Thread for lifting theraphy and device for manufacturing the same

Abstract

A thread for a lifting procedure according to one embodiment of the present invention includes a plurality of recessed bonding portions formed on a biodegradable yarn (1). The plurality of recessed bonding portions are formed rotatably around the biodegradable yarn (1). Each of the recessed bonding portions includes a flat bottom surface (2), an inclined surface (3) extending at a gentle angle from one side of the flat bottom surface (2), and a barbed portion (4) extending from the other side of the flat bottom surface. The barbed portion (4) is oriented toward the inside of the recessed bonding portion, and its tip (5) does not protrude outwardly in the direction opposite to the yarn (1). The yarn (1) is not twisted. The rotational angle interval between adjacent recessed bonding portions is less than 180 degrees.

Description

Technology Field

[0001] The present invention relates to a thread for lifting procedures and an apparatus for manufacturing the same. Background Technology

[0002] In response to the innate human desire for youthful and healthy-looking skin, various wrinkle removal procedures have been developed, including facelifts, filler injections, botulinum toxin injections, and laser skin regeneration. Recently, lifting procedures have emerged that remove wrinkles by pulling skin tissue through the insertion of specially designed threads subcutaneously without skin incision.

[0003] FIG. 1 illustrates a type of thread used in such a lifting procedure. The thread for the lifting procedure shown in FIG. 1 is disclosed in the publication of Korean Registered Patent No. 10-2107331 (Title of Invention: Mold for Manufacturing a Suture for Lifting Wrinkled Skin and Suture for Lifting Wrinkled Skin Manufactured by the Mold, Applicant: Lee Kyu-sun). The thread for the lifting procedure (200) shown in FIG. 1 is provided with a first binding portion (210) and a second binding portion (220) formed as intaglio by carving out a specific shape from a yarn body (201). These first and second binding portions (210, 220) are formed facing each other at a certain distance. The aforementioned Korean registered patent publication also discloses a manufacturing process for producing a lifting thread with the structure shown in FIG. 1. The manufacturing process of the lifting thread disclosed in the aforementioned Korean registered patent publication is clearly understood by referring to FIG. 2. In FIG. 2, the components indicated by reference numerals 110, 120, and 130 constitute the lower mold. The components indicated by reference numerals 140 and 150 constitute the upper mold. As the yarn (101) is pulled in one direction and passes through a passage formed in the lower mold at a constant speed, the upper mold moves up and down in a constant cycle toward the lower mold. When the upper mold moves downward toward the lower mold, the first forming blade (140) and the second forming blade (150) of the upper mold strike the yarn, cutting off a portion of the yarn in the shape of the forming blades, thereby forming the first and second binding parts (210, 220) shown in FIG. 1. Since the first and second forming blades (140, 150) are formed facing each other, the first and second binding parts (210, 220), which are formed as intaglio on the yarn, are formed facing each other at a constant distance.

[0004] As another prior art, we introduce the technology disclosed in Korean Registered Patent No. 10-1057377 (Title of Invention: Medical suture having micro-protrusions on the surface and method of manufacturing the same; Applicant: Hans Biomed Co., Ltd.). Unlike the prior art described above, the technology in this registered patent provides a binding portion in the form of raised thorns, as illustrated in FIG. 3. This raised binding portion is formed by inserting a yarn into an overflow mold and then heating and pressurizing it. In this registered patent technology, after manufacturing a whole body in which a raised binding portion is formed on one side of the yarn in this manner, rotational force is applied to this whole body under heating conditions, and a cooling process is subsequently performed to maintain the twisted state of the whole body. In the whole body that has undergone this heating, rotation, and cooling process, the raised binding portions are arranged while rotating around the circumference of the yarn.

[0005] In the process of arriving at the present invention, the inventor(s) referred to the two prior art described above and identified their disadvantages as follows.

[0006] First, it was identified that the first prior art (the technology of Korean Registered Patent No. 10-2107331) has a disadvantage in that the binding performance of the binding portion is poor during a lifting procedure. The binding portion formed on the yarn binds to the skin tissue upon subcutaneous insertion during a lifting procedure and performs an anchor function to withstand the tensile force applied by the operator. However, in the first prior art, since the binding portion is formed only on both sides of the yarn, there may be cases where the skin tissue is not properly pulled when tensile force is applied by the operator.

