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绝大多数餐盒是由纯度98.3-98.6%的金属,或合金元素含量最高达2.5%的ALMn和AlMnMg轻合金深冲成的四壁光滑的箔盒.所用的薄铝带厚度常在90-140微米.餐盒的内壁有一层耐高温的防腐漆(4-8克/米~2),盒子的外表面烤有光亮的或彩色的漆.在颜色选择上多半是采用该航班的标志色.餐盒的容量为200-400克,它们差不多都有一个翻口的盖子,盖子是由略薄一些的铝带制成,或本色或彩色(图1).
The vast majority of meal boxes are four-wall smooth foil pouches deep-drawn from ALMn and AlMnMg light alloy with 98.3-98.6% purity metal or up to 2.5% alloying elements. The thickness of the thin aluminum strip used is often between 90- 140 microns. The inner wall of the lunch box has a layer of high-temperature anti-corrosion paint (4-8 g / m ~ 2), the outer surface of the box baked with bright or colored lacquer. The capacity of lunchboxes is 200-400 grams, and almost all of them have an introversion cover made from a slightly thinner piece of aluminum, either plain or colored (Figure 1).