Fibrous structures that exhibit a novel combination of properties and to methods for making such fibrous structures are provided.

Fibrous structures and methods for making same

Surgical clip advancement mechanism

Disclosed are water-dispersible fibers derived from sulfopolyesters having a Tg of at least 25° C. The fibers may contain a single sulfopolyester or a blend of a sulfopolyester with a water-dispersible or water-nondispersible polymer. Also disclosed are multicomponent fibers comprising a water dispersible sulfopolyester having a Tg of at least 57° C. and a water non-dispersible polymer. The multicomponent fibers may be used to produce microdenier fibers. Fibrous articles may be produced from the water-dispersible fibers, multicomponent fibers, and microdenier fibers. The fibrous articles include water-dispersible and microdenier nonwoven webs, fabrics, and multilayered articles such as wipes, gauze, tissue, diapers, panty liners, sanitary napkins, bandages, and surgical dressings. Also disclosed is a process for water-dispersible fibers, nonwoven fabrics, and microdenier webs. The fibers and fibrous articles have further applications in flushable personal care and cleaning products, disposable protective outerwear, and laminating binders.

Water-dispersible and multicomponent fibers from sulfopolyesters

A water non-dispersible polymer microfiber is provided comprising at least one water non-dispersible polymer wherein the water non-dispersible polymer microfiber has an equivalent diameter of less than 5 microns and length of less than 25 millimeters. A process for producing water non-dispersible polymer microfibers is also provided, the process comprising: a) cutting a multicomponent fiber into cut multicomponent fibers; b) contacting a fiber-containing feedstock with water to produce a fiber mix slurry; wherein the fiber-containing feedstock comprises cut multicomponent fibers; c) heating the fiber mix slurry to produce a heated fiber mix slurry; d) optionally, mixing the fiber mix slurry in a shearing zone; e) removing at least a portion of the sulfopolyester from the multicomponent fiber to produce a slurry mixture comprising a sulfopolyester dispersion and water non-dispersible polymer microfibers; and f) separating the water non-dispersible polymer microfibers from the slurry mixture. A process for producing a nonwoven article is also provided.

Nonwovens produced from multicomponent fibers

The present invention provides a nonwoven web prepared from multicomponent fibers which are partially split. The partially split multicomponent fibers have at least one component of the multicomponent fiber separated from the remaining components of the multicomponent fiber along a first section of the longitudinal length of the multicomponent fibers. Along a second section of the longitudinal length of the multicomponent fibers the components of the multicomponent fibers remain together as a unitary fiber structure. In addition, part of the second section of the multicomponent fibers is bonded to part of a second section of an adjacent multicomponent fiber.

Nonwoven web and filter media containing partially split multicomponent fibers

The invention teaches a hydroentangled integrated composite nonwoven material, comprising a mixture of randomized continuous filaments, splittable shortcut staple fibres, and optional non-splittable staple fibres. The splittable fibres should be 3-16 mm long bicomponent fibres. Preferably there should be no thermal bonding points between the filaments. The nonwoven material has improved textile feeling and reduced twosidedness. The continuous filaments should preferably be spunlaid filaments. Some of the staple fibres can be coloured. The invention also teaches a process for a hydroentangled integrated composite nonwoven material, comprising forming a web of randomized continuous filaments on a forming fabric, providing an aqueous fibre dispersion comprising splittable shortcut staple fibres with a length of 3-16 mm, preferably 3-10 mm, more preferably 3-7 mm, wetlaying the aqueous fibre dispersion on said web of said continuous filaments, thus forming a fibrous web comprising said continuous filaments and splittable shortcut staple fibres, and subsequently hydroentagling the fibrous web to form a hydroentangled nonwoven material, where the major part of the splittable fibres is split during the dispersion preparation or hydroentanglement process steps.

Hydroentangled split-fibre nonwoven material

The invention teaches an improved hydroentangled integrated composite nonwoven material, comprising a mixture of randomized continuous filaments, and synthetic staple fibres, where there are no thermal bonding points between the continous filaments, which nonwoven material exhibits a cumulative pore volume, measured by PVD in n-hexadecane, in the pore radius range5 - 150 µm, where at least 70% of the cumulative pore volume is in the pores with a pore radius above 45 µm. The nonwoven material also exhibits a cumulative pore volume, which when the synthetic staple fibres are chosen from the group of polyethylene, polypropylene, polyester, polyamide, and a polylactide staple fibres is at least 9 mm3/mg, and when the synthetic staple fibres are lyocell staple fibres is at least 6 mm3/mg. The hydroentangled nonwoven material comprises 20-80%, preferably 30-60%, continuous filaments, and 20-80%, preferably 40-70%, synthetic staple fibres, all percentages calculated by weight of the total nonwoven material. No natural fibres should be comprised in the nonwoven material.

Hydroentangled integrated composite nonwoven material

A nonwoven material consisting of a mixture containing continuous filaments and short fibres, the continuous filaments being substantially mechanically bonded to each other due to entangling of fibres and filaments. The continuous filaments in the material have a projected coverage of at least 1.1 and not more than 1.7. The invention also relates to a method of manufacturing such a nonwoven material.

Composite nonwoven material containing continuous filaments and short fibres

A method of adding a chemical additive to a fiber web of nonwoven material including cellulose pulp fibers and synthetic fibers and/or filaments. A hydrojet liquid including the chemical additive is used in at least one hydrojet treatment step, which includes at least one vacuum collecting box. The hydrojet liquid is applied to the fiber web for penetrating the fiber web at a pressure of at least 5 bar but not more than 100 bar, in such a manner so that the chemical additive is penetrated into the fiber to fiber intersections of the nonwoven material.

Method for adding chemicals to a nonwoven material

Method of adding a softening and/or debonding agent to a fiber web of a hydroentangled nonwoven material comprising cellulose pulp fibers. The softening and/or debonding agent is added in an inline manufacturing process of the hydroentangled nonwoven material, subsequent to the hydroentanglement of the nonwoven material. The softening and/or debonding agent is added via a size press or a foulard comprising a soaking step to soak the hydroentangled nonwoven material with the added softening and/or debonding agent, and a pressing step, which causes the added softening and/or debonding agent to penetrate and impregnate the hydroentangled nonwoven material.

Method for adding a softening and/or debonding agent to a hydroentangled nonwoven material

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