Ink-jet printing pretreatment agent and silk fabric surface pretreatment method

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

Active Publication Date: 2019-07-19
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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  • Ink-jet printing pretreatment agent and silk fabric surface pretreatment method
  • Ink-jet printing pretreatment agent and silk fabric surface pretreatment method
  • Ink-jet printing pretreatment agent and silk fabric surface pretreatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0054] Dissolve 5g of urea and 1g of sodium bicarbonate quickly in quantitative distilled water under the stirring action of the stirrer RW20, and stir the obtained solution with the stirrer RW20 at a speed of 350r / min, and add 2g of polyacrylamide pretreatment agent while stirring, Seal and stand overnight to obtain a surface pretreatment agent with a concentration of 2%.

[0055] Use the horizontal padding machine P-B0 to pad the prepared surface pretreatment agent onto the pre-cut silk fabric, perform one dipping and one padding pretreatment, and control the rolling ratio to 100. . Dry the fabric padded with the modified working solution 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 2-6 are different from those in Example 1. Refer to Table 4 for details.

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

[0075] Table 4 Effects of different ionicity surface modifiers on the inkjet printing effect of reactive dyes

[0076]

[0077]

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

Embodiment 7～12

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

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Abstract

The invention provides an ink-jet printing pretreatment agent which is prepared from sodium bicarbonate, urea, polyacrylamide and water. The mass ratio of the urea to the sodium bicarbonate to the polyacrylamide is (1-10) to 1 to (0.5-5); the mass concentration of the polyacrylamide in the ink-jet printing pretreatment agent is 0.1-3%. When a silk fabric is treated by using polyacrylamide as a surface treatment agent, the color shade and the vividness are increased, the apparent color depth K/S value of the printed fabric is improved, the width of printed lines is smaller (namely the anti-seepage effect is better), the permeability of dye molecules on the fabric is reduced, the breaking strength is slightly increased, and the color fastness index is almost unchanged. That is, the polyacrylamide as the pretreatment agent can not only improve the utilization rate of the dye molecules, but also effectively improve the image effect of ink-jet printing, the improvement of the technical level of ink-jet printing is facilitated. 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 in particular relates to an ink-jet printing pretreatment agent and a surface pretreatment method of silk fabrics. Background technique [0002] The nucleophilic reaction between silk and reactive dyes mainly includes the terminal amino group on the main chain of silk fibroin and the side chain amino group of basic amino acid residues such as lysine, the phenolic hydroxyl group on the residue of tyrosine, and the alcoholic hydroxyl group on serine. . The phenolic hydroxyl content of tyrosine on silk fibroin is rich (about 0.6mol / kg, 10% by weight), mainly located on the surface and amorphous area 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 reactive dyes on silk. However, due to the structural characteristics of silk, inkjet p...

Claims

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Application Information

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Patent Type & Authority Applications(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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