Energy-saving and environmentally friendly inkjet cold transfer printing process

Energy-saving and environmentally friendly inkjet cold transfer printing process

"COOLTRANS cold transfer printing technology is developed to meet the needs of current innovations and can solve the environmental issues of printing, clean production and high-precision printing." When it comes to the original intention of developing cold transfer printing technology, Shanghai Changsheng Textile Products Co., Ltd. Chen Guiwu, vice chairman of the company, said. Indeed, as a high-pollution link in the textile chain, the effect of how to make printing and dyeing work more efficiently is pursued by enterprises. How to develop printing and dyeing technology that is both efficient and environmentally friendly is a goal that every socially responsible company should pursue.

The low cost, high output, and energy saving and environmental protection are the highest vocabulary words that Chen Guiwu mentioned when referring to the COOLTRANS cold transfer printing process. “It has a catalytic effect on improving the core competitiveness of the textile industry and increasing the added value of products.” Chen Guiwu said with pride. In order to further explain how the cold transfer printing process obtains the core competitiveness of the industry, Chen Guiwu reported to the reporter one by one the technological innovation achievements, market comparative advantages, and the resulting social and economic benefits that Changsheng has achieved over the past 6 years.

Process features lay market value

“The process of cold transfer printing of natural fiber fabrics originating in Europe is based on the principle that the color paste of water-soluble reactive dyes is printed and then converted into printing and printing paper, and the fabric pre-treatment and transfer printing paper are closely matched and applied. With the pressure, the pretreatment liquid on the fabric dissolves the colorant on the transfer printing paper. Under a certain pressure, due to the dye's affinity for the fabric is higher than that of the transfer paper, the dye is transferred to the fabric and enters into the fabric gap In the process, the finished product is formed after the fixing and washing." Chen Guiwu briefly introduced the principle of the cold transfer printing process.

COOLTRANS cold transfer printing process continues to innovate and develop the key processes and equipment for cold transfer printing, forming a solid color from transfer paper production to printing products, and a complete set of process technology breakthroughs from the printing press to the transfer machine, enabling cold transfer The market-scale production of printed products. Talking about the characteristics of the COOLTRANS cold transfer printing process, Chen Guiwu is not “squeaking” and describes in detail the four characteristics of the process.

The first is COOLTRANS cold transfer printing paper. In the cold transfer printing process, the pattern and pattern are first printed on the cold transfer printing paper through a water-soluble reactive dye paste to form a pattern film with a bright color and pattern; Printing paper is transferred to the fabric surface. Therefore, the transfer performance of the transfer printing surface coating plays a key role in the reproducibility of the printing pattern. Changsheng's R&D team has developed an acrylic and styrene copolymer system and a hydrophobic acrylic resin, a hydrophilic acrylic resin compound type, through innovative development from a single barrier coating to a composite coating. The release agent has solved one of the core problems of cold transfer printing, that is, the production of high-quality transfer carriers, laying the foundation for high-efficiency, high transfer rate, and high-quality transfer printing production.

For COOLTRANS cold transfer printing pretreatment and pastes, Changsheng's cold transfer printing process developed a quaternary ammonium compound pretreatment agent to increase the dye adsorption effect of the fabrics to be printed. On the one hand, the transfer speed can be increased. Increasing the adsorption of the dye on the cloth surface can well control the permeability of the print pattern on the cloth surface and the diffusion of the fine lines. Thus, the coloring rate is high and the fixing rate is improved, and the dye residue in the washing wastewater is reduced.

In the printing of COOLTRANS cold transfer printing paper, Changsheng developed the technology of producing all-cotton transfer printing paper by gravure printing machine, and formulated the water-based environmental ink color paste needed for gravure printing cold transfer decorative paper, high-speed printing, and production. High-precision, pattern rich layered transfer printing paper. In addition, the company also produced COOLTRANS cold transfer printing paper through the improvement of flexographic printing machinery, using a reasonable process flow and applying modified dyes. In the fabric pre-processing section, Changsheng developed and designed a cold transfer printing pre-treatment device that can precisely control the amount of pre-treatment liquid on the fabric so that the dye on the transfer paper is fully dissolved and the fiber is fully ionized. This improves the color yield of the fabric surface during transfer and avoids bleedout. In the transfer printing process, the company has developed a roll transfer device and a blanket transfer device for cold transfer printing. By repeatedly experimenting with different models and determining the specific construction conditions of different fabrics and varieties, a long-term balance was found between production efficiency, transfer rate and product quality.

In order to meet the growing market demand for small batches and multi-species products, they have also combined cold transfer printing with inkjet printing to develop COOLTRANS cold transfer digital inkjet printing. It solves the problems of long delivery time, long production cycle of small batch orders, and meets the demand for product specialization. Let this technology be used as a soft and gravure cold transfer printing pre-production factory digital sample preparation process.

Environmental waterborne materials highlight comparative advantages

For the industry, the name of cold transfer printing technology is not unfamiliar, after many companies have used it as the focus of promoting new products. What advantages does Changsheng COOLTRANS cold transfer printing technology have? Has it broken through some bottlenecks in the field?

“Compared with other similar cold transfer printing technologies, our raw materials are all environmentally friendly water-based materials. Non-aqueous solvents are generally used as ink solvents or release agents, but these solvents are for the health of operators and for the environment. Unfavorable, the solvent is not good recovery, the cost is also difficult to drop.The traditional digital ink-jet printing is also often encountered difficult to deal with thick fabrics or fabrics on the cloth can cause nozzle clogging, or it is difficult for jacquard fabric Can spray fine printing effect, in our COOLTRANS cold transfer printing technology, these problems can be solved." Chen Guiwu introduced.

After continuous experimentation, Changsheng's R&D team found that the use of the third generation of blanket transfer presses enabled the rapid production of exquisite transfer printing products. After large-scale production practices, the best overall yield was 99%. Chen Guiwu said that with the COOLTRANS cold transfer printing process, the production speed of its printing has reached more than three times that of previous imported equipment in Europe. The printed products can be compared with digital printing fineness and halftone photographs, and COOLTRANS cold transfer printing is lower in cost and higher in output than digital printing.

Correct perception does not enter

No matter what kind of technology, its market application prospects and the economic benefits it brings must be the company's most concerned. Chen Guiwu is also very confident about this point. “The COOLTRANS cold transfer printing has been put into production for 4 to 5 years, and it has achieved industrial production. The customers are very satisfied with the finished printing effect. Besides the printing processing business of the fabric, due to the customers With the needs of the market, the company started a new business of cold transfer printing equipment and consumables two years ago."

"The market's demand for COOLTRANS cold transfer technology for the concept of low-carbon environmental protection has been further improved. The reason for this is that domestically, the supervision of the environmental protection department is increasing, and foreign brand manufacturers are paying attention to sustainable development." Chen Guiwu further explained.

In terms of market access for related companies, Chen Guiwu sincerely stated that “COOLTRANS cold transfer printing is a revolutionary printing technology, but it is not like some people can replace the traditional printing process. Cold transfer printing is just a lot at present. A new page has been added to the printing technology. It is a new printing technology that is not yet available in textile textbooks. It provides the industry with a photo-quality three-dimensional printing effect, with a new choice and energy-saving and low-carbon environmental protection. The scale of a company is big and small, small and small, and the most important thing is to look at the intensity of investment in the development market. Of course, large companies have advantages in this respect."

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