Common quality problems and solutions of PVC card

1. Color deviation

Because most PVC cards are printed by making up, and dozens of sheets are made up on the same PS plate, it is difficult to take care of each sheet when printing and color matching. Sometimes the color of one sheet is aligned, but the color of the other sheet deviates very far. The solution to this problem is to use special edition printing, that is, one PS only prints one sheet, so that you can follow the sheet according to this sheet and the color will be more accurate.

Sometimes the reason for the color deviation is that the material color changes greatly, resulting in the printed PVC card is far from the usual one. For example, if the material color is black and the finish is not enough, all the printed cards will be dark and black. This problem can only be solved by changing materials.

2. PVC card is scratched seriously

The main reason for this quality problem is in the synthesis process. Because the PVC sheet is pressed with steel plate in the process of card synthesis, the two PVC sheets are combined by heating and pressurization. If the finish of the steel plate is not good enough, or the steel plate is not well maintained and worn, obvious scratches will be left on the surface of the PVC sheet when pressing, which will affect the beauty of the card. The solution is to replace the worn steel plate.

3. Card deformation

The reason for the deformation of PVC card is that when punching convex code, if the press pressure is set too large, it is easy to deform the card. The solution is to reduce the press pressure. Another situation prone to deformation is that one side of the PVC card is added with synthetic film, while the other side is not. Due to the different deformation coefficients of synthetic film and PVC, one side of the card has synthetic film, and the other side does not, which is easy to cause the card to bend. The solution is to add synthetic film on both sides of the card, or not on both sides.

4. PVC card layering

The reason for delamination is that the synthesis time and temperature are not enough to reach the melting point of PVC sheet, or the synthesis time is not enough, resulting in the incomplete bonding of two PVC sheets. The solution is to increase the synthesis temperature or prolong the time of the synthesis process.

5. The edge is not smooth

The reason for this problem must be that the die for punching card is worn too much or there is a gap. The solution is to repair or replace the die.