Fine denier rubber string waistline elastic body component manufacturing method and waistline elastic body component

Abstract

The invention relates to the technical field of hygienic products, in particular to a manufacturing method of a fine-denier rubber string waistline elastic body component and the waistline elastic body component. The manufacturing method of the fine-denier rubber string waistline elastic body component comprises the steps that 180-260 70-280 denier rubber strings are conveyed at the stretching ratio of 2.0-2.5, and when the rubber strings are conveyed to a laying procedure, the elastic strings are arranged at the stretching ratio of 2.0-2.5; the lower-layer non-woven fabric is laid with the stretching ratio of 2.5-3.0, then glue is sprayed to the rubber band, and the rubber band and the upper-layer non-woven fabric are compounded and bonded to obtain the waistline elastic body component. The invention aims to overcome the defect that the manufacturing cost is increased due to high defective product rate in the production process caused by high possibility of breakage of the thin rubber band in waistline layout in the prior art, and provides the manufacturing method of the fine denier rubber band waistline elastomer component and the waistline elastomer component, so that the occurrence of breakage of the thin rubber band in the production process can be reduced, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sanitary products, and more specifically to a manufacturing method of a fine-denier elastic waist elastic component and the waist elastic component. Background Art

[0002] At present, the baby diapers on the market are mainly divided into waist-tie diapers and pants-type diapers. The existing technology to solve the problem of diaper wearing and fixing mainly relies on several or dozens of thick elastic bands distributed on the waist and abdomen. The decitex range of the used elastic bands is basically 470Dtex~800Dtex, the elastic band stretching ratio is generally 2.8~3.5 times, and the elastic band spacing is generally 5mm~20mm. Although the current conventional thick elastic product design has the advantages of low technical threshold and low cost, due to the small number of elastic bands and the thickness of the elastic bands, when infants and young children wear diapers, the skin area compressed by the elastic bands will be squeezed into the epidermis by the elastic bands. Because the skin of newborns is not fully developed, the stratum corneum is easily worn, causing itching and then infection. On the other hand, there is a big difference in the length of the waist and abdomen circumference of infants and young children before and after drinking milk. After drinking milk, the waist and abdomen circumference increase along with the waist circumference of the diaper, which causes the tension of the waist and abdomen elastic band to increase sharply, causing the infant's waist and abdomen to be under great pressure at all times, which can easily cause spitting up or breathing difficulty, and it is difficult to satisfy the comfort.

[0003] Research shows that if thick rubber bands can be replaced with thin rubber bands and the number of thin rubber bands is increased, the tightness can be greatly relieved while meeting the wearing tension requirements, reducing the pressure on the waist and abdomen of infants and young children, and improving comfort. However, thin rubber bands are prone to breakage at the same stretching ratio due to their small diameter, so the defective rate is high during the production process, greatly increasing the manufacturing cost. Summary of the invention

[0004] The purpose of the present invention is to overcome the disadvantages of the prior art that thin elastic bands arranged at waist circumferences are prone to breakage, resulting in a high defective product rate in the production process and thus increasing the manufacturing cost, and to provide a method for manufacturing a fine-denier elastic waist circumference elastic component and a waist circumference elastic component, which can reduce the occurrence of thin elastic band breakage in the production process and reduce the manufacturing cost.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] Provided is a method for manufacturing a fine-denier elastic waist elastic component, comprising the following steps:

[0007] 180 to 260 elastic bands of 70 to 280 deniers are conveyed at a stretching ratio of 2.0 to 2.5, and when conveyed to the laying process, they are laid on the lower non-woven fabric at a stretching ratio of 2.5 to 3.0, and then the waist elastic component is obtained by spraying glue on the elastic bands and bonding them to the upper non-woven fabric.

[0008] Conventional thick rubber bands use a decitex range of 470 denier to 800 denier, with a laying quantity of 28 to 60, and a rubber band spacing of 5 mm to 20 mm. From the perspective of the decitex range, the thin rubber bands of the present invention are 70 denier to 280 denier, which is much smaller than the diameter of the thick rubber bands, and the number of the thin rubber bands is 180 to 260, which is much more than the thick rubber bands. During the conveying process of the rubber bands, they are conveyed at a lower stretching ratio to avoid the thin rubber bands from being broken due to being too tight during the conveying process. During the laying process, the stretching ratio is increased, which, on the one hand, meets the tensile force requirements of use, and on the other hand, reduces the consumables of the thin rubber bands and saves material costs.

