Madhur Threads India Private Ltd. Manufactures Polyster Core Spun Threads. Madhur Threads India Private Ltd. Offers various threads for multi head embroidery and sewing. The Polyster Core Spun Threads caters to the needs of sewing heavy duty garments like jeans, leather garments, bags etc. The Polyster Core Spun Threads is highly lubricated with special lubricants to provide excellent sewing performance.