ISO 6186 pdf download

ISO 6186 pdf download.Plastics — Determination of pourability 1 Scope This International Standard specifies two methods, A and B, for determining the pourability of plastics in powdered and granular form by measuring the flow time through a funnel. From method A, information concerning the processability can be derived, whilst method B is especially designed for process control during manufacture. NOTE — The methods described are not applicable to all plastics in powdered and granular form. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 291 :1 997, Plastics — Standard atmospheres for conditioning and testing. 3 Definition For the purposes of this International Standard, the following definition applies: 3.1 flow time: The time taken for a defined mass or volume of test material to flow through a funnel of specified dimensions. It is indicated in seconds (s). 4 Principle The time taken for a defined mass or volume of the test material to flow through a funnel of specified dimensions is measured. 5 Apparatus 5.1 Funnel, of the shape and dimensions shown in figure 1 and in table 1 . Simple test funnels or test funnels with exchangeable nozzles may be used. The funnel shall be made of metal, for example stainless steel, and have the inside surface carefully polished. It shall be fitted with a device for closing the outlet (for example a metal plate). The funnel shall be earthed to discharge electrostatic charges. 6 Conditioning Unless otherwise specified, materials shall be tested as received under ambient atmospheric conditions. If the test atmosphere can affect the results, it may be specified that the sample be conditioned for 24 h at a temperature of 23 °C ± 1 °C and (50 ± 5) % relative humidity, as specified in ISO 291 , and tested in the same atmosphere. 7 Procedure 7.1 General When using either method A or method B, start with d = 1 0 mm. If the sample does not flow through completely or does not flow at all, repeat the determination...