NF ISO 4656
Rubber compounding ingredients - Carbon black - Determination of oil absorption number (OAN) and oil absorption number of compressed sample (COAN)
Oil absorption number (OAN) is a measure of the ability of a carbon black to absorb liquids. This property is a function of the structure of the carbon black. Either dibutyl phthalate (DBP) or paraffin oil is acceptable for use with standard pelleted grades, including N‑series carbon blacks found in ASTM D1765, although OAN testing using paraffin oil on some speciality blacks and powder blacks might result in unacceptable differences as compared to OAN testing using DBP oil. While studies have shown the two oils to give comparable precision, paraffin oil offers the advantage of being non-hazardous. ISO 4656:2012 specifies a method using an absorptometer for the determination of the oil absorption number of carbon black for use in the rubber industry. The same method is used for the determination of the oil absorption number of compressed samples of carbon black. The procedure for the preparation of the compressed samples is described in an annex.
Oil absorption number (OAN) is a measure of the ability of a carbon black to absorb liquids. This property is a function of the structure of the carbon black. Either dibutyl phthalate (DBP) or paraffin oil is acceptable for use with standard pelleted grades, including N‑series carbon blacks found in ASTM D1765, although OAN testing using paraffin oil on some speciality blacks and powder blacks might result in unacceptable differences as compared to OAN testing using DBP oil. While studies have shown the two oils to give comparable precision, paraffin oil offers the advantage of being non-hazardous.
ISO 4656:2012 specifies a method using an absorptometer for the determination of the oil absorption number of carbon black for use in the rubber industry.
The same method is used for the determination of the oil absorption number of compressed samples of carbon black. The procedure for the preparation of the compressed samples is described in an annex.
Le présent document spécifie une méthode pour la détermination, à l'aide d'absorptiomètres, de l'indice d'absorption d'huile par le noir de carbone destiné à l'industrie du caoutchouc. Cette méthode s'applique également aux échantillons comprimés.
- Avant-proposiv
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1 Domaine d'application1
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2 Références normatives1
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3 Principe1
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4 Réactifs2
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5 Appareillage2
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6 Préparation de l'échantillon3
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7 Conditions d'essai3
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8 Mode opératoire3
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8.1 Vérification de l'absorptiomètre et de la burette à débit constant3
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8.2 Étalonnage et normalisation de l'absorptiomètre3
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8.3 Prise d'essai4
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8.4 Dosage5
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9 Expression des résultats5
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10 Fidélité et biais6
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11 Rapport d'essai6
- Annexe A (normative) Préparation des prises d'essai comprimées7
- Annexe B (normative) Vérification et réglage du ressort et de l'amortisseur hydraulique12
- Annexe C (normative) Vérification de la burette à débit constant14
- Annexe D (informative) Fidélité et biais16
- Bibliographie18
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