Polymer Sheet and Manufacturing Method and Use Thereof

A method for preparing a polymer sheet, wherein the polymer sheet is in a form of honeycomb in a thickness direction, and a thickness of each polymer sheet is smaller than an average pore diameter of the polymer sheet,

• the method comprising following steps:
• an unwinding step, wherein a roll of polymer material having same material as the polymer sheet is fed into a cutting device at a feeding speed of 0.1 m/min to 10 m/min, the roll of polymer material having a thickness of 0.1 mm to 5 mm;
• a continuous cutting step, wherein cutting is performed by a cutter going along a cross section perpendicular to a thickness direction of the roll of polymer material, and the cutting is carried out in a length direction of the roll of polymer material, to obtain a polymer sheet having a set thickness, wherein a length and a width of the polymer sheet are the same as the length and width of the roll of polymer material, and a thickness of the polymer sheet is smaller than the thickness of the roll of polymer material, the thickness of the polymer sheet is smaller than an average pore diameter of the roll of polymer material, and a precision error of the continuous cutting step is within ±20%;
• and
• a winding step, wherein the polymer sheet is wound into a roll of polymer sheet, at a winding tension of 0 N to 100 N.