PVC pipe bonding with PE (polyethylene)

[Bearpanda]

Hello,
I have to stick a PVC pipe with an apparently black PE piece (unless it is Polypropylene - PPP?).
PVC glue does not stick to PE. I tried with bicomponent glue two-component (type repair express of Pattex). It doesn't hold either. (I have 4 bars of pressure in the circuit)

Anyone know of a glue capable of sticking to both PE (or PPP) and PVC?

[alaniesse]

You must have spare parts, with clamping or threading, so as to stick only one side with the appropriate glue and on the other side a mechanical assembly by clamping.

[elephant]

I don't see any other solution either.

Optionally, O-ring

[gegyx]

For the curious:

It should weld.

If you can put your part in a rotating machine and rotate it on your pipe, the heating should melt the 2 materials.

You have to stop at the right time.

[dedeleco]

A beginning of answer:

http://www.bricolagepro.net/58/Infos_produits.html

http://www.linternaute.com/bricolage/fo ... lyethylene

http://forums.futura-sciences.com/chimi ... ylene.html

http://www.toutcoller.com/coller-plasti ... ylene.html

it all depends on the stresses that the bonding will undergo:

an epoxy put on polyethylene made very rough with a rasp can hold thanks to the interstices left by the rasp where the epoxy gets stuck, if the efforts are not excessive.

Otherwise you need the right primer with the right cyanoacrylate, because you have to chemically modify the surface of the polyethylene, which is very difficult, because it resists almost all harsh chemicals, even hydrofluoric acid !!
But hot there must be products that attack it and graft on to something else.

See as well :
http://www.expemag.com/technique/coller ... ylene.html

http://www.expemag.com/voyage/viewsujet.php?id=5063

[Obamot]

Like Dedeleco, epoxy resin. But beware, not just any.

Otherwise it's the catamaran. The 3M two components (05900 2k), often used in bodywork with possibly fiberglass to stiffen (sold separately)



Glue almost all plastic (PP, EP, TPO, PP / EPDM, PC, PUR) except ABS. It is necessary to make tests on the two parts in places "not damage", before applying it to the intended place!

Because it has a plastic primary spray for adhesion (sold separately, essential, to put after sanding a hanging area)

But it is expensive. Approx. 65.96 € TTC without the spray the two tubes (it lasts a long time, even several years after the deadline if we never mixed the caps!)
http://www.pourvotreauto.com/web/pourvo ... gart=V0277

Safety sheet (mask and gloves, do not inhale):
http://www.pourvotreauto.com/resources/ ... 300002.pdf

Assembling two plastics of different chemical formula is not to be done (except possibly with this glue if it adheres perfectly to the two parts). I even find it hard to imagine that we could think of doing this! And 4 bar of pressure is enormous. So I wouldn't do it ...
Welding is the only way out, it seems to me. If the manufacturers say that it can be done without problem (a phone call is so easy).

Otherwise the O-ring, but you need the hardware that goes with it to tighten ...

And I suppose a fluid will pass through this pipe?

[Obamot]

Attention:
Temp. PE melting point = 140 ° C
temp. of PVC melting> 180 ° C

Last news, 3M glue would also stick the ABS (but I do not see the PVC, which seems to me to be a little "greasy" plastic to the touch). Now 3M says "all":

3M 05900/05901 are two component epoxy materials designed to repair all types of plastic parts: PP, EP, TPO, PP / EPDM, PC, PUR, ABS, etc.

Here are the resistance values:
Polypropylene (PP) + 3M primer 05917 2.1 MPa
Polypropylene (PP) 1.3 MPa
ABS 4.0 MPa
Polycarbonate (PC) 4.0 MPa
Polyester 1.3 MPa

From this 3M PDF in English:
https://www.econologie.com/fichiers/partager3/1339386739uR5563.pdf

[dedeleco]

With 4 Bars, this will not hold, especially with the expansion function of T, and therefore put cost collars to tighten the total with bonding, or use the usual commercial junctions on PE which tighten the PE strongly with joints, if the PVC has the right diameter.

[Bearpanda]

Thank you all for your quick reactions.
I will try one of the tracks of dedeleco and Obamot. (Epoxy resin, Repar-ex).

[aerialcastor]

Hello,


Forget the glue, it won't hold. There is nothing that fits on the PE (apart from the cyanoacrylate glue and again).
Then anyway I imagine it is the supply of drinking water. I doubt that the expoxy resin is very good for health.

In fact the solution is very simple

Generally, different materials are never assembled by welding, brazing or gluing. All simply because they do not react the same way to mechanical forces. And it breaks at the link.