[0009] Thin rubber bands cannot reach the high stretch ratio of thick rubber bands, otherwise they are very easy to break. In addition to making the stretch ratio of thin rubber bands lower than that of thick rubber bands during transportation, thin rubber bands can also be laid at a lower stretch ratio than high rubber bands during laying. The diameter of thin rubber bands is smaller. Within the same area, the number of thin rubber bands laid can be much greater than the number of thick rubber bands laid. Therefore, if thick rubber bands use a lower stretch ratio, they may not be able to meet the tension requirements when worn. However, if a large number of thin rubber bands are laid, it is like a single chopstick has a weak bending resistance, but when multiple chopsticks are bundled, their bending resistance can be greatly increased. The principle is similar. Multiple thin rubber bands laid at a lower stretch ratio can also achieve the same tension as a small number of thick rubber bands laid at a high stretch ratio. However, the use of laying multiple thin rubber bands will not cause a sudden increase in the tension of the waist and abdomen rubber bands due to an increase in waist and abdomen circumference. Therefore, the comfort of the waist elastic body made of thin rubber bands is greatly increased.

[0010] Furthermore, two adjacent elastic bands are arranged in parallel, and the gap between them is 1.5mm to 3.125mm. The parallel arrangement of thin elastic bands can prevent the staggered hinge lines of the elastic bands during transportation or arrangement; the smaller gap between adjacent thin elastic bands can make the thin elastic bands more densely arranged, which is beneficial to improving the overall strength and tension of the waist elastic component.

[0011] Furthermore, during the conveying process of the rubber band, the conveying is carried out in stages, and the stretching ratios of the rubber bands in different stages are kept consistent; or the stretching ratios of the rubber bands in different stages are distributed in a trend from small to large, and the stretching ratio of the rubber bands at the starting end is smaller than the stretching ratio of the rubber bands near the laying process. In order to reduce the risk of the thin rubber bands breaking during the conveying process, the stretching ratio of the rubber bands is reduced during the conveying process, and the staged conveying setting is to facilitate the long-distance conveying of the rubber bands. If the stretching ratio of the rubber bands is kept consistent during the conveying process of the rubber bands in different stages, the entire conveying process can be transported more evenly; if the stretching ratios of the rubber bands in different stages are distributed in a trend from small to large, it is to facilitate the steady transition of the stretching ratio when the rubber bands are conveyed to the laying process, and to reduce the risk of breakage caused by the increase of the instantaneous stretching ratio.

[0012] Furthermore, the elastic band is placed in a straight line when laid on the lower non-woven fabric. Compared with the elastic band placed in an S-shape, the straight line placement can reduce the use of elastic band raw materials, save costs, and improve comfort and enhance breathability.

[0013] Furthermore, the waist elastic component is the waist and abdomen or the waist and buttocks, wherein the denier of the elastic band used to make the waist and abdomen is less than the denier of the elastic band used to make the waist and buttocks, the number of elastic bands used to make the waist and abdomen is more than the number of elastic bands used to make the waist and buttocks, and the layout stretch ratio of the elastic bands used to make the waist and abdomen is less than the layout stretch ratio of the elastic bands used to make the waist and buttocks. The waist and abdomen are located in front of the waist, and the waist and buttocks are located behind the waist. The front and back tightness are different, which is more in line with the waist and abdomen body curve of infants and young children, and prevents excessive stretching from causing abdominal breathing problems in infants and young children or vomiting after drinking milk. Through the different layout of the elastic bands, the tightness of the waist and abdomen is less than the tightness of the waist and buttocks.

