Preassembled Synthetic Hair Assembly and Manufacturing Method Thereof

Abstract

The present disclosure relates to a preassembled synthetic hair assembly featuring distinct hairstyles with predefined outer contours and an optimized manufacturing process. The disclosure includes obliquely cut ends on both sides of the hair bundle at specific angles (α, β) relative to the strand length, facilitating natural layering and gradient length effects. A central fastening mechanism secures the bundle, which is then folded to achieve a desired outer contour like a waterfall, convex arc, or inverted teardrop shape. Customization is achieved by adjusting folding directions, strand length ratios (50%≤La / Lb≤80%), and incorporating additional fastening elements for varied aesthetic outcomes.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to synthetic hair products and in particular to a preassembled synthetic hair assembly with different hairstyles of predetermined outer contour and a streamlined manufacturing process.BACKGROUND

[0002] Wigs, artificial hair decorations designed for human use, have gained significant popularity alongside economic growth and evolving aesthetic preferences. These hair products, particularly ponytail-style wigs, are favored for their convenience in instantly transforming hairstyles, enhancing personal style, and requiring minimal maintenance, making them highly appealing to fashion-conscious individuals. Currently, wig materials primarily include natural fibers such as human hair, animal hair, and synthetic fibers. Recent trends in hairstyling have driven demand for innovative synthetic hair products that cater to modern, dynamic fashion needs. Synthetic hair, in particular, offers advantages in scalability and consistency, enabling the beauty industry to continuously introduce trendy hairstyles.

[0003] A Chinese disclosure patent application (Application No.: 201811331209.0) discloses a novel synthetic braiding hair and its manufacturing method. The synthetic braiding hair comprises: a first synthetic fiber bundle, which consists of numerous synthetic fibers and has a natural end shape; a second synthetic fiber bundle, which is composed of many fibers and possesses a natural end shape, with the length of its synthetic fibers being half that of the first synthetic fiber bundle. The second synthetic fiber bundle is aligned with the center of the first synthetic fiber bundle, and they are bent together to form a hook-like shape.

[0004] The present disclosure provides a product that enables users to easily attach strands from the hair bundle to their own hair without requiring hair stylists to conduct additional stretching and trimming work when braiding customers'hair. However, this product and its manufacturing process involve two or more bundles of hair of different lengths, with all strands in each bundle being of equal length. Each bundle must be stretched to form natural-looking hair ends, i.e., the hair strands gradually become sparse and thinner at the ends. Then, the bundles are combined concentrically and folded to obtain the desired the bundle of synthetic hair strands for braiding. This process requires obtaining and processing two or more bundles, which is laborious, time-consuming, and relatively inefficient.

[0005] Moreover, the outer contour of the combined bundles from multiple stretched bundles of different lengths is akin to a ponytail. The outer contour of the combined hair strands appears with uneven layers phenomena. After merging multiple bundles, uneven thickness in certain areas due to the combination causes the outer contour to have uneven layers.

[0006] Additionally, the hair strands in the combined bundles are uneven thickness in different areas. For instance, after stretching shorter bundles, their ends are fine and sparse. Longer bundles, with less stretching in the middle, when merged, result in uneven hair strand thickness and an uneven outer contour, compromising the overall layering and natural flow of the bundles. Thus, products from this process are only suitable for relatively fluffy braided hair.

[0007] If two or more synthetic hair bundles of different lengths, with each bundle's strands of equal length, are merged first and then stretched, the aforesaid problems can be alleviated. However, this may cause uneven gradients at each end of the bundle, leading to poor layering in braids. Also, if the length difference between bundles is significant and they are merged with centers aligned, the shorter bundle's ends appear at certain parts of the longer bundle. If the shorter bundle's ends are near the center or halfway along the longer bundle, grasping one end of the merged bundle becomes difficult, increasing stretching work complexity. Poor grasping of shorter strands during stretching causes center deviation, resulting in more defective products.

[0008] In summary, when using two or more synthetic fiber bundles of different lengths with each bundle's strands of equal length, both “stretch—first—merge—later” and “merge—first—stretch—later”approaches have quality-affecting factors and are labor—and time—consuming.

