Causes and solutions of poor opening of vacuum food packaging bag in bag making process
Causes and solutions of poor opening of vacuum food packaging bag in bag making process
1. Cause: the film is not cooled after printing. Solution: cooling should be sufficient before coiling.
2. Cause: excessive coiling tension. Solution: 1. Reduce the winding tension. ② The film should be cooled sufficiently before coiling.
3. Cause: both sides of the film are corona treated. Solution: corona treatment is only applied to printing and composite surface.
4. Cause: poor opening of the film. Solution: choose the film containing anti adhesion agent.
5. Cause: the cutting line of bag mouth is too close to the heat sealing line. Solution: the cut-off line should be more than 2-3mm away from the heat sealing line.
6. Cause: the opening of compound food packaging bag is poor. Solution: 1. Blow molding film is selected for inner film. ② During curing, the oven temperature should not exceed 60 ℃. ③ The film should be cooled sufficiently before bag making.
Packaging bag knowledge: what is gravure printing of composite food packaging bags?
Gravure printing industry is referred to as gravure printing. Gravure printing is one of the four major printing methods. It is named after the printing plate. In other words, all printed patterns and characters are concave on the printed plate. During printing, the excess ink (not the ink on the printing surface) on the printing plate is scraped off, and then it is applied to the printed packaging bag between the printing plates through the embossing rubber roller Pressure, a printing method in which ink is pressed from the concave to the packaging bag to achieve printing purpose. http://m.switzerland-hotel.com/
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