KR102631921B1 - A bundle of filaments for wigs, a method for manufacturing the same - Google Patents

Abstract

One aspect of the present invention is a second filament bundle produced by applying instantaneous tension in both directions of the length of a first filament bundle of 20 to 150 denier to break it at first and second positions spaced apart by a predetermined length, 2 The filament bundle includes a middle portion and a first end and a second end portion where the broken portions at the first and second positions are connected to both sides of the middle portion, and the filaments of the middle portion have the same length, and The filaments of the first end and the second end have a random length distribution and, when arranged in length order, provide a bundle of filaments for a wig having a gradient length distribution. The second filament bundle does not include one or more length groups, and the length group includes more than 20% of the total filaments and refers to a group of filaments having substantially the same length. When the second filament bundle is three-dimensionally gathered, the first and second ends have a sharp conical shape (PT: Pencil Tapering).

Description

A bundle of filaments for wigs, a method for manufacturing the same}

The present invention relates to a filament bundle for a wig and a method of manufacturing the same.

Traditionally, wig products for black people have been broadly divided into four product groups: wig, weaving, draw string, and normal braid, depending on how they are worn. A wig is a product that is worn over the head, and weaving creates a hair path called a corn row on the wearer's true hair and sews or glues bundles of wig filaments along the path. It is an attach type product. A draw string is a product that connects a half-wig-sized product to the black wearer's hair using a pulling string. Normal braid is a product that divides the wearer's true hair into parts to create a hair group and connects the normal braid product to this hair group by braiding or twisting. A product line called Special Braid has recently been added, which is a product that allows the braided filament bundles for wigs to be connected to the wearer's hair group or hair path using a crochet needle.

The normal braid group is largely divided into regular braid (non-stretched braid) and pre-stretched braid, depending on the presence or absence of the PT (Pencil Tapering) effect, which has a sharp cone shape at the end of the filament bundle. It is a distinction. Straightened products are sometimes called non-stretched products, and non-stretched products are sometimes called pre-stretched products, meaning that their edges are not aligned.

Figure 1 is a diagram showing a regular braid (a) and an irregular braid (b). Referring to Figure 1, in the regular braid (a), the ends of the filament bundles form a straight line, while in the irregular braid (b), the ends of the filament bundles have a V-shape and a gradient length. In the case of Bijeong braids (b), you can achieve a naturally sophisticated and neat hairstyle by increasing the volume at the top and slanting the length of the ends, and Bijeong products are currently trending. Coarse braids can be formed through braiding operations. Pre-stretch work is also called pre-stretch work. Brushing work can be performed, for example, by combing filaments of the same length using a hackle (a type of large comb) and interlacing the filaments in both directions of the filament length to create an unaligned state. And by folding the central part (based on the length direction) of these filaments in half, a gradient length effect can be created from the central reference line connected to the scalp when worn. Currently, there is a growing trend to make the end portions of the filaments appear sharper. For example, recently, two-step filaments, that is, filaments containing length groups of two different lengths, are overlapped in the center part based on the length direction and combed using a hackle. Through razor-sharp work, we were able to create a sharper slope length effect. Furthermore, multi-step hair, for example, 3-step hair (long hair, medium hair, short hair) is also appearing.

On the other hand, if precise work is not done for asymmetrical techniques using Harkle, the asymmetrical symmetry may not be uniform, which may impede the beauty characteristics. Skill level has a significant impact on product quality, and it is the most labor-intensive process in mass manufacturing. It also has a big impact on unit price. Special braids, such as bundles of textured filaments grouped by rotating twists, that cannot be twisted, must find methods other than Harkel braiding to achieve the braiding effect.

Patent Registration Publication No. 10-2001428

One object of the present invention is to provide a filament bundle for a wig having warp lengths at the ends.

Another object of the present invention is to provide a method of manufacturing a filament bundle for a wig having a warp length at the end.

One aspect of the present invention to solve the above technical problem is

A second filament bundle created by applying instantaneous tension in both directions of the length of the first filament bundle of 20 to 150 denier to break it at first and second positions spaced apart by a predetermined length,

The second filament bundle includes a middle portion and first and second ends wherein portions broken at the first position and the second position are connected to both sides of the middle portion,

The filaments of the middle portion have the same length, the filaments of the first end and the second end have a random length distribution, and when arranged in length order, provide a bundle of filaments for a wig having a gradient length distribution. do.

wherein the second filament bundle does not include more than one length group,

The length group refers to a group of filaments containing more than 20% of the total filaments and having substantially the same length,

The filaments in the second filament bundle have a random length distribution and a gradient length distribution when arranged in length order,

When the second filament bundle is three-dimensionally gathered, the first and second ends have a sharp conical shape (PT: Pencil Tapering).

In one embodiment, the wig filament bundle comprises all or a portion of the middle portion of the second filament bundle and the first end, or comprises all or a portion of the middle portion of the second filament bundle and the second end. It may be a third filament bundle made by cutting and separating the second filament bundle.

The filaments in the third filament bundle have a random length distribution, have a gradient length distribution when arranged in length order, and when three-dimensionally gathered around the longest filament, the opposite end of the cut and separated end It may have a sharp cone shape (PT: Pencil Tapering).

In one embodiment, the rapid tensile elongation at break (BESB) and the rapid tensile elongation at yield (YESB) of the second filament bundle or the third filament bundle are both 50% or less, and the rapid tensile elongation at yield (YESB) versus the rapid tensile The ratio of elongation at break (BESB) (YESB/BESB) may be 1.0 or less.

In one embodiment, the rapid tensile elongation at break (BESB) and the rapid tensile elongation at yield (YESB) of the second filament bundle or the third filament bundle are both 50% or less, and the tensile strength is 1.5 to 0.1 g/d. You can.

In one embodiment, the second filament bundle or the third filament bundle includes a plurality of filament groups grouped, and each filament group may be rotary twisted (TM) or cross twisted (CTM). .

In one embodiment, the second filament bundle or the third filament bundle may not be rotationally twisted (TM) or cross-twisted (CTM).

In one embodiment, one of the filament groups has a diameter before fracture (D ₀ ) and a diameter after fracture (D _b ),

The diameter before breaking (D ₀ ) is the diameter of the thickest part when looking at the end of the filament group from the front before breaking the filament bundle (if the cross-section of the filament group is oval, the longest diameter and shortest diameter of the oval) arithmetic mean diameter),

The diameter after breaking (D _b ) is the diameter of the thickest part when the end of the filament group is viewed from the front after breaking the filament bundle (if the cross-section of the filament group is oval, the longest diameter and shortest diameter of the oval) arithmetic mean diameter),

At this time, the fracture distortion (D _g ) for the filament group is expressed as the following equation (1),

D _g = {(D _b -D ₀ )/D ₀ }×100 (%) (1)

The fracture distortion may be 80% or less.

