SIST EN 14932:2025

SLOVENSKI STANDARD
01-september-2025
Polimerni materiali - Raztegljive plastomerne folije za zavijanje v bale
Plastics - Thermoplastic stretch films for wrapping silage bales
Kunststoffe - Thermoplastische Stretchfolien zum Umwickeln von Silage-Ballen
Plastiques - Films thermoplastiques étirables pour l'enrubannage de balles d'ensilage
Ta slovenski standard je istoveten z: EN 14932:2025
ICS:
55.040 Materiali in pripomočki za Packaging materials and
pakiranje accessories
83.140.10 Filmi in folije Films and sheets
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 14932
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2025
EUROPÄISCHE NORM
ICS 55.040; 83.140.10 Supersedes EN 14932:2018
English Version
Plastics - Thermoplastic stretch films for wrapping silage
bales
Plastiques - Films thermoplastiques étirables pour Kunststoffe - Thermoplastische Stretchfolien zum
l'enrubannage de balles d'ensilage Umwickeln von Silage-Ballen
This European Standard was approved by CEN on 16 June 2025.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14932:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Materials . 9
5 Solar reflectance . 10
6 Durability . 10
7 Requirements . 10
7.1 General requirements . 10
7.2 Requirement for visual inspection . 12
7.2.1 General. 12
7.2.2 Adhesion . 12
8 Test methods . 12
8.1 Determination of film thickness . 12
8.1.1 Determination of single point thickness . 12
8.1.2 Determination of average thickness . 12
8.2 Determination of width . 13
8.3 Determination of core protrusion . 13
8.4 Determination of film length . 13
8.5 Determination of neck-in during film stretching . 14
8.6 Determination of tensile characteristics . 14
8.7 Determination of impact resistance . 14
8.8 Determination of the tightening force . 15
8.9 Determination of the tear resistance. 15
8.10 Determination of total luminous transmittance . 15
8.11 Determination of resistance to weathering . 15
8.11.1 Principle . 15
8.11.2 Procedure . 15
8.11.3 Calculation and expression of results . 15
8.12 Determination of oxygen transmission rate . 16
9 Film acceptance, storage and handling . 16
9.1 Delivery control . 16
9.2 Storage and handling of rolls . 16
10 Designation . 16
11 Marking . 17
11.1 Marking of the film . 17
11.2 Marking on the packaging or label . 17
12 Instructions for installation and use of silage stretch films . 17
13 Design for recycling and end of life of stretch films and mantle film/net replacement film
for wrapping silage bales . 18
14 Removal and collection instructions of used silage stretch films . 19
Annex A (informative) Exposure to other light sources . 20
Annex B (informative) Numerical correlation between durations of stretch forage films exposed
to artificial weathering and a natural exposure . 23
Annex C (normative) Determination of solar reflectance . 25
Annex D (normative) Determination of neck-in during stretching . 28
Annex E (normative) Determination of tightening force . 31
Annex F (informative) Determination of adhesion characteristic . 33
Bibliography . 38

European foreword
This document (EN 14932:2025) has been prepared by Technical Committee CEN/TC 249 “Plastics”, the
secretariat of which is held by SIS.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by January 2026, and conflicting national standards shall
be withdrawn at the latest by January 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 14932:2018.
— Clause 4 on materials has been extended;
— Clauses 10, 11 and 12 on designation, marking and instructions for installation and use of silage
stretch films, respectively, have been modified;
— Clause 13 on the design-for-recycling and end of life of stretch films for wrapping silage bales has
been added;
— Clause 14 on removal and collection instructions of used silage stretch films has been modified,
referring to EN 18109 for additional information;
— the informative Annex F on the determination of oxygen permeability and airtightness on an artificial
bale, and the informative Annex H on guidance for use and disposal of stretch films, of the previous
edition, have been deleted;
— the informative Annex G on the determination of adhesion characteristic has been modified to
become normative Annex E on the determination of tightening force.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
The biological and practical requirements for silage stretch films and the interactions with the machinery,
used for the wrapping and handling of round bales and square bales, have been considered for the design
of this document. However, it is difficult to simulate in laboratory conditions some parameters like leak
tightness, oxygen permeability, temperature and the manner they interact.
In order to obtain silage of high quality it is essential to reduce unwanted microbiological activities to
very low levels. It is necessary to limit the penetration of oxygen of air inside the bale in order to create
the best conditions for conservation. Consequently, the wrapped bale should be as gas tight as possible.
There are discussions regarding how the temperature inside the bale will influence how different types
of “good” and “bad” microbiological activities will develop in forage. Although the film can be made of any
colour, it is a fact that the pigmentation or colour itself will influence the temperature inside the bale, due
to sun-radiation. Therefore, this document also includes a method for the determination of the solar
reflectance of stretch films [1].
This document defines the criteria for design for recycling of silage stretch films.
End-of-life management is not covered in this document, as it is under the scope of EN 18109:2025 Clause
4 and 5.
1 Scope
This document specifies the requirements for dimensional, mechanical, oxygen transmission rate and
optical characteristics of thermoplastic stretch films for wrapping bales used for ensiling of forage. It
specifies a measurement for solar reflectance of the films.
This document specifies also test methods t
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