Cotton linter-derived rayon fiber spunlace nonwoven and a method for manufacturing the same

Abstract

This invention relates to a spunlace nonwoven fabric utilizing cottonseed down-derived rayon fibers and a method for manufacturing the same. The composition of this invention comprises the steps of: preparing a pretreatment solution by dissolving HPC (Hydroxypropyl Cellulose), CMC (Carboxymethyl Cellulose), and sucrose fatty acid ester (Sucrose ester, Sucrose-(O-CO-R)n (n = 1~8))) in a water-soluble medium, and then performing surface functionalization pretreatment by finely spraying the said pretreatment solution onto cottonseed down-derived rayon fibers; forming a nonwoven web with a double structure of a strongly bonded inner layer and a loose surface layer by uniformly arranging the pretreated cottonseed down-derived rayon fibers through a carding process; manufacturing a fabric by hydroentanglement by spraying high-pressure water at 8~9 MJ / kg onto the double-structured nonwoven web to entangle the fibers; and manufacturing the fabric at 0.5~3.0 The process comprises the following steps: a step of maintaining interfiber spacing and improving moisture permeability by adjusting the density to 0.15~0.35 g / cm3 to maintain a loose structure and low crystallinity while compressing with a pressure of MPa; a step of maintaining a porous structure and increasing moisture retention and surface flexibility by drying the fabric in multiple stages from a low temperature of 80~100℃ to a high temperature of 120~130℃; a step of improving hydrophilicity and adhesion by introducing polar groups to the surface through plasma treatment of the fabric surface; a step of softening the fabric by finely spraying a softening agent onto the fabric surface at 80~100 GSM (Gram per Square Metre); a step of forming an embossing pattern on the fabric at a low temperature of 50~70℃; and a step of cutting the manufactured fabric to tissue specifications and packaging it.

Description

Technology Field

[0001] This invention relates to a spunlace nonwoven fabric utilizing rayon fibers derived from cotton linter and a method for manufacturing the same. More specifically, it utilizes high-absorbency and low-hardness rayon derived from cotton linter to retain the inherent softness and elasticity of cotton within the fiber structure; implements a soft yet silky texture by combining HPC (Hydroxypropyl Cellulose), CMC (Carboxymethyl Cellulose), and sucrose ester; secures the tactile sensation of fine fibers and tensile strength through a double-layer structure; reduces inter-fiber cohesion by applying fibers with a dtex of less than 0.9; adopts a low-temperature multi-stage drying method to maintain inter-fiber pores while enhancing moisture retention and surface flexibility; introduces polar groups to the surface through plasma treatment to increase hydrophilicity and adhesion; improves initial moisture absorption and skin tactile sensation through micro-spray softening treatment; and through low-temperature micro-embossing processing The present invention relates to a spunlace nonwoven fabric utilizing cottonseed down-derived rayon fibers and a method for manufacturing the same, which prevents the hardening of the fabric and maintains a soft texture while providing a visual sense of volume and increasing the actual absorption area. Background Technology

[0002] Tissues generally used as wet wipes or dry wipes are made by thinly structuring synthetic fibers, viscose fibers, cotton fibers, cellulose fibers, natural plant fibers, etc., into tissue, adding a chemical solution to it, and sterilizing it so that the user's hands and face, etc., can be wiped regardless of location.

[0003] In addition, tissues are manufactured by impregnating a non-woven fabric with purified water or a functional chemical solution, and the thickness, strength, and absorbency of the non-woven fabric are adjusted according to the intended use.

[0004] Recently, there has been an increasing demand for high-end tissues with a high basis weight in the range of 80 to 100 GSM (Gram per Square Metre) to improve user convenience and usability.

[0005] Generally, tissues are disposable products designed to remove contaminants from skin or various surfaces, requiring a soft touch, excellent absorbency, and sufficient mechanical strength. To meet these requirements, various types of nonwoven fabrics have been used as tissue materials.

[0006] Conventional nonwoven fabrics for tissues are mainly manufactured using fibers such as rayon, polyester, and polypropylene, and manufacturing methods such as the spunlace method, needle punch method, and heat bonding method have been applied. Among these, the spunlace method, which entangles fibers using a high-pressure water jet, is widely used in the manufacture of nonwoven fabrics for tissues because it can achieve a soft feel and excellent absorbency without using adhesives.

