EN ISO 1600:1999
(Main)Plastics - Cellulose acetate - Determination of light absorption on moulded specimens produced using different periods of heating (ISO 1600:1990)
Plastics - Cellulose acetate - Determination of light absorption on moulded specimens produced using different periods of heating (ISO 1600:1990)
This method is intended for cellulose acetate having an acetic acid yield of 54 % ± 2.5 %. It may also be applicable to other transparent plastics which are not strongly coloured and which can be moulded under the specified conditions. Two measurements of absorption, one at the red end and one at the blue end of the visible spectrum, are sufficient to characterize the absorption of light by the material. Describes the preparation of the material, two methods for the incorporation of plasticizers and die moulding of the test specimen. For the determination of the initial optical density, specimens given the smallest practicable amount of heating are used. The optical density at 25 mm thickness is calculated as the initial light absorption. The light absorption after further heating is obtained by similar measurements on specimens prepared using a longer period of heating during moulding.
Kunststoffe - Celluloseacetat - Bestimmung der Lichtabsorption an gepreßten Probekörpern, hergestellt bei unterschiedlichen Erwärmungszeiten (ISO 1600:1990)
Diese Internationale Norm legt ein Verfahren zur Bestimmung der Lichtabsorption von Celluloseacetat fest; dabei werden Probekörper aus zwei Pressungen unter Anwendung unterschiedlicher Erwärmungßeiten verwendet. Ziel ist es, quantitative Messungen zur Verfügung zu stellen, die mit der Beurteilung der Gelbheit und Durchsichtigkeit und von Veränderungen dieser Eigenschaften nach dem Formpressen durch die Sichtprüfung vereinbar sind.
Plastiques - Acétate de cellulose - Détermination de l'absorption de lumière sur éprouvettes moulées produites en utilisant différentes périodes de chauffage (ISO 1600:1990)
La présente Norme internationale prescrit une méthode pour la détermination de l'absorption de lumière par l'acétate de cellulose, en employant des éprouvettes prélevées dans deux objets moulés qui ont été produits en adoptant différentes périodes de chauffage. Le but de cette méthode est d'obtenir des mesures quantitatives, compatibles avec lappréciation visuelle, du jaunissement et de la clarté, et de la variation de ces propriétés lors du moulage. Les déterminations sont effectuées sur de l'acétate de cellulose sous forme plastifiée plutôt qu'en solution, afin d'obtenir un guide plus sûr de son comportement dans les :matières plastiques. La méthode réduit au minimum les effets dus au trouble ou aux imperfections des éprouvettes. Elle convient aux acétates de cellulose ayant un titre en acide acétique de 54 % à + ou - 2,5 %. Elle peut aussi être applicable à d'autres plastiques transparents et peu colorés, qui peuvent être moulés dans les conditions prescrites.
Polimerni materiali - Acetat celuloze - Določanje absorpcije svetlobe oblikovancev, pripravljenih z različno dolgim segrevanjem (ISO 1600:1990)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 1600:2000
01-maj-2000
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Plastics - Cellulose acetate - Determination of light absorption on moulded specimens
produced using different periods of heating (ISO 1600:1990)
Kunststoffe - Celluloseacetat - Bestimmung der Lichtabsorption an gepreßten
Probekörpern, hergestellt bei unterschiedlichen Erwärmungszeiten (ISO 1600:1990)
Plastiques - Acétate de cellulose - Détermination de l'absorption de lumiere sur
éprouvettes moulées produites en utilisant différentes périodes de chauffage (ISO
1600:1990)
Ta slovenski standard je istoveten z: EN ISO 1600:1999
ICS:
83.080.20 Plastomeri Thermoplastic materials
SIST EN ISO 1600:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 1600:2000
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SIST EN ISO 1600:2000
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SIST EN ISO 1600:2000
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SIST EN ISO 1600:2000
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SIST EN ISO 1600:2000
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SIST EN ISO 1600:2000
INTERNATIONAL
STANDARD 1600
Second edi tion
1990-12-0 1
Plastics - Cellulose acetate - Determination
of light absorption on moulded specimens
produced using different periods of heating
Plastiques - Acetate de cellulose - Determination de I’absorption de
lumiere SW- eprouvettes moukes produites en utilisant differentes
pkiodes de chauffage
--
Reference number
ISO 1600: 199O(E)
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SIST EN ISO 1600:2000
ISO 1600:1990(E)
Foreword
ISO (the international Organ‘ization 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. Esch 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. ISO 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 ISO 1600 was prepared by Technical Committee
ISO/TC 61, Plastics.
This second edition cancels and replaces the h-st edition
(ISO 1600:1975), of which it constitutes a minor technical revision.
0 ISO 1990
All rights reserved. No part of this publication may be reproduced or utilized in any form
or by any means, electronie or mechanical, including photocopying and microfilm, without
Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 * Switzerland
Printed in Switzerland
ii
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SIST EN ISO 1600:2000
ISO 1600:1990(E)
INTERNATIONAL STANDARD
Plastics - Cellulose acetate - Determination of light
absorption on moulded specimens produced using different
periods of heating
WARNING - The use of this International Standard may involve hazardous materials, operations and
equipment. This Standard does not purport to address all of the safety Problems associated with its use.
lt is the responsibility of the user of this Standard to establish appropriate safety and health practices
and determine the applicability of regulatory limitations Prior to use.
are encouraged to investigate the possibility of ap-
1 Scope
plying the most recent editions of the Standards in-
dicated below. Members of IEC and ISO maintain
This International Standard specifies a method for
registers of currently valid International Standards,
the determination of light absorption of cellulose
acetate, employing test specimens taken from two
ISO 5653990, Test sieves - Metal wire cloth, perfo-
mouldings which have been produced using differ-
rated metal plate and electroformed sheet - Nominal
ent periods of heating.
sizes of openings.
The aim is to provide quantitative measurements
which are compatible with visual judgements of ISO 585: 1 9901), Plastics - Unplas ticized cellulose
acetate - Determination of moisture content.
yellowness and lightness, and of changes in these
properties after moulding. The determinations are
carried out on cellulose acetate in plasticized form
rather than in solution, since a more reliable guide
3 Princi
...
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