Glue for Raise3D PLA?

Thoughts about Raise3D, 3D printing and making in general.
Ari
Posts: 24
Joined: Fri Dec 23, 2016 3:18 pm

Glue for Raise3D PLA?

Postby Ari » Wed May 30, 2018 3:02 pm

Has anyone on the forum had experience of gluing together parts printed from Raise3D PLA (standard or premium)?

I have tried Loctite superglue ( Ethyl 2 cyanoacrylate) but the bond is easily broken/ I am looking more for something where if forced, the PLA will give way before the glue bond.

The particular parts I need to bond now are in red PLA (standard), but it would useful to know if there is a suitable glue compatible with any of the available colours.

Jetguy
Posts: 2697
Joined: Tue Mar 22, 2016 1:40 am
Location: In a van, down by the river

Re: Glue for Raise3D PLA?

Postby Jetguy » Wed May 30, 2018 3:34 pm

Since PLA is known for chemical resistance, relative immunity to most solvents, there in lies part of the issue. If you do get a proper solvent glue, just on basic 1000 foot observations and no chemistry, I'm thinking that solvent is probably hazardous. That said, a quick search yielded this old thread https://groups.google.com/forum/#!topic ... XZ5HyqOa6I

Hey All,

I was under the impression that there was no solvents for PLA. I just happened to try some solvent cement that is made for welding/bonding Acrylic and it works great. I successfully glues up two pieces and also was easily able to make a slurry similar to what you would get with acetone/abs together. Pretty exciting, thought I'd pass it along.

These are the products that I used. Both are the same solvent but different viscosities.

http://www.amazon.com/gp/product/B0096T ... UTF8&psc=1
http://www.amazon.com/gp/product/B0096T ... UTF8&psc=1

Enjoy!


Now, further down in that topic, my suspicions are exposed.
Here's a link to the technical specs: http://es.ipscorp.com/assembly/acrylic

The solvent is methylene chloride, aka dichloromethane. The more viscous versions contain some acrylic monomer.

I used to use the similar ethylene dichloride on acrylic. It works really well. If it works as well on PLA, we're golden. As long as you take proper precautions.


This only just came up the local news this week http://www.live5news.com/story/38297794 ... leston-man
The Natural Resources Defense Council says home improvement store chain Lowes has decided to start pulling deadly paint strippers made with methylene chloride from the shelves.


I HIGHLY suggest you use minimally proper ventilation and read all safety precautions. Consider using only outdoors, out of reach, far away where anyone else can be exposed.

detroitus
Posts: 74
Joined: Fri Mar 02, 2018 5:40 pm

Re: Glue for Raise3D PLA?

Postby detroitus » Wed May 30, 2018 8:29 pm

I've been using Loctite 414 and it's worked pretty well. Although I haven't really done much plastic-plastic bonding, it works really well for bonding PLA to metals.

Ari
Posts: 24
Joined: Fri Dec 23, 2016 3:18 pm

Re: Glue for Raise3D PLA?

Postby Ari » Fri Jun 01, 2018 6:51 am

@Jetguy and detroitus

Thank you both for your quick responses and the useful links Jetguy. These gives me a good starting point.

I am fortunate in that I have access to a fume cupboard and associated PPE if required. So I think some experimentation is needed. I will also give the Loctite 414 a go.

Regards.

Jigsawman
Posts: 2
Joined: Sun Dec 03, 2017 5:46 pm

Re: Glue for Raise3D PLA?

Postby Jigsawman » Wed Jun 06, 2018 5:23 am

FYI, when I paint PLA, I spray it with Bulldog adhesion promoter. With two thin coats it makes the PLA extremely tacky for about 30-45 minutes. I would be willing to bet that buying that in can form instead of spray form (can be purchased at a local auto paint and body supply store), that you could use it as a glue as long as you can clamp the pieces together.
JSM

Evan
Posts: 113
Joined: Mon Mar 21, 2016 3:07 pm

Re: Glue for Raise3D PLA?

Postby Evan » Thu Jun 14, 2018 4:15 pm

I know MEK works well, but it's no longer legal in the state of California and rightfully so. Also Heptane is a good primer that will aid in bond strength when used with super glue.

Iamkar33m
Posts: 83
Joined: Fri Dec 01, 2017 2:53 pm

Re: Glue for Raise3D PLA?

Postby Iamkar33m » Fri Jun 15, 2018 6:52 pm

I use DAP RapidFuse glue: http://www.dap.com/dap-products-ph/rapi ... -adhesive/

I found that it bonds to all PLA I've used and even my PETG's. I tried to pull a glued piece apart and the plastic layers gave way before the glue bond did.

It's composed of Ethyl Cyanoacrylate and Dimethyl Sebacate, and I believe it's the Dimethyl Sebacate that helps the cyanoacrylate bond to PLA plastic as other superglues I've tried don't seem to work as well.

Best,
Kareem


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