In one embodiment, when 240 filaments of the filament bundle are arranged side by side in as close contact as possible and fixed to an adhesive tape to form a filament array,

Distortion that depends on Tangle obtained from Equation (2) below for the width (W ₀ ) of the filament array before rupture of the filament array and the width (W _b ) of the filament array after rupture of the filament array. (D _w ) may be less than 50%:

D _w = {(W _b -W ₀ )/W ₀ }×100 (%) (2).

Another aspect of the present invention to solve the above technical problem is a method of manufacturing a filament bundle for a wig,

(a) providing a first filament bundle comprising a plurality of filaments;

(b) breaking the first filament bundle at a first position by applying an instantaneous tensile force to the first filament bundle by pulling it from both sides at a speed of at least 100 mm/sec or more; and

(c) By applying an instantaneous tensile force to the first filament bundle broken at the first position by pulling it from both sides at a speed of at least 100 mm/sec, the first filament bundle is separated from the first position by a predetermined distance from the first position. breaking at two positions to form a second filament bundle; Includes.

The second filament bundle includes a first end and a second end each including a broken portion at the first location and the second location, and an intermediate portion having the same length between the first end and the second end. .

The second filament bundle does not include one or more length groups, and the length group includes more than 20% of the total filaments and refers to a group of filaments having substantially the same length.

The filaments in the second filament bundle have a random length distribution and a gradient length distribution when arranged in length order,

When the second filament bundle is three-dimensionally gathered, the first and second ends have a sharp conical shape (PT: Pencil Tapering).

In one embodiment, the wig filament bundle comprises all or a portion of the middle portion of the second filament bundle and the first end, or comprises all or a portion of the middle portion of the second filament bundle and the second end. It may be a third filament bundle made by cutting and separating the second filament bundle.

The filaments in the third filament bundle have a random length distribution, have a gradient length distribution when arranged in length order, and when three-dimensionally gathered around the longest filament, the opposite end of the cut and separated end It may have a sharp cone shape (PT: Pencil Tapering).

In one embodiment, the first filament bundle includes a plurality of filament groups, and each group may be rotary twisted (TM) or cross twisted (CTM).

The filament bundle for a wig according to the present invention is composed of filaments of various lengths and has a continuous length inclined section at the end, thereby providing naturalness and high aesthetics.

The method for manufacturing a filament bundle for a wig according to the present invention allows the filament bundle having a continuous length inclined section at the end to be easily manufactured by breaking the filaments in the filament bundle to have random lengths, thereby increasing productivity.

Figure 1 is a diagram showing a conventional straight braid (a) and an irregular braid (b).
Figure 2 is a flow chart for explaining a method of manufacturing a filament bundle for a wig according to an embodiment of the present invention.
Figure 3 is a photograph of an example of a fracture irregularity that can be used in this embodiment.
Figures 4a to 4c are conceptual diagrams showing the second filament bundle formed when the first filament bundle is broken.
Figure 5 is a view showing a third filament bundle formed by cutting the middle portion of the second filament bundle.
Figure 6 is a table showing the length distribution of filaments in one cycle of the conventional 1-stage, 2-stage, and 3-stage amorphous filament bundles and the filament bundle manufactured according to the present invention.
Figure 7 is a conceptual diagram for explaining a method of measuring the fracture distortion of one filament group among the filament bundles.
Figure 8 is a conceptual diagram to explain a method of measuring the fracture distortion of a simple filament bundle.
Figure 9 is a photograph of a grouped filament bundle sample with both sides broken according to one embodiment, neatly folded in half.
Figures 10A to 10C are photographs of some filament groups among the grouped filament bundles broken in Examples 1 to 3.
Figures 11A to 11E are photographs of some filament groups among the grouped filament bundles broken in Comparative Examples 1 to 5.
Figure 12 is a photograph of a simple filament bundle sample broken on both sides neatly folded in half according to one embodiment.

Hereinafter, a filament bundle for a wig according to embodiments of the present invention, a method of manufacturing the filament bundle for a wig, and a wig using the same will be described in detail.

(Method of manufacturing filament bundles for wigs)

Figure 2 is a flow chart for explaining a method of manufacturing a filament bundle for a wig according to an embodiment of the present invention.

Referring to FIG. 2, a first filament bundle including a plurality of filaments is prepared (S10). The first filament bundle has a length longer than the length of the final filament bundle to be produced. Meanwhile, the first filament bundle may be rotationally twisted (TM), cross twisted (CTM), or braided. Alternatively, the first filament bundle may be a simple filament bundle without such twisting or braiding. Optionally, the first filament bundle may consist of textured filaments.

In this specification, 'rotational twist' means that a plurality of filaments have a twist due to rotation. This is the case, for example, when the filament group is twisted as a whole.

In this specification, 'cross-twist' means that the filaments have a twist due to rotation and a twist due to revolution at the same time. For example, this corresponds to the case where two filament groups, each with a rotational twist, are crossed and twisted. For example, Senegal twist braid corresponds to a bundle of filaments with alternating twists.

The filaments of the first filament bundle may be made of polymer. The polymer of the filament is not particularly limited, and a polymer suitable for the characteristics required for the desired style can be selected. Polymers of the filament include, for example, polyvinyl chloride (PVC), polyvinylidene chloride (e.g., brand name MODACRYL), polyester polymers (PET, PBT, PTT, PEN, PCT, etc.), and polypropylene ( PP), polyethylene (PE), acrylic polymer, polycarbonate (PC), polymethyl methacrylate (PMMA), polystyrene (PS), acrylonitrile-styrene-acrylate (ASA) polymer, polyacrylate (PAR) , polyphenylene sulfide (PPS), or two or more polymer alloys thereof. The polymer alloy may be, for example, an alloy of PC/ABS, PC/PET, or PC/PMMA. The polymer of the filament may be an amorphous polymer or, for example, a semi-crystalline polymer with a crystallinity degree of 30% or less and a crystallinity degree of 20% or less.

For example, the first filament bundle may be provided in the form of spin draw yarn (SDY), or in the form of spinning undrawn yarn (UDY) and then going through two stages of stretching and heat setting. The characteristics of the filament can be adjusted by adjusting the conditions of the material, spinning, stretching, and heat setting of the filament bundle. The first filament bundle may have a thickness of, for example, 20 to 150 denier, or 50 to 130 denier, or 80 to 100 denier.

