Author:
Asafu-Adjaye Osei,Alawode Abiodun,Via Brian,Banerjee Sujit
Abstract
Abstract
Soy flour can be substituted in polymeric diphenylmethane diisocyanate (pMDI) resin for bonding plywood. Resin bleed-through is avoided by prepressing at 95°C. The boards have greater wet and dry strength than do those prepared from melamine-urea-formaldehyde (MUF) resin. Soy flour can also be substituted in emulsion polymer isocyanates for cold-press applications. The soy increases dry strength but keeps the wet strength unchanged. The optimal level of soy flour substitution is about 20 percent in all cases as determined by infrared spectroscopy.
Subject
Plant Science,General Materials Science,Forestry
Reference16 articles.
1. American National Standard for Hardwood and Decorative Plywood (ANSI/HPVA HP-1-2020).
Hardwood Plywood & Veneer Association, Reston, Virginia. 51 pp. https://www.decorativehardwoods.org/sites/default/files/2022-03/ANSI-HPVA-HP-1%202020_FINAL1.pdf. Accessed February 28,
2023.
2. Asafu-Adjaye,
O.,
Alawode,
A.
Via,
B. K.
and
Banerjee.S.
2022.
Soy flour substitution in pMDI resin reduces press platen sticking,Forest Prod. J.
72(S1):
5–
7.
3. Asafu-Adjaye,
O.,
Via,
B. K.
and
Banerjee.S.
2020.
Increasing cold tack of pMDI resin with partial soy flour substitution.
Forest Prod. J.
70(1):
143–
144.
4. ASTM D1037-12.
2012.
Standard test methods for evaluating properties of wood-base fiber and particle panel materials.
American Society for Testing and Materials,
Philadelphia, PA.
5. Bekhta,
P.,
Niemz,
P.
and
Sedliacik.J.
2012.
Effect of pre-pressing of veneer on the glueability and properties of veneer-based products.
Eur. J. Wood Prod.
70:
99–
106.