pva and bent laminations

[wharcline]

Hi, pretty much gotta ask, is it good long term? I don't want a call in 2 years time about the things delaminating. Some sites I've looked at say no. But its cheap, spreads well and I hate urea glue. Just used Selleys exterior for the higher solids.

600mm high, 8 plies of 2.5mm tas oak, 260 and 300mm radii. I've had about 2-3mm springback and no discernible creep on the end grain.

Thanks for any thoughts.

[Superbunny]

Well I've done rockers on two rocking chairs and no problems 4 years on. High heat and moisture are the main threats so do a good quality finish.

SB

[auscab]

I did the long rails to an oval dining table in Layers of Radiata Pine then veneered them with Mahogany . That was easy 10 years ago , no problems with that.

[elanjacobs]

As long as you clamp it well and give it plenty of time to dry, PVA is perfectly fine.

[Zed]

Titebond III is the go, its harder than standard PVA and will hold its stiffness better. use thin laminations and if possible more layers. I've done a little bit of lamination work and always used TBIII no problems. it's not even that expensive; carbatec sell it for about $40 for 3.8l (approx). I've had more success with bigger bends when I've pre wet the timbers to aid in the absorption of the glue into the wood fibres (i know glue generally sits on top but it seems to work for me). I'm always pretty generaous with the glue too- you dont want dry joints on bends.

[rrich]

I've used TBIII on white oak bent laminations. The only things that I can add are too many clamps and leave it in clamps for a day or so.

[double.d]

35 years ago as an apprentice i helped make a house lot of arched door frames out of 3mm ply and Selleys Aquadhere and i know for a fact that those frames still have doors swinging off them.