Färg och lack

Ämnesområden: Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 11 jun 2018
Se merSe mindre
 

This part of ISO 8130 specifies a method for the determination of the particle size of coating powders by sieve analysis. Particle size distributions with a maximum of less than 100 μm should be determined by laser diffraction (see ISO 8130-13). This method is used especially for determining the oversize material or for the presence of contamination and may be used as a quality control procedure (“go”/“no go” test) by checking the amount of powder retained on a single sieve.

The following particle sizes are typical for coating powders, however the particle size can deviate depending on the application:

— thin-film technology: 1 μm to 63 μm

— electrostatic coating: 10 μm to 200 μm

— fluidizing-bed method: 100 μm and above

NOTE Sieves with a mesh size smaller than 32 μm are not practical and are likely to become blind during use.

Ämnesområden: Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 11 jun 2018
Se merSe mindre
 

This part of ISO 8130 specifies a comparative method for determining the flow characteristic of a fused thermosetting coating powder down a plane inclined at a set angle to the horizontal.

The aim of the test method described in this Part of IS0 8130 gives an indication of the degree of melt flow that may occur during the curing of the coating powder. This characteristic contributes to the surface appearance and to the degree of coverage over sharp edges.

The test is a comparative method for checking for batch to batch variation in the behaviour of a given coating powder. Correlation between the results from coating powders of differing composition is not to be expected.

This method is not suitable for coating powders which have gel times of less than one minute at the test temperature when characterised according to ISO 8130-6. This method is also not suitable for textured powders.

Ämnesområden: Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 11 jun 2018
Se merSe mindre
 

This part of ISO 8130 specifies a visual method to determine the deterioration of surface quality of the final coating when mixing two different coating powders. The surface quality will depend on the following characteristics of the coating powders:

a) the chemical reactivity;

b) the chemical composition;

c) the melt properties.

The onset of the incompatibility in appearance, its nature and its extent will depend greatly on the ratio in which the powders are mixed. The nature of the incompatibility in surface appearance may manifest itself in various ways, described in Clause 8.

This test is useful in predicting the possibility of incompatibility arising from mixing different powders both during the manufacturing process and during the application of the coating powder.

This part of ISO 8130 concerns only changes in visual aspects of the coating. The mixture series can also be used for testing properties such as mechanical properties, chemical properties, corrosive properties and resistance against UV radiation. Further properties can be agreed between interested parties.

Ämnesområden: Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 11 jun 2018
Se merSe mindre
 

This part of ISO 8130 specifies a method for the determination of the equivalent-sphere particle size distribution of coating powders by laser diffraction, for particles of the size range from 1 μm to 300 μm.

NOTE Particle sizes > 300 μm may well require the use of a different optical model.

This document is specific for the measurement of coating powders and also engages ISO 13320, which provides guidance on instrument qualification and particle size distribution.

Laser diffraction is not suitable for determining oversize material, which can be verified by sieve analysis as specified in ISO 8130-1 or by dynamic image analysis as specified in ISO 13322-2.

Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 11 jun 2018
Se merSe mindre
 

This part of ISO 8130 defines special terms used in the field of coating powders.

Other terms and definitions related to paints and varnishes are given in ISO 4618.[1]

[1] ISO 4618, Paints and varnishes — Terms and definitions

 

Ämnesområden: Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 11 jun 2018
Se merSe mindre
 

This part of ISO 8130 specifies a method for the determination of loss of mass on stoving of coating powders that are to be applied by electrostatic spraying or flock spraying or fluidized bed.

The method described in this part of ISO 8130 is a simple, practical test which provides sufficiently accurate results for coating powders that lose approximately 2 % (by mass) on stoving (heating). Above this, accuracy decreases with an increasing loss in mass.

This method determines all volatile matter including water.

Thermogravimetric testing as described in ISO 11358[1] may be used as a comparative method.

[1] ISO 11358 (all parts), Plastics — Thermogravimetry (TG) of polymers

Ämnesområden: Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 20 jun 2018
Se merSe mindre
 

This document specifies a natural weathering test for exterior wood coating systems mainly intended for decoration and protection of planed and sawn wood.

The test provides a means of evaluating the performance of a wood coating system during outdoor exposure. It forms the basis for the performance specification in accordance with EN 927-2. It also facilitates the comparison of coating systems performance on different substrates including the wood species, or other wood modifications.

Ämnesområden: Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 20 jun 2018
Se merSe mindre
 

This document specifies a natural weathering test for exterior wood coating systems mainly intended for decoration and protection of planed and sawn wood.

The test provides a means of evaluating the performance of a wood coating system during outdoor exposure. It forms the basis for the performance specification in accordance with EN 927-2. It also facilitates the comparison of coating systems performance on different substrates including the wood species, or other wood modifications.