A continuous strand for a wig including a plurality of filaments and repeatedly forming a gradient thickness section along a length direction and a wig manufactured using the same

Abstract

A continuous strand for a wig and a wig using the same are disclosed, which include: a PN section extending in a length direction and having a first cross-sectional area of a constant size; two first PT sections respectively extending from both ends of the PN section and tapering in a manner that the cross-sectional area is reduced; two second PT sections respectively extending from the ends having the reduced cross-sectional area of the two first PT sections and tapering in a manner that the reduced cross-sectional area is increased again, and two PC sections (connecting sections of PT-PN-PT repeating unit sections) connecting the first PT sections and the second PT sections adjacent to each other and having a second cross-sectional area of a constant size. The continuous strand can achieve an MS-PT effect that occupies a large proportion of wig cosmetic characteristics without manual work.

Description

Technical Field

[0001] The present invention relates to a continuous strand for a wig comprising a plurality of filaments and a wig made therefrom. Specifically,

[0002] The present invention relates to a continuous strand for wigs and wigs made therefrom, which has gradient thickness sections at constant or irregular intervals along the length direction, namely the so-called sharp "pencil taper sections" (pencil taper sections).

[0003] (PT) section) or the so-called non-aligned effect. Background Art

[0004] Important properties required of wigs (including those for dolls) are beauty, convenience, and economic efficiency. While there may be some differences depending on fashion and regional changes, there is a PT effect (Pencil Tapering Shape Effect) that can achieve these beauty properties by adding volume to the top portion of the wig connected to the wearer's real hair, maintaining a neat fit at the bottom end farthest from the wearer's scalp, and enhancing the naturalness of the overall style.

[0005] The term "pencil shape" is commonly used in this field to refer to non-alignment. This term refers to the gradient thickness (lengthwise = X-axis) along the tapered end portion of a pencil where the lead is exposed. This term also refers to the gradient thickness of a strand used for wigs, which results from a reduction in the number of filaments in the strand. This is used to describe the engineering characteristics performed by wig factories to achieve the PT effect. To illustrate this point, the currently sought-after hairstyle is one in which the ends of the hair are not trimmed to a uniform length using scissors or other tools, but rather a V-shaped gradient (variable length) at the ends. This creates a natural, stylish, and neat hairstyle. Specifically, the current trend is to achieve volume at the top of the hair and a neatness at the bottom.

[0006] Wigs made from human hair are expensive products and are therefore produced in small batches, and during the process of collecting human hair,

[0007] Human hair has its own length gradient characteristics. If it is a wig for bald heads, it is produced in small batches, so the gradient length can be achieved by cutting the hair one by one with tooth scissors. In this way, if mass production is required, in the manufacturing process of synthetic fiber wigs, in order to show the PT effect, it is very difficult to thin all the filaments (usually single filaments) one by one with tooth scissors and commercialize it in terms of cost. Specifically, the filaments of the same length that have been roughly cut are combed with a carding machine (a large comb), and the filaments are staggered in a non-aligned state in both directions of the filament length. By folding the center portion of these filaments (based on the length direction), the gradient length effect is achieved from the baseline connected to the center portion of the scalp when worn, thereby pursuing the simplification of the production process. The PT effect obtained in this way is generally referred to as the so-called "pencil shape effect" in the art. Currently, there is a growing trend to make the end portion of the filament look sharper. For example, recently, a two-layer pencil shape, in which the center portion of filaments with two different length groups overlaps each other in the length direction, has been developed using a carding machine to create a sharper PT effect. Furthermore, multi-layer pencil shapes (also known as MS-PT: 'Multi-Step-Pencil Tapering Sharpness'), such as a three-layer (long, medium, short) pencil shape, are also emerging.

[0008] This trend has also spread to items before wigs, and even the most basic item for black wigs - ordinary aligned braid (braid without tapered PT segments) is changing to non-aligned braid (also known as pre-stretched braid in the field). Aligned braid refers to braid without the PT effect due to the pencil shape of the carding machine, that is, without the gradient length effect. The final consumer has to take a constant amount of aligned braid and clumsy manual work (pencil shape with fingers:

[0009] stretching by fingers) to achieve a pencil shape effect, thus showing a slight PT effect.

[0010] As such, achieving a PT effect through pencil-shaped work is labor-intensive, requiring significant time and effort, and requires considerable skill to achieve a uniform, symmetrical effect. The end locking of the resulting composite yarn product group through this pencil-shaped work is unstable and unsightly because the included filaments (typically single filaments) protrude (expose) from the PT segment. Furthermore, because the PT segment at the bottom end is constructed with a gradually decreasing number of filaments, the drape of the finished yarn after braiding or twisting deteriorates. In other words, the yarn does not feel entangled with the wearer's body lines, but rather appears to be scattered, leading to instability.

[0011] Furthermore, the pencil-shaped PT effect of conventional carding machines causes fine hair to protrude from the bottom end of box braids and Senegal twists, which are finished products worn by braiding and twisting. This defeats the purpose of achieving a neat, sharp bottom end. To address this issue, end consumers or hairdressers perform a separate trimming process to sink the fine hair by immersing the hair in hot water. However, depending on the type of filament, such as polypropylene (PP) filament, the fine hair does not sink at all, making it difficult to prevent the filaments at the bottom end from becoming tangled and intertwined.

[0012] Furthermore, if the pencil shape is not carefully applied, the symmetry of the carding machine can be uneven, which can compromise the beauty of the product. This lack of skill significantly impacts the quality of the product and, since it is a labor-intensive process for mass production, significantly impacts production costs. For specialized fabrics, such as textured strands that cannot be grouped using the pencil shape, a method other than the pencil shape must be found to achieve MS-PT.

[0013] In HWS (hot water straightening offilaments), which are used to straighten the protruding fine hairs at the bottom end of a strand, the protruding fine hairs (filaments) are spread out in the length direction and become neat, thereby achieving a cosmetic effect. However, since the texture imparted to the filaments in the strands is also spread out, the porosity obtained by the texture is reduced, and the apparent density (bulk density) increases, thereby compromising the bulkiness (lightness), ultimately having a negative impact on economy, convenience, and, on the other hand, cosmetic properties. In other words, in order to achieve the required coverage volume for consumers to achieve the desired hairstyle, there are the following problems: the purchase cost increases, and as the weight per unit volume, i.e., the apparent density, increases, the load applied to the scalp also increases. Depending on the polymer component that constitutes the filament, HWS cannot be performed, and only certain types of polymer filaments can achieve the HWS effect. In particular, it is difficult to achieve the HWS effect with filaments that are mostly composed of highly crystalline polymers.

[0014] In the case of special braids, i.e., finished braids designed to have certain functions, the desired hairstyle is achieved by misaligning and subdividing the filaments (weighing and removing a portion) before manufacturing the special braid. Some special braids with tightly kinky strands or thick strands of filaments cannot be carded, thus posing the problem of not achieving the PT effect. Recently popular special braids also pursue the PT effect.

