Rice is an indispensable staple food on our table. The rice packaging bag has developed from the simplest woven bag at the beginning to today, whether it is the material used in packaging, the process used in the printing process, the technology used in the compounding process, etc. With earth-shaking changes, while satisfying the storage of rice, it is constantly changing to marketing, functionality and environmental protection.
Printing technology
Compared with the original woven bag packaging and printing effect, the gravure printing of plastic flexible packaging has high production efficiency, accurate color registration of printing patterns, exquisite patterns, better shelf effect, and improved product quality. With the passage of time, flexographic printing, which is energy-saving, environmentally friendly and hygienic, has also begun to be applied in the rice vacuum packaging bag industry.
Composite technology
As the society has higher and higher requirements for the hygiene and safety of product packaging, rice vacuum packaging bags are no longer just dry compounding, and environmentally friendly solvent-free compounding has been used more and more. During solvent-free compounding, a 100% solid solvent-free adhesive and special compounding equipment are used to make the film substrates stick to each other. composite method. The method of compounding two substrates together on a solvent-free compounding machine is also called reactive compounding. Since solvent-free compounding uses solvent-free polyurethane adhesives, there are two-component and one-component adhesives, and the solid content is 100%, so solvent-free compounding and dry compounding have the same physical and mechanical properties of the material. , but more food safety and environmental protection advantages than dry compounding
Special craftsmanship
In order to meet consumers' visual requirements for products, the visual aluminization process continues to develop and mature under the requirements of the market. There are two types of visual aluminizing process: half-side aluminizing process and aluminum washing process. Both of these two processes are to obtain local aluminization effect and local visualization window, and the difference is that the process method is different. The process method of half-side aluminizing is to improve the process in the thin-film aluminizing process. The position of the AL layer that needs to be evaporated is hollowed out, and the aluminized layout does not need to be protected by a mold, so that both a transparent part and an aluminum-plated part are formed. The aluminum film is then composited with the desired material to form a composite film. The process of washing the aluminum composite packaging film removes the aluminum in some areas, and then composites with other substrates. Both of these two processes have been used in the existing high-end rice vacuum packaging bags, which have greatly improved the product quality and achieved good shelf effects.
Under the circumstance that the differentiation of the rice market continues to expand, the partial matting process has also been used in the composite flexible packaging of rice vacuum packaging bags.
Post time: Jul-18-2022
