Coform nonwoven web and method of making same
OwnerDavid Michael Matela, Darryl Franklin Clark +2inventors
InventorsDavid Michael Matela, Darryl Franklin Clark, Matthew Boyd Lake, Bryan David Haynes
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Abstract
A coform nonwoven web from multicomponent meltblown filaments and an absorbent, wherein the absorbent material is substantially uniformly dispersed in the z-direction is disclosed. A process of preparing the coform nonwoven web by perturbing the meltblown filaments as they are being produced is also disclosed. The coform material can be used in a variety of absorbent articles such as diapers as the primary liquid retention layer. In addition, the coform nonwoven web can be used in a variety of other articles such as wipes.
Claims40
A coform nonwoven web having a substantially uniform structure comprising
- a plurality of substantially continuous multicomponent thermoplastic filaments;
- and
- a second material selected from the group consisting of fibers, particles, and a mixture of fibers and particles, wherein the second material is substantially uniformly dispersed within the multicomponent thermoplastic filaments in the z-direction of the coform nonwoven web.
A method of preparing the nonwoven web having a substantially uniform structure comprising a plurality of substantially continuous multicomponent thermoplastic filaments;
- and a second material selected from the group consisting of fibers, particles, and a mixture of fibers and particles, wherein the second material is substantially uniformly dispersed within the multicomponent thermoplastic filaments in the z-direction of the coform nonwoven web, said method comprising
- a. providing a first die;
- b. extruding liquefied resin components of the multicomponent thermoplastic filaments through a plurality of orifices in the first die in the direction of a first axis;
- c. attenuating the liquefied resin component of the multicomponent thermoplastic filaments into a plurality of discrete filaments by subjecting the liquefied resin components to a first fluid stream directed in the direction of the first axis along both sides of the orifices, wherein the orifices are locate adjacent to the first fluid stream, the first fluid stream has a fluid pressure and the first fluid stream is perturbed by varying the fluid pressure of the first fluid stream on both sides of the orifices;
- d. introducing the second material into the first fluid stream to form a mixture of multicomponent thermoplastic filaments and second material;
- and
- e. depositing the mixture onto a forming surface to form a coform nonwoven web.
Dependencies are inferred from the claim text.