Effect of voltage and gauge of static electricity plate on nep of card sliver

A self-made web cleaner with electrostatic plate was installed on the back plate of a carding machine.The card sliver produced under different conditions was tested by USTER AFIS.The results show that this device can reduce the content and size of neps under appropriate gauge and voltage.When the gauge between electrostatic plate and cylinder is(1 mm),a scheme with(1 500 V) voltage is more effective,the content and size of neps are 6.9% and 5.7% respectively,which is less than those when no voltage is applied.The content and size of seed coat neps(SCN) reduce 42.9% and 4.0% respectively.When the gauge is(2 mm),a scheme with(4 000 V) voltage is effective,the content and size of neps reduce 8.7% and 5.5% respectively.The content and size of seed coat neps(SCN) reduce 25% and 4.3% respectively.When the gauge is(3 mm),the content and size of neps and SCN don′t improved under any voltage of this experiment in comparison with those when no voltage is applied.