Glass bottle before printing processing

The bottle of prepress processing

in order to obtain good adhesion of printing ink to printing substrates, must carry on the polarization treatment on the bottle, bottle surface tension to make its surface tension is not lower than 3. 8× 10 - 2N/m( One kind, the printing ink adhesion to substrates have good substrates surface tension is the most basic conditions for at least 50 dyn/cm) above 。

the bottle for polarization treatment method is mainly a flame of fire. Flame treatment its principle is by high temperature plastic surface decontamination, and melt surface membrane layer, thus can improve the surface of the plastic bottles, to improve the surface printing ink adhesion performance. To sum up, one must ensure the surface of the substrates cleaned before printing and effective polarization processing, bottle surface treatment is not complete, will inevitably have an impact on adhesion.

flame treatment

flame processor is composed of conveyor belt, tapered column, flame nozzle and tank, etc. Insert plastic bottles in the conical column on when using, conveyor belt moving at a constant speed forward, not to the front of the flame spray nozzle, tapered column began to turn, also turns the bottle at the same time, blue flame ablation was carried out on the surface of plastic bottles, which can improve the surface of the plastic bottles, increase and the adhesion strength of the ink. And the intensity of the flame, the operation of the conveyor belt speed, smooth bottle turns the degree are directly affect the treatment effect, in which the key bottle turns smooth degree. Smooth degree is proportional to the size of the bottle, the shorter the bottle, the smaller the radius of the effect after processing. For larger bottle, we must take measures to increase its smooth degree, the commonly used method is in the conical column of attaching nylon sleeve, the inner diameter of the set of a cone-shaped, outer diameter and bottle size one. Jacketed bottle can't fallen, must pull out artificially. Should be treated by the flame plastic printing immediately, otherwise, can reduce the plastic surface, easy to secondary stained with dust, affect the printing ink adhesion. Caijing glass ink _ home appliance glass ink

flame treatment effect test

the easiest way is to use surface tension test pen for testing. Choose three. 8× 10 - 2 n/m specifications of the surface tension test, if test stroke of local fluid evenly spread out, not shrink, suggests that treatment effect is better; If liquid mark produce contraction, or liquid mark one part, one part is not contraction, then deal with inadequate. Or you can use & quot; Water treatment & quot; To test, if handled well, on the surface of plastic bottles, can form one layer of dense & quot; Water film & quot; That screen printing counterparts say & quot; Water & quot; 。 Timeliness of polarization treatment on the surface of the bottle processing effect has the efficiency of the set and the longer the time, the worse effect, and the adhesion strength of the ink will be sent to ensure that the printing ink adhesion, after processing should be printed in a timely manner. Investigation now, due to the limitation of customer production process, most of the printing factories polarization treatment and not with one department, it will cause printing lag, thus affecting ink adhesion with the bottle.