超有光聚酯切片色度的控制  

Control of superbright PET chromaticity

作　　者：叶丽华[1] 戴钧明[1] 殷小波[1] 

机构地区：[1]中国石化仪征化纤股份有限公司,江苏仪征211900

出　　处：《合成纤维工业》2014年第2期71-73,共3页China Synthetic Fiber Industry

摘　　要：从原料、聚合工艺及生产过程等方面,运用回归统计、相关性分析了超有光聚酯切片色度的影响因素,并提出了控制措施。结果表明:原料精对苯二甲酸(PTA)的色品指数(b*)值与超有光切片的色品指数(b)值之间存在显著线性正相关性,PTA的b*值上升1个单位,超有光切片的b值上升约2.2个单位,生产中宜将PTA的b*值控制在M±0.2(M≤1.1);在工艺稳定的情况下,最佳的PTA使用方式为按比例混合使用或专线使用,生产中应稳定控制回用乙二醇的比例、反应温度和液位,减少波动。The influential factors on the chromaticity of superbright polyester chip were analyzed by correlation regression statistics from the aspects of raw material,polymerization process and production situation,etc.The corresponding control measures were proposed.The results showed that there was a significant linear positive correlation between the chromatic index of purified terephthalic acid （PTA） （b ＊） and superbright polyeser chip （b） ; PET＇s b value rose about 2.2 units when PTA＇s b＊ value increased 1 unit; PTA＇s b ＊ value should be controlled as M ± 0.2 （M ≤ 1.1） ; PTA should be properly used by mixing at a certainproportion or used for a specific line; and the proportion of ethylene glycol,reaction temperature and liquid level should be steadily controlled during the production.

关 键 词：聚对苯二甲酸乙二醇酯 对苯二甲酸 超有光 色度 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]