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GRFagan 01-11-2012 10:29 AM

Help with Glue
 
What is an appropriate glue to glue two small plastic pieces together. The AC adapter on my colleague's document camera broke. From past experience I've found that Super glue and it's ilk do not work well. Does Gorilla glue work well in this type of application? I am just worried about the stress it takes with the plug being pulled in and out all the time. The piece itself is soldered onto a board and cannot be easily replaced. Thanks for the help.

joed 01-11-2012 11:05 AM

Every type of plastic takes a very specific glue suited only to that plastic. Many of them are not actually glue but a slovent that disloves the plastic and welds the two pieces together.

Ironlight 01-11-2012 11:23 AM

joed is spot on. It may take some trial and error to find the right product. In my experience super glue is great on some types of plastic and useless on other types, particularly parts with small surface area and stress on them.

I would actually start by trying a two-part epoxy formulated for plastic which seems to work on the broadest range of plastic. If this is a functional fix and not an aesthetic one, consider reinforcing the join between the broken parts with additional material if the join is going to be under any sort of stress.

GRFagan 01-11-2012 12:38 PM

Joed, can you suggest a type that might be appropriate?

EvilNCarnate 01-11-2012 03:31 PM

My wife has a glue sold at hobby lobby (craft store) that is amazing, dont know the name but I would check a craft store. In my personal experience when it comes to plastic I always say epoxy, not glue. Glue soaks into pores and hardens, epoxy's are typically 2 part solutions. In fact I know Super Glue, the brand, makes one just for plastic. As for gorilla glue, my first lesson with gorilla glue was that it expands. I found that its great for 2 pieces that interlock loosely and you need to glue them together tight, not for pieces that the bond is broken and you want to repair it. Gorilla glue will expand and push the pieces apart before it hardens.

joed 01-11-2012 06:27 PM

Hot glue. That stuff sticks to almost everything or Duct tape

SPS-1 01-11-2012 08:45 PM

Whatever you use, first roughen up the surface with some sandpaper. It will give the adhesive something to "bite" into. I have had succcess with PL Premium adhesive caulking on plastic. That is a polyurethane adhesive, somewhat similar to Gorilla glue, but it has more mechanical stiffness, if you can put in on very thick.

user1007 01-12-2012 11:46 AM

SuperGlues were never really designed for plastics. Guerilla Glue and Guerilla Tape are gifts from God. Not really for plastics though.

Plastic store may help.

Just a silly suggestion though before you run off and spend a fortune on fixes? I wanted an extra AC adapter for a device of mine. Brand new, $5 including shipping, on eBay and delivered just last week. I don't think I could be any glue or figure out a fix with it for that kind of chimp change.

The converter tip systems sold at Radio Shack and other places may be an option also. Just switch the tips to charge near anything. Higher end systems allow for switching the voltage output also. One AC adapter (or cigarette lighter version). Just switch tips if you want to use it for other devices. I think they are like $20 to get started? The tips are not overly expensive.

When in doubt? X-Acto and duct tape to get you by. Everybody should own a glue gun though. I cannot see using it and the melted stuff to hold an AC convertor together for long without tape. Like I say, I fear you are approaching $30 in rescuing/repairing a device that may only cost you $5. And how did this thing fracture in the first place? Might not be rescuable and may soon be a repaired fire hazzard?

noquacks 01-13-2012 07:40 PM

Quote:

Originally Posted by GRFagan (Post 819319)
What is an appropriate glue to glue two small plastic pieces together. The AC adapter on my colleague's document camera broke. From past experience I've found that Super glue and it's ilk do not work well. Does Gorilla glue work well in this type of application? I am just worried about the stress it takes with the plug being pulled in and out all the time. The piece itself is soldered onto a board and cannot be easily replaced. Thanks for the help.

What kind of plastic is it? There are so many. Polyethylene or polypropylene- no "glue" will really fuse them together. Epoxy (2 part) is best bet. Now, if the plastics are styrenes/vinyls/etc these can be fused/"glued" with good results. Without knowing, epoxy is best choice. Part of the reason lastics are so "indestructible' is the fact that they inherently do not react with nature, also glues.....

user1007 01-14-2012 06:13 AM

I am sorry but this thread is insane. You do not glue together a power adapter. It is irrelevant what plastic is involved. Go to eBay and get a new one.

AndyGump 01-14-2012 10:08 AM

sdsester, why do you spell Gorilla glue as "Guerilla"?

I am just curious if you meant to or was it some kind of Freudian slip?

Andy.

user1007 01-14-2012 12:31 PM

Quote:

Originally Posted by AndyGump (Post 822186)
sdsester, why do you spell Gorilla glue as "Guerilla"?

I am just curious if you meant to or was it some kind of Freudian slip?

Andy.

Freud never really slipped. I do therapy every Wednesday. Most people scatter knowing I am nearing. Entire blocks of Chicago for my 45 minute session clear when I sit down with my guy. To talk about stuff. Andy, are you sure you want to mess with me or be added to my list? Are you the guy I should talk about next.

Tell me Andy, how would you propose the spell Argangtain?

AndyGump 01-14-2012 12:41 PM

Ah, I see now that it was not so much a Freudian slip as it was a Jungian Blouse.

Ha ha.

I feel safe in the knowledge that you are in Chicago and I am in California.

Andy.

user1007 01-14-2012 12:52 PM

Quote:

Originally Posted by AndyGump (Post 822361)
Ah, I see now that it was not so much a Freudian slip as it was a Jungian Blouse.

Ha ha.

I feel safe in the knowledge that you are in Chicago and I am in California.

Andy.

Lived in Northern for California for near three decades. Raced sailboats around the SF Bay and up and down the California and extended West Coast. Once did the insane race all the way to Hawaii. Took us two days as I remember.

No responsible Californian fails to realize it is just a matter of time before, and I hope near within minutes Florida, both fall into the depths. Nothing much missed in either case. As your kids climb for shore, in Nevada. You are going to be begging for safe Lake Michigan area property.

And it snows here, try splaining that to your Orange County kids,

titanoman 01-14-2012 12:56 PM

Quote:

Originally Posted by sdsester
Lived in Northern for California for near three decades. Raced sailboats around the SF Bay and up and down the California Coast. Once did the insane race all the way to Hawaii. Took us two days as I remember.

So did I.
(except it was an off-shore cigarette with twin blown 572's)
But things have changed a lot in a short time over there.


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