BS EN ISO 20863:2004 – Footwear — Test method for stiffeners and toepuffs — Bondability

1 Scope
This document specifies a method for the determination of the bondability of heat activated and solvent activated stiffeners and toepuffs to upper and lining materials.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 12222, Footwear — Standard atmospheres for conditioning and testing of footwear and components for footwear.
EN ISO 3696, Water for analytical laboratory use — Specification and test methods (ISO 3696:1987).
EN ISO 4048, Leather — Determination of matter soluble in dichloromethane (ISO 4048:1977).
EN ISO 7500-1, Metallic materials — Verification of static uniaxial testing machines — Part 1: Tension/compression testing machines — Verification and calibration of the force-measuring system (ISO 7500-1:2004).
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
bondability
aptitude of a material to be bonded to it self or to other material by applying pressure and/or heat and eventually adhesive.
4 Apparatus and materials
4.1 General
The following apparatus and materials shall be used.
4.2 Tensile testing machine with a jaw separation rate of 100 mm/min ± 10 mm/min, an appropriate force range (this will usually be less than 100 N), capable of measuring the force to an accuracy of better than 2 % as specified by class 2 in EN ISO 7500-1, which registers the force applied in terms of the displacement.
4.3 Press knife or other means of cutting rectangular test specimens of (150 mm ± 10mm) x (30 mm ± 2 mm).
4.4 Press with the following characteristics.
4.4.1 Heated plates which can maintain a pre-established temperature with a precision of ± 5 ºC.
4.4.2 Operating pressure of 245 kPa ± 5 kPa (245 kPa are 2,5 kg/cm 2 ).
4.5 Reference leather, full chrome splits (thickness of 1,5 mm to 1,7 mm) with a grease content of 4 % in total fat and 1 % in fatty acid (see EN ISO 4048).
4.6 Non-woven fabric, 150 g ± 20 g per square metre.
4.7 Water distilled or deionised complying with grade 3 of EN ISO 3696.
5 Sampling and conditioning
5.1 Method 1: Heat activated materials
5.1.1 Cut sufficient strips of (150 mm ± 10 mm) x (30 mm ± 2 mm) from the sample and the corresponding strips of the same size from the non-woven fabric and the reference leather (4.5) or the material to be used.
5.1.2 Make a “compound test piece” of leather-sample-non-woven fabric. A strip of paper is placed on one of the short sides between the leather and the sample, so that 20 mm remain unstuck and so that the ends can be held in the jaws of the tensile testing machine.
NOTE The side of the material to be tested should be that in contact with the standard leather, i.e. the side that in the shoe will be in contact with the upper leather.
5.1.3 Unless the manufacture establishes the application conditions, follow the Clauses 5.1.4 and 5.1.5.
5.1.4 Place the compound test piece between both press plates heated to 70 ºC ± 5 ºC, and apply a pressure of 245 kPa ± 5 kPa for 10 s.
5.1.5 Repeat the procedure described in sections 5.1.2 and 5.1.4 with the other test pieces and both press plates heated to 90 ºC ± 5 ºC, 110 ºC ± 5 ºC, 130 ºC ± 5 ºC and 150 ºC ± 5 ºC, respectively.
5.1.6 Condition the set test pieces in a conditioned environment as specified in EN 12222 for 24 h.
BS EN ISO 20863:2004 – Footwear — Test method for stiffeners and toepuffs — Bondability