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| GB/T 21991-2008 Plastics - Preparation of PVC paste for test purpose - Planetary-mixer method (English Version) |
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Detail of GB/T 21991-2008
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Introduction of GB/T 21991-2008
本标准于１９９２年首次发布。本标准代替ＧＢ／Ｔ１２００４．５—１９９２《聚氯乙烯增塑糊刮板细度的测定》。本标准规定了将适宜的PVC树脂、增塑剂和其他组分经行星混合过程制备成糊（也称塑溶胶）的两种方法，即方法A和方法B。本标准与ＧＢ／Ｔ１２００４．５—１９９２的主要技术性差异如下：
———修改了标准名称；
———增加了“术语和定义”一章（本版第３章）；
———删除了刮板细度计的具体规定（１９９２年版的３．１和３．２）。
Contents of GB/T 21991-2008