Bubble bags, as a common and practical packaging material, are widely used in various industries due to their many advantages such as lightness, durability, and shock resistance. The following is a detailed introduction to the professional production process of bubble bags, in which bubble bag making machines play a crucial role in each link.
I. Raw Material Preparation
The main materials for bubble bags are polyethylene (PE) film and bubble layer.
● Polyethylene (PE) film:
As the outer layer of bubble bags, polyethylene film plays a key role in protecting the bubble layer from damage. It can be produced by the extrusion device in advanced bubble bag making machines, and polyethylene films of different thicknesses and sizes can be produced. In the bag-making process, the appropriate polyethylene film needs to be selected according to actual needs, and the precise control of the bubble bag making machine can ensure the stable quality of the polyethylene film.
● Bubble layer:
The bubble layer is the core part that realizes the buffering function of bubble bags, consisting of bubbles sandwiched between two layers of polyethylene film. It can also be produced by extrusion method in bubble bag making machines. There are also various specifications for bubble diameter and height to choose from. The precise regulation of the making machine can ensure the uniformity and stability of the bubble layer.
II. Bag Making Process
The bag making process mainly involves combining the polyethylene film with the bubble layer to form a bubble bag, and this process highly depends on the bubble bag making machine.
● Extruding film:
Put polyethylene particles into the extruder of the bubble bag making machine and melt them through heating and pressurization.
The molten polyethylene is extruded through the die to form a film of the same width as the required bag. The high-precision die and cooling system of the making machine ensure that the film has uniform thickness and cools quickly. The extruded film hardens after cooling, preparing for the subsequent compounding step.
● Combining polyethylene film and bubble layer:
Place the extruded polyethylene film and the prepared bubble layer on the specific platform of the bubble bag making machine.
Through the rollers or pressure rollers and other devices in the making machine, the two are tightly combined together, and at this time, a polyethylene bag prototype with a bubble layer is formed.
● Sealing:
In the bag making process, the bag must be sealed to ensure its integrity. The bubble bag making machine is equipped with advanced sealing devices, and there are two sealing methods, hot sealing and cold sealing. Hot sealing is to fuse the opening of the bag with the polyethylene film by heating; cold sealing is to bond the opening of the bag together by pressure.
III. Printing Process
Printing is an important step to add text, patterns or trademarks and other information to bubble bags, and bubble bag making machines also play an important role in it.
● Printing preparation:
Before printing, the printing plate and ink need to be prepared. The printing plate is engraved with the required text, patterns or trademarks and other content. The printing system of the bubble bag making machine can ensure the accurate installation and positioning of the printing plate.
Select the appropriate ink to ensure that it can present a clear and vivid effect on the bubble bag. The ink supply system of the making machine can stably provide ink.
● Ink transfer:
Apply the ink evenly on the printing plate.
Use the rollers, pressure rollers and other devices in the bubble bag making machine to transfer the patterns on the printing plate to the bubble bag. The printing pressure and speed of the making machine can be adjusted. By adjusting the color and thickness of the ink, different printing effects can be achieved to meet the personalized needs of customers.
IV. Cutting Step
Cutting is a key link to cut the bubble bag according to the required size, and the cutting device of the bubble bag making machine ensures the cutting accuracy and efficiency.
● Cutting positioning:
Mark the required size and shape accurately on the bubble bag. The automatic control system of the bubble bag making machine can achieve precise cutting positioning.
Use a cutter or knife to position according to the mark to ensure the accuracy of the cutting position.
● Cutting operation:
Use a cutter or knife to cut the bubble bag according to the required size and shape. The high-speed cutting device of the making machine ensures that the cutting edge is neat and straight, improving the appearance quality and usability of the bubble bag.
V. Packaging Process
Packaging is the last step in bubble bag production, mainly including classification and boxing. Although this step is relatively simple, some auxiliary equipment can also be used to improve efficiency and quality.
● Classification:
Carefully classify the cut bubble bags. Classification equipment matched with the bubble bag making machine can be used to quickly and accurately screen out qualified products.
Check whether each bag has obvious damage or stains, and at the same time check whether there are printing errors or other quality problems.
● Packaging:
Put the classified bubble bags into boxes or bags of appropriate sizes. Automated packaging equipment can be used to improve packaging efficiency.
Add labels, instructions and other accessories as needed to provide customers with more detailed product information.
Seal the box or bag and affix a label for easy identification and storage.
Through the above series of rigorous production processes, with the key role of bubble bag making machines, high-quality bubble bags are born, providing reliable guarantee for product packaging in various industries.
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