introduction
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ISO 12625-5-2016 “Tissue paper and tissue paper products – Determination of wet tensile strength – Part 5”
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This document has been prepared by the Technical Committee CEN/TC 172 (Pulp, paper and Board) of the European Committee for Standardisation (CEN) in collaboration with ISO Technical Committee TC 6 (Paper, board and pulp) and Sub-Committee SC 2 (Test methods and quality specifications for paper and board). Comply with the technical cooperation Agreement between ISO and CEN (Vienna Agreement).
The second edition cancelled and replaced the first edition (ISO 12625-5:2005), which was technically revised with the following changes:
a) in article 7, include a more detailed description of the preparation of specimens;
b) In Article 8, the measurement procedure is specified;
c) In Article 10, the test report shall contain other information;
d) More detailed accuracy data in Annex A;
e) This document has been edited and updated.
A list of all parts in the ISO 12625 series can be found on the ISO website.
ISO 12625-5-2016 “Tissue paper and tissue paper products – Determination of wet tensile strength – Part 5”
1 Range
This document specifies a test method for determining the wet tensile strength of tissue paper and tissue paper products after immersion in water using a tensile strength test equipment operating at constant elongation.
Currently, there are two types of tensile strength test equipment on the market, one is placed vertically and the other is placed horizontally. This document applies to both. For vertical tensile strength test equipment, a device fixed to the grip under the tensile strength test equipment, called a finch cup, is used to achieve wetting. For horizontal tensile strength test equipment, the soaking device is placed between the fixtures.
Where impurities and impurities need to be identified, ISO 15755[6] is suitable for these tests in tissue and tissue products.
2 Normative references
The following files are referenced in text in a manner that constitutes part or all of the requirements of this document. For dated references, only the cited version applies. For undated references, a new version of the reference (including any revisions) applies.
ISO 186, Paper and board – sampling to determine average quality
ISO 187, Paper, board and pulp – Standard atmospheres for conditioning and testing and procedures for monitoring sample atmospheres and conditioning
ISO 12625-5-2016 “Tissue paper and tissue paper products – Determination of wet tensile strength – Part 5”
ISO 1924-2, Paper and board – Determination of tensile properties – Part 2: constant elongation method (20 mm/min)
ISO 7500-1, Metallic materials – Calibration and verification of static uniaxial testing machines – Part 1: Tensile/compression testing machines – Calibration and verification of force measuring systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12625-1 and below apply.
3.1 Wet tensile strength
In a tensile test, the maximum tensile force per unit width of a waterlogged specimen before it breaks
Note 1: Wet tensile strength is expressed in Newtons per meter (N/m).
3.2 Wet tensile strength retention
The ratio of the tensile strength of the wet sample to the tensile strength of different samples from the same sample under dry conditions, expressed as a percentage
Note 1: Compliant with ISO 187.
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