[0007] In particular, rayon fibers have been widely used in tissue fabrics due to their excellent hydrophilicity and superior moisture absorption and retention capabilities.

[0008] For reference, a technology for using a tissue material that is manufactured by mixing at least one of the pulp materials recovered by a wet method from waste toilet paper, waste crushed pulp, waste cotton pulp, waste wood pulp, waste recycled pulp, and waste synthetic resin fiber with a plant protein separated and extracted from soybeans, cottonseed, and rapeseed, and using pulp with a basis weight of 30 to 100 g / m² and a tensile strength of 70 to 200 N in the longitudinal direction and 10 to 60 N in the transverse direction has been disclosed by the applicant in the "Eco-friendly Aroma Wet Wipe and Method of Manufacturing the Same" in Korean Registered Patent Publication No. 10-1911667 (Registration Date: October 18, 2018). Prior art literature

[0009] Registered Patent Publication No. 10-1911667 The problem to be solved

[0010] The purpose of the present invention is to further improve the technology of the aforementioned registration number 10-1911667 by using high-absorbency and low-hardness rayon derived from cotton linter to retain the natural softness and elasticity of cotton within the fiber structure.

[0011] The objective of the present invention is to achieve a soft yet silky texture by combining HPC (Hydroxypropyl Cellulose), CMC (Carboxymethyl Cellulose), and sucrose ester.

[0012] The objective of the present invention is to secure the tactile sensation of fine hairs and tensile strength through a double-layer structure.

[0013] The objective of the present invention is to enable the reduction of cohesive force between fibers by applying fibers of less than 0.9 dtex.

[0014] The objective of the present invention is to adopt a low-temperature multi-stage drying method to maintain interfiber pores while increasing moisture retention and surface flexibility.

[0015] The objective of the present invention is to increase hydrophilicity and adhesion by introducing polar groups to the surface through plasma treatment.

[0016] The objective of the present invention is to improve initial moisture absorption capacity and skin texture through micro-spray softening treatment.

[0017] The objective of the present invention is to prevent the hardening of the fabric and maintain a soft texture through low-temperature micro-embossing, while also providing a visual sense of volume and expanding the actual absorption area. means of solving the problem

[0018] As a means to achieve the above-mentioned purpose, the composition of the present invention comprises the steps of: preparing a pretreatment solution by dissolving HPC (Hydroxypropyl Cellulose), CMC (Carboxymethyl Cellulose), and sucrose ester (Sucrose-(O-CO-R)n (n = 1~8))) in a water-soluble medium, and then performing surface functionalization pretreatment by finely spraying the said pretreatment solution onto cottonseed down-derived rayon fibers; forming a nonwoven web with a double structure of a strongly bonded inner layer and a loose surface layer by uniformly arranging the pretreated cottonseed down-derived rayon fibers through a carding process; manufacturing a fabric by hydroentanglement by spraying high-pressure water at 8~9 MJ / kg onto the double-structured nonwoven web to entangle the fibers; and compressing the fabric at a pressure of 0.5~3.0 MPa to maintain a loose structure and low crystallinity, thereby [setting] the density 0.15~0.35 g / cm 3 It is preferable that the process includes the steps of: maintaining the interfiber spacing and improving moisture permeability by adjusting the temperature; drying the fabric in multiple stages from a low temperature of 80 to 100°C to a high temperature of 120 to 130°C to maintain the porous structure and increase moisture retention and surface flexibility; improving hydrophilicity and adhesion by introducing polar groups to the surface through plasma treatment of the fabric surface; softening the fabric by finely spraying a softening agent onto the fabric surface at 80 to 100 GSM (Gram per Square Metre); forming an embossing pattern on the fabric at a low temperature of 50 to 70°C; and cutting the manufactured fabric to fit tissue specifications and packaging it.

