Fine denier elastic non-woven fabric and preparation method and application thereof

Abstract

The invention discloses a fine-denier elastic non-woven fabric and a preparation method and application thereof.The fine-denier elastic non-woven fabric comprises an upper-layer non-woven fabric, a lower-layer non-woven fabric and an elastic component clamped between the upper-layer non-woven fabric and the lower-layer non-woven fabric, and the elastic component comprises a plurality of S-shaped first elastic rubber bands and a plurality of S-shaped second elastic rubber bands; the first elastic rubber band and the second elastic rubber band are sequentially arranged, the first elastic rubber band and the second elastic rubber band are arranged in a mirror image mode, the first elastic rubber band and the second elastic rubber band are arranged to be in a net shape, and the fine denier elastic non-woven fabric is manufactured through the steps of distance adjusting, non-woven fabric conveying, S-shaped guiding, bonding, pressing and dead pressing. According to the manufactured fine denier elastic non-woven fabric, the elastic component is designed to be of a net-shaped structure, so that the fine denier elastic non-woven fabric has elasticity in the transverse direction and the longitudinal direction, is better attached to the human body, is higher in wrapping performance and can be applied to the industries of baby diapers, menstrual period pants, adult incontinence pants and disposable shorts.

Description

Technical Field

[0001] The present invention relates to the field of core preparation, and particularly relates to a fine-denier elastic non-woven fabric, a preparation method thereof, and an application thereof. Background Art

[0002] Water-absorbent sanitary materials, including feminine hygiene products such as sanitary napkins and pantiliners, as well as baby diapers for baby hygiene products and adult diapers for adult care products, all require the use of elastic non-woven fabrics to be used for fitting and padding at the waist, legs, crotch, and sides of the wearer, so as to generally provide the greatest degree of extensibility, the most comfortable wearing conditions, improved leak-proof protection, and better fit.

[0003] As described in the properties of the creel elastic laminate in Patent CN 110035728 A, the basic structure includes a topsheet, a backsheet, and an absorbent core disposed between the topsheet and the backsheet; a first elastomeric laminate, the first elastomeric laminate includes a first base layer and a second base layer, and a first plurality of elastic members disposed between the first base layer and the second base layer; wherein the first plurality of elastic members include a) about 10 to about 1000 elastic strands, b) an average strand spacing of about 0.25 mm to about 4 mm, c) an average fineness of about 10 to about 500, and d) an average pre-strain of about 50% to about 400%; wherein the first base layer and the second base layer each have a basis weight of about 6 g / m² to about 30 g / m²; and wherein the first plurality of elastic members have a contact area percentage of at least one of the following: a) greater than about 11% at 100 um, b) greater than about 28% at 200 um, and c) greater than about 51% at 300 um; and wherein the first plurality of elastic members have a 2%-98% height value of <1.6 mm.

[0004] The elastic members disclosed herein only have elastic rubber bands provided in the longitudinal direction (MD) of the non-woven fabric, so that the non-woven fabric has elasticity in the longitudinal direction, but only has elasticity in the longitudinal direction and has no elasticity in the transverse direction (CD), resulting in insufficient fit with the human body and poor wrapping property. Therefore, it is necessary to provide a fine-denier elastic non-woven fabric, a preparation method thereof, and an application thereof. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the background art and provide a fine-denier elastic non-woven fabric, a preparation method thereof, and an application thereof.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: A fine-denier elastic non-woven fabric, comprising an upper non-woven fabric (1), a lower non-woven fabric (2), and a plurality of elastic components (3) sandwiched therebetween. The elastic components (3) include a plurality of first elastic rubber bands (31) and second elastic rubber bands (32) in an S shape. The first elastic rubber bands (31) and the second elastic rubber bands (32) are arranged in sequence. The upper non-woven fabric (1) and the lower non-woven fabric (2) each have a basis weight of less than 6 grams per square meter.

[0007] In the present invention, the S-shaped first elastic rubber band has elastic effects both longitudinally and transversely, enabling good use effects in each product application field. Especially in the field of baby diapers, this patented technology can be applied to the waist, legs, crotch, etc. At the same time, the upper non-woven fabric and the lower non-woven fabric each have a material with a basis weight of less than 6 grams per square meter. Compared with the materials on the market that are all 10 grams per square meter, the materials become thinner, softer, and more breathable.

[0008] The first elastic rubber bands (31) and the second elastic rubber bands (32) are arranged in a mirror image. After the first elastic rubber bands (31) and the second elastic rubber bands (32) are arranged, they form a net shape. By designing the elastic components into a net structure in the present invention, the fine-denier elastic non-woven fabric has elasticity in both the transverse and longitudinal directions, fits the human body better, and has stronger wrapping properties.

[0009] The first elastic rubber bands (31) and the second elastic rubber bands (32) are arranged in a mirror image. After the first elastic rubber bands (31) and the second elastic rubber bands (32) are arranged, they form a cross-shaped net. By designing the elastic components into a cross-shaped net structure in the present invention, the fine-denier elastic non-woven fabric has elasticity in both the transverse and longitudinal directions, fits the human body better, and has stronger wrapping properties. At the same time, due to the transverse and longitudinal crossing, they can influence each other, making it more stable.

[0010] The plurality of elastic components include about 10 to about 1000 elastic strands. The spacing A between two first elastic rubber bands 31 is between 0 mm and 20 mm, with an average fineness of about 10 to about 500, and an average pre-strain of about 50% to about 400%. It has good elasticity and a non-tactile feeling with large-area elasticity.

