Increasing PEI adhesion

Updated 10 days ago ​by Tomáš Chvalina

In some special occasions, like a tall object with a very small contact area with the print surface, you might need to increase the adhesion. Fortunately, PEI is a very chemically resistant polymer and you can temporarily apply other adhesion solutions without damaging it. This also applies to materials which would not stick to PEI otherwise, like Nylon etc. 

Brim

Before applying anything to the bed, consider using Brim option in Slic3r or PrusaControl which increases the surface area of the first layer. 

You can easily turn this feature [on/off] in Prusacontrol or you can find it in Print settings - Skirt & Brim in our Slic3r PE.

  1. Great for increasing print adhesion of tall objects.
  2. Perfect once you are printing multiple objects at once and you want to make sure they are sticking well to the surface.


When you should use glue?

Glue is a great tool with which you can increase your adhesion. However as we already have PEI surface. There is a little need for glue at all. From our experience it is only needed with:

  1. PETG/Nylon - to protect your PEI sheet.
  2. Other more exotic materials which do not ever stick like basic materials.
  3. You can easily clean the glue with Window cleaner or Dish soap water.

The industrial glue which holds the PEI sheet on the heatbed itself softens when temperatures greater than 110 °C are used. If higher temperatures are used, the glue can migrate under the PEI and create slight bumps on the surface.

Acetone

PEI can lose its adhesive powers after a couple hundred hours. Wipe it thoroughly with acetone when you see models getting loose to restore the adhesion. 

!However do this procedure only occasionally. As overuse of acetone will actually make PEI brittle!

ABS juice

For ABS prints, ABS juice can be used and later cleaned with pure acetone. Be very gentle when applying the juice and do so while the bed is cold. Prints will attach very strongly. 

Prepared juice can also be purchased in our e-shop. Unfortunately, UPS service does not allow us to deliver any acetone-based products due to shipping constraints. In that case you get only the bottle and ABS from our e-shop and you have to source the acetone locally. 

If you would have any other questions, then you can use the CONTACT button on the top right corner.





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