Research on Practical Practice of Acid Dyes Printing of Nylon Velvet

Summary

For the printed effects, color uniformity, and color accuracy of nylon velvet fabric, the pre -treatment of nylon velvet cloth printing is pre -treated, combined with the selection of printed dyes, the preparation of color pulp, and the optimization of the process conditions, and the optimization of the process conditions. The printed production process is determined; after the production practice, the printing of the nylon velvet velvet fabric has a clear print pattern and a higher color fastness, reducing the defects of the print pattern and improving the quality of the printed products.

0 preface

Nylon velvet velvet fabric is a velvet cloth made of velvet fabrics. Its appearance is luxurious and noble, with soft feel, nylon velvet velvet cloth is widely used for decorative cloth and textile clothing cloth; The cloth is printed to obtain a rich printing velvet cloth. Due to the characteristics of nylon velvete fabric, direct printing with acidic dyes is used for direct printing. The nylon velvet implanted velvet fabric is higher than ordinary knitted fabric printing. Leak, white lines, white dots and other print flaws, resulting in unclear print patterns, poor brightness and poor dyeing, which ultimately affects the quality of print products.

To this end, through the selection of nylonal velvet fabric dyes and printing agents, and the control of various production processes, the nylon fiber on the surface layer of the nylon velvet fabric has better permeability to the printed color pulp, reducing the printing pattern Points of defects; the printed nylon velvet velvet fabric has a clear print pattern and a higher color fastness, thereby improving the quality of the printed products and reducing the printed defects of nylon fabrics.

1. Test

1.1 Materials and Instruments

Faculty: Nylon velvet implanted fabrics such as 0.9 points × 0.5 mm nylon 66 velvet, 0.9 points × 0.7 mm nylon 66 fluff.

Printing dyes: acid dyes Yellow T-W, Red F-GS, Violet C-B, Navy C-RN; Neutrilan Yellow S-GL, Red S-RL, Brown S-3R, Navy M-BRX (Yorkshine Chemical).

Additive: Passing agent PA-66 (Jingzhan), citric acid, urea, solvent F-BC, anti-dipped soap washing agent Intratex PWO, acidic fixing agent NR (commercially available), 气 osmotic AP Lyoprint AP (Hunsmai).

Instruments: Analysis of balance, CY-50 Magnetic Stick Printing Machine, GZX-9240 MBE number showing a wind and drying box, RJ-430 steaming box, SW-12A II-II washing color target test machine, friction fastness tester tester (Wenzhou Dirong), computer darteter DataColor 650 (DataColor Company in the United States) and so on.

1.2 Test content

1.2.1 acid dye printing process

(1) Process process:

Pre -processing before printing → print → drying (100 ℃) → steam (102 ~ 105 ℃, 20-30min) → clean washing → fixing color → dehydration → drying → finished finishing → finished product.

(2) Printed color slurry process prescription/g

Acid dye X

Solvent F-BC 20 ～ 30

Urea 20 ～ 40

Explorer AP 10 ～ 15

Printed thicker 2.50 ~ 3.50

Citric acid (1: 1) 10 ～ 15

Water Y

Synthetic 1000G

1.2.2 color fastness test

A. Soap-resistant coloring fastness: According to the ISO 105-C03 "Washing Symbol" test.

B. Khan resistant stain color fastness: according to the ISO 105-E04 "Khan resistance color fastness".

C. Sun exposure: According to the ISO 105 B02 "Textile color fastness test, patients with passenger light color fastness: tanna arc lamp test" test.

D. Fiction resistance: According to the GB/T 3920-2008 "Textile Color Fixedness Test Folting Resistance Phase".

E. Color variation: Use a computer color measuring color matchmaker to determine the total color variation of the fabric.

2 Results and discussion

2.1 Pre -printed treatment

In order to improve the surface of nylon velvet planting fabric surface, the fabric hair and whiteness, remove the oil and debris on the fabric velvet flush, which is conducive to the dye printing of the velvet cloth; Oil removal processed.

Craft conditions: 2 to 3g/L of refined penetration, 2g/L removing agent, 1.0 ~ 1.5g/L, and 2 to 3g/L. Treat the temperature of the nylon fluffy velvet at 80 ° C to 85 ° C for 20min; wash it with hot water from 60 ° C to 70 ° C; then clean it with warm water from 40 ° C to 50 ° C and cold water at room temperature; The velvet cloth is dried at the temperature of 110 ° C to 115 ° C.

2.2 Dye for velvet cloth printing:

Nylon fabric (fiber) printing dyes can be selected from weak acidic dyes and neutral dyes. Because the nylon molecule has an amide group and the end of the fiber molecular chain has free amino and carboxyl groups. Under the condition of high temperature steaming conditions, the key is combined with nylon fibers; the weak acid dye is bright, the wet treatment fastness is not good, and the chromatography is wide; Dark print.

Passing acid dye has an important impact on the quality of nylon velvete fabric (such as fresh color, color, color fastness, product ecology, etc.); when choosing printed dyes, pay attention to the dissolving performance, improvement rate, reproducibility of printing dyes And high fixation rate and easy washing, etc.