[0009] Therefore, designing a single bundle of synthetic hair strands for manufacturing a assembled synthetic hair assembly for braiding and its manufacturing method to address the aforesaid issues of synthetic braiding hair made from multiple bundles of different lengths with each bundle's strands of equal length is a pressing technological challenge.SUMMARY

[0010] The present disclosure addresses these drawbacks by introducing a single-bundle synthetic hair with oblique-cut ends, a first fastening member, and a folded configuration. Key innovations include:

[0011] 1. Oblique-Cut Ends: Both ends of the synthetic hair bundle are obliquely cut at predetermined angles (α, β) relative to the strand length direction, enabling gradient length changes and natural layering;

[0012] 2. Central Fastening and Folding: A first fastening member secures the bundle's center, which is then folded to form a predetermined outer contour (e.g., waterfall, convex arc, inverted teardrop);

[0013] 3. Customizable Contours: Adjust-meats to folding direction, strand length ratios (50%≤La / Lb≤80%), and additional fastening members (e.g., second band for buttonhole structures) allow diverse aesthetic outcomes;

[0014] 4. Efficient Manufacturing: A stream-lined method involving oblique cutting, combing, thermal stretching, and folding reduces production complexity while enhancing natural appearance.Product Structure

[0015] Synthetic Hair Bundle: Comprises a single bundle of synthetic strands with both oblique-cut ends. Strand length ratio: 50%≤La / Lb≤80% (La=shortest; Lb=longest). Predetermined angles: 20°<α<90°, 20°<β<90° (symmetric or asymmetric configurations).

[0016] Fastening Members: First fastening member Secures the bundle's central region, enabling folding toward La (shortest side) or Lb (longest side). Second fastening member (optional) Ties the folded bundle's neck region to form a buttonhole-like structure at the head portion.

[0017] Outer Contour Variations: A cascading contour with a predominantly linear or concave arcuate hemline configuration achieved by folding toward La, Convex arcuate hemline configuration, inverted teardrop, or Sweetheart shape Resulted from folding toward Lb, Ponytail-Like Contour Created via thermal stretching and blending of strand ends.Manufacturing MethodStep 1. Oblique Cutting: Both ends of the synthetic bundle are cut at angles α and β (symmetric or parallel configurations).

[0019] Step 2. Combing and Blending: Strand ends are combed to establish a predetermined outer contour.

[0020] Step 3. Thermal Stretching: Tail-end strands are stretched to enhance fluffiness and natural tapered ends.

[0021] Step 4. Central Fastening and Folding: The bundle is secured with a first fastening member and folded at the tied region.

[0022] Step 5. Optional Second Fastening: A second band is tied at the folded bundle's neck to form a buttonhole structure.

[0023] The present disclosure provides improvements over conventional implementation through several key technical advancements:

[0024] 1. Manufacturing Simplification: The single-bundle processing methodology eliminates the need for multi-bundle alignment operations and subsequent merging steps, thereby reducing production complexity, streamlining manufacturing, and associated labor costs. This integrated approach achieves at least a 20% reduction in assembly time compared to traditional multi-bundle techniques.

[0025] 2. Enhanced Aesthetic Appearance: Gradient length changes and customizable contours mimic natural hair flow.

[0026] 3. Durability and Stability: Elastic fastening members ensure secure fixation and maintain shape during storage / transport.

[0027] 4. Scalability and Design Flexibility: Adjustable parameters (angles, ratios, folding directions) support diverse product designs□BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 is a schematic diagram of a single-bundle of synthetic hair strands with both symmetrical the inclined surfaces of both oblique-cut ends according to the present disclosure.

[0029] FIG. 2 illustrates the single-bundle synthetic hair strands shown in FIG. 1 after combing and stretching at both ends.

[0030] FIG. 3 depicts an assembled synthetic hair assembly with a predominantly linear hemline configuration according to the present disclosure.

[0031] FIG. 4 shows an assembled synthetic hair assembly in FIG. 3 after combing and stretching at the bottom.

[0032] FIG. 5 illustrates an assembled synthetic hair assembly with a concave arc-shaped hemline configuration according to the present disclosure.

[0033] FIG. 6 demonstrates the assembled synthetic hair assembly in FIG. 5 after combing and stretching at the bottom.

[0034] FIG. 7 depicts an assembled synthetic hair assembly with a convex arc-shaped hemline configuration according to the present disclosure.

[0035] FIG. 8 shows the assembled synthetic hair assembly in FIG. 7 after combing and stretching at the bottom.