[0007] Second, the technology disclosed in the second prior art (Korean Registered Patent No. 10-1057377) has disadvantages derived from its unique manufacturing process. As described above, the second prior art requires a separate process to maintain a twisted state by applying rotational force to the body under heating conditions and then cooling it after manufacturing a body in which positively shaped barbs are formed in one direction of the yarn. If the manufacturing process is carried out in this double step, not only is the manufacturing process itself complex, but contamination problems may also occur, such as damage to the positively shaped barbs (bonding parts) formed on the body or the adhesion of foreign substances to the body, during the process of moving the body to the heating, rotating, and cooling processes after manufacturing is complete. In addition, during the process of heating and twisting the entire body so that the bifurcated barbs are arranged while rotating around the circumference of the yarn, it is difficult to transmit the twisting force, or torque, consistently depending on the position along the length of the entire body, which causes a problem in that the bifurcated barb-shaped fasteners are arranged while rotating at uniform angular intervals (for example, at a specific location, the fasteners are arranged at 120-degree intervals, but at other locations, they are arranged at smaller or larger angular intervals). Furthermore, during the twisting process, a phenomenon may occur where the barbs bend uniformly in only a specific direction while rotating around the circumference of the yarn, which causes a problem of reduced fastening strength to the skin tissue. Moreover, it was found that the second prior art has a structural disadvantage in that the bifurcated barb-shaped fasteners cause pain to the patient during the procedure.

[0008] The inventor(s) devoted themselves to devising a thread for lifting procedures that simultaneously resolves the disadvantages of the aforementioned prior art, and as a result, arrived at the present invention. The problem to be solved

[0009] The present invention aims to provide a thread for lifting procedures in which the bonding force to skin tissue is improved by the intaglio bonding portions, which are arranged closely at an angle interval of less than 180 degrees while rotating around the circumference of the yarn.

[0010] In addition, the present invention aims to provide a thread for lifting procedures in which an intaglio binding portion is formed rotatably around the circumference of the yarn without twisting the yarn, thereby precisely forming the angular spacing between each intaglio binding portion at a controlled angle, and maintaining the shape of the intaglio binding portion in its originally intended shape without deformation.

[0011] In addition, the present invention aims to provide a lifting thread that does not cause pain to the patient during the procedure because the barbed portion of the intaglio binding part does not protrude outwardly in the semi-directional direction of the yarn. means of solving the problem

[0012] A thread for a lifting procedure according to one embodiment of the present invention includes a plurality of recessed bonding portions formed on a biodegradable yarn (1). The plurality of recessed bonding portions are formed rotatably around the biodegradable yarn (1). Each of the recessed bonding portions includes a flat bottom surface (2), an inclined surface (3) extending at a gentle angle from one side of the flat bottom surface (2), and a barbed portion (4) extending from the other side of the flat bottom surface. The barbed portion (4) is oriented toward the inside of the recessed bonding portion, and its tip (5) does not protrude outwardly in the direction opposite to the yarn (1). The yarn (1) is not twisted. The rotational angle interval between adjacent recessed bonding portions is less than 180 degrees.

[0013] It is preferable that the length (d) protruding inwardly into the intaglio bonding portion of the above-mentioned portion (4) is 70% to 150% of the vertical distance (h) from the flat bottom surface (2) to the surface of the yarn (1).

[0014] In addition, additional components may be further included in the thread for lifting procedures according to the present invention. Effects of the invention

[0015] According to the present invention, a lifting thread can be provided in which the intaglio binding portions are arranged closely at an angle interval of less than 180 degrees while rotating around the circumference of the yarn, thereby improving the binding force to the skin tissue by the intaglio binding portions.

[0016] In addition, according to the present invention, a lifting thread is provided in which an intaglio binding portion is formed rotatably around the circumference of the yarn without twisting the yarn, so that the angular spacing between each intaglio binding portion is accurately formed at a controlled angle, and the shape of the intaglio binding portion can be maintained in its originally intended shape without deformation.