[0011] A method for preparing a fine-denier elastic non-woven fabric, characterized by comprising the following steps: S1. Adjust the spacing and adjust the gap between the guide columns on the upper non-woven fabric guiding mechanism and the lower non-woven fabric guiding mechanism of the elastic rubber band applying device to a suitable position. S2. Convey the non-woven fabric. The upper non-woven fabric is conveyed to the pressing roller through the upper non-woven fabric guiding mechanism of the elastic rubber band applying device, and the lower non-woven fabric is conveyed to the pressing roller through the lower non-woven fabric guiding mechanism. S3, S-shaped guiding. The first elastic rubber band is guided into an S shape through the first elastic rubber band guiding mechanism, and the second elastic rubber band is guided into an S shape that is a mirror image of the first elastic rubber band through the second elastic rubber band guiding mechanism; S4, Adhesion. The first elastic rubber band guided into an S shape is then sprayed with glue through the glue outlet of the first elastic rubber band guiding mechanism and then adhered to the upper surface of the upper non-woven fabric; the second elastic rubber band guided into an S shape is then sprayed with glue through the glue outlet of the second elastic rubber band guiding mechanism and then adhered to the upper surface of the lower non-woven fabric; S5, Pressing. The upper non-woven fabric with the first elastic rubber band adhered and the lower non-woven fabric with the second elastic rubber band adhered are pressed through a pressing roller, so that the first elastic rubber band and the second elastic rubber band are arranged in sequence between the two non-woven fabrics in a net shape, forming a fine-denier elastic non-woven fabric; S6, Dead pressing. The fine-denier elastic non-woven fabric is further pressed through a dead pressing mechanism, so that the produced fine-denier elastic non-woven fabric is more fitting.

[0012] In the present invention, through the step of adjusting the spacing, the gap between the guide columns on the upper non-woven fabric guiding mechanism and the lower non-woven fabric guiding mechanism of the elastic rubber band applying device is adjusted to a suitable position, so that the elastic rubber band applying device can be applicable to elastic rubber bands with different spacings, enhancing the applicability of the device.

[0013] In the present invention, through the non-woven fabric conveying step, the upper non-woven fabric is conveyed onto the pressing roller, and the lower non-woven fabric is conveyed onto the pressing roller. Through the S-shaped guiding step, the first elastic rubber band and the second elastic rubber band are guided into mirror-image S shapes. Through the adhesion step, the first elastic rubber band guided into an S shape is adhered to the upper surface of the upper non-woven fabric, and the second elastic rubber band guided into an S shape is adhered to the upper surface of the lower non-woven fabric. Through the pressing step, the upper non-woven fabric with the first elastic rubber band adhered and the lower non-woven fabric with the second elastic rubber band adhered are pressed through a pressing roller, so that the first elastic rubber band and the second elastic rubber band are arranged in sequence between the two non-woven fabrics in a net shape, forming a net-shaped fine-denier elastic non-woven fabric.

[0014] In the present invention, through the dead pressing step, the fine-denier elastic non-woven fabric is further pressed through a dead pressing mechanism, so that the produced fine-denier elastic non-woven fabric is more fitting.

[0015] The elastic rubber band applying device includes an upper non-woven fabric guiding mechanism, a lower non-woven fabric guiding mechanism, a first elastic rubber band guiding mechanism, a second elastic rubber band guiding mechanism, a pressing roller, and a dead pressing mechanism; The first elastic rubber band guiding mechanism and the second elastic rubber band guiding mechanism are located on opposite sides and are used to guide the elastic rubber band into a mirror-image S shape; The pressing roller is located below the first elastic rubber band guiding mechanism and the second elastic rubber band guiding mechanism, and is used to press the upper non-woven fabric guiding mechanism with the first elastic rubber band and the lower non-woven fabric with the second elastic rubber band; The upper non-woven fabric guiding mechanism is used to guide the upper non-woven fabric to below the first elastic rubber band guiding mechanism; The lower non-woven fabric guiding mechanism is used to guide the lower non-woven fabric to below the second elastic rubber band guiding mechanism.

[0016] The first elastic rubber band guiding mechanism includes a slide rail, a guiding column, a fixed frame, and a glue discharging plate. The fixed frame is arranged on the slide rail, and the length direction of the fixed frame is consistent with the sliding direction of the slide rail. The glue discharging plate is arranged on the upper surface of the fixed frame. A plurality of the guiding columns are arranged on the upper surface of the glue discharging plate along the length direction of the glue discharging plate. A gap for the rubber band to pass through is arranged between two of the guiding columns. A plurality of glue discharging holes are formed in the glue discharging plate, and each glue discharging hole corresponds to a gap. A V-shaped limiting groove is formed at the position of the glue discharging plate corresponding to the glue discharging hole.

[0017] The second elastic rubber band guiding mechanism is arranged in a mirror image of the first elastic rubber band guiding mechanism, and has the same structure as that of the first elastic rubber band guiding mechanism.

[0018] In the present invention, the first elastic rubber band passes through the gap between the guiding columns for guiding. One rubber band can pass through each gap. Then, the first elastic rubber band is limited in the V-shaped limiting groove through the V-shaped limiting groove, which is convenient for later spraying glue on the first elastic rubber band. Then, the fixed frame moves on the slide rail, driving the glue discharging plate to swing. The swinging direction of the glue discharging plate is perpendicular to the running direction of the non-woven fabric. Then, the glue discharging holes on the glue discharging plate discharge glue, so that the first elastic rubber band is coated with glue. When the first elastic rubber band passes over the upper surface of the upper non-woven fabric, it can adhere to the non-woven fabric and generate a row of arrayed S-shaped first elastic rubber bands.

[0019] Preferably, the glue discharging plate is composed of a plurality of glue discharging blocks. Each glue discharging block is provided with the glue discharging hole. The guiding column is arranged on the glue discharging block. A first scissor structure is arranged at the bottom of the glue discharging plate. The first scissor structure is formed by serial connection and hinging of the fork-shaped connecting rods at the head and tail. A plurality of through holes are arranged on the first scissor structure for the glue discharging pipe of the glue gun to pass through. Each glue discharging block is arranged at each intersection. The head end of the first scissor structure is fixedly connected with a first connecting plate, and the tail end of the first scissor structure is fixedly connected with a second connecting plate. The first connecting plate is fixedly connected with the fixed frame. A spacing adjusting electric push rod is fixed in the fixed frame, and the push rod end of the spacing adjusting electric push rod is fixedly connected with the second connecting plate.

