There are many factors that affect the performance of the multi-layer paper/PE kraft paper bag. Any step in the entire production process may affect the performance of the paper bag. The main influencing factors are as follows:
1. Canister
①The appearance is unqualified
Printing ink pollution, equipment oil stain pollution, raw material dirt pollution, severely bad wrinkles, glue sticking out of joints, glue sticking inside out.
②Glue point
More glue dots, less glue dots, glue dots are too small, and glue dots are too large.
③Size
Uncut and scrapped, inconsistent with the cut size, off-line printing size, unqualified split layer.
④Process
The paper configuration is inconsistent, the gluing process is inconsistent, and the punching process is inconsistent.
⑤PE
Laos side or not side.
⑥ Side unqualified
Poor welding at the bottom.
2. Bottom making
①The appearance is unqualified
Printing ink pollution, lack of printing on the bottom paper, unprepared oil pollution, raw material pollution, serious wrinkles, leaking glue sticking, and glue overflowing from the seam.
②Glue point
The size of the glue dots, the glue dots are not sticky, the glue overflows from the bottom of the mouth, and the glue overflows from the bottom of the mouth.
③Size
The length of the tube is incorrect, the size of the bottom of the mouth is incorrect, the size of the valve port is not consistent, and the connecting angle is too large.
④Process
The bottom of the mouth is folded in the wrong direction, the paper on the bottom of the mouth is reversed, and the craft of the valve port is incorrect.
⑤PE
Going off track, PE glue dots are not sticky, PE is discounted.
At present, in addition to food packaging, multi-layer paper/PE kraft paper bags are used in the fields of powder products such as chemicals, feed packaging, cement packaging, starch packaging, and their application range and environment are gradually expanding. It can be seen that multi-layer paper/PE kraft paper bags are gradually expanding. The future development prospects of paper/PE kraft paper bags are broad. With the high technical content of powder products such as chemicals, feed packaging, cement packaging, starch packaging, and the increasing demand for functionalization, packaging research and development on multi-layer paper/PE kraft paper bags should gradually move towards high technical content and functionalization. Expansion of the direction, so as to develop new varieties in different fields.