The tensile strength of the filament may be 3.0 to 0.1 g/d, or 2.0 to 0.1 g/d, or 1.5 to 0.15 g/d, or 1.5 to 0.1 g/d. The rapid tensile elongation at break and rapid tensile elongation at yield of the filament may be independently 80% or less, or 50% or less, or 30% or less, or 20% or less, or 10% or less. If the rapid tensile elongation at rupture is too low under room temperature and general humidity conditions, some of the filaments in the filament bundle become brittle to the point where they fall off like crumbs, and if it is too high, severe tangles occur during instantaneous rapid tensile rupture, losing aesthetic value. . The rapid tensile elongation at yield of the filaments is smaller than the rapid tensile elongation at break, and the difference between the rapid tensile elongation at yield and the rapid tensile elongation at break should not be too large so that the filaments can be broken immediately without stretching, so that tangling of the filaments at breakage occurs. It is small and can satisfy beauty characteristics. The ratio (YESB/BESB) of the rapid tensile elongation at yield (YESB) and rapid tensile elongation at break (BESB) of the filaments is, for example, 0.1 or more and 1.0 or less, 0.2 or more and 1.0 or less, 0.2. It may be 0.9 or less, 0.3 or more and 1.0 or less, 0.3 or more and 0.8 or less, 0.4 or more and 1.0 or less, and 0.5 or more and 1.0 or less. For measurement conditions of the tensile strength, rapid tensile elongation at break, and rapid tensile elongation at yield of the above-mentioned filaments, refer to the description of the test examples described below. In this specification, 'rapid tension' means tension with a rapidly fast tensioning speed. For example, this means that the speed of pulling the filament bundle is 100 mm/sec or more.

When the tensile strength, rapid tensile elongation at break, rapid tensile elongation at yield, and the ratio of rapid tensile elongation at yield to rapid tensile elongation at break of the above-described filaments are in the above range, the straightness of the filaments is in a range that can satisfy the beauty characteristics of the filament bundle after fracture. can be maintained. The straightness of the filaments can be evaluated by the degree of distortion of the filaments. For example, severe tangling that deviates from the longitudinal direction of the filament bundle, such as the filaments curling up like a pig's tail due to breakage, is a case where the straightness of the filaments is not maintained. Evaluation related to the straightness of the filaments will be described later.

An instantaneous tensile force is applied to the first position of the first filament bundle to break the filament bundle (S20). At this time, rupture irregularity (PT) can be used for rupture. Figure 3 is a photograph of an example of a fracture irregularity that can be used in this embodiment. Referring to Figure 3, the filament bundle is raised so that the first position of the filament bundle is between the two sets of the fracture irregularities, as indicated by an arrow, and then the filament bundle is fixed to the set. Both groups are moved at high speed in opposite directions along the length of the filament bundle to apply an instantaneous tensile force to break the first filament bundle. The first filament bundle may be broken by moving both groups at a speed of at least 100 mm/sec or more, for example, 150 mm/sec or more, for example, 200 mm/sec to 300 mm/sec. At this time, the moving speed of the group may be 1000 mm/sec or less, for example, 900 mm/sec or less, for example, 800 mm/sec or less.

The location at which each filament in the first filament bundle breaks between both sets may be different. Therefore, the length of each broken filament may be different. For example, if the distance (L1) between both groups is 100 mm, the length (L2) from the end of one group to the end of each filament broken by engaging the group may be randomly distributed in the range of 0-100 mm. Similarly, the length (L3) from the end of another group to the end of each filament broken while engaging with the group may be randomly distributed in the range of 0-100 mm. The lengths (L2, L3) of the random filaments may, for example, be evenly distributed in the range of 0-100 mm independently of each other, or may be more distributed in a specific section. As described above, the lengths (L2, L3) of random filaments depend on the distance between threads (L1). Therefore, if the distance between the threads (L1) is short, the range of the lengths (L2, L3) of the random filaments is also shortened, so the slope length of the lengths (L2, L3) is also shortened. On the other hand, as the distance between the threads (L1) becomes longer, the range of the lengths (L2, L3) of the random filaments also widens, so the slope length of the lengths (L2, L3) also increases.

An instantaneous tensile force is applied to the second position of the first filament bundle broken in step (S20) to break the first filament bundle (S30). The first filament bundle is raised so that the second position of the first filament bundle is between the two irregularly broken groups, and then the filament bundle is fixed to the group. Both groups are moved at high speed in opposite directions along the length of the filament bundle to apply an instantaneous tensile force to break the first filament bundle. The method of breaking the first filament bundle in this step is the same as the method of breaking the first filament bundle in step (S20), except that the position of the filament bundle in the breaking irregularity is changed to the second position. The distance between the first and second positions of the first filament bundle may correspond to the length of the final filament bundle to be produced. For example, the second filament bundle can be manufactured in various lengths such as 50cm, 60cm, 70cm, 80cm, 90cm, and 1m.

Additionally, the middle part of the second filament bundle is cut and divided into two to form a straight face at one end, and the other end is one of the ends (2, 3) of the second filament bundle, and has a pointed cone shape with an inclined length due to fracture. A third filament bundle having a can be formed. The cutting can be done using, for example, scissors or a rotary knife.

Hereinafter, the filament bundle for a wig having both ends having warp lengths manufactured by performing the steps (S10) to (S30) described above will be described in detail.

(Bundles of filament for wigs)

4A to 4C show the first position ((a) position) and the second position ((b) position) of the first filament bundle 10' including a plurality of filaments 11 on both sides of the fracture irregularity. This is a conceptual diagram showing the second filament bundle 10 formed when placed between the filaments and broken. 4A and 4B, the filaments 11 constituting the filament bundles 10' and 10 are shown in an unfolded form. Referring to Figure 4b, the second filament bundle 10 includes a middle portion 1 and ends 2 and 3 connected to both sides of the middle portion 1, and is composed of a plurality of filaments 11. The middle portion 1 is a portion where the filaments 11 constituting the filament bundle 10 are all the same length, and the end portions 2 and 3 are portions where the filaments 11 have different lengths. The middle portion (1) corresponds to the portion located outside the filament, including the portion that is pressed against the irregularly fractured filaments when the filament bundle is broken, and the end portions (2, 3) correspond to portions located between the filament bundles.

For example, the length of the middle portion 1 may be LN, the lengths of the end portions 2 and 3 may be L2 and L3, respectively, and L2 and L3 may be the same or different. At this time, the lengths of the filaments 11 at the ends 2 and 3 may be randomly distributed between 0 and L2 or 0 and L3, respectively. Therefore, the length of each filament 11 is different from each other and may be randomly distributed between LN and LN+L2+L3. Since the length of the filaments 11 has a random distribution in the above range, when the unfolded filament bundle 10 is gathered, both ends 2 and 3 form a pointed cone shape (PT: Pencil Tapering). In other words, the present invention replaces the conventional cumbersome trimming operation, which requires a lot of labor and work time because it can only be made by combing them one by one, with a simple breaking operation, thereby showing the raging effect of the filament bundle. In this specification, the effect or anomalous effect with such a slope length is also referred to as the PT effect (PTE: Pencil Tapering Shape Effect).