[0017] In addition, according to the present invention, a lifting thread can be provided in which the barbed portion of the intaglio binding part does not protrude outwardly in the semi-directional direction of the yarn, thereby not causing pain to the patient during the procedure. Brief explanation of the drawing

[0018] FIG. 1 is a drawing illustrating a thread structure for a lifting procedure according to the prior art. FIG. 2 is a drawing for explaining the process of manufacturing a thread for a lifting procedure according to the prior art. FIG. 3 is a drawing illustrating the structure of a thread for a lifting procedure according to another prior art. Figure 4 is an actual product photograph of a thread for lifting procedures according to one embodiment of the present invention. FIG. 5 is a conceptual cross-sectional view of a thread for a lifting procedure according to one embodiment of the present invention. FIG. 6 is an enlarged view of one of the plurality of recessed attachment parts of a lifting thread according to one embodiment of the present invention. FIG. 7 is a diagram functionally illustrating each component of equipment for manufacturing a lifting procedure thread according to one embodiment of the present invention. FIG. 8 is a drawing illustrating the manufacturing steps of a thread for a lifting procedure according to one embodiment of the present invention. Specific details for implementing the invention

[0019] The embodiments described below are illustrative for the purpose of explaining the technical concept of the present disclosure, and the scope of the rights of the present disclosure is not limited to the embodiments presented below or the specific descriptions thereof.

[0020] All technical and scientific terms used in this specification have the meaning generally understood by those skilled in the art to which this disclosure pertains, unless otherwise defined, and all terms used in this specification are selected for the purpose of further clarifying this disclosure and are not selected to limit the scope of the rights of this disclosure.

[0021] Expressions used in this specification, such as “comprising,” “comprising,” “having,” etc., should be understood as open-ended terms implying the possibility of including other embodiments unless otherwise stated in the phrase or sentence containing such expressions.

[0022] Hereinafter, preferred embodiments of the present disclosure are described in detail with reference to the attached drawings so that those skilled in the art can easily practice them. In the attached drawings, identical or corresponding components are indicated by identical reference numerals, and in the description of the embodiments below, identical or corresponding components may be omitted from being described redundantly. However, even if a description of a specific component is omitted in the description below, this is not intended to imply that such component is not included in the corresponding embodiment.

[0024] Figure 4 is an actual product photograph of a thread for lifting procedures according to one embodiment of the present invention.

[0025] In the actual product of the lifting thread (shown in FIG. 4) test-produced by the inventor(s) according to the manufacturing process unique to the present invention, a plurality of negative bonding portions are formed on a biodegradable yarn made of polydioxanone (PDO). Although a biodegradable yarn made of polydioxanone was used in the embodiment of FIG. 4, the scope of the present invention is not limited to the use of a yarn of a specific material. Materials suitable for use in biodegradable yarns include polydioxanone (PDO), hyaluronic acid (HA), poly-L-lactic acid (PLLA), polyglycolic acid (PGA), polycaprolactone (PCL), polylactic-glycolic acid (PLGA or PGLA), which is a copolymer of glycolide and lactic acid, poly-L-lactide-co-caprolactone (PLCL), which is a copolymer of polylactic acid and caprolactone, polyglycolid-co-caprolactone (PGCL), which is a copolymer of glycolide and caprolactone, and poly-L-lactide-co-trimethylene carbonate (PLTMC). It may be selected from a group composed of carbonates.

[0026] The main feature of the thread for lifting procedures according to one embodiment of the present invention, as can be seen from FIG. 4, is that in addition to the fact that all binding portions are formed in an intaglio shape, these intaglio binding portions are arranged at a pre-controlled angular interval of less than 180 degrees while rotating around the circumference of the yarn. In the prior art identified from FIG. 1 and FIG. 2, intaglio binding portions are formed on both sides of the yarn, so the angular interval between the intaglio binding portions is 180 degrees. In contrast, in the present invention, since the angular interval between the intaglio binding portions is formed at a controlled angular interval of less than 180 degrees, it becomes possible to arrange the intaglio binding portions at a more dense interval along the circumference of the yarn, and this configuration of the present invention acts to further improve the binding force to the skin tissue when the thread for lifting procedures according to one embodiment of the present invention is inserted subcutaneously.

