WHAT ARE JOBO CPP2 LIFTS MADE OF?

Arklatexian · Apr 21, 2017

Yes I dropped my CPP2 lift and yes I broke a piece or two (small). I have some "Gorilla Glue" which is supposed to glue almost everything. It is the "almost" word that has me worried. The glue instructions say:"not recommended for polyethylene or polypropylene". Do any of you know if the JOBO lift for a CPP2 is made of either of these materials? Also if it is, is there any way, hopefully other than fire, that can be used to make the repairs? Now is the time for you chemists out there to show your stuff....Thanks and Regards!

AgX · Apr 22, 2017

"Not recommended for polyethylene or polypropylene" means nothing harmful. Just that the cement will not stick good to those materials and likely will chip-off at slight force.
You can test such in case of doubt with with applying the respective cement at some hidden place and test the outcome.

Cementing is not the only way to repair things. Especially things that have to bear force can be put in splints fastened by rivets. Something that can be benefitial even for things that can be cemented.

Breaking longitudinal things typically results in a "blunt" fracture, something not advisable to cement anyway.

I have a quite evolved workshop and still got nothing like "Gorilla Glue" in my stock.

Arklatexian · Apr 22, 2017

AgX said:
"Not recommended for polyethylene or polypropylene" means nothing harmful. Just that the cement will not stick good to those materials and likely will chip-off at slight force.
You can test such in case of doubt with with applying the respective cement at some hidden place and test the outcome.

Cementing is not the only way to repair things. Especially things that have to bear force can be put in splints fastened by rivets. Something that can be benefitial even for things that can be cemented.

Breaking longitudinal things typically results in a "blunt" fracture, something not advisable to cement anyway.

I have a quite evolved workshop and still got nothing like "Gorilla Glue" in my stock.

"Gorilla Glue" is a brand of what we call "super glue". I have used it in the past on ceramics and it was quite strong. Thank you for your answer, AgX. You told me what I suspected. Another "poly" plastic that it could be is polystyrene. Unfortunately the pieces that broke don't leave me with enough room to rivet but using splints could work. Viele Danke! (it is 2:00 and my Frau is asleep so I can't ask her if I spelled my "Thank You" correctly)

AgX · Apr 22, 2017

To my understanding "Super Glue" is brand of Cyanacrylate cement, whereas "Gorilla Glue" is a Poyurethane cement, a rather new type of cement at least over here.

I dislike Cyanacrylate cement and try to avoid it wherever possible. It is fine for miniscule parts where the cement has to set immediately.

Typical plastics for the mechanical parts of such machines are ABS or PC, not PS (Polystyrene).
But the plastics world is getting more and more complex by time.

bdial · Apr 22, 2017

FWIW, I believe Gorilla recently introduced a cyanoacrylate in addition to their "traditional" polyurethane, so "Gorilla Glue" could possibly refer to either.
Neither of those types are good for resisting a lot of stress, my guess is that an epoxy might work better than either.

MartinCrabtree · Apr 22, 2017

Somewhere on it may be a distinguishing mark. See this chart for details. If you cannot find the mark the manufacturer (or perhaps a seller) is the only way to be sure.

Nodda Duma · Apr 22, 2017

If possible, I would suggest using some reinforcing metal bars or wire across the crack. By bars I mean something like thicker feeler gauges laid flat across the surface. If the crack is along a corner, then bend the feeler gauge as needed. Bond those in place with liberal use of two-part epoxy. It won't look pretty but it'll be much stronger than just adhesive.

canuhead · Apr 22, 2017

would help greatly if we could see picture of the break and the pieces

Alan9940 · Apr 22, 2017

No idea what type of plastic a CPP2 lift is made of, but you may want to research something called "shoe glue." Yeah, I know it sounds funny, but I bought it from a local hobby store to repair some unknown plastic and to glue some small pieces of acrylic for a temp probe holder that I built, and it worked great all around.

Good luck!

Renato Tonelli · Apr 22, 2017

Two-part epoxy will work (as stated above). I had a crack on the on the 'basket' of a Jobo CPA and repaired it with the two-part epoxy; I also attached a 2cm strip of thin hard plastic to cover the crack. It has held very well.

mshchem · Apr 22, 2017

90 % sure it's ABS or HIPS. Both are styrenic plastics ABS (acrylonitrile butadiene styrene ) is tough stuff, HIPS (High Impact Poly Styrene) both are rubber (Butadiene) modified styrenics. These can be solvent welded with a high quality glue. You would need to do some research on what is available. When in doubt a Loctite 2 part epoxy will work. NOTHING will glue polypropylene, (This is what the caps on super glue tube are made of) WHEN IN DOUBT call Omer at CatLabs. Jobo supplied a cement for attaching the adapter plate to the CPE processor to attach the lift.
Mike

Arklatexian · Apr 23, 2017

mshchem said:
90 % sure it's ABS or HIPS. Both are styrenic plastics ABS (acrylonitrile butadiene styrene ) is tough stuff, HIPS (High Impact Poly Styrene) both are rubber (Butadiene) modified styrenics. These can be solvent welded with a high quality glue. You would need to do some research on what is available. When in doubt a Loctite 2 part epoxy will work. NOTHING will glue polypropylene, (This is what the caps on super glue tube are made of) WHEN IN DOUBT call Omer at CatLabs. Jobo supplied a cement for attaching the adapter plate to the CPE processor to attach the lift.
Mike

Wow! I was sure that you folks would come up with some ideas but from what I have read my problem now is which of these great ideas is the one to try. I am leaning toward one of the two part epoxys as I have used those for other jobs before. Thank each of you.....Regards!

ruilourosa · Apr 23, 2017

it´s made of butter....

ruilourosa · Apr 23, 2017

it´s made of butter....

AgX · Apr 23, 2017

mshchem said:
NOTHING will glue polypropylene.

Melt glue will do it.

mshchem · Apr 23, 2017

AgX said:
Melt glue will do it.

When PP is fabricated it is welded with a PP wire welder. I know that spin welding works. You need get it hot enough to fuse the PP you are set. Sonic welding too.

AgX · Apr 23, 2017

I'm not speking of welding PP, but cementing it with hot glue (hotmelt).

mshchem · Apr 23, 2017

AgX said:
I'm not speking of welding PP, but cementing it with hot glue (hotmelt).

I worked with Henkel / Loctite looking for a way to glue PP. We tried polyurethane hot melt, this is what their technical experts recommended. If you can form a mechanical "interlock" it would work. When we tried gluing PP to a variety of substrates the glue would release clean from the PP plastic part. I think that hot melt would work on Jobo lift parts, but I don't think that it's made of an olefinic plastic.
Mike

RauschenOderKorn · Apr 24, 2017

I asked the question "which glue for a broken CPE" to the Jobo service some time ago. They recommended me TANGIT by Henkel which is a speciality PVC glue.

AgX · Apr 24, 2017

Tangit is a solvent glue for non-plasticized PVC.
There is also version for ABS.

RauschenOderKorn · Apr 24, 2017

AgX said:
There is also version for ABS.

Well, the recommendation came with a "You can find it at your local hardware store" and the only Henkel Tangit all my local hardware stores carry is Tangit PVC-U glue.

WHAT ARE JOBO CPP2 LIFTS MADE OF?

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