[0015] As can be seen from the inventor's Korean Invention Patent No. 2078793, existing continuous knot and spiral-shaped strands in the art have an inherent tapering effect, but unfortunately, they fail to exhibit the MS-PT (Smooth & Long Tapering) effect, which would provide a positive aesthetic effect. In particular, when the filament-bonded strands have a flat, i.e., square, cross-section, they lack the inherent tapering effect. Even when the filament-bonded strands have a circular cross-section and a smooth cylindrical surface, where the rotational force imparted during the manufacturing process is invisible (i.e., there is no tornado effect), the inherent tapering effect is not significant. This significantly limits the ability of wig products to achieve aesthetically pleasing results.

[0016] Furthermore, there is a need for continuous filament strands that exhibit partially different sensations.

[0017] In various industries outside the wig industry, continuous strands are produced by braiding or twisting and then applied to products such as cords. However, in the wig industry, these products give the impression of being bulky, like hanging a cord with no aesthetic value. Therefore, in the wig industry, commercialization has been limited to using a hand-made process called a pencil shape to create a gradient length effect. Furthermore, the trend toward two-layer and three-layer hand-made pencil shapes, which extend the pencil gradient (tapered) section, is gaining momentum. As this trend spreads worldwide, there is a need for an alternative to continuous strands for wigs that can effectively achieve the aesthetic effects desired by the market. Summary of the Invention

[0018] Technical issues

[0019] Therefore, an object of the present invention is to provide a continuous strand for a wig, which can achieve the MS-PT (Smooth & Long Tapering) effect, which accounts for a large proportion of cosmetic properties, without requiring labor-intensive manual work, and does not rely on a gradient length effect (an effect in which filaments have different lengths from each other in the strand length direction based on a reference line), and has excellent aesthetics in that the end portions of simple strands and composite strands (generally, composite strands that can be formed by braiding and / or cross-twisting simple strands) formed by rotational twisting have no or minimized protrusion of filaments.

[0020] Another object of the present invention is to provide a continuous strand for a wig, which can achieve a multi-step pencil taper effect (PTE, so-called pencil shape effect) without labor-intensive manual work, and has no or minimized protrusion of filaments at the end portion of the strand, thereby having excellent aesthetics.

[0021] Yet another object of the present invention is to provide a continuous strand for a wig, wherein PT segments having a pencil taper effect (PTE) are symmetrically repeated in the length direction (i.e., X direction or MD direction) by imparting a gradient of deformation shape or dimensions (i.e., thickness, width, cross-sectional area) of the segments at constant intervals.

[0022] Another object of the present invention is to provide a continuous strand for a wig that achieves PTE by reducing bulkiness and forming a tapered shape by obliquely reducing the contraction freedom of the filaments in the strand length direction of the desired section of PTE.

[0023] Still another object of the present invention is to provide a wig using a continuous strand for a wig.

[0024] Technical Solution

[0025] In order to solve at least any one of the technical problems associated with the continuous strand for wigs, one aspect of the present invention provides a continuous strand for wigs.

[0026] It extends along the length direction, wherein

[0027] The continuous strand is in the shape of a simple strand having an outer shape formed by a rotational twist of a plurality of filaments and extending along the length direction; or in the shape of a composite strand having an outer shape formed by a cross-twist and / or braiding of a plurality of the simple strands and extending along the length direction, wherein:

[0028] The simple strands; and each simple strand constituting the composite strand comprises 40 to 4000 filaments of one or more kinds, comprising an amorphous organic polymer, a semi-crystalline organic polymer or a polymer alloy thereof, wherein,

[0029] The simple strands and the composite strands respectively have a circular shape; an elliptical shape; or at least one cross-sectional shape selected from a triangle, a square, and a pentagon. When the cross-section is circular or elliptical, its diameter or longest diameter is in the range of 0.2 cm to 3.0 cm. When the cross-section is polygonal, the length of at least one side thereof is in the range of 0.2 cm to 3.0 cm.

[0030] The simple strand and the composite strand respectively include a PN (Pencil Normal) segment extending along the length direction and having a first cross-sectional area of ​​constant size; two first PT (Pencil Tapering) segments extending from both ends of the PN segment and forming a tapered shape with a reduced cross-sectional area; two second PT segments extending from the ends of the two first PT segments with reduced cross-sectional areas and forming a tapered shape with the reduced cross-sectional area increasing again; and two PC (Pencil Connection) segments (connecting segments of PT-PN-PT repeating unit segments) connecting the first PT segment and the second PT segment adjacent to each other and having a second cross-sectional area of ​​constant size, wherein,

[0031] When a left-right symmetrical segment consisting of the PN segment and the two first PT segments connected to both ends of the PN segment is one cycle, the simple strand and the composite strand each repeatedly include two or more cycles, and adjacent cycles are connected to the PC segment, wherein:

[0032] The first cross-sectional area is larger than the second cross-sectional area, wherein

[0033] When the simple strands and the composite strands are separated by cutting all or part of the PN segment comprising 1 loop, respectively, and a part of the 1 loop having only one first PT segment, and while maintaining the texture and wave imparted to the filaments separated in this manner, when the length of the filaments is measured along the length direction, the difference Ld between the length Lmax of the longest filament and the length Lmin of the shortest filament and the length Lpt of the first PT segment included in the part of the separated 1 loop are different from each other.

[0034] In one embodiment, respective cross-sectional areas of the PN segments included in the central portion of each of the two or more cycles may be the same as or different from each other.

[0035] In one embodiment, when the simple strands and the composite strands are separated by cutting all or a portion of the PN segment comprising 1 loop and a portion of the 1 loop having only one first PT segment, respectively, and while maintaining the texture and waviness imparted to the filaments separated in this manner, the filaments can have the same or substantially the same length as one another when the length of the filaments is measured along the length direction.

[0036] In one embodiment, when the simple strands and the composite strands are separated by cutting the PN segments or the first PT segments or the second PT segments respectively, and while maintaining the texture and wave imparted to the filaments, the lengths of the filaments in each segment separated in this manner can be the same or substantially the same as each other when the straight length is measured along the length direction; or have two, three or four multi-layer length groups that are different from each other.

[0037] In one embodiment, as at least one of the rotational twist, the cross twist, and the braiding acting on a unit length of the simple strand and the composite strand increases, a gradient tension that increases in a direction perpendicular to the length direction is applied to the simple strand and the composite strand. Due to the resulting shrinkage control effect, the front ends of the first and second PT segments toward the simple strand and the composite strand may have a gradient cross-sectional area with a reduced cross-sectional area and become thinner.

