увод
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 електричне 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, треба обратити пажњу на различите критеријуме одобрења који су потребни за различите типове ИСО докумената. This document has been drafted in accordance with the editing rules of ISO/IEC Directive Part 2 (види исо.орг/дирецтивес).

Please note that certain elements 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 found in the introduction and/or in the list of patent claims received by ISO (see iso.org/patents).

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

ИСО 12625-4-2022 “Toilet paper and sanitary paper products – Парт 4: Determination of tensile strength, tensile at break and energy absorption at stretch”

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 by the Technical Committee ISO/TC 6 (Папир, board and pulp), SC 2 Subcommittees (Test methods and quality specifications for paper and paperboard) in collaboration with the Technical Committee CEN/TC 172 (Pulp, paper and paperboard) of the European Committee for Standardization (CEN). In accordance with the Technical Cooperation Agreement between ISO and CEN (Vienna Agreement).

The third edition cancels and replaces the technically revised second edition (ИСО 12625-4:2016).

The main changes are as follows:

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

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

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

ИСО 12625-4-2022 “Toilet paper and sanitary paper products – Парт 4: Determination of tensile strength, tensile at break and energy absorption at stretch”

1 Range
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 test equipment that operates at a constant elongation rate.

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

2 Normative references
The following files are referenced in text in a manner that constitutes part or all of the requirements of this document. За датиране референце, примењује се само наведена верзија. For undated references, a 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 measuring systems

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

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

ИСО 12625-4-2022 “Toilet paper and sanitary paper products – Парт 4: Determination of tensile strength, tensile at break and energy absorption at stretch”

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

ISO and IEC maintain terminology databases for standardization at the following addresses:

– ISO Online browsing platform: available at iso.org/obp

– IEC electronic encyclopedia: доступно на елецтропедиа.орг/

3.1 Затезна чврстоћа

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

3.2 Tensile index I

Затезна чврстоћа (3.1) divided by gram weight

3.3 Stretch at maximum strength

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: This process uses relaxation correction, and the elongation is not measured until the force of (0,25 ± 0,05) Н.

ИСО 12625-4-2022 “Toilet paper and sanitary paper products – Парт 4: Determination of tensile strength, tensile at break and energy absorption at stretch”

3.4 Drawing energy to absorb TEA

Energy absorbed by stretching a specimen under tension 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 IZ

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 force points of the tensile force-elongation curve obtained from a constant elongation device

Белешка 1: In the paper industry, “modulus” refers to the tensile stiffness of the paper, the unit of force per unit width (as opposed to the 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.