[0014] Furthermore, the waist elastic member includes a waist and abdomen and a waist and hips, the waist elastic member is cut to obtain a waist and abdomen and a waist and hips, and then the waist and abdomen are stretched so that the tightness of the waist and abdomen is smaller than the tightness of the waist and hips. By cutting and then stretching and adjusting, the tightness of the waist and abdomen is smaller than the tightness of the waist and hips.

[0015] Furthermore, the tension ratio of the waist and abdomen to the waist and hips is 1.01:1.20. Setting the tension of the waist and abdomen smaller than that of the waist and hips can prevent the infant from having poor abdominal breathing or vomiting after drinking milk due to excessive stretching.

[0016] Furthermore, the manufacturing method of the present invention is applied to a manufacturing device for a fine-denier elastic waist elastic component, the manufacturing device comprising

[0017] The elastic frame is used for elastic feeding and is provided with a plurality of elastic material rollers for winding the elastic;

[0018] A plurality of integrated guide wheels are used to tension and convey multiple rubber bands from different rubber band material rolls, and are arranged in sequence along the rubber band conveying path;

[0019] At least one conveying driving roller assembly, used for driving the rubber conveying and controlling the stretching ratio of the rubber conveying process, and arranged in sequence along the rubber conveying path;

[0020] A laying drive roller assembly is used to control the stretching ratio of the rubber band during laying, and is arranged at the rear end of the conveying drive roller assembly;

[0021] A lower non-woven fabric unwinding assembly is used for feeding the lower non-woven fabric and is arranged at the rear end of the laying drive roller assembly;

[0022] An upper non-woven fabric unwinding assembly is used for feeding the upper non-woven fabric and is arranged at the rear end of the lower non-woven fabric unwinding assembly;

[0023] The first glue gun is used to spray glue on the rubber band to facilitate the composite bonding of the rubber band with the lower non-woven fabric and the upper non-woven fabric to form the waist elastic body component, and is arranged between the lower non-woven fabric unwinding assembly and the upper non-woven fabric unwinding assembly;

[0024] The traction mechanism is used to pull the elastic band, the lower non-woven fabric, and the upper non-woven fabric forward along the production and processing direction;

[0025] The stretching ratio of the rubber band along the conveying driving roller assembly is smaller than the stretching ratio of the rubber band along the laying driving roller assembly.

[0026] The present invention uses an elastic frame to provide support for each elastic material roll, each elastic material roll is wound with elastic, and multiple elastics are tensioned and transported in parallel through an integrated guide wheel. The elastics are first transported through a transport drive roller assembly at a lower stretching ratio to avoid frequent breakage of thin elastics due to excessive tension during long-distance transport. When the thin elastics are transported to the front of the laying process, the transport of the elastics is switched along the laying drive roller assembly to increase the stretching ratio of the elastics. Here, the reason for increasing the elastic ratio is that, on the one hand, the waist elastic body after the elastics are laid can meet the wearing tension requirements and will not fall off due to insufficient tension during use; on the other hand, more waist elastic bodies can be manufactured under the condition of the same length of the elastics, that is, the stretching ratio is high, the amount of elastics can be saved, and thus the material cost can be saved. Conventional elastic bands use the same stretching ratio in both the conveying process and the laying process, which will not cause the problem of breaking for thick elastic bands. However, thin elastic bands are thinner in diameter. If they are conveyed for a long time and a long distance at a high stretching ratio, they are very easy to break. Extremely, if the same low stretching ratio is used from beginning to end, the tension requirement of wearing cannot be met, and the consumables of the elastic bands will be greatly increased, and the cost will be increased. Therefore, the present invention creatively divides the stretching ratio of the conveying process and the laying process of the thin elastic band, so as to meet the actual production requirements, reduce the defective product rate, and save production costs. In particular, according to the difference in the distance of the conveying path, the thin elastic bands with different conveying positions can also be conveyed by different conveying drive roller assemblies in the conveying process. It can also be a step-by-step process in which the stretching ratio gradually increases from the starting end to the laying position, which is more conducive to maintaining the toughness of the thin elastic band and reducing the risk of breaking during the conveying process. Of course, when the conveying path is long, it can also be that each conveying drive roller assembly keeps the thin elastic band at the same stretching ratio for conveying.