[0020] The present invention drives the expansion and contraction of the first scissor structure by adjusting the expansion and contraction of the spacing-adjusting electric push rod, thereby changing the spacing between the glue discharging blocks, and thus changing the spacing between the guide columns, so that the glue discharging plate can be applicable to elastic rubber bands of different thicknesses, and at the same time can also adapt to the production of elastic components with different spacings, making the application range of the device wider.

[0021] Preferably, a glue discharging gun corresponds to the bottom of each of the glue discharging holes, and the nozzle of the glue discharging port of the glue discharging gun fits with the glue discharging hole, which can prevent the glue discharging gun from spraying glue everywhere during the glue spraying process. A second scissor structure is provided at the bottom of the glue discharging gun, and the glue discharging gun is provided at each intersection of the second scissor structure. One end of the second scissor structure is connected to the first connecting plate, and the other end is connected to the second connecting plate. The glue discharging gun is a prior art, so it will not be described in detail in this case.

[0022] The second scissor structure of the present invention expands and contracts through the spacing-adjusting electric push rod, thereby driving the glue discharging gun to expand and contract, so that the glue discharging gun can always correspond to the glue discharging hole, and it is convenient to discharge glue after adjusting the spacing.

[0023] Preferably, in order to prevent the glue discharging gun from spraying glue everywhere during the glue spraying process, the nozzle of the glue discharging tube of the glue discharging gun is always fitted with the glue discharging hole. The glue discharging tube of the glue discharging gun is a telescopic glue discharging tube, and the telescopic glue discharging tube includes an outer tube, an inner tube, a rotating gear, a passive gear, a rack, a sealed telescopic tube, a rotating motor, and a rotating bearing. The inner tube is arranged inside the outer tube, and the racks are arranged on the opposite side walls of the inner tube. One rack meshes with the rotating gear, and the other rack meshes with the passive gear. The rotating gear rotates through the rotating motor, and the rotating motor is fixed on the side wall of the outer tube. The passive gear is fixedly connected to the inner ring of the rotating bearing, and the outer ring of the rotating bearing is fixedly connected to the outer tube. The sealed telescopic tube is a hose with a wavy cross section. One end of the hose is fixedly connected to the inner wall of the outer tube, and the other end is fixedly connected to the outer side wall of the inner tube. The inner tube faces the glue discharging hole.

[0024] The present invention sets the glue discharging tube into a telescopic structure. When the first scissor structure expands and contracts, the glue discharging tube can first shorten to prevent the glue discharging tube from hindering the expansion and contraction of the first scissor structure. After that, when the first scissor structure finishes expanding and contracting, the glue discharging tube can extend to the bottom of the glue discharging hole again, so that the glue discharging tube is always in a state of fitting with the glue discharging hole during glue discharging, preventing the glue from spraying everywhere and affecting the expansion and contraction of the scissor structure.

[0025] The present invention drives the rotation of the rotating gear through the rotation of the rotating motor, thereby driving the forward and backward movement of the rack, so as to realize the telescopic movement of the inner tube on the outer tube and achieve the telescopic effect.

[0026] By sealing the telescopic tube, the present invention always maintains a sealed state between the inner tube and the outer tube, preventing glue from passing through the gap between the inner tube and the outer tube and affecting the rotating motor.

[0027] Preferably, elastic rubber band guiding rollers are further provided on the sides of the first elastic rubber band guiding mechanism and the second elastic rubber band guiding mechanism. The elastic rubber band guiding roller includes a bracket, a fixed shaft, and positioning pieces. Both ends of the fixed shaft are rotatably arranged on the bracket. The rotational arrangement can adopt the method of bearings. The outer ring of the bearing is fixedly connected to the bracket, and the inner ring of the bearing is fixedly connected to the fixed shaft. A plurality of positioning pieces are fixed on the fixed shaft along the length direction of the fixed shaft. There is a rubber band conveying area left between adjacent two positioning pieces, and each rubber band conveying area corresponds to a gap.

[0028] The present invention conveys the rubber band through the rubber band conveying area, and then the rubber band adheres to and passes through the gap between the guiding columns around the guiding columns. Thus, after the glue discharging block is separated by the first scissor structure, the rubber band can always pass through the V-shaped limiting groove, preventing the rubber band from passing through between the glue discharging blocks after the glue discharging block is separated by the first scissor structure and causing the phenomenon of not passing through the V-shaped limiting groove, thereby affecting the subsequent glue spraying.

[0029] An application of fine-denier elastic non-woven fabric, including its applications in the industries of baby diapers, menstrual pants, adult incontinence pants, and disposable shorts.

