GB/T17657-2013 Test Method for Physical and Chemical Properties of Wood-based Panels and Decorative Wood-based Panels: Determination of Impregnation Peeling Performance
19 Determination of immersion stripping performance
19.1 Principle
Determine whether the adhesive layer of the test piece has peeled off and the degree of peeling after immersion and drying.
This method is applicable to single-board artificial boards.
19.2 Instruments
19.2.1 Water tank, capable of maintaining a temperature of (35 ± 3) ℃.
19.2.2 Water tank, capable of maintaining a temperature of (63 ± 3) ℃.
19.2.3 Sink, which can keep the water boiling.
19.2.4 Blast drying oven, capable of maintaining a temperature of (63 ± 3) ° C.
19.2.5 Steel ruler with a division value of 0.1mm.
19.3 Specimen size
Length l=(75 ± 1) mm, width b=(75 ± 1) mm.
19.4 Method
19.4.1 Specimen processing conditions:
a) Type I immersion peeling test: immerse the test piece in boiling water for 4 hours, remove it, and dry it in a drying oven at (63 ± 3) ° C for 20 hours. Then immerse the test piece in boiling water for 4 hours, remove it, and then dry it in a drying oven at (63 ± 3) 1 for 3 hours. When immersing the specimen, it should be completely immersed in boiling water.
b) Type II immersion peeling test: immerse the test piece in hot water at (63 ± 3) ℃ for 3 hours, remove it, and then dry it in a drying oven at (63 ± 3) ° C for 3 hours. When immersing the specimen, it should be completely immersed in hot water.
c) Class III immersion peeling test: immerse the test piece in warm water at (35 ± 3) ℃ for 2 hours, then take it out and dry it in a drying oven at (63 ± 3) ° C for 3 hours. When immersing the test piece, it should be completely immersed in warm water.
19.4.2 Carefully observe whether there is peeling and delamination between the adhesive layers of the test piece or between the veneer layer and the substrate. Use a steel ruler to measure the length of the peeled or layered parts on each side of each adhesive layer of the test piece.
19.5 Expression of Results
Expressed as the length of the peeled or layered part, if one side of the peeled or layered part is divided into several segments, it should be accumulated and added up to the nearest 1 mm.