FIG. 5 is a diagram showing a third filament bundle 20 formed by cutting the middle portion 1 of the second filament bundle 10 in which both ends 2 and 3 are broken. As shown in Figure 5, one end (4) of the third filament bundle (20) forms a straight surface by cutting, and the other ends (2, 3) are inclined by breaking like the second filament bundle (10). It has a long, pointed cone shape. The third filament bundle 20 of this type can be mainly used in making wig products that require a sewing process, for example, weaving or wigs.

Figure 6 shows a filament bundle subjected to pre-stretch using a conventional one length group (1st stage), two length groups (2nd stage), or three length groups (3rd stage) and the present invention. This table shows the length distribution of the filaments in one cycle of the filament bundle manufactured by. In the table above, the end of each filament bundle is shown for comparison.

In this specification, a length group refers to a group of filaments that contain more than 20% of the total filaments in the filament bundle and have the same length. The filament bundle for a wig is usually folded in half and connected to the hair or wig base. In some cases, the filament bundle that has undergone conventional roughing work may be cut in half and used. In this specification, the length before cutting the filament bundle in half is referred to as 1 cycle. Even in a filament bundle that has undergone roughing by a conventional method, the length of the filaments in one cycle is determined by the number of stages. Referring to Figure 6, the length of the filaments of the filament bundle composed of one stage is one type, the length of the filaments of the filament bundle composed of two stages is two types, and the length of filaments of the filament bundle composed of three stages is three types. . On the other hand, the lengths of the filaments of the filament bundle produced by the present invention are distributed in various ways and have inclined lengths.

According to the manufacturing method of this embodiment, a natural and beautiful form is applied to the end of the filament bundle by a simple method of breaking, rather than the conventional method of performing pre-stretching work by hand or combing, which is complicated and requires skill. The PT effect can be realized by creating a sensible slope length.

In addition, since the actual length of the filaments in the filament bundle manufactured by the conventional method is fixed according to the number of filaments, if the irregular work is performed by an unskilled worker or consumer, the end of the filament bundle may not have a natural inclined length. You can. However, according to the present invention, a filament bundle having a PT effect can be manufactured naturally using a standardized breaking process. Since the filaments in the filament bundle have a random length distribution, the ends of the filament bundle can have a natural inclined length.

In addition, according to the present invention, grouped filament bundles that cannot be straightened by hand or combing, that is, rotary twisted, cross-twisted, or braided filament bundles, can naturally have a PT effect.

(wig)

A wig according to one form of the present invention may include a bundle of wig filaments manufactured by the above-described method.

(Evaluation of filament bundles after fracture)

The filament bundle created by fracture can have a sense of beauty only when the ends have a natural inclined length and there is no distortion such as twisting or tangling of the filaments at the fracture site. When broken, the filament stretches and becomes distorted like a pig's tail. When braiding or other processing is performed, the appearance of the product can be extremely poor due to the distortion of the filament. Additionally, some filaments may not break properly and may only appear to stretch. Filament bundles can be evaluated with respect to distortions such as twisting and tangling of these filaments.

On the other hand, the bundle end caused by rapid tensile rupture is different from the existing cutting method, that is, the bundle end obtained by cutting with scissors or a rotating knife, and this can be confirmed by enlarging the photo under a microscope.

Evaluation of grouped filament bundles, including braids or rotary twists or cross twists, can be obtained by comparing the diameters of one filament group in the filament bundle before and after breakage. The diameter of one filament group can be measured by taking a photo looking directly at the end of the filament group. Figure 7 is a conceptual diagram comparing the diameter of one filament group among the filament bundles before and after fracture. Referring to Figure 7, the diameter of the filament group before fracture (D ₀ ) and the diameter of the filament group after fracture (D _b ) can both be measured as the thickest part of the filament group when looking directly at the end of the filament group. . Alternatively, if the cross-section of the filament group is oval, the diameter (D ₀ , D _b ) of the filament group can be obtained as the arithmetic average of the longest and shortest diameters of the thickest part.

If the filaments are broken without distortion, such as when cut with scissors, the diameter after fracture (D _b ) will be equal to the diameter before fracture (D ₀ ). If distortion, such as partial bending of the filaments, occurs due to breakage, the diameter after breakage (D _b ) will be larger than the diameter before breakage (D ₀ ).

Meanwhile, the filament may physically spread due to impact upon breaking, but this is not related to tangling, which is an irreversible change in shape of the filament, and can return to its original position during the normal trimming process of the filament bundle. Therefore, the area around the fracture of the filament bundle was neatly trimmed and the filament group diameter (D _b ) of one of the filament bundles was evaluated.

When the ratio (D _b /D ₀ ) of the filament group diameter after fracture (D _b ) to the filament group diameter (D ₀ ) before fracture is expressed as bulkiness, the value of bulkiness of the filament bundle produced by the present invention is It may be 1.8 or less, or 1.3 or less, or 1.15 or less, or 1.1 or less, or 1.05 or less, and may be 0.5 or more. If the bulkiness is within the above range, the filament bundle may have a good appearance after breaking.

Alternatively, the change in filament group diameter (D ₀ , D _b ) upon fracture can be expressed as the fracture distortion (D _g ) of the filament according to the following equation (1).

Fracture distortion of filament group (D _g ) = {(D _b -D ₀ )/D ₀ }×100 (%) (1)

Figure 8 is a conceptual diagram showing a method for evaluating the shape of a simple filament bundle that is not grouped and does not contain braids or twists. Referring to FIG. 8, a predetermined number of filaments are arranged side by side at regular intervals and fixed to an adhesive tape, then the width (W ₀ ) of the filament array is measured, the width (W _b ) after fracture of the filament array is measured, and the following This can be done by calculating the fracture distortion according to equation (2).

Breaking distortion of simple filament (D _w ) = {(W _b -W ₀ )/W ₀ }×100 (%) (2)

The distortion value of the grouped filaments or simple filaments produced by the present invention may be 50% or less, 30% or less, 15% or less, 10% or less, 5% or less, and -50% or more. If the degree of distortion is within the above range, the filament bundle after fracture can have a good appearance without distortion such as tangling or stretching of the filament, and the beauty value may not be damaged during final braiding or other post-processing.

