Sticky Magnets?

[+Captain Gore-tex]

I've been trying to attach some magnets to some plastic containers and failing. Once the glue dries the magnet comes off due to the flexing of the containers (breath strips and film canisters).

I've been trying araldite.

Can anyone suggest the correct glue to use please?

[+Mad H@ter]

try putting glue in side the container with the magnet

[+Dorsetgal & GeoDog]

I have seen a number of containers recently with earth magnets taped on, seems effective.

[+2202]

Put the magnet inside after roughing up the plastic with wire wool or similar.

Let the araldite set solid (overnight?) before placing.

[+maxkim]

Maplin do some fixed on a metal cup with a stiff wire on them These are good and can be soldered or twisted into place.

[+The Wombles]

Put the magnet inside after roughing up the plastic with wire wool or similar.

Let the araldite set solid (overnight?) before placing.

 

Snap I use this technique. The magnets can come adrift it the surface isn't rough enough for the glue to get hold but Bruce you've found several of these which have lasted years already.

[+Just Roger]

I have found that sticking the magnet to a disc of card with epoxy (araldite for example) and then sticking the card to the, roughened, box with Silicone sealant is quite effective.

[+Chaotica_UK]

Bruce, the Corporals 'Hotwells Reincarnated' (which I found today) works fine with the false bottom and the magnet underneath, did you glue that? If so what did you/he use and where did the plastic disk come from - it looked very professional.

 

Im actually going to modify my magnetic micros to the same, currently they are taped in without a problem, however age will affect the strength of the tape.

[markandlynn]

I score the inside base of the container with a sharp pointy knife.

Put some no more nails into the base.

Drop the magnet into the container.

Put container on metal overnight to hold it down.

Works atreat for all of ours as no more nails has some flexibility.

[+Captain Gore-tex]

Bruce, the Corporals 'Hotwells Reincarnated' (which I found today) works fine with the false bottom and the magnet underneath, did you glue that? If so what did you/he use and where did the plastic disk come from - it looked very professional.

 

Im actually going to modify my magnetic micros to the same, currently they are taped in without a problem, however age will affect the strength of the tape.

 

All I did was put a magnet in the bottom with some bluetac to hold it in place then used a scalpel to cut the lid down off another film container and pushed it down over: all sealed in with no chance of it falling out and the inside of the cache is really neat.

 

I've just retried the breath strip containers but using some sandpaper to roughen the surface, will let you know how it goes.

[+purple_pineapple]

i've tried most of the methods here (aruldite and no more nails, inside and out) and found I couldn;t get the magnet to stick (and yes, all roughed up as well...)

 

so my method is black duck tape holding the magnet to the side or base (depending on where i wan to place it...). All these are so far in good nick (aprt from some waterlogging, but thats another issue!)

 

HTH

 

Dave

[+PopUpPirate]

Nothing sticks to polypropylene, because of its oiliness, but PVC aint too bad.

[+Rebel Alliance]

I roughen the container and then use hot glue.

I do recommend placing the glue & magnet inside the container.

Also place the container on a ferrous metal (Iron or some steels) pop on the glue and then the magnet.

The magnetic pull towards the metal will aid the adhesion process []

[+sTeamTraen]

Nothing sticks to polypropylene, because of its oiliness, but PVC aint too bad.

 

No glue which I've ever seen sticks to polyethylene either... but as purple_pineapple said, duct tape seems to do it OK.

 

Epoxy resin flooded around the magnet seems to work OK to keep a magnet in the bottom of the inside of a 35mm film canister.

 

Alternatively, use a steel cache container and stick it to a steel structure. That way, who cares if the magnet sticks to the structure or the container when you take it off to log?

[+Windsocker]

I use a product called "Gripfill" from the local builders yard, its stong enough to bond concrete takes about 24hrs to set but thats it you'll need a kango to prise it off after that

[+Captain Gore-tex]

Thanks windsockers, can you post some manufacturer details so I can find their WWW

[+Skate and Jane]

Gripfill is the same as no more nails.

As has been said, there is no glue that works on polypropylene.

Some will stick for a short while but will fail eventually.

Tape is the best bet.

Edited November 30, 2006 by Skate and Jane

[+Pharisee]

I scrounged a load of old U/S computer hard disk drives and dismantled them. The have at least one and sometimes two very powerful magnets in them that are bonded to a nickel plated steel back-plate. The back plate usually has a couple of screw holes in (but can be drilled if it hasn't) and I've used a couple of small screws and nuts to secure them on the outside of the bottom of a 'lock and lock' type box. I also coated both mating surfaces with silicone sealant just to make sure water doesn't get in through the screw hole. This has proved to be very effective and has been in the field for some time now without problems.

[+John Stead]

I scrounged a load of old U/S computer hard disk drives and dismantled them. The have at least one and sometimes two very powerful magnets in them that are bonded to a nickel plated steel back-plate. The back plate usually has a couple of screw holes in (but can be drilled if it hasn't) and I've used a couple of small screws and nuts to secure them on the outside of the bottom of a 'lock and lock' type box. I also coated both mating surfaces with silicone sealant just to make sure water doesn't get in through the screw hole. This has proved to be very effective and has been in the field for some time now without problems.

 

I fantasised that John was about to tell us how he secured the magnet to his new micro!!!

[+Pharisee]

I fantasised that John was about to tell us how he secured the magnet to his new micro!!!

You're too old to be having fantasies, John and anyway.... why would I hide a new 'micro' when I can use a full size ammo can?

[+Boneychest & Catsuey]

DP8005 polyolefin adhesive from 3M

 

From Farnell-in-one (or Buck & Hickman) or RS (account needed)

 

Here's how it works

[markandlynn]

Sorry when i said no more nails i actually meant marine adhesive avaialbel from here

http://www.mailspeedmarine.com/ProductDeta...roductID/102797

It sets in the prescence of moisture and can only be removed mechanically.

Of course id recomend you have a second use for it at that price I used it to fasten parts onto our kit car its safe up to about 150 mph

[+Skate and Jane]

I stand corrected. Might be a bit expensive for a few micros but good to know it's out there. Thanks for the info.

[+JohnTee]

Have you tried Gorilla Glue? It's available in the states and might be worth looking for in the UK.

 

http://www.gorillaglue.com/

 

JohnTee

[Vanya1]

I use a product called "Gripfill" from the local builders yard, its stong enough to bond concrete takes about 24hrs to set but thats it you'll need a kango to prise it off after that

 

Thanks for that. I need some as our magnet fell of after a week

[+sTeamTraen]

I found a magnetic 35mm canister today which used no glue at all. The magnet goes in the bottom of the container, and the rolled-up log keeps it in place. Half a hard disk magnet will hold something that small in place firmly, even through the bottom of the container. I'll try that for my next magnetic micro.

[+currykev]

I found a magnetic 35mm canister today which used no glue at all. The magnet goes in the bottom of the container, and the rolled-up log keeps it in place. Half a hard disk magnet will hold something that small in place firmly, even through the bottom of the container. I'll try that for my next magnetic micro.

 

Ahhh, a fellow micro enthusiast!

We're a minority in these parts!

[+Pharisee]

I found a magnetic 35mm canister today which used no glue at all. The magnet goes in the bottom of the container, and the rolled-up log keeps it in place. Half a hard disk magnet will hold something that small in place firmly, even through the bottom of the container. I'll try that for my next magnetic micro.

 

Ahhh, a fellow micro enthusiast!

We're a minority in these parts!

 

And long may it remain so..........