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PC core spun sewing thread is produced by poly filament wrapped with long stapled cotton in good quality. Its characters are of both high tenacity as poly filament and natural style as cotton fibre. It is suitable for high speed sewing and external cotton fibre can offset the heat caused by high speed sewing. PP core spun sewing thread is produced by poly filament wrapped with cotton typed poly short fiber in good quality .Its characters are of both high tenacity as poly filament and natural hairiness&handle as poly short fiber.It is suitable for high speed sewing, and can meet the demand of the style of the clothes'materials solving the problem that common short fiber can not adapt to high speed sewing.