[0036] FIG. 9 is a schematic diagram of a single-bundle synthetic hair with parallel inclined surfaces of both oblique-cut ends according to the present disclosure.

[0037] FIG. 10 illustrates the assembled synthetic hair assembly in FIG. 9 after combing and stretching at both ends.

[0038] FIG. 11 depicts an assembled synthetic hair assembly with a ponytail-shaped outer contour according to the present disclosure.

[0039] FIG. 12 is a flowchart of the manufacturing method for the assembled synthetic hair assembly according to the present disclosure.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] Referring to FIG. 1 and 2, A specific implementation of the assembled synthetic hair assembly according to the present disclosure includes a bundle of synthetic hair strands (1). Both ends of the bundle are cut into inclined surfaces (1.1, 1.2), where the length direction of the hair strands forms predetermined inclined angles (α, β) with the inclined surfaces. A first fastening band (3) is used to tie the center portion of the synthetic hair bundle. The bundle is then folded at the tied portion to create a predetermined outer contour, forming the assembled synthetic hair assembly.

[0041] To achieve varying outer contours, the bundle may be folded in different directions at the tied portion, as detailed in Embodiment 1 and Embodiment 2 below.

[0042] Referring to FIGS. 1-6, in first embodiment: The bundle of synthetic hair strands preferably comprises 4,000-6,000 synthetic hair strands. Both ends of the bundle are cut into symmetrically arranged included surfaces (1.1 and 1.2), forming a single bundle of synthetic hair strands (1) with symmetrical angled end surfaces. The left surface (1.1) has an inclined angle α, and the right (1.2) has an inclined angle β. Both α and β are equal, greater than 20°, and less than 90°. As shown in FIG. 1, the preferred angle for both surfaces is 40°(i.e., α=β=40°). This ensures that the extended lines of the oblique intersect at the central point of the bundle. Additionally, the angles can be adjusted based on user preferences to create varying visual gradients and layers, enhancing the three-dimensionality and dynamic aesthetics of the braid. Let the shortest hair strands in the bundle be La and the longest be Lb. The ratio satisfies 80%≥(La / Lb)≥50%, preferably La / Lb=3 / 5. This ensures a harmonious overall layered appearance after folding while maintaining rich detail in the outer contour.

[0043] The first fastening band (3) ties the center of the bundle. At the tied portion, the bundle is folded toward the side of the shortest strands (La), forming a assembled synthetic hair assembly. The outer contour resembles a waterfall shape, with the bottom appearing naturally linear hemline (FIG. 3) or concave-arc-shaped hemline (FIG. 5). This structure not only stabilizes the bundle but also provides a unique visual profile, allowing users to customize their style. After tying and folding, the middle and lower ends of the hair strands may be combed to further refine the outer contour into a natural waterfall-like shape (FIGS. 4 and 6).

[0044] As shown in FIGS. 1, 7, and 8, the following is an embodiment 2 of the disclosure of an assembled synthetic hair assembly:

[0045] Each bundle of synthetic hair strands comprises approximately 4,000 to 6,000 individual hair strands. The ends of the bundle are cut into symmetrical left and right-angled end surfaces (1.1 and 1.2), forming a single bundle of synthetic hair strands 1 with symmetrical beveled ends. The left angled end surface 1.1 is at an angle α, and the right 1.2 is at an angle β. α and β are equal, with both angles greater than 20°but less than 90°. Preferably, both angles are 40° (α=β=40°). This design ensures that the extended lines of the beveled ends intersect at the center point of the hair bundle. Additionally, this configuration can create different natural gradients and layers in appearance according to customer requirements, thereby enhancing the three dimensionality and dynamic beauty of the weaving.

[0046] Within each bundle of synthetic hair strands, the shortest hair strands are La, and the longest are Lb, with the ratio La / Lb ranging from 50% to 80%. Preferably, La / Lb is 3 / 5. This ratio ensures that when the hair bundle is folded at its center towards the longest hair strands Lb and secured with a first fastening band 3, the resulting the bundle has an overall cascade-shaped outline. Its bottom can form a convex arc, an inverted teardrop, or a heart-shaped outline, primarily determined by the ratio of the shortest hair length L1 to the longest hair length L2 under a given bevel angle. Moreover, after securing the hair bundle with the first fastening band and folding the hair bundle, the hair ends in the middle and lower parts of the bundle can be combed to make the overall outline of the hair bundle naturally cascading, with the bottom forming a natural convex arc outline.

