Perspex adhesive

MikeT · Unread post by **MikeT** » 09 May 2010, 15:11

My Diaxia (hybrid Diag2000) screen is a tad dim in normal daylight and trying to read the screen is proving problematic in sunlight.

It's made worse by the fact there's two layers of screen protection that are stuck together with some sort of adhesive and over the years, has begun to peel away a bit like a poorly applied window tint, if you know what I mean.

I've tried re-pressing them together and it improves screen visibility as the air is driven out but it doesn't stay stuck any more due to contamination.

Frustrated with it, I gently peeled the two layers apart and cleaned off all the residual glue.

Does anyone know of a product or technique that'll allow me to re-glue them together without affecting their opacity?

Unread post by **myglaren** » 09 May 2010, 16:06

We use something at work that is perfectly clear BUT it needs curing with a fairly powerful UV lamp.

I'll ask what it is in the morning and may be able to obtain a 'sample'.

We use it to apply the glass/plastic 'crystals' to the glazing unit in door panels.

WBGP
Unfortunately you need Silverlight to view the 'virtuoso' door panels and I ain't got it, perhaps you have?
(it is supposed to be cross-platform compatible with 'Mono' but that's Microsoft for you

)

MikeT · Unread post by **MikeT** » 09 May 2010, 18:10

Hi Steve,

How powerful a UV is needed? I've got a ~18" black light somewhere in the cupboard.

If you could obtain more details, I'd appreciate it.

Apparently Silverlight is installed on my pc as I could view the video ok, thanks.

Unread post by **myglaren** » 09 May 2010, 19:50

Couldn't say but will find out tomorrow, also the exposure time which I believe is around four minutes. The tubes we use are around 5' and there are about six to a lightbench as the whole panel has to be exposed in one go.

MikeT · Unread post by **MikeT** » 09 May 2010, 19:56

There's some sunbed parlours in Boscombe if my lamps not good enough

Unread post by **myglaren** » 09 May 2010, 19:57

Not sure that the spectrum would be suitable - some UV is better than others

Unread post by **myglaren** » 10 May 2010, 17:38

OK, got some adhesive but the guys were unsure as to how suitable it would be for plastic so you may need to experiment a bit with it.

I obtained two vatieties, one which will cure in daylight (they both will but the other one takes longer) the other under UV light and sunbed type lights will work.

I also picked up some pieces of glass the try the stuff out on.

If you PM me your address I'll try and get them packed up and despatched but I'm babysitting tonight so may not manage it.

If you are going th the Wetherby meet I could hand them over there if that would suit you?

MikeT · Unread post by **MikeT** » 10 May 2010, 18:29

Thank you so much Steve, that is fantastic news. PM sent.

Unread post by **myglaren** » 10 May 2010, 21:17

My pleasure Mike, hope it solves the problem

MikeT · Unread post by **MikeT** » 15 May 2010, 13:36

Hi Steve,

This glue you sent me seems just the ticket for this job, many thanks again!

Any idea what they use to remove the excess? It seems the adhesive exposed to air doesn't cure, or doesn't cure anywhere near as fast as that between the sheets which happened within minutes of using the UV.

Unread post by **myglaren** » 15 May 2010, 19:24

AFAIK they use a razor blade - we buy 'special' old fashioned single blades with a stiffener along the unsharpened edge.
A Stanley knife blade would do.

We also have an adhesive solvent - Solvent #3, that is used to clean residue from the glass.

I can send you a bottle down on Monday.

MikeT · Unread post by **MikeT** » 16 May 2010, 11:26

Hi Steve,

I thought that might be the case. A glass scraper is a no-no for perspex, at least in my hands. Is your solvent used on perspex as well?

Unread post by **myglaren** » 16 May 2010, 15:43

Well, we don't use Perspex so no, it isn't.

I'll see if I can locate a sample and try it, we also have some Solvent #5 so I'll try that too.

It is kept in polythene containers so may not be harmful to other plastics although it does dissolve latex gloves rather well