Standard Svensk standard · SS-EN ISO 15512:2009

Plast - Bestämning av vattenhalt (ISO 15512:2008)

Status: Upphävd

· Ersätts av: SS-EN ISO 15512:2014
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Standard Svensk standard · SS-EN ISO 15512:2009

Plast - Bestämning av vattenhalt (ISO 15512:2008)
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Omfattning
1.1 This International Standard specifies methods for the determination of the water content of plastics in the form of granules and finished articles. These methods do not test for water absorption (kinetics and equilibrium) of plastics as measured by ISO 62. The methods are suitable for the determination of water content as low as the following levels: - Method A 0,1 % or better; - Method B 0,01 % or better; - Method C 0,01 % or better. Water content is an important parameter for processing materials, and should remain below the level specified in the appropriate material standard. 1.2 Three alternative methods are specified in this International Standard: a) Method A is an extraction method using anhydrous methanol followed by a Karl Fischer titration of the extracted water. It can be used for all plastics and is applicable to granules having a maximum size of 4 mm × 4 mm × 3 mm. b) Method B is a vaporization method using heated, dry air or nitrogen gas to evaporate the water, followed by a Karl Fischer titration of the collected water. It can be used for all plastics and is applicable to granules smaller than 4 mm × 4 mm × 3 mm. c) Method C is a manometric method. The water content is determined from the increase in pressure which results when the water is evaporated under a vacuum. This method is not applicable to plastic samples containing volatile compounds, other than water, in amounts contributing significantly to the vapour pressure at room temperature. Checks for the presence of large amounts of volatile compounds should be carried out periodically, for example by gas chromatography. Such checks are particularly required for new types or grades of material.

Ämnesområden

Plast Allmänt (83.080.01)


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Standard Svensk standard · SS-EN ISO 15512:2009

Plast - Bestämning av vattenhalt (ISO 15512:2008)
Prenumerera på standarden - Läs mer Dölj
Pris: 1 013 SEK
standard ikon pdf

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Pris: 1 013 SEK
standard ikon

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Produktinformation

Språk: Engelska

Framtagen av: Plast, SIS/TK 156

Internationell titel: Plastics - Determination of water content (ISO 15512:2008)

Artikelnummer: STD-70252

Utgåva: 2

Fastställd: 2009-07-16

Antal sidor: 32

Ersätter: SS-EN ISO 15512

Ersätts av: SS-EN ISO 15512:2014