[0030] In summary, the beneficial effects of the present invention are as follows: 1. The S-shaped first elastic rubber band of the present invention has elastic effects both longitudinally and transversely, enabling good use effects in each product application field. Especially in the field of baby diapers, this patented technology can be applied to the waist, legs, crotch, etc. At the same time, the upper non-woven fabric and the lower non-woven fabric each have materials with a weight of less than 6 grams per square meter. Compared with the materials of 10 grams per square meter on the market, the materials become thinner, softer, and more breathable. 2. By designing the elastic component into a mesh structure, the present invention enables the fine-denier elastic non-woven fabric to have elasticity both transversely and longitudinally, making it more conformable to the human body and having stronger wrapping properties. 3. Through the non-woven fabric conveying step, the upper non-woven fabric is conveyed to the pressing roller, and the lower non-woven fabric is conveyed to the pressing roller. Through the S-shaped guiding step, the first elastic rubber band and the second elastic rubber band are guided into a mirror-image S shape. Through the bonding step, the S-shaped first elastic rubber band is adhered to the upper surface of the upper non-woven fabric, and the S-shaped second elastic rubber band is adhered to the upper surface of the lower non-woven fabric. Through the pressing step, the upper non-woven fabric with the first elastic rubber band adhered and the lower non-woven fabric with the second elastic rubber band adhered are pressed by the pressing roller, so that the first elastic rubber band and the second elastic rubber band are arranged in sequence in a mesh between the two non-woven fabrics, forming a mesh-like fine-denier elastic non-woven fabric. 4. In the present invention, the first elastic rubber band passes through the gap between the guiding columns for guiding. One rubber band can pass through each gap. Then, through the V-shaped limiting groove, the first elastic rubber band is limited within the V-shaped limiting groove, which is convenient for later spraying glue on the first elastic rubber band. Then, the fixing frame moves on the slide rail, driving the glue outlet plate to swing. The swinging direction of the glue outlet plate is perpendicular to the running direction of the non-woven fabric. Then, the glue outlet holes on the glue outlet plate discharge glue, so that the first elastic rubber band is coated with glue. When the first elastic rubber band passes through the upper surface of the upper non-woven fabric, it can adhere to the non-woven fabric and form a row of arrayed S-shaped first elastic rubber bands; 5. In the present invention, by the telescoping of the spacing adjustment electric push rod, the telescoping of the first scissors structure is driven, thereby changing the spacing between the glue outlet blocks and thus changing the spacing between the guiding columns, so that the glue outlet plate can be applicable to elastic rubber bands of different thicknesses, and at the same time can also adapt to the production of elastic components with different spacings, making the application range of the device wider; 6. The present invention sets the glue outlet pipe into a telescopic structure. When the first scissors structure telescopes, the glue outlet pipe can first shorten to prevent the glue outlet pipe from hindering the telescoping of the first scissors structure. Then, when the first scissors structure finishes telescoping, the glue outlet pipe can extend to the bottom of the glue outlet hole again, so that the glue outlet pipe is always in a state of being in contact with the glue outlet hole during glue discharge, preventing the glue from spraying everywhere and affecting the telescoping of the scissors structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the elastic component in Embodiment 1 of the present invention arranged in a double S-shaped cross pattern with a spacing of 8 mm between adjacent two elastic rubber bands; Figure 2 It is a cross-sectional view schematic diagram of the fine denier stretch non-woven fabric in Embodiment 1 of the present invention; Figure 3 It is a schematic diagram of the elastic component in Embodiment 2 of the present invention arranged in a double S-shaped cross pattern with a spacing of 6 mm between adjacent two elastic rubber bands; Figure 4 It is a cross-sectional view schematic diagram of the fine denier stretch non-woven fabric in Embodiment 2 of the present invention; Figure 5 It is a schematic diagram of the elastic component in Embodiment 3 of the present invention arranged in a double S-shaped cross pattern with a spacing of 4 mm between adjacent two elastic rubber bands; Figure 6 It is a cross-sectional view schematic diagram of the fine denier stretch non-woven fabric in Embodiment 3 of the present invention; Figure 7 It is a schematic diagram of the elastic component in Embodiment 4 of the present invention arranged in a double S-shaped symmetric pattern with a spacing of 20 mm between adjacent two elastic rubber bands; Figure 8 It is a cross-sectional view schematic diagram of the fine denier stretch non-woven fabric in Embodiment 4 of the present invention; Figure 9 It is a schematic diagram of the elastic component in Embodiment 5 of the present invention with a double S-shaped symmetric arrangement and a distance of 2 mm between adjacent elastic rubber bands; Figure 10 It is a schematic cross-sectional view of the fine denier elastic non-woven fabric in Embodiment 5 of the present invention; Figure 11 It is a schematic diagram of the elastic rubber band applying device of the present invention; Figure 12 It is a schematic diagram of the first elastic rubber band guiding mechanism and the second elastic rubber band guiding mechanism of the present invention; Figure 13 It is a schematic diagram of the glue discharging plate in Embodiment 1 of the present invention; Figure 14 It is a schematic diagram of the glue discharging block and the elastic rubber band guiding roller in Embodiment 6 of the present invention; Figure 15 It is a schematic diagram of the glue discharging block and the glue discharging gun in Embodiment 6 of the present invention; Figure 16 It is a schematic diagram of the spacing adjusting electric push rod in Embodiment 6 of the present invention; Figure 17 It is a schematic diagram of the first elastic rubber band passing through the elastic rubber band guiding roller and the guiding column in Embodiment 6 of the present invention; Figure 18 It is a schematic diagram after the glue discharging blocks are combined through the first scissor structure in Embodiment 6 of the present invention; Figure 19 It is a partial cross-sectional schematic diagram of the glue discharging pipe of the glue discharging gun in Embodiment 6 of the present invention; Figure 20 It is a front cross-sectional schematic diagram of the glue discharging pipe of the glue discharging gun in Embodiment 6 of the present invention; Figure 21 It is a schematic diagram of the application of the present invention in a urine diaper; Figure 22 It is a schematic diagram of the change of the elastic rubber band when using the elastic rubber band applying device in Production Example 1 of the present invention; Figure 23 It is a schematic diagram of the change of the elastic rubber band when using the elastic rubber band applying device in Production Example 5 of the present invention; Detailed Description of the Invention

[0032] The following specific embodiments are only explanations of the present invention, and they are not limitations of the present invention. Those skilled in the art can make modifications without creative contributions to these embodiments after reading this specification, but as long as they are within the scope of the claims of the present invention, they are protected by the Patent Law.

