DNP CL-500, Service Manual

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SET UP GUIDE
3. VARIOUS CONDITIONAL SETTINGS
(1) Card warping case
When the laminator is connected to a re-transfer printer, the card temperature is high during printer output. Hence,
cards with a low heat tolerance such as PVC cards are prone to warping due to re-heating during laminating. This is
especially prominent when laminating after printing on single-side. An example of warping for transfer energy during
single-side print is shown on Diagram 1. In consideration of such characteristic, temperature and speed conditions are
defined in CL-500 default settings to minimize warping while ensuring the adhesiveness. The required transfer energy
for adhesion is according to the thickness of the film to be transferred and follows the order of overlay<0.6mil patch<1mil
patch.
Diagram 1. PVC card warping case during single-side printing
When the laminator is connected to a direct printer, setting area is limited left hand of diagram 1, and the cards have a
tendency to concave on laminated surface.
Depending on the card material, manufacturing method, environmental conditions where the card is used and the
setting conditions of the connected printer, the warping condition and most appropriate condition may differ. The following
section describes the method to set the most appropriate conditions.
(2) User Mode settings
1) Heat roller temperature : temp
2) Laminating speed : speed
Set the energy to transfer from the heat roller to the card via the film, based on a combination of both factors. The
higher the setting temperature and the slower the speed, the greater the energy becomes and this affects card
warping greatly. The lower the energy, the better it is to prevent the card from warping. However, as shown in
Diagram 1, as the warping behavior is different in the setting area for 0.6mil patch and overlay and the setting area
for 1mil patch, precaution is required. When the transfer energy is too low, this will damage the adhesion to the card.
Hence, be very careful when lowering transfer energy. Refer to Chapter4 Card Adhesiveness for the evaluation on
adhesiveness.
For high heat tolerance cards that do not warp easily, it does not matter if the energy is set high.
0.6mil patch setting
temp 155
speed 8.5mm/sec
Overlay setting
temp 130
speed 8.5mm/sec
1mil patch setting
temp 170
speed 5.5mm/sec
Transfer energy
∝
temp / speed
Transfer energy
Card temperature
high Card temperature
low
Example of PVC
card warping
1mil patch area
0.6mil patch
Overlay area
Card warping Convex
on laminated surface
Concave on
laminated surface
Warping limit
Warping limit