Glue HDPE & PP with 2-component adhesives
2-component adhesives can offer a strong bonding and they are easy to use. On the other hand they are extremely wasteful since they usually come in single-use packaging.
We generally don't recommend glueing parts together as it will make the disassembly harder at the end of the product’s life. So check out other joining techniques first!
If this is still needed, here some guidelines. —
Step 1 - Stay safe
Recommended safety equipment:
- ABEK mask
- safety glasses
Step 2 - Which is the best Adhesive?
But we want to show which adhesive offers the best performance in case you see no other option.
Among the world of 2-component adhesives there are several types: epoxy, methyl methacrylate, polyurethane... We found that methacrylate adhesives work best for bonding plastic. These can especially be useful when trying to bond PP and HDPE which are generally difficult to bond with other solutions.
Of course the composition of the adhesive will change depending on the brand. Based on our experiences we recommend to use the Permabond Structural Adhesive TA4605.
Step 3 - Clean surface
Step 4 - Apply the adhesive
Once the mixture is homogeneous we can apply that to the surface we previously cleaned and place carefully the other piece on top. The advantage of this adhesive is that you have time to move your pieces to their precise position, since it takes 5-10 min to start working.
Step 5 - Apply pressure
Step 6 - Recommended applications
Oh, and better try to avoid mixing materials with this or other permanent solutions to keep your materials as recyclable as possible.
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