prEN ISO 13997

Protective clothing - Mechanical properties - Determination of resistance to cutting by sharp objects (ISO/DIS 13997:2022)

Schutzkleidung - Mechanische Eigenschaften - Bestimmung des Widerstandes gegen Schnitte mit scharfen Gegenständen (ISO/DIS 13997:2022)

Vêtements de protection - Propriétés mécaniques - Détermination de la résistance à la coupure par des objets tranchants (ISO/DIS 13997:2022)

Varovalna obleka – Mehanske lastnosti – Ugotavljanje odpornosti proti urezu z ostrimi predmeti (ISO/DIS 13997:2022)

General Information

• Status: Not Published
• Publication Date: 03-Jan-2024
• ICS: 13.340 - Protective equipment
• ICS: 13.340.10 - Protective clothing
• Technical Committee: CEN/TC 162 - Protective clothing including hand and arm protection and lifejackets
• Drafting Committee: CEN/TC 162/WG 5 - Resistance to mechanical impact of protective clothing
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Start Date: 31-Jan-2023
• Completion Date: 31-Jan-2023
• Directive: 2016/425 - Regulation (EU) 2016/425 of the European Parliament and of the Council of 9 March 2016 on personal protective equipment and repealing Council Directive 89/686/EEC
• Mandate: M/031 - Standardization mandate to CEN/CENELEC concerning standards for Personal Protective Equipment
• Ref Project: oSIST prEN ISO 13997:2022 - Protective clothing - Mechanical properties - Determination of resistance to cutting by sharp objects (ISO/DIS 13997:2022)

Relations

• Revises: EN ISO 13997:1999/AC:2000 - Protective clothing - Mechanical properties - Determination of resistance to cutting by sharp objects (ISO 13997:1999)
• Effective Date: 19-Jan-2023
• Revises: EN ISO 13997:1999 - Protective clothing - Mechanical properties - Determination of resistance to cutting by sharp objects (ISO 13997:1999)
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN ISO 13997:2022
01-september-2022
Varovalna obleka – Mehanske lastnosti – Ugotavljanje odpornosti proti urezu z
ostrimi predmeti (ISO/DIS 13997:2022)

Protective clothing - Mechanical properties - Determination of resistance to cutting by

sharp objects (ISO/DIS 13997:2022)
Schutzkleidung - Mechanische Eigenschaften - Bestimmung des Widerstandes gegen
Schnitte mit scharfen Gegenständen (ISO/DIS 13997:2022)

Vêtements de protection - Propriétés mécaniques - Détermination de la résistance à la

coupure par des objets tranchants (ISO/DIS 13997:2022)
Ta slovenski standard je istoveten z: prEN ISO 13997
ICS:
13.340.10 Varovalna obleka Protective clothing
oSIST prEN ISO 13997:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 13997:2022
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oSIST prEN ISO 13997:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 13997
ISO/TC 94/SC 13 Secretariat: SNV
Voting begins on: Voting terminates on:
2022-06-09 2022-09-01
Protective clothing — Mechanical properties —
Determination of resistance to cutting by sharp objects

Vêtements de protection — Propriétés mécaniques — Détermination de la résistance à la coupure par des

objets tranchants
ICS: 13.340.10
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 13997:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022
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oSIST prEN ISO 13997:2022
ISO/DIS 13997:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on

the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below

or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
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Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
© ISO 2022 – All rights reserved
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oSIST prEN ISO 13997:2022
ISO/DIS 13997:2022(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction .................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative reference ........................................................................................................................................................................................1

3 Terms and definitions .................................................................................................................................................................................... 1

4 Sampling ....................................................................................................................................................................................................................... 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Textiles and other materials....................................................................................................................................................... 2

4.3 Gloves .............................................................................................................................................................................................................. 3

4.4 Conditioning.............................................................................................................................................................................................. 4

5 Test method ............................................................................................................................................................................................................... 4

5.1 Principle ....................................................................................................................................................................................................... 4

5.2 Test apparatus......................................................................................................................................................................................... 5

5.2.1 Rigid framework ................................................................................................................................................................. 6

5.2.2 Force application system ............................................................................................................................................ 7

