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1)GB/T1033.1—2008《塑料非泡沫塑料密度的测定第1部分:浸渍法、液体比重瓶法和滴定法》。与原标准GB/T1033—1986《塑料密度和相对密度试验方法》相比,主要变化是:a)浸渍法:浸渍液的恒温控制温度由(23±1)℃改为(23±0.5)
1) GB / T1033.1-2008 “Determination of density of non-foamed plastics - Part 1: Immersion method, liquid pyknometer method and titration method”. The main changes compared with the original standard GB / T1033-1986 “Test methods for plastic density and relative density” are as follows: a) Impregnation method: the temperature of the immersion liquid is changed from (23 ± 1) ℃ to (23 ± 0.5)