夹具浮动介质的选择原则

根据外现形态对浮动介质进行分类,对各自的性能特点进行了分析比较,较系统地总结了浮动介质的选择原则.     

市场化进程、企业环境信息披露与债务融资——来自我国石化塑胶行业上市公司的经验证据

文章以2010至2012年的石化塑胶行业上市公司为研究样本,分别研究企业环境信息披露质量对债务融资的影响。研究结果显示：目前我国石化塑胶行业上市公司的环境信息披露质量参差不齐,披露内容缺乏规范性与统一性。环境信息披露质量对企业银行借款和长期借款的影响呈现正相关关系,并且这种相关性在高市场化地区比低市场化地区更显著。环境信息披露质量对企业商业信用的影响呈现负相关关系,它们之间的负相关性在低市场化地区比高市场化地区更显著。另外,环境信息披露质量对企业短期借款的影响呈现负相关关系,但不够显著。     

建筑屋面防水隔热新材料--聚氨酯硬泡的应用研究

对用于建筑屋面防水隔热新材料"聚氨酯硬泡",从制品性能、特点及原料配方作了理论探讨及实验摸索,取得了满意的结果.     

密炼机塑混炼过程的自动控制

讨论了利用电流—时间综合控制塑混炼质量的新方法,这种方法有利于提高塑炼质量。     

Life cycle environmental impacts of consumer packaging products in Japan

Several Japanese companies and the government are recently promoting a plastic ban and imposing a tax levy to curb litter and reduce greenhouse gas emissions. This has led to a rapid rise of nonplastic packaging alternatives. While plastics and litter are pressing concerns, it is paramount to examine environmental risks of other alternatives before wide application and legislative action, to not further the risk of environmental damage. This study aims to quantify and compare plastic products such as polyethylene-terephthalate (PET) bottles and high-density polyethylene (HDPE) bags with widely available alternatives in Japan like glass bottles, aluminum bottles, paper bags, and textile bags, to find a product with the least environmental impact. A life cycle assessment is conducted from a cradle-to-grave environmental impact approach that includes raw material extraction, production, transportation, end-of-life treatment, and disposal. Sixteen impact categories including climate change, acidification, aquatic-toxicity, so forth, and weighing is assessed using the MiLCA software. The functional unit is one piece of each packaging product, and impacts of product-filling, storage, recycling, and reuse are excluded for a consistent comparison. HDPE bags performed better than paper and textile bags in 15 of the 16 analyzed impact categories. Similarly, PET bottles outperformed aluminum and glass bottles in 12 out of the 16 impact categories analyzed. Weighted results also highlight the heightened negative environmental impacts of replacing plastic packaging with widely available alternatives.     

注塑成型工艺参数对注塑件缩痕影响的研究

利用Moldflow软件的最佳浇口位置分析功能确定出最佳浇口位置。研究了注塑成型工艺参数对注塑件缩痕的影响,对不同的工艺参数进行了分析,确定出用于注塑成型的较合适的工艺参数。研究结果表明:熔体温度、模具温度的降低以及注射时间的增加都能够有效的减小缩痕。     

《塑料加工助剂》课程教学改革探索

塑料加工助剂在高分子材料加工中起着重要作用 ,然而其内容繁多 ,抽象难学 ,对学生基础要求较高。我们结合多年教学经验 ,对教学内容 ,教学方式 ,考核方式等多方面进行了探讨