5.2.3 Mandrel ....................................................................................................................................................................................... 7

5.2.4 Specimen holder .................................................................................................................................................................. 7

5.2.5 Specimen securing clamp ........................................................................................................................................... 7

5.2.6 Blades ........................................................................................................................................................................................... 8

5.2.7 Blade holder ............................................................................................................................................................................ 9

5.2.8 Cutting-motion system ................................................................................................................................................. 9

5.2.9 Cut-stroke length measurement system ....................................................................................................... 9

5.3 Calibration .................................................................................................................................................................................................. 9

5.3.1 Beam Balancing Procedure ....................................................................................................................................... 9

5.3.2 Cutting speed adjustment ....................................................................................................................................... 10

5.3.3 Validation of blades ....................................................................................................................................................... 10

5.4 Test procedure ..................................................................................................................................................................................... 11

5.4.1 Specimen mounting ...................................................................................................................................................... 11

5.4.2 Test procedure for measuring the cut through distance ............................................................12

5.4.3 Test procedure for determining the calculated cutting force .................................................12

6 Test report ...............................................................................................................................................................................................................13

Annex A (informative) Inter-laboratory test data analysis ......................................................................................................14

Annex B (normative) Calculated cutting load determination ...............................................................................................15

Annex C (normative) Testing of the calibration material (see clause 5.3.3.1) .....................................................20

Bibliography .............................................................................................................................................................................................................................21

iii
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oSIST prEN ISO 13997:2022
ISO/DIS 13997:2022(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,

as well as information about ISO's adherence to the World Trade Organization (WTO) principles in the

Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.

The committee responsible for this document is ISO/TC 94, Personal safety — Protective clothing and

equipment, Subcommittee SC 13, Protective clothing and Technical Committee CEN/TC 162, Protective

clothing including hand and arm protection and lifejackets in collaboration.

This second edition cancels and replaces the first edition (ISO 13997:1999), which has been technically

revised.

This document has been completely rewritten based on the current practices and experience in cut

testing as well as comparing other cut test methods standards around the world. Following is a list of

changes from the previous edition of ISO 13997:
— new blades;
— new neoprene, with calibration data and Annex C;
— new sample carrier;
— new Figure 3;
— new data form ILT Annex A;
— new Annex B for calculation.
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oSIST prEN ISO 13997:2022
ISO/DIS 13997:2022(E)
Introduction

Although textiles, composites, leather, rubbers and reinforced materials may resist cutting by sharp

edges in different ways, a test method for evaluating the resistance to cut of materials in protective

clothing needs to be applicable to all materials. The test described in this International Standard

provides a method that allows calculations of the downwards (normal) force required to cause a blade

drawn across the sample for a fixed distance to cut through the specimen.

The performance of protective clothing materials may be classified using the numerical values obtained

from this test.
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oSIST prEN ISO 13997:2022
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oSIST prEN ISO 13997:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 13997:2022(E)
Protective clothing — Mechanical properties —
Determination of resistance to cutting by sharp objects
1 Scope

This International Standard specifies a tomodynamometer cut test method and related calculations, for

use on materials and assemblies designed for protective clothing, including gloves. The test determines

resistance to cutting by sharp edges, such as knives, sheet metal parts, swarf, glass, bladed tools and

castings.

When this document is cited as a test method in a material or product requirement standard, that

standard shall contain the necessary information to permit the application of ISO 13997 to the

particular product.

This test does not provide data on the resistance to penetration by pointed objects such as needles

and thorns, or the point of sharp-edged blades. The test described in this International Standard is

not considered suitable for testing materials made from chain mail and metal plates. The text of this

International Standard does not include provisions for the safeguard of the operator.

2 Normative reference

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 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties

ISO 34-1, Rubber, vulcanized or thermoplastic - Determination of tear strength - Part 1: Trouser, angle and

crescent test pieces

ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test

methods

ISO 48-2, Rubber, vulcanized or thermoplastic — Determination of hardness — Part 2: Hardness between

10 IRHD and 100 IRHD
ISO 2781, Rubber, vulcanized or thermoplastic — Determination of density
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 11610 and the following apply.

