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Plywood bonding strength measurement method

DATE:2011-7-12  Information source:Zhongxin Wood Co., Ltd.
Plywood bonding strength measurement method
  1 measured according to the provisions of GB9846.10 specimen size.
  2 plywood specimen according to their respective categories were handled by the following conditions:
  2.1 Ⅰ like plywood: the specimen in boiling water to cook 4h, then 63 ± 3 ℃ air convection oven drying 20h, and then in boiling water for 4h, cooled at room temperature after removing 10min. Specimen should be cooked all the specimens immersed in boiling water and cook stamped.
  Note: factory production allows the use of rapid testing methods 3h boiling, the measured results of product testing by a factor of 0.9 as the bonding strength value, but in case of supply and demand sides of the dispute needs to retest class Ⅰ plywood When drying cycle is still 28h cooking method as a way to promote the CD.
  2.2 Ⅱ like plywood: the specimen on the 63 ± 3 ℃ hot water dipping 3h, cooled at room temperature after removing 10mim. Dipping the specimen should be immersed in hot water in all specimens and stamped.
  Note: factory production allows the use of 63 ± 3 ℃, 1h quick dip test method, the measured results of product testing by a factor of 0.82 as the value of bonding strength, but in case of supply and demand sides of the dispute to be Ⅱ Class plywood retest, the still hot water immersion method 3h as arbitration
  2.3 Ⅲ type plywood: the specimen immersed in water 63 ± 3 ℃ 2h, and then each separate flat specimen at 63 ± 3 ℃ air convection oven drying 1h, at room temperature after removing 10min.
  2.4 Ⅳ like plywood: the moisture content to meet the requirements for dry-shaped test specimen. NOTE: moisture content of the specimen should be controlled at 8% to 12%
  2.5 clamped at both ends of the specimen in the testing machine, a fixture of activities, so that a straight line, the specimen center activities should be through the testing machine fixture axis. Clamping position and distance from the specimen notch within the scope should be 5mm.
  2.6 to loading the specimen to constant sabotage, the loading speed of 10MPa/min. The greatest damage load readings should be accurate to 5N.
Zhongxin wood co.,LTD Su ICP NO.11052385 ADD:Industrial park of old floor
TEL:86-0516-86418426 FAX:86-0516-86418188
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