[0033] The present invention will be described in detail below with reference to the accompanying drawings by way of examples. Embodiment 1

[0034] AsFigure 1-2 As shown in Figure 1-2 , a fine-denier elastic non-woven fabric includes an upper non-woven fabric 1, a lower non-woven fabric 2, and a plurality of elastic members 3 sandwiched therebetween. The elastic members 3 include a plurality of first elastic rubber bands 31 and second elastic rubber bands 32 in an S shape. The first elastic rubber bands 31 and the second elastic rubber bands 32 are arranged in sequence. The first elastic rubber bands 31 and the second elastic rubber bands 32 are arranged in a mirror image. After the first elastic rubber bands 31 and the second elastic rubber bands 32 are arranged, they form a net shape. The distance A between two first elastic rubber bands 31 is between 8 mm. The radian R of the S shape is 34. The arc size of R depends on the swing amplitude of the glue outlet plate on the elastic rubber band applying device. The S-shaped first elastic rubber bands 31 and second elastic rubber bands 32 both include a convex portion and a concave portion. The distance B from the convex portion of the first elastic rubber band 31 to the convex portion of the second elastic rubber band 32 is 32. The upper non-woven fabric and the lower non-woven fabric each have a basis weight of less than 6 grams per square meter. The plurality of elastic members include about 10 to about 1000 elastic strands, an average fineness of about 10 to about 500, and an average pre-strain of about 50% to about 400%.

[0035] A method for preparing a fine-denier elastic non-woven fabric includes the following steps: S1, Non-woven fabric conveying. The upper non-woven fabric 1 is conveyed to the pressing roller through the upper non-woven fabric guiding mechanism of the elastic rubber band applying device 4, and the lower non-woven fabric 2 is conveyed to the pressing roller through the lower non-woven fabric guiding mechanism; S2, S-shaped guiding. The first elastic rubber band 31 is guided into an S shape through the first elastic rubber band guiding mechanism, and the second elastic rubber band 32 is guided into an S shape that is a mirror image of the first elastic rubber band through the second elastic rubber band guiding mechanism; S3, Adhesion. The S-shaped first elastic rubber band 31 is then sprayed with glue through the glue outlet of the first elastic rubber band guiding mechanism and then adhered to the upper surface of the upper non-woven fabric 1; the S-shaped second elastic rubber band 32 is then sprayed with glue through the glue outlet of the second elastic rubber band guiding mechanism and then adhered to the upper surface of the lower non-woven fabric; S4, Pressing. The upper non-woven fabric with the first elastic rubber band 31 adhered and the lower non-woven fabric 2 with the second elastic rubber band 32 adhered are pressed through the pressing roller, so that the first elastic rubber band and the second elastic rubber band are arranged in sequence between the two non-woven fabrics in a net shape to form a fine-denier elastic non-woven fabric; S5, Final pressing. The fine-denier elastic non-woven fabric is further pressed through the final pressing mechanism, so that the finished fine-denier elastic non-woven fabric fits better.

[0036] As Figures 11-12As shown in FIGS. 22 and 23, the elastic rubber band applying device 4 includes an upper non-woven fabric guiding mechanism 41, a lower non-woven fabric guiding mechanism 42, a first elastic rubber band guiding mechanism 43, a second elastic rubber band guiding mechanism 44, a pressing roller 45, and a pressing mechanism 46; The first elastic rubber band guiding mechanism 43 and the second elastic rubber band guiding mechanism 44 are located on opposite sides and are used to guide the elastic rubber band into a mirror-image S shape; The pressing roller 45 is located below the first elastic rubber band guiding mechanism 43 and the second elastic rubber band guiding mechanism 44 and is used to press the upper non-woven fabric guided by the first elastic rubber band and the lower non-woven fabric guided by the second elastic rubber band together; The upper non-woven fabric guiding mechanism 41 is used to guide the upper non-woven fabric 1 to below the first elastic rubber band guiding mechanism 43; The lower non-woven fabric guiding mechanism 42 is used to guide the lower non-woven fabric 2 to below the second elastic rubber band guiding mechanism 44; As Figure 11 shown, the pressing roller 45 includes two rotating rollers 451 arranged parallel to each other left and right. The two rotating rollers 451 are rotationally controlled by a motor. This is prior art and will not be elaborated in this case. One rotating roller 451 guides the upper non-woven fabric 1 between the two rotating rollers, and the other rotating roller guides the lower non-woven fabric 2 between the two rotating rollers.

[0037] As Figure 11 shown, the pressing mechanism 46 includes a pressing rotating roller 461 and a pressing roller 462. Two pressing rollers 462 are provided along the circumferential direction of the pressing rotating roller 461, one is located above the pressing rotating roller 461, and one is located on the side of the pressing rotating roller 461. When the composite non-woven fabric reaches the pressing mechanism, it passes through the gap between the pressing roller and the pressing rotating roller, thereby further pressing the non-woven fabric.

[0038] As Figure 13 shown, the first elastic rubber band guiding mechanism 43 includes a slide rail 431, a guiding column 432, a fixed frame 433, and a glue outlet plate 434. The fixed frame 433 is arranged on the slide rail 431, and the length direction of the fixed frame 433 is consistent with the sliding direction of the slide rail 431. The glue outlet plate 434 is arranged on the upper surface of the fixed frame 433. A plurality of guiding columns 432 are arranged on the upper surface of the glue outlet plate 434 along the length direction of the glue outlet plate 434. A gap 435 for the rubber band to pass through is provided between the two guiding columns 432. A plurality of glue outlet holes 436 are formed in the glue outlet plate 434, and each glue outlet hole 436 corresponds to a gap 435. A V-shaped limiting groove 430 is formed at the position of the glue outlet plate 434 corresponding to the glue outlet holes 436. As Figure 21As shown in the figure, there is an application of fine-denier elastic non-woven fabric, which is used in the industries of baby diapers, menstrual pants, adult incontinence pants, and disposable shorts.

