On 04/09/2020 23:47, TimW wrote:
On 04/09/2020 23:05, Chris Hogg wrote:
On Fri, 4 Sep 2020 21:07:59 +0100, TimW wrote:

Question is would PVA adhesive glue perspex sheet to wood at all,
slightly or well?

I am designing my own variation on a beehive that has an inspection
window.

Make sure the window is removable, because you'll need to clean it
from time to time to get the wax and propolis off, otherwise it'll
become opaque and defeat the object of the exercise.

The hive boxes are softwood, glued with PVA for it's safe
non-toxic nature. I want to use 3mm perspex for the pane and I want to
glue and screw it in in such a way that it enhances the structure of the
box. Unlike for example a loose piece of glass which would require wood
and joints all round it to support it.

TW


These are Warre hives and new for me. The inspection window is a common
modification and they aren't removable for cleaning normally. In theory
you get the box back off the hive after 2 or 3 seasons with the Warre
system so I guess you would clean them then. I hear you can't see much
anyway but you can at least see if comb has been built without opening
the hive.

TW

Difficult to comment without knowing a bit more about the materials,
construction, and any constraints. I'd have thought that with sufficient
screws you would have enough structural strength.

I'd think about using polycarbonate rather than perspex.

If you do need bonding from the adhesive I'd have thought that impact
adhesive would work, and that once the solvent had evaporated completely
there wouldn't be any toxicity. Maybe give it a few weeks? I guess hot
melt would also work (but I find that better for "single blobs" rather
than long bead type applications). If the window is lap jointed over a
hole in the wood panel I suppose you could add something like a weld
bead all around the edges on either or both sides.