Digital printing binding agent, preparation method and applications of digital printing binding agent

Abstract

The invention discloses a digital printing binding agent, a preparation method and applications of the digital printing binding agent. The digital printing binding agent is characterized by comprising the following components by weight percent: 40%-50% of low-temperature self-crosslinking resin, 5%-10% of surface active agent, 5%-15% of dispersing agent, 10%-20% of polyhydric alcohols and the balance of deionized water. The digital printing binding agent disclosed by the invention does not contain APEO (Alkylphenol Ethoxylates), formaldehyde, degradation-resistant compound and the like, and is environment-friendly and pollution-free; according to the digital printing binding agent, the stability and the dispersion are good, pigment particles can be prevented from coagulation, and the digital printing binding agent is baked to be subjected to film formation and crosslinking under low temperature, so that the energy consumption and sewage discharging amount are lowered greatly; and the digital printing agent can be applied to the digital printing of polylactic acid fiber fabric, so that the good printing color fastness and the soft handfeeling can be obtained.

Description

Technical field: [0001] The invention relates to a digital printing adhesive, more specifically, a digital printing adhesive, a preparation method and its application, and belongs to the technical field of textile chemistry. Background technique: [0002] In the paint digital inkjet printing process, the development of paint ink is very important, and the key technology is the research and development of paint ink binder (the nature of the general binder determines the temperature of fabric baking). The quality of the adhesive directly affects the feel, color and color fastness of the fabric. The residual quality of adhesives used for pigment digital printing in the market is uneven, and there are common problems such as poor water resistance of film formation, poor hand feeling, cold and brittle hot stickiness, etc. At the same time, these adhesives need to be baked at high temperature. is unfavorable. Polylactic acid fiber is obtained from grains, and its products can be...

AI Technical Summary

Problems solved by technology

However, this kind of low-temperature adhesive has poor stability, and the storage time is not long. The moisture of this adhesive evaporates quickly, and it is easy to cross-link to form a film at room temperature, resulting in an increase in the viscosity of the entire system, which leads to printing. Blocking phenomenon, people sometimes add some humectant to the printing paste system, but new problems follow, because if the humectant will affect the wet rubbing fastness of the fabric

[0005] The second type is some adhesives with external catalysts, that is, A+B two-component, where A is the catalyst and B is the adhesive. Through the catalysis of A, B can complete cross-linking and curing at low temperature. The disadvantage is that The configuration is troublesome, and the stability of the preparation is not good, and the residual pulp cannot be reused

[0006] The third type of low-temperature adhesives mainly uses radiation-induced crosslinking technology to synthesize low-temperature adhesives, but the cost is relatively high, and it is difficult to popularize.

Although the above-mentioned low-temperature adhesives meet the requirements of polylactic acid fabrics in terms of baking temperature, they are far from meeting the requirements of digital printing systems, such as compatibility with paint inks, maintaining the wettability and smoothness of digital printing machine nozzles. properties, self-dispersion, particle size distribution, etc.

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