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 https:// www .electropedia .org
3.1
cut-through

event which has occurred when the blade edge first contacts the conducting material below the test

specimen
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oSIST prEN ISO 13997:2022
ISO/DIS 13997:2022(E)
3.2
cutting force

calculated force that would be required to be applied to a blade of standard sharpness to cut through a

material in a blade stroke of length 20 mm
3.3
cutting stroke length
distance the cutting-edge travels before cut-through occurs
4 Sampling
4.1 General

Unless otherwise specified, specimen dimensions shall not be less than 25 mm by 100 mm as this allows

up to 9 cuts on the same sample (see 5.2.4 and Figure 6). If this sample size is not possible, the smallest

specimen on which single cuts are made shall not be less than 25 mm by 25 mm.

NOTE the test requires more than 15 cuts therefore at least 2 specimens are necessary.

4.2 Textiles and other materials

Specimens shall be taken from regions of the sample product representative of the range of construction

present in protective areas or as defined in product requirement standard. In the case of an irregular

design, the test specimen shall be taken from the area where the least protection is expected.

Specimens from textile materials shall be prepared so that test cuts are made at an angle of (45 ± 5)°

to the warp and weft direction as defined in Figure 1. Only one result (cutting force see clause 5.4.4.2)

shall be reported.

Materials that have no clear orientation shall be tested in two directions at 45° to each other. 2 cutting

forces (see clause 5.4.4.2) shall be reported and the final result is the lowest one.

If the material is known to have homogenous properties in all directions, only one result (cutting force

see clause 5.4.4.2) shall be reported.

NOTE Materials that have no clear orientation are for example, unoriented materials, or those in which the

machine direction either does not exist or is uncertain such as some non-wovens.
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oSIST prEN ISO 13997:2022
ISO/DIS 13997:2022(E)
Dimensions in mm
Key
1 warp or longitudinal direction
2 weft or transversal direction
3 cut test direction
Figure 1 — Control specimen dimensions and cut direction for garments
4.3 Gloves

For gloves, take the specimen from the palm area cut on the bias such that the size of the specimen is

adequate but at an angle as close as possible to 45° as shown in Figure 2.

In the case of an irregular design of the palm, the test specimen shall be taken from the palm area

where the least protection is expected.

NOTE 1 If reinforcement(s) does not uniformly cover the palm area, either the specimen shall be taken without

reinforcement or the specimen shall be provided without reinforcement.

If cut protection is claimed for back of the hand or cuff and the materials are different from the palm,

they shall be tested and reported

NOTE 2 There is no tolerance to the angle for the glove as this depends on the size of the glove and its

construction to take the correct angle that best represents a 45° angle.
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oSIST prEN ISO 13997:2022
ISO/DIS 13997:2022(E)
Dimensions in mm
Key
1 cut test direction
Figure 2 — Glove samples and cut direction
4.4 Conditioning

Specimens shall be conditioned as defined in product requirement standard or in the following

conditioning atmosphere:
• Temperature (23 ± 2) °C and relative Humidity (50 ± 5) %.

Alternatively, the following conditioning should be used, and shall be reported in the test report.

• Temperature (20 ± 2) °C and relative Humidity (65 ± 5) %.

The period of conditioning is at least 24 h. Testing shall be carried out in the conditioning environment

or within 30 min of withdrawing the specimens from the conditioning environment.
5 Test method
5.1 Principle

The cut resistance of a material is its ability to resist being cut through by a blade. This is measured in a

machine in which a sharp blade is drawn across a specimen. The cuts are achieved in blade movements

of 5,0 mm to 50,0 mm length when a range of forces are applied to the blade normal to the specimen

surface. The cut resistance of a sample material is expressed as the cutting force that is required to be

applied to a blade of standard sharpness to just cut through the material in a 20,0 mm blade stroke. The

value of the cutting force may be used to classify materials.

