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AcesFull
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Polypropylene Adhesive

11/09/2007 9:34 AM

I need to "glue" some 30% glass filled polypropylene parts together, is there a good off the shelf adhesive that is available? Thank you.
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snewkirk
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#1

Re: Polypropylene adhesive

11/09/2007 10:22 AM

the old standard used to be 3M EC2216. There may be some better ones out there now a days. During the 70's and 80's it was the only adhesive that was approved by the FAA. I ususally use the gray but that depends on your application.

PDF datasheet

Good luck,

Scooter

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#6
In reply to #1

Re: Polypropylene adhesive

11/10/2007 7:48 PM

Is the "old standard" just MEK?

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PWSlack
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#7
In reply to #6

Re: Polypropylene adhesive

11/12/2007 3:48 AM

Er, MEK won't work. Polypropylene doesn't dissolve in it.

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snewkirk
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#10
In reply to #6

Re: Polypropylene adhesive

11/12/2007 11:50 AM

the "old standard" used to be "3M EC2216"

this is a 2 part epoxy.

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user-deleted-1105
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#2

Re: Polypropylene Adhesive

11/09/2007 12:09 PM

Excuse my curiosity (hey ...I'm a cat!) but glassfilled polyprop' seems slightly unusual to me ...what's the appliction? Is it chemical resistance you need?

Del

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AcesFull
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#3
In reply to #2

Re: Polypropylene Adhesive

11/09/2007 12:33 PM

The reason we use the glass filled is for strength. The polypro itself has the chemical compatibility we desire.
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#4
In reply to #3

Re: Polypropylene Adhesive

11/09/2007 12:36 PM

Ok...yup that's what I wondered...we have a few bits made in polyprop' for that reason...just curious.

Cheers

Del

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dayhead
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#5

Re: Polypropylene Adhesive

11/10/2007 3:44 AM

I was under the impression that glue bottles are made of polypropylene because nothing will stick to it.
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PWSlack
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#8
In reply to #5

Re: Polypropylene Adhesive

11/12/2007 3:49 AM

....not even cyanoacrylate!

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PWSlack
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#9

Re: Polypropylene Adhesive

11/12/2007 3:50 AM

Is it possible to fusion-weld the parts together using heat?

How about ultrasonic welding?

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snewkirk
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#11
In reply to #9

Re: Polypropylene Adhesive

11/12/2007 11:57 AM

ultra sonic welding works, I don't know about the fusion weld.

It seems to me that there was a surface prep that was used to bond with epoxy, I think it was an acid etch of some kind. It discolored the plastic before bonding. There was also a process that used a solvent to soften up the surface before bonding (it was called "activating" the surface). Its been too long since I did this and the memory isn't what it used to be...

I would contact the adhesive manufacturers and ask them.

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dayhead
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#12

Re: Polypropylene Adhesive

01/01/2008 2:08 AM

Any you guys remember the Hobie Hawk R/C glider from back in the '70's?

The fuselage used a front section made of either polypropylene or polyethyelene

Anyway the manual advised "flame treating" this part of the fuselage so that it would take paint. I used too much "flame treating" and warped mine. It still flew well, though.

In the meanwhile I need to glue polypropylene to expanded polystyrene foam.

Any suggestions?
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snewkirk
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#13
In reply to #12

Re: Polypropylene Adhesive

01/07/2008 1:44 PM

Well the heat trick works pretty well but you must keep control of your heat source .

The 3M EC-2216 works pretty good under these conditions and will work great with the polystryene foam.

How big of an area do you need to glue? I use 2216 all the time to glue the sides on profile fuselages and I've used it to skin wings.

Scott

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AcesFull (1); agua_doc (1); dayhead (2); PWSlack (3); snewkirk (4); user-deleted-1105 (2)

Previous in Forum: Halogen Lamp Gas - Mathematical Coefficients   Next in Forum: What Happens to Water in a Vacuum?
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