SIST EN ISO 7823-1:2000

SLOVENSKI STANDARD
SIST EN ISO 7823-1:2000
01-maj-2000
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Poly (methyl methacrylate) sheets - Types, dimensions and characteristics - Part 1: Cast
sheets (ISO 7823-1:1991)
Tafeln aus Polymethylmethacrylat - Typen, Maße und Eigenschaften - Teil 1: Gegossene
Tafeln (ISO 7823-1:1991)
Plaques en poly (méthacrylate de méthyle) - Types, dimensions et caractéristiques -
Partie 1: Plaques coulées (ISO 7823-1:1991)
Ta slovenski standard je istoveten z: EN ISO 7823-1:1996
ICS:
83.140.10 Filmi in folije Films and sheets
SIST EN ISO 7823-1:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 7823-1:2000

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SIST EN ISO 7823-1:2000

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SIST EN ISO 7823-1:2000

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SIST EN ISO 7823-1:2000
IS0
INTER NATIONAL
7823-1
STANDARD
Second edition
1991-1 1-15
Poly(methy1 methacrylate) sheets - Types,
dimensions and characteristics -
Part 1:
Cast sheets
Types, dimensions et
Plaques en po/y(rnétliacry/ate de méfhyie)
caracteristiques -
Pariie I: Plaques coulées
Reference number
IS0 7823-1:1991(E)

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SIST EN ISO 7823-1:2000
IS0 7823-1:1991(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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, govern-
mental and non-governmental, in liaison with ISO, also take part in the
work. IS0 collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an lnter-
national Standard requires approval by at least 75% of the member
bodies casting a vote.
International Standard IS0 7823-1 was prepared by Technical Committee
ISO/TC 61, Plasfics, Sub-committee SC 11, Products.
This second edition cancels and replaces the first edition (IS0
7823-1:1987), of which it constitutes a technical revision.
IS0 7823 consists of the following parts, IJnder the general title
Poly(methy1 methacrylate) sheets - Types, dimensions and character-
istics:
- Part I: Cast sheets
- Part 2: Melt-calendered exfruded slieets
Annex A forms an integral part of this part of IS0 7823.
6 IS0 1991
All rights reserved. No part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopylng and nilcrofilm, without
permission In writing from the publisher.
International Organization for Standardization
Case Postale 56 CH-1211 Genève 20 Switzerland
Printed in Switzerland
ii

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SIST EN ISO 7823-1:2000
INTERNATIONAL STANDARD IS0 7823-1:1991(E)
Poly(methy1 methacrylate) sheets
- Types, dimensions and
characteristics -
Part 1:
Cast sheets
IS0 306: 1987, Plastics - Thermoplastic materials -
i Scope
Determination of Vicat softening temperature.
1.1 This part of IS0 7823 specifies requirements for
IS0 489:1983, Plastics - Determinafion of the
non-modified flat poly(methy1 methacrylate) (PMMA)
refractive index of transparent plastics.
cast sheets (plates and continuous) for general-
purpose use. The sheets may be colourless or col-
ISO/R 527:1966, Plastics - Determination of tensile
oured, and transparent, translucent or opaque.
properties.
IS0 1183:1987, Plastics - Methods for determining
1.2 The thickness range of the sheets covered by
the density and relative density of non-cellular plaç-
this part of IS0 7823 is 1,s mm to 25 mm.
tics.
IS0 2039-2: 1987, Plastics - Determination of hard-
2 Normative references
ness - Part 2: Rockwell hardness.
The following standards contain provisions which,
IS0 2818:19RO, Plasfics - Preparation of test speci-
through reference in this text, constitute provisions
mens by machining.
of this part of IS0 7823. At the time of publication,
0 the editions indicated were valid. All standards are
IS0 2859-1 : 1989, Sampling procedures forinspection
subject to revision, and parties to agreements based
by attributes - Part I: Sampling plans indexed by
on this part of IS0 7823 are encouraged to investi-
accepfable quality level (AQL) for lot-by-lot in-
gate the possibility of applying the most recent edi-
spec f ion.
tions of the standards indicated below. Members of
IEC and IS0 maintain registers of ciirrently valid
IS0 4582:1980, Plastics - Determination of changes
International Standards.
in colour and variations in properties after exposure
to daylight under glass, natural weathering or arti-
IS0 62:1980, Plastics - Determination of water ab-
ficial light.
sorption.
IS0 4607:1978, Plastics - Methods of exposure to
IS0 75:1987, Plastics and ebonite - Defermination
natural weathering.
of temperature of deflection under load.
IS0 4892:1981, Plastics - Methods of exposure to
IS0 178:1975, Plastics - Defermination of flexural
laboratory light sources.
properties of rigid plastics.
EN 2155-5:1989, Aerospace series - Test methods
IS0 179:1982, Plastics - Determinafion of Charpy
for transparent materials for aircraft glazing - Part
impact strength of rigid materials.
5: Determination of visible light transmission.
IS0 291:1977, Plastics - Standard atmospheres for
conditioning and testing.
1

