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塑料的应用是包装发展史上的一次飞跃,它具有轻、便、优、美四大优点。至今它在包装中的地位仍无可替代。以美国为例,1998年包装消费金额超过1212亿美元,其中塑料包装材料为397亿美元,占32%,为第2位。在欧洲,1996年包装消费金额约1100亿美元,塑料包装占29%(其它为金属、玻璃、木材等)。在我国,2000年全国包装总产值达2200亿元人民币,塑料包装在所有包装材料中排第2位(第1位是纸),占32.3%。人们把厚度在0.2mm以下的平面状塑料制品称为薄膜,把0.2mm—0.7mm的平面状制品称为片材,而把0.7mm以上的平面状制品称作板材。目前在四大包材,即纸及纸板、塑料、玻璃和金属中,塑料占第二位,而塑料薄膜几乎占塑料包材中的一半。近来,多姿多彩的新型塑料薄膜不断涌现,正以其优良的综合性能、合理的价格、有利于环境而成为当今塑料包装业中的一道亮丽风景线。
The application of plastic is a leap in the history of packaging, which has the advantages of lightness, convenience, excellence and beauty. So far its status in the packaging is still irreplaceable. In the United States, for example, the amount spent on packaging in 1998 exceeded 121.2 billion U.S. dollars, of which plastic packaging material was 39.7 billion U.S. dollars, accounting for 32% of the total. In Europe, packaging consumption in 1996 was about 110 billion U.S. dollars, and plastic packaging accounted for 29% (other metals, glass, timber, etc.). In China, the total output value of packaging in 2000 amounted to 220 billion yuan. The plastic packaging ranked the second in all packaging materials (the first one was paper), accounting for 32.3% of the total. A flat plastic article having a thickness of 0.2 mm or less is called a film, a flat article of 0.2 mm to 0.7 mm is referred to as a sheet, and a flat article of 0.7 mm or more is called a sheet. Plastic currently ranks second in the four major packaging materials, paper and board, plastic, glass and metal, while plastic film accounts for almost half of the plastic packaging material. Recently, a variety of new plastic films continue to emerge, with its excellent overall performance, reasonable price, is conducive to the environment and become today’s plastic packaging industry in a beautiful landscape.