[0038] In one embodiment, the plurality of first and second PT segments connected to the plurality of PN segments are realized by a gradient contraction GS along the length direction of the filament. At this time, the thickness (denier) of the filament can be expressed by the gradient contraction to reduce the gradient thickness (GT or gradient denier GD) along the length direction in the first PT segment and increase in the second PT segment, and the ratio of the pore volume between the filaments, that is, the porosity (porosity) reduces in the first PT segment along the length direction and increases in the second PT segment. At least one of the gradient porosity GP.

[0039] In one embodiment, the multiple first and second PT segments connected to the multiple PN segments are realized by a gradient contraction GS along the length direction of the filament. At this time, the gradient thickness (GT or gradient denier GD) of the filament is expressed only by the gradient contraction, so the thickness (denier) of the filament can decrease along the length direction in the first PT segment and increase in the second PT segment.

[0040] In one embodiment, the multiple first and second PT segments connected to the multiple PN segments are realized by gradient contraction along the length direction of the filament. At this time, only the ratio of the pore volume between the filaments can be expressed, that is, the porosity (porosity) decreases in the first PT segment along the length direction and the gradient porosity GP increases in the second PT segment.

[0041] In one embodiment, the sum of the rotational twist, cross twist, and braiding per unit length of the simple strands and the composite strands acting at the front ends of the first and second PT segments may be 1.2 to 5.5 times greater, preferably 1.5 to 4.0 times greater, than the sum of the rotational twist, cross twist, and braiding per unit length of the simple strands and the composite strands acting at the PN segment (in this case, the friction lock (RL) formed at the front ends of the first and second PT segments is

[0042] (except for rubbing lock, rotation twist lock, cross-twisted lock (CTL: cross-twisted lock) and braiding lock (BL: braiding lock) parts).

[0043] In one embodiment, the porosity of the PN segment; and the first and second PT segments is calculated as the ratio of actual density to bulk density RD / BD, wherein

[0044] The RD / BD ratio of the PN segment is 1.5 to 30, preferably 3 to 30, 2 to 20, 5 to 15, or 7 to 20,

[0045] as well as

[0046] The RD / BD ratio of the PN segment can be 1.2 to 10 times larger than the RD / BD ratio of the first and second PT segments (excluding the friction lock, rotational twist lock, cross twist lock and braid lock parts formed at the front ends of the first and second PT segments), preferably 1.5 to 4 times, 1.5 to 10 times, 1.8 to 8 times, or 1.8 to 5 times larger.

[0047] In one embodiment, the PN segment may represent a three-dimensional shape of a cylinder, an elliptical cylinder, a square prism, or a pentagonal prism.

[0048] And the first and second PT segments can represent a three-dimensional shape of a circular cone with the circular cross-section of the cylindrical PN segment as the base, an elliptical cone with the elliptical cross-section of the PN segment in the elliptical cylinder shape as the base, a square cone with the square cross-section of the PN segment in the square prism shape as the base, or a pentagonal cone with the pentagonal cross-section of the PN segment in the pentagonal prism shape as the base.

[0049] In one embodiment, in a side view of the first and second PT segments, an angle formed by a center line connecting the center point of a line segment represented by the bottom surface of the circular cone, the elliptical cone, the square cone, or the pentagonal cone of the first and second PT segments in the longitudinal direction and the center point of a line segment represented by the top surface of the circular cone, the elliptical cone, the square cone, or the pentagonal cone and any hypotenuse of the circular cone, the elliptical cone, the square cone, or the pentagonal cone is 0.3 to 45 degrees (e.g., 0.3 to 30 degrees, 0.5 to 25 degrees, 1 to 25 degrees, or 1.5 to 25 degrees), wherein

[0050] In a side view of the first and second PT segments, a center line formed by connecting the center point of the line segment represented by the bottom surface and the center point of the line segment represented by the top surface of the first and second PT segments may have a length of 1 to 50 cm.

[0051] In one embodiment, the reduction in cross-sectional area in the first PT segment is a result of a reduction in porosity between the filaments constituting the simple strands and the composite strands and / or a reduction in thickness of the filaments.

[0052] In the first and second PT sections, the simple strands and the composite strands are solid and not hollow.

[0053] shape, rather than a hollow shape.

[0054] In one embodiment, the shaping of repeating the plurality of cycles may be a line-symmetric shaping based on an imaginary line that cuts perpendicularly to the length direction at a midpoint of the PN segment.

[0055] In one embodiment, the simple strand and the composite strand may each have a length of more than 1 meter.

[0056] In one embodiment, the filaments each preferably have a thickness of 30 to 180 denier.

[0057] In one embodiment, the length of the PN segment may be in the range of 5 to 200 centimeters, the lengths of the first and second PT segments may be in the range of 1 to 50 centimeters, respectively, and the length of the PC segment may be in the range of 0.3 to 5 centimeters.

[0058] In one embodiment, the simple strands and the composite strands may be cut into shapes of constant length in a direction perpendicular to the length direction.

[0059] In one embodiment, the simple strands and the composite strands may consist of only filaments composed of one polymer component selected from amorphous organic polymers, semi-crystalline organic polymers, or polymer alloys thereof.

[0060] In order to solve the technical problems associated with the wig, another aspect of the present invention provides a wig including any one of the continuous strands for a wig.

[0061] Beneficial effects

[0062] In order to obtain the PT effect, the traditional carding machine pencil shape method carried out by manual work must carry out HWS work to trim the filaments because the filaments protrude from the strand ends like fine hairs. Due to the HWS work, the fine hairs that protrude are spread out toward the ends, so the effect of becoming neat can be obtained, but the texture given to the strands is also spread out at the same time, so the bulkiness (bulkiness, lightness) is destroyed, and it is easy to have a negative impact on economy and convenience. On the contrary, in the case of the continuous strand for wigs of the present invention, the ends of the sharp PT segments can be shown, and there is no or minimized protrusion of the filaments, and the PT effect of the new pattern is shown when the texture and bulkiness (bulkiness) are not destroyed. That is, if the continuous strand for wigs of the present invention is used, there is substantially no protrusion of the filaments, and by giving a weight feeling similar to the middle part in the PT segment at the end, stable drapability can be obtained, and the PT effect is formed symmetrically in the length direction (that is, MD direction) and the CMD direction perpendicular thereto, so that locking can be completed very stably. Therefore, if the strand for a wig according to the present invention is used, since the bottom end portion of the strand (the other side of the scalp) is sharp, substantially no fine hairs protrude, and a new pattern of PT effect can be obtained without destroying the texture and bulk (fluffiness).

[0063] Furthermore, conventionally, a method of attaching braids with a crochet needle along a support called cornrows is popular, so most special braids must be pre-looped at the top. If consumers want to wear these special braids, they must crochet them one by one. However, since the special braided product using the yarn according to the present invention is a continuous yarn that repeats in a symmetrical structure, the number of times crochet braids can be worn can be reduced by half, and by cutting it into the desired length and using it, the consumer's needs window can be widened.