[0027] Furthermore, it also includes a plurality of tension sensors for detecting the tension of the rubber band, and each rear end of the conveying drive roller assembly and the rear end of the said layout drive roller assembly are provided with a tension sensor. The tension sensor can monitor the tension of the rubber band in real time, and judge the current stretching ratio of the rubber band by the tension value of the rubber band tension in different stretching ratio ranges. If the stretching ratio is large, it will be fed back to the rear conveying drive roller assembly or the layout drive roller assembly to adjust the tightness of the rubber band slot on the rubber band. If the stretching ratio is too large, it will be slightly relaxed to increase the feeding of the rubber band and reduce the ratio; if the stretching ratio is small, the slot of the rubber band will be clamped, so that the rubber band is stretched tighter, the feeding is reduced, and the ratio is increased.

[0028] Furthermore, it also includes a slitting mechanism for slitting the waist elastic body into the waist and abdomen and the waist and buttocks, which is arranged at the rear end of the upper non-woven fabric unwinding assembly. The slitting mechanism is used for slitting the waist elastic body.

[0029] Furthermore, it also includes a tension adjustment driving roller assembly for adjusting the tightness of the waist and abdomen and / or waist and buttocks, which is arranged at the rear end of the slitting mechanism, and the tightness of the waist and abdomen is smaller than the tightness of the waist and buttocks.

[0030] The waist and hips can continue to be pulled forward in the original direction, while the waist and abdomen pass through the tension-adjusting driving roller assembly to appropriately relax the tension, so that the tightness of the waist and abdomen of the final diaper product is different from that of the waist and hips, that is, the tightness of the waist circumference is different before and after, which is more in line with the waist and abdomen body curve of infants and young children, and prevents excessive stretching from causing abdominal breathing problems in infants and young children or causing vomiting after drinking milk.

[0031] Furthermore, the conveying drive roller assembly includes a conveying drive roller and a conveying drive motor, and the output shaft of the conveying drive motor is connected to the conveying drive roller; the laying drive roller assembly includes a laying drive roller and a laying drive motor, and the output shaft of the laying drive motor is connected to the laying drive roller; the tension adjustment drive roller assembly includes an adjustment drive roller and an adjustment motor, and the output shaft of the adjustment motor is connected to the adjustment drive roller. By adjusting the speed of the conveying drive motor, the speed of the conveying drive roller driven by it can be adjusted, and then the unwinding speed of the rubber band can be adjusted to change the stretching ratio of the rubber band. Similarly, by adjusting the speed of the laying drive motor, the speed of the laying drive roller driven by it can be adjusted, and then the unwinding speed of the rubber band can be adjusted to change the stretching ratio of the rubber band.

[0032] Furthermore, the integrated guide wheel includes a plurality of guide wheels for conveying rubber bands, and the plurality of guide wheels are coaxially arranged. The guide wheels are used to guide and convey the rubber bands, and the coaxially arranged guide wheels can make multiple rubber bands be arranged in parallel to avoid winding during the conveying process of the rubber bands.

[0033] The present invention also provides a waist elastic component, which is manufactured by adopting the manufacturing method of the fine-denier elastic waist elastic component as described above.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The manufacturing method of the fine-denier elastic waist elastic component of the present invention replaces the coarse-denier elastic (i.e., the coarse elastic referred to above) in the conventional waist elastic component with a fine-denier elastic (i.e., the thin elastic referred to above), and reduces the gap of the layout and increases the number of layouts, so that when the tension of a single elastic is reduced, the overall tension remains unchanged, thereby greatly alleviating the feeling of tightening, reducing the pressure on the waist and abdomen of infants and young children, and improving comfort. Since the thin elastic is prone to breakage when subjected to a large stretching ratio, a lower stretching ratio is used for transportation during the thin elastic transportation process to reduce the defective product rate; and in the process of laying the elastic, the stretching ratio is increased, which can not only meet the tension requirements of use, but also reduce the consumables of the thin elastic and save material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of the structure of the manufacturing device of the fine-denier elastic waist elastic component in Example 1, in which the arrows indicate the material conveying direction;

[0037] Figure 2 It is a schematic diagram of the structure of the integrated guide wheel;

[0038] Figure 3 Schematic diagram of the structure of the manufacturing device of the fine-denier elastic waist elastic component in Example 2, in which the arrow indicates the material conveying direction.

