How to judge the quality of water-based glue?
Several simple methods to judge the quality of water-based glue:
①Pour the glue on the flat glass to observe its rheology, and swing it left and right to observe its rheology.
Conclusion: The flow of glue is too fast, indicating that the glue is too thin. Poor fluidity, too thick is not conducive to bonding.
②Dip it with your hand to observe its viscosity.
Conclusion: It can be drawn slowly, and it is better to have a little stickiness.
③Pour it on a small piece of glass to observe its film forming time.
Conclusion: In about 1-2 minutes, the film-forming time of the glue that can form a thin film on the surface of the glue is better.
④ After the glue is basically solidified, use your finger to dip it in water to purify it to observe its cohesion.
Conclusion: Glue dissolves quickly – poor cohesion. The glue is cloudy after it is removed – too much filler has been added.
⑤Use the two allegro plates to stagger them and stick them together, and measure the tension after 24 hours. Soak in the blisters for a day and then dry to observe the color change.
Conclusion: If the change in the tensile force of the glue is small, the water resistance of the glue is very good. Otherwise it’s bad.
In the above “distinguish the quality of water-based glue” test, if you touch the glue with your hands, wash it with water before the glue is dry.
