BS EN ISO 8130-5-2010 粉末涂料.粉末/空气混合物流动特性的测定

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标准号:BS EN ISO 8130-5-2010
中文标准名称:粉末涂料.粉末/空气混合物流动特性的测定
英文标准名称:Coating powders. Determination of flow properties of a powder/air mixture
标准类型:G51
发布日期:1993/4/15 12:00:00
实施日期:1993/4/15 12:00:00
中国标准分类号:G51
国际标准分类号:87.040
适用范围:This part of ISO 8130 specifies a method fordetermining the flow properties of a mixture ofcoating powder and air. The method reflectscommercial practice in powder spraying(see “Bibliography”, Annex B).The results obtained are influenced by thecomposition of the coating powder, its density,particle size distribution and particle shape,together with the tendency of the particles toagglomerate and to accept a triboelectric charge.NOTE 1 It is well known that the transport and sprayingcharacteristics of powders are highly dependent on their flowproperties in bulk and in air. The procedure described in thismethod is considered to be more meaningful than the “flow angle”approach sometimes used to evaluate bulk flow properties. In thelatter, the angle of the cone formed when a powder is allowed toflow through a vertical funnel on to a horizontal surface ismeasured. A given mass of powder with good flow propertiesforms a shallower cone than an equal mass of a powder withpoorer flow. The objections to the flow angle method are that it isdifficult to obtain a precise measurement and that the powder isused alone, whereas during application it is mixed with air.

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