[0039] In the accompanying drawings: 100, rubber band frame; 101, rubber band material winding roller; 110, integrated guide wheel; 111, guide wheel; 120, conveying drive roller assembly; 130, laying drive roller assembly; 140, lower non-woven fabric unwinding assembly; 150, upper non-woven fabric unwinding assembly; 160, first glue gun; 170, traction mechanism; 180, tension sensor; 190, slitting mechanism; 200, tension adjustment drive roller assembly. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only used for exemplary descriptions and are only schematic diagrams, not actual drawings, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0041] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0042] Embodiment 1

[0043] This embodiment is a method for manufacturing a fine-denier elastic waist elastic component, which includes the following steps:

[0044] 180 to 260 elastic bands of 70 to 280 deniers are conveyed at a stretching ratio of 2.0 to 2.5, and when conveyed to the laying process, they are laid on the lower non-woven fabric at a stretching ratio of 2.5 to 3.0, and then the waist elastic component is obtained by spraying glue on the elastic bands and bonding them to the upper non-woven fabric.

[0045] Conventional thick rubber bands use a decitex range of 470 to 800 deniers, with a layout of 28 to 60, and a spacing of 5 mm to 20 mm between rubber bands. The thin rubber bands of the present invention are 70 to 280 deniers from the decitex range, and the diameter of the thick rubber bands used in the prior art usually exceeds 400 deniers, so the diameter of the thin rubber bands used in the present invention is much smaller than the diameter of the thick rubber bands; and the number of thin rubber bands is 180 to 260, and the number of thick rubber bands used in the prior art usually does not exceed 50, so the number of thin rubber bands used in the present invention is much more than the number of thick rubber bands. During the conveying process of the rubber bands, they are conveyed at a lower stretching ratio to avoid the thin rubber bands from breaking due to excessive tension during the conveying process. During the layout process, the stretching ratio is increased, which, on the one hand, meets the tensile force requirements for use, and on the other hand, reduces the consumables of the thin rubber bands and saves material costs.

[0046] Furthermore, two adjacent elastic bands are arranged in parallel, and the gap between them is 1.5mm to 3.125mm. The parallel arrangement of thin elastic bands can prevent the staggered hinge lines of the elastic bands during transportation or arrangement; the smaller gap between adjacent thin elastic bands can make the thin elastic bands more densely arranged, which is beneficial to improving the overall strength and tension of the waist elastic component.

[0047] Furthermore, during the conveying process of the rubber band, the conveying is carried out in stages, and the stretching ratios of the rubber bands in different stages are kept consistent; or the stretching ratios of the rubber bands in different stages are distributed in a trend from small to large, and the stretching ratio of the rubber bands at the starting end is smaller than the stretching ratio of the rubber bands near the laying process. In order to reduce the risk of the thin rubber bands breaking during the conveying process, the stretching ratio of the rubber bands is reduced during the conveying process, and the staged conveying setting is to facilitate the long-distance conveying of the rubber bands. If the stretching ratio of the rubber bands is kept consistent during the conveying process of the rubber bands in different stages, the entire conveying process can be transported more evenly; if the stretching ratios of the rubber bands in different stages are distributed in a trend from small to large, it is to facilitate the steady transition of the stretching ratio when the rubber bands are conveyed to the laying process, and to reduce the risk of breakage caused by the increase of the instantaneous stretching ratio.

[0048] Furthermore, the elastic band is placed in a straight line when laid on the lower non-woven fabric. Compared with the elastic band placed in an S-shape, the straight line placement can reduce the use of elastic band raw materials, save costs, and improve comfort and enhance breathability.

