glueing PP to PE
glueing PP to PE
(OP)
Hello there!
I have a question and I found a similar question before, but not exactly answering my question. So, I'm hoping you guys can help me.
I want to glue a PE-bag to a PP surface. [I choose to use a PE-bag because it is more flexible than a PP-bag? (correct me if I'm wrong)]
I think it needs to be delicate, because I want to fill the PE bag with a liquid - it is for medical purposes.
Is there a way to do so?
I found something about using hot air plastic welding, but how precise and delicate is this?
I hope you guys can help me out,
Best Regards,
Jay
I have a question and I found a similar question before, but not exactly answering my question. So, I'm hoping you guys can help me.
I want to glue a PE-bag to a PP surface. [I choose to use a PE-bag because it is more flexible than a PP-bag? (correct me if I'm wrong)]
I think it needs to be delicate, because I want to fill the PE bag with a liquid - it is for medical purposes.
Is there a way to do so?
I found something about using hot air plastic welding, but how precise and delicate is this?
I hope you guys can help me out,
Best Regards,
Jay






RE: glueing PP to PE
RE: glueing PP to PE
There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell
RE: glueing PP to PE
If both were PE it would be easier as you could use different melting point PEs, with the lower melting point being the thicker material.
This approach could work with PP or PE, but you will have a wider choice of material properties to work with in PE. I would contact both PP and PE suppliers who supply to the bag industry for detailed advice.
3M make some excellent double sided tape type adhesives that glue very well to PE and to PP.
Regards
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RE: glueing PP to PE
There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell
RE: glueing PP to PE
RE: glueing PP to PE
Well, I can't give too much details, as no patent has been applied for yet.
This is as much I can give:
- intended to be a disposable product
- the bag should have a certain strength and flexibility, but must also easily be punctured (cannot give more detail about this)
- use for inside the body
It is still vague, my apologies.
Jay
RE: glueing PP to PE
thank you in advance
Cheers,
Jay
RE: glueing PP to PE
Also, it is easier to weld multilayer films where one surface is a tacky low temp easy to weld film and the other is a stronger higher temp film that won't melt at the welding temps of the weldable surface.
Ie if you get a nylon/polyethylene co-extruded film and weld PR to PR sides together by applying heat to the nylon sides, welding is real easy even with very thin films.
Can you get a PET/PE co-extruded film.
Even if it's PE, use metalacine PE one side (welds at maybe 80 deg C) and MDPE on the other (melts at maybe 120 deg C)
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.