[0047] Referring to FIGS. 1, 2, and 11, Example 3 of the present disclosure relates to an assembled synthetic hair assembly:

[0048] A preferred embodiment of a bundle of synthetic hair strands comprises 4,000-6,000 synthetic hair strands. The two ends of the hair bundle are cut into symmetrically angled end surfaces (1.1 and 1.2), forming a single synthetic hair bundle 1 with the symmetrically angled surfaces. The tilt angle α of the left beveled end 1.1 and the tilt angle β of the right beveled end 1.2 are equal, and both angles are greater than 20° and less than 90°. Preferably, α=β=40°, as shown in FIG. 1. This configuration ensures that the extensions of the beveled ends intersect along the central axis of the hair bundle, enabling visual customization of natural gradients and layering effects to enhance the three-dimensional and dynamic aesthetic of the hair bundle.

[0049] Within the hair bundle, the shortest hair strands are denoted as La, and the longest as Lb, with the ratio 0.5≤La / Lb≤0.8 (preferably La / Lb=3 / 5). This ratio ensures that the folded hair bundle maintains overall hierarchical harmony while showcasing intricate details in its contour. After cutting the ends, the hair strands are mixed and combed to achieve a predetermined end profile. The strands are further stretched and combed to create a naturally voluminous appearance (as shown in FIG. 2). The hair bundle is then tied with a first fastening band 3 at its center, folded at the tied position, and formed into an assembled hair bundle with a fluffy, natural outer contour. The middle-to-lower section of the outer contour adopts a ponytail-like shape.

[0050] Furthermore, use the second band 4 to tie the entire hair at the neck area of the bundle, forming a loop (alternatively referred to herein as buttonhole) 5 at the head portion of the bundle. The middle and lower sections of its outer contour create a ponytail-like shape (as shown in FIG. 11). This design facilitates the packaging, transportation, and display of the bundle.

[0051] Referring to FIGS. 9, 10, and 11, Embodiment 4 of the assembled synthetic hair assembly bundled by fastening cords in the Present Disclosure:

[0052] Preferably, a bundle of synthetic hair comprises 4,000 to 6,000 predetermined synthetic hair strands. Both ends of the synthetic hair bundle are cut into two parallel angled end surfaces (2.1 and 2.2), forming a single synthetic hair bundle 2 with parallel angled end surfaces (as shown in FIG. 9). Each hair strand in the bundle has substantially the same length, and their centers form sequential, continuous gradient offsets. These parallel angled end surfaces simplify the cutting process, improve operability, and significantly enhance work efficiency. The left surface 2.1 has an inclination angle α, while the right surface 2.2 has an inclination angle β, where α≠β and α+β=180°. Preferably, α is 140, and β is 40°.

[0053] The hair strands are blended and combed to create a predetermined mixed contour at both ends of the synthetic hair bundle. The ends are stretched and combed to form natural tapered tips (as shown in FIG. 10). A first binding cord 3 is used to fasten the central portion of the hair bundle. The bundle is then folded at the position of the first binding cord 3 to form a preconfigured outer contour, which exhibits a natural convex arc shape. Additionally, a second binding cord 4 is used to secure the folded bundle at its neck region, forming an eyelet 5. This results in a bundled synthetic braid with a top contour featuring the eyelet 5 and a bottom contour shaped into a natural convex arc or ponytail-like form (as shown in FIG. 11).

[0054] In Embodiments 3-4 of the synthetic hair bundled by fastening band, the first fastening band 3 and second fastening band 4 may use conventional hair ties or bands, but elastic rubber bands are preferred for ease of fastening and removal. Furthermore, the bundled synthetic hair can be secured to internal hooks within a packaging box via the first fastening band 3, facilitating packaging, transportation, and display.

[0055] Manufacturing method for the first type of an assembled synthetic hair assembly:

[0056] The method comprises the following steps:

[0057] Step 1: Cut both ends of a synthetic hair bundle into inclined surfaces angled relative to its length direction.

[0058] Step 2: Comb and blend the strands to achieve a predetermined outer contour.

[0059] Step 3: Stretch the end portions of the bundle to shape it into a natural end contour. Specifically, heat stretching on a stretching platform is applied to the hair strands, particularly the tips, to attain the desired length and tapered shape. Precise stretching and combing operations enhance the bundle three-dimensionality and realism.

