Solar energy-saving wine box film

1, generally peritoneal paper is die-cut on the peritoneal surface (is it ready?).

2. Is the line open?

3, the line is not standardized, there are impurities!

4. After the bottom paper is punched, the groove behind the thread opening is deep (solution, the groove at the thread opening is shallow).

Generally, the width of the thread mouth is equal to the thickness of the thread pressing knife plus the thickness of two pieces of paper, and slotting is easy to cause some impurities such as small particles.