ISO 17130:2021 INTERNATIONAL STANDARDIULTCS/IUP 55:2021(E)Leather — Physical and mechanical tests — Determination of dimensional change
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INTERNATIONAL STANDARDIULTCS/IUP 55:2021(E)Leather — Physical and mechanical tests — Determination of dimensional change由ISO于2021-02发布，适用于全球。标准截图
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标准文档类型为INTERNATIONAL STANDARDIULTCS/IUP 55:2021(E)Leather — Physical and mechanical tests — Determination of dimensional change高清PDF版本（文字版），标准文档内可进行搜索，可以复制原文，可粘贴。标准部分原文
INTERNATIONAL STANDARD
IULTCS/IUP 55:2021(E)
Leather — Physical and mechanical tests — Determination of dimensional change
1 Scope
This document specifies a method of determining the dimensional change (shrinkage) of leathers caused by ageing. It is applicable to all leathers.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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 105-B06, Textiles — Tests for colour fastness — Part B06: Colour fastness and ageing to artificial light at high temperatures: Xenon arc fading lamp test
ISO 2418, Leather — Chemical, physical and mechanical and fastness tests — Sampling location
ISO 2419, Leather — Physical and mechanical tests — Sample preparation and conditioning
ISO 17228:2015, Leather — Tests for colour fastness — Change in colour with accelerated ageing
3 Terms a nd definiti ons
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www. iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/ 4 Principle
A conditioned test piece is aged using the conditions defined in ISO 17228. The shrinkage is determined after reconditioning.
5 Apparatus and materials
5.1 Oven, as specified in ISO 17228.
5.2 Climate chamber, as specified in ISO 17228.
5.3 Vernier calliper, reading to 0,1 mm.
5.4 Support, glass plate or suitable stainless-steel mesh, that keeps the test piece flat. Support shall be covered with a polyester nonwoven fabric, as specified in ISO 105-B06, to prevent the test piece from sticking.
5.5 Press knife, square, as specified in ISO 2419, with inner walls measuring 150 mm ± 1 mm.
IULTCS/IUP 55:2021(E)
5.6 Indelible marker or needle with a diameter less than or equal to 1 mm.
6 Sampling and sample preparation
6.1 Sample in accordance with ISO 2418. Cut at least two test pieces (150 × 150) mm for each of the ageing conditions required, by applying the press knife (5.5) to the grain surface, if distinguishable.
For some applications, it can be necessary to use larger test pieces, for example (300 × 300) mm to enhance the accuracy, especially in the case of low shrinkage.
6.2 Using an indelible marker or needle (5.6), mark four measurement reference points, A, B, C and D, on the test pieces such that they form a square having sides of (100 ± 1) mm as shown in Figure 1.
Dimensions in millimetres ± 1 mm
Figure 1 — Location of measurement reference points on a test piece
If test pieces with another dimension, for example (300 × 300) mm, are used, the measurement points should be marked at a distance of (25 ± 1) mm from each edge.
6.3 Condition the test pieces in accordance with ISO 2419 for at least 48 h.
7 Procedure
7.1 Measure the distances AB, CD, AC and BD on each test piece using the Vernier calliper (5.3).
7.2 Preheat the oven (5.1) to the test temperature or adjust the climate chamber (5.2) to the starting conditions. Place the test pieces with the grain side, top side or coated side downward on the support (5.4) in the centre of the oven or climate chamber.
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