As a widely used packaging carrier, the printed pattern of PE vest bag is not only a window for brand display, but also an important factor to attract consumers. The choice of printing process directly determines the clarity and durability of the pattern. Different printing processes have their own characteristics and scope of application, which profoundly affect the final visual presentation and use cycle of PE vest bag. Understanding the differences between these processes can help enterprises and producers select the most suitable printing method according to actual needs and improve the quality of packaging.
Gravure printing is one of the printing processes commonly used for PE vest bags. It fills the ink in the pits by engraving the gravure cylinder and then transfers it to the surface of the PE film. The advantage of this process is that it can achieve high ink layer thickness printing, high color saturation, rich pattern layering, especially suitable for printing large areas of color blocks and gradient effects, and can present clear and delicate pattern details. In terms of durability, due to the large amount of ink transfer of gravure printing, the ink layer attached to the PE film is thick, so that the pattern is not easy to fade or fall off during daily use, friction and wear, and can maintain the integrity and brightness of the pattern for a long time. However, gravure printing also has the problems of high plate making cost and long plate changing cycle, so it is more suitable for large-scale, fixed-pattern PE vest bag printing needs.
Flexographic printing also occupies a place in the field of PE vest bag printing with its unique advantages. This process uses an elastic rubber plate as a printing plate and uses an anilox roller to transfer ink. Its operation is relatively simple, and the equipment cost and plate making cost are low. It is very suitable for small-batch, multi-variety printing tasks and can achieve fast plate change. In terms of pattern clarity, with the advancement of plate making technology, flexographic printing can now achieve a higher resolution and meet the printing requirements of most conventional patterns. In terms of durability, the reasonable selection of ink and printing parameters can make the pattern have better wear resistance. However, compared with gravure printing, the ink layer of flexographic printing is thinner, and when printing fine lines and text, the clarity is slightly insufficient and the color vividness is also lacking.
Screen printing brings special printing effects to PE vest bags with its unique printing method. It allows the ink to leak onto the surface of the substrate through the mesh of the screen. The ink layer is thick and has strong covering power. It is suitable for printing three-dimensional patterns, such as fluorescent patterns, frosted texture patterns, etc., which can add a unique visual charm to the PE vest bag. However, the resolution of screen printing is limited, and it is difficult to present a clear and sharp effect for fine lines and small text. In terms of durability, due to the thick ink layer and strong adhesion, the screen-printed pattern has good friction resistance, but the printing efficiency of this process is relatively low, and it is not suitable for printing complex gradient patterns. It is often used for personalized and customized small-batch PE vest bag printing.
As an emerging printing technology, digital printing shows strong flexibility in PE vest bag printing. It does not require plate making, and the ink is directly sprayed onto the surface of the PE film through computer control. It can quickly respond to different pattern design requirements and is particularly suitable for small-batch, multi-variety, and personalized printing tasks. Digital printing can achieve high-resolution pattern output, accurately restore fine patterns such as photos and complex illustrations, and excel in clarity. However, the ink drying method and thin ink layer of digital printing make the pattern have certain shortcomings in durability, and it is easy to fade and wear. However, by selecting special inks and performing surface treatment, the durability of the pattern can be effectively improved.
When choosing the printing process of pe vest bag, many factors need to be considered comprehensively. If you pursue high quality, high durability and large printing quantity, gravure printing is the preferred choice; for cost-sensitive, small printing quantity and frequent pattern changes, flexographic printing is more suitable; if you need to achieve special effects and personalized customization, screen printing and digital printing can play a unique role. In addition, the type of ink, the surface treatment condition of the PE film, etc. will also affect the clarity and durability of the pattern, and it needs to be reasonably matched according to actual needs.
With the improvement of environmental protection requirements and the continuous innovation of printing technology, the printing process of pe vest bag is developing in the direction of green, intelligent and efficient. Environmentally friendly inks such as water-based inks and UV inks are being used more and more widely, which can not only reduce environmental pollution but also help improve the durability of patterns. The continuous emergence of new printing equipment and technologies will further improve printing accuracy and efficiency. In the future, it is expected to achieve a comprehensive breakthrough in pattern clarity, durability and environmental performance of PE vest bag printing.
