EN ISO 8130-15:2023

Coating powders - Part 15: Rheology (ISO 8130-15:2023)

This document specifies methods for the determination of the rheological behaviour of a coating powder both in particulate and molten form.

Pulverlacke - Teil 15: Rheologie (ISO 8130-15:2023)

Dieses Dokument legt Verfahren zum Bestimmen des rheologischen Verhaltens von partikelförmigem sowie geschmolzenem Pulverlack fest.

Poudres pour revêtement - Partie 15: Rhéologie (ISO 8130-15:2023)

Le présent document spécifie les méthodes permettant de déterminer le comportement rhéologique d’une poudre pour revêtement à la fois sous forme particulaire et sous forme fondue.

Praškasti premazi - 15. del: Reologija (ISO 8130-15:2023)

Ta dokument določa metode za ugotavljanje reoloških lastnosti praškastih premazov v obliki delcev in staljeni obliki.

General Information

• Status: Published
• Publication Date: 31-Oct-2023
• ICS: 87.040 - Paints and varnishes
• Technical Committee: CEN/TC 139 - Paints and varnishes
• Drafting Committee: CEN/TC 139 - Paints and varnishes
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 01-Nov-2023
• Due Date: 24-Jul-2025
• Completion Date: 01-Nov-2023
• Ref Project: SIST EN ISO 8130-15:2024 - Coating powders - Part 15: Rheology (ISO 8130-15:2023)

Overview

EN ISO 8130-15:2023 - Coating powders, Part 15: Rheology specifies standardized methods to determine the rheological behaviour of coating powders both as particulate materials and in their molten state. The standard supports reproducible evaluation of powder fluidization, apparent viscosity, cohesion, deaeration and melt rheology to inform production, processing and quality control of powder coatings.

Key topics and technical requirements

• Scope: Methods for measuring rheological behaviour of powder coatings in particulate (fluidized bed) and molten forms.
• Apparatus: Requires a rotational rheometer compliant with ISO 3219-2, a cylindrical measurement cell (min. Ø50 mm, height 100 mm), rectangular stirrer (min. 10 × 30 mm), mass flow controller (0.05–5 L/min), pressure transducer and disposable plate-plate geometry for melt tests.
• Sampling: Representative sampling per ISO 15528; recommended minimum sample volume ~80 ml for particulate tests.
• Powder tests:
  • Fluidization measurements (unstirred and stirred modes) by varying air flow (example procedure: decrease from 5 L/min → 0 then increase to 5 L/min) to identify incipient and full fluidization.
  • Fluidized bed rheology across rotational speeds (typical range 0.1 to 1 200 min⁻¹; shear rates 0.02 s⁻¹ to 320 s⁻¹) to calculate apparent viscosity analogous to non‑Newtonian fluids.
  • Deaeration: standard procedure includes fluidizing at 5 L/min for 5 min at 8 min⁻¹, then stopping airflow and recording pressure response.
  • Cohesion strength: measures internal particle bonding as an index of flowability.
• Melt tests: Use a heated plate-plate rheometer (ISO 3219-2) to determine melt viscosity, gel point and polymerization-related behaviour; recommended plate diameter ≥25 mm and sample preparation guidance (e.g., compress particulate fill before melting).
• Results & reporting: Procedures for expression of results, precision and required test report information are included.

Applications and users

EN ISO 8130-15:2023 is practical for:

• Powder coating manufacturers optimizing formulations for sprayability, fluidization and cure behaviour.
• Process engineers tuning fluidized bed, pneumatic conveying and spraying systems.
• Quality control laboratories implementing standardized QC tests for lot release and stability checks.
• R&D and material scientists studying melt flow, gel-point and particle interactions to improve reuse and recycling of powders.

Practical benefits include improved process reproducibility, troubleshooting of flow problems, and data for specifying powders by rheological performance.