[0039] Working principle: As Figures 1-13 shown in the figure, during use, through the non-woven fabric conveying step, the upper non-woven fabric 1 is conveyed onto the pressing roller, and the lower non-woven fabric 2 is conveyed onto the pressing roller. Then, the first elastic rubber band 31 passes through the gap 435 between the guide columns 432 for guiding. One rubber band can pass through each gap 435. Then, through the V-shaped limiting groove 430, the first elastic rubber band 31 is limited within the V-shaped limiting groove 430. Then, the fixing frame 433 moves on the slide rail, driving the glue application plate 434 to swing. The swinging direction of the glue application plate 434 is perpendicular to the running direction of the non-woven fabric. Then, the glue outlet holes 436 on the glue application plate 434 discharge glue, so that the first elastic rubber band is coated with glue. When the first elastic rubber band passes through the upper surface of the upper non-woven fabric, it can adhere to the upper non-woven fabric and form a row of arrayed S-shaped first elastic rubber bands. The second elastic rubber band 32 passes through the second elastic rubber band guiding mechanism 44 in the same way as the first elastic rubber band 31, so that the second elastic rubber band 32 adheres to the lower non-woven fabric and forms a row of arrayed S-shaped second elastic rubber bands. Then, through the pressing step, the upper non-woven fabric with the first elastic rubber band 31 adhered and the lower non-woven fabric 2 with the second elastic rubber band 32 adhered are pressed by the pressing roller 45, so that the first elastic rubber band and the second elastic rubber band are arranged in sequence between the two non-woven fabrics in a net shape to form an elastic component, forming a net-shaped fine-denier elastic non-woven fabric. Then, through the pressing and fixing mechanism 46, the produced fine-denier elastic non-woven fabric is made to fit better. Since the elastic component of the produced fine-denier elastic non-woven fabric is designed in a net structure, the fine-denier elastic non-woven fabric has elasticity in both the transverse and longitudinal directions, fits the human body better, and has stronger wrapping properties. Example 2

[0040] As Figures 3-4 shown in the figure, different from Example 1, the distance A between two first elastic rubber bands 31 is 6 mm, and the radian R of the S shape is 44. Example 3

[0041] As Figures 5-6 shown in the figure, different from Example 1, the distance A between two first elastic rubber bands 31 is 4 mm. Example 4

[0042] As Figures 7-8 shown in the figure, different from Example 1, the distance A between two first elastic rubber bands 31 is 20 mm, the radian R of the S shape is 65, and the distance C between the protruding parts of two first elastic rubber bands 31 is 64 mm. Example 5

[0043] As shown Figures 9-10 in FIGS. 1 and 2, a fine denier elastic non-woven fabric includes an upper non-woven fabric 1, a lower non-woven fabric 2, and an elastic member 3 sandwiched therebetween. The elastic member 3 includes a plurality of first elastic rubber bands in an S shape. The first elastic rubber bands 31 are arranged in sequence, and the distance A between two adjacent first elastic rubber bands 31 is between 2 mm, the radian R of the S shape is 32, and the distance C between the protruding portions of two adjacent first elastic rubber bands 31 is 64 mm.

[0044] A method for preparing a fine denier elastic non-woven fabric includes the following steps: S1, Non-woven fabric conveying: The upper non-woven fabric 1 is conveyed to the pressing roller through the upper non-woven fabric guiding mechanism of the elastic rubber band applying device 4, and the lower non-woven fabric 2 is conveyed to the pressing roller through the lower non-woven fabric guiding mechanism; S2, S-shaped guiding: The first elastic rubber bands 31 are guided into an S shape through the first elastic rubber band guiding mechanism; S3, Adhesion: The first elastic rubber bands 31 guided into an S shape are then sprayed with glue through the glue outlet of the first elastic rubber band guiding mechanism, and then adhered to the upper surface of the upper non-woven fabric 1; S4, Pressing: The upper non-woven fabric with the first elastic rubber bands 31 adhered thereto and the lower non-woven fabric 2 are pressed through the pressing roller, so that the first elastic rubber bands are arranged in sequence between the two non-woven fabrics to form a fine denier elastic non-woven fabric; S5, Final pressing: The fine denier elastic non-woven fabric is further pressed through the final pressing mechanism so that the completed fine denier elastic non-woven fabric is more conformable. Example 6

[0045] As Figures 14-20As shown, different from Embodiment 1, the glue discharging plate 434 is composed of a plurality of glue discharging blocks 437. The glue discharging holes 436 are formed in each glue discharging block 437. The guide posts 432 are arranged on the glue discharging blocks 437. A first scissor structure 47 is provided at the bottom of the glue discharging plate 434. The first scissor structure 47 is formed by series-connected articulated fork-type connecting rods. Each crossing point is provided with the glue discharging block 437. A first connecting plate 471 is fixedly connected to the head end of the first scissor structure 47. A second connecting plate 472 is fixedly connected to the tail end of the first scissor structure 73. The first connecting plate 471 is fixedly connected to the fixed frame 433. A spacing-adjusting electric push rod 473 is fixed in the fixed frame 433. The push rod end of the spacing-adjusting electric push rod 473 is fixedly connected to the second connecting plate 472. A glue gun 48 corresponds to the bottom of each glue discharging hole 436. A second scissor structure 480 is provided at the bottom of the glue gun 48. Each crossing point of the second scissor structure 480 is provided with the glue gun 48. One end of the second scissor structure 480 is connected to the first connecting plate 471, and the other end is connected to the second connecting plate 472. The glue discharging pipe 481 of the glue gun 48 is a telescopic glue discharging pipe. The telescopic glue discharging pipe includes an outer pipe 482, an inner pipe 483, a rotating gear 484, a passive gear 485, a rack 486, a sealed telescopic pipe 487, a rotating motor 488, and a rotating bearing 489. The inner pipe 483 is arranged in the outer pipe 482. The racks 486 are arranged on the opposite side walls of the inner pipe 483. One of the racks 486 meshes with the rotating gear 484, and the other rack meshes with the passive gear 485. The rotating gear 484 is rotated by the rotating motor 488. The rotating motor 487 is fixed on the side wall of the outer pipe 482. The passive gear 485 is fixedly connected to the inner ring of the rotating bearing 489. The outer ring of the rotating bearing 489 is fixedly connected to the outer pipe 482. The sealed telescopic pipe 487 is a hose with a wavy cross section. One end of the hose is fixedly connected to the inner wall of the outer pipe 482, and the other end is fixedly connected to the outer side wall of the inner pipe 483. The inner pipe 483 is opposite to the glue discharging hole 436. Elastic rubber band guide rollers 49 are further provided on the sides of the first elastic rubber band guiding mechanism 43 and the second elastic rubber band guiding mechanism 44. The elastic rubber band guide roller 49 includes a bracket 491, a fixed shaft 492, and positioning pieces 493. The two ends of the fixed shaft 492 are rotatably arranged on the bracket 491. A plurality of positioning pieces 493 are fixed on the fixed shaft 492 along the length direction of the fixed shaft 492. A rubber band conveying area 494 is left between two adjacent positioning pieces 493.

