IEC 60811-605:2012 pdfダウンロード

IEC 60811-605:2012 pdfダウンロード。Electric and optical fibre cables – Test methods for non-metallic materials – Part 605: Physical tests – Measurement of carbon black and/or mineral filler in polyethylene compounds
1 Scope
This Part 605 of IEC 6081 1 describes the test methods for measuring the content of carbon black added for UV stabilization of polyethylene and polyolefin compounds. These methods are not suitable for halogenated compounds.
Method A is suitable only for polyethylene and polypropylene compounds.
Method B is suitable for polyolefine compounds.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 6081 1 -1 00:201 2, Electric and optical fibre cables – Test methods for non-metallic materials – Part 100: General
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 6081 1 -1 00 apply.
4 Test method
4.1 General
This part of IEC 6081 1 shall be used in conjunction with IEC 6081 1 -1 00.
Unless otherwise specified, tests shall be carried out at room temperature.
4.2 Method A – Measurement of carbon black and/or mineral filler content in polyethylene by direct combustion
4.2.1 Sample and test piece preparation
A sample of the outer covering or sheath of sufficient weight shall be taken from one end of the cable. The sample shall be cut in pieces, the dimensions of which shall not exceed 5 mm in any direction.
4.2.2 Test procedure
A combustion boat about 75 mm long shall be heated until it is red hot, allowed to cool in the desiccator for at least 30 min and weighed to the nearest 0,000 1 g. A sample of polyethylene weighing (1 ,0 ± 0,1 ) g shall be placed in the boat and the whole weighed to the nearest 0,000 1 g. The weight of the boat shall be subtracted to give the weight of the polyethylene to the nearest 0,000 1 g (quantity A).
The boat and the sample shall then be placed in the middle of a hard glass, silica or porcelain combustion tube, with a bore approximately of 30 mm, and (400 ± 50) mm in length. A stopper carrying a thermometer for temperature measurements from 300 °C to 650 °C and a tube for the admission of nitrogen shall then be inserted into one end of the combustion tube so that the end of the thermometer touches the boat. Nitrogen with an oxygen content of less than 0,5 % shall be passed through the combustion tube at (1 ,7 ± 0,3) l/min and this rate of flow shall be maintained during the subsequent heating.