increased, formaldehyde emission also increased. The
reduction ratio of formaldehyde emission was much
higher than the reduction ratio of bonding strength,
when 30% of PVAc was add ed. It is possible to reduce
formaldehyde emission with just small decreasing
bonding strength by ad ding just 30% of PVAc.
When we blended MF resin and PVAc toget her,
wheat flour was used as mate rial to increase the quantity
and viscosity