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4 reasons for broken bags in composite packaging bags

by:Supouches Packaging     2022-09-26
The breakage rate of composite packaging bags is an important aspect that affects the suitability of product packaging, and it determines whether the packaging is feasible. There are many factors that affect the broken bag of the composite packaging bag. Below, professional flexible packaging manufacturers will analyze the 4 reasons why the composite packaging bag will be broken, so that you can better understand the composite packaging bag. 1. The peeling strength of the composite film Assuming that the peeling strength of the composite film is too low, it is difficult to meet the requirements of the multi-layer composite materials under the same force, resulting in the force cannot be well dispersed, then in the process of falling, it will cause bag breakage. In addition, in high-temperature cooking bags, because some adhesives have poor heat resistance, especially in some complex structures (such as BOPAl5/Al7/CPP70), during high-temperature cooking, it will also cause cracks at the sealing edge, The phenomenon of delamination of composite films. 2. Bag-making process The bag-making temperature is too high, which will cause the performance of the heat-sealing material at the heat-sealing place to decline, thereby affecting the bag breakage rate of the composite packaging bag; the bag-making pressure is too large, causing the heat-sealing material at the heat-sealing place to be squeezed. out, the heat-sealing material that seals the door drops, and then causes the bag to break when it falls. The heat seal of the bag is too sharp, or there are mechanical flying thorns, which will also damage the heat cut edge of the bag, and then cause the bag to break. 3. In terms of materials, the material must have sufficient thickness. If the thickness is insufficient, the strength of the composite film will be insufficient, and then the problem of bag breakage will be caused: pay attention to the addition of recycled materials in the material, and the recycled materials will be reduced in all aspects. Insufficient strength, which then causes bag breakage. During the manufacture of PE film, LLDPE and mPE are added to improve the strength and flexibility of PE, thereby reducing bag breakage. Assuming that the packaging used in the low temperature freezing environment, it is necessary to use low temperature resistant packaging materials (such as BOPA) to produce the composite film, otherwise it will cause the brittle crack of the composite film in the low temperature freezing environment. 4. The influence of packaging When packing some heavy objects or powder items, such as salt, washing powder, etc., after filling such items, the air in the bag should be discharged before heat sealing to reduce the size of the packaging bag. The force of the wall allows the solids to be directly stressed, thereby reducing the breakage of the bag.
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