The aluminum used for ropp caps has a high-gloss surface, which improves the aesthetics of the product, and the high hardness and corrosion resistance ensure long-term use in special environments. In order to avoid orange peel in the deep-drawing process of the aluminum sheet coil, which affects the appearance of the cap product, and ensures the material strength of the aluminum material after baking, the aluminum used for the ropp cap material is required to have a high yield ratio and fine crystallites. granularity. The loss of geometric scrap during deep drawing requires a material with a small ear rate.
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