[Zhongbo.com] Thermal transfer is an emerging printing process with high technical content. It is divided into two parts: transfer film printing and transfer processing. After molding, the ink layer is integrated with the surface of the product, which is realistic and beautiful. It can be applied to the 3D glass cover to greatly improve the grade of the product. Today, let's take a look at 3D glass cover thermal transfer technology! First, thermal transfer concept The commonly used thermal transfer is a technical form in which a pattern and an image on a thermal transfer paper are transferred to a 180 C0--230 C0 transfer on different material media using a thermal transfer device. At the beginning, thermal transfer technology was applied in the textile printing and dyeing industry and the shoe material industry. Later, with the development of the times and the advancement of technology, the application fields are increasing. Especially the emergence of digital technology and the emergence of personalized consumption concepts have made the application of thermal transfer technology more popular and extensive. The application products are endless and cover almost all material fields. . For example, metal, wood, stone, ceramic, glass, PVC, leather, chemical fiber fabrics can be transferred to beautiful patterns and images using thermal transfer technology to produce and produce exquisite products. Second, the thermal transfer printing method There are two kinds, one is sublimation transfer method, and the other is thermosetting transfer method. 1, sublimation transfer After the color paste produced by the heat-raising disperse dye is printed into a printing paper by a screen or a gravure, the pattern on the printing paper is transferred onto a desired medium. 2, thermosetting transfer The thermosetting ink, also known as hot melt glue, is printed on the printing paper by screen printing, and then transferred the pattern on the printing paper to the products such as the cultural shirt and the clothing. The difference between the two methods is: First, the sublimation transfer method is mainly applied to chemical fiber cloth and hard material coated with thermal transfer coating, and the thermosetting transfer method is mainly applied to pure cotton products; Second, the texture produced by the two methods is also different. After the transfer of the sublimation pattern, the original texture of the material is not changed, and the texture and the look are good. After the thermosetting pattern is transferred, a layer of gel is formed on the surface of the attached object, which is inferior in hand and airtight. The two printing methods have their own advantages and disadvantages in production and production, each with its own characteristics. Third, the type of thermal transfer 1, thermal separation Thermal separation is again seen as a "hot strip" transfer. It is a popular transfer. Because when used on a shirt, it has the same soft texture as the direct use of screen printing. The reason why it is called "hot peeling" is because after applying the transfer product for 10 seconds by the hot press, the paper is quickly peeled off and the ink is divided into two. Some of the ink is transferred to the shirt while the other part is left on the paper. This gives the transfer product a soft texture. 2, cold stripping Cold peel transfer is still very popular, it is mainly used for the printing of sportswear, as well as metal foil printing on shirts. In fact, if you can operate correctly, you can choose either thermal separation or cold stripping for transfer printing. There is no difference between the effect of heat separation and cold stripping and the operation. The real difference is the application of the paper and press. When you use cold peeling, cool the transfer paper for about 30 seconds before you strip the paper. This operation causes the ink to remain completely on the garment, and the transferred pattern has a strong elastic texture similar to rubber. Cold-release prints are generally not suitable if larger prints are printed on t-shirts because they are very hot on the body and can affect the breathability of the shirt. They also cannot be washed because cracks can occur in the rubber layer on the ink. Then, the cold peeling came back as a "retro" type of print and was being used again. 3, inkjet transfer Inkjet is commonly used when printing shirts directly and making transfer products. Conversion inkjet is a special type of ink that is automatically ejected under high temperature pressure. Fourth, the characteristics and technical methods of traditional thermal transfer There are three kinds of traditional thermal transfer technology: silk screen thermal transfer, gravure (copper plate, electro-engraving plate) thermal transfer, offset thermal transfer. The traditional sublimation thermal transfer feature is printed. Five, thermal transfer process 1, thermal transfer printing Divided into transfer film printing and transfer processing: (1) The printing of transfer film adopts dot printing (resolution up to 300dpi), and the pattern is pre-printed on the surface of the film. The printed pattern is rich in layers, colorful, ever-changing, small in color difference, good in reproducibility, and can meet the requirements of design designers. Effective and suitable for mass production; (2) Transfer processing The fine pattern on the transfer film is transferred to the surface of the product by one-time processing (heating and pressing) of the heat transfer machine. After the molding, the ink layer is integrated with the surface of the product, which is realistic and beautiful, greatly improving the product. Grade. 2. What are the principles and characteristics of the thermal transfer process? The principle of thermal transfer: pre-print the color pattern on the heat-resistant substrate film (by release treatment), and then transfer it to the surface of the product by hot stamping with special transfer equipment. Reliable technical stability, good material formulation and equipment close cooperation. Thermal transfer process features: simple operation, less production process, high efficiency, no pollution, small footprint, and low investment. After printing, the adhesion is good, the gloss is high, the picture is clear, the color is accurate, the color is bright, safe and non-toxic. After hot stamping, it can be processed by spray blasting, secondary injection molding, bending and punching. to sum up The glass itself is transparent, and the surface of the 3D glass is relatively complicated. Engineers try their best to enrich the surface effect through the processes of filming, printing and spraying. 3D glass curved printing technology is called one of the four major technical difficulties, and it is necessary to develop a new decorative process and develop new equipment. The industry is about to break out, are the friends of all industry chains ready?
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February 21, 2024