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TRANSVERSELY STRETCHED NONWOVEN FABRIC WITH HIGH TENSILE STRENGTH STRETCHED SEVEN TIMES WIDER OR MORE IN TRANSVERSE DIRECTION
TRANSVERSELY STRETCHED NONWOVEN FABRIC WITH HIGH TENSILE STRENGTH STRETCHED SEVEN TIMES WIDER OR MORE IN TRANSVERSE DIRECTION
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机译:横向拉伸的非织造布,拉伸方向拉伸强度高过拉伸时间的两倍或更多
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摘要
PURPOSE: To increase the transverse draw ratio, as the tensile strength of the transversely drawn woven fabric in the transverse direction is retained, when a raw fabric web comprising a plurality of filaments is transversely drawn to produce the transversely drawn nonwoven fabric. CONSTITUTION: The raw fabric web 1 at is preliminarily heated in the preheater 22 and drawn at a draw ratio of 1.2-3 transversely in the first transverse drawing unit 23, as the raw fabric web 1 is held at both of the ends of the web with a pair of drawing pulleys and a circulation belt and is exposed to the hot air from the hot air out-blowing outlet 11 and heated up to 5deg.C higher than the temperature suitable for drawing. Then, in the second transverse drawing unit 25, the web 1 is further transversely drawn, as it is held at both of the edges with a pair of.the drawing pulleys and the circulation belt and is heated at the temperature suitable for drawing with the hot air from the hot air outlets 5a-5g whereby the objective transversely nonwoven fabric 12 that is totally drawn at a draw ratio of = 7 in the transversely direction and has a transverse tensile strength of = 1.5 g/d is obtained.
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