标准编号：ISO 5636-4:2005
中文名称：纸和纸板 透气性（中等范围）的测定 第4部分：谢菲尔德（SHEFFIELOT）法
英文名称：Paper and board — Determination of air permeance (medium range) — Part 4: Sheffield method
发布日期：2005-02
标准范围
This part of ISO 5636 specifies a method of determining the air flow rate through unit area of a sheet of paper or board, under unit pressure difference using apparatus called the Sheffield instrument.The method is applicable to papers and boards having air permeances between 0,02 μm/(Pa·s) and 25 μm/(Pa·s). The method is not suitable for papers and boards with a rough surface, such as crepe paper and corrugated papers, which cannot be securely clamped to avoid surface leakage.
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