Tannin-based adhesives for bonding high-moisture Eucalyptus veneers: Influence of tannin extraction and press conditions

被引：29

作者：

Vazquez, G

Antorrena, C

Gonzalez, J

Alvarez, JC

机构：

[1] Department of Chemical Engineering, University of Santiago de Compostela, 15706 Santiago de Compostela, Avda. de las Ciencias s/n

来源：

HOLZ ALS ROH-UND WERKSTOFF | 1996年 / 54卷 / 02期

关键词：

D O I：

10.1007/s001070050144

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

The alkaline extraction of tannins from Pinus pinaster bark was studied as regards the influence of solid/liquid ratio, extraction time and NaOH concentration on the yield and Stiasny number of the extracts precipitated at pH 2. The extract with the highest Stiasny number(97) was copolymerized with a previously prepared resol to afford a resin with a 1:1 phenol/tannins ratio. Plywood boards of Eucalyptus globulus bonded with this resin at board humidities of 10 or 16%, temperatures of 130 or 185 degrees C and press times of 5 or 8 min all passed the WBP knife test (with one exception for the longer press time). We conclude that this resin is superior to commercial phenol-formaldehyde resins as regards its tolerance to moisture in plies and adhesive, its press time requirement, and its ability to bond veneers of woods known for their high levels of adhesive-repellent substances.

引用

页码：93 / 97

页数：5

共 10 条

[1] LOW FORMALDEHYDE EMISSION, FAST PRESSING, PINE AND PECAN TANNIN ADHESIVES FOR EXTERIOR PARTICLEBOARD [J].

PIZZI, A ;

VALENEZUELA, J ;

WESTERMEYER, C .

HOLZ ALS ROH-UND WERKSTOFF, 1994, 52 (05) :311-315

[2] FAST VS SLOW-REACTING NON-MODIFIED TANNIN EXTRACTS FOR EXTERIOR PARTICLEBOARD ADHESIVES [J].

PIZZI, A ;

STEPHANOU, A .

HOLZ ALS ROH-UND WERKSTOFF, 1994, 52 (04) :218-222

[3]

STEINER PR, 1993, FOREST PROD J, V43, P29

[4] PROPERTIES OF PHENOLIC-TANNIN ADHESIVES FROM PINUS-PINASTER BARK EXTRACTS AS RELATED TO BOND QUALITY IN EUCALYPTUS PLYWOODS [J].

VAZQUEZ, G ;

ANTORRENA, G ;

FRANCISCO, JL ;

GONZALEZ, J .

HOLZ ALS ROH-UND WERKSTOFF, 1992, 50 (06) :253-256

[5] STUDIES ON THE UTILIZATION OF PINUS-PINASTER BARK .2. KINETICS AND YIELDS OF ALKALINE EXTRACTIONS [J].

VAZQUEZ, G ;

ANTORRENA, G ;

PARAJO, JC .

WOOD SCIENCE AND TECHNOLOGY, 1987, 21 (02) :155-166

[6] EXTERIOR PLYWOOD RESINS FORMULATED FROM PINUS-PINASTER BARK EXTRACTS [J].

VAZQUEZ, G ;

ANTORRENA, G ;

FRANCISCO, JL ;

ARIAS, MC ;

GONZALEZ, J .

HOLZ ALS ROH-UND WERKSTOFF, 1993, 51 (03) :221-224

[7] INVESTIGATIONS ON BARK EXTRACTIVES OF PINUS HALEPENSIS MILL [J].

VOULGARIDIS, E ;

GRIGORIOU, A ;

PASSIALIS, C .

HOLZ ALS ROH-UND WERKSTOFF, 1985, 43 (07) :269-272

[8] WOOD ADHESIVES FROM PINUS-RADIATA BARK [J].

YAZAKI, Y ;

COLLINS, PJ .

HOLZ ALS ROH-UND WERKSTOFF, 1994, 52 (03) :185-190

[9] WOOD ADHESIVES BASED ON TANNIN EXTRACTS FROM BARKS OF SOME PINE AND SPRUCE SPECIES [J].

YAZAKI, Y ;

COLLINS, PJ .

HOLZ ALS ROH-UND WERKSTOFF, 1994, 52 (05) :307-310

[10] EXTRACTIVES FROM BLACKBUTT (EUCALYPTUS-PILULARIS) WOOD WHICH AFFECT GLUEBOND QUALITY OF PHENOLIC RESINS [J].

YAZAKI, Y ;

COLLINS, PJ ;

IWASHINA, T .

HOLZFORSCHUNG, 1993, 47 (05) :412-418

← 1 →