A heat setter that heat-sets delicate knit fabrics, sensitive knit fabrics, similar constituted fabrics, and analogously constituted fabrics that may include metal, other threads, and panels in or appended to the delicate knit fabrics and the sensitive knit fabrics, and supports and avoids stretching, marking, and drooping of the delicate knit fabrics and the sensitive knit fabrics going through the heat setter. The heat setter includes a main portion. The main portion heat-sets the delicate knit fabrics, the sensitive knit fabrics, the similar constituted fabrics, and the analogously constituted fabrics that may include the metal, the other threads, and the panels in or appended to the delicate knit fabrics and the sensitive knit fabrics, and supports and avoids the stretching, the marking, and the drooping of the delicate knit fabrics and the sensitive knit fabrics going through the main portion.

A non-woven fabric with elasticity in warp direction and a manufacturing method thereof are provided, including: a feeding step, feeding the non-woven fabric into a location between the difference gears and suction gears in an overfeeding manner; a wave forming step, entering the non-woven fabric to a location between the differential gears and the suction gears, thereby forming wavy folds; a fixing step, providing a suction force through suction holes of the suction gears to make the non-woven fabric closely fit outer surfaces of the suction gears, and fix the wavy folds; a press-flattening step, press-flattening the wavy folds; a preheating step, heating the non-woven fabric to soften it; a broadening step, stretching the non-woven fabric in a weft direction and making it be oriented, and straightening the wavy folds at the same time; a stabilizing step; and a cooling step, cooling the non-woven fabric to set it.