[0019] The configuration of the present invention further includes a step of implementing a fabric texture on a nonwoven fabric using a forming device after the step of softening the fabric, wherein the forming device comprises a supply roller for supplying the fabric, a drum device provided in front of the supply roller for implementing a fabric texture on the supplied fabric, and a transfer roller provided in front of the drum device for conveying the fabric on which the fabric texture has been implemented by the drum device, wherein the drum device comprises a plurality of rotating shafts provided in a long direction and rotating around the longitudinal axis, a roller belt connected to the rotating shaft and rotating in a single direction by the rotation of the rotating shaft, a texture forming belt provided in a form wound around the outer surface of the roller belt and in contact with one side of the fabric, and a spray device provided on the upper side of the rotating shaft for spraying high-pressure hot air onto the fabric in contact with the texture forming belt.

[0020] The configuration of the present invention is preferably such that the rotational shaft comprises a main body extending in one direction and having an outer surface in contact with a roller belt, and a plurality of fastening grooves formed at regular intervals on the outer surface of the main body; the roller belt comprises a body extending in one direction, having a lower surface in contact with the outer surface of the rotational shaft and an upper surface in contact with a texture forming belt, a plurality of fastening protrusions provided at regular intervals on the lower surface of the body and protruding in the direction of the rotational shaft, a first extension plate extending from one end in the longitudinal direction of the body and extending adjacent to one surface of the body, a second extension plate extending from the other end in the longitudinal direction of the body and extending adjacent to the other surface of the body, a fixing protrusion protruding from the first extension plate or the second extension plate, and a fixing groove provided on the first extension plate or the second extension plate so that the fixing protrusion is inserted and fixed after the body is wound around the roller belt.

[0021] In the configuration of this invention, the fastening projection is preferably provided in the shape of a trapezoidal column with an area that widens from one side to the other, and has elasticity so that when fastened to the fastening groove of the rotating shaft, the lower part of the fastening projection can easily pass through the upper part of the fastening groove of the rotating shaft.

[0022] In the configuration of this invention, the fixing projection and the fixing groove are formed in the shape of a trapezoidal column with an area that widens from one side to the other, and it is preferable that the fixing projection has elasticity so that when inserted into the fixing groove, the lower part of the fixing projection easily passes through the upper part of the fixing groove.

[0023] The configuration of the present invention is such that the roller belt of the drum device further comprises at least one partition protrusion protruding in the direction of the outer surface and a seating section partitioned by the partition protrusion and on which a texture forming belt is seated, and it is preferable that the texture forming belt has a different fabric texture shape for each seating section.

[0024] In the configuration of this invention, it is preferable that the partition protrusion is provided with a fabric texture band having the same fabric texture shape as any one of the texture molding belts provided in the seating section, so as to prevent a boundary line from being formed by the partition protrusion. Effects of the invention

[0025] This invention has the following effects.

[0026] 1. By using high-absorbency and low-hardness rayon derived from cotton linter, the natural softness and elasticity of cotton can be retained within the fiber structure.

[0027] 2. A soft yet silky texture can be achieved by combining HPC (Hydroxypropyl Cellulose), CMC (Carboxymethyl Cellulose), and sucrose ester.

[0028] 3. The double-layer structure ensures the tactile sensation of fine hairs and tensile strength.

[0029] 4. Use fibers with a density of less than 0.9 dtex to reduce the cohesive force between fibers.

[0030] 5. By adopting a low-temperature multi-stage drying method, moisture retention and surface flexibility can be increased while maintaining pores between fibers.

[0031] 6. Polar groups can be introduced to the surface through plasma treatment to increase hydrophilicity and adhesion.

[0032] 7. Initial moisture absorption and skin texture can be improved through micro-spray softening treatment.

