ISO 20927:2019
(Main)Rubber compounding ingredients — Precipitated silica — Determination of aggregate size distribution by disc centrifuge
Rubber compounding ingredients — Precipitated silica — Determination of aggregate size distribution by disc centrifuge
This document specifies a general method for determining the aggregate size distribution (ASD) of silica by using a disc centrifuge according to the principle of sedimentation. As pre-stage the silica is de-agglomerated in water using strong ultrasonic power treatment. The method is used for precipitated silica.
Ingrédients de mélange du caoutchouc — Silice précipitée — Détermination de la distribution dimensionnelle par à disque centrifuge
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INTERNATIONAL ISO
STANDARD 20927
First edition
2019-10
Rubber compounding ingredients —
Precipitated silica — Determination
of aggregate size distribution by disc
centrifuge
Ingrédients de mélange du caoutchouc — Silice précipitée —
Détermination de la distribution dimensionnelle par à disque
centrifuge
Reference number
ISO 20927:2019(E)
©
ISO 2019
---------------------- Page: 1 ----------------------
ISO 20927:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 20927:2019(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Significance and use . 1
5 Apparatus . 2
6 Reagents and materials . 2
7 Calibration of the test equipment . 3
7.1 Calibration of the ultrasonic device . 3
7.2 Routine alignment check . 3
8 Operating instructions . 3
8.1 Preparation of the disc centrifuge . 3
8.2 Sample preparation . 4
8.3 Cleaning the centrifuge . 5
9 Procedure. 5
10 Evaluation and documentation of the test results . 6
11 Precision data . 7
12 Safety precautions
...
INTERNATIONAL ISO
STANDARD 20927
First edition
2019-10
Rubber compounding ingredients —
Precipitated silica — Determination
of aggregate size distribution by disc
centrifuge
Ingrédients de mélange du caoutchouc — Silice précipitée —
Détermination de la distribution dimensionnelle par à disque
centrifuge
Reference number
ISO 20927:2019(E)
©
ISO 2019
---------------------- Page: 1 ----------------------
ISO 20927:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 20927:2019(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Significance and use . 1
5 Apparatus . 2
6 Reagents and materials . 2
7 Calibration of the test equipment . 3
7.1 Calibration of the ultrasonic device . 3
7.2 Routine alignment check . 3
8 Operating instructions . 3
8.1 Preparation of the disc centrifuge . 3
8.2 Sample preparation . 4
8.3 Cleaning the centrifuge . 5
9 Procedure. 5
10 Evaluation and documentation of the test results . 6
11 Precision data . 7
12 Safety precautions
...
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