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SIST EN ISO 7823-1:2000
IS0 7823-1:1991(€)
EN 2155-9:1989, Aerospace series - Test methods 5.2 Appearance
for transparent materials for aircrafi glazing - Part
9: Determination of haze.
5.2.1 Surface defects
EN 2155-12:-,1) Aerospace series - Test methods for
The sheet shall have a smooth surface. There shall
transparent materials for aircraft glazing - Parf 12:
be no suriace defects, scratches or marks larger
Determination of coefficient of linear fhermal expan-
than 3 mm each anywhere on the sheet.
sion.
5.2.2 Inclusion defects
There shall be no bubbles, inclusions, cracks or
3 Definitions
other defects, that could adversely affect the per-
formance of the sheet in its intended application,
For the purposes of this part of IS0 7823, the follow-
larger than 3 mm2 each anywhere in the sheet.
ing definitions apply.
3.1 non-modified cast PMMA sheets: Sheets based 5.2.3 Classification
on homopolymers of MMA, or copolymers of MMA
with acrylic or methacrylic monomers, produced by The area of any defect found in the sheet shall be
bulk polymerization in the presence of suitable in- classified as specified in table 1. Each defect shall
itiators. be considered separately.
3.2 flat PMMA sheets: Sheets with substantially
Table 1 - Classification of defects
parallel plane surfaces.
Areas in sauare millimetres
IzqRre>$;;face I Area of inclusion I
defects
I
Negligible Less than 1 Less than 1
4 Composition
I Acceptable I 1 to 3 1 to 3
4.1 Plasticizing ingredients (materials that do not
undergo chemical reaction to become a part of the
5.2.4 Defect distribution
polymer), other monomers and crosslinking agents
(materials that produce the links between the chains
5.2.4.1 There shall not be a significant number (for
of polymers) shall be present in amounts that do not
the application) of small defects, each particle of
change the basic properties from the values given
which is defined as “negligible” in tablel, within
in table3. These amounts are in most cases less
1 m2 anywhere in the sheet.
than 3 % (mlm).
fm
5.2.4.2 No defect defined as “acceptable” in 0
table 1 shall be within 500 mm of another “accept-
4.2 Other additives, e.g. colorants, UV absorbers,
able” defect anywhere in or on the sheet.
pigments, may be included to achieve specific
properties.
5.3 Colour
Unless otherwise specified, colour distribution shall
5 General requirements
be homogeneous. Admissible variation shall be
agreed between the interested parties.
5.1 Protective coverings
5.4 Dimensions
Unless otherwise agreed between the interested
parties, the surfaces of the sheet, as delivered, shall
5.4.1 Length and width
be protected by a suitable material, for example
kraft paper secured with a water-soluble or
The length and width of the sheets shall be agreed
pressure-sensitive adhesive which allows the pro-
between the interested parties. The tolerances shall
tective material to be readily removed without sur-
be as specified in table2.
face contamination or damage, or polyethylene film.
1) To be published.
2

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SIST EN ISO 7823-1:2000
IS0 7823-1:1991(E)
5.4.3 Tolerances for other sizes
Table 2 - Tolerances on length and width
Dimensions in millimetres (unless staled otherwise)
Tolerances for sheet sizes and thicknesses outside
the above ranges shall be agreed between the in-
Length or width Tolerance
I
terested parties.
5.4.4 Conditions of measurement
Measurement of the dimensions of the
...