[0033] 8. Low-temperature fine embossing prevents the fabric from hardening and maintains a soft texture, while also providing a visual sense of volume and increasing the actual absorption area. Brief explanation of the drawing

[0034] FIG. 1 is a process flowchart of a method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fibers according to one embodiment of the present invention. FIG. 2 is a diagram showing the configuration of a molding apparatus used in a method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fibers according to one embodiment of the present invention. FIG. 3 is a partial perspective view of the drum device of a molding apparatus used in a method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fibers according to one embodiment of the present invention. FIG. 4 is a diagram showing the configuration of a roller belt of a drum device of a molding device used in a method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fibers according to one embodiment of the present invention. FIG. 5 is a perspective view of the rotation axis of the drum device of a molding device used in a method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fibers according to one embodiment of the present invention. FIG. 6 is another configuration diagram of the drum device of the molding apparatus used in the method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fibers according to one embodiment of the present invention. Specific details for implementing the invention

[0035] Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings so that a person skilled in the art can easily practice the invention. The purposes, functions, effects, and other purposes, features, and operational advantages of the invention, including the purpose, function, and effect, will become clearer through the description of the preferred embodiments.

[0036] For reference, the embodiments disclosed herein are merely the most preferred embodiments selected and presented among various possible embodiments to aid the understanding of those skilled in the art, and the technical concept of the invention is not necessarily limited or restricted only by the presented embodiments, and various changes, additions, and modifications including equivalents and substitutions are possible within the scope of the technical concept of the invention.

[0037] Furthermore, the expressions of terms and words used in the specification and claims of this application are defined based on the principle that the inventor may appropriately define the concept of the terms to best describe his invention; they should not be interpreted as being limited solely to their ordinary or dictionary meanings, but must be interpreted in a sense and concept consistent with the technical spirit of the present invention. For example, singular expressions include plural expressions unless the context clearly indicates otherwise; expressions regarding direction are established based on the location depicted in the drawings for the sake of explanatory convenience; and expressions such as "connected" or "installed" include not only direct connection or installation but also connection or installation mediated by other intermediate components.

[0038] FIG. 1 is a process flowchart of a method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fibers according to one embodiment of the present invention.

[0039] As illustrated in FIG. 1, a method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fibers according to an embodiment of the present invention comprises the steps of: preparing a pretreatment solution in which HPC (Hydroxypropyl Cellulose), CMC (Carboxymethyl Cellulose), and sucrose fatty acid ester (Sucrose ester, Sucrose-(O-CO-R)n (n = 1~8))) are dissolved in a water-soluble medium, and then performing surface functionalization pretreatment by finely spraying the pretreatment solution onto the cottonseed down-derived rayon fibers; forming a nonwoven web with a double structure of a strong bond inner layer and a loose surface layer by uniformly arranging the pretreated cottonseed down-derived rayon fibers using a carding process (S12); and spraying high-pressure water at a rate of 8~9 MJ / kg onto the double-structured nonwoven web to entangle the fibers and thereby hydroentangle the fabric. A manufacturing step (S13), and compressing the fabric at a pressure of 0.5 to 3.0 MPa to maintain a loose structure and low crystallinity, with a density of 0.15 to 0.35 g / cm³ 3The method comprises the following steps: a step (S14) of maintaining the spacing between fibers and improving moisture permeability by adjusting the temperature; a step (S15) of drying the fabric in multiple stages from a low temperature of 80 to 100°C to a high temperature of 120 to 130°C to maintain the porous structure and increase moisture retention and surface flexibility; a step (S16) of improving hydrophilicity and adhesion by introducing polar groups to the surface through plasma treatment of the fabric surface; a step (S17) of softening the fabric by finely spraying a softening agent onto the fabric surface at 80 to 100 GSM (Gram per Square Metre); a step (S18) of forming an embossing pattern on the fabric at a low temperature of 50 to 70°C; and a step (S19) of cutting the manufactured fabric to fit tissue specifications and packaging it.

[0040] The operation of the spunlace nonwoven fabric utilizing cottonseed down-derived rayon fiber according to one embodiment of the present invention and the method for manufacturing the same, based on the above-described composition, is as follows.

[0041] First, cotton fibers are separated from cotton seeds and impurities (seed husks, dust, etc.) are removed. Then, pectin, fat, and wax components are removed through alkali treatment (NaOH aqueous solution, 2~10 wt%), and lignin and pigment components are removed by performing a bleaching process (H2O₂ or NaClO), thereby obtaining high-purity cellulose with a cellulose content of 95% or more.

[0042] Next, high-purity cellulose is immersed in a sodium hydroxide (NaOH) solution to form alkali cellulose, which is then pressed and ground.

