Preparation method of printing liquid containing purple sweet potato pigment

Abstract

The invention discloses a preparation method for printing liquid containing a purple sweet potato pigment. The preparation method comprises the following steps: (1) uniformly mixing a surfactant, malic acid, a humectant, aloe gel, a viscosity regulating agent, a sterilizing agent and deionized water to obtain mixed liquid; (2) adding alkyd resin into the mixed liquid obtained in the last step, andstirring and mixing uniformly; (3) adding the purple sweet potato pigment into the mixed liquid in the step (2), and stirring and mixing uniformly; (4) filtering the mixed liquid obtained in the step(3) by using a filter membrane of which the aperture precision is not greater than 0.45 [mu]m, and taking filtrate, wherein the printing liquid comprises the following components in parts by weight:20 to 28 parts of the purple sweet potato pigment, 12 to 25 parts of the alkyd resin, 1 to 5 parts of the surfactant, 0.5 to 0.8 part of the malic acid, 8 to 12 parts of the humectant, 2 to 3 parts ofthe aloe gel, 2 to 10 parts of the viscosity regulating agent, 2 to 5 parts of the sterilizing agent and 60 to 70 parts of the deionized water. The printing liquid prepared by the preparation methodis good in printing fluency and has saturated and bright patterns, colour and lustre; a printed cotton fabric feels soft; both the colour fastness to washing and the colour fastness to rubbing can reach level 4.

Description

technical field [0001] The invention relates to the technical field of textile materials, in particular to a method for preparing printing liquid containing purple sweet potato pigment. Background technique [0002] With the improvement of living standards and the development of science and technology, people have higher requirements for the appearance, color and performance of textiles. Fabric printing refers to the process of forming patterns on fabrics with dyes or paints. Fabric printing belongs to partial dyeing, which is one of the important ways of pattern decoration. The main methods of fabric printing are: direct printing, discharge printing, resist printing, pigment printing, transfer printing and digital inkjet printing. The so-called digital inkjet printing is to use scanners, digital cameras and other input means to input the pattern into the computer in digital form. After image software processing, the digital inkjet printing machine controlled by the comput...

AI Technical Summary

Problems solved by technology

my country is rich in purple sweet potato resources. In the manufacturing process of purple sweet potato products, a large amount of leftovers will be produced. At present, the leftovers from the production of purple sweet potato products have not been fully utilized, which not only wastes resources, but also pollutes the environment.

Purple sweet potato is rich in various natural active ingredients, which can be used as natural pigments, but most of the pigments extracted from purple sweet potatoes are in the stage of experimental research. A lot of exploration and practice are needed to realize industrial production, and the binding fastness of existing purple sweet potato pigments to textiles is poor, and it is difficult for purple sweet potato pigments to be directly dyed into textiles

[0004] Digital inkjet printing accurately prints the printing liquid onto the surface of the fabric in a non-contact manner. During the digital inkjet printing process of cotton fabrics, the existing printing liquid is not easy to combine and penetrate quickly with cotton fabrics. The absorption and utilization rate of cotton fabrics is not good, and the coloring speed is slow. , the coloring fastness is low, so in the prior art, before the digital printing of the fabric, the fabric needs to be treated before sizing to help improve the fixation rate and color fastness of natural dyes, but this will Increasing the process of printing and dyeing in digital printing has always been a major problem for printing and dyeing enterprises. It not only prolongs the process cycle, but also causes slow speed and low efficiency of inkjet printing.

[0005] On the other hand, the current printing liquids on the market still have problems such as insufficient printing fluency, poor long-term stability of printing liquids, etc., and the hand feeling of printing is poor, which needs to be improved.