Bubble bags are a common packaging material, which are widely used in various industries for their lightness, durability, shockproof and other characteristics. The following will describe the production process of bubble bags in detail, including raw material preparation, bag making, printing, cutting and packaging steps.
The main raw materials of bubble bags are polyethylene (PE) film and bubble layer. Before production, these raw materials need to be prepared.
1.1 Polyethylene (PE) film
Polyethylene film is the outer layer of the bubble bag, which is used to protect the bubble layer from damage. Polyethylene film can be produced by extrusion method with different thicknesses and sizes. In the bag making process, select the appropriate polyethylene film according to needs.
1.2 Bubble layer
The bubble layer is the part of the bubble bag that plays a buffering role. It consists of bubbles sandwiched between two layers of polyethylene film. The bubble layer can be produced by extrusion method with different bubble diameters and heights. In the bag making process, select the appropriate bubble layer according to needs.
Bag making is the process of combining polyethylene film and bubble layer to form bubble bags.
2.1 Extrusion film
Polyethylene granules are put into the extruder and melted by heat and pressure. The molten polyethylene is extruded through a die head into a film with the same width as the required bag width. The film becomes hard after cooling.
2.2 Combining polyethylene film and bubble layer
The extruded polyethylene film and bubble layer are placed on a platform. The two are combined together by a device such as a roller or a pressure roller. This forms a polyethylene bag with a bubble layer.
2.3 Sealing
During the bag making process, the bag needs to be sealed to ensure the integrity of the bag. The sealing can be done by heat sealing or cold sealing. Heat sealing is to heat the opening of the bag to fuse it with the polyethylene film. Cold sealing is to use pressure to bond the opening of the bag together.
Printing is the process of adding information such as text, patterns or trademarks to the bubble bag.
3.1 Printing preparation
Before printing, it is necessary to prepare the printing plate and ink. The printing plate has the desired text, pattern or trademark and other patterns, and the ink is used to transfer these patterns to the bubble bag.
3.2 Ink transfer
The ink is applied to the printing plate and transferred to the bubble bag using a device such as a roller or a pressure roller. Different printing effects can be achieved by adjusting the color and thickness of the ink.
Cutting is the process of cutting the bubble bags according to the required size.
4.1 Cutting positioning
Mark the required size and shape on the bubble bag. Use a cutter or cutting tool to cut the bubble bag according to the mark. Make sure the cutting position is accurate.
4.2 Cutting operation
Cut the bubble bag according to the required size and shape using a cutter or cutting tool. Make sure the cut edges are neat and straight.
Packaging is the process of sorting and packing the bubble bags.
5.1 Sorting
Sort the cut bubble bags and make sure that each bag has no obvious damage or stains. Check for printing errors or other quality problems.
5.2 Packaging
Put the sorted bubble bags into a box or bag of appropriate size and add labels, instructions and other accessories as needed. Close the box or bag and label it for easy identification and storage.
The above are the detailed steps of the bubble bag production process. High-quality bubble bag products can be produced through raw material preparation, bag making, printing, cutting and packaging. In actual production, attention should also be paid to issues such as quality control, equipment maintenance and safe operation to ensure the smooth progress of the production process and the stability of product quality.
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