[0064] If the continuous strand for wigs of the present invention is used, the sharp PT (MS-PT) effect, which is a cosmetic feature strongly demanded by the wig and hair care industries in recent years, can be effectively imparted, thereby maximizing the value of the strand product, and the PT effect can be obtained without going through the pencil-shaped process that requires considerable labor and cost in the labor-intensive wig manufacturing process.

[0065] If pencil shape effect is given by the traditional carding machine pencil shape that is carried out by manual work, and in the case of the simple strand formed by the rotational twist of filament; And the composite strand formed by the cross twist (two strands are interlaced and twisted) of two strands rotating in opposite directions or the composite strand of braiding three strands, because the length of the filaments included therein is different, they protrude outwards during the manufacturing process, and therefore look irregular and messy. In addition, because the PT section at the strand end is the section where the number of filaments decreases gradually, the drapability of the braided product obtained by braiding or twisting the filaments in the strand deteriorates, that is, the braided product does not seem to be wrapped around the body line of the wearer, but can cause instability as if it is scattered. In addition, because traditional simple strand and composite strand products lack the uniformity of symmetry in the direction perpendicular to the length direction, end locking (end-locking) is unstable, and long-term use is poor, and the end aesthetics is poor. In contrast, in the case of a braided product using the continuous strands of yarn for a wig according to the present invention, there is no or minimal protrusion of the filaments, and by imparting a weighted feel similar to that of the middle strands to the PT segments at the ends, a stable drape is achieved, and a PT effect is symmetrically achieved in the longitudinal direction and in a direction perpendicular thereto. Therefore, since the strands of the present invention are locked very stably and there is no loosening of the ends, they have excellent long-term usability, and their ends are neatly finished, thereby enhancing their aesthetic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 FIG. 1 is a schematic cross-sectional view of a continuous strand 10 for a wig having an MS-PT effect according to an embodiment of the present invention.

[0067] Figure 2 (A), 2(B) and 2(C) are shown Figure 1 The simple strands specifically shown in Figure 2 (A) 10), a composite strand formed by twisting in a direction in which two simple strands 10a and 10b are twisted to cross each other ( Figure 2 (B)), and a composite strand formed by braiding three simple strands 10a, 10b, and 10c ( Figure 2 (C) Schematic diagram of the PD-L1 pathway.

[0068] Figure 3 This is a photo of a composite yarn 10 formed by braiding three simple yarns 10a, 10b, and 10c.

[0069] Figure 4 For close-up Figure 3 , a photograph of the segments of the pencil taper effect (PTE) of the composite strand, ie, the first PT segment, the second PT segment and the portion of the PC segment connecting them.

[0070] Figure 5 For cut-away only Figure 1 Schematic side view of first and second PT segments of a linearly unfolded continuous strand 10 shown schematically in FIG.

[0071] Best Mode

[0072] The following describes in more detail various exemplary embodiments of continuous strands for wigs and wigs incorporating the same. However, the following description is for illustrative purposes only. Therefore, it will be apparent to those skilled in the art that various modifications and variations are possible. In the description of the present invention, detailed descriptions of related known functions or configurations are omitted to avoid obscuring the key points of the present invention. DETAILED DESCRIPTION

[0073] Figure 1 FIG is a schematic cross-sectional view of a continuous strand 10 for a wig having an MS-PT effect according to an embodiment of the present invention. Figure 1 , the continuous strand 10, which is stretched to form a straight line, is shaped to extend in the longitudinal direction 13. In the following description, the longitudinal direction 13, the MD direction, and the X direction are used synonymously, and the CMD direction 14 represents a direction perpendicular to the longitudinal direction 13 or the MD direction. This continuous strand 10 has an appearance formed by aggregating a plurality of filaments 12, typically single filaments or multifilaments, by rotational twisting, and is shaped as a simple strand 10 extending in the longitudinal direction 13.

[0074] The filaments are not particularly limited, but may include polyvinyl chloride (PVC), polyvinylidene chloride (e.g., trade name MODACRYL), polyacrylonitrile (PAN), acrylic resin, polycarbonate (PC), polymethyl methacrylate (PMMA), polystyrene (PS), acrylonitrile-butadiene-styrene (ABS) resin, polyester, styrene-acrylonitrile (SAN) resin, acrylonitrile-styrene-acrylate (ASA) resin, polyacrylate (PAR), polyester resin, polyphenylene sulfide (PPS) or alloys of two or more thereof. The polymer alloy may be, for example, an alloy of PC / ABS, PC / PET or PC / PMMA.

[0075] The continuous strand for a wig with an MS-PT effect according to another embodiment of the present invention is not limited to such a simple strand, and may be in the shape of a composite strand having an outer shape formed by cross-twist and / or braiding of a plurality of simple strands 10 through revolution and extending in the length direction 13.

[0076] Figure 2 (A), 2(B) and 2(C) are schematic diagrams showing Figure 1 The simple strands specifically shown in Figure 2 (A) 10) Figure 1 The direction in which the two simple strands 10a, 10b shown in FIG. cross each other (for example, Figure 2 The composite strand ( Figure 2 (B) 10), and the composite strand formed by braiding three simple strands 10a, 10b, 10c ( Figure 2 (C) Diagram of the structural differences of 10. Figure 2 (A), 2(B) and 2(C) conceptually show only a portion of these strands in the longitudinal direction to facilitate understanding of the structural differences between the simple strands and the composite strands described above. Figure 2 (B) and Figure 2 The composite strand shown in (C) also has the following characteristics as a whole: Figure 1 Taking the simple strand 10 shown as an example, the following describes the repeated structural features of the PN segment-first PT segment-second PT segment-PC segment with MS-PT effect. Figure 2 (A), 2(B) and 2(C) show the presence of empty spaces, but in reality, these spaces are usually invisible to the naked eye.

[0077] Figure 3 This is a photo of a composite yarn 10 formed by braiding three simple yarns 10a, 10b, and 10c. Figure 3 As a whole, it can be seen that the composite strand has Figure 1 The shown structural features are the repetition of PN segment-first PT segment-second PT segment-PC segment.

[0078] Figure 4 For close-up Figure 3 , a photograph of the segments of the pencil taper effect (PTE) of the composite strand, ie, the first PT segment, the second PT segment and the portion of the PC segment connecting them.

[0079] Refer again Figure 1 , simple strands 10 and composite strands ( Figure 2 (B) and Figure 2(C)) each includes a PN segment extending along the longitudinal direction and having a constant first cross-sectional area; two first PT segments extending from each end of the PN segment and tapering with decreasing cross-sectional area; two second PT segments extending from the ends of the two first PT segments, each tapering with increasing cross-sectional area; and two PC segments (connecting segments of PT-PN-PT repeating unit segments) connecting adjacent first and second PT segments and having a constant second cross-sectional area. Thus, the continuous strand for a wig of the present invention repeatedly includes the PN segment and the first and second PT segments in the longitudinal direction 13, i.e., the MD direction, thereby symmetrically repeating segments having a gradient thickness, i.e., a pencil-tapered PT effect.

