GB/T17657-2013 Test Method for Physical and Chemical Properties of Wood-based Panels and Decorative Wood-based Panels: Determination of Peel Resistance
20 Determination of peel resistance
20.1 Principle
Determine the force required to peel off the surface layer. This method is applicable to PVC film veneer artificial board.
20.2 Instruments
Universal mechanical testing machine, with a load range of 0 N-500 N. The measurement accuracy is 1% of the load value.
20.3 Test pieces
20.3.1 Specimen size
Length l=(100 ± 1) mm. Width b=(25 ± 1) rnm
According to Figure 25, a groove is made at a distance of 10 mm from one end of the test piece. The groove is deep enough to bond with the PV film.
Unit in millimeters
explain:
1- Slot (width 1 mm to 3 mm):
2- Artificial board substrate;
3- PVC film
Figure 25 Diagram of Peel Resistance Test Piece
20.3.2 Specimen balance treatment
Artificial board constant temperature and humidity box. png
If necessary, place the test piece in an environment with a temperature of (20 ± 2) ° C and a relative humidity of (65 ± 5)% until its mass remains constant. The difference between the two weighing results after a 24 hour interval shall not exceed 0.1% of the mass of the test piece, which is considered to be a constant mass.
20.4 Method
As shown in Figure 26, reverse the PVC film by 180 °, peel off a certain length, and clamp it in the testing machine fixture. Stretch the test piece at a loading speed of less than 588 N/min at both ends. Measure the maximum load of the PVC film and substrate adhesion, accurate to 1 N.
20.5 Expression of Results
20.5.1 The peel resistance of the test piece is the maximum tensile force of the PVC film and substrate bonding, accurate to 1 N.
20.5.2 The arithmetic mean value of peel resistance of all test pieces in the same plate shall be accurate to 1 N.
Unit in millimeters
Description: 1- Clamp;
2- Artificial board substrate;
3- PVC film;
4- Test block with approximately twice the thickness of the substrate
