FAQ for hot melt opp labeling machine glue
Due to the varieties of glue equipment technology and the environment factors probably you will meet some problems during use the machine, here you will find some advises:
Strength drawing of glue
1.The operating temperature is too low
Generally, the recommend temperature is 130℃ to 150℃.When it happens strength drawing with the glue, you could adjust the temperature of glue tank and roller within 130℃ to 150℃.But the temperature shouldn’t be much more higher, otherwise it could caused the stable of glue and label wrinkle.
2.Temperature of glue tank not warm enough
The glue tank should be pre-heated before open the machine, to ensure it can reach the standard temperature.
3.Affected by debris
If there are label fragments and debris on the glue roller or vacuum drum, it will be caused glue drawing.
4.The excess gluing
If the label was excess glued, it also will be caused glue drawing.
5.Low temperature
If the operating temperature is lower, the temperature of glue will be easy to higher viscosity, and leads to the glue drawing.So you should adjust the temperature more higher.
6.High viscosity of the glue
If the glue is high viscosity, although you have adjust the temperature, gluing and the temperature advisor ,but still can’t solve the drawing problem.At this time, you should change the glue.
Labeling wrinkle
1.The operating temperature is too high
The main reason of labeling wrinkle is the higher temperature, you should adjust it to the recommend scope.
2.Excess gluing
If the label was excess glued, it also can cause labeling wrinkle.
3.The label material
Label thickness, temperature and other factors also related to the labeling wrinkle.
4.Wrong position of the label roller
If the label roller on the vacuum drum has a wrong position, it is in higher position than others, it will be caused the label and the roller too tighten to labeling .
Bad paste
1.Less gluing
If the label is not gluing enough, it will hard to label the products.The glue tape on the vacuum drum may cause less gluing.
2.High temperature of glue tank
As the glue tank keeps high temperature in a long time, the glue will excessive oxidative and damage.Thus the viscosity will be decreased ,especially the low temperature resistance also will be greatly undermined.
3.The glue haven’t been added in time
Normally the hot melt glue should keep the level of volume range to 1/2 or 2/3, in order to avoid the shortage of glue in the glue tank.So how should we add the glue in time?The best method is to add the glue many times, each time with small quantity glue.To do this, we could keep the stable of the glue ,also it could keep the volume of glue in a reasonable rage.
4.Gluing position shift
Due to the adjustment of equipment, it happens that the label has been wrong position gluing, and leads to the label can’t paste on the container.
5.Finished glue storage conditionsThe finished products should be preserved in a good condition.If the products are exposed in sunshine or cold dry environment, the poor storage conditions can push the glue aging, and reduce the vanity of label.
6.Mixed with different kinds of hot melt glue:
Due to incompatible system is different between different kinds of hot melt glue, so if they have been mixed use, it will decrease the viscosity than use it alone.
In a word, when you are ready to start a new project, you should pay more attention to every details, because details determine the success.
