ISO 8130-7:2019 “Powder coatings — Part 7: Determination of mass loss during baking” (GB/T 21782.7-2008) provides a method for determining mass loss during baking of powder coatings applied to substrates by electrostatic spraying.

Standard No. : ISO 8130-7-2019 Name: Powder coatings – Part 7: Determination of mass loss during baking Practice status: current
A Preface
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This document is prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General Test methods for paints and varnishes.

The second edition cancels and replaces the technically revised first edition (ISO 8130-7:1992).

Compared with the previous edition, the main changes are as follows:

– Added “Terms and definitions” clause;

– added the “principles” clause;

– The name of the mass has changed significantly, where m0 is now (m 1 — m0) and m 1 is now (m 2 — m0);

— A table has been added to Annex A, which contains time, temperature and sample quality data for different classes of paint powders;

– Delete the original annex A “Supplementary information required”;

— The text has been edited and revised, and normative references have been updated.

A list of all parts in the ISO 8130 series can be found on the ISO website.

Any feedback or questions regarding this document should be directed to the user’s national standards body. A full list of these agencies can be found at iso.org/members.html.

ISO 8130-7-2019 Powder coatings – Part 7: Determination of mass loss upon baking

1 Scope
This document provides a method for determining the baking quality loss of coating powders applied by electrostatic or flocking spraying or fluidized beds.

The method described in this document is a simple and practical test that provides sufficiently accurate results for powders that lose approximately 2% (by mass) when roasted (heated). Beyond 2%, the accuracy decreases as the quality loss increases.

This method determines the amount of all volatile substances, including water.

The thermogravimetric test described in the ISO 11358 series can be used as a comparison method.

2 Normative references
The following documents are referenced in the text in such a way that some or all of their contents constitute the requirements of this document. For dated references, only the cited version applies. For undated references, the new version of the reference (including any revisions) applies.

ISO 8130-14, coating powders — Part 14: Vocabulary

ISO 15528, Paints, varnishes and raw materials for paints and varnishes – Sampling

ISO 8130-7-2019 Powder coatings – Part 7: Determination of mass loss upon baking

3 Terms and definitions
For the purposes of this document, the specific terms and definitions given in ISO 8130-14 apply.

ISO and IEC maintain terminology databases for standardization at the following addresses:

– ISO online browsing platform: available at iso.org/obp

– IEC Electronic Encyclopedia: available at electropedia.org/

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