The cut test apparatus consists of the following primary components (see Figure 3): blade holder (1)

with a straight line mechanism that holds a blade (2) a specimen (5) with a conductive strip (6) and

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oSIST prEN ISO 13997:2022
ISO/DIS 13997:2022(E)

double side mounting tape (7) mounted to a specimen holder (8) attached to the mandrel (9) to which

the force is applied.
Key
1 blade holder 7 mounting tape
2 blade 8 specimen holder
3 cutting edge of blade 9 mandrel
4 securing clamp 10 cut direction
5 specimen 11 applied force
6 conductive strip
Figure 3 — Schematic of the cut test principle

Any apparatus can be used that can maintain a constant force between the cutting edge and the

specimen and can accurately measure the distance the blade travels to cut through the specimen.

The testing apparatus shall also allow the test to be performed in the conditions specified in the test

method, for instance in terms of displacement rate of the blade and geometry of the sample holder (see

section 5.2).

Test apparatus may have limitations in testing materials with a thickness greater than 12 mm (see

5.2.7).

NOTE For each of the required measurements performed in accordance with this standard, a corresponding

estimate of the uncertainty of measurement should be evaluated. One of the following approaches shall be used:

[1]
• a statistical method, e.g. that given in ISO 5725-2 ;
[2]
• a mathematical method, e.g. that given in ISO/IEC Guide 98-3 ;
[3]
• uncertainty and conformity assessment as given in ISO/IEC Guide 98-4 ;
[4]
• JCGM 100:2008 .
5.2 Test apparatus

The apparatus shall have the following components (see Figure 4 for the general aspect of the cut

testing device).
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oSIST prEN ISO 13997:2022
ISO/DIS 13997:2022(E)
Key
1 motor and gearhead 5 specimen holder and securing 9 calibration weights
clamp
2 slide system 6 beam 10 loading/unloading handle
3 blade support/clamp 7 controller 11 level indicator
mechanism keypad with distance meter
4 blade 8 loading device 12 mandrel
Figure 4 — Example of apparatus

NOTE Keep the instrument free of dust and fibers. Don’t let lint accumulate on the guide rails and sharps.

5.2.1 Rigid framework

Rigid Framework that supports the constituent parts when a force of up to 200 N is exerted between

the cutting edge and the specimen.

1) An apparatus known as the tomodynamometer embodying these principles is available from a number

of suppliers such as: (1) TDM-100 from RGI Industrial Products, Inc., 755 Pierre Caisse, St-Jean-sur Richelieu,

Quebec, Canada J3B 7Y5 (www .rgicanada .com), (2) STM610 from SATRA, Wyndham Way, Telford Way, Kettering,

Northamptonshire, NN16 8SD, United Kingdom (www .satra .com), (3) LINEAR CUT RESISTANCE TESTER 3394B from

Mesdan, Via Masserino, 6 - 25080 Puegnago del Garda (BS) Italy (www .saviotechnologies .com), and (4) PROCOUPE

from EMI Developpement, Rue Alexandre Yersin, Zone Artisanale Coulmet, 10450 Breviandes France (www .emi

-developpement .com). This information is given for the convenience of user of this International Standard and does

not constitute an endorsement by ISO of this product. Equivalent products may be used if they can be shown to lead

to the same results.
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oSIST prEN ISO 13997:2022
ISO/DIS 13997:2022(E)
5.2.2 Force application system

Force application system to move the specimen holder towards the blade, or the blade towards the

specimen holder during operation of the machine such that the force between the cutting edge and the

specimen is constant ± 5 %.

The force shall be variable between 1,0 N and 200 N. The force may be applied to the blade holder or to

the specimen holder.
5.2.3 Mandrel

The mandrel is the part of the apparatus to which the specimen holder is fitted and allows it to be

positioned for the execution of the cut test.
5.2.4 Specimen holder

Specimen holder, with surface made of metal on which the specimen is mounted. The specimen

mounting area shall be curved with a radius of (38 ± 0,5) mm. The length of the mounting area shall be

greater than 110 mm and the width across the curvature shall be greater than or equal to 32 mm.

5.2.5 Specimen securing clamp

The specimen securing clamp is fitted to the specimen holder to secure the specimen in place during

the cut testing and avoid movement of the specimen (see Figure 5). The interior of the securing clamp

should not be a smooth surface to ensure that the specimen is held in place with minimum force.