[0060] Step 4: Fasten the central portion of the bundle with the first fastening band 3.

[0061] Step 5: Fold the bundle at the first fastening band 3 to form the assembled synthetic hair assembly.

[0062] In particular, in step 3 mentioned above, the hair strands on the extension platform are heated and stretched, especially at the ends of the strands, to achieve the desired length of the synthetic hair bundle and to form a predetermined hair tip shape. The bundle is styled into a predetermined natural outline through precise stretching and combing, enhancing its three—dimensional and realistic appearance.

[0063] Embodiment 1 of the manufacturing method for the first type of an assembled synthetic hair assembly in the present Disclosure (Refer to FIGS. 1-6):

[0064] A prepared bundle of synthetic hair comprises 4,000 to 6,000 predetermined synthetic hair strands. The manufacturing method includes the following steps:

[0065] Step 1: Cut both ends of the synthetic hair bundle into two symmetrical angled end surfaces (1.1 and 1.2), forming a single synthetic hair bundle 1 with symmetrical oblique surfaces. The left oblique surface 1.1 has an inclination angle α, and the right oblique surface 1.2 has an inclination angle β, where α and β are equal. Both inclination angles are greater than 20° and less than 90°. The shortest hair strand in the bundle is denoted as La, and the longest as Lb, with the ratio La / Lb satisfying 50%≤La / Lb≤80%.

[0066] Step 2: Comb and blend the hair strands to achieve a predetermined outer contour. Preferably, the strands are combed and mixed on a blending platform to ensure uniform distribution, laying the foundation for subsequent steps.

[0067] Step 3: Stretch the end portions of the synthetic hair bundle to shape it into a natural end contour. Preferably, stretching and combing are performed on a stretching platform to refine the mid and tip sections of the bundle.

[0068] Step 4: Secure the central portion of the hair bundle with a first fastening band 3. Preferably, an elastic rubber band is used as the first fastening band 3, allowing adjustable tension to ensure stability while avoiding deformation caused by excessive tightness.

[0069] Step 5: Fold the synthetic hair bundle toward the side of the shortest strands (La) at the position of the first binding cord 3, forming a bundled synthetic braid with an overall waterfall-like outer contour. The bottom edge is either relatively straight or shaped into a concave arc.

[0070] Embodiment 2 of the manufacturing method for the first type of an assembled synthetic hair assembly in the present disclosure (Refer to FIGS. 1, 7, and 8).

[0071] A prepared bundle of synthetic hair strands comprises 4,000 to 6,000 predetermined synthetic hair strands. The manufacturing method includes the following steps:

[0072] Step 1: Cut both ends of the synthetic hair bundle into two symmetrically arranged inclined surfaces (1.1 and 1.2), forming a single synthetic hair bundle 1 with symmetrical oblique surfaces. The left oblique surface 1.1 has an inclination angle α, and the right oblique surface 1.2 has an inclination angle β, where α and β are equal. Both inclination angles are greater than 20° and less than 90°. The shortest hair strand in the bundle is denoted as La, and the longest as Lb, with the ratio La / Lb satisfying 50%≤La / Lb≤80%.

[0073] Step 2: Comb and blend the hair strands to achieve a predetermined outer contour. Preferably, the strands are combed and mixed on a blending platform to ensure uniform distribution, laying the foundation for subsequent steps.

[0074] Step 3: Stretch the end portions of the synthetic hair bundle to shape it into a natural end contour. Preferably, stretching and combing are performed on a stretching platform to refine the mid and tip sections of the bundle.

[0075] Step 4: Secure the central portion of the hair bundle with a first binding cord 3. Preferably, an elastic rubber band is used as the first binding cord 3, allowing adjustable tension to ensure stability while avoiding deformation caused by excessive tightness.

[0076] Step 5: Fold the synthetic hair bundle toward the side of the longest strands (Lb) at the position of the first binding cord 3, forming a bundled synthetic braid with an overall waterfall-like outer contour. The bottom edge is shaped into a convex arc, inverted teardrop, or heart-shaped profile.

[0077] Embodiment 3 of the manufacturing method for the first type of an assembled synthetic hair assembly in the present disclosure (Refer to FIGS. 9, 10, and 11).

