With the improvement of living standards, packaging bags can be seen everywhere in daily life, all kinds of clothing packaging bags, electronic packaging, industrial products packaging bags, aluminum foil packaging bags and other patterns. A good packaging bag is also through the production process and strict standards. What problems will be encountered in the process of manufacturing packaging bags? How should we solve it? Share it below.

Wrinkle bag

1. The thickness of the substrate is uneven, and the film difference is too large.

2. The base material is unrolled and skewed.

3. When the amount of glue is too much or lack thereof, interlayer sliding will occur. Uneven gluing can also cause local wrinkles.

4. The adhesive is not boring, the residual solvent is too much, the adhesion force is small, and the displacement of the two substrates after compounding.

5. The composite film is directly wound without cooling or cooling, and the high temperature and soft composite film is simply wrinkled.

6. Tension compound pressure setting is improper.

7, tension control is not appropriate, put, winding tension is not coordinated, do not match.

8. Each guide roller is not parallel.

9. The appearance of each guide roller is not clean, with foreign matters adhered, and the appearance of the guide roller may be uneven, with pits, scratches, bumps, etc.

Solution

1. Replace the qualified film.

2, the position of the film, so that it does not occur in the transmission process of deflection.

3. Adjust the amount of glue applied and apply glue evenly.

4, adjust the process parameters, so that the adhesive can be full of dry, decreased the residual amount of solvent.

5. The composite film should be wound after sufficient cooling.

6. Conditioning compound pressure.

7. Adjust the unwinding and winding tension so that the tension of each part matches each other.

8. Adjust the parallelism of each guide roller.

9. Clean the surface of each guide roller, replace the damaged guide roller, and ensure that the surface of the guide roller is flat, smooth and clean.

Packing bag hair sticky

1. In the process of packaging bag printing, the drying speed of the ink is not suitable for the printing speed, resulting in some solvents still remaining in the printed ink layer, softening the ink layer, and making the composite film sticky.

2. The adhesive is not completely dry, and the residual solvent gradually penetrates into the ink layer, making the ink layer soften and sticky.

3. The plasticizer in the plastic film moves to the ink layer, so that the film softens and sticks.

Solution

1, according to the practice of the situation to adjust the dry speed of the ink, and make it full of boring

2, adjust the process parameters to ensure that the adhesive can be plenty of boring, so that the amount of residual solvent control within the minimum limit.

3. Replace plastic film

The packaging bag has "small pockmarked"

1. There are impurities in the adhesive. There is too much dust in the air in the workshop environment. There is also dust in the hot air blown out of the drying tunnel after gluing. The dust sticks to the adhesive layer and is sandwiched in the center of the two-layer basement membrane when compounding.

2, two-component reactive adhesive solvent is simply affected by temperature and white, turbidity, resulting in "small pockmarks" increased.

Solution

1. Filter adhesives; Adhere to environmental cleanliness; Adhere to the cleaning treatment of glue barrels and glue trays; Use high-mesh filter screens or other filter materials to remove dust from hot air at the air inlet of the drying tunnel.

2, "turbid white" glue chaos agent can not be used again