[0043] Next, after aging the crushed alkali cellulose, it is reacted with carbon disulfide (CS₂) to form cellulose xanthate.

[0044] Next, cellulose xanthate is dissolved in a diluted NaOH solution to prepare a viscose solution, and then this viscose solution is extruded through a spinneret to form cotton linter-derived rayon fibers with a dtex of 0.9 dtex or less. The cotton linter-derived rayon fibers eliminate the foreign sensation upon contact with the skin by providing a soft, fluffy feel characteristic of natural cotton fibers.

[0045] Next, a pretreatment solution is prepared by dissolving HPC (Hydroxypropyl Cellulose), CMC (Carboxymethyl Cellulose), and sucrose fatty acid ester (Sucrose ester, Sucrose-(O-CO-R)n (n = 1~8))) in a water-soluble medium at a concentration of 0.1~2.0 wt%, and then the pretreatment solution is finely sprayed onto cottonseed down-derived rayon fibers to suppress the stickiness and slipperiness characteristic of rayon and to impart a soft yet silky texture and feel (S11).

[0046] Next, the pretreated cottonseed down-derived rayon fibers are uniformly arranged in a carding process, and the lamination density and directionality of the fibers are controlled by adjusting the card roller speed difference and lamination speed, thereby forming a nonwoven web with a double structure of a strongly bonded inner layer and a loose surface layer (S12). Accordingly, a structure is formed in which the high-density inner layer provides mechanical tensile strength and the surface layer provides a fine hair-like texture.

[0047] Next, a fabric is manufactured by spraying high-pressure water of 8 to 9 Mj / kg onto a double-layered nonwoven web to entangle the fibers, thereby causing hydroentanglement (S13). At this time, fibers with a dtex of 0.9 or less are used to lower the cohesive force between fibers, thereby inducing the fibers to become more finely entangled during hydroentanglement, forming a structure with a relatively high air content and volume, so that the user can feel a soft cushioning sensation.

[0048] Subsequently, the fabric is compressed using a soft calender at a pressure of 0.5 to 3.0 MPa to maintain a loose structure and low crystallinity, with a density of 0.15 to 0.35 g / cm³. 3 It is adjusted to maintain the interfiber spacing and improve moisture penetration (S14).

[0049] Next, the fabric is dried in multiple stages from a low temperature of 80 to 100°C to a high temperature of 120 to 130°C to maintain its porous structure and increase its moisture retention and surface flexibility (S15). By maintaining the elasticity of the fabric through such low-pressure compression and multi-stage drying processes, the stiffness of the fabric is prevented, thereby providing the user with a consistent cotton-like quality.

[0050] Next, a low-pressure plasma device is used to apply a weak plasma treatment to the surface of the fabric to introduce polar groups such as -OH and -COOH to the surface, thereby improving hydrophilicity (absorption rate) and adhesion (S16).

[0051] Next, a softening agent is prepared by dissolving 2% by weight of glycerin and 1% by weight of PEG (Polyethylene Glycol) in a water-soluble medium, and then 1 to 3% by weight of the softening agent relative to the weight of the fabric is finely sprayed onto the surface of the fabric at a rate of 80 to 100 GSM (Gram per Square Metre) to soften the fabric (S17). The above PEG (Polyethylene Glycol) is a hydrophilic polymer that reacts easily with moisture and breaks down the fiber network by weakening the hydrogen bonds between fibers in a water state.

[0052] Next, by forming an embossing pattern on the fabric at a low temperature of 50 to 70°C, the fabric is prevented from hardening and maintains a soft texture while visually increasing the volume and expanding the actual absorption area (S18).

[0053] Next, the fabric manufactured in this way is cut to the tissue specifications and packaged to prevent external contamination (S19).

[0054] Meanwhile, after the step of softening the fabric (S17), a fabric texture can be created on the fabric using a molding device.

