SIST EN ISO 4612:2000

SLOVENSKI STANDARD
SIST EN ISO 4612:2000
01-maj-2000
Polimerni materiali - Priprava preskusnih PVC past - Metoda z mešalnikom
(planetary mixer) (ISO 4612:1999)
Plastics - Preparation of PVC pastes for test purposes - Planetary-mixer method (ISO
4612:1999)
Kunststoffe - Herstellung von PVC-Pasten für Prüfzwecke - Planetenmischeverfahren
(ISO 4612:1999)
Plastiques - Préparation des pâtes PVC pour essais - Méthodes utilisant un mélangeur
planétaire (ISO 4612:1999)
Ta slovenski standard je istoveten z: EN ISO 4612:1999
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
83.080.20 Plastomeri Thermoplastic materials
SIST EN ISO 4612:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 4612:2000

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SIST EN ISO 4612:2000

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SIST EN ISO 4612:2000

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SIST EN ISO 4612:2000

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SIST EN ISO 4612:2000

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SIST EN ISO 4612:2000
INTERNATIONAL ISO
STANDARD 4612
Second edition
1999-08-15
Plastics — Preparation of PVC pastes for
test purposes — Planetary-mixer method
Plastiques — Préparation des pâtes PVC pour essais — Méthode utilisant
un mélangeur planétaire
A
Reference number
ISO 4612:1999(E)

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SIST EN ISO 4612:2000
ISO 4612:1999(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.
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.
International Standard ISO 4612 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9,
Thermoplastic materials.
This second edition cancels and replaces the first edition (ISO 4612:1979), which has been modified to make it
suitable for the preparation of pastes of various compositions and to include different types of planetary mixer.
©  ISO 1999
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
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SIST EN ISO 4612:2000
INTERNATIONAL STANDARD  © ISO ISO 4612:1999(E)
Plastics — Preparation of PVC pastes for test purposes —
Planetary-mixer method
1 Scope
This International Standard specifies two methods, A and B, for the preparation of pastes (also known as plastisols)
from appropriate PVC resins, plasticizers and other ingredients using a planetary mixing process.
Both method A and method B can be used to prepare pastes of any composition. Method A (single-speed) is
particularly applicable to resins prone to heat build-up during paste preparation, while method B (two-speed) might
be preferred for repetitive work, e.g. for process control during resin manufacture, because of its shorter mixing
time.
Such pastes may be used for a variety of test purposes, including the determination of rheological properties for
resin designation and specification.
2 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments or revisions apply. However, parties to
agreements based on this International Standard are encouraged to investigate the possibility of applying the most
recent edition of the normative document indicated below. For undated references, the latest edition of the
normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International
Standards.
ISO 291:1997, Plastics — Standard atmospheres for conditioning and testing.
3 Terms and definitions
For the purposes of this International Standard, the following terms and definitions apply.
3.1
paste
plastisol
a homogeneous dispersion of PVC resin in an organic liquid
3.2
planetary mixer
a mixer in which the beater or stirrer not only rotates about an axis within the mixing vessel, but the axis of rotation
itself also describes a circular path
4 Principle
Liquid plasticizer, PVC resin powder and other appropriate ingredients, in liquid, paste or powder form, are
combined in a mixer where the shearing action causes the powder(s) to disperse in the liquid(s).
The paste-making process involves the partial solvation of the resin powder by the plasticizer, and hence the
"dispersion" will remain in liquid form for prolonged periods, i.e. the powder does not readily settle out.
1

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SIST EN ISO 4612:2000
© ISO
ISO 4612:1999(E)
5 Apparatus and materials
5.1  Planetary mixer, having at least the key features shown in Figure 1, and with a mixing-bowl/beater
configuration similar to one of those illustrated in Figure 2.
The mixing bowl shall be made of stainless steel and may be fitted with a jacket for the circulation of cooling water.
The bowl will have a recommended filling level, stated by the manufacturer. This shall allow the efficient mixing of
700 g to 1200 g of charge, made up of the relevant proportions of resin, plasticizer and any other ingredients.
The motor specified shall have sufficient power to maintain the speed of rotation of the beater around the axis of the
–1 –1 –1 –1
bowl at 60 min ± 5 min and additionally, if method B is used, at 120 min ± 10 min with the most viscous
paste that it is intended to mix. There will be a fixed relationship between the speed of rotation of the beater around
the axis of the bowl and the speed of rotation of the beater around its own axis that will have been set by the
manufacturer of the particular mixer. It shall approximate to the ratio 3:7, i.e. when the speed of rotation of the
–1
beater around the axis of the bowl is set at 60 min , the speed of rotation around its own axis will be approximately
–1
140 min .
The mixer may be provided with a rotating wiper to scrape the inside of the bowl with a blade made of a material
that is resistant to the liquid(s) used to make the paste.
The mixer may also have facilities for applying a vacuum to the contents of the bowl
...