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A kind of ink-jet printing pretreatment agent and the surface pretreatment method of silk fabric

A technology of surface pretreatment and pretreatment agent, applied in the field of textile printing and dyeing, can solve the problems of poor effect and high permeability of dye molecules.

Active Publication Date: 2021-09-24
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, whether sodium alginate or sodium carboxymethyl cellulose is used for inkjet printing pretreatment of silk, there is a disadvantage of greater permeability of dye molecules on the fabric, and the effect is not good when printing and dyeing fine patterns.

Method used

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  • A kind of ink-jet printing pretreatment agent and the surface pretreatment method of silk fabric
  • A kind of ink-jet printing pretreatment agent and the surface pretreatment method of silk fabric
  • A kind of ink-jet printing pretreatment agent and the surface pretreatment method of silk fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In this example, anionic polyacrylamide with a molecular weight of 12 million and high ionicity is used.

[0054] 5g of urea and 1g of sodium bicarbonate were rapidly dissolved in quantitative distilled water under the stirring action of agitator RW20, the obtained solution was stirred by agitator RW20 with a rotating speed of 350r / min, and 2g of polyacrylamide pretreatment agent was added while stirring, Seal and stand overnight to obtain a surface pretreatment agent with a concentration of 2%.

[0055] Using the horizontal rolling mill P-B0, pad the prepared surface pretreatment agent on the silk fabric that has been cut in advance, carry out one padding and one rolling pretreatment, and control the rolling ratio to be controlled at 100. . The fabric of the padding modified working solution was placed and dried in an oven at 75° C. to obtain a pretreated silk fabric.

Embodiment 2～6

[0073] The silk fabric was pretreated according to the method in Example 1. The difference is that the molecular weight and ionicity of the polyacrylamide in Examples 2 to 6 are different from those in Example 1. Please refer to Table 4 for details.

[0074] The pretreated silk fabrics in Examples 1 to 6 and Comparative Example 1 were subjected to the same batch of inkjet printing, and the inkjet printing performance was measured. The results are shown in Table 4.

[0075] Table 4 Influence of surface modifiers with different ionic degrees on the effect of reactive dye inkjet printing

[0076]

[0077]

[0078] Note: 800 represents 8 million molecular weight, and 1200 represents 12 million molecular weight. Low, medium and high respectively represent the ionicity of anionic polyacrylamide macromolecules.

Embodiment 7～12

[0080] The silk fabric was pretreated according to the method in Example 1. The difference is that the mass concentration of polyacrylamide in Examples 7-12 is different from that in Example 1. Please refer to Table 5 for details.

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Abstract

The invention provides an inkjet printing pretreatment agent, which is obtained by preparing sodium bicarbonate, urea, polyacrylamide and water; the mass ratio of the urea, sodium bicarbonate and polyacrylamide is (1-10):1 : (0.5~5); the mass concentration of polyacrylamide in the inkjet printing pretreatment agent is 0.1~3%. Using polyacrylamide as a surface treatment agent to treat silk fabrics increases the color shade and vividness, improves the apparent color depth K / S value of printed fabrics, and the width of printing lines is smaller (that is, the anti-seepage effect is better). The permeability of the molecules on the fabric decreases, the breaking strength increases slightly, and the color fastness index hardly changes. That is to say, polyacrylamide as a pretreatment agent can not only improve the utilization rate of dye molecules, but also effectively improve the image effect of inkjet printing, which is conducive to the improvement of inkjet printing technology. The invention also provides a surface pretreatment method of the silk fabric.

Description

technical field [0001] The invention belongs to the technical field of textile printing and dyeing, and particularly relates to an inkjet printing pretreatment agent and a surface pretreatment method for silk fabrics. Background technique [0002] The main nucleophilic reactions between silk and reactive dyes are the terminal amino groups on the main chain of silk fibroin macromolecules, the side chain amino groups of basic amino acid residues such as lysine, the phenolic hydroxyl groups on tyrosine residues, and the alcoholic hydroxyl groups on serine. . The phenolic hydroxyl content of tyrosine on silk fibroin is abundant (about 0.6 mol / kg, 10% by weight), mainly located on the surface and amorphous region of silk fibroin, where dye molecules are more easily adsorbed, diffused and fixed. Unlike wool and cellulose fibers, phenolic hydroxyl groups play an important role in the dyeing process of silk on reactive dyes. However, due to the structural characteristics of silk, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P5/00D06P5/30D06P3/02D06P1/38
CPCD06P1/38D06P3/028D06P5/002D06P5/30
Inventor 房宽峻曲鸽刘秀明安芳芳马吉康杨海贞
Owner TIANJIN POLYTECHNIC UNIV
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