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.

The present invention provides a fiber manufacturing method suitable for reducing the variation in outer diameter. The fiber manufacturing method of an embodiment of the present invention includes: discharging a softened linear body 1 through a nozzle 10; and winding the linear body 1 so that the linear body 1 passes through a cooling portion 20 supplied with a cooling fluid 50, thereby obtaining a fiber 5. The cooling portion 20 has a filter 40 configured to rectify the cooling fluid 50. The cooling fluid 50 in the cooling portion 20 has a temperature that is substantially constant in a moving direction of the linear body 1. According to the fiber manufacturing method of the embodiment, an index M determined by the following equation (I) is 1.52 or less.

[00001]$\begin{array}{cc}\text{M}\left[-\right]\text{=}\frac{\text{K}}{\text{π}}\frac{{\text{Q}}_{\text{a}}}{\text{L}}\frac{\text{1}}{\left({\text{T}}_{\text{w}}-{\text{T}}_{\text{a}}\right)}{\left(\frac{{\text{D}}_{\text{f}}}{{\text{D}}_{\text{n}}}\right)}^{\text{2}}\text{U}& \text{­­­(I)}\end{array}$

The present invention provides a fiber manufacturing method suitable for reducing the variation in outer diameter. The fiber manufacturing method of an embodiment of the present invention includes: discharging a softened linear body 1 through a nozzle 10; and winding the linear body 1 so that the linear body 1 passes through a cooling portion 20 supplied with a cooling fluid 50, thereby obtaining a fiber 5. The cooling portion 20 has a filter 40 configured to rectify the cooling fluid 50. The cooling fluid 50 in the cooling portion 20 has a temperature that is substantially constant in a moving direction of the linear body 1. According to the fiber manufacturing method of the embodiment, an index M determined by the following equation (I) is 1.52 or less.

[00001]$\begin{array}{cc}\text{M}\left[-\right]\text{=}\frac{\text{K}}{\text{π}}\frac{{\text{Q}}_{\text{a}}}{\text{L}}\frac{\text{1}}{\left({\text{T}}_{\text{w}}-{\text{T}}_{\text{a}}\right)}{\left(\frac{{\text{D}}_{\text{f}}}{{\text{D}}_{\text{n}}}\right)}^{\text{2}}\text{U}& \text{­­­(I)}\end{array}$

The present application relates to the technical field of fiber spinning molding, and particularly to a preparation method of an ultra-high molecular weight polyethylene fiber, a spinneret assembly and a multifilament yarn. The spinneret assembly includes a housing, a plate body and an extrusion hole provided in the plate body. The extrusion hole includes a pressurized inlet segment and an outlet segment connected to an end of the pressurized inlet segment. An inner diameter of the pressurized inlet segment is gradually decreased from one end away from the outlet segment to the other end, and the inner diameter of the outlet segment is constant.

The present application relates to the technical field of fiber spinning molding, and particularly to a preparation method of an ultra-high molecular weight polyethylene fiber, a spinneret assembly and a multifilament yarn. The spinneret assembly includes a housing, a plate body and an extrusion hole provided in the plate body. The extrusion hole includes a pressurized inlet segment and an outlet segment connected to an end of the pressurized inlet segment. An inner diameter of the pressurized inlet segment is gradually decreased from one end away from the outlet segment to the other end, and the inner diameter of the outlet segment is constant.

The present invention relates to the technical field of polyamide materials, and provides a polyamide 56 pre-oriented yarn and a polyamide 56 draw textured yarn with a low shrinkage in boiling water, a process for producing the same and a use thereof. The raw materials for producing the polyamide 56 fiber comprise 1,5-pentane diamine and adipic acid, or a polyamide 56 resin obtained by polymerizing 1,5-pentane diamine monomer and adipic acid monomer; wherein the polyamide 56 fiber has a shrinkage in boiling water of 9% or less, wherein the polyamide 56 fiber comprises a polyamide 56 pre-oriented yarn with a low shrinkage in boiling water and a polyamide 56 draw textured yarn with a low shrinkage in boiling water. The polyamide 56 fiber has good mechanical properties, dyeing uniformity and dimensional stability. The process for producing the polyamide 56 fiber does not require modification to existing equipments for texturing polyamide fibers and thus reduces production costs.

The present invention relates to a thermoplastic elastomer yarn with improved unwinding, weaving and yarn shrinking property, and a manufacturing method thereof. According to the present invention, the thermoplastic elastomer yarn according to the present invention is excellent in improved unwinding, weaving and yarn shrinking property. Furthermore, the thermoplastic elastomer yarn according to the present invention is excellent in yarn shrinkage rate, unwinding, weaving, tensile strength and elongation rate to be adequate for manufacturing textile fabric and footwear in terms of physical properties.

A spunbonded nonwovens is made by first spinning thermoplastic continuous filaments and emitting them from a spinneret in a direction and then passing the filaments in the direction through a cooling chamber. Meanwhile cooling air is fed from respective manifolds flanking the chamber into the chamber to cool the filaments and the cooling air is guided into the manifolds through respective manifolds and through respective planar homogenizing elements each having a plurality of openings forming a free open surface area constituting 1 to 40% of the total surface area of the respective planar homogenizing element. The cooling air passes from the planar homogenizing element into the cooling chamber through a flow straightener.

A laminate is made by first making by melt-blowing or spunbonding of multicomponent, thermoplastic, and endless filaments a first nonwoven layer lying generally in a plane and having a predetermined shrinkage capacity or potential parallel to the plane and making of thermoplastic and endless filaments a second nonwoven layer also lying generally in a respective plane and having a shrinkage capacity or potential that is smaller than that of the first nonwoven layer. The two layers are directly juxtaposed flatly on each other, and the directly juxtaposed first and second layer are bonded together only at bonded regions while leaving an array of unbonded regions distributed over a surface of the two bonded-together nonwoven layers. Then only the first nonwoven layer is shrunk so that the second layer bunches in the unbonded regions and is there raised transverse to a plane of the bonded-together layers.

A laminate is made by first making by melt-blowing or spunbonding of multicomponent, thermoplastic, and endless filaments a first nonwoven layer lying generally in a plane and having a predetermined shrinkage capacity or potential parallel to the plane and making of thermoplastic and endless filaments a second nonwoven layer also lying generally in a respective plane and having a shrinkage capacity or potential that is smaller than that of the first nonwoven layer. The two layers are directly juxtaposed flatly on each other, and the directly juxtaposed first and second layer are bonded together only at bonded regions while leaving an array of unbonded regions distributed over a surface of the two bonded-together nonwoven layers. Then only the first nonwoven layer is shrunk so that the second layer bunches in the unbonded regions and is there raised transverse to a plane of the bonded-together layers.