BS EN ISO 5404:2011 pdf free.Leather一Physical test methods – Determination of water resistance of heavy leathers (ISO 5404:2011).
BS EN ISO 5404 specifies a method for determining the water resistance of heavy leathers. The method allows determination of the penetration time, water absorption, area of penetration and water penetration rate as required, It is applicable to all types of heavy leathers.
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.
ISO 2418, Leather — Chemical, physical and mechanical and fastness tests — Sampling location
ISO 2419, Leather — Physical and mechanical tests — Sample preparation and conditioning
ISO 2589, Leather — Physical and mechanical tests — Determination of thickness
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
penetration time
duration of flexing which is just sufficient to cause water to cross from the wetted (grain) surface to the other face of the test piece
NOTE The penetration time is expressed in minutes.
3.2 water absorption
gain in mass of the test piece due to water content during any period of the test
NOTE Water absorption is expressed as a percentage of the conditioned mass of the test piece prior to test.
3.3 area of penetration
sum of the areas where water has crossed from the wetted (grain) surface to the other face of the test piece
NOTE The area is expressed in square millimetres.
3.4 penetration rate
rate at which water is transmitted through the leather
4 Principle
The test piece is continuously wetted on one surface and is flexed and compressed in the same manner as the sole of a shoe during walking. This enables various aspects of heavy leather water resistance to be measured with respect to time.
5 Apparatus
5.1 Test machine, including the items described in 5.1.1 to 5.1.7. The general arrangement of the test
machine is shown in Figure 1.
5.1.1 Roller (A). diameter 120 mm ± 2 mm and width at least 50 mm.
5.1.2 Platform (C). measuring 100 mm 1 mm x 40 mm ± 1 mm, with a roughened upper surface and sufficient perforations to keep the surface wet by a flow of water through the platform.
5.1.3 Clamp (D). to hold one short side of the test piece (B) in a horizontal position on the platform (C).
5.1.4 Clamp (E), to attach the other short side of the test piece to the roller, the attached side being parallel to the axis of the roller. The clamp is held by a weak spring to maintain the sample under slight tension. The positioning of clamps D and E shall ensure a total length of test piece on the platform of 100 mm ± 1 mm.
5.1.5 Water supply (F), through the platform (C) and a means of draining away excess water.
5.1.6 Means of moving the axis of the roller, using a crank motion along the horizontal line XY with an amplitude of 100 mm ± 2 mm and a frequency of (20 ± 1) cycles per minute about a point directly over the mid-point of the test piece. The movement of the axis causes the roller to move backwards and forwards along the test piece, raising one end and bending it to conform to the shape of the roller.
5.1.7 Means of pressing the platform, test piece and roller together with a fcxce of 80 ± 5 N.BS EN ISO 5404 pdf download.
Tags: Leather
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