[0049] Furthermore, the elastic component of the waist is the waist and abdomen or the waist and buttocks, wherein the denier of the elastic band used to make the waist and abdomen is less than the denier of the elastic band used to make the waist and buttocks, the number of elastic bands used to make the waist and abdomen is more than the number of elastic bands used to make the waist and buttocks, and the layout stretch ratio of the elastic bands used to make the waist and abdomen is less than the layout stretch ratio of the elastic bands used to make the waist and buttocks. The waist and abdomen are located in front of the waist, and the waist and buttocks are located behind the waist. The tightness of the front and back is different, which is more in line with the waist and abdomen body curve of infants and young children, and prevents excessive stretching from causing abdominal breathing problems in infants and young children or causing vomiting after drinking milk. Through the different layout of the elastic bands, the tightness of the waist and abdomen is less than the tightness of the waist and buttocks.

[0050] Furthermore, the tension ratio of the waist and abdomen to the waist and hips is 1.01:1.20. Setting the tension of the waist and abdomen smaller than that of the waist and hips can prevent the infant from having poor abdominal breathing or vomiting after drinking milk due to excessive stretching.

[0051] The manufacturing method of the present invention is applied to a manufacturing device for a fine-denier elastic waist elastic component, such as Figure 1 As shown, the production device includes

[0052] The elastic frame 100 is used for elastic material feeding, and is provided with a plurality of elastic material rollers 101 for winding the elastic material;

[0053] A plurality of integrated guide wheels 110 are used to tension and convey multiple rubber bands from different rubber band material rolls 101, and are sequentially arranged along the rubber band conveying path;

[0054] At least one conveying driving roller assembly 120, used to drive the rubber conveying and control the stretching ratio of the rubber conveying process, and arranged in sequence along the rubber conveying path;

[0055] The driving roller assembly 130 is arranged to control the stretching ratio of the rubber band during the laying process and is arranged at the rear end of the conveying driving roller assembly 120;

[0056] The lower non-woven fabric unwinding assembly 140 is used for feeding the lower non-woven fabric and is arranged at the rear end of the laying driving roller assembly 130;

[0057] The upper non-woven fabric unwinding assembly 150 is used for feeding the upper non-woven fabric and is arranged at the rear end of the lower non-woven fabric unwinding assembly 140;

[0058] The first glue gun 160 is used to spray glue on the elastic band to facilitate the composite bonding of the elastic band with the lower non-woven fabric and the upper non-woven fabric to form the waist elastic component, and is arranged between the lower non-woven fabric unwinding assembly 140 and the upper non-woven fabric unwinding assembly 150;

[0059] The traction mechanism 170 is used to pull the elastic band, the lower non-woven fabric, and the upper non-woven fabric forward along the production and processing direction;

[0060] The stretching ratio of the rubber band along the conveying driving roller assembly 120 is smaller than the stretching ratio of the rubber band along the routing driving roller assembly 130 .

[0061] The present invention uses an elastic frame 100 to provide support for each elastic material roll 101, each elastic material roll 101 is wound with elastic, and multiple elastics are tensioned and transported in parallel through an integrated guide wheel 110. The elastics are first transported by a transport drive roller assembly 120 at a lower stretching ratio to avoid the thin elastics being too tight during long-distance transport and causing frequent breakage. When the thin elastics are transported to the front of the laying process, the transport of the elastics is switched along the laying drive roller assembly 130 to increase the stretching ratio of the elastics. Here, the reason for increasing the elastic ratio is that, on the one hand, the waist elastic body after the elastics are laid can meet the wearing tension requirements and will not fall off due to insufficient tension during use; on the other hand, more waist elastic bodies can be manufactured with the same length of elastics, that is, the stretching ratio is high, which can save the amount of elastics, thereby saving material costs. Conventional elastic bands use the same stretching ratio in both the conveying process and the laying process, which does not cause the problem of breaking for thick elastic bands, but thin elastic bands are thinner in diameter, and are very easy to break if they are conveyed at a high stretching ratio for a long time and a long distance. Extremely, if the same low stretching ratio is used from beginning to end, the tension requirement of wearing cannot be met, and the consumables of the elastic bands will be greatly increased, and the cost will be increased. Therefore, the present invention creatively divides the stretching ratio of the conveying process and the laying process of the thin elastic band, thereby meeting the actual production requirements, reducing the defective product rate, and saving production costs. Specially, according to the difference in the conveying path distance, the thin elastic bands with different conveying positions can also be conveyed by different conveying drive roller assemblies 120 during the conveying process using different stretching ratios, or it can be a step-by-step process in which the stretching ratio gradually increases from the starting end to the laying position, which is more conducive to maintaining the toughness of the thin elastic band and reducing the risk of breaking during the conveying process.