[0027] The conceptual drawing of FIG. 5 illustrates a cross-sectional view of intaglio bonding portions formed on a yarn at angular intervals of less than 180 degrees. FIG. 5 illustrates the bonding portions being formed sequentially at 120-degree intervals. In FIG. 5, the bonding portions are depicted with dotted lines, taking into account that the bonding portions are not formed on the same plane but are spaced apart at regular intervals. Although FIG. 5 illustrates a uniform angular interval of 120 degrees, the scope of the present invention is not limited thereto, and the angular interval can be changed to any other value.

[0028] FIG. 6 is an enlarged view of one of the plurality of recessed attachment parts of a lifting thread according to one embodiment of the present invention.

[0029] Referring to FIG. 6, in a lifting procedure thread according to one embodiment of the present invention, each engraved binding portion comprises a flat bottom surface (2), an inclined surface (3) extending at a slight angle from one side of the flat bottom surface (2), and a barbed portion (4) formed extending from the other side of the flat bottom surface (2). The barbed portion (4) is oriented toward the inside of the engraved binding portion, and its tip portion (5) does not protrude radially outward from the yarn (1). The characteristic of the lifting procedure thread according to one embodiment of the present invention, in which the tip portion (5) does not protrude radially outward from the yarn (1) but is oriented solely toward the inside of the engraved binding portion, is advantageous in that it does not cause pain to the patient, i.e., the subject of the procedure, when inserted subcutaneously. When a practitioner performs a procedure to pull the thread after subcutaneous insertion, if the barbed portion (4) has a structure that protrudes radially outward from the thread (1) and performs an anchor function by being embedded in the skin tissue and pulling the skin without slipping despite the practitioner's pulling motion, it may irritate the skin during the subcutaneous insertion process of the lifting thread, which may lead to pain in the patient.

[0030] In a lifting procedure thread according to one embodiment of the present invention, the tip portion (5) of the barbed portion (4) can be bent outward in the radial direction of the thread (1) while embedded in the skin tissue when a pulling motion is performed by the practitioner, and at this time, the restoring force of the barbed portion (4) can be applied inward in the radial direction. Therefore, the bond with the skin tissue is not easily released, and the anchor function of pulling the skin in conjunction with the practitioner's pulling motion can be performed more smoothly.

[0031] In terms of the aforementioned restoring force, setting the protruding length (d) of the intaglio binding portion of the above-mentioned barb (4) inward is meaningful. When the operator performs a thread pulling motion, the resistance to the force causing the barb (4) to bend outward in the radial direction of the yarn (1) is greater the shorter the length (d). In other words, if the length (d) is long, when the operator performs a lifting procedure thread pulling motion, the barb (4) can easily bend outward in the radial direction of the yarn (1), and if the length (d) is short, when the same motion is performed, the barb (4) does not easily bend outward in the radial direction of the yarn (1) and can exert a greater resistance to bending. That is, the binding force to the skin tissue can be strongly exerted. However, if the length (d) is too short, there is a problem that the barb (4) cannot easily penetrate into the skin tissue.

[0032] The inventors tested the skin adhesion strength by manufacturing various lengths (d) protruding inwardly into the intaglio bonding portion of the above-mentioned portion (4), and as a result, confirmed that when this length (d) is in the range of at least 50 to 200% of the vertical distance (h) from the flat bottom surface (2) to the surface of the yarn (1), more preferably in the range of 70% to 150%, it can penetrate well into the skin tissue, while not easily slipping when pulled by a practitioner and can perform an anchor function well by applying resistance to bending outward in the radial direction of the yarn (1).

[0033] Another important feature of the lifting thread according to one embodiment of the present invention is that the yarn (1) is not twisted, and the recessed binding portions are formed by rotation around the yarn (1). Whether or not twisting has been performed on the yarn (1) can be confirmed from the shape of the grain on the surface of the yarn (1). When twisting is performed on the yarn (1) during the process of forming the recessed binding portions by rotation around the yarn (1), the original grain of the yarn (1) appears in a spirally twisted form on the surface of the yarn (1), and when twisting is not performed as in the present invention, the original grain of the yarn (1) appears as is. No spiral twisted grain appears on the surface of the yarn (1) of the lifting thread in Fig. 4, which is an actual product photograph according to one embodiment of the present invention. A method of forming the recessed binding portions by rotation around the yarn (1) without twisting the yarn (1) in the present invention will be described later.