[0055] FIG. 2 is a configuration diagram of a molding device used in a method for manufacturing a spunlace nonwoven fabric using rayon fibers derived from cottonseed down according to one embodiment of the present invention, FIG. 3 is a partial perspective view of a drum device of a molding device used in a method for manufacturing a spunlace nonwoven fabric using rayon fibers derived from cottonseed down according to one embodiment of the present invention, FIG. 4 is a perspective view of a rotation axis of a drum device of a molding device used in a method for manufacturing a spunlace nonwoven fabric using rayon fibers derived from cottonseed down according to one embodiment of the present invention, and FIG. 5 is a configuration diagram of a roller belt of a drum device of a molding device used in a method for manufacturing a spunlace nonwoven fabric using rayon fibers derived from cottonseed down according to one embodiment of the present invention.

[0056] As illustrated in FIGS. 2 to 5, the molding device used in the method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fiber according to one embodiment of the present invention comprises a supply roller (100) for supplying a fabric (20), a drum device (200) provided in front of the supply roller (100) for implementing a fabric texture on the supplied fabric (20), and a transfer roller (300) provided in front of the drum device (200) for transferring the fabric (20) on which the fabric texture has been implemented by the drum device (200).

[0057] The drum device (200) comprises a plurality of rotating shafts (210) that are provided in a long direction and rotate along the longitudinal axis, a roller belt (220) that is connected to the rotating shaft (210) and rotates in one direction by the rotation of the rotating shaft (210), a texture forming belt (230) that is provided in a form that is wound around the outer surface of the roller belt (220) and contacts one side of the fabric (20), and a spray device (240) that is provided on the upper side of the rotating shaft (210) and sprays high-pressure hot air onto the fabric (20) that contacts the texture forming belt (230).

[0058] The above-described spray device (240) may be equipped with a heating chamber (241) that heats air supplied from the outside, a high-pressure pump (242) connected to the heating chamber (241) to spray the heated air at high pressure, and a spray nozzle (243) connected to the high-pressure pump (242) to spray high-pressure hot air onto the fabric (20).

[0059] The above spray nozzles (243) are provided in multiple numbers at regular intervals and serve to pressurize the fabric (20) against the texture forming belt (230) through high-pressure heated air.

[0060] The above-mentioned rotating shaft (210) is fixed to a frame (not shown) and rotates in one direction with the frame as the axis, and a roller belt (220) is wound around the above-mentioned rotating shaft (210), and the above-mentioned texture forming belt (230) can rotate and move by means of the roller belt (220) and the rotating shaft (210).

[0061] The above-mentioned rotating shaft (210) may be provided with a main body (211) that is elongated in one direction and whose outer surface contacts the roller belt (220), and a plurality of fastening grooves (212) formed at regular intervals on the outer surface of the main body (211) to correspond to the fastening projections (222) of the roller belt (220) and fasten to the fastening projections (222) of the roller belt (220).

[0062] The above fastening groove (212) is provided in the shape of a trapezoidal column, with the area increasing from one side to the other, similar to the fastening projection (222) of the roller belt (220).

[0063] The above fastening groove (212) may be omitted at the location where the first extension plate (223) and the second extension plate (224) of the roller belt (220) are integrated.

[0064] The roller belt (220) comprises a body (221) which is provided long in one direction, with one side in contact with the outer surface of the rotation axis (210) and the other side in contact with the texture forming belt (230); a plurality of fastening protrusions (222) provided at regular intervals on one side of the body (221) and protruding in the direction of the rotation axis (210); a first extension plate (223) which extends from one end of the body (221) in the longitudinal direction and extends adjacent to one side of the body (221); a second extension plate (224) which extends from the other end of the body (221) in the longitudinal direction and extends adjacent to the other side of the body (221); a fixing protrusion (225) protruding from the first extension plate (223) or the second extension plate (224); and on the first extension plate (223) or the second extension plate (224). A fixing groove (226) may be provided so that a fixing projection (225) is inserted and fixed after the body (221) is wound on the roller belt (220).

[0065] The width of the body (221) is provided to be the same as the width of the rotation axis (210), and the length of the body (221) is provided to be the same as the outer circumference of the rotation axis (210).

[0066] The above fastening projection (222) is provided in the shape of a trapezoidal column with an area that widens from one side to the other, and has elasticity so that when fastened to the fastening groove (212) of the rotation shaft (210), the lower part of the fastening projection (222) can easily pass through the upper part of the fastening groove (212) of the rotation shaft (210).

