prEN ISO 877-2

SLOVENSKI STANDARD
01-oktober-2016
Polimerni materiali - Metode izpostavitve vremenskim vplivom - 2. del: Vremenski
vplivi z dnevno svetlobo, filtrirano skozi steklo (ISO/DIS 877-2:2016)
Plastics - Methods of exposure to solar radiation - Part 2: Direct weathering and
exposure behind window glass (ISO/DIS 877-2:2016)
Kunststoffe - Freibewitterung - Teil 2: Bewitterung und Bestrahlen hinter Fensterglas
(ISO/DIS 877-2:2016)
Plastiques - Méthodes d'exposition au rayonnement solaire - Partie 2: Exposition directe
et exposition derrière une vitre en verre (ISO/DIS 877-2:2016)
Ta slovenski standard je istoveten z: prEN ISO 877-2
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT INTERNATIONAL STANDARD
ISO/DIS 877-2
ISO/TC 61/SC 6 Secretariat: DIN
Voting begins on: Voting terminates on:
2016-08-03 2016-10-25
Plastics — Methods of exposure to solar radiation —
Part 2:
Direct weathering and exposure behind window glass
Plastiques — Méthodes d’exposition au rayonnement solaire —
Partie 2: Exposition directe et exposition derrière une vitre en verre
ICS: 83.080.01
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ISO/DIS 877-2:2016(E)
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PROVIDE SUPPORTING DOCUMENTATION. ISO 2016

ISO/DIS 877-2:2016(E)
© ISO 2016, Published in Switzerland
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ii © ISO 2016 – All rights reserved

ISO/DIS 877-2:2016(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Apparatus . 1
4.1 General requirements . 1
4.2 Test fixture for exposures using method A . 1
4.3 Test fixture for exposures using method B . 2
4.4 Apparatus for measurement of climatic factors . 3
5 Test specimens. 3
6 Conditions of exposure of the test specimens . 4
6.1 Exposure aspect . 4
6.2 Exposure site . 4
7 Exposure stages . 4
7.1 General . 4
7.2 Duration of exposure . 4
7.3 Solar radiant exposure . 4
8 Procedure. 5
8.1 Mounting of test specimens . 5
8.1.1 General. 5
8.1.2 Method A . 5
8.1.3 Method B . 5
8.2 Mounting of reference materials (if used) . 5
8.3 Climatic observations . 5
8.4 Exposure of test specimens . 5
8.4.1 General. 5
8.4.2 Method A . 5
8.4.3 Method B . 5
8.5 Determination of changes in properties . 5
9 Expression of results . 6
9.1 Determination of changes in properties . 6
9.2 Climatic conditions . 6
10 Test report . 6
ISO/DIS 877-2:2016(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 61/SC 6.
This second edition cancels and replaces the first edition (ISO 877-2:2009), which has been technically
revised.
ISO 877 consists of the following parts.
— Part 1: General guidance
— Part 2: Direct weathering and exposure behind window glass
— Part 3: Intensified weathering using concentrated solar radiation
iv © ISO 2016 – All rights reserved

DRAFT INTERNATIONAL STANDARD ISO/DIS 877-2:2016(E)
Plastics — Methods of exposure to solar radiation —
Part 2:
Direct weathering and exposure behind window glass
1 Scope
This part of ISO 877 specifies a method for the direct exposure of plastics to solar radiation (method A)
and a method for the exposure of plastics to glass-filtered solar radiation (exposure behind window
glass) (method B). The purpose is to assess property changes produced after specified stages of such
exposures. General guidance concerning the scope of ISO 877 is given in ISO/DIS 877-1:2016, Clause 1.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO/DIS 877-1:2016, Plastics — Methods of exposure to solar radiation — Part 1: General guidance
ISO 4582, Plastics — Determination of changes in colour and variations in properties after exposure to
daylight under glass, natural weathering or laboratory light sources
ASTM G 24, Standard Practice for Conducting Exposures to Daylight Filtered Through Glass
3 Principle
General guidance is given in ISO/DIS 877-1:2016, Clause 4.
4 Apparatus
4.1 General requirements
Refer to ISO 877-1:2016, 5.1, for general requirements.
When installed, the racks employed in test methods A and B shall be capable of providing the desired
angle of inclination (see 6.1) and shall be such that no portion of any test specimen is closer than 0,5 m
to the ground or to any other obstruction. Specimens may be mounted directly on the rack or in suitable
holders which are then affixed to the rack. Mounting fixtures shall be secure, but shall apply as little
stress as possible to the specimens and shall permit shrinkage, expansion or warping to occur without
constraint, as far as possible.
In some cases, the object to be exposed is intended to be in direct contact with the ground (e.g. when
entire vehicles are exposed). In these cases, the requirements for minimum distance between the
specimens and the ground do not apply.
4.2 Test fixture for exposures using method A
The design of the specimen rack shall be suited to the types of specimen being exposed, but for many
purposes a flat frame mounted on a support is suitable. The materials used to construct the frame shall
conform to the requirements given in ISO 877-1:2016, 5.1. All materials used for the test fixture shall be
corrosion-resistant without the need for surface treatment. Aluminium alloys 6061T6 and 6063T6 and
ISO/DIS 877-2:2016(E)
stainless steel have been found suitable for u
...