ASTM D903-98 (R2017) pdf free download.Standard Test Method for Peel or Stripping Strength of Adhesive Bonds.
1.1 This test method covers the determination of’ the comparative peel or stripping characteristics of adhesive bonds when tested on standard-sized specimens and under defined conditions of pretreatment, temperature, and testing machine speed.
1 .2 The values stated in ST units are to he regarded as the standard. The values given in parentheses are fir information only.
4. Apparatus
4.1 Testing Machine -A power-driven machine, with a constant rate-ot-jaw separation or of the inclination balance or pendulum type, which fulfills the following requirements
4.1.1 The applied tension as measured and recorded is accurate within ± 1 %.
4.1.2 Hold specimens in the testing machine by grips which clamp firmly and prevent slipping at all times.
4. 1 .3 The rate of travel of the power-actuated grip is 305 mm (12 in.)/min. This rate which provides a separation of 152 mm (6 in.)/min is to be unitrm throughout the tests.
4.1 .4 Operate the machine without any device for maintaining maximum load indication. In pendulum-type machines. the weight lever swings as a free pendulum without engagement of pawis.
4.1 .5 The machine is autographic giving a chart having the inches of separation as one axis and applied tension as the other axis of coordinates.
4.1.6 The capacity of the machine is such that the maximum applied tension during test does not exceed 85 % nor be less than 15 % of the rated capacity.
4.2 Condirioning Room or Deswcarors—A conditioning room capable of maintaining a relative humidity of 50 ± 2 % at 23 ± 1 °C (73.4 ± 2°F). or desiccators filled with a saturated salt solution (Note 1)10 give a relative humidity of 50 ± 2 % at 23 ± 1 °C are required for the conditioning of some specimens.
5. Test Specimen
5.1 The test specimen, shown in Fig. 1(a). consists of one piece of flexible material. 25 by 304.8 mm (1 by 12 in.). bonded for 152.4 mm (6 in.) at one end to one piece of flexible or rigid material. 25 by 203.2 mm (1 by in.), with the unhonded portions of each member being face to face.
5.2 In order to maintain a separation rate ot I 52.4 mm (6 in.)/min the specimen is to be relatively nonextensible in the expected loading range. Where a material is sufficiently extensible to lessen radically the separation rate, back it up with a suitable nonextensible material. In reporting such a test. completely identify the backing material and method.
5.3 Test materials are to be thick enough to withstand the expected tensile pull but not over 3 mm in thickness. ASTM D903 pdf download.