Flexographic printing has become the leading technology for inline printing on shopping bags (shoppers) destined for the retail sector. Its widespread adoption is due to numerous advantages in terms of efficiency, sustainability, and cost-effectiveness. When integrated with modern high-speed bag production lines, flexographic printing enables a continuous and high-performance process, establishing itself as a go-to solution for converters and bag manufacturers.
Mass production of shopping bags: advantages
Flexography, commonly known as “flexo,” is particularly suited to the large-scale production volumes required by supermarkets and large retailers. Its main strengths include:
- High operational speed: Modern flexographic printing machines are engineered for high-speed operation, reaching print speeds of up to 600 m/min. This makes them ideal for meeting the constant and high-volume demand of the retail packaging market.
- Cost-effectiveness for large runs: While flexible plate production involves an initial investment, the unit cost significantly decreases over large volumes. The durability and reusability of plates also enhance efficiency for repeat jobs.
- Substrate versatility: Flexographic printing supports a wide range of substrates, including plastic films (such as polyethylene) and paper—materials commonly used in shopping bag production.
Inline integration: a fully automated process
Integrating flexographic printing units with high-speed, automated bag-making lines represents a strategic advancement in efficiency and productivity. This continuous, automated system unifies the various stages of production, eliminating intermediate handling and optimizing the overall workflow.
By directly linking the printing process with equipment such as extruders or sealing units, material waste is minimized, and the entire production chain becomes more streamlined. This synergy between printing and converting offers numerous benefits:
- Increased productivity: From blank film to finished bag in a single, continuous process—production cycles are faster and output is higher compared to offline systems.
- Reduced labor costs: Automation minimizes manual handling, reducing operational expenses.
- Material waste reduction: Precision ink control systems and automated workflows minimize waste during setup and production, optimizing resource usage.
Converting optimization for seamless processing
Automatic sealing and bag-making machines, when integrated with in-line flexographic printing, enable the production of printed and finished shopping bags in a single, synchronized workflow. The printed film is fed directly into cutting and sealing units, eliminating intermediate transfers and ensuring maximum efficiency and consistent precision.
This seamless integration improves production consistency and significantly reduces downtime.
Water-Based inks: sustainability and safety
A key advantage of modern flexography is the use of water-based inks, offering a sustainable alternative to solvent-based systems.
Environmental and operational benefits include:
- Low Volatile Organic Compounds (VOCs): Water-based inks contain significantly lower levels of VOCs, reducing air pollution and creating a cleaner, safer working environment, while lowering the overall environmental impact of the facility.
- Eco-friendly composition: These inks are non-toxic, often biodegradable, and reduce dependence on non-renewable resources like petroleum.
- Cost savings: Using water-based inks reduces the costs associated with hazardous waste disposal and environmental compliance.
The ideal solution for converters and bag manufacturers
Flexographic printing presses efficiently meets the demands of the shopping bag industry: high speed, consistent quality, cost control, versatility, and sustainability. The ability to integrate printing and converting in a single automated process enables high levels of productivity and efficiency.
Written by Luigi P. | Team Giugni®