[0046] Working principle: As Figures 14-20As shown in the figure, during use, the telescopic tube of the glue gun drives the rotation of the rotating gear 484 and the passive gear through the rotation of the rotating motor 488, thereby driving the shortening of the inner tube 483 to prevent the glue outlet tube from affecting the expansion and contraction of the first scissor structure. Then, through the expansion and contraction of the spacing adjustment electric push rod 473, the expansion and contraction of the first scissor structure 47 is driven, thereby changing the spacing between the glue outlet blocks 437, and thus changing the spacing between the guide posts 432 to adjust to a suitable spacing. At the same time, the second scissor mechanism 480 drives the glue gun to move simultaneously to ensure that each glue gun remains corresponding to the glue outlet hole. After adjusting to a suitable position, the rotating motor 488 rotates in the opposite direction, thereby driving the inner tube to extend out of the outer tube, making the top of the inner tube closely fit with the glue outlet hole. Then, the elastic rubber band guide rollers 49 of the first elastic rubber band guide mechanism 43 convey each first elastic rubber band 31 through their respective rubber band conveying areas 494. After that, the rubber band passes through the gap 435 between the guide posts along the guide posts 432, so that after the glue outlet blocks 437 are separated by the first scissor structure 47, the rubber band can always pass through the V-shaped limiting groove 430. Then, through the V-shaped limiting groove 430, the first elastic rubber band 31 is limited within the V-shaped limiting groove 430. Then, the fixed frame 433 moves on the slide rail, driving the glue outlet plate 434 to swing. The swinging direction of the glue outlet plate 434 is perpendicular to the running direction of the non-woven fabric. Then, the glue outlet holes 436 on the glue outlet plate 434 discharge glue, so that the first elastic rubber band is coated with glue. When the first elastic rubber band passes over the upper surface of the upper non-woven fabric, it can adhere to the upper non-woven fabric and generate a row of arrayed S-shaped first elastic rubber bands. The second elastic rubber band 32 passes through the second elastic rubber band guide mechanism 44 in the same way as the first elastic rubber band 31, so that the second elastic rubber band 32 adheres to the lower non-woven fabric and generates a row of arrayed S-shaped second elastic rubber bands. Then, through the pressing step, the upper non-woven fabric with the first elastic rubber band 31 adhered and the lower non-woven fabric 2 with the second elastic rubber band 32 adhered are pressed by the pressing roller 45, so that the first elastic rubber band and the second elastic rubber band are arranged in sequence between the two non-woven fabrics in a net shape to form an elastic component, forming a net-shaped fine-denier elastic non-woven fabric. Then, through the pressing mechanism 46, the produced fine-denier elastic non-woven fabric is made to fit better. During the whole process, through the step of adjusting the spacing, the gap between the guide posts on the upper non-woven fabric guide mechanism and the lower non-woven fabric guide mechanism of the elastic rubber band applying device 4 is adjusted to a suitable position, so that the glue outlet plate can be suitable for elastic rubber bands of different thicknesses, and at the same time, it can also adapt to the production of elastic components with different spacings, making the application range of the device wider.

Claims

1. A fine-denier elastic non-woven fabric, characterized in that, It includes an upper non-woven fabric (1), a lower non-woven fabric (2), and a plurality of elastic members (3) sandwiched between the two. The elastic members (3) include a plurality of first elastic rubber bands (31) and second elastic rubber bands (32) in an S shape. The first elastic rubber bands (31) and the second elastic rubber bands (32) are arranged in sequence. The upper non-woven fabric (1) and the lower non-woven fabric (2) each have a basis weight of less than 6 grams per square meter.

2. The fine denier elastic non-woven fabric according to claim 1, characterized in that, The first elastic rubber bands (31) and the second elastic rubber bands (32) are arranged in a mirror image. After the first elastic rubber bands (31) and the second elastic rubber bands (32) are arranged, they form a net shape. The plurality of elastic members include about 10 to about 1000 elastic strands. The distance A between two first elastic rubber bands (31) is between 0 mm and 20 mm, with an average fineness of about 10 to about 500, and an average pre-strain of about 50% to about 400%.

3. A method for preparing fine-denier elastic non-woven fabric, characterized in that, It includes the following steps: S1. Adjust the distance and adjust the gap between the guide columns on the upper non-woven fabric guiding mechanism and the lower non-woven fabric guiding mechanism of the elastic rubber band applying device (4) to a suitable position. S2. Convey the non-woven fabric. The upper non-woven fabric (1) is conveyed to the pressing roller through the upper non-woven fabric guiding mechanism of the elastic rubber band applying device (4), and the lower non-woven fabric (2) is conveyed to the pressing roller through the lower non-woven fabric guiding mechanism. S3. S-shaped guiding. The first elastic rubber bands (31) are guided into an S shape through the first elastic rubber band guiding mechanism, and the second elastic rubber bands (32) are guided into an S shape that is a mirror image of the first elastic rubber bands through the second elastic rubber band guiding mechanism. S4. Bonding. The first elastic rubber bands (31) guided into an S shape are then sprayed with glue through the glue outlet of the first elastic rubber band guiding mechanism and then adhered to the upper surface of the upper non-woven fabric (1). The second elastic rubber bands (32) guided into an S shape are then sprayed with glue through the glue outlet of the second elastic rubber band guiding mechanism and then adhered to the upper surface of the lower non-woven fabric. S5. Pressing. The upper non-woven fabric with the first elastic rubber bands (31) adhered and the lower non-woven fabric (2) with the second elastic rubber bands (32) adhered are pressed through the pressing roller, so that the first elastic rubber bands and the second elastic rubber bands are arranged in sequence between the two non-woven fabrics in a net shape to form a fine-denier elastic non-woven fabric. S6. Dead pressing. The fine-denier elastic non-woven fabric is further pressed through the dead pressing mechanism, so that the made fine-denier elastic non-woven fabric is more fitting.

