16 bit imitation quantity. Do not pay attention to the compatibility between the paste and the dyes and additives used in its printing paste

quality of paste size film: the size film formed after drying has high elasticity and the best hygroscopicity, so that the size film will not peel off or crack during high-temperature steaming or hot solution fixation. It can absorb enough water to make the corresponding fluidity between the dye and the auxiliary molecules, so as to greatly improve the control accuracy and quality of the dye and be absorbed by the fiber as much as possible

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