Digital Sublimation Printing on Knitted Polyamide 6.6 Fabric Treated with Non-Thermal Plasma

Abstract

The garment industry demands stamping processes that are increasingly more agile and less damaging to the environment. In this scenario, digital printing, with the sublimation transfer printing technique, presents itself as a viable option for synthetic textile substrates. Among the synthetic fibres, polyamide (P.A.) fibres stand out, as they are light, soft, durable, and boast moderate sweat absorption; however, before sublimation, superficial treatment is necessary in order to present good results such as withstanding washing and maintaining colour intensity. This study addresses the surface modification of the PA6.6 textile substrate by activating non-thermal plasma at atmospheric pressure to receive dye through the sublimation method with dispersed dye. The knitted PA6.6 fabric surface treatment was performed with plasma application at atmospheric pressure using air in the Plasmatreater AS400 equipment. The sublimation transfer effects were evaluated by wash fastness and colourimetric tests. To assess the wettability effect of the control and treated samples, a contact angle test was carried out on PA6.6 samples. Fourier transform infrared spectroscopy (FTIR) proved the changes in chemical functional groups in the fibres. The results showed a decrease in the contact angle of the textile surface, 4–5 grayscale results for colour change and transfer for washing, and an increase in colour strength. In the FTIR tests, there is an increase in the transmittance value of aromatic, carboxylic groups (C=O, 580 cm−1), amides (N=H, 1630 cm−1), and methyl groups (CH 1369 to 1463 cm−1) as well as the presence of new functional groups in the 3064 cm−1 and 2860 cm−1 bands. These conditions allowed sublimation in the knitted PA6.6 fabric and showed increased colour strength and good wash fastness.

Real-Time Image Defect Detection System of Cloth Digital Printing Machine

“…e matched feature point pair is obtained by the SURF algorithm, and the least square method is selected to fit the matching points to obtain the above parameters. After determining the parameters, we transform according to (5) and finally make the size, position, and angle of the template image and defect image completely consistent.…”

“…Min and Kim proposed a fabric defect detection method based on the Improved Gaussian mixture model, which has a high detection accuracy but does not classify the defect results [ 4 ]; Silva et al proposed a fabric surface defect classification method based on convolutional neural network. This method can classify fabric defects, but its application is limited by application conditions [ 5 ]; TZ et al combined Fourier analysis and wavelet shrinkage and proposed an unsupervised method for detecting fabric defects with periodic patterns. This method simplifies the detection process of periodic fabric defects, but the detection performance is poor [ 6 ]; Sachan et al proposed a detection method to extract the features of the original local binary pattern (LBP) with different resolutions by constructing the Gaussian pyramid model of the printing image.…”

Effect on thermal, mechanical, and biodegradable properties of plasma‐treated fish scale powder/linear low‐density polyethylene polymer composite films

“…The characteristics of the absorbance band at 2914, 2848, 1462, and 715 cm À1 were used to identify polyethylene's presence in all the films. 23,24 The peaks at 2916, 2848, and 1463 cm À1 were attributed to C H stretching, and the peak at 715 cm À1 was attributed to the benzene derivative compound class. The characteristic peaks found in the CFSP at 1639 and 1242 cm À1 were observed in biocomposite films, which shifted slightly to 1644 and 1237 cm À1 , respectively in 1 wt.% CFSPO 2 and 1 wt.% CFSPSF 6 .…”

Exploration on Ability of Printable modified papers for the application in heat sublimation transfer printing of polyester fabric

“…A sublimation heat transfer printing is considered one of the most important, cleanest, and newest styles of printing 2 . This simple printing method has a number of desirable features, such as reduced need for energy and water, no need for post treatment, cheap printing technique, lower maintenance and equipment investment, and an e uent-free method in addition to producing a clear and environmentally clean image 3,4 . In spite of the many advantages of heat transfer printing, the most important drawback is the cost of the paper that limits its use, though it can be used once or sometimes twice in rare cases.…”