[0080] When the left-right symmetrical segment consisting of the PN segment and the two first PT segments connected to both ends of the PN segment is 1 loop, the simple strand 10 repeatedly includes two or more loops, and adjacent 1 loops are connected to each other through the PC segment, and the first cross-sectional area of ​​the PN segment is larger than the second cross-sectional area of ​​the PC.

[0081] The simple strands and composite strands can alternately repeat one, two, or more types of 1-cycles. For example, two first or second PT segments are connected symmetrically at both ends with a PN segment of the first thickness as the center to form a 1-cycle, and a 1-cycle of a PN segment with the same first thickness is repeated; or another 1-cycle can be connected after the 1-cycle, wherein the two first or second PT segments are connected symmetrically at both ends with another PN segment of the second thickness as the center. As another example, when only the thickness of the PN segment is indicated, the sequence A thickness - B thickness - A thickness; B thickness - A thickness - B thickness; or A thickness - B thickness - C thickness; or A thickness - B thickness - B thickness - A thickness can be repeated. Adjacent 1-cycles can be connected to each other through a PC segment.

[0082] The simple strands and each simple strand constituting the composite strand may include 40 to 4000 filaments 12 of one or more types including an amorphous organic polymer, a semi-crystalline organic polymer, or a polymer alloy thereof.

[0083] The long filament 12 preferably has a thickness of 30 to 180 deniers respectively. The simple strand and composite strand can only be made up of the long filament formed by a polymer component selected from amorphous organic polymers, semi-crystalline organic polymers or its polymer alloy. If at least one of the chemical structure and the thermal shrinkage of the polymer constituting the long filament included in the strand is different, it is considered to be different types of long filaments. For example, even if long filament A and B are made up of the polymer (for example, PVC) of identical chemical structure, if the thermal shrinkage of the polymer constituting long filament A and B is different, the strand is considered to be made up of two kinds of long filaments.

[0084] The simple strand 10 and the composite strand ( Figure 2 (B) and Figure 2 (C)) each has a circular; elliptical; or at least one cross-sectional shape selected from a triangle, a square, and a pentagon, and when the cross-section is circular or elliptical, its diameter or the longest diameter is in the range of 0.2 cm to 3.0 cm, and when the cross-section is the polygonal, the length of at least one side thereof is in the range of 0.2 cm to 3.0 cm.

[0085] When the simple strand 10 and the composite strand ( Figure 2 (B) and Figure 2 (C)) respectively includes all or part of the PN segment of 1 cycle, and has only a part of 1 cycle of a first PT segment to separate, and while maintaining the texture and wave imparted to the filament 12 separated in this manner, when the length of the filament 12 is measured along the length direction 13, the difference Ld between the length Lmax of the longest filament and the length Lmin of the shortest filament and the length Lpt of the first PT segment included in the part of the separated 1 cycle have characteristics different from each other.

[0086] Respective cross-sectional areas of the PN segments included in the central portion of each 1 cycle in the two or more cycles may be the same as or different from each other.

[0087] When the simple strands and the composite strands are separated by cutting all or part of the PN segment comprising 1 cycle and part of 1 cycle having only one first PT segment, respectively, and while maintaining the texture and waviness imparted to the filaments 12 separated in this manner, the filaments 12 can have the same or substantially the same length as one another when the length of the filaments 12 is measured along the length direction 13.

[0088] When the simple strand and the composite strand are separated by cutting the PN segment or the first PT segment or the second PT segment, respectively,

[0089] And while maintaining the texture and wave imparted to the filaments 12, the lengths of the filaments 12 within each segment separated in this manner can be the same or substantially the same as one another when the straight length is measured along the length direction; or there can be two, three or four multi-stage length groups that are different from one another.

[0090] The shape feature of the above structure of the continuous strand according to the present invention is fundamentally different from the tapered structure of the cross-sectional area (bundle thickness) in the length direction of a bundle of filaments introduced into a group in a pencil-shaped manner by a conventional carding machine.

[0091] As at least one of rotational twisting, cross twisting, and braiding acting on a unit length of the simple strands and composite strands increases, a gradient tension is applied to the simple strands and composite strands in a direction perpendicular to the length direction 13. Due to the resulting shrinkage control effect, the simple strands and composite strands can have a gradient cross-sectional area with a decreasing cross-sectional area and become thinner toward the front ends of the first and second PT segments. That is, as rotational twisting (autorotational twisting), cross twisting (rotational twisting: cross twisting), and / or braiding increases, a gradient tension is applied to the simple strands and composite strands in a direction 14 perpendicular to the length direction 13. Due to the resulting shrinkage control effect, the thickness of the simple strands and composite strands can decrease toward the front ends of the first and second PT segments, and the simple strands and composite strands can have a gradient cross-sectional area and become thinner. In another embodiment, the sum of the rotational twist (autorotation twist), cross twist (rotational twist) and braiding per unit length of the simple strands and composite strands acting on the front end of the first and second PT segments is controlled to be 1.2 to 5.5 times larger, preferably 1.5 to 4.0 times larger (in this case, the friction lock RL, rotational twist (Locking by autorotation twist), cross twist lock CTL and / or braid lock BL parts formed at the front end of the first and second PT segments are excluded) which can be aesthetically beneficial.

[0092] The multiple first and second PT segments connected to the multiple PN segments are realized by a gradient contraction GS along the length direction 13 of the filament 12. At this time, the thickness (denier) of the filament 12 can be expressed by the gradient contraction to reduce the gradient thickness (GT or gradient denier (GD)) along the length direction 13 in the first PT segment and increase in the second PT segment, and the ratio of the pore system between the filaments 12, that is, the porosity (porosity) reduces in the first PT segment along the length direction 13 and increases in the second PT segment. At least one of the gradient porosity GP.

[0093] The multiple first and second PT segments connected to the multiple PN segments are realized by gradient contraction GS along the length direction 13 of the filament 12. At this time, the gradient thickness (GT or gradient denier GD) of the filament 12 is expressed only by the gradient contraction, so the thickness (denier) of the filament 12 can be reduced along the length direction 13 in the first PT segment and increased in the second PT segment.

[0094] The plurality of first and second PT segments connected to the plurality of PN segments are realized by gradient contraction along the length direction 13 of the filament 12. In this case, only the ratio of the pore system existing between the filaments 12, i.e., the porosity, can be expressed.

[0095] The gradient porosity GP decreases along the length direction 13 in the first PT section and increases in the second PT section.

[0096] From an aesthetic point of view, the sum of the rotational twisting, cross-twisting, and braiding per unit length of the simple strands and composite strands acting on the front ends 17 and 18 of the first and second PT segments can be 1.2 to 5.5 times greater, preferably 1.5 to 4.0 times greater, than the sum of the rotational twisting, cross-twisting, and braiding per unit length of the simple strands and composite strands acting on the PN segment (in this case, the friction lock (RL: rubbing lock), rotational twist lock, cross-twisted lock (CTL: cross-twisted lock), and braid lock (BL: braid lock) formed at the front ends of the first and second PT segments are greater than the sum of the rotational twisting, cross-twisting, and braiding per unit length of the simple strands and composite strands acting on the PN segment).

