Functional fabric obtained by recycling separator for secondary battery, and method for manufacturing same

A method for manufacturing an upcycle functional fabric, comprising steps of:

• (a) preparing a separator sheet with a microporous structure discarded due to treatment as defective or overproduction in production processes for manufacturing secondary batteries, wherein the separator sheet is composed of a polyolefin-based polymer film in the form of a thin film;
• (b) interposing an adhesive sheet, which is a hot melt web adhesive made of an ethylene vinyl acetate (EVA) component and formed in the form of a web provided with a plurality of pores, between the separator sheet and a fabric sheet to be added to the separator sheet, thereby supplying each sheet;
• (c) laminating the separator sheet and the fabric sheet so that they are bonded by melting of the adhesive sheet, wherein
• in the step (b), each sheet is supplied to maintain a constant tension, but the separator sheet, the adhesive sheet, and the fabric sheet are all supplied at the same speed of 6 to 10 m/min, and
• in the step (c), a stacked structure, in which the separator sheet, the adhesive sheet, and the fabric sheet are stacked in this order is pressed in a temperature of 100 to 120° C., and laminated,
• wherein in the step (c), the stacked structure passes between compression rollers maintaining a gap and facing each other, and simultaneously is pressed at a pressure of 2 to 7 kgf/cm2 by the compression rollers,
• wherein the fabric sheet has fine hairs of microfiber formed by a brushing process on one side facing the separator sheet in order to increase an adhesive surface area with the separator sheet.