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一概念: 塑料是一种新兴的工业材料,它的原料来源丰富,加工工艺简单,可以做到少切削或无切削,大大提高生产效率,同时塑料还具有如下几个特点: 1)质量轻:一般塑料比重为0.83～2.2左右,只有钢铁比重的1/4～1/8,铝比重的1/2左右。 2)强度高:如用玻璃纤维增强的塑料,它的单位重量的拉伸强度可高达1700～4000,而一般钢材仅有1600左右。 3)化学稳定性好:一般塑料对酸碱等化学药品均有良好的抗腐蚀能力,其中以聚四氟乙
A concept: plastic is a new industrial materials, its rich source of raw materials, processing technology is simple, can be less cutting or no cutting, greatly improving production efficiency, while the plastic also has the following characteristics: 1) light weight: The proportion of general plastic is about 0.83 ~ 2.2, only the proportion of steel 1/4 ~ 1/8, about 1/2 of the proportion of aluminum. 2) high strength: such as glass fiber reinforced plastic, its tensile strength per unit weight up to 1700 ~ 4000, while the general steel is only about 1600. 3) good chemical stability: the general plastic acid and alkali and other chemicals have good corrosion resistance, which polytetrafluoroethylene