Hong-Jian ZHANGMing LIN, Zhi-Feng ZHENG, Ben-An LIU, Jian-Ke MEI
R & D and Industrial Application of Bio-JointedPhenol Formaldehyde Resin as a Wood Adhesive
Wood Products Research Institute of
Southwest Forestry College
Kunming Xi-Mu Wood Products R & D Corporation
POB 126, Bai Long Si, Kunming, 650224
China
Southwest Forestry CollegeKunming, China
Kunming Xi-Mu Wood ProductsR & D Corporation, China
Southwest Forestry CollegeKunming, China
Kunming Xi-Mu Wood ProductsR & D Corporation, China
Aims: ◆ Reduce the dependency on and consumption of
the petro-chemical resources with converting the
renewable bio-materials into chemicals
◆ To avoid such a complicated technology as
extraction, filtration, purification and even powdering
Southwest Forestry CollegeKunming, China
Kunming Xi-Mu Wood ProductsR & D Corporation, China
Industrial Products ◇ Activated powder of the biomass for replacing phenol,
granularity ≤ 80 mm.
◇ WPF A for concrete form plywood
◇ WPF B for container flooring plywood
◇ WPF bonded 9 layer concrete form plywood of Masson pine
◇ WPF bonded 21 layer container flooring plywood of Colon
and the other hardwoods
Methords1. Raw materials ◆ Active powder from walnut shell and the other bio-masses
◆ Phenol, formaldehyde, catalysts
◆ Veneer of birch and pine
◆ filler: wheat flour
2. Equipment Industry 5 ton kettle for WPF cooking, mixer and spreader, single-
opening pre-press, 10 opening hot press, processing control instrument,
rotary viscosimeter, mechanical property testing machine, and etc.
Southwest Forestry CollegeKunming, China
Kunming Xi-Mu Wood ProductsR & D Corporation, China
Performance of the WPF ◆ Appearance: Brown liquid ◆ Solid contend: 42 ~ 50 % (deferent usage) ◆ Viscosity: 180 ~ 600 mPa.s (deferential) ◆ Brominable substance content: ≥12 % ◆ pH: 11 ~ 12 ◆ Gel time (150 )℃ : 90 s ◆ Free phenol content: ≤0.3 % ◆ Free formaldehyde content: ≤0.3 % ◆ Storage period (20℃): ≤20 days
Southwest Forestry CollegeKunming, China
Kunming Xi-Mu Wood ProductsR & D Corporation, China
Gluing conditions of WPF foreither concrete form or container floor: ◆ Moisture content of the veneer: 10~13% ◆ Filler: 6 ~ 12 % against the resin ◆ Glue spread: 320 ~ 360 g/m2, 2 sides ◆ Assembly time: 30 min ◆ Pre-pressing time: 20 min ◆ Temperature of hot pressing: 125~135℃ ◆ Pressure of hot pressing: 1.1~1.6 Mpa ◆ Duration of hot pressing: deferential
Southwest Forestry CollegeKunming, China
Kunming Xi-Mu Wood ProductsR & D Corporation, China
Bonding effectiveness ◆ Bonding strength: ≥0.8 ~ 2.2 Mpa
(for deferent products)
◆ Wood failure ratio: ≥90 %
◆ Durability: > 3 cycles (2h boiling & 4h 120℃
drying), unfailed glueline ≥ 80 %
◆ Free formaldehyde emission: < 0.3 mg/L
Southwest Forestry CollegeKunming, China
Kunming Xi-Mu Wood ProductsR & D Corporation, China
Summary ◆ Both the gluing technology and bonding
effectiveness of WPF are similar with
those of PF
◆ The cost of WPF is 6 ~ 12% lower than
that of PF against the phenol at 1,000~
2,130 USD/T
Southwest Forestry CollegeKunming, China
Kunming Xi-Mu Wood ProductsR & D Corporation, China
Conclusions Technology of both producing and application of BPF are feasible and reliable, including: ◆ Technology for active powder from bio-mass mainly from
walnut shell
◆ Full use of the bio-material without any residue and pollution
◆ 25 ~ 40% replacement for phenol with the bio-material
◆ Co-polymerizing technology with phenol and formaldehyde
◆ Gluing technology for veneer based panels
Southwest Forestry CollegeKunming, China
Kunming Xi-Mu Wood ProductsR & D Corporation, China
Southwest Forestry CollegeKunming, China
Kunming Xi-Mu Wood ProductsR & D Corporation, China
Thanks!