How can we make plywood from rice hulls? What should be the best adhesive to use for plywood?

Question

Please help me..This is for our investigatory project. Thanks for your help...

Answer 1

You can't make "plywood" from rice hulls! Plywood is made from solid sheets of wood bonded together, with the grain alternating.

You could however make "particle board". To do this would require some kind of glue and a press. If you're just making a small piece, then use elmers wood glue.

Answer 2

As said before, you can not make "plywood" from rice hulls, but particle board ( http://en.wikipedia.org/wiki/Particle_boardhttp://en.wikipedia.org/wiki/Particle_board ) can be made;
http://www.ipirti.gov.in/product%20development_8.htm
http://www.technology4sme.net/TechOffer/TechOfferDetail.aspx?OffId=228
http://www.ars.usda.gov/research/publications/publications.htm?SEQ_NO_115=165165


Basically you just coat your material with adhesive and press it flat, sounds simple, but what adhesive and how to get the pressure (perhaps over 100PSI or in the mega pascal range to press it may present challenges. Is this a college project? what sort of lab equipment do you have access to?

One option for adhesive that might be close to what is (or at least was) used commercially is a urea-formaldehyde glue like: http://www.dap.com/product_details.aspx?product_id=42
But you are presumably trying to be "green" using rice hulls, so you may want to avoid the formaldehyde.
I'm not sure what would be a good alternative, while it would probably result in a weak board, you might experiment with starch based adhesives as they might be very "green", depending on what sort of processing and additives were needed.

Answer 3

If it were made from rice hulls, I believe it would be called paper or cardboard depending on the thickness.
This does not mean that it might not be a useful material.
(Most ply woods use resorcinol resins IIRC.)

Answer 4

Conventional plywood is being replaced by OSB because it can be manufactured from smaller, faster growing trees. OSB is bonded together with Urea Formaldehyde.

Answer 5

wood glue