Views: 457 Author: Site Editor Publish Time: 2021-12-22 Origin: Site
In the previous section, I introduced how to use AB glue. Put A glue and B glue in a dual glue cartridge according to a certain ratio, and then mix AB glue with a static mixer tube, and use it to the place where it needs to be glued. But many times, we will make operational mistakes. How to remove the AB glue after curing?
1. Both epoxy ab glue and acrylic ab glue are hard and brittle after curing, especially epoxy ab glue, it is easy to break under the action of external force, we can use this ab glue when removing ab glue Characteristic. When the ab glue is broken by an external force, the two objects bonded by the ab glue can naturally be separated. However, this method is only suitable for objects that can withstand external percussion. For example, ceramics cannot use this method, and The separated ab glue needs to be cleaned by other methods;
2. Each chemical raw material used in the production of ab glue has a corresponding chemical solvent that can melt, so the cured ab glue also has a corresponding debonding agent that can melt the glue, but the ab glue itself has good solvent resistance after curing. It is resistant to acid and alkali, and is not easy to be corroded, which means that the ab glue dissolving agent is very corrosive. When using ab glue dissolving agent to remove ab glue, you need to be very careful to avoid harm to the human body. At the same time, the debonding agent of ab glue may also corrode objects, so this method of removing ab glue is not recommended;
3. The high temperature resistance of most ab glues is about 100 degrees. In fact, when the temperature reaches a certain height, even if the ab glue is still attached to the object, its strength will drop a lot. It is easy to separate the two objects, so The ab glue can be removed by warming the ab glue to soften it. At the same time, the ab glue left on the parts that have been separated by breaking the ab glue mentioned above can also be completely removed by this method. This method of removing ab glue is suitable for large Some objects, only some objects that cannot withstand high temperatures cannot be used, such as plastics that are easily deformed at high temperatures.
Ensuring you adhere to the recommended personal protective equipment (PPE) guidelines from the safety data sheet is paramount. When confronted with an epoxy spillage, you'll find it most convenient to employ tools like a paint scraper, a sizable spatula, or even a dustpan for the initial removal of excess epoxy, whether it's on the floor or a workbench. Dispose of this bulk epoxy into an appropriately labeled container designated for hazardous materials disposal. To tackle any residual traces, make use of Isopanol or MEK.
In the fortunate event of a spill involving a single-component heat-cure epoxy, there's no need to worry about it curing – unless, of course, you've spilled it in a heated oven. Similarly, if you've only spilled either part A or part B of a two-part epoxy, there's no immediate rush to clean it up. However, when it comes to a mixed two-component epoxy, prompt action is essential before it sets. For larger spills, exercise caution, as the curing of substantial quantities of epoxy can generate exothermic reactions, potentially necessitating adequate ventilation.
When you've bonded parts together, ensure they are firmly clamped to prevent any disturbance during the curing process. Employ a cloth or paper towel saturated with Isopropanol or MEK to eliminate uncured adhesive. It's notably easier to remove excess single-part epoxy adhesive in its uncured state; once it has undergone the curing process, it becomes exceedingly tough and challenging to eradicate. Dedicate ample time to ensure a meticulous cleanup while the adhesive remains in its uncured form. Though this may be somewhat laborious, it ultimately pays off in the long run.
Cured epoxy adhesive is exceptionally resilient, posing a significant challenge to removal. You might consider resorting to tools like a hammer and chisel for particularly stubborn instances. In some cases, a small layer of cured epoxy may succumb to acetone. However, for more tenacious situations, paint stripper or methylene chloride proves most effective. It's crucial to exercise caution to avoid interfering with adhesive bonds that should remain intact. Additionally, be mindful that acetone, paint stripper, and methylene chloride can also have a detrimental effect on certain plastic substrates.