предговор
ИСО (Међународна организација за стандардизацију) је глобални савез националних тела за стандардизацију (Тела чланица ИСО). Развој међународних стандарда се обично спроводи преко ИСО техничких комитета. Свака институција чланица заинтересована за предмет за који је основан технички комитет има право да буде заступљена у тој комисији. Међународне владине и невладине организације које су у вези са ИСО такође су укључене у овај посао. ИСО блиско сарађује са Међународном електротехничком комисијом (ИЕЦ) о свим питањима електротехничке стандардизације.

Процедуре које се користе за израду овог документа и оне које се користе за даље одржавање описане су у Делу 1 ИСО/ИЕЦ директиве. Нарочито, обратите пажњу на различите стандарде одобрења који су потребни за различите типове ИСО докумената. Овај документ је израђен у складу са правилима уређивања у Дел 2 ИСО/ИЕЦ директиве (види исо.орг/дирецтивес).

Please note that certain contents of this document may be subject to patent rights. ИСО није одговоран за идентификацију било ког или свих таквих патената. Details of any patent rights identified during the preparation of the document will be in the introduction and/or list of patent claims received by ISO (see iso.org/patents).

Any trade names used in this document are information provided for the convenience of the user and do not constitute an endorsement.

Voluntary, related standards and conformity assessment related ISO specific and express the meaning of terminology as well as in relevant ISO technical barriers to trade (ТБТ) adhere to the principle of the world trade organization (WTO) information, please refer to the iso.org/iso/foreword.html.

This document has been prepared in cooperation with the Technical Committee’s ISO/TC 6 (Папир, Board and pulp), SC 2 Subcommittee (Test methods and quality specifications for paper and board) and the Technical Committee of the European Committee for Standardization (CEN) CEN/TC 172 (Pulp, Папир и картон), According to the Technical Cooperation Agreement between ISO and CEN (Vienna Agreement).

The third edition cancelled and replaced the technically revised second edition (ИСО 12625-4:216).

The main changes are as follows:

— Includes Appendix B, which describes the method for determining the tensile modulus.

A list of all the parts in the ISO 12625 series can be found on the ISO website.

Any feedback or questions about this document should be directed to the user’s national standards body. A complete list of these institutions can be found at www.iso.org/members.html.

1 домет
This document specifies test methods for the determination of tensile strength maximum tensile strength and tensile energy absorption of tissue and household paper products. It uses tensile testing equipment that operates at constant elongation.

It also provides the calculation methods of tensile index and tensile energy absorption index.

2 Normative references
The following files are referenced in the text in such a way that some or all of the content constitutes the requirements of this document. За датиране референце, citation-only versions apply. For undated references, the new version of the reference (укључујући све ревизије) примењује.

ИСО 186, Папир и картон — Sampling to determine average quality

ИСО 187, Папир, board and pulp — Standard atmospheres for conditioning and testing and procedures for monitoring sample atmospheres and conditioning

ИСО 1924-2, Папир и картон – Determination of tensile properties – Парт 2: Constant elongation method (20 mm/min)

ИСО 7500-1, Metallic materials – Calibration and verification of static uniaxial testing machines – Парт 1: Tensile/compression testing machines – Calibration and verification of force measurement systems

ИСО 12625-1, Tissue paper and tissue products – Парт 1: Vocabulary

ИСО 12625-6, Tissue paper and tissue products – Парт 6: Determination of gram weight

ИСО 12625-4-2022 Tissue paper and tissue products – Парт 4: Determination of tensile strength, maximum tensile strength and tensile energy absorption

3 Terms and Definitions
For the purposes of this document, the terms and definitions set forth in ISO 12625-1 and below apply.

3.1 Tensile strength

The maximum tensile force per unit width that a specimen can withstand before breaking

3.2 Tensile index

Tensile strength (3.1) divided by gram weight

3.3 Maximum tensile force

The ratio of the elongation of the specimen over its initial length at the moment when the maximum tension is reached during the tensile test

Белешка 1: The stretch at maximum force is expressed as a percentage of the initial test span length.

Белешка 2: Relaxation correction is used in this procedure, and elongation is not measured until a force of (0,25 ± 0,05) Н.

3.4 Tensile energy absorption

The energy absorbed when stretching a specimen under tensile force per unit surface area until fracture begins (maximum pulling moment)

[Извор: ИСО 12625-1:2019, 3.53.1.3]

3.5 Tensile energy absorption index

Tensile energy absorption (3.4) divided by gram weight

[Извор: ИСО 1924-2:2008, 3.7]

3.6 Tensile modulus M

The slope between the two points of tension on the elongation curve obtained from a constant elongation device

Белешка 1: In the paper industry, “modulus” refers to the tensile stiffness of paper, units of force per unit width (as opposed to true “stress” in engineering terms, тј. force per unit area).

Белешка 2: This procedure is optional, but if the tensile modulus is required as a measurement for this method, it should be measured and calculated according to the procedure in Annex B.

Јаван је само одељак са стандардним информацијама. Да бисте видели цео садржај, морате купити стандард преко званичних канала.