First, the print composite bond is poor

1.Check whether the printed matter itself belongs to special paper;

2.Whether the printing ink is caused by excessive auxiliary materials or special ink;

3.Small amount of glue;

4.Low temperature or small pressure of hot press roller;

5.BOPP membrane corona is processed

Second, the brightness of printed matter is poor after composite

1.Printed matter itself, paper, ink;

2.When composite, the temperature of the hot press roller is low;

3.Less colloidal water;

4.Large amount of powder spray;

5.Too little pressure

Three, composite products have flower points

1.Uniform strip causes: uneven coating of the roller, cleaning of the scraper is not clean, glue particles or impurities, filtered and then used;

2.When the roller is out of round and unbalanced, the glue is uneven or wavy.

3.Uniform into a ripple: the speed of the rubber roller is too slow or too fast;

4.Uneven flower point: there are stolen goods on the glue roller, there are stolen goods on the surface of the pressing roller, and the glue evenly controls the speed above the glue

Fourth, the composite product foaming

1.Printing spray quantity is large, additives are too heavy;

2.Pressing roller temperature is too high;

3.Too much glue water drying or too little glue water;

Five, paper wrinkles

1.Whether the printed product is damp and deformed;

2.Whether the cold roller is balanced;

3.Whether the amount of glue is too large;

4.Whether the pressing roll is deformed;

5.Heating roller temperature is too high;

6.Printing ink is not dry;

Six, slow speed

1.Large amount of glue, thick glue layer;

2.Drying and heating, low roll temperature;

3.Large amount of ink layer and powder spray;

4.Low glue grade should be upgraded;