(Test example)

Filament can be manufactured using a two-step method of spinning straight spinning (SDY: Spin Draw yarn) or undrawn yarn (UDY: Unrawn yarn), followed by stretching and heat setting. By adjusting the conditions of stretching and heat setting according to the type of material selected during the spinning stretching process, filaments for wigs having the same breaking distortion and rapid tensile elongation at break (BESB) as in the Examples and Comparative Examples described later can be manufactured and used.

Manufacturing of filament

Manufacturing Example 1

1) Compounding

100 parts by weight is a resin containing 90% by weight of polyvinyl chloride resin (PVC) with a degree of polymerization of 1,200 and 10% by weight of chlorinated vinyl chloride resin (CPVC) with a chlorination rate of 67%, and an appropriate amount of processing aid, heat stabilizer, and pigment is added to the resin. Mixed and uniformly blended. This mixture was pelletized in a 50 mm compounder. The temperature of the compounder was 130°C in the resin supply section, 180°C in the compression section, 190°C in the melting section, and 210°C in the die section, and the screw rotation speed was 30 rpm.

2) radiation

The pellets produced in the compounding process were supplied to a single-axis spinner to spin filaments. The temperature of each part of the single-axis spinner was 160°C in the resin supply section, 180°C in the compression section, 200°C in the melting section, and 210°C in the head section. A nozzle with a Y-shaped cross-section was used, the number of holes in all nozzles was 80, and the cross-sectional area of one nozzle hole was 0.5 ㎟.

3) Stretching and heat setting

The spun filament was stretched by contact heating using the speed difference between the two sets of rollers, and heat setting was performed at a temperature of 100°C in a heat setting device connected to the stretching device. The tension of the fiber was maintained uniformly during heat setting.

4) Under the above spinning conditions, a 60-denier PVC-based wig filament yarn having the tensile strength and rapid tensile elongation at break (BESB) described later was manufactured by adjusting the winding speed and stretching conditions of the undrawn yarn.

Preparation Examples 2 and 3

1) Polyester chips with an intrinsic viscosity of 0.65 were dried in a vacuum dryer at 80°C for 8 hours, and were put into a 60mm extruder equipped with a 120-hole spinneret with a peanut-shaped cross-sectional structure.

2) At this time, the extruder cylinder temperature was set at 250°C and the spinneret temperature was set at 270°C. The unstretched yarn was stretched with dry heat at 80°C and then relaxed to produce filament yarn for a wig.

3) Under the above spinning conditions, a 50 denier polyester wig filament yarn having the tensile strength and rapid tensile elongation at break (BESB) described later was manufactured by adjusting the winding speed and stretching conditions of the undrawn yarn.

Comparative Preparation Examples 1 and 2

1) Polyester chips with an intrinsic viscosity of 0.65 were dried in a vacuum dryer at 80°C for 8 hours, and were put into a 60mm extruder equipped with a 120-hole spinneret with a peanut-shaped cross-sectional structure.

2) At this time, the cylinder temperature of the extruder was set at 240°C and the spinneret temperature was set at 260°C.

3) After going through direct spinning air-cooled quenching, it went through a stretching process with a 6-stage godet roll (GR), and then heat set to produce filament yarn for wigs.

4) At this time, the speed of 1GR is varied and the draft ratio, quenching (cooling) speed, and stretching and relaxation processes up to 1GR and 6GR are adjusted to obtain the tensile strength and rapid tensile elongation at break (BESB), which will be described later. ), a 50 denier polyester filament yarn for wigs was manufactured.

Comparative Preparation Examples 3, 4 and 5

1) Compounding

100 parts by weight of a resin containing 50% by weight of polyvinyl chloride resin (PVC) with a degree of polymerization of 1,200, 10% by weight of chlorinated vinyl chloride resin (CPVC) with a chlorination rate of 67%, and 40% by weight of acrylonitrile butadiene styrene (ABS), Processing aids, heat stabilizers, and pigments were mixed in appropriate amounts and mixed evenly. This mixture was pelletized in a 50 mm compounder. The temperature of the compounder was 130°C in the resin supply section, 190°C in the compression section, 200°C in the melting section, and 215°C in the die section, and the screw rotation speed was 30 rpm.

2) radiation

The pellets produced in the compounding process were supplied to a single-axis spinner and spun. The temperature of each part of the single-axis spinner was 170°C in the resin supply section, 190°C in the compression section, 210°C in the melting section, and 215°C in the head section. A nozzle with a Y-shaped cross-section was used, the number of holes in the total nozzle was 80, and the cross-sectional area of one nozzle hole was 0.5 ㎟.

2) Stretching and heat setting

The spun filament was stretched by contact heating using the speed difference between the two sets of rollers, and heat setting was performed at a temperature of 100°C in a heat setting device connected to the stretching device. The tension of the fiber was maintained uniformly during heat setting.

4) Under the above spinning conditions, three types of 60 denier PVC alloy filament yarns for wigs with tensile strength and rapid tensile elongation at break (BESB) described later were manufactured by adjusting the winding speed and stretching conditions of the undrawn yarn.

The wig filaments prepared in Preparation Examples 1 to 3 and Comparative Preparation Examples 1 to 5 were used as materials for the wig filament bundles of Examples 1 to 3 and Comparative Examples 1 to 5 of the present invention, which will be described later. The model names for the filaments manufactured in Preparation Examples 1 to 3 and Comparative Preparation Examples 1 to 5 are shown in Table 1.

Filament material used Manufacturing method model name Example 1 Manufacturing Example 1 NEO TEX (E4) Example 2 Production example 2 Q TEX (QRB) Example 3 Production example 3 QTEX (QCB) Comparative Example 1 Comparative Manufacturing Example 1 COORDI (TY1) Comparative Example 2 Comparative Manufacturing Example 2 COORD I(PB2) Comparative Example 3 Comparative Manufacturing Example 3 NEO TEX (EM) Comparative Example 4 Comparative Manufacturing Example 4 NEO TEX (E1) Comparative Example 5 Comparative Manufacturing Example 5 NEO TEX (RVR)

Measurement of tensile strength

For the filaments prepared in Preparation Examples 1 to 3 and Comparative Preparation Examples 1 to 5, a filament bundle with a rotational twist was prepared by applying a rotation of 80 TM (8 times/10 cm) to each of the 240 filament strands. Each sample filament bundle was left in a constant temperature and humidity room under filament standard conditions, that is, a temperature of 25°C and a relative humidity (RH) of 65% for 24 hours, and then a tensile strength measuring device (model LRX plus, manufactured by Lloyd's Instruments) was used. The tensile strength was measured using . At this time, the distance between the jaws of the measuring device, that is, the initial length of the yarn, is set to 40 mm, the tensile speed is set to 200 mm/min, the load cell is 1 kN (=102 Kgf), and the initial load is set to 0.5 kgf. A tensile test was performed by tensioning one. To ensure the reliability of tensile strength data, tensile tests were performed on each material five times to obtain the average tensile strength, and the values for Examples 1 to 3 and Comparative Examples 1 to 5 are shown in Table 2.

