1. Introduction of paper manufacturers china ( https://www.chinahdht.com/ ).

The traditional sublimation transfer printing refers to printing the sublimation transfer ink on the paper by printing, and the printed paper and the fabric are overlapped by heating, pressurizing or decompressing, and the dye on the paper is sublimated and transferred to the fabric in the gas phase. . In addition to fabrics, they can also be transferred to ceramics, metals and other products.

The main feature of the sublimation transfer technology is that the transferred image is rich in color, rich in layers, and the effect is comparable to printing. Unlike printing, the dyes in transfer printing inks are sublimated by heating, penetrate into the surface of the object, and form colorful images after sublimation. Therefore, thermal transfer products are durable and the image will not peel, crack or fade.

With the rapid development of high technology, heat transfer technology and level have been further expanded and improved. In thermal transfer technology, computers are widely used for image processing and design, and then the image is printed on paper by a high-speed, high-quality inkjet printer, eliminating the plate-making process.

2. Background technology:

Digital sublimation transfer paper is a new type of printing technology, which can be printed in an office environment with a clean production method, without organic solvent and waste water discharge, and has significant energy saving and emission reduction effects. At present, digital sublimation printing technology has replaced some gravure printing processes, but is limited by the high cost of consumables. The base paper of general digital printing paper is 60-90g/square meter, while the base paper of traditional gravure paper is only 30-40g/square meter, so the cost of the base paper has almost doubled.

The market needs a production technology for coating digital printing paper on thin paper of 25-40 grams per square meter, thereby closing the gap between material cost and gravure process. The key to this technology is that the coating material needs to be able to withstand high ink jet volumes at low sizing levels, otherwise the ink will not sublimate to the fabric after penetrating into the base paper.

The common china sticky sublimation paper ( https://www.chinahdht.com/product/sublimation-transfer-paper/sticky-tacky-sublimation-paper/ ) coatings on the market all need to reach a coating weight of more than 6g/m2 to withstand a higher amount of ink. However, the coating thickness needs to be increased during coating, and the base paper is easily soaked by a large amount of water, resulting in arching, folding printing, seersucker and other phenomena. Therefore, large sizing weights are not well achieved on low weight base papers. Due to this contradiction, existing low-weight digital printing papers on the market cannot carry high ink well, and their application range is very limited.