Multilayer nonwoven fabric made with poly-propylene and polyethylene
AssigneeKimberly-Clark Corporation
InventorRalph V. Braun
Life of this patent
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Abstract
A nonwoven fabric is disclosed which comprises at least two layers of nonwoven web adjacent to and bonded to each other. Each web comprises a plurality of monofilaments of a thermoplastic material. In one of the webs, the thermoplastic material is polypropylene. In another of the layers, the thermoplastic material is polyethylene. Advantages of this combination of nonwoven webs comprising these polymers in layers in a multilayer nonwoven fabric are disclosed which include increased softness and tensile strength.
Claims24
A multilayer nonwoven fabric comprising:
- a first nonwoven web comprising a plurality of substantially identically prepared continuous and substantially randomly deposited polyethylene monofilaments;
- and
- a second nonwoven web which is adjacent and bonded to said first nonwoven web, said second nonwoven web comprising a plurality of substantially identically prepared continuous and substantially randomly deposited polypropylene monofilaments.
A multilayer nonwoven liner for a disposable diaper which comprises:
- a first nonwoven web comprising a plurality of substantially identically prepared continuous and substantially randomly deposited polyethylene monofilaments;
- and
- a second nonwoven web which is adjacent and bonded to said first nonwoven web, said second nonwoven web comprising a plurality of substantially identically prepared continuous and substantially randomly deposited polypropylene monofilaments.
A multilayer nonwoven wrap for a catamental device which comprises:
- a first nonwoven web comprising a plurality of substantially identically prepared continuous and substantially randomly deposited polyethylene monofilaments;
- and
- a second nonwoven web which is adjacent and bonded to said first nonwoven web, said second nonwoven web comprising a plurality of substantially identically prepared continuous and substantially randomly deposited polypropylene monofilaments.
In an absorbent article which comprises a liner and an absorbent batt, the improvement comprising employing as the liner a multilayer nonwoven fabric comprising a first nonwoven web comprising a plurality of substantially identically prepared continuous and substantially randomly deposited polyethylene monofilaments;
- and a second nonwoven web which is adjacent and bonded to said first nonwoven web, said second nonwoven web comprising a plurality of substantially identically prepared continuous and substantially randomly deposited polypropylene monofilaments.
In a process for forming a nonwoven fabric which process comprises:
- continuously extruding polypropylene through a spinneret having a plurality of orifices to form discrete polypropylene monofilaments;
- drawing the polypropylene monofilaments;
- and
- depositing the polypropylene monofilaments in a substantially random manner to form a polypropylene nonwoven web;
- the improvement comprising:
- continuously extruding polyethylene through a spinneret having a plurality of orifices to form discrete polyethylene monofilaments;
- drawing the polyethylene monofilaments;
- and
- depositing the polyethylene monofilaments in a substantially random manner to form a polyethylene web;
- bonding the polyethylene web to the polypropylene web to thereby form a multilayer nonwoven fabric.
Dependencies are inferred from the claim text.