The intensity of flame, the running speed of conveyor belt and the stability of bottle rotation directly affect the treatment effect, among which the stability of bottle rotation is the most critical. The stability is directly proportional to the size of the bottle. The shorter the bottle, the smaller the radius, and the better the effect after treatment. For larger bottles, we must take measures to increase its stability. The common method is to attach a nylon sleeve on the conical insert column. The inner diameter of the sleeve is also conical, and the outer diameter is consistent with the size of the bottle mouth. The jacketed bottle cannot fall by itself and must be pulled out manually. The flame treated plastic bottle shall be printed immediately, otherwise the surface of the plastic bottle can be reduced, and it is easy to get dust again, which will affect the adhesion of the ink.
Flame treatment effect test:
The simplest method is to use the surface tension test pen for detection. Select 3.8 × For the surface tension test pen of 10-2n / M specification, if the liquid mark is evenly spread and does not shrink at the place where the test stroke is passed, it indicates that the treatment effect is good; If the liquid mark shrinks, or part of the liquid mark shrinks and part does not shrink, it indicates that the treatment is insufficient. Or it can be detected by "water sprinkling treatment". If it is well treated, a dense "water film" will be formed on the surface of the plastic bottle, which is often referred to as "water filling" by silk screen printing peers.
Timeliness of bottle treatment surface the effect of polarization treatment has certain timeliness. The longer the time, the worse the effect, and the worse the adhesion with ink. Ensure the adhesion of ink. Print in time after treatment. The survey found that due to the limitations of the customer's production process, the polarization processing and printing in most printing plants are not the same department, which will lead to printing lag, thus affecting the adhesion between ink and bottle.
