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!