Irregular fracture condition

The filament bundle was broken using a PT machine (model name: PREPEN-N, manufacturer: FINETECHNICS.CO., LTD.), and the rapid tensile elongation at break of the filament bundle was measured. This breaking device induces breakage by applying momentary tensile (rapid tensile) tension to the filament bundle using the movement (stoke) of cylinders to which pneumatic pressure of 6 kgf/cm ² is applied by a regulator. The specifications are as follows. Same as

1. Force pressing the filament by the pneumatic cylinder (F1):

The force that presses the jaw in the direction perpendicular to the length of the filament

1) Cylinder specifications (Spec.): Diameter (D) = 63 mm, moving distance = 50 mm

2) Pneumatic: 6 Kgf/ ^cm2

3) F1 = (3.14 * 6.3^2 /4) * 6 = 187 Kgf

2. Tensile force on filament by pneumatic cylinder (F2):

The force that applies instantaneous tension in both directions of the filament length by two jaws

1) Cylinder specifications (Spec.): Diameter (D) = 100 mm, moving distance 150 mm

2) Pneumatic: 6 Kgf/ ^cm2

3) F2 = (3.14 * 10^2 /4) * 6 = 471Kgf

3. Movement distance (D) of each group due to instantaneous tension (rapid tension application) = 150mm

4. Movement speed of each group by instantaneous tension (rapid tension application) (V) = 150 mm/sec

Measurement of rapid tensile elongation at break

For the filaments of Preparation Examples 1 to 3 and Comparative Preparation Examples 1 to 5, 10 filaments each with a length of 30 cm were prepared. For each example, the 10 filaments were arranged side by side at 10 mm intervals and fixed to adhesive tape to form a filament array. The filament arrays for the filaments of Preparation Examples 1 to 3 and Comparative Preparation Examples 1 to 5 were left in a constant temperature and humidity room under filament standard conditions, that is, a temperature of 25°C and a relative humidity (RH) of 65% for 24 hours. , the rapid tensile elongation at break (BESB) (%) was measured using a break irregularity machine (PT machine). After the filament array is tensioned and bitten into both jaws of the fracture irregularity, the distance between the jaws, that is, the initial length of the filament, is set to 30 mm, and the tensile speed is set to 150 mm/sec, and the two jaws are stretched in both directions. The filament array was rapidly stretched by moving. The average length of the filaments when all 10 filaments were broken was measured and compared with the initial length to obtain the rapid tensile elongation at break (%). To ensure the reliability of the rapid tensile elongation at break data, the rapid tensile elongation at break test was performed five times each to obtain an average value, and the values for Examples 1 to 3 and Comparative Examples 1 to 5 are shown in Table 2.

filament material tensile strength
(g/d) Rapid tensile elongation at break
(%) Example 1 NEO TEX (E4) 1.3 11 Example 2 Q TEX (QRB) 0.4 36 Example 3 QTEX (QCB) 0.3 13 Comparative Example 1 COORDI (TY1) 1.3 96 Comparative Example 2 COORD I(PB2) 1.4 112 Comparative Example 3 NEO TEX (EM) 1.1 62 Comparative Example 4 NEO TEX (E1) 1.6 75 Comparative Example 5 NEO TEX (RVR) 1.6 115

Fracture of grouped filament bundles

The filaments prepared in Preparation Examples 1 to 3 and Comparative Preparation Examples 1 to 5 were grouped into a plurality of filament bundles (SD70, D80, D60, TB460, VL21, VL14, BD20, TS01) with a rotational twist for each filament group. ) was prepared. The filament bundle was left in a constant temperature and humidity room at a temperature of 25°C and a relative humidity of 85% RH for 24 hours under standard filament conditions, and then broken using a breaking device.

The filament bundle was clamped under tension to both sides of the breaking razor with the initial distance between the groups set to 30 mm, and both groups were moved in opposite directions at a speed of 150 mm/sec to break the grouped filament bundle.

Figure 9 is a photograph of a grouped filament bundle sample with both sides broken according to one embodiment, neatly folded in half. Referring to FIG. 9, the filament bundle sample includes a plurality of filament groups, each of which is twisted in rotation, and the filament bundle has a sharp end due to fracture.

Measurement of fracture distortion of grouped filament bundles

The diameters (D ₀ , D _b ) of the filament bundles were measured by taking photographs looking straight at the ends of the filament groups within the marked filament bundle before and after fracture. When the cross-section of the filament group was oval, the diameter (D ₀ , D _b ) of the filament group was obtained as the arithmetic mean of the longest and shortest diameters of the thickest part.

When evaluating the fracture distortion of the filament bundle, the part where the filament spread three-dimensionally due to the impact of rapid tensile fracture has different physical properties from the distortion of the filament bundle, so the fracture region of the filament bundle was neatly trimmed and the fracture distortion was evaluated. In particular, in the case of grouped textured strands, the spread due to tension is further aggravated at that moment, so in order to more objectively evaluate the degree of distortion excluding this phenomenon, the left and right ends of the longitudinal direction of the sample sandwiched between the strands and the strands are examined. White paint is painted on the sample part outside (outside) of the tank (i.e., the sample part in the initial state, the part that serves as the standard for the appearance during measurement), and based on this, the spread part due to the instantaneous tensile force is adjusted to twist the initial state of rotation. After making the number (TM number: No. of Twist per meter), the degree of distortion (D _g ) was evaluated according to the equation (1) below.

