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Home Lastest Biscuit packaging bags are serrated on both sides. Why can one side with a black mark be torn apart and the other side can’t be torn apart?

Biscuit packaging bags are serrated on both sides. Why can one side with a black mark be torn apart and the other side can’t be torn apart?

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there is a fast triangle gap on the side of many food packaging bags. This gap is really to facilitate consumers to open food packaging without the help of special tools, such as scissors, teeth and so on. It can be easily torn without being affected by any factors. However, the product packaging with convenient tear mouth is often difficult to open without borrowing tools

the packaging bag of biscuits is folded and heated on both sides of the packaging machine (the extra part on the back of the package, commonly known as the “middle seam”) and the temperature rise suture of the port (the two ends are similar to the sawtooth incision, commonly known as the “end seam”)

“middle seam” is not a suitable part to open the package. Consumers are more used to opening the package from one side of the product. The zigzag “end seam” has the effect of convenient opening. You can choose to open it from any notch on the left and right sides, which means you can choose the size of the opening.

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