[0097] braiding lock).

[0098] Aesthetically, the porosity of the PN segment; and the first and second PT segments is calculated as the ratio of actual density to bulk density (RD / BD), and at this time, the RD / BD ratio of the PN segment is 1.5 to 30, preferably 3 to 30, 2 to 20, 5 to 15, or 7 to 20.

[0099] Aesthetically, the RD / BD ratio of the PN segment may be 1.2 to 10 times greater than the RD / BD ratio of the first and second PT segments (excluding the friction lock, rotational twist lock, cross twist lock, and braid lock portions formed at the front ends 17, 18 of the first and second PT segments), preferably 1.5 to 4 times, 1.5 to 10 times, 1.8 to 8 times, or 1.8 to 5 times greater.

[0100] Real density has the same meaning as true density or absolute density.

[0101] Bulk density has the same meaning as apparent density or volumetric density and is well known in the field of science and technology. The ratio of actual density to bulk density, RD / BD, can be evaluated as follows.

[0102] (1) Measurement of bulk density

[0103] A sample of the section is appropriately cut from the strand and its length, width, and thickness are measured to determine its weight and apparent volume. When measuring the length, width, and thickness, measurements are made based on the outline of the sample, while slight twists and turns in the sample are ignored. Based on the measured weight and apparent volume, the bulk density of the sample is calculated based on the following formula.

[0104] Bulk density = weight / apparent volume.

[0105] (2) Measurement of actual density

[0106] With respect to the sample, the actual density of the sample was measured by a pycnometer method using helium gas using an actual density measuring instrument (AutoPycnometer 1320 manufactured by Micromeritics Corporation).

[0107] (3) Measurement of the ratio of actual density to bulk density (RD / BD)

[0108] The ratio is obtained by dividing the actual density value obtained above by the bulk density value.

[0109] The PN segment can represent a three-dimensional shape of a cylinder, an elliptical cylinder, a square prism or a pentagonal prism, and the first and second PT segments can represent a three-dimensional shape of a circular cone with the circular cross-section of the cylindrical PN segment as the base, an elliptical cone with the elliptical cross-section of the elliptical cylinder PN segment as the base, a square cone with the square cross-section of the square prism PN segment as the base, or a pentagonal cone with the pentagonal cross-section of the pentagonal prism PN segment as the base.

[0110] Figure 5 For cut-away only Figure 1 A schematic side view of the first and second PT segments of the linearly unfolded continuous strand 10 is schematically shown in FIG. Figure 5 , the center point A of the line segment 21 represented by the bottom surface of the circular cone, the elliptical cone, the square cone or the pentagonal cone of the first and second PT segments and the top surface ( Figure 1The angle α formed by the center line 23 formed by connecting the center point B of the line segment 22 represented by the position 17 or 18 of the first and second PT segments in the length direction 13 and any hypotenuse 25 of the circular cone, the elliptical cone, the square cone or the pentagonal cone is 0.3 to 45 degrees, for example, 0.3 to 30 degrees, 0.5 to 25 degrees, 1 to 25 degrees or 1.5 to 25 degrees, and in the side view of the first and second PT segments, the length of the center line formed by connecting the center point A of the line segment 21 represented by the bottom surface of the first and second PT segments and the center point B of the line segment 22 represented by the top surface can be aesthetically adjusted to 1 to 50 centimeters.

[0111] Figure 5 The side view shown can be obtained from a photograph obtained by observing the strand centered on the first and second PT segments using a scanning electron microscope SEM or an optical microscope.

[0112] The angle serves as a measure of the gradient of the PT segment, which can be adjusted by adjusting the length shrinkage LS and / or texture shrinkage TS of the filament produced by adjusting at least one extent selected from the rotational twist RT, cross twist CT and weaving applied to the filament during the manufacturing process.

[0113] The reduction in cross-sectional area in the first PT section is the result of a reduction in porosity between the filaments constituting the simple and composite strands and / or a reduction in the thickness of the filaments. Furthermore, in the first and second PT sections, the simple and composite strands can have a solid shape, rather than a hollow shape. Specifically, the continuous strand according to the present invention differs from a conventionally hollow core shape by winding a filament bundle around a mold having a gradient thickness, such as an arrow-shaped winding tube, and then heat-setting and setting it.

[0114] Repeating the plurality of cycles may be based on the midpoint of the PN segment ( Figure 1 19 position) perpendicular to the imaginary line cut in the length direction 13 ( Figure 1 19) Linear symmetrical shape.

[0115] The simple strands and the composite strands may each have a length of more than 1 meter. The length of the PN segment may be in the range of 5 to 200 cm, the lengths of the first and second PT segments may each be in the range of 1 to 50 cm, and the length of the PC segment may be in the range of 0.3 to 5 cm.

[0116] The simple strand and the composite strand can be cut into a shape of constant length in a direction perpendicular to the length direction. Specifically, the PN segment and the two first or second PT segments connected to the two ends thereof can be cut into a shape of constant length in a direction perpendicular to the length direction. Figure 1The strand 10 can be commercialized by cutting it in a shape formed by a continuous dotted line 22 in the longitudinal direction 13. In this case, the wearer can wear it in a manner that the filaments of the portion are connected to the real hair of the scalp portion after the center line 19 of the PN segment is folded in half, so that the bottom end portion (17 or 22) of the first or second PT segment hangs down toward the ground. Alternatively, it can be commercialized in a shape consisting of a PN segment and a first or second PT segment after the center line 19 of the PN segment is folded in half. In this case, the wearer can wear it in a manner that the filaments of the portion of the center line 19 of the cut PN segment are connected to the real hair of the scalp portion, so that the bottom end portion (17 or 22) of the first or second PT segment hangs down toward the ground.

[0117] When the wig products obtained by cutting (cutting) the simple and composite strands of the present invention into a constant length in the CMD direction perpendicular to the length direction are put on the market, the front ends of the first and second PT segments can be in a friction-locked RL, mutually twisted-locked CTL or braid-locked BL state; or can be subjected to heat drawing (HD) or curling processing, or the filaments at the front ends can be unlocked and in a loose state without being constrained by each other.

[0118] According to another aspect of the present invention, a wig can be manufactured using the above-mentioned continuous strands for wigs. For example, the continuous strands of the present invention can be used to manufacture wefts for making wigs. The wefts serve as connecting bands extending in one direction; and a plurality of strands, one end of which is connected to the connecting band, wherein one end of the strands includes a plurality of strands sequentially connected to the side of the connecting band along the extending direction of the connecting band. In this case, the strands can be the above-mentioned continuous strands for wigs of the present invention. That is, the wig according to another aspect of the present invention may include the strands according to the one aspect of the present invention or the wefts of the above-mentioned construction.

