USES OF ALTERNATIVE EXTENDERS FOR PLYWOOD MANUFACTURING
DOI:
https://doi.org/10.5902/19805098396Keywords:
Extender, urea-formaldheyde resin, plywood, Eucalyptus cloeziana.Abstract
This research was developed aiming to evaluate the potentiality of soy bean, rice flour, maize flour, oatmeal and manioc flour, as alternative extenders to wheatmeal for plywood manufaturing. Twenty one boards were produced using Eucalyptus cloeziana venner, being three boards per treatment according to the following formulation in parts per wheight: urea-formaldheyde resin – 100, extender – 75, water – 80 and catalyst – 7. The average values of shear bonding tests (dry and wet), showed that the ricemeal and oatmeal could be used as an alternative extender to the wheatmeal.
Downloads
References
ALBA QUÍMICA. Boletim técnico: Ref: 15-09. 1990.
AMERICAN SOCIETY FOR TESTING AND MATERIALS. Testing venner, plywood and other glued veneer constructions. Philladelphia, 1982. (Annual Book of ASTM Standards, ASTM D-805)
BALDWIN, R.F. Plywood manufacturing practices. San Francisco: Miller Freeman, 1995. 388p.
COMMERCIAL STANDARD C.S. 35-61. Hardwood plywood. 1968.
MARRA, A. A. Technology of wood bonding: principles in practice. New York: Van Nostrand Reinhold, 1992. 453p.
MOREIRA, W.S. Extensores alternativos para produção de compensados com resina uréia-formaldeído. Curitiba: UFPR, 1985. 81p. Dissertação (Mestrado) – Universidade Federal do Paraná, 1985.
PIO, N.S. Avaliação da madeira de Eucalyptus scabra (Dum-Cours) e Eucalyptus robusta (Smith) na produção de painéis compensados. Curitiba: UFPR, 1996. 101p. Dissertação (Mestrado) – Universidade Federal do Paraná, 1996.
SELLERS JR., T. Plywood and adhesive technology. New York: Marcel Dekker, 1985. 661p.
U.S. PRODUCT STANDARD PS 1-74 – For Constructions & industrial plywood with typical APA grade-trade marks, Product Standards Section, National Bureau of Standard, 1974. 33p.
