A fine fiber production method and a fine fiber production apparatus are provided. The fine fiber production method includes: discharging a flowable polymer compound from a discharge port provided at an extruder; forming fibers having a fiber diameter of from 50 nm to 15 μm by spraying, in a direction intersecting with a discharge direction of the flowable polymer compound, a pressurized gas from an air nozzle to the discharged flowable polymer compound, the air nozzle including a temperature control member and a spindle-shaped nozzle or a De Laval nozzle; and collecting the fibers using a collection member provided downstream in a gas spraying direction.

A multi-angle spinneret for forming hollow fibers is provided. The multi-angle spinneret includes a body defining a dope chamber, a bore needle channel, and multiple dope channels being oriented at a minimum of two distinct dope channel angles relative to the dope chamber. The body includes a bore needle disposed in the bore needle channel and oriented substantially perpendicular relative to the dope chamber. The bore needle extends though the dope chamber, such that a bore fluid flow through the bore needle is kept separate from a dope flow through the dope channels. A bore fluid outlet is positioned within a dope outlet of the dope chamber, such that a bore fluid flow out of the bore fluid outlet is substantially coaxial with and substantially centered within a dope flow out of the dope outlet.

The present invention relates to a particular execution for a die block for spun-blowing process for forming a fibers or filaments that may further form a spun-blown web or nonwoven comprising such a formed spun-blown web, e.g. as a layer in a multi-layer 5 composite web. The die block comprises nozzles that are readily removable, and preferably chamfered.

A cusp die for producing melt-blown non-woven fabric is provided, defining a sagittal plane, a main extension direction on the sagittal plane, a first flank and a second flank mutually bounded by the sagittal plane and including an ejection portion extending along the main extension direction and designed to convey, in use, polymeric fluid towards an external air blade, at least one extrusion pipe configured to convey the polymeric fluid towards the ejection portion, a plurality of holes arranged in the ejection portion, placed in fluidic through connection with the extrusion pipe and communicating with the outside, wherein the holes are arranged along at least one first row and a second row that are distinct and arranged respectively at the first flank and the second flank.

An apparatus for making nonwoven has a mesh belt moving in a horizontal direction and upstream and downstream spinnerets spaced apart in the direction above the belt and having downwardly opening tips at respective vertical spacings above the belt and each emitting fibers that are deposited at locations on the belt directly below the spinnerets to form thereon respective nonwoven layers. A support carrying the belt can be moved vertically and pivoted to orient the belt into a position forming an acute angle with respect to horizontal and thereby vary the spacings.

A method of delivering a health care active having the steps of administering to a mammal in need of a health benefit or a treatment for a health condition a personal health care article and consuming the article. The article contains one or more filaments that contain a backbone material, a health care active and optionally aesthetic agents, extensional aids, plasticizers, and crosslinking agents.

A plant for making melt-blown type non-woven fabric including a distributor including at least one main access for placing in fluid passage connection with a main conduit of a case for conveying polymeric fluid and a plurality of secondary accesses for placing in fluid passage connection each with a respective secondary conduit of the case for conveying gas; a dispenser in fluid passage connection with the distributor, for dispersing polymeric filaments from the polymeric fluid and including at least one spinneret for forming the polymeric filaments and an air blade for receiving gas to guide the polymeric filaments exiting the dispenser. The spinneret comprises includes a plurality of pinnacles flanked and each including a main outlet for conveying polymeric fluid. towards a respective delivery direction. The air blade is to convey gas jets to converge towards each delivery direction.

A method of delivering a health care active having the steps of administering to a mammal in need of a health benefit or a treatment for a health condition a personal health care article and consuming the article. The article contains one or more filaments that contain a backbone material, a health care active and optionally aesthetic agents, extensional aids, plasticizers, and crosslinking agents.

A fine fiber production method and a fine fiber production apparatus are provided. The fine fiber production method includes: discharging a flowable polymer compound from a discharge port provided at an extruder; forming fibers having a fiber diameter of from 50 nm to 15 m by spraying, in a direction intersecting with a discharge direction of the flowable polymer compound, a pressurized gas from an air nozzle to the discharged flowable polymer compound, the air nozzle including a temperature control member and a spindle-shaped nozzle or a De Laval nozzle; and collecting the fibers using a collection member provided downstream in a gas spraying direction.

A method includes applying pressure to a liquid feed of nanofiber material at a first nozzle of an array of nozzles having a first electrode voltage applied to a first electrode within an array of nozzles to form a first enlarged meniscus having a nanofiber attached, applying pressure to the liquid feed at a second nozzle having a second electrode voltage applied to a second electrode and adjacent the first nozzle within the array to form a second enlarged meniscus, increasing the second electrode voltage applied to the second electrode to a voltage level equal to voltage applied to the first electrode when the first and second enlarged menisci meet and form a combined meniscus with the nanofiber attached, decreasing the first electrode voltage to zero, and decreasing pressure on the liquid feed at the first nozzle to separate the first enlarged meniscus at the first nozzle from the second enlarged meniscus at the second nozzle having the nanofiber attached.