[0119] The continuous strand for a wig according to the present invention having the above-mentioned structural features can be programmed by using a PLC that takes into account the tension, shrinkage rate and Tg of the filament to thicken the PN segment to form the first and second PT segments, and to make the first and second PT segments tapered upward or downward to be relatively thin.

[0120] The invention relates to a method for producing a strand having an MS-PT effect by using an automatic control method of a Programmable Logic Controller (PLC), rather than by manual work in the shape of a carding machine. Specifically, the following method can be used as a method for producing a strand having an MS-PT effect.

[0121] First, a PLC-controlled system can be used to automatically control the degree of rotational twisting (RT), cross-twist (CT), and / or braiding, corresponding to the tension in the CMD direction perpendicular to the length of the strand, and the temperature applied to the strand, to set a gradient condition of increase and decrease. PT is then repeatedly induced in a certain portion of the strand (at constant intervals), thereby achieving an MS-PT effect. In this case, while the physical tension of rotational twisting, cross-twist, and / or braiding is repeatedly applied to the strand in a normal or tapered manner, a heat shrinkage treatment is simultaneously performed, thereby producing a strand having a constant thickness PN segment and a first and second PT segments of the strand having a tapered thickness. For example, by adjusting the physical energy applied to the strand, namely, heat (heating temperature, application time), tension, and compression, the shrinkage rate of the filaments constituting the strand in the first PT segment is adjusted to form a tapered shape, i.e., by adjusting the shrinkage rate to gradually decrease (forming a downward taper) and then gradually increase the shrinkage rate in the second PT segment (forming an upward taper), thereby forming gradient thickness segments of the strand symmetrically and continuously at constant intervals along the length of the strand. At this time, the heat that has a great influence on the shrinkage rate of the filaments inducing the PT segment can be controlled by the heat source temperature and the heat source application time, and the force that forms a cone of shrinkage can be controlled by the tension in the MD direction of the strand and the vertical pressure (compression force) in the CMD direction, etc. The degree of which can be controlled by an automatic control device can adjust the desired PT characteristics.

[0122] If a lot of rotational twist or cross twist is applied to the strands being made, the strands should be thicker, otherwise,

[0123] As the tension applied in the CMD direction of the strand increases, the freedom of contraction is restricted, resulting in a phenomenon of strand thinning (hereinafter referred to as the "reverse phenomenon"). By using this reverse phenomenon, the filaments in the strand undergo gradient thickness contraction and a larger gradient texture contraction (GTS) to form a PT segment.

[0124] The specific manufacturing process can be roughly divided into two types. That is, the manufacturing process can be divided into: i) the process of applying appropriate physical forces of rotational twist, cross twist and / or weaving to the filaments stretched and spun in the previous process; ii)

[0125] The process of heating the strands of the filaments that are given physical force (heat shrinkage process), that is, the process of applying rotational twisting, cross twisting and / or braiding to the strands composed of a collection of a constant amount of filaments, or a plurality of strands and inducing heat shrinkage, can be carried out as a continuous process, or can be divided into two steps. At this time, when the heat shrinkage process is carried out while changing the temperature of the heat shrinkage chamber, not only many heat chambers are required, but it is also difficult to subdivide and control the length of the strands passing through the segment. Therefore, it is advantageous to adjust the degree of heat shrinkage by adjusting the residence time in the heat chamber maintained at a constant temperature. However, this method also makes it difficult to subdivide and control the strand segments that stay as much as possible, and unless the heat shrinkage chamber segment is very subdivided, it is difficult to form the first and second PT segments. Therefore, under the condition that the heat shrinkage temperature and residence time of the heat shrinkage chamber are constant, the first and second PT segments can basically be formed conveniently by controlling the degree of freedom of shrinkage in the entire process. Specifically, a force in the CMD direction is applied by controlling the unit length of each strand, i.e., the rotational twist per meter (in the case of a pure strand), the cross twist (CT), and / or the number of braids, to produce a continuous strand for a wig having the aforementioned structural characteristics. In addition to controlling the gradient shrinkage rate in the first and second PT sections, a gradient property can also be imparted to the thickness of the filaments constituting the strand after shrinkage, or both properties can be simultaneously exhibited.

[0126] In the manufacturing process of the continuous yarn according to the present invention, as described above, both texture shrinkage (TS) and thickness shrinkage of the filaments occur, but the PT effect is dependent on the texture shrinkage. However, in order to achieve a sharper end at the front end of the PT section of the finished wig product, products that reduce rotational twisting, cross-twisting, and / or braiding by heat stretching in both directions along the length of the strand are also included in the yarn according to the present invention. Furthermore, products that have locked ends through twisting, braiding, friction, etc., in addition to heat stretching, are also included in the yarn according to the present invention.

[0127] While specific embodiments and examples have been discussed, one of ordinary skill in the art will appreciate that the scope of the claims extends beyond the specifically discussed embodiments to alternative embodiments and / or uses and obvious variations and equivalents thereof.

[0128] Industrial Applicability

[0129] The present invention can be used to manufacture wigs.

Claims

1. A continuous strand for a wig, extending in a length direction, wherein: The continuous strand is in the shape of a simple strand, which has an outer shape formed by the rotational twisting of multiple filaments and extends along the length direction; or in the shape of a composite strand, which has an outer shape formed by the rotational cross-twisting and / or braiding of multiple simple strands and extends along the length direction, wherein, The simple strands; and each simple strand constituting the composite strand comprises 40 to 4000 filaments of one or more kinds, comprising an amorphous organic polymer, a semi-crystalline organic polymer or a polymer alloy thereof, wherein, The simple strands and the composite strands respectively have a circular shape; an elliptical shape; or at least one cross-sectional shape selected from a triangle, a square, and a pentagon. When the cross-section is circular or elliptical, its diameter or longest diameter is in the range of 0.2 cm to 3.0 cm. When the cross-section is polygonal, the length of at least one side thereof is in the range of 0.2 cm to 3.0 cm. The simple strand and the composite strand each include a PN segment extending along the length direction and having a first cross-sectional area of ​​a constant size; two first PT segments extending from both ends of the PN segment and forming a tapered shape with a decreasing cross-sectional area; two second PT segments extending from ends of the two first PT segments with a decreasing cross-sectional area and forming a tapered shape with the decreasing cross-sectional area increasing again; and two PC segments connecting the first PT segment and the second PT segment adjacent to each other and having a second cross-sectional area of ​​a constant size, wherein: When a left-right symmetrical segment consisting of the PN segment and the two first PT segments connected to both ends of the PN segment is one cycle, the simple strand and the composite strand each repeatedly include two or more cycles, and adjacent cycles are connected to the PC segment, wherein: The first cross-sectional area is larger than the second cross-sectional area, wherein When the simple strands and the composite strands are separated by cutting all or part of the PN segment comprising 1 loop, respectively, and a part of the 1 loop having only one first PT segment, and while maintaining the texture and wave imparted to the filaments separated in this manner, when the length of the filaments is measured along the length direction, the difference Ld between the length Lmax of the longest filament and the length Lmin of the shortest filament and the length Lpt of the first PT segment included in the part of the separated 1 loop are different from each other.

