Study on Moulding Technology of Starch-Based Totally-Biodegradable Plastic Products塑料工业论文
【题名】：Study on Moulding Technology of Starch-Based Totally-Biodegradable Plastic Products塑料工业论文(Study on Moulding Technology of Starch-Based Totally-Biodegradable Plastic ProductsSuLiaoGongYeLunWen) 【关键词】：分子技术 生物降解塑料 生产工艺 温度 反应条件 清洁生产 【keywords】：FenZiJiShu ShengWuJiangJieSuLiao ShengChanGongYi WenDu FanYingTiaoJian QingJieShengChan 【作者】：MATaoLIUChang-jiang      【来源】： 知识词典 【期刊名称】：塑料工业(SuLiaoGongYe) 【国际标准刊号】：1005-5770        【国内统一刊号】：51-1270 【作者单位】：CollegeofFoodSciences,ShenyangAgriculturalUniv.,Shenyang110161,China(CollegeofFoodSciences,ShenyangAgriculturalUniv.,Shenyang110161,China) 【分类号】：TQ32 X384      【页码】：-264-268      【出版年】：2005.B05 【下载地址】：下载pdf全文          Based on monofactorial comparison experiment, the following two excellent technological formations are derived for the production of starch-based totally-biodegradable tray via extruding, pelleting,slicing, and sucking molding: The first formulation: 40% of starch, 12.5% of DOP, 5% of EVA, 15% of polyvinyl alcohol, 20%of talc power and calcium carbonate, and 7.5 % of other materials. The material temperature in high-speed kneader is about 90℃, rotation velocity is 600 r/min, kneading duration is 5-10 minutes, diameter of screw stem of extruder is 90 ram, ratio of length versus diameter of screw stem (L/D) is 44, rotation velocity of the screws stem is 40-50 r/min. Temperature in four segments of extruder is 145 ℃, 155℃,150℃, and 160℃ respectively, and temperature in extruder head is 170℃ ; the material rod extruded is set while passing a cold water hath, and then is cut to pellets whose size is 3 mm×3 mm; the latter is transformed into slices and subject to sucking molding after predrying; temperature of sucking molding is 180-190℃, and sucking molding duration is 15-20 seconds. The second formulation: 60% of starch, 15% of DOP, 5% of PFIB, 15% of polyvinyl alcohol, and 5% of other materials. All technological parameters are the same with that for the first formulation. According to the test result of Chinese Institute of Plastic Processing, the biodegradation ratio of the tray made through the above treatment 1 and 2 in 30 days amounted to 54.2 % and 70.6% respectively,which shows that a satisfied biodegradation effect is realized.
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