BS EN ISO 29862:2019 pdf download – Self adhesive tapes – Determination of peel adhesion properties 5.3.2 Tensile testing machine A constant rate of extension (CRE) tension tester shall be used. It is proposed to use an electronic machine taking at least one reading per mm of tape peeled. The tester shall have two clamps with centres in the same plane, parallel with the direction of the motion on the same plane, parallel with the direction of the motion on the stressing clamp and so aligned that they will hold the specimen wholly in the same plane; a means of moving the stressing clamp at a uniform rate of (5 ± 0,2) mm/s and a device for recording load. The instrument shall be calibrated such that a maximum error of 2 % is allowed on the reading. 5.3.3 Stainless steel panels These shall be perfectly flat, at least 125 mm long and 50 mm wide and at least 1,1 mm thick, stainless steel type 1.4301 in accordance with the 2 R quality defined in EN 10088-2, having a bright annealed finish with a surface roughness of 50 nm ± 25 nm. Panels showing stains, discoloration or many scratches are not acceptable. New panels shall be cleaned prior to use as described in 5.5.2 except with ten washes of the final solvent. Between uses the panel test surface shall be protected from scratches and contamination and the panels shall be stored in the conditions described in 5.4.1. 5.3.4 Roller mechanically or hand operated 5.3.4.1 A steel roller (85 ± 2,5) mm in diameter and (45 ± 1,5) mm in width, covered with rubber approximately 6 mm in thickness, having a hardness of (80 ± 5) Shore A. The surface shall be a true cylinder, void of any convex or concave deviations. The mass of the roller shall be (2 ± 0,1) kg. 5.3.4.2 No part of the apparatus shall increase the mass of the roller during use. The roller shall move either mechanically or by hand at the rate of (10 ± 0,5) mm/s. 5.4 Test samples and test pieces 5.4.1 Condition the sample rolls of tape in the standard conditions of (23 ± 1) °C and (50 ± 5) % relative humidity (RH). Test at these conditions unless otherwise specified [see 5.7 i)]. If these tolerances cannot be maintained, the closest possible tolerances shall be used and these revised tolerances...
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