Related standards

• ISO 3219-1 / ISO 3219-2 (rheometry vocabulary and principles)
• ISO 8130-14 (vocabulary for coating powders)
• ISO 15528 (sampling)
• Other parts of the ISO 8130 series (coating powders test methods)

Keywords: EN ISO 8130-15:2023, coating powders, powder rheology, melt rheology, fluidized bed, apparent viscosity, powder coatings, quality control.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2024
Praškasti premazi - 15. del: Reologija (ISO 8130-15:2023)
Coating powders - Part 15: Rheology (ISO 8130-15:2023)
Pulverlacke - Teil 15: Rheologie (ISO 8130-15:2023)
Poudres pour revêtement - Partie 15: Rhéologie (ISO 8130-15:2023)
Ta slovenski standard je istoveten z: EN ISO 8130-15:2023
ICS:
87.040 Barve in laki Paints and varnishes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 8130-15
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2023
EUROPÄISCHE NORM
ICS 87.040
English Version
Coating powders - Part 15: Rheology (ISO 8130-15:2023)
Poudres pour revêtement - Partie 15: Rhéologie (ISO Pulverlacke - Teil 15: Rheologie (ISO 8130-15:2023)
8130-15:2023)
This European Standard was approved by CEN on 29 October 2023.

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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8130-15:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 8130-15:2023 has been prepared by Technical Committee ISO/TC 35 "Paints and
varnishes” of the International Organization for Standardization (ISO) and has been taken over as
which is held by DIN.
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 May 2024, and conflicting national standards shall be
withdrawn at the latest by May 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 8130-15:2023 has been approved by CEN as EN ISO 8130-15:2023 without any
modification.
INTERNATIONAL ISO
STANDARD 8130-15
First edition
2023-01
Coating powders —
Part 15:
Rheology
Poudres pour revêtement —
Partie 15: Rhéologie
Reference number
ISO 8130-15:2023(E)
ISO 8130-15:2023(E)
© ISO 2023
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 8130-15:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
4.1 Powder . 1
4.2 Melt . 1
5 Apparatus . 2
6 Sampling . 2
7 Experimental . 2
7.1 Powder measurements . 2
7.1.1 Fluidization measurements . 2
7.1.2 Fluidized bed rheology measurements . 3
7.1.3 Deaeration measurements . 3
7.1.4 Cohesion strength measurements . 3
7.2 Melt rheology measurements . 3
8 Expression of results . 3
9 Precision . 3
10 Test report . 4
Annex A (informative) Interpretation of results . 5
Bibliography .11
iii
ISO 8130-15:2023(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee
SC 9, General test methods for paints and varnishes.
A list of all parts in the ISO 8130 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
ISO 8130-15:2023(E)
Introduction
The powder coating process is dependent on several material variables, whose presence within the
powder mixture is critical for ensuring smooth operation. A precise understanding of the fluidization
behaviour is important for optimal processing parameters in the fluidized bed, during pneumatic
conveyance and the spraying process. In addition, understanding the long-term stability during storage
or behavioural change during processing can also help to improve the reuse of powder coatings.
Furthermore, melt rheology is introduced to understand the melt flow properties of a given powder
coating system, to provide information after spraying, on the powder melt viscosity and gel point. The
methods in this document can be used for quality-control and detailed studies.
v
INTERNATIONAL STANDARD ISO 8130-15:2023(E)
Coating powders —
Part 15:
Rheology
1 Scope
This document specifies methods for the determination of the rheological behaviour of a coating
powder both in particulate and molten form.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3219-1, Rheology — Part 1: Vocabulary and symbols for rotational and oscillatory rheometry
ISO 3219-2, Rheology — Part 2: General principles of rotational and oscillatory rheometry
ISO 8130-14, Coating powders — Part 14: Vocabulary
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 3219-1, ISO 8130-14 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
apparent viscosity
flow resistance of the fluidized powder bed
4 Principle
4.1 Powder
The different fluidization properties are determined in a rheometer. In addition to rotational speed
and torque, the airflow rate through the powder bed can be precisely controlled and the pressure drop
determined. This allows complete analysis of all fluidization parameters that influence the powder
coating process.
4.2 Melt
In order to characterize the powder in its molten form, a rheometer in accordance with ISO 3219-2 shall
be used to determine the melt and polymerization properties.
ISO 8130-15:2023(E)
5 Apparatus
Use ordinary laboratory apparatus, together with the following.
5.1 Rheometer, in accordance with IS
...