[0078] A prepared bundle of synthetic hair comprises 4,000 to 6,000 predetermined synthetic hair strands. The manufacturing method includes the following steps:

[0079] Step 1: Cut both ends of the synthetic hair bundle into two parallel oblique-cut surfaces (2.1 and 2.2), forming an assembled synthetic hair assembly 2 with parallel oblique-cut surfaces (as shown in FIG. 9). The left oblique-cut surface 2.1 has an inclination angle α, and the right oblique-cut surface 2.2 has an inclination angle β, where α≠β and α+β=180°. Preferably, α is 140°, and β is 40°.

[0080] Step 2: Blend and comb the hair strands to create a predetermined mixed contour at both ends of the synthetic hair bundle.

[0081] Step 3: Stretch and comb the ends of the hair bundle to form natural tapered tips, with the outer contour exhibiting a natural convex arc shape.

[0082] Step 4: Secure the central portion of the hair bundle with a first binding cord 3. Fold the bundle at the position of the first binding cord 3 to form a preconfigured outer contour, which appears as a natural convex arc.

[0083] Step 5: Fasten the folded bundle at its neck region with a second binding cord 4, forming an eyelet 5. This results in assembly with a top contour featuring the eyelet 5 and a bottom contour shaped into a natural convex arc.

[0084] Embodiment 4 of the manufacturing method for the first type of an assembled synthetic hair assembly in the present disclosure (Refer to FIGS. 1, 2, and 11).

[0085] A prepared bundle of synthetic hair comprises 4,000 to 6,000 predetermined synthetic hair strands. The manufacturing method includes the following steps:

[0086] Step 1: Cut both ends of the synthetic hair bundle into two symmetrically arranged oblique-cut surfaces (1.1 and 1.2), forming a single synthetic hair bundle 1 with symmetrical oblique-cut surfaces. The left oblique-cut surface 1.1 has an inclination angle α, and the right 1.2 has an inclination angle β, where α and β are equal. Both inclination angles are greater than 20° and less than 90°. The shortest hair strand in the bundle is denoted as La, and the longest as Lb, with the ratio La / Lb satisfying 50%≤La / Lb≤80%.

[0087] Step 2: Blend and comb the bundle to achieve a predetermined mixed contour at its ends.

[0088] Step 3: Further stretch and comb the hair strands on both sides of the bundle to create a fluffy, natural appearance in the strands and their tips.

[0089] Step 4: Secure the central portion of the hair bundle with a first fastening band 3. Fold the bundle toward the side of the longest strands (Lb) at the tied position, forming an assembled synthetic hair assembly with a full, naturally voluminous outer contour.

[0090] Step 5: Fasten the entire hair bundle at the neck region with a second binding cord 4, forming an eyelet 5 at the top. The mid-to-lower portion of the outer contour is shaped into a ponytail-like form (as shown in FIG. 11).

[0091] Detailed explanation of the manufacturing method steps in the present disclosure (Refer to FIG. 12):

[0092] Oblique Cutting (S1): The synthetic hair bundle, comprising 4,000-6,000 strands, is obliquely cut at both ends. The oblique-cut surfaces form specific inclination angles relative to the length direction of the bundle. The angles α and β at the two ends are set to 40° each (as shown in FIG. 1), or alternatively, α is 140° at one end and β is 40° at the opposing end (as shown in FIG. 9). This ensures uniform strand lengths, parallel oblique surfaces, and a continuous gradient in strand protrusion lengths. When α and β are both 40°, the shortest strand (La) and longest strand (Lb) in the bundle preferably satisfy the ratio La / Lb=3 / 5 to ensure layered aesthetics and natural appearance in the bundle.

[0093] Blending (S2): The strands are combed and blended on a blending platform to achieve a predetermined end contour. This step ensures uniform strand distribution, laying the foundation for subsequent processes.

[0094] Stretching (S3): The mid and end portions of the bundle are further stretched and combed on a stretching platform to shape it into a natural, voluminous outer contour. Preferably, heat stretching is applied on an extension platform, particularly to the tips of the strands, to achieve the desired length and tapered shape. Precise stretching and combing enhance the bundle's three-dimensionality and realism.

[0095] Binding (S4): A first fastening band 3 (preferably an elastic rubber band) is used to tie the central portion of the hair bundle. The elasticity allows adjustable tension to ensure stability while preventing deformation from over-tightening.

[0096] Folding (S5): The bundle is folded evenly at the tied position to form the bundled synthetic hair strands. Uniform folding force ensures symmetry and aesthetic integrity in the final shape.

