BS 4745-2005 织物耐热性测定.双板法:固定断开程序，双板法:固定断开程序和单板法

标准号：BS 4745-2005
中文标准名称：织物耐热性测定.双板法:固定断开程序，双板法:固定断开程序和单板法
英文标准名称：Determination of the thermal resistance of textiles - Two-plate method: fixed pressure procedure, two-plate plate method: fixed opening procedure, and single-plate method
标准类型：W04
发布日期：2005/11/25 12:00:00
实施日期：2005/11/25 12:00:00
中国标准分类号：W04
国际标准分类号：59.080.01
引用标准：BS EN ISO 5084;ISO 139;ISO 8302
适用范围：This part of BS 4745 specifies three methods for the determination of the resistance of fabrics, fabricassemblies or fibre aggregates in sheet form to the transmission of heat through them in the steady statecondition. It applies to materials whose thermal resistance is up to approximately 0.2 m2·K/W.These methods are suitable for materials up to 20 mm thick (above this thickness, edge losses becomeappreciable). Advice on suitable components for constructing the apparatus is given in Annex A and meansof calculating the thermal conductivity are described in Annex B.Three methods are described:a) two-plate method: fixed pressure procedure;b) two-plate method: fixed opening procedure;c) single-plate method.Either of the two-plate methods is suitable for materials that, when in use, have their outer faces shieldedfrom the ambient air, e.g a blanket when covered by a bedspread.The single-plate method is suitable for materials that, when in use, have their outer faces exposed to theambient air (e.g. bedspreads and outerwear).The two-plate methods are generally preferred on accuracy and reproducibility grounds.