Plastic packaging bag printing technology is a vital part of the plastic packaging industry. With the continuous advancement of technology, the types and application scenarios of printing technology are becoming more and more extensive. Different printing technologies are suitable for different materials, uses and needs, and can be mainly divided into the following types:
1. Flexographic Printing
Flexographic printing is one of the most commonly used technologies in plastic packaging bag printing, especially for mass production. Its basic principle is to apply ink to the substrate through a flexible printing plate. The printed pattern is clear and the color is bright, and it is suitable for a variety of packaging materials, including plastic film, paper, etc.
Features:
Suitable for soft packaging materials such as plastic film, paper bags, aluminum foil bags, etc.
Water-based inks and solvent inks can be used, and the environmental protection performance is good.
Suitable for mass production, high efficiency, and stable printing quality.
The printed pattern is fine and suitable for multi-color printing.
Application:
Mainly used in food packaging bags, beverage packaging bags, shopping bags, daily chemical packaging, etc.
2. Gravure Printing
Gravure printing is a technology that transfers ink to the printing material through the grooves of the printing plate. Gravure printing is suitable for high-quality, large-volume printing, especially for maintaining stable printing quality and high color reproduction for a long time.
Features:
High printing quality, bright colors, rich layers, suitable for complex patterns and details.
High printing precision, suitable for mass production.
The ink is transferred through the grooves of gravure printing, and the ink consumption is large, so the cost is high.
Suitable for printing on smooth and flat plastic films.
Application:
High-end food packaging bags, cosmetic packaging bags, tobacco packaging bags, daily chemical packaging, etc.
3. Screen Printing
Screen printing is a method of transferring ink to the surface of plastic through a silk screen, which is suitable for printing simpler patterns or texts. Since it is a manual or semi-automatic process, it is suitable for small-batch, personalized custom production.
Features:
Can be printed on the surface of various materials, including plastic, glass, metal, paper, etc.
Suitable for printing simple patterns, text or designs with fewer colors.
Suitable for small-batch production or personalized customization.
Suitable for irregular-shaped objects, and can be printed on circular, three-dimensional and other shaped surfaces.
Application:
Small batch production, personalized customized packaging bags, gift bags, advertising bags, etc.
4. Digital Printing
Digital printing is a technology that prints directly on the surface of plastic packaging bags based on digital files. Digital printing does not require the printing plates used in traditional printing, and can generate patterns directly from the computer, which is suitable for small batch and high-quality production.
Features:
Printing directly from electronic files, no plate making is required, saving time and cost.
Suitable for small batch and high-frequency change production needs.
High precision, clear image, good color reproduction.
Suitable for complex, delicate patterns or high-quality design needs.
Application:
Small batch customized packaging bags, rapid production, personalized customized products (such as limited edition packaging, gift packaging, etc.).
5. Heat Transfer Printing
Heat transfer technology is a method of transferring pre-printed patterns to the surface of plastic packaging bags by heat pressing. This technology is usually used for patterns or texts that need to be printed on a large area, especially for complex multi-color printing.
Features:
The colors and patterns of heat transfer are bright and clear, suitable for large-area patterns and details.
Suitable for customization and short-run production, and can quickly switch designs.
The printing process is relatively simple, but it has high requirements for material selection and temperature control.
Application:
High-quality gift packaging bags, brand promotional packaging bags, clothing bags, etc.
6. UV Printing
UV printing is a printing technology that uses ultraviolet (UV) light-curing ink. The ink cures quickly after UV light exposure, ensuring high-quality and durable printing. It can print high-quality on different plastic surfaces.
Features:
UV ink dries quickly and can provide high-quality, wear-resistant and weather-resistant printing effects.
Suitable for a variety of materials, and can be printed on different types of plastics, glass and other surfaces.
Can print complex patterns and details, with bright and long-lasting colors.
Environmentally friendly, does not contain harmful solvents.
Application:
High-end packaging bags, electronic product packaging, plastic packaging of special materials, etc.
7. Embossing Printing
Embossing printing is a printing technology that forms a raised pattern by pressurizing a plastic packaging bag. It is usually used in combination with other printing technologies to make the packaging bag have a three-dimensional effect in terms of vision and touch.
Features:
The convex effect is formed by physical pressure, giving the packaging bag a unique touch.
Enhance the texture and grade of the packaging bag.
Suitable for use in combination with other printing technologies (such as screen printing and gravure printing).
Application:
High-end gift packaging bags, business card bags, luxury packaging bags, etc.
Different plastic packaging bag printing technologies have their own advantages and disadvantages, suitable for different production needs and product types. Choosing the appropriate printing technology can effectively enhance the beauty, practicality and brand image of the packaging. When choosing printing technology, companies need to consider factors such as production volume, pattern complexity, budget and environmental protection requirements, so as to choose the most suitable solution.