[0067] The first extension plate (223) and the second extension plate (224) are provided with the same length and thickness, and are integrated through a fixing projection (225) and a fixing groove (226) so that there is no protruding part when the roller belt (220) is wound around the rotation axis (210).

[0068] The above fixing projection (225) and fixing groove (226) are formed in the shape of a trapezoidal column, with the area increasing from one side to the other, just like the fastening projection (222).

[0069] The above fixing projection (225) has elasticity so that when inserted into the fixing groove (226), the lower part of the fixing projection (225) can easily pass through the upper part of the fixing groove (226).

[0070] The roller belt (220) can be conveniently detached from the rotating shaft (210) by applying a fastening method through the fastening projection (222) and fastening groove (212), and the fixing projection (225) and fixing groove (226), thereby facilitating repair and maintenance.

[0071] Meanwhile, between the supply roller (100) and the transfer roller (300), a plurality of tension rollers (not shown) that apply tension to the fabric (20) may be provided.

[0072] The above fabric (20) is supplied to a drum device (200) through a supply roller (100), and the drum device (200) is manufactured into a nonwoven fabric (10) with enhanced durability through a transverse arrangement and fabric texture on the supplied fabric (20), and the conveying roller (300) conveys the nonwoven fabric (10).

[0073] The above nonwoven fabric (10) is made to have a fabric texture by a drum device (200) and has enhanced lateral durability, so it has an excellent visual effect that distinguishes it from ordinary nonwoven fabric, and is recognized as a high-end product. It can also provide consumers with a more comfortable and natural user experience by maintaining a unique soft touch while giving a texture similar to fabric through a pattern. In addition, by optimizing the fabric pattern design of the fibers to improve lateral strength and durability, it has high resistance to tearing or abrasion during actual use, resulting in excellent durability. Accordingly, it can give the tissue a premium image while providing product reliability and differentiated satisfaction.

[0074] Next, a modified example of the drum device (200) mentioned above will be described. In the following description, only the parts that differ from the above-described embodiment will be described in detail, and detailed descriptions of parts that are identical or extremely similar will be omitted.

[0075] FIG. 6 is another configuration diagram of the drum device of the molding apparatus used in the method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fibers according to one embodiment of the present invention.

[0076] Referring to FIG. 6, the roller belt (220) of the drum device (200) further comprises at least one partition projection (227) protruding in the direction of the outer surface, and a seating section (228) partitioned by the partition projection (227) and on which a texture forming belt (230) is seated.

[0077] In addition, the texture forming belt (230) can have the effect of enabling various fabric textures to be realized on a single fabric (20) by having different fabric texture shapes for each set-up section (228).

[0078] In addition, the above-mentioned section protrusion (227) is provided with a fabric texture band (229) having the same fabric texture shape as one of the texture molding belts (230) provided in the seating section (228), so as to have the effect of preventing a boundary line from being formed by the section protrusion (227). Explanation of the symbols

[0079] 10 : Non-woven fabric 20 : Fabric 100 : Supply roller 200 : Drum device 210 : Rotation axis 211 : Main body 212 : Fastening groove 220 : Roller belt 221 : Body 222 : Fastening projection 223 : 1st extension plate 224 : 2nd extension plate 225 : Fixing projection 226 : Fixing groove 230 : Texture molding belt 240 : Spray device 241 : Heating chamber 242 : High-pressure pump 243 : Spray nozzle 300 : Transfer roller