[0062] Furthermore, it also includes a plurality of tension sensors 180 for detecting the tension of the rubber band, and each rear end of the conveying drive roller assembly 120 and the rear end of the layout drive roller assembly 130 is provided with a tension sensor 180. The tension sensor 180 can monitor the tension of the rubber band in real time, and judge the current stretching ratio of the rubber band by the tension value of the rubber band tension in different stretching ratio ranges. If the stretching ratio is large, it will be fed back to the rear conveying drive roller assembly 120 or the layout drive roller assembly 130 to adjust the tightness of the rubber band clamping slot on the rubber band. If the stretching ratio is too large, it will be slightly relaxed to increase the rubber band feeding and reduce the ratio; if the stretching ratio is small, the clamping slot of the rubber band will be clamped, so that the rubber band is stretched tighter, the feeding is reduced, and the ratio is increased.

[0063] Specifically, the conveying drive roller assembly 120 includes a conveying drive roller and a conveying drive motor, and the output shaft of the conveying drive motor is connected to the conveying drive roller; the laying drive roller assembly 130 includes a laying drive roller and a laying drive motor, and the output shaft of the laying drive motor is connected to the laying drive roller; the tension adjustment drive roller assembly 200 includes an adjustment drive roller and an adjustment motor, and the output shaft of the adjustment motor is connected to the adjustment drive roller. By adjusting the speed of the conveying drive motor, the speed of the conveying drive roller driven by it can be adjusted, and then the unwinding speed of the rubber band is adjusted to change the stretching ratio of the rubber band. Similarly, by adjusting the speed of the laying drive motor, the speed of the laying drive roller driven by it can be adjusted, and then the unwinding speed of the rubber band is adjusted to change the stretching ratio of the rubber band.

[0064] Furthermore, if Figure 2 As shown, the integrated guide wheel 110 includes a plurality of guide wheels 111 for conveying rubber bands, and the plurality of guide wheels 111 are coaxially arranged. The guide wheels 111 are used to guide and convey the rubber bands, and the coaxially arranged guide wheels 111 can make multiple rubber bands be arranged in parallel to avoid winding during the rubber band conveying process. Since there are many thin rubber bands, multiple integrated guide wheels 110 can be arranged in parallel to make the layout of the rubber bands more reasonable in a limited space, thereby making the structure of the entire device more compact.

[0065] Preferably, the stretching ratio of the rubber band along the conveying driving roller assembly 120 is 2.0-2.5, and the stretching ratio of the rubber band along the laying driving roller assembly 130 is 2.5-3.0. Thin rubber bands cannot reach the high stretch ratio of thick rubber bands, otherwise they are very easy to break. In addition to making the stretch ratio of thin rubber bands lower than that of thick rubber bands during transportation, thin rubber bands can also be laid at a lower stretch ratio than high rubber bands during laying. The diameter of thin rubber bands is smaller. Within the same area, the number of thin rubber bands laid can be far more than the number of thick rubber bands laid. Therefore, if thick rubber bands use a lower stretch ratio, they may not be able to meet the tension requirements when worn. However, if a large number of thin rubber bands are laid, it is like a single chopstick has weak bending resistance, but when multiple chopsticks are bundled, its bending resistance can be greatly increased. The principle is similar. Multiple thin rubber bands laid at a lower stretch ratio can also achieve the same tension as a small number of thick rubber bands laid at a high stretch ratio. However, the former will not have the phenomenon of a sudden increase in waist and abdomen rubber tension due to an increase in waist and abdomen circumference. Therefore, the comfort of the waist elastic body made of thin rubber bands is greatly increased.