2. The continuous strand for a wig according to claim 1, characterized in that Respective cross-sectional areas of the PN segments included in the central portion of each 1 cycle in the two or more cycles may be the same as or different from each other.

3. The continuous strand for a wig according to claim 1, characterized in that When the simple strands and the composite strands are separated by cutting all or part of the PN segment comprising 1 loop and a part of the 1 loop having only one first PT segment, respectively, and while maintaining the texture and wave imparted to the filaments separated in this manner, the filaments have the same length as one another when the length of the filaments is measured along the length direction.

4. The continuous strand for a wig according to claim 1, wherein When separated by cutting the PN segment or the first PT segment or the second PT segment of the simple strand and the composite strand respectively, and while maintaining the texture and wave imparted to the filament, when the straight length is measured along the length direction, the length of the filaments in each segment separated in this manner is the same as each other; or has two, three or four multi-layer length groups that are different from each other.

5. The continuous strand for a wig according to claim 1, wherein As at least one of the rotational twist, the cross twist and the braiding acting on the unit length of the simple strands and the composite strands increases, a gradient tension that increases in a direction perpendicular to the length direction is applied to the simple strands and the composite strands, and due to the resulting shrinkage control effect, the front ends of the first and second PT segments toward the simple strands and the composite strands have a gradient cross-sectional area with a reduced cross-sectional area and become thinner.

6. The continuous strand for a wig according to claim 1, wherein The multiple first and second PT segments connected to the multiple PN segments are realized by a gradient contraction GS along the length direction of the filament. At this time, the thickness of the filament is expressed by the gradient contraction, which is reduced in the first PT segment along the length direction and increased in the second PT segment, the gradient thickness GT, and the ratio of the pore volume between the filaments, that is, the porosity is reduced in the first PT segment along the length direction and increased in the second PT segment, at least one of the gradient porosity GP.

7. The continuous strand for a wig according to claim 1, wherein The multiple first and second PT segments connected to the multiple PN segments are realized by a gradient contraction GS along the length direction of the filament. At this time, the gradient thickness GT of the filament is expressed only by the gradient contraction, so the thickness of the filament decreases along the length direction in the first PT segment and increases in the second PT segment.

8. The continuous strand for a wig according to claim 1, wherein The multiple first and second PT segments connected to the multiple PN segments are realized by gradient contraction along the length direction of the filament. At this time, only the ratio of the pore volume between the filaments is expressed, that is, the porosity decreases in the first PT segment along the length direction and the gradient porosity GP increases in the second PT segment.

9. The continuous strand for wigs according to any one of claims 1 to 8, characterized in that The sum of the rotational twist, cross twist, and braiding per unit length of the simple strands and the composite strands acting at the front ends of the first and second PT segments is 1.2 to 5.5 times greater than the sum of the rotational twist, cross twist, and braiding per unit length of the simple strands and the composite strands acting at the PN segment. In this comparison, friction locking, rotational twist locking, cross twist locking, and braid locking portions formed at the front ends of the first and second PT segments are not included.

10. The continuous strand for a wig according to any one of claims 1 to 8, characterized in that The PN segment; and the porosity of the first and second PT segments is calculated as the ratio of actual density to bulk density RD / BD, wherein, The RD / BD ratio of the PN segment is 1.5 to 30, and The RD / BD ratio of the PN segment is 1.2 to 10 times greater than the RD / BD ratio of the first and second PT segments, and in this comparison, the friction lock, rotation twist lock, cross twist lock and braid lock parts formed at the front ends of the first and second PT segments are not included.

11. The continuous strand for a wig according to any one of claims 1 to 8, characterized in that The PN segment represents a three-dimensional shape of a cylinder, an elliptical column, a square prism or a pentagonal prism, and the first and second PT segments represent a three-dimensional shape of a circular cone with the circular cross-section of the cylindrical PN segment as the base, an elliptical cone with the elliptical cross-section of the PN segment with the elliptical column shape as the base, a square cone with the square cross-section of the PN segment with the square prism shape as the base, or a pentagonal cone with the pentagonal cross-section of the PN segment with the pentagonal prism shape as the base.

12. The continuous strand for a wig according to claim 11, wherein In the side views of the first and second PT segments, the angle formed by the center line connecting the center point of the line segment represented by the bottom surface of the circular cone, the elliptical cone, the square cone, or the pentagonal cone of the first and second PT segments in the length direction and the center point of the line segment represented by the top surface of the circular cone, the elliptical cone, the square cone, or the pentagonal cone and any hypotenuse of the circular cone, the elliptical cone, the square cone, or the pentagonal cone is 0.3 to 45 degrees, wherein: In side views of the first and second PT segments, a center line formed by connecting the center point of a line segment represented by the bottom surface and the center point of a line segment represented by the top surface of the first and second PT segments has a length of 1 to 50 cm.

13. The continuous strand for a wig according to any one of claims 1 to 8, characterized in that The reduction in cross-sectional area in the first PT segment is a result of a reduction in porosity between the filaments constituting the simple and composite strands and / or a reduction in thickness of the filaments, wherein In the first and second PT sections, the simple strands and the composite strands are solid shapes that are not hollow, rather than hollow shapes that are hollow.

14. The continuous strand for a wig according to any one of claims 1 to 8, characterized in that The shaping of repeating the plurality of cycles is a line-symmetric shaping based on an imaginary line that cuts perpendicularly to the length direction at a midpoint of the PN segment.

15. The continuous strand for a wig according to any one of claims 1 to 8, characterized in that The simple strands and the composite strands each have a length of more than 1 meter.

16. The continuous strand for a wig according to any one of claims 1 to 8, characterized in that The filaments each have a thickness of 30 to 180 denier.

17. The continuous strand for a wig according to any one of claims 1 to 8, characterized in that The length of the PN segment is in the range of 5 to 200 cm, the lengths of the first and second PT segments are respectively in the range of 1 to 50 cm, and the length of the PC segment is in the range of 0.3 to 5 cm.

18. The continuous strand for a wig according to any one of claims 1 to 8, characterized in that The simple strands and the composite strands are cut in a direction perpendicular to the length direction into shapes of constant length.

19. The continuous strand for a wig according to any one of claims 1 to 8, characterized in that The simple strands and the composite strands consist of only filaments composed of one polymer component selected from amorphous organic polymers, semi-crystalline organic polymers or polymer alloys thereof.

20. A wig comprising the continuous strand for a wig according to any one of claims 1 to 8.

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