IRM 241 is the designation for a special butyl rubber used to evaluate the operation of Mooney Viscometers according to the procedures as described in D1646. See page 9 of this Documentation Sheet for additional background on this IRM. 

IRM 241是一种特殊的丁基橡胶，作为门尼粘度计的标准橡胶，用于仪器的日常检查和仪器重复性、再现性控制的一种标准物质。可以满足各种审核的需要。

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