The roll bag design of "Keep it fresh produce bags" is very suitable for automatic packaging on assembly lines, especially in vegetable and fruit processing plants and large supermarket distribution centers. The following are its specific packaging and sealing methods in the automated packaging process:
1. Packaging process
Roll bag installation: Install the whole roll of "keep it fresh" produce bags (pre-perforated point-break roll bags) on the automatic packaging machine, and the machine automatically pulls out a single bag.
Automatic bag opening: The packaging machine blows or stretches the bag open by air or mechanical tension to facilitate filling of fruits and vegetables. Some machines are equipped with "automatic bag openers".
Weighing/quantitative bagging: Vegetables and fruits automatically enter the bag through a conveyor line or quantitative filler to ensure that the weight of each bag is consistent (for example, 500g, 1kg, etc.).
Bag transfer and positioning: After filling, the packaging machine automatically moves the bag to the next sealing position to ensure accurate positioning.
2. Sealing method
Heat sealing: Use a hot press sealing device to heat the bag mouth and press it together to form a sealing line.
The seal is neat and firm, suitable for thermoplastic materials such as PE, PP, and degradable materials.
Wire tying sealing: Some fresh-keeping bags are suitable for tying wire or iron wire. The automatic machine has a tying device to automatically tighten and wrap the bag mouth.
Suitable for packaging bags that are opened and closed repeatedly (such as resealable designs).
Labeling sealing: Attach a label with a brand or date, and seal the bag mouth at the same time to facilitate product identification and sales.
Clip chain pressing sealing: If it is a self-sealing bag design, the machine can assist in pressing and sealing after packaging is completed to keep it reusable.
3. Other features
Point breaking line design: There is an easy-to-tear line between each bag in the roll bag, and the automatic packaging machine can accurately tear each bag to avoid waste.
Ventilation hole design: There are small vents on the bag surface to facilitate gas exchange of breathing fruits and vegetables to avoid fogging and rotting.
Printable labels: The automatic packaging machine can be equipped with a coding or labeling system to mark date, batch number, QR code, etc.
