GB/T 8291-2008 in English

本标准于１９８７年７月首次发布。本标准代替ＧＢ／Ｔ８２９１—１９８７《天然浓缩胶乳　凝块含量的测定》。本标准规定了浓缩天然胶乳凝块含量（筛余物）的测定方法。本标准适用于浓缩天然胶乳凝块含量（筛余物）的测定，不适用于以浓缩天然胶乳为原料的配合胶乳和硫化胶乳凝块含量（筛余物）的测定。 本标准与ＧＢ／Ｔ８２９１—１９８７的主要差异如下：
———把标准名称改为：《浓缩天然胶乳　凝块含量（筛余物）的测定》；
———在第３章定义中增加了３．１实验室样品；
———在第６章仪器中增加了６．１公称平均孔径为７１０μｍ±２５μｍ 的过滤筛网；
———在第８章操作程序中增加了实验室样品经过７１０μｍ 过滤筛网粗滤。

Scope

Warning: Personnel using this standard should be familiar with the operating procedures of formal laboratories. This standard does not intend to address all safety issues that may arise from the use of this standard. Users formulate corresponding safety and health rules and ensure compliance with relevant national laws and regulations. This standard specifies the determination method for the clot content (residue of sieving) of concentrated natural rubber latex. This standard applies to the determination of the curd content (residue) of concentrated natural rubber latex, and does not apply to the determination of the curd content (residue of sieve) of compound latex and vulcanized latex that use concentrated natural latex as raw materials.