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Glueing Plastic

mrtone

Well-known member
Joined
Apr 11, 2006
Messages
47
Location
Waynesboro, VA
What works best for glueing hard plastics together? The hinges on my laptop PC are cracking the cover and I need to reinforce the area.
 
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pgreen

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Joined
Jun 3, 2006
Messages
181
Location
Venus, TX
If it's just a crack and it still fits tight, cyanoacrylate adhesives work great (super-glue). If you are wanting to reinforce it with another layer or something, JB weld or another 5-minute type epoxy will work well. If the epoxy seems too thick, SLIGHTLY warm it up with a heat gun or hair dryer, and it will thin out significantly and flow into the nooks and crannies much better.

Phil
 
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mrtone

Well-known member
Joined
Apr 11, 2006
Messages
47
Location
Waynesboro, VA
Sure don't want to experiment too much, even though I dont use it for work/travel anymore I dont want it looking like a butchered-up job. I've put off fixing it because of that but now I've got to do something or its gonna be history if the top separates entirely.
I'm not too sure about JB, its great stuff but I'm thinking its too thick. Then again, I've never tried heating it.
I definitely need to put other pieces of plastic over the cracks for reinforcement.
 

CraigFL

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Joined
Nov 1, 2005
Messages
704
Location
Panama City, FL
I find that I can glue a lot of plastics with a mixture of Super Glue and baking soda. You need to make a puddle of super glue (watery kind - not gel!) and sprinkle the baking soda into it. As soon as the baking soda hits the glue it becomes instantly hard. If the plastic is real shiny or hard, roughing up the surface first with some sandpaper helps.
 
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jeffm2009

New member
Joined
May 11, 2009
Messages
1
I would recommend a cyanoacrylate adhesive too, something like Crazy Glue should do the trick. I've never heard of the baking soda method but it seems like it's worth a shot too if just regular CA doesn't seem to be enough.
 

rocketman

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Joined
Jul 16, 2008
Messages
263
Location
Chicagoland
If you have already removed the hinge bezel and tightened the hinge screws there isn't much you can do outside of replacing the covers. They generally can be had on eBay cheaper than you might think. The area where the hinges are have the razor-thin display and power cables and damage very easily. Don't be pumping in JB Weld and be careful with CA glues as well as they can damage the coating on many components.

Repaired laptops for 15 years before moving up the IT food chain.
 

Stuey

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Joined
Jan 8, 2008
Messages
11,034
Location
28m above sea level
The first thing you should do is figure out what exactly happened. At first I thought the same of my laptop, but it turns out that the hinge has broken, and nothing I tried (epoxy and gorilla glue) was able to reconnect the two metal pieces.

Also, find out the type of plastic. It's possibly polycarbonate. I use IPS Weld-On. Essentially, what it does is dissolve two sides of a joint and then permit the reformation and intertwining of both sides. The resulting bond is stronger than the host material. BUT you must use the correct adhesive to that plastic to create such a bond.

Edit: Damnit!! Look at the thread dates! The damn glue-peddling spammer (jeff) brought this thread back from the dead only to serve us some spam.
 
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