Method for producing nonwoven fabric and nonwoven fabric
AssigneeSuominen Oyj
InventorsMiika Nikinmaa, Avinav G. Nandgaonkar
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Abstract
According to an aspect of the present invention, there is provided a method for producing a nonwoven fabric, the method comprising the steps of providing fibres comprising 10-100 wt-% of bast fibres, the bast fibres having at least one angle of at least 20°, and the bast fibres having an average fibre length of 10-60 mm; carding the fibres and forming a web of fibres on a wire support; hydroentangling the formed web by using at least a first and a second hydroentangling unit, wherein a hydroentanglement energy in the first hydroentangling unit is lower than the hydroentanglement energy in the second hydroentangling unit; dewatering the hydroentangled web; and drying the dewatered web at a temperature of 105-125° C.
Claims17
A method for producing a nonwoven fabric, the method comprising the steps of:
- providing fibres comprising 10-100 wt-% of bast fibres, the bast fibres having at least one angle of at least 20°, wherein the angle is an angle measured within a single fiber, and the bast fibres having an average fibre length of 10-60 mm,
- carding the fibres and forming a web of fibres on a wire support,
- hydroentangling the formed web by using at least a first and a second hydroentangling unit, wherein a cumulative hydroentanglement energy in the first hydroentangling unit is lower than a cumulative hydroentanglement energy in the second hydroentangling unit, and wherein the cumulative hydroentanglement energy in the first hydroentangling unit is 20-40% of the total hydroentanglement energy used to form the nonwoven,
- dewatering the hydroentangled web, and
- drying the dewatered web at a temperature of 105-125° C.
A method for producing a nonwoven fabric, the method comprising the steps of:
- providing fibres comprising 10-100 wt-% of bast fibres, the bast fibres defining only one angle per fiber of at least 20°, wherein the angle is an angle measured within a single fiber, and the bast fibres of the nonwoven fabric having an average fibre length of 20-60 mm,
- carding the fibres and forming a web of fibres on a wire support,
- hydroentangling the formed web by using at least a first and a second hydroentangling unit, wherein a hydroentanglement energy in the first hydroentangling unit is lower than the hydroentanglement energy in the second hydroentangling unit,
- dewatering the hydroentangled web, and
- drying the dewatered web.
Dependencies are inferred from the claim text.