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Unread 02-06-2013, 10:12 PM
Ian Curtis Ian Curtis is offline
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Bonding polycarbonate to polycarbonate

Hi everyone,

Does anyone have experience bonding polycarbonate to itself? I have tried thick CA (superglue) and this stuff called SCIGRIP 16 which I was told was recommended by the guy at the counter at TAP Plastics. The thick CA is pretty lousy, and the SCIGRIP 16 works alright, but I was wondering if anyone could recommend a better option...

Thanks!
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Unread 02-06-2013, 10:15 PM
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Re: Bonding polycarbonate to polycarbonate

As it would turn out, loctite sells a polycarb adhesive readily available at a local Walmart. I'll get the exact name tomorrow when I have the tube in hand. Works great, dries in five minutes, sets in an hour and cures over night.
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Unread 02-06-2013, 10:23 PM
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Re: Bonding polycarbonate to polycarbonate

Is it this stuff:
http://www.loctiteproducts.com/p/13/...tic-Bonder.htm

I'm interested as well and didn't know they made a product that could work.
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Unread 02-06-2013, 10:43 PM
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Re: Bonding polycarbonate to polycarbonate

Might want to try to get in contact with someone from 1714 MORE robotics. They make their entire robot out of the stuff.
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Unread 02-06-2013, 10:50 PM
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Re: Bonding polycarbonate to polycarbonate

Ian, I've used this stuff for projects at home as well as the Loctite one, both work exceptionally well. Both this and the Loctite require the applicator gun.

http://www.walmart.com/ip/Devcon-Pla...er-ii/15632453

Use: http://www.youtube.com/watch?v=AHMykiX_YEQ
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Unread 02-06-2013, 11:04 PM
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Re: Bonding polycarbonate to polycarbonate

Yeah, I think it was the epoxy plastic bonder. I didn't know that an applicator gun was necessary. Our team usually just squeezes our epoxy out onto a plate and use a spoon or fork or pop-sicle stick to mix the stuff. I think the plastic bonder actually came with an applicator stick though.
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Unread 02-06-2013, 11:24 PM
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Re: Bonding polycarbonate to polycarbonate

Quote:
Originally Posted by Akash Rastogi View Post
Ian, I've used this stuff for projects at home as well as the Loctite one, both work exceptionally well. Both this and the Loctite require the applicator gun.

http://www.walmart.com/ip/Devcon-Pla...er-ii/15632453

Use: http://www.youtube.com/watch?v=AHMykiX_YEQ
That mixer gun is genius. Having taught many people to use epoxy, I've had plenty of people tell me that "that stuff is garbage! doesn't stick at all!"

Does it dry fairly clear? Being a see-through structure I have been fretting over how to make the joints not look like garbage. I've asked Pinecone as well, will report back what he recommends being from the land of plastic.
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Unread 02-07-2013, 12:18 AM
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Re: Bonding polycarbonate to polycarbonate

Another option is to heat the sheet with an acetylene torch and bend it on a vice. My team used this method on our robot last year for one of our components. Although this only really works for certain applications. If you don't need absolute precision, then this is a great way to go.
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Re: Bonding polycarbonate to polycarbonate

The Loctite plastic bonder doesn't work well for polycarbonate sheets in my experience.

You want Methylene Chloride. It can be expensive, but you don't need a lot to make the bond. You will need a syringe to put drops of material along the surfaces to bond.

http://www.ehow.com/how_5686551_glue...ate-sheet.html
http://www.ehow.com/how_6635889_glue-lexan.html



http://www.mcmaster.com/#catalog/119/2120/=ldfxxn would need some additional chemicals added to the mix to make it easier to work with.

I've had experience with Weld-On #3 such as this: http://www.eplastics.com/Lexan_Polycarbonate_Glue

Last edited by protoserge : 02-07-2013 at 06:48 AM.
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Unread 02-07-2013, 06:22 AM
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Re: Bonding polycarbonate to polycarbonate

A lot of very good information about using polycarbonate can be found here: http://www.curbellplastics.com/techn...e-makrolon.pdf

They have all sorts of information about bending, heating, forming, gluing, melting, folding, spindling, mutilating, and abusing polycarb.
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Unread 02-07-2013, 06:28 AM
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Re: Bonding polycarbonate to polycarbonate

Quote:
Originally Posted by stinglikeabee View Post
The Loctite plastic bonder doesn't work well for polycarbonate sheets in my experience.

You want Methylene Chloride. It can be expensive, but you don't need a lot to make the bond. You will need a syringe to put drops of material along the surfaces to bond.

http://www.ehow.com/how_5686551_glue...ate-sheet.html
http://www.ehow.com/how_6635889_glue-lexan.html



http://www.mcmaster.com/#catalog/119/2120/=ldfxxn would need some additional chemicals added to the mix to make it easier to work with.

I've had experience with Weld-On such as this: http://www.eplastics.com/Lexan_Polycarbonate_Glue
Methyl chloride works great, but it's really nasty stuff. I wouldn't reccomend using it without proper ventilation and personal protestive equipment, such as a respirator. Read up on exposure to it before considering using it.
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Unread 02-07-2013, 07:59 AM
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Re: Bonding polycarbonate to polycarbonate

I would also second methyl ethyl ketone/Methyl chloride.
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Unread 02-07-2013, 10:41 AM
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Re: Bonding polycarbonate to polycarbonate

I would strongly suggest reconsidering MEK and Methylene Chloride unless you have a really well ventilated area to work in and respirators to use.

http://www.sciencelab.com/msds.php?m...8&code=SLM2677
http://www.sciencelab.com/msds.php?msdsId=9927358

I have actually worked with both and found that I was especially sensitive to the vapors from each (ie - above the norm). You may want to look at a clear urethane adhesive or something similar.

Of course, I have to ask... for what purpose are you adhering these two parts together? Is there an opportunity to use a mechanical fastening instead?
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Unread 02-07-2013, 11:58 AM
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Re: Bonding polycarbonate to polycarbonate

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Originally Posted by DELurker View Post
Of course, I have to ask... for what purpose are you adhering these two parts together? Is there an opportunity to use a mechanical fastening instead?
It is a thin wall tabbed construction hopper that I intended to make out of plywood (which I know how to glue!) -- but the team wanted to make it clear for polycarb for looks. I could add larger tabs and put in some brackets, but I would rather not (mostly for looks). If adhesion turns out to be really difficult, I will probably end up doing that.
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Unread 02-07-2013, 02:43 PM
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Re: Bonding polycarbonate to polycarbonate

Try using rivets and polycarb/alum angle. If it's thin enough you can bend it with a press brake.

High bond double back tape will also work.
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