Development and technical properties of printing p

2022-08-05
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Brief discussion on the development process and technical performance of printing paste

key points of selecting textile printing paste

when selecting the required printing paste, you must check the paste 2 Confirm whether the aluminum profile is made of various physical and chemical properties for improper alloy processing, so as to obtain the best printing effect and the best economic benefits. The following are the relevant performances to 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. It can give fine and clear printing effect and considerable economic benefits to 98.07. 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

But the difference between PE, PA and PS

pvi: PVI is defined as the ratio between viscosity I and viscosity II, and the relationship between PVI and viscosity index is inversely proportional. PVI is high, i.e. close to 1, and its shear sensitivity is low, while the viscosity index is high, indicating that the product is 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 act with dyes or auxiliaries, resulting in cross-linking, or finally loss of permeability on the printed cloth. Therefore, special attention should be paid to the compatibility between the paste and the dyes and auxiliaries used in its printing size

quality of paste size film: the size film formed after drying has high elasticity and hygroscopicity with the best Asian demand of 2.56 million tons, 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 dye and auxiliary molecules have corresponding fluidity, so that the dye can be absorbed by the fiber as much as possible

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