EN ISO 8257-2:2006

SLOVENSKI STANDARD
01-julij-2006
Polimerni materiali - Materiali na osnovi polimetilmetakrilata (PMMA) za
oblikovanje in ekstrudiranje – 2. del: Priprava preskušancev in ugotavljanje
lastnosti (ISO 8257-2:2001)
Plastics - Poly(methyl methacrylate) (PMMA) moulding and extrusion materials - Part 2:
Preparation of test specimens and determination of properties (ISO 8257-2:2001)
Kunststoffe - Polymethylmethacrylat (PMMA)-Formmassen - Teil 2: Herstellung von
Probekörpern und Bestimmung der Eigenschaften (ISO 8257-2:2001)
Plastiques - Poly(méthacrylate de méthyle) (PMMA) pour moulage et extrusion - Partie 2:
Préparation des éprouvettes et détermination des propriétés (ISO 8257-2:2001)
Ta slovenski standard je istoveten z: EN ISO 8257-2:2006
ICS:
83.080.20
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 8257-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2006
ICS 83.080.20
English Version
Plastics - Poly(methyl methacrylate) (PMMA) moulding and
extrusion materials - Part 2: Preparation of test specimens and
determination of properties (ISO 8257-2:2001)
Plastiques - Poly(méthacrylate de méthyle) (PMMA) pour Kunststoffe - Polymethylmethacrylat (PMMA)-Formmassen
moulage et extrusion - Partie 2: Préparation des - Teil 2: Herstellung von Probekörpern und Bestimmung der
éprouvettes et détermination des propriétés (ISO 8257- Eigenschaften (ISO 8257-2:2001)
2:2001)
This European Standard was approved by CEN on 16 March 2006.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8257-2:2006: E
worldwide for CEN national Members.

Foreword
The text of ISO 8257-2:2001 has been prepared by Technical Committee ISO/TC 61 "Plastics”
of the International Organization for Standardization (ISO) and has been taken over as EN ISO
8257-2:2006 by Technical Committee CEN/TC 249 "Plastics", the secretariat of which is held by
IBN.
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 October 2006, and conflicting national
standards shall be withdrawn at the latest by October 2006.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Endorsement notice
The text of ISO 8257-2:2001 has been approved by CEN as EN ISO 8257-2:2006 without any
modifications.
INTERNATIONAL ISO
STANDARD 8257-2
Second edition
2001-12-15
Corrected version
2003-11-01
Plastics — Poly(methyl methacrylate)
(PMMA) moulding and extrusion
materials —
Part 2:
Preparation of test specimens and
determination of properties
Plastiques — Poly(méthacrylate de méthyle) (PMMA) pour moulage et
extrusion —
Partie 2: Préparation des éprouvettes et détermination des propriétés

Reference number
ISO 8257-2:2001(E)
ISO 8257-2:2001(E)
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©
ii ISO 2001 – All rights reserved

ISO 8257-2:2001(E)
Contents Page
1 Scope . 1
2 Conformance . 1
3 Normative references . 1
4 Preparation of test specimens . 2
5 Conditioning . 4
6 Determination of properties . 5
©
ISO 2001 – All rights reserved iii

ISO 8257-2:2001(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 com-
mittees. 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 liai-
son with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this part of ISO 8257 may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 8257-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9,
Thermoplastic materials.
This second edition cancels and replaces the first edition (ISO 8257-2:1990), which has been technically revised.
ISO 8257 consists of the following parts, under the general title Plastics — Poly(methyl methacrylate) (PMMA)
moulding and extrusion materials:
— Part 1: Designation system and basis for specifications
— Part 2: Preparation of test specimens and determination of properties
In this corrected version of ISO 8257-2:2001, Table 3 has been amended to remove the meaningless “less than” ()<
signs in the dimensions of the specimens for Charpy unnotched impact strength, Charpy notched impact strength
and temperature of deflection under load (sixth, seventh and eighth properties in table).
©
iv ISO 2001 – All rights reserved

INTERNATIONAL STANDARD ISO 8257-2:2001(E)
Plastics — Poly(methyl methacrylate) (PMMA) moulding and
extrusion materials —
Part 2:
Preparation of test specimens and determination of properties
1 Scope
1.1 This part of ISO 8257 specifies procedures for moulding test specimens of PMMA materials in a specified state,
and methods for measuring their properties. Any property listed in this part of ISO 8257 and referred to in combina-
tion with ISO 8257-1 shall be determined by the method referred to in this part of ISO 8257.
1.2 No values are quoted for these properties. Those required for the designation of PMMA materials for moulding
and extrusion are given in ISO 8257-1. Other properties shall be determined by the appropriate methods referred to
in this part of ISO 8257.
1.3 The values determined in accordance with this part of ISO 8257 will not necessarily be identical to those ob-
tained using specimens of different dimensions and/or prepared by different procedures. They may also be influ-
enced by colorants and other additives. The values obtained for the properties of a moulding depend on the moulding
compound, the shape of test specimen, the test method and the state of anisotropy. The last-mentioned depends on
the gating and the moulding conditions, for example temperature, pressure or injection rate. Any subsequent treat-
ment must also be considered, for example conditioning or annealing.
1.4 The thermal history and the internal stresses of the specimens may strongly influence thermal and mechanical
properties and resistance to environmental stress cracking, but exert less effect on the electrical properties, which
mainly depend on the chemical composition of the mou
...