Ten matters that should be paid attention to when producing water-based adhesive compound

Ten matters that should be paid attention to when producing water-based adhesive compound

2023-01-10 18:09:52
admin

Because the water glue is bonded together by the film forming principle, its compound effect is very stable, and the product can be cut immediately.If the composite quality is bad because of the process or substrate, it can also be seen in the first time off the machine, and it will not be found after mass production.Therefore, the composite packaging products use water-based glue instead of solvent compound glue, not only to meet the requirements of safety, health and environmental protection, shorten the delivery cycle, but also to reduce the transfer of aluminum plating film.But in the use of some process control points to pay special attention to, according to the long-term use experience of the summary, for the peer reference.But in the use of some process control points to pay special attention to, according to the long-term use experience of the summary, for the peer reference.
1, because the amount of water-based glue is very small, the rubber roller should choose the cable dense and shallow laser engraving roll. Usually 200 wire / 35μdepth, the laser roller has a large mesh shape opening, which ensures the glue is transferred to the film better
2.Before using water glue, be sure to stir the glue slowly in the bucket for 5 to 10 minutes to ensure that the various additives in the glue are mixed evenly.
3.Before gluing to detect the surface tension of the film, it is best to use Dyne liquid, rather than Dyne pen. Different film surface tension requirements are different, specific reference is as follows:

Material Name	Corona value water-based adhesive
PET	≥50dyne shoes adhesive glue
BOPA	≥52dyne
BOPP	≥38dyne adhesives glues
CPP	≥38dyne spray adhesive
PE	≥38dyne adhesive for marble

4. as far as possible to use the reverse rotation of the rubber roller. We have observed in the actual production that the reverse flattening roller has a great impact on the appearance, especially when the composite transparent non-printing or non-full-plate pattern products, the appearance effect can be more visible. By adjusting the speed of the rubber roller, the composite appearance can achieve excellent results.
5, the oven temperature is set from low to high, a section of temperature is generally 70~75℃, 75~80℃, 80~85℃ (the temperature to the set temperature can be turned on)
The inlet air and exhaust air of the oven should be put to the maximum. The effect of the air volume on the drying of water-based glue is more important than the temperature. The temperature of some composite rollers is generally set to 70~80℃, and the pressure of composite rollers can be set to be larger.
6.It is best to have a circulating pump between the glue tank and the glue bucket. Clean up the pump before use
7.In order to prevent blocking, the scraper should be stopped and the upper rubber roller should be soaked in the glue to keep rotating.
8.the machine speed is too high will produce bubbles, you can put a glue stick in the groove.
9.After use, wipe the glue on the rubber roller with water first, and then clean it thoroughly with ethyl ester. If the plate has been blocked, you need to use special washing liquid cleaning.
10.the storage temperature of water-based glue can not be lower than 5℃, nor can it be exposed to the sun, and can not be polluted by dirt, solvents and so on.acry

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