共查询到17条相似文献,搜索用时 843 毫秒
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由于塑料制品具有环保、节能、安全、舒适性和低成本等特点,使之得到汽车工业领域的广泛使用.本文阐述了塑料作为汽车材料的性能特点、车用塑料制品的概况与趋势、汽车塑料化部件的原材料和汽车塑料制品成型工艺;并介绍了改性塑料对传统工程塑料的冲击;同时指出车用塑料开发应用亟待加速. 相似文献
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本文根据塑料在现代汽车上的应用趋势,详细介绍了轿车广泛应用的塑料内饰件和外装件制品,并列举了车用功能件的塑料制品实例,以及其他车用塑料件. 相似文献
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普通的塑料遇到高温就会变形,可有一种塑料,它的强度很高,具备某些金属性能,有良好的机械性和尺寸稳定性,在高低温下其优良性能仍能保持。它就是工程上应用的—类高分子合成材料——工程塑料。目前,工程塑料主要包括聚酰胺(尼龙、PA)、聚碳酸酯(聚碳、PC)、聚甲醛(POM)、聚酯(主要 PBT)及聚苯醚(PPO)五种。它们能代替金属用于机器制造、仪器仪表工业、交通运输、建筑及尖端科技中的宇宙飞船部件。近几十年,世界工程塑料行业发展迅速,从70年代开始,工程塑料的增长率就超过普通塑料,年平均增长率达到15%,比普通塑料高—倍多。随着我国国民经济的不断发展,各种产业对工程塑料的需求不断扩大,可预见我国工程塑料市场将会呈现一派新的气象。 相似文献
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Human concern for the environment has grown in tandem with recent economic development, particularly in emerging nations. This paradigm change has led Malaysians to pay more attention to synthetic plastics challenges, particularly in Malaysia. This study aims to determine the attitudes of young Malaysian consumers on the usage of biodegradable plastics to minimize the use of synthetic plastic in the country. Generally, two motivations—hedonic and environmental motivations toward switching intention from synthetic to biodegradable plastic among the young consumers were examined in the study. Environmental motivations (environmental concern, environmental knowledge), as well as hedonic motivations (adventurous spirit, novelty-seeking), are used in this study to broaden the theory of consumption value (TCV) into four additional factors that may positively impact the young consumer's attitude and increase switching intention towards biodegradable plastics. The data was collected utilizing an online survey approach and a standardized questionnaire. The data of 386 young Malaysian customers were analyzed using structural equation modelling (SEM) using SmartPLS 3. The study's significant findings indicated that hedonic motivations, environmental motivations, and attitudes all impact switching intentions toward biodegradable plastics. This study also found that attitude is a mediator between hedonic and environmental motivations regarding switching intentions. These findings might aid the government in developing a new policy that encourages residents to adopt biodegradable plastics while also lowering pollution. 相似文献
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[目的]研究硫酰氟施药后在集装箱内的扩散规律以及集装箱装载不同的物品对硫酰氟吸附和解吸附作用的差异。[方法]根据集装箱的体积计算施药量,施药后不同时间点及散毒后关闭集装箱门不同时间点,用硫酰氟浓度检测仪测定箱内硫酰氟浓度。[结果]硫酰氟在集装箱内分布不均匀,下层浓度高于中层,中层浓度高于上层。相同施药量时,装载废纸集装箱内硫酰氟实际测量浓度低于装载废塑料集装箱内测量浓度。散毒后再次关闭箱门,箱内物品吸附的硫酰氟解吸再次释放出来,装载废旧塑料集装箱的浓度明显高于废纸集装箱内的浓度。[结论]硫酰氟密度大于空气,是其在集装箱上部与下部浓度存在差别的原因。与废塑料相比,废纸的孔隙多,致密程度差,对硫酰氟的吸附与阻留作用强于废塑料,因而吸附硫酰氟的作用更明显,而解吸硫酰氟的速度正好相反,慢于废塑料。 相似文献
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硅氟酸极具腐蚀性 ,考虑到经济性 ,2 0 #合金、哈氏合金、蒙乃尔等贵金属很少被选为泵材。由于橡胶、塑料等高分子材料具有很好的抗蚀性和一定的机械性能 ,且价格便宜 ,因此一般选用其作为泵体材料。我们通过分析、比较 ,成功选择国产氟硅酸泵替代国外进口泵 ,实现国产化。 相似文献
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