Question 41 (Textile Engineering & Fibre Science)
A needle loom, having a needle board with 2000 needles/m, is operating at a stroke frequency of 2000 strokes/min and producing a needle-punched nonwoven fabric at 5 m/min. The punch density, in number of punches per cm2, is __79 to 81__.
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Given in the question–
Needles/meter=2000
Stroke frequency=2000 strokes/min
Speed of fabric=5 m/min
Punch density(punches/cm2)=?
Calculation–
Punch density=(Needles/meter x stroke frequency(stokes/min)) / speed of fabric(m/min)
Punch density=(2000 x 2000)/5
Punch density=80 x 104 punches/m2
Punch density=80 x 104/104 punches/cm2
Punch density=80 punches/cm2 (Answer)