[0034] The main feature of the thread for lifting procedures according to one embodiment of the present invention, namely the feature that the yarn (1) does not twist, results in the effect that the controlled angular spacing between the intaglio binding portions can be accurately maintained as intended. Furthermore, in order to form the binding portions around the yarn as in the prior art, a twisting process must be performed while applying heat after the binding portions are formed on one or both sides of the yarn, and then cooled to maintain this state; however, the shape of the binding portions may become distorted during the process of twisting while applying heat. In contrast, the present invention achieves the effect of preventing such phenomena in advance. In the prior art, due to the process described above, the barbed portions of the binding portions may twist and protrude radially outward from the yarn. The protrusion of the barbed portions radially outward from the yarn can cause the aforementioned problems, such as pain during the procedure.

[0035] In addition, as in the prior art, during the twisting process to form the binding portion around the yarn, the binding portion formed before twisting is twisted (or rotated) in only one direction. Since twisting is performed in only one direction, either clockwise or counterclockwise, based on the cross-section of the yarn, the binding portion structure formed before twisting is also subjected to rotational influence biased in only one direction. For example, this can result in all the barbs of the intaglio binding portion bending in one direction. If all the barbs of the intaglio binding portion formed around the yarn bend in only one direction, a problem arises in that the barbs embedded in the skin tissue can easily come out when a rotational force (torque) in the opposite direction is applied to the lifting thread during the procedure. If the barbs of the intaglio binding portion were bent in various directions, a significant number of barbs would remain embedded in the skin tissue even if a rotational force in one direction was applied; however, the uniform bending of the barbs makes them very vulnerable to rotational forces applied in specific directions that may occur during the procedure. In the thread for lifting procedures according to one embodiment of the present invention, since there is no twisting of the yarn (1), the possibility of problems occurring in the aforementioned prior art is eliminated from the outset, and the shape of the originally intended negative bonding portion is accurately maintained. This should be understood as one of the important features of the present invention.

[0036] FIG. 7 is a diagram functionally illustrating each component of equipment for manufacturing a lifting procedure thread according to one embodiment of the present invention.

[0037] In FIG. 7, the positions of each component represent the relative positions between each component in the actual equipment. The entire equipment for manufacturing lifting threads may include the components described below, as illustrated in FIG. 7.

[0038] First, the winding unit (10) is a functional unit that winds the yarn of a lifting procedure thread. A roll of yarn wound on which the yarn supplied to the manufacturing process is wound is placed on the winding unit (10), and in this state, the yarn is unwound from the yarn roll and supplied to the manufacturing line.

[0039] The first and second holding parts (20, 70) perform the function of holding the yarn unwound from the winding part (10). The function of holding the yarn, that is, the function of holding the yarn so that its movement is suppressed, can be implemented by a piston equipped with a friction end made of a material such as silicone rubber that can transmit a large frictional force when in pressurized contact with the yarn at the end, for example. When control is implemented to suppress the movement of the yarn, the operation of the piston moving toward the yarn and pressing the yarn against a specific surface with the friction end can be performed simultaneously by the first and second holding parts (20, 70), thereby ensuring that the movement of the yarn is reliably suppressed.

[0040] The tension application unit (30) performs the function of applying force to the yarn held by the first and second holding units (20, 70) in the manner described above to stretch it in a specific direction (e.g., downward). When the tension application unit (30) operates, tension is applied to the yarn supplied from the winding unit (10) and held, i.e., its movement is suppressed, by the first and second holding units (20, 70), and the yarn becomes taut.

[0041] The first and second rotating parts (40, 60) perform the function of rotating the taut yarn at a specific angle. The rotation of the yarn by the first and second rotating parts (40, 60) proceeds intermittently. That is, the operation of rotation occurs -> interruption -> rotation at the same angle occurs -> interruption is repeated. As will be described later, during the interruption of rotation operation between rotations, the formation of a binding part by the forming part (50) occurs. The first and second rotating parts (40, 60) rotate simultaneously at the same angle with the forming part (50) in between to prevent the yarn from twisting.

