长沙航空职业技术学院教案
PART Ⅰ Packaging materials
【步骤一】标题 Put forward some questions 教师:讲解
1. What are the purpose of packing?
2. What are the differences between packaging and packing? 3. How many difference types of plastic are there? What are they 4. What are the applications of HDPE and LDPE? 5. What are the advantage of paper?
6. Why do we use glass as packaging material?
【步骤二】 Study the new words 教师：讲解，带读 学生：跟读，自己理解
【步骤三】 Read and understand the text 学生：阅读
【步骤四】 Teach the paragraghs
[Para.8] PET is light, clear or transparent with high gloss (sparkling crystal clear), hard and wear-resistant. It is also a good barrier to gases.
聚对苯二甲酸乙二醇酯质地轻，表面透明具有光泽，且坚硬耐磨。同时能有效防止气体挥发。
[Para.9] It is among the most important and versatile of the hundreds of commercial plastics.
（聚乙烯）它是最重要并且用途最多的商业用塑料。
[Para.11] HDPE is used for most consumer and industrial blow-moulded
第 1 页 共 3 页
长沙航空职业技术学院教案
containers, and when strength is required.
在生活和工业中当需要一定强度容器时，用高密度聚乙烯来作为吹模容器。 [Para.12] LDPE (Low-Density Polyethylene) is the most commonly used plastic packaging, in particular when good clarity is demanded. 低密度聚乙烯是一种常用的塑料包装材料，特别是要求透明包装时。 [Para.19] Pure aluminium is a soft, silvery white, relatively light metal, which conducts heat and electricity easily.
纯铝比较柔软，呈现银白色，是相对较轻的金属，它容易导电和导热。 [Para.21] Glass is clear, rigid, chemically inert, heat resistant, resistant to internal pressure, and a complete barrier to water vapor and gases.
玻璃是一种透明，坚硬、不活泼、不导热、能抵抗内部压力的不透水和气的材料。
[Para.25] Clay coating is a very fine wash of clay that fills in any unevenness on some carton board so that the surface is smooth to print on.
粘土涂料是一种很好清洗的材料，将它填在不平坦的纸箱表面使表面光滑容易印刷。
【步骤五】 Summary （时间： 5分钟） 教师：讲解
The article introduces the main packaging materials as following: 1. plastic materials
There are many different types of plastic, depending on the kind of monomer, the length of polymer chains, and other added compounds. （1）
第 2 页 共 3 页
长沙航空职业技术学院教案
Polyethylene Terephthalate (PET)
PET is light, clear or transparent with high gloss , hard and wear-resistant.
（2） Polyethylene (Polythene) Polyethylene is usually translucent, tough and unaffected by water and a large range of chemicals. （3） Polypropylene (PP)
PP is used as a clear, white or metallized film. It can also be molded into bottles, jars and caps. （4） Polyvinylchloride (PVC) （5）Polystyrene (PS) 2. Multilayers
Frequently different materials are used together in layers to meet all the needs of the product inside. 3. Aluminium It is used for cans and foil. 4. Glass
Glass is clear, rigid, chemically inert, heat resistant, resistant to internal pressure, and a complete barrier to water vapor and gases. 5. Steel Steel consists of iron.
【步骤六】 课堂思考与回答问题 学生：回答
第 3 页 共 3 页
物流专业英语教案4
