A production method of hemp fiber for spinning, the method including an immersion treatment process of immersing raw hemp fiber in a treatment liquid including water and at least one type of enzyme selected from the group consisting of protease enzymes and starch hydrolyzing enzymes for an immersion time of from 30 minutes to 60 minutes under a condition of a temperature of from 60° C. to 100° C., a water-washing process of washing the immersion treated hemp fiber with water, and a drying process of drying the water-washed hemp fiber.

A device for oiling a moving yarn includes a controller, a housing, an oil port provided in the housing, and a dosing pump arranged in the housing. A yarn guiding device with an oil transfer element is mounted in the housing. The oil transfer element is connected to the oil port by an oil feed channel via the dosing pump. A closure element and a flow sensor are provided in the oil feed channel. The oil feed channel has a first portion from the oil port to the dosing pump, a second portion from the dosing pump to the closure element, and a third portion from the closure element to the oil transfer element. The flow sensor is provided in the second portion of the oil feed channel.

A production apparatus and production method for colored spun yarn with fiber dyeing and mixing in a spinning process is provided. The production apparatus is a ring spinning machine. The ring spinning machine includes a front table board and a rear table board with a same structure. Each of the front table board and the rear table board is formed by a plurality of spindles with a same structure. Each spindle includes a drafting system. A roving feeding bell mouth is connected at the rear of the drafting system, and a splitting plate is arranged at the front of the drafting system. A dyeing system is arranged at the front of the splitting plate. A color fixing system is added at the front of the dyeing system. A bunching bell mouth device and a delivery roller pair are arranged at the front of the color fixing system.

Improved composite fibers, and structural materials mixed with the improved composite fibers, are produced by an improved process that vertically texturizes and impregnates resin into the fibers without introducing any substantial amount of microbubbles in the resin. By using vertical impregnation and twisting of fiber strands with specific viscosity control, stronger composite fibers, in which substantially no microbubbles are trapped, are produced with improved tensile strength and lower variance in tensile strength, for use in strengthening structural concrete and other structural materials.

Improved composite fibers, and structural materials mixed with the improved composite fibers, are produced by an improved process that vertically texturizes and impregnates resin into the fibers without introducing any substantial amount of microbubbles in the resin. By using vertical impregnation and twisting of fiber strands with specific viscosity control, stronger composite fibers, in which substantially no microbubbles are trapped, are produced with improved tensile strength and lower variance in tensile strength, for use in strengthening structural concrete and other structural materials.

A spinning machine having several spinning positions, the spinning machine having an air flow supply unit for providing compressed air and/or suction air at the spinning positions and a drafting system support extending along the spinning positions, for detachably arranging drafting systems at the spinning positions. In order to provide a spinning machine that allows compressed air and/or suction air to be supplied to the spinning positions in an energy-efficient manner, it is provided that the drafting system support is designed as a longitudinally channeled tube body having a flow connection to the air flow supply unit and having connection openings assigned to the individual spinning positions.

A method of producing a hemp-blended single spun yarn may include: a fiber blending step of passing hemp fiber, together with latent crimped yarn fiber, through an opener in order to increase the cohesion of the hemp fiber by the three-dimensional chain structure, thereby producing a blended fiber including 10% to 60% latent crimped yarn fiber; a sliver production step of carding the blended fiber through a carding machine, and drafting the carded fiber through a drafting machine, thereby producing a sliver; and a spinning step of supplying the sliver as a roving yarn through a plurality of rollers to a twisting unit, and supplying a combined filament yarn, produced by twisting and having a structure in which a low-stretchability filament yarn surrounds a high-stretchability filament yarn, as a core yarn to the twisting unit without being passed through the plurality of rollers.

The present invention generally relates to the production of knitted caps that are lightweight and breathable. Generally, the manufacturing process for producing the knitted caps involves: (1) applying a continuous wax coating onto a polyester yarn; (2) twisting the yarn with one or more additional yarns to produce a twisted yarn; (3) knitting the twisted yarn into a knitted article; (4) sewing the knitted article into a headwear body; and (5) finishing the headwear body to form the headwear article. The resulting headwear articles can be in the form of caps that exhibit superior breathability and moisture wicking capabilities.

A method is provided for operating an air spinning machine with a multiple number of spinning units, whereas each spinning unit has a spinning nozzle with an internal vortex chamber. The spinning nozzle is fed a fiber composite during the operation of the spinning unit. The spinning nozzle has a multiple number of air nozzles leading into the vortex chamber through which compressed air streams into the vortex chamber in order to generate a vortex air flow within the vortex chamber. The fiber composite receives a twist with the assistance of the vortex air flow within the vortex chamber such that a yarn is formed from the fiber composite. The air spinning machine features an additive supply, whereby an additive is at least temporarily fed a part of the spinning units. A liquid additive is used, whereas the additive is degassed prior to leaving the additive supply. In addition, an air spinning machine with a degassing device is described.

Composite fibers created by a process including vertically texturizing and impregnating resin into the fibers at controlled viscosity results in stronger fibers in which virtually no microbubbles are trapped resulting in improved tensile strength for use in reinforcing concrete and other materials.