D _g = {(D _b -D ₀ )/D ₀ }×100 (%) (1)

Table 3 shows the measured fracture distortion for the grouped filament bundles of Examples 1 to 3 and Comparative Examples 1 to 5, respectively. In Table 3, D ₀ , D _b , and D _g represent the filament group diameter before and after fracture (D ₀ , D _b ) and the fracture distortion of the filament group (D _g ), respectively. The diameter (D _b ) is the diameter of the filament group after temporary spreading due to the fracture impact of the filament bundle has been adjusted. The fracture distortion (D _g ) is a value obtained for both filaments separated after three samples (filament groups) are broken, and D _{g (av)} is the average value of these (D _g ). In Table 3, samples #1, 2, and 3 refer to different filament groups within the same filament bundle, and the left and right represent filaments divided in two by the same break, respectively. Photographs of the fractured filament groups in Examples 1 to 3 are shown in FIGS. 10A to 10C, respectively, and photographs of the fractured filament groups in Comparative Examples 1 to 5 are shown in FIGS. 11A to 11E, respectively. Referring to FIGS. 10A to 10C and 11A to 11E, the fractured ends of the filament groups of Examples 1 to 3 have a sharp inclined length, while the fractured ends of the filament groups of Comparative Examples 1 to 5 are blunt or filament-like. It can be seen that severe tangling occurs.

unit
(mm) Example 1 (NEO TEX (E4)) (SD70) Sample #1 Sample #2 Sample #3 left right left right left right D ₀ 7 7 7 8 7 7 D _b 8 8 10 9 8 8 D _g 14% 14% 43% 13% 14% 14% D _g(av) 19% unit
(mm) Example 2 (Q TEX (QRB)) (DP80) Sample #1 Sample #2 Sample #3 left right left right left right D ₀ 9 9 9 9 9 9 D _b 18 15 14 15 16 14 D _g 100% 67% 56% 67% 78% 56% D _g(av) 70% unit
(mm) Example 3 (Q TEX (QCB)) (D60) Sample #1 Sample #2 Sample #3 left right left right left right D ₀ 8 8 9 9 9 9 D _b 10 11 13 12 12.5 13 D _g 25% 38% 44% 33% 39% 44% D _g(av) 37% unit
(mm) Comparative Example 1 (COORDI (TY1)) (TB460) Sample #1 Sample #2 Sample #3 left right left right left right D ₀ 3 3 3 3 3 3 D _b 8 6 6.5 8 7 6 D _g 167% 100% 117% 167% 133% 100% D _g(av) 131% unit
(mm) Comparative Example 2 (COORD I(PB2)) (VL21) Sample #1 Sample #2 Sample #3 left right left right left right D ₀ 10 10 10 10 10 10 D _b 8 8 10 9 8 8 D _g 14% 14% 43% 13% 14% 14% D _g(av) 142% unit
(mm) Comparative Example 3 (NEO TEX (EM)) (VL14) Sample #1 Sample #2 Sample #3 left right left right left right D ₀ 8 8 8 8 8 8 D _b 16 17 17 18 19 17 D _g 100% 113% 113% 125% 138% 113% D _g(av) 117% unit
(mm) Comparative Example 4 (NEO TEX (E1)) (BD20) Sample #1 Sample #2 Sample #3 left right left right left right D ₀ 7 7 7 7 7 7 D _b 13 13 16 15 13 13 D _g 86% 86% 129% 114% 86% 86% D _g(av) 98% unit
(mm) Comparative Example 5 (NEO TEX (RVR) (TS01) Sample #1 Sample #2 Sample #3 left right left right left right D ₀ 10 10 10 10 10 10 D _b 30 33 38 36 32 38 D _g 200% 230% 280% 260% 220% 280% D _g(av) 245%

Referring to Table 3, the average fracture distortion (D _g(av) ) for the grouped filament bundles of Examples 1 to 3 is 19%, 70%, and 37%, respectively, and has a value of 70% or less. On the other hand, for the grouped filament bundles of Comparative Examples 1 to 5, the average fracture distortion (D _g(av) ) was 131%, 142%, 117%, 98%, and 245%, which is a value of 98% or more.

Breakage of simple filament bundles

Ungrouped filament bundle samples were prepared for the filaments of Examples 1 to 3 and Comparative Examples 1 to 5. The filament bundle sample was left in a constant temperature and humidity room at a temperature of 25°C and a relative humidity of 85% RH for 24 hours under filament standard conditions, and then evaluated in that state.

A filament bundle sample consisting of 9,600 ungrouped filaments was clamped on both sides of a breaking irregularity device with an initial distance between the groups set to 30 mm, and both groups were moved in opposite directions at a speed of 150 mm/sec to break the filament bundle. . Subsequently, the filament bundle sample that was broken on one side was broken again in the same manner at a location 800 mm away from the fracture location. Figure 11 is a photograph of a simple filament bundle sample with both sides broken, neatly folded in half. Referring to FIG. 11, it can be seen that the number of filaments decreases toward the end of the sample filament bundle, resulting in a PT effect.

Measurement of fracture distortion of simple filament bundles

For the filaments of Examples 1 to 3 and Comparative Examples 1 to 5, 240 strands of 30 cm long filament were placed in a constant temperature and humidity room under standard filament conditions, that is, a temperature of 25°C and a relative humidity (RH) of 65% for 24 hours. It was left unattended. After aligning the starting lines for the filaments of Examples 1 to 3 and Comparative Examples 1 to 5, the filaments were arranged side by side with as close contact as possible, and then fixed with adhesive tape to form a planar filament arrangement (filament adhesion group). For each filament array, the width (W ₀ ) of the filament array before fracture was measured. Next, the filament array was clamped under tension to both jaws of the breaking irregularity with the initial distance between the jaws set to 30 mm, and the filament array was broken by moving both jaws in opposite directions at a speed of 150 mm/sec. Then, the width (W _b ) of the fractured filament array was measured.

At this time, since the part where the filament was disturbed due to the fracture shock is unrelated to the actual filament distortion, it was returned to its original close arrangement and the width (W _b ) of the filament array after fracture was measured according to the degree of tangle developed.

When evaluating the fracture distortion of the filament, the area where the filament spread due to the rapid tensile fracture impact had different physical properties from the distortion, so the fracture area was neatly trimmed and the width was measured. For more objective evaluation, white is applied to the left and right ends of the specimen in the longitudinal direction between the jaws and the part of the sample outside the jaw (i.e., the part of the sample in its original state that serves as the standard for the appearance when measured). Paint was applied, and the spread parts caused by instantaneous tensile force were adjusted based on this to return to the initial state of alignment, and then the degree of distortion (D _w ) shown in equation (2) below was evaluated.

D _w = {(W _b -W ₀ )/W ₀ }×100 (%) (2).

In order to ensure the reliability of the breaking distortion data, the breaking distortion evaluation test was performed three times each to obtain the average distortion (D _w(av) ) for both broken filaments, which was calculated as the average breaking distortion of the grouped filament bundles. The degrees are shown in Table 4 along with the measured values (D _g(av) ).

filament material Average fracture distortion of grouped filament bundles (D _g(av) ) (%) Average fracture distortion of a simple filament bundle
(D _w(av) ) (%) Example 1 NEO TEX (E4) 19 19 Example 2 Q TEX (QRB) 70 35 Example 3 QTEX (QCB) 37 22 Comparative Example 1 COORDI (TY1) 131 127 Comparative Example 2 COORD I(PB2) 142 158 Comparative Example 3 NEO TEX (EM) 117 125 Comparative Example 4 NEO TEX (E1) 98 78 Comparative Example 5 NEO TEX (RVR) 245 225

Referring to Table 4, the average breaking distortion (D _w(av) ) of the simple filament bundles of the grouped filament bundles of Examples 1 to 3 shows a good value of 19-22%, but the average breaking distortion of the simple filament bundles of Examples 1 to 3 is 19-22%. The average fracture distortion (D _w(av) ) of a simple filament bundle of a grouped filament bundle is 78-225%, indicating that significant distortion occurs after fracture.