[0042] The forming section (50) is a functional section that performs forming of a binding section on a yarn inserted into the yarn movement passage of a lower mold while rotation by the first and second rotating sections (40, 60) is interrupted. An upper mold is installed on the upper part of the lower mold in a state where it can move up and down, and a forming blade provided corresponding to the shape of the binding section to be formed is mounted on the upper mold. When the upper mold moves downward to the lower mold with the yarn inserted, the forming blade of the upper mold cuts a specific part of the yarn to form an intaglio binding section. The principle of forming a binding section in the forming section (50) by the upper and lower molds is the same as that in the prior art illustrated in FIG. 2. However, a characteristic feature of the present invention is that the forming section (50), that is, the functional assembly including the upper and lower molds, slides along the longitudinal direction of the yarn. This sliding operation is necessary because the forming of the yarn is performed while movement is suppressed by the first and second holding sections (20, 70) as described above. A molding part (50), which is capable of controlled left and right sliding movement within a specific settable length range, forms a bonding part on a specific portion of the yarn that is taut by the tension application part (30) and whose movement is suppressed by the first and second holding parts (20, 70) while in a stationary state. Subsequently, the first and second rotating parts (40, 60) described above perform rotation of the yarn, and while this rotation is stopped, the molding part (50) performs a controlled sliding operation to move to the next position and forms a bonding part by the downward movement of the upper mold. Following this operation, the first and second rotating parts (40, 60) perform rotation of the yarn, and while the rotation is stopped, form a bonding part at the next position. This repeated operation of molding -> rotation -> rotation stop -> molding after sliding movement -> rotation -> rotation stop -> molding after sliding movement is carried out while rotating around the yarn over the length required for a single product until the formation of an intaglio-shaped bonding part is completed.

[0043] The inspection unit (80) is a functional unit that inspects whether the bonding portion formed on the yarn by the molding unit (50) has been properly molded. An optical inspection method may be used. Optical inspection can be performed by installing a camera, etc., that continuously magnifies and photographs a specific area through which the yarn with the bonding portion formed passes while illuminating it with light. However, the scope of the present invention is not limited to such a specific inspection method. If the molding pattern of the bonding portion is determined to be defective based on the real-time inspection results by the inspection unit (80), the manufacturing process is stopped, and the problematic functional units are identified and adjusted, after which the manufacturing process can be resumed.

[0044] The feeding unit (90) is a functional unit that finally winds and retrieves the yarn that has been fed into the manufacturing process from the winding unit (10) and has a binding part formed by the forming unit (50). The feeding unit (90) can be provided, for example, in the form of a rotating roller. The yarn that has been formed can be wound onto the rotating roller of the feeding unit (90). The feeding unit (90) does not rotate constantly to retrieve the yarn. When the movement of the yarn is suppressed by the first and second holding units (20, 70) and the binding part processing for a specific length (the length of the binding part intended to be formed on a single lifting yarn product) is completed by the above-described forming unit (50) and the first and second rotating units (40, 60), and the first and second holding units (20, 70) release the movement restriction on the yarn, the feeding unit (90) winds the rotating roller to retrieve the yarn that has been processed for a preset length. When the operation of the feeding unit (90) is completed, one cycle of yarn processing is completed, and thereafter, the next cycle proceeds with the operation of the first and second holding units (20, 70) -> the operation of the tension application unit (30) -> the formation of the binding unit by the operation of the forming unit (50) and the first and second rotating units (40, 60). When the next cycle is completed, the first and second holding units (20, 70) release the movement restriction on the yarn again, and the feeding unit (90) repeats the yarn retrieval operation of a preset length.

[0045] FIG. 8 is a drawing illustrating the manufacturing steps of a thread for a lifting procedure according to one embodiment of the present invention.

[0046] In the first step, a holding step is performed to suppress the lateral movement of the supplied yarn by holding it from both sides. The holding step can be performed by causing a friction end mounted on the end of the piston to press the yarn.

[0047] In the second step, a tension application step is performed in which tension is applied to the yarn held inside the two holding points to pull it taut. The tension application step can be performed by a roller mounted on the end of the piston pressing the yarn while the holding on both sides is completed and the lateral movement of the yarn is suppressed.

