roll sublimation paper thermal transfer printing is a printing process that has emerged in China for less than 20 years. It was introduced to my country from abroad in the 1990s. Through the continuous efforts of exploration and research by industry peers, it has developed into a mature and rapidly updated printing process. Because this process has greater advantages in controlling production costs and improving product appearance, it is highly respected and continues to develop in the printing industry.
- Introduction of Thermal Transfer Technology
Thermal transfer technology is divided into two parts: thermal transfer film printing and thermal transfer processing.
- Thermal transfer film printing:
Most of them use precise gravure printing technology, and the resolution of printing dots can reach 300 dpi. The pattern is printed on the surface of the transfer film in advance, and the printed thermal transfer film has rich patterns, bright and full colors, small color difference, and better pattern effect reproducibility, which can meet the requirements of pattern designers.
- Thermal transfer technology processing:
Through the primary processing of the thermal transfer machine (according to the working principle of the thermal transfer machine, the thermal transfer film is heated and pressurized simultaneously), the exquisite pattern on the transfer film is transferred to the surface of the substrate (including flat and curved surfaces) After forming, the pattern is integrated with the product surface, and the transfer film will fall off naturally, and the process is completed.
Because the traditional thermal transfer printing process is green and environmentally friendly, conforms to international standards, the printing pattern is vivid, the color is bright and saturated, the product is exquisite and beautiful after molding, the pattern is strong, durable, not easy to fade, low production loss, low cost, etc Because of its advantages, it is widely used in the surface decoration and packaging decoration of cosmetics, toys, electrical appliances, household building materials, stationery, gifts, accessories, daily necessities and other products with large quantities and high requirements. Applicable materials include ABS, AS, PS, PVC, PP, PE and other plastic products and metal, glass, and wood products.
- Advantages of traditional thermal transfer technology
The rise of emerging transfer processes such as in-mold labeling, in-mold transfer, vacuum transfer, thermal sublimation, water transfer, etc., has a greater impact on traditional thermal transfer technology, but the traditional thermal transfer process is still used It is a prosperous scene, with numerous applications in cosmetics, toys, electrical appliances, household building materials, stationery, gifts, accessories, daily necessities, etc., especially on cylindrical, conical, curved and other shapes, such as lipstick shells. In product areas such as, pen cores, finger snowboards, and cone lampshades, traditional heat transfer printing has shown its irreplaceable side. Even if it is a flat object, there are many processes that can be printed, but traditional thermal transfer can still show advantages in many aspects.
The first point is high efficiency
Take the Rubik's Cube as an example. There are six planes in the Rubik's Cube. If other types of printing technology are used, there must be a process of waiting for drying or natural drying. In this process, some place is bound to store these process products. But thermal transfer printing is different. It can be printed continuously without drying, and packaging can be done after printing is completed. The production site is greatly reduced and the production efficiency is greatly improved.
The second point is rich colors
Take the Rubik's Cube as an example. The traditional Rubik's Cube pattern has only a single color block on each plane, and the colors and patterns are relatively monotonous. The traditional heat transfer is different. Because the pattern is printed on the PET heat transfer base film first, the color of the pattern can be reproduced almost unlimitedly. Various patterns of flowers, trees, landscapes, etc. can be transferred to the cube Above, the appearance of Rubik's cube and the added value of the product are greatly enhanced.
The third point is environmental protection
The traditional thermal transfer film, whether it is the base film or the selected printing ink, release layer, back glue and other materials, can pass the environmental protection testing of domestic and foreign testing institutions (BV, SGS, etc.). In the production process, the noise pollution of thermal transfer is also extremely low, and pollution in sewage and exhaust gas is almost zero. This is one of the reasons why traditional thermal transfer technology is so popular and different from other printing types. .
The fourth point is rich combination
The fourth and important point is that the tacky sublimation paper process combination is relatively rich. In addition to the simpler ordinary thermal transfer process, the product process combination can also be refined to form a high-cut edge, UV-friendly, retort-resistant, Warp resistance, ethanol resistance, high hardness, high wear resistance, matte, partial aluminum plating, partial laser, transparent laser, metal texture and other thermal transfer process combinations. It is suitable for surface decoration of plastic, wood, leather and metal workpieces.