Aluminum foil Jumbo roll for Lithium ion Battery
The surface of the first aluminum foil has uniform color, cleanness and flatness, and no obvious roll marks, pitting, pinholes and corrosion marks;
The second aluminum foil surface has no rolling defects such as creases, spots, and bright lines;
The third aluminum foil has no color difference on the surface;
The fourth surface is oil-free, has no serious oil odor, and has no oil spots visible to the naked eye;
Fifth surface tension, Dyne pen test is not less than 32 dyne;
Sixth, the aluminum foil coil is wound tightly, the end surface is smooth and the edges are smooth;
Seventh, the aluminum foil roll layer shall not exceed ±1.0mm;
Eighth, the width of the aluminum foil roll core is greater than or equal to the foil width, and generally the length of the two ends of the die does not exceed 5 mm of the foil width;
Ninth, the aluminum foil should be wrapped around the center of the die;
Tenth, the joint part has a clear joint mark at the two ends of the aluminum coil.
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