[0048] In the third step, a forming step is performed in which a specific shape of an intaglio bonding part is formed on a tightly pulled yarn using a forming blade of a forming part that can slide laterally. At this time, the forming part may include a lower mold mounted on a sliding base plate and an upper mold that moves up and down in a position aligned with the lower mold. A passage for the yarn is formed in the lower mold, and when the upper mold moves downward, the forming blade of the upper mold strikes one side of the yarn inserted into the yarn passage of the lower mold, thereby forming an intaglio bonding part.

[0049] In the fourth step, a rotation step is performed in which the yarn is rotated at a predetermined angle. The rotation step can be performed by applying rotational power to a rotating wheel through which the yarn passes. The rotating wheel is provided with a fixing part that fixes or releases the yarn to the rotating wheel, and the rotation step can be performed while the fixing part fixes the yarn to the rotating wheel. The rotation step can be performed by simultaneously applying rotational force to the yarn at two points inside the two holding points.

[0050] The above third and fourth steps are repeated multiple times until the molding of the intaglio bonding part for a single seal product is completed, and during this repetition process, the molding part may repeat lateral movement and stopping of a predetermined distance.

[0051] In the fifth step, a feeding step is performed to release the holding on the yarn and retrieve the molded yarn.

[0052] In the sixth stage, the productization stage is carried out for the recovered yarn. In the final productization stage, the yarn with the molding of the intaglio binding part completed is cut into product units, undergoes a sterilization process, and can then be packaged.

[0053] As confirmed by the photograph in FIG. 4, the lifting thread manufactured through the above-described manufacturing steps has negative attachment portions formed at precisely controlled angular intervals while rotating around the circumference of the yarn. Thanks to the unique post-twist-free rotational molding method for the yarn of the present invention, the lifting thread according to one embodiment of the present invention can make the spacing between the negative attachment portions denser than in the prior art, while also accurately forming the distance and angular spacing between the attachment portions as intended, thereby providing excellent adhesion to skin tissue when inserted subcutaneously. Furthermore, since all attachment portions are formed only in negative form without any positive attachment portions, the effect of minimizing patient pain during the procedure can be achieved along with the excellent adhesion described above. In terms of the manufacturing process for forming the rotary binding portion, compared to the method of the second conventional technology described above (a method in which a binding portion is formed only on one side of the yarn, followed by an additional process of twisting the yarn while it is heated, and then cooling to maintain the twisted state of the yarn), it is possible to produce a lifting thread with the rotary binding portion uniformly arranged around the circumference of the yarn on a single process line, thus being superior in terms of process efficiency, defective product management, and contamination prevention.

[0055] Although the present disclosure has been described above with specific details such as specific components, limited embodiments, and drawings, this is provided only to aid in a more comprehensive understanding of the present disclosure and is not limited to the above embodiments, and a person skilled in the art to which the present disclosure belongs may make various modifications and variations from this description.

[0056] Accordingly, the concept of the present disclosure should not be limited to the embodiments described above, and should be interpreted as falling within the scope of the concept of the present disclosure, including the claims set forth below as well as all equivalent or equivalent variations thereof.

Claims

Claim 1 delete Claim 2 delete Claim 3 A device for manufacturing a thread for a lifting procedure, comprising: a winding unit for winding a thread for a lifting procedure; first and second holding units for holding the thread unwound from the winding unit to restrict movement; first and second rotating units for simultaneously rotating the thread held by the first and second holding units at a predetermined same angle; a forming unit for forming an intaglio bonding part on the thread that has been rotated by the first and second rotating units using a forming blade, and then sliding to repeat the operation of forming an additional intaglio bonding part after the next rotation is completed; and a feeding unit for retrieving the thread that has been processed to a preset length when the movement of the thread is suppressed by the first and second holding units and the processing of the intaglio bonding part for a specific length is completed by the forming unit and the first and second rotating units, and the first and second holding units release the movement restriction on the thread. The feeding unit and the winding unit are disposed at the outermost edge, and the first and second holding units are disposed inside, and the first An apparatus for manufacturing a thread for a lifting procedure, wherein the first and second rotating parts are disposed between the first and second holding parts, and the molding part is disposed between the first and second rotating parts. Claim 4 An apparatus for manufacturing a thread for a lifting procedure according to claim 3, additionally comprising a tension application part that tightens the yarn whose movement is suppressed by the first and second holding parts.

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