Aluminum PP caps are mostly processed in production lines with a high degree of automation, so the strength, elongation and dimensional deviation of the material are strictly required, otherwise cracks or creases will occur during processing. In order to ensure the convenience of printing after the cap is formed, the surface of the cap material is required to be flat, free from rolling marks, scratches and stains. The alloys generally used are 8011-H14, 3003-H16, etc., and the thickness of the material specification is generally 0.20mm. ～0.23mm, width is 449mm～796mm. The production of aluminum bottle cap materials can be produced by hot rolling or continuous casting and rolling, and cold rolling.