In the present disclosure, there are provided a polyethylene multifilament interlaced yarn having excellent weavability as well as enabling the manufacture of a protective product having high cut resistance and excellent fit by giving sufficient entanglements to the polyethylene multifilament yarn, and a method for manufacturing the same.

An aspirator provides linear control over air flow for manipulation of extruded fibers. A distribution manifold has a barrel valve between first and second flow channels, enabling precise, linear control over air flowing from a charge conduit to a pressure chamber surrounding a discharge pipe. Plural orifices in the discharge pipe connect the pressure chamber to the interior thereof, which is configured as a Venturi tube. Discharge pipe surfaces that can contact filaments therein are of hardened material while non-contact surfaces are of lighter materials.

An aspirator provides linear control over air flow for manipulation of extruded fibers. A distribution manifold has a barrel valve between first and second flow channels, enabling precise, linear control over air flowing from a charge conduit to a pressure chamber surrounding a discharge pipe. Plural orifices in the discharge pipe connect the pressure chamber to the interior thereof, which is configured as a Venturi tube. Discharge pipe surfaces that can contact filaments therein are of hardened material while non-contact surfaces are of lighter materials.

The invention relates to an interlacing nozzle (100) for the production of knotted yarns, interlaced yarn, of DTY or plain yarns with knots. The interlacing nozzle (100) comprises a yarn channel (1) with an air twist chamber (2). The air twist chamber (2) includes an injection port (4) for introducing air into the air twist chamber (2). A channel axis (M) extends in a yarn guiding direction (F). The yarn channel (1) comprises a channel width (21) transverse to the channel axis (M). The air twist chamber (2) comprises a chamber length (29) in the yarn guiding direction (F) and a chamber extension (28) transverse to this length. The chamber length (29) is at least 180% of the chamber extension (28), preferably at least 200% of the chamber extension (28), and preferably the chamber length (29) is at least 1.5 mm longer than the chamber extension (28).

The invention relates to an interlacing nozzle (100) for the production of knotted yarns, interlaced yarn, of DTY or plain yarns with knots. The interlacing nozzle (100) comprises a yarn channel (1) with an air twist chamber (2). The air twist chamber (2) includes an injection port (4) for introducing air into the air twist chamber (2). A channel axis (M) extends in a yarn guiding direction (F). The yarn channel (1) comprises a channel width (21) transverse to the channel axis (M). The air twist chamber (2) comprises a chamber length (29) in the yarn guiding direction (F) and a chamber extension (28) transverse to this length. The chamber length (29) is at least 180% of the chamber extension (28), preferably at least 200% of the chamber extension (28), and preferably the chamber length (29) is at least 1.5 mm longer than the chamber extension (28).

The invention discloses a twisted yarn, a twisted yarn production device and a twisted yarn production process. The twisted yarn is obtained from an air-covered yarn and a core-spun spandex yarn through doubling, twisting and winding. Compared with the prior art, the invention utilizes the feature that the air-covered yarn has rhythmic network points. After the air-covered yarn and the core-spun spandex yarn are made into a twisted yarn, the air-covered yarn can clamp the core-spun spandex yarn, thereby effectively preventing the retraction of the spandex in the core-spun spandex yarn.

Provided is a cut-resistant polyethylene yarn, and more particularly, a cut-resistant polyethylene yarn which allows manufacture of a product having both excellent cut resistance and excellent wear resistance.

Provided is a cut-resistant polyethylene yarn, and more particularly, a cut-resistant polyethylene yarn which allows manufacture of a product having excellent cut resistance and providing excellent wearability.

A method of making a ceramic fiber tow and the system regarding the same may be included. The method may include commingling a plurality of ceramic fibers with a fugitive fiber to form a single ceramic fiber tow. The fugitive fiber may be positioned between at least two ceramic fibers included in the single ceramic fiber tow. The method may further include forming a porous ceramic preform including at least the single ceramic fiber tow. The method may further include removing the fugitive fiber from the ceramic fiber tow leaving a space between at least two ceramic fibers of the single ceramic fiber tow. The method may further include replacing the spaces between ceramic fibers included in the ceramic fiber tows with a ceramic matrix.

A method of making a ceramic fiber tow and the system regarding the same may be included. The method may include commingling a plurality of ceramic fibers with a fugitive fiber to form a single ceramic fiber tow. The fugitive fiber may be positioned between at least two ceramic fibers included in the single ceramic fiber tow. The method may further include forming a porous ceramic preform including at least the single ceramic fiber tow. The method may further include removing the fugitive fiber from the ceramic fiber tow leaving a space between at least two ceramic fibers of the single ceramic fiber tow. The method may further include replacing the spaces between ceramic fibers included in the ceramic fiber tows with a ceramic matrix.