4. The preparation method of a fine denier elastic non-woven fabric according to claim 3, characterized in that, The elastic rubber band applying device (4) is characterized in that it includes an upper non-woven fabric guiding mechanism (41), a lower non-woven fabric guiding mechanism (42), a first elastic rubber band guiding mechanism (43), a second elastic rubber band guiding mechanism (44), a pressing roller (45), and a dead pressing mechanism (46). The first elastic rubber band guiding mechanism (43) and the second elastic rubber band guiding mechanism (44) are located on opposite sides and are used to guide the elastic rubber bands into a mirror-image S shape. The pressing roller (45) is located below the first elastic rubber band guiding mechanism (43) and the second elastic rubber band guiding mechanism (44), and is used to press the upper non-woven fabric guiding mechanism with the first elastic rubber band and the lower non-woven fabric with the second elastic rubber band; The upper non-woven fabric guiding mechanism (41) is used to guide the upper non-woven fabric (1) below the first elastic rubber band guiding mechanism (43); The lower non-woven fabric guiding mechanism (42) is used to guide the lower non-woven fabric (2) below the second elastic rubber band guiding mechanism (44).

5. The preparation method of a fine denier elastic non-woven fabric according to claim 4, characterized in that, The first elastic rubber band guiding mechanism (43) includes a slide rail (431), a guiding column (432), a fixed frame (433), and a glue discharging plate (434). The fixed frame (433) is arranged on the slide rail (431), and the length direction of the fixed frame (433) is consistent with the sliding direction of the slide rail (431). The glue discharging plate (434) is arranged on the upper surface of the fixed frame (433). A plurality of guiding columns (432) are arranged on the upper surface of the glue discharging plate (434) along the length direction of the glue discharging plate (434). A gap (435) for the rubber band to pass through is arranged between two guiding columns (432). A plurality of glue discharging holes (436) are formed in the glue discharging plate (434), and each glue discharging hole (436) corresponds to a gap (435). A V-shaped limiting groove (430) is formed at the position of the glue discharging plate (434) corresponding to the glue discharging hole (436).

6. The preparation method of a fine-denier elastic non-woven fabric according to claim 5, characterized in that, The glue discharging plate (434) is composed of a plurality of glue discharging blocks (437). Each glue discharging block (437) is provided with the glue discharging hole (436). The guiding column (432) is arranged on the glue discharging block (437). A first scissor structure (47) is arranged at the bottom of the glue discharging plate (434). The first scissor structure (47) is formed by the head and tail of the fork-shaped connecting rods being connected in series by hinges. Each crossing point is provided with the glue discharging block (437). The head end of the first scissor structure (47) is fixedly connected with a first connecting plate (471). The tail end of the first scissor structure (73) is fixedly connected with a second connecting plate (472). The first connecting plate (471) is fixedly connected with the fixed frame (433). A spacing adjusting electric push rod (473) is fixed in the fixed frame (433). The push rod end of the spacing adjusting electric push rod (473) is fixedly connected with the second connecting plate (472).

7. The preparation method of a fine denier elastic non-woven fabric according to claim 6, characterized in that, A glue discharging gun (48) corresponds to the bottom of each glue discharging hole (436). A second scissor structure (480) is arranged at the bottom of the glue discharging gun (48). Each crossing point of the second scissor structure (480) is provided with the glue discharging gun (48). One end of the second scissor structure (480) is connected with the first connecting plate (471), and the other end is connected with the second connecting plate (472).

8. The preparation method of a fine denier elastic non-woven fabric according to claim 7, characterized in that The glue outlet tube (481) of the glue gun (48) is a telescopic glue outlet tube, and the telescopic glue outlet tube includes an outer tube (482), an inner tube (483), a rotating gear (484), a passive gear (485), a rack (486), a sealed telescopic tube (487), a rotating motor (488), and a rotating bearing (489). The inner tube (483) is arranged inside the outer tube (482). The rack (486) is arranged on the opposite side walls of the inner tube (483). One of the racks (486) meshes with the rotating gear (484), and the other rack meshes with the passive gear (485). The rotating gear (484) rotates through the rotating motor (488), and the rotating motor (487) is fixed on the side wall of the outer tube (482). The passive gear (485) is fixedly connected to the inner ring of the rotating bearing (489), and the outer ring of the rotating bearing (489) is fixedly connected to the outer tube (482). The sealed telescopic tube (487) is a hose with a wavy cross-section. One end of the hose is fixedly connected to the inner wall of the outer tube (482), and the other end is fixedly connected to the outer side wall of the inner tube (483). The inner tube (483) is opposite to the glue outlet hole (436).

9. The preparation method of a fine denier elastic non-woven fabric according to claim 7, characterized in that, An elastic rubber band guiding roller (49) is further arranged on the sides of the first elastic rubber band guiding mechanism (43) and the second elastic rubber band guiding mechanism (44). The elastic rubber band guiding roller (49) includes a bracket (491), a fixed shaft (492), and a positioning piece (493). The two ends of the fixed shaft (492) are rotatably arranged on the bracket (491). A plurality of positioning pieces (493) are fixed on the fixed shaft (492) along the length direction of the fixed shaft (492), and a rubber band conveying area (494) is left between two adjacent positioning pieces (493).

10. Application of a fine denier elastic non-woven fabric, characterized in that, Application of fine denier stretch non-woven fabric in the industries of baby diapers, menstrual pants, adult incontinence pants, and disposable shorts.

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