[0097] Secondary Binding (S6): A second fastening band 4 is applied at the head-neck region of the folded bundle to create an eyelet 5, resulting in a bundled synthetic hair with a functional eyelet at the top. This design simplifies packaging and enables specific display configurations.

[0098] Final Combing (S7): The bundle's bottom portion is gently stretched to form natural, tapered tips.

[0099] Although the embodiments of the present disclosure have been shown and described, those skilled in the art may understand that many changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present disclosure, and the scope of the present disclosure is defined by the appended claims and their equivalents.

Claims

1. A preassembled synthetic hair assembly comprising:a bundle of synthetic hair strands having both oblique-cut ends, the surfaces of which are inclined at predetermined angles (α and β) relative to the length direction of the strands;a first fastening member for securing the bundle at a central region; anda folded configuration formed by doubling the bundle at the secured region to create a predetermined outer contour.

2. The assembly of claim 1, wherein:the surfaces of both oblique-cut ends are symmetrically arranged with the predetermined angles, which are equal and satisfy 20°<α=β<90°;the ratio of shortest (La) to longest (Lb) strand lengths of the bundle satisfies 50%≤La / Lb≤80%; andthe bundle is folded toward the shortest strand side (La) to form the predetermined outer contour, which is of a cascading contour with a predominantly linear or concave arcuate hemline configuration.

3. The assembly of claim 1, wherein:the surfaces of both oblique-cut ends are symmetrically arranged with the predetermined angles, which are equal and satisfy 20°<α=β<90°;the ratio of shortest (La) to longest (Lb) strand lengths satisfies 50%≤La / Lb≤80%; andthe bundle is folded toward the longest strand side (Lb) to create the predetermined outer contour with convex arcuate hemline configuration, inverted teardrop, or Sweetheart shape.

4. The assembly of claim 1, wherein the strands are combed at middle and lower regions to enhance a three-dimensional undulating configuration.

5. The assembly of claim 3, further comprising:blended and combed strand ends;stretched strand ends for fluffy appearance; anda ponytail-like contour in the middle-lower region after folding.

6. The assembly of claim 5, further comprising:a second fastening member securing the folded bundle's neck region; anda buttonhole-like structure at the head portion with a ponytail-like lower contour.

7. The assembly of claim 1, wherein:the surfaces of both oblique-cut ends are parallel with α≠β and α+β=180°. blended and combed strands form a mixed contour; andstretched ends create the pre-determined outer contour, which is of a contour of density gradient changes with arc-shaped convex hemline configuration.

8. The assembly of claim 7, further comprising a second fastening member securing the neck region to form a buttonhole-like head structure with arc-shaped convex hemline configuration.

9. The assembly of claim 6, wherein:the fastening members are elastic bands; andthe assembly is attachable to a packaging hook via the first fastening member.

10. The assembly of claim 8, wherein:the fastening members are elastic bands; andthe assembly is attachable to a packaging hook via the first fastening member.

11. A method for manufacturing a preassembled synthetic hair assembly, comprising:obliquely cutting both ends of a synthetic hair bundle to form inclined surfaces;combing strands to establish a pre-determined outer contour;shaping strand ends through stretching;securing a central region with a first fastening member; andfolding the bundle at the secured region to form the assembly.

12. The method of claim 11, wherein end shaping includes thermal stretching to achieve predetermined length and tip configuration.

13. The method of claims 11, further comprising securing a second fastening member at the folded bundle's neck region to create a buttonhole-like structure.

14. The method of claim 13, wherein:the inclined surfaces are symmetrically cut with α=β (20°<α, β<90°) and 50%≤La / Lb≤80%; andfolding occurs toward the shortest strand side (La) to form a cascading contour with a predominantly linear or concave arcuate hemline configuration.

15. The method of claim 13, wherein:the inclined surfaces are symmetrically cut with 20°<α=β<90°) and 50%≤La / Lb ≤80%; andfolding occurs toward the longest strand side (Lb) to create a contour with convex arcuate hemline configuration, inverted teardrop, or sweetheart shape.

16. The method of claim 13, wherein:the inclined surfaces are parallel with α≠β and α+β=180°;strands are blended / combed for mixed contour; andends are stretched to form a contour of density gradient changes with arc-shaped convex hemline configuration.

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