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Method for production of a hydroentangled airlaid web and products obtained therefrom

  • US 9,394,637 B2
  • Filed: 07/16/2013
  • Issued: 07/19/2016
  • Est. Priority Date: 12/13/2012
  • Status: Active Grant
First Claim
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1. A method for production of a nonwoven web, comprising:

  • preparing a homogeneous dry mixture of defibrated natural cellulose fibers and staple fibers;

    passing the homogeneous dry mixture through a perforated cylinder onto a foraminous carrier to airform the mixture to obtain at least one homogeneous airlaid web;

    hydroentangling the airlaid web on the foraminous carrier to consolidate the web on at least one side; and

    drying the hydroentangled web to obtain the nonwoven web;

    whereinthe airforming and hydroentangling is conducted in a continuous operation,a content of the natural cellulose fibers in the mixture of fibers is no less than 50% by weight and a content of the staple fibers is no more than 50% by weight,no binder, adhesive or thermal bonding fibers are utilized,a fiber length of the natural cellulose fibers is no more than 3.5 mm,a fiber length of the staple fibers is no less than 8.0 mm,a basis weight of the nonwoven web is from 20 g/m2 to 100 g/m2, anda thickness of the nonwoven web is from 0.25 mm to 2 mm.

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