The pre painted aluminium sheet for PP caps is made into ropp caps of various bottles. The alloys include 1060, 3104, 3105, 5052, 5182, 8011, 1100 and 3003. Dimensions can be customized. Regular tempers for the sheet are H14, H16, H18 and H19. The thickness ranges from 0.012mm to 0.5mm, and width 100mm to 1600mm. The sheet is also known as pre-pinted alu sheet, color coated alu sheet and pre-coated alu sheet. These refer to pp cap sheets with a uniform color. If you need sheets with printed designs, they are called printed alu sheets or color printed alu sheets.
Haomei has been engaged in the production of pre painted aluminium sheet for pp caps for two decades. Aluminum bottle cap materials must have a large stretch length, so materials with good elongation must be selected. Usually, the base material of the bottle cap aluminum sheet is made of 8011, 3003 and 3004 aluminum sheets. Sometimes 1050 and 1060 aluminum sheets are also adopted. Clients are advised to choose alloy according to properties they need. Generally 8011 and 3003 are more popular. This is because the content of metallic manganese in the aluminum-manganese alloy is stable near its saturation point, and under the joint action of other metals, it has appropriate elongation, good corrosion resistance and good processing performance.
Haomei achieves its quality control for pre painted pp cap aluminium sheets in the following ways. First, During the rolling process, the surface quality should be inspected at least once every 3 coils, and the surface quality of the finished product pass should be inspected for each coil. Second, after the rolled product passes, samples (horizontal, longitudinal, and 45 degree directions) are sent to the laboratory to check the tensile strength, yield strength, elongation, and test ear-making rate. Third, strictly guard the quality of slices to ensure that there are no burrs, knife back prints, and lotus leaf edges. Fourth, the coiling base is smooth and non-deflection, no sharp protrusions are allowed, and the finished pass must be smooth; the surface is not allowed to have defects such as pressure scratches, imprints, oil stains, black lines, bright lines, roll marks, and layers. With its stick to strict quality control, Haomei has won clients from over 80 countries in the past two decades.