Claims

Claim 1 A step of preparing a pretreatment solution by dissolving HPC (Hydroxypropyl Cellulose), CMC (Carboxymethyl Cellulose), and sucrose ester (Sucrose-(O-CO-R)n (n = 1~8)) in a water-soluble medium, and performing surface functionalization pretreatment by finely spraying the said pretreatment solution onto cottonseed down-derived rayon fibers; a step of forming a nonwoven web with a double structure of a strongly bonded inner layer and a loose surface layer by uniformly arranging the pretreated cottonseed down-derived rayon fibers using a carding process; a step of manufacturing a fabric by hydroentanglement by spraying high-pressure water at 8~9 MJ / kg onto the double-structured nonwoven web to entangle the fibers; and a step of compressing the fabric at a pressure of 0.5~3.0 MPa to achieve a density of 0.15~0.35 g / cm³ to maintain a loose structure and low crystallinity. 3 A method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fibers, characterized by comprising the steps of: a step of maintaining inter-fiber spacing and improving moisture permeability by adjusting the temperature; a step of drying the fabric in multiple stages from a low temperature of 80 to 100°C to a high temperature of 120 to 130°C to maintain a porous structure and increase moisture retention and surface flexibility; a step of improving hydrophilicity and adhesion by introducing polar groups to the surface through plasma treatment of the fabric surface; a step of softening the fabric by finely spraying a softening agent onto the fabric surface at 80 to 100 GSM (Gram per Square Metre); a step of forming an embossing pattern on the fabric at a low temperature of 50 to 70°C; and a step of cutting the manufactured fabric to tissue specifications and packaging it. Claim 2 A method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fiber, wherein, in claim 1, after the step of softening the fabric, the method further includes a step of creating a fabric texture on the nonwoven fabric using a forming device, wherein the forming device comprises a supply roller for supplying the fabric, a drum device provided in front of the supply roller for creating a fabric texture on the supplied fabric, and a transfer roller provided in front of the drum device for transferring the fabric having created a fabric texture by the drum device, wherein the drum device comprises a plurality of rotating shafts provided long in one direction and rotating around a longitudinal axis, a roller belt connected to the rotating shaft and rotating in one direction by the rotation of the rotating shaft, a texture forming belt provided in a form wound around the outer surface of the roller belt and in contact with one side of the fabric, and a spray device provided on the upper side of the rotating shaft for spraying high-pressure hot air onto the fabric in contact with the texture forming belt. Claim 3 In claim 2, the rotation axis comprises a main body that is elongated in one direction and whose outer surface contacts a roller belt, and a plurality of fastening grooves formed at regular intervals on the outer surface of the main body; the roller belt comprises a body that is elongated in one direction and whose lower surface contacts the outer surface of the rotation axis and whose upper surface contacts a texture forming belt, a plurality of fastening protrusions that are provided at regular intervals on the lower surface of the body and protrude in the direction of the rotation axis, a first extension plate extending from one end in the longitudinal direction of the body and extending adjacent to one surface of the body, a second extension plate extending from the other end in the longitudinal direction of the body and extending adjacent to the other surface of the body, a fixing protrusion protruding from the first extension plate or the second extension plate, and a fixing groove provided on the first extension plate or the second extension plate so that the fixing protrusion is inserted and fixed after the body is wound on the roller belt, characterized in that it is a method for manufacturing a spunlace nonwoven fabric using rayon fibers derived from cotton seed fluff. Claim 4 A method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fiber, characterized in that, in claim 3, the fastening projection is provided in the shape of a trapezoidal column with an area that widens from one side to the other, and has elasticity so that when fastened with the fastening groove of a rotating shaft, the lower part of the fastening projection easily passes through the upper part of the fastening groove of the rotating shaft. Claim 5 A method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fiber, characterized in that, in claim 4, the fixing protrusion and the fixing groove are formed in the shape of a trapezoidal column with an area that widens from one side to the other, and the fixing protrusion has elasticity so that when inserted into the fixing groove, the lower part of the fixing protrusion easily passes through the upper part of the fixing groove. Claim 6 A method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fiber, wherein, in claim 5, the roller belt of the drum device further comprises at least one partition protrusion protruding in the direction of the outer surface and a seating section partitioned by the partition protrusion and on which a texture forming belt is seated, and wherein the texture forming belt has a different fabric texture shape for each seating section. Claim 7 A method for manufacturing a spunlace nonwoven fabric using cottonseed down-derived rayon fiber, characterized in that, in claim 6, the partition protrusion is provided with a fabric texture band having the same fabric texture shape as any one of the texture-forming belts provided in the seating section, thereby preventing a boundary line from being formed by the partition protrusion. Claim 8 A spunlace nonwoven fabric utilizing cottonseed down-derived rayon fibers, characterized by being manufactured by any one of the manufacturing methods of claims 1 to 7.

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