1. Heat Sealing Performance
   • Precision of Heat Sealing Temperature Control: Different bag-making equipment has different precision in controlling the heat sealing temperature. High-precision heat sealing equipment can accurately reach the set heat sealing temperature, which is crucial for producing high-quality packaging bags. For example, when processing laundry detergent bags, precise heat sealing temperature is needed to ensure that the inner PE film achieves sufficient heat sealing strength during the process without becoming too thin or brittle due to excessive temperature. If the equipment has poor temperature control precision, it is challenging to ensure the heat sealing quality of each bag, potentially leading to insufficient sealing strength or quality issues such as damage in drop tests.
   • Uniformity of Heat Sealing Pressure: The uniformity of heat sealing pressure in bag-making equipment also affects the bag-making process. High-quality bag-making equipment can apply uniform pressure across the entire heat sealing area, ensuring consistent sealing results. If the pressure is uneven, some areas may not have sufficient sealing strength, which can easily lead to seal breakage during use, especially for packaging bags with high sealing performance requirements, such as food and pharmaceuticals.
2. Tension Control
   • Impact of Film Tension After Slitting: In the slitting process before bag-making, controlling the film tension is crucial. If the bag-making equipment cannot adapt well to the tension state of the film after slitting, it may lead to issues such as stretching, wrinkling, or edge running during the bag-making process. For example, for films like PE, PP, and VMPET, excessive winding tension during slitting may cause film stretching. If the equipment cannot make appropriate tension adjustments for this already stretched film during the bag-making stage, it will further affect the flatness and dimensional accuracy of the bags and may reduce their mechanical strength.
   • Tension Adjustment Function During Bag-Making: During the bag-making process, suitable tension is necessary to ensure the shape and quality of the bags during film transportation, folding, and sealing. Advanced bag-making equipment has flexible tension adjustment functions, allowing real-time adjustments based on different film materials, bag sizes, and shapes. This helps prevent the film from becoming loose or overly tight during the bag-making process, thus improving efficiency and quality.
3. Static Electricity Control
   • Compatibility of Static Electricity Generation and Protection Equipment: During operation, the friction between the film and the equipment components can generate static electricity. Some bag-making equipment may not have good static electricity protection measures or may have poor compatibility with static discharge equipment. For example, when packaging powdered products like infant formula that are prone to static adhesion, if the equipment cannot effectively control static electricity, it may cause the powder to adhere to the sealing area, leading to poor seals and product leakage. Therefore, selecting bag-making equipment with good static elimination devices or that can easily connect to static discharge equipment is essential for preventing static interference in the bag-making process.
4. Dimensional Accuracy
   • Cutting and Folding Precision: The precision of the cutting and folding components of the bag-making equipment directly affects the size and shape of the bags. High-precision cutting devices can ensure that the edges of the bag openings and seals are neat and meet the size requirements. For bags with complex folding structures, such as three-side sealed bags and four-side sealed bags, the folding precision of the equipment is critical for the bags’ appearance and functionality. If the cutting and folding precision of the equipment is insufficient, it may result in size deviations, crooked openings, and other issues that negatively impact the packaging effect and subsequent use of the product.
   • Positioning Precision: During the bag-making process, precise positioning is necessary for tasks such as printing patterns and determining sealing positions. Accurate positioning ensures the aesthetic appeal of the bags and correct display of product information as well as sealing quality. For example, for packaging bags with brand logos or product descriptions, poor positioning accuracy of the equipment may lead to misalignment of printed patterns, affecting brand image and product recognition.
5. Production Efficiency
   • Running Speed of the Equipment: The running speed of the bag-making equipment directly relates to production efficiency. The faster the equipment operates, the more bags can be produced within a unit of time, thus enhancing overall production efficiency. However, excessive speed may compromise heat sealing quality, tension control, etc., so a balance between speed and quality needs to be found. High-quality bag-making equipment typically has a high running speed and stable performance, capable of meeting large-scale production demands.
   • Level of Automation: Modern bag-making equipment often adopts an automation design, which reduces manual intervention and enhances production efficiency. Highly automated equipment can perform multiple processes such as automatic slitting, conveying, and sealing, thus lowering labor costs while increasing production accuracy and consistency. Choosing equipment with a high level of automation can significantly improve the overall efficiency and product quality of the bag-making process.
6. Maintenance and Care
   • Ease of Maintenance: The design of bag-making equipment should consider the convenience of daily maintenance and care. Regular maintenance during the equipment operation can effectively extend its service life and improve production stability. If the maintenance of the equipment is complicated, it may lead to prolonged downtime, thereby impacting production efficiency. Therefore, when selecting bag-making equipment, it is advisable to prioritize equipment that is easy to maintain and care for.
   • Availability of Spare Parts: During the use of bag-making equipment, some failures or wear are inevitable, and timely replacement of spare parts is key to ensuring normal operation. Therefore, choosing equipment brands with a high availability of spare parts can reduce repair costs and downtime, ensuring production continuity.
7. Cost Control
   • Initial Investment Cost of Equipment: The initial investment cost of the equipment is an important consideration when selecting bag-making equipment. High-performance, high-precision equipment usually comes at a higher price, but in the long run, it can lower the unit product cost by improving production efficiency and product quality. Therefore, when choosing equipment, it is necessary to consider the overall cost-effectiveness.
   • Operating Costs: In addition to the initial investment, the operating costs of the equipment are equally important, including power consumption, material waste, and labor costs. Selecting equipment with low energy consumption and high material utilization can significantly reduce production costs and enhance the competitiveness of the company.

In summary, the choice of bag-making equipment has a far-reaching impact on the bag-making process, involving multiple aspects such as heat sealing performance, tension control, static electricity control, dimensional accuracy, production efficiency, maintenance and care, and cost control. When selecting suitable bag-making equipment, companies should consider their production needs and market conditions comprehensively, ensuring the smooth progress of the bag-making process and the high quality of the products.