rainbow

Rainbow film, also known as rainbow film, dazzling film, iridescent film, laser rainbow film, etc. It is completely different from the colored plastic film that we commonly use for printing and dyeing. It is a plastic composite film that melts and extrudes two or more resins with different refractive indices, and sequentially stacks them at intervals of more than 100 layers, each with a thickness of only a few hundred nanometers.
Introduction to Rainbow Film
Rainbow film is a stretchable material that was introduced to Taiwan in the late 1980s and began to be promoted to mainland China. Since 2005, China has started to independently produce rainbow film products.
Rainbow film is divided into original imported rainbow film and domestic rainbow film.
The imported rainbow film is produced by a biaxial stretching machine, which makes the product more uniform and has higher strength. However, the current price of imported products is about 150 yuan per kilogram. The price of ordinary rainbow film in China is around 35 yuan/KG, with a huge difference between the two. The domestically produced 36u biaxial stretch rainbow film product developed by Shantou Guansheng Plastic Co., Ltd. has performance very close to imported products, but the price is less than half of imported products.
The thickness of the rainbow film ranges from 16u to 36u, and the main color series include red background green light, blue background golden light, and blue background purple light. Rainbow film is a multi-layer thin film that fully utilizes the principle of light interference. Under the illumination of light, the refraction and interference between different layers replace the multi angle layered color changes between layers, creating a rainbow like effect in the sky. The magical effect of rainbow film lies in the fact that the rich light effects of the rainbow film substrate at different distances and angles will present completely different iridescent effects.
Application of Rainbow Film
Rainbow film, also known as rainbow film, dazzling film, iridescent film, laser rainbow film, etc. Rainbow film can be used as a single layer packaging or combined with various materials for application:
① In the gold onion powder and gold silver wire industry, after using rainbow film to composite PET film, coating printing can be carried out to create a new colorful illusion effect, which can be processed into gold silver wire or gold onion powder. The product is mainly used in the Christmas gift industry, clothing printing industry, ribbons, etc;
② Paper products industry: Rainbow film composite copperplate paper or white cardboard can be used separately for gift box packaging, or the composite formed rainbow film can be further processed and applied to anti-counterfeiting packaging, cosmetics or gift packaging;
③ Food packaging industry: Rainbow film is mainly used for the twisting packaging of water fructose and the decorative packaging of craft candy. By utilizing the iridescent effect and transparent characteristics of rainbow film, the packaged candy can be transformed into one with the rainbow film itself, providing excellent visual effects;
④ Plastic industry: Rainbow film can be composite with various hard boards for furniture decoration, wall corner or glass curtain wall decoration, enriching the color of buildings and homes;
⑤ Fabric industry: Rainbow film is combined with non-woven fabric to create beautiful environmentally friendly shopping bags, or combined with curtain fabric to create brightly colored curtains and decorations with iridescent effects.
In addition, single-layer rainbow film can also be used as flower packaging and applied to the outer packaging of craft gifts. Rainbow film can also be crushed into snowflake shapes and applied to Christmas craft trees and Christmas gifts.
precautions
Rainbow film is a stretched product with a brittle material, so adjustments to the main process and machine performance are required during use, and the starting tension should be lowered. The production and processing process of rainbow film should pay attention to the following issues:
① Rainbow film is prone to stretching, and is generally used as a base film rather than an outer film during printing and lamination processes.
② Rainbow film has low temperature resistance. When processing hot pressing or high-temperature coating, the temperature should not exceed 80 ° C, otherwise wrinkling, shrinkage or fracture will occur.
③ Rainbow film should not come into contact with strong alkali resistant products or cause the products to fade or even shrink into clumps.
Rainbow film has been promoted and applied in China for 20 years, and the main development trend in the future will step onto a new and higher level, exploring new application areas with higher intensity and more color changes.