A: A no-tension sealing refers to a design where the film is not under tension during the plastic bag sealing process. This prevents the film from thinning or deforming due to stretching, ensuring the sealing strength and appearance remain consistent. This design is commonly used in "no-tension sealing and cutting machines" for producing thicker or larger bags to guarantee sealing quality.
Advantages of No-Tension Sealing Machines
• Improved sealing quality: Since no tension is applied, the seal does not thin or deform, maintaining both strength and aesthetics.
• Suitable for various bag types: Ideal for thicker or larger plastic bags.
• Increased production efficiency: Traditional sealers may create tension when sealing thicker films, but no-tension machines operate more stably.
Differences from Traditional Sealing Machines
• Traditional sealing machines: Apply tension during sealing, which may cause weak or uneven seals.
• No-tension sealing machines: Use a special mechanism to reduce or eliminate film tension, preventing thinning and deformation.
A: Punching holes in plastic bags refers to creating small holes in the bag. There are two main reasons: first, to prevent suffocation in children — especially for larger bags, the holes allow air circulation. Second, to maintain dryness or freshness of the product — in packaging that contains moisture or needs ventilation, holes can release steam and odor.
Main Purposes
• Safety Considerations: To prevent children from suffocating by putting the bag over their heads, this is a mandatory regulation in many countries (such as in Europe).
• Product Freshness: Helps release moisture from inside the bag, keeping food dry, fresh, or crispy, and preventing dampness.
• Hanging Function: Holes (round or shaped) at the top of the bag, known as hanging holes, allow products to be displayed or sold on racks.
• Gas Release: For some products that generate gas after sealing, holes release this gas to prevent swelling and maintain product integrity.
Common Applications
• Toy Packaging: To ensure child safety, larger toy packaging bags are required to have holes.
• Food Packaging: Used for items that need to stay dry, such as bread or snacks, allowing air circulation inside the bag.
• Promotional Hanging Bags: Used in convenience stores or supermarkets for hanging gifts or products for display.
Hole Punching Standards
• Different countries and regions have different safety standards for hole punching.
• Typically, plastic bags longer than a certain length (for example, 17 cm) must have holes.
• The position, size, and number of holes are also regulated to ensure their effectiveness.
3
Q: Which machine can automatically fold garbage bags?
A: The Garbage Bag Folding Machine is a specialized device designed to automatically fold and organize finished garbage bags.
In the plastic bag production process — from film blowing → sealing and cutting → bag making — if the bags need to be packed in folded form (like those sold in supermarkets), a folding machine is required.
Functions and Applications
• Automatic folding: Folds each garbage bag neatly into a fixed size.
• Stacking and collecting: Automatically stacks folded bags for easy packaging.
• Works with bag-making machines: Usually integrated with garbage bag making machines to form a complete production line.
• Improves efficiency: Faster and neater than manual folding, reducing labor costs.
Applicable Products
• Household garbage bags
• Commercial large-sized garbage bags
Simple Understanding
• The “Garbage Bag Folding Machine” is a device that automatically folds and aligns garbage bags, making them ready for packaging and sale.
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