The specimen securing clamp shall be either made of non-conductive material or insulated from

conductive samples, to avoid premature stop of the test.
Key
1 securing clamp
2 specimen holder
Figure 5 — Example of specimen holder and securing clamp

The mounting block shall have opening for the blades of 5,0 ± 0,3 mm and the distance between the

adjacent cut tests of the mounting device is 10 ± 1 mm. Screws shall be used to fasten slightly to put low

pressure on the specimen during the test to avoid movement.
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oSIST prEN ISO 13997:2022
ISO/DIS 13997:2022(E)
Dimensions in mm
Key
1 cut position
Distance between two cuts.
Free space for the blade.
Figure 6 — Detail of securing clamp cut positions

If a new blade inadvertently touches the mounting block, discard it and use a new one.

The use of the specimen securing clamp is optional and can be used if adequate clamping of the test

specimen cannot be achieved with the adhesive securing mechanism alone. The use of the securing

clamp may be useful for securing specimens comprising multiple layers which are not attached.

5.2.6 Blades
Blades, made of stainless steel with a hardness greater than 60 HRC.

Blades shall be (0,60 ± 0,05) mm thick, they shall have 2 facets and they shall be ground to a bevel

width of (1,6 ± 0,5) mm along a straight edge. This results in an included angle from the blade center of

approximately (11,3 ± 3)° at the bevel of the cutting edge. Blades shall have a cutting-edge length equal

or greater than 65 mm manufacturers length (70 ± 0,2) mm but kept at 65mm and blades shall be equal

or greater than 18 mm wide manufacturers width (19,7 ± 0,15) mm but kept at 18 mm. The blade is

described in Figure 7. Blade shall pass the validation procedure in 5.3.3.2.

2) FEATHER Safety Razor Co., Ltd, Address: 1-7-5, MIYAGAWA-CHO, SEKI CITY, GIFU 501-3912, JAPAN, Phone:

81-575-22-1315 (website: www .feather .co .jp) Product: No. 99727 This information is given for the convenience

of users of this International Standard, and does not constitute an endorsement by ISO of this product. Equivalent

products may be used if they can be shown to lead to the same results.
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oSIST prEN ISO 13997:2022
ISO/DIS 13997:2022(E)
Dimensions in mm
a) blade design b) Example of blade c) Example of blade
profile (normative) profile – blade edge
(normative)
Figure 7 — Examples of blade design

The finishing of the blade (deburring) shall be done in a way that the blade is homogeneous (same

cutting property) in both direction.
5.2.7 Blade holder

Blade holder, capable of holding the blade rigidly and with minimum distortion so that (12,0 ± 0,5) mm

of the blade width is exposed.

The blade shall be held so that it is orientated across the curvature of the specimen holder with the

plane of the blade at (90 ± 2)° to the long axis of the specimen holder.
5.2.8 Cutting-motion system

Cutting-motion system to move the specimen holder and cutting edge relative to each other such that

the cutting edge moves across the specimen at (90 ± 2)° to the long axis of the specimen holder at a

velocity of (2,5 ± 0,5) mm/s.

A screw-thread drive system has been found satisfactory. The bearings in the system shall provide

smooth movement with restricted lateral motion. The maximum transverse movement of the cutting

edge when it is stationary and not in contact with a specimen shall be 0,5 mm when a force of

(5,0 ± 0,5) N is applied alternately to the two sides of the blade at (90 ± 5)° to the long axis of the blade.

5.2.9 Cut-stroke length measurement system

Cut-stroke length measurement system, to measure the length of the cutting edge that is drawn across

the specimen to completely cut through it, accurate to 0,1 mm.

The distance to be measured is the blade movement from its initial stationary position in contact with

the specimen to the point at which cut-through occurs and the first electrical contact between the blade

and the specimen holder takes place.
5.3 Calibration
5.3.1 Beam Balancing Procedure
Follow the following procedure:
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oSIST prEN ISO 13997:2022
ISO/DIS 13997:2022(E)

(1) Check and adjust if needed the alignment of the equipment by levelling the bubbles (as shown in

Figure 4, key 11).
(2) Remove any load from the platform.

NOTE For machines that were not designed originally with the securing clamp, a compensation load may be

necessary to maintain the neutral position.
(3) Remove any sample or tape from the specimen holder. Mount the
...