Referring again to Tables 2 and 4, the tensile strength and rapid tensile elongation at break of Examples 1 to 3 are lower than those of Comparative Examples 1 to 5, which is lower than those of Comparative Examples 1 to 5. It is believed that the filament bundle of 3 has an effect on having good fracture distortion.

Claims (13)

A second filament bundle created by applying instantaneous tension in both directions of the length of the first filament bundle of 20 to 150 denier to break it at first and second positions spaced apart by a predetermined length,
The second filament bundle includes a middle portion and first and second ends wherein portions broken at the first position and the second position are connected to both sides of the middle portion,
The filaments of the middle portion have the same length, and the filaments of the first end and the second end have a random length distribution and a gradient length distribution when arranged in length order,
wherein the second filament bundle does not include more than one length group,
The length group refers to a group of filaments containing more than 20% of the total filaments and having substantially the same length,
The filaments in the second filament bundle have a random length distribution and a gradient length distribution when arranged in length order,
A filament bundle for a wig wherein the first and second ends have a sharp conical shape (PT: Pencil Tapering) when the second filament bundle is gathered three-dimensionally. According to claim 1,
A third made by cutting and separating the second filament bundle to include the entire or part of the middle part of the second filament bundle and the first end, or to include the whole or part of the middle part of the second filament bundle and the second end. As a bundle of filaments,
The filaments in the third filament bundle have a random length distribution, have a gradient length distribution when arranged in length order, and when three-dimensionally gathered around the longest filament, the opposite end of the cut and separated end A bundle of filaments for wigs with a pointed cone shape (PT: Pencil Tapering). According to claim 1,
The rapid tensile elongation at break (BESB) and the rapid tensile elongation at yield (YESB) of the second filament bundle are both 50% or less, and the ratio of the rapid tensile elongation at yield (YESB) to the rapid tensile elongation at break (BESB) (YESB/BESB) A bundle of filament for wigs with a value of 1.0 or less. According to clause 2,
The rapid tensile elongation at break (BESB) and the rapid tensile elongation at yield (YESB) of the third filament bundle are both 50% or less, and the ratio of the rapid tensile elongation at yield (YESB) to the rapid tensile elongation at break (BESB) (YESB/BESB) A bundle of filament for wigs with a value of 1.0 or less. According to claim 1,
The rapid tensile elongation at break (BESB) and rapid tensile elongation at yield (YESB) of the second filament bundle are both 50% or less, and the tensile strength is 1.5 to 0.1 g/d. According to clause 2,
The rapid tensile elongation at break (BESB) and rapid tensile elongation at yield (YESB) of the third filament bundle are both 50% or less, and the tensile strength is 1.5 to 0.1 g/d. According to claim 1,
The second filament bundle includes a plurality of filament groups, and each filament group is rotary twisted (TM) or cross twisted (CTM). According to clause 2,
The third filament bundle includes a plurality of filament groups, and each filament group is rotary twisted (TM) or cross twisted (CTM). According to claim 7 or 8,
One of the filament groups has a diameter before fracture (D ₀ ) and a diameter after fracture (D _b ),
The diameter before breaking (D ₀ ) is the diameter of the thickest part when looking at the end of the filament group from the front before breaking the filament bundle (if the cross-section of the filament group is oval, the longest diameter and shortest diameter of the oval) arithmetic mean diameter),
The diameter after breaking (D _b ) is the diameter of the thickest part when the end of the filament group is viewed from the front after breaking the filament bundle (if the cross-section of the filament group is oval, the longest diameter and shortest diameter of the oval) arithmetic mean diameter),
Distortion that depends on Tangle (Dg) for the filament group is expressed in the following equation (1),
D _g = {(D _b -D ₀ )/D ₀ }×100 (%) (1)
A filament bundle for a wig having the breaking distortion of 80% or less. According to claim 1 or 2,
When 240 filaments of the filament bundle are arranged side by side in as close contact as possible and fixed to adhesive tape to form a filament array,
Distortion that depends on Tangle obtained from Equation (2) below for the width (W ₀ ) of the filament array before rupture of the filament array and the width (W _b ) of the filament array after rupture of the filament array. Filament bundles for wigs with (D _w ) of 50% or less:
D _w = {(W _b -W ₀ )/W ₀ }×100 (%) (2). A method of manufacturing a filament bundle for a wig, comprising:
(a) providing a first filament bundle comprising a plurality of filaments;
(b) breaking the first filament bundle at a first position by applying an instantaneous tensile force to the first filament bundle by pulling it from both sides at a speed of at least 100 mm/sec or more; and
(c) By applying an instantaneous tensile force to the first filament bundle broken at the first position by pulling it from both sides at a speed of at least 100 mm/sec, the first filament bundle is separated from the first position by a predetermined distance from the first position. breaking at two positions to form a second filament bundle; Including,
The second filament bundle includes a first end and a second end each including a broken portion at the first location and the second location, and an intermediate portion having the same length between the first end and the second end, and ,
wherein the second filament bundle does not include more than one length group,
The length group refers to a group of filaments containing more than 20% of the total filaments and having substantially the same length,
The filaments in the second filament bundle have a random length distribution and a gradient length distribution when arranged in length order,
A method of manufacturing a filament bundle for a wig in which the first and second ends have a sharp conical shape (PT: Pencil Tapering) when the second filament bundle is gathered three-dimensionally. The method of claim 11 above,
A third made by cutting and separating the second filament bundle to include the entire or part of the middle part of the second filament bundle and the first end, or to include the whole or part of the middle part of the second filament bundle and the second end. As a bundle of filaments,
The filaments in the third filament bundle have a random length distribution, have a gradient length distribution when arranged in length order, and when three-dimensionally gathered around the longest filament, the opposite end of the cut and separated end A method of manufacturing a filament bundle for a wig having a sharp cone shape (PT: Pencil Tapering). The method of claim 11 or 12,
The first filament bundle includes a plurality of filament groups grouped, and each filament group is rotary twisted (TM) or cross twisted (CTM).

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