[0066] Embodiment 2

[0067] This embodiment is a second embodiment of a method for making a fine-denier elastic waist elastic component. This embodiment is similar to the first embodiment, except that the waist elastic component includes a waist and abdomen and a waist and hips. The waist elastic component is cut to obtain the waist and abdomen and the waist and hips, and then the waist and abdomen are stretched so that the tightness of the waist and abdomen is less than the tightness of the waist and hips. The tightness of the waist and abdomen is less than the tightness of the waist and hips by stretching and adjusting after cutting.

[0068] In this embodiment, the manufacturing device for the fine-denier elastic waist elastic component is as follows: Figure 3 As shown, the manufacturing device further includes a slitting mechanism 190 based on Example 1, which is used to slit the waist elastic component into waist and abdomen and waist and buttocks, and is arranged at the rear end of the upper non-woven fabric unwinding component 150;

[0069] Furthermore, it also includes a tension adjustment driving roller assembly 200 for adjusting the tightness of the waist and abdomen and / or waist and buttocks, which is arranged at the rear end of the slitting mechanism 190; the tightness of the waist and abdomen is less than the tightness of the waist and buttocks.

[0070] The waist and hips can continue to be pulled forward in the original direction, while the waist and abdomen are appropriately relaxed through the tension-adjusting driving roller assembly 200, so that the waist and abdomen of the final diaper product have different tightness from the waist and hips, that is, the tightness of the waist circumference is different before and after, which is more in line with the body curve of the waist and abdomen of infants and young children, and prevents the infants and young children from having poor abdominal breathing or vomiting after drinking milk due to excessive stretching. Within the scope of knowledge of those skilled in the art, the waist and abdomen and the waist and hips can also be made separately, and the elastic bands can be laid separately. According to needs, the diameter of the elastic bands of the waist and abdomen can be set smaller, and / or the laying gap can be enlarged, so that the overall tension of the waist and abdomen is smaller; while the diameter of the elastic bands of the waist and hips can be set larger, and / or the laying gap can be reduced, so that more elastic bands can be laid, thereby increasing the overall tension.

[0071] Embodiment 3

[0072] This embodiment is an embodiment of a waist elastic component, which is made by adopting the manufacturing method of the fine-denier elastic waist elastic component as mentioned above.

[0073] The waist elastic component of the present invention is made of thin elastic bands, which can greatly alleviate the feeling of tightening, reduce the pressure on the waist and abdomen of infants and young children, and improve comfort.

[0074] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for manufacturing a fine-denier elastic waist elastic component, characterized in that: The following steps are involved: 180 to 260 elastic bands of 70 to 280 deniers are conveyed at a stretching ratio of 2.0 to 2.5, and when conveyed to the laying process, they are laid on the lower non-woven fabric at a stretching ratio of 2.5 to 3.0, and then the waist elastic component is obtained by spraying glue on the elastic bands and bonding them to the upper non-woven fabric.

2. The method for making the fine-denier elastic waist elastic component according to claim 1, characterized in that: Two adjacent rubber bands are arranged in parallel, and the gap between them is 1.5mm to 3.125mm.

3. The method for making a fine-denier elastic waist elastic component according to claim 1, characterized in that: During the rubber band conveying process, the conveying is carried out in stages, and the stretching ratios of the rubber bands in different stages are kept consistent; or the stretching ratios of the rubber bands in different stages are distributed from small to large, and the stretching ratio of the rubber bands at the starting end is smaller than the stretching ratio of the rubber bands near the laying process.

4. The method for making a fine-denier elastic waist elastic component according to claim 1, characterized in that: The elastic band is placed in a straight line when the lower non-woven fabric is laid.

5. The method for manufacturing a fine-denier elastic waist elastic component according to any one of claims 1 to 4, characterized in that: The waist elastic component is the waist and abdomen or the waist and buttocks, wherein the denier of the elastic band used to make the waist and abdomen is smaller than the denier of the elastic band used to make the waist and buttocks, the number of elastic bands used to make the waist and abdomen is greater than the number of elastic bands used to make the waist and buttocks, and the laying stretch ratio of the elastic bands used to make the waist and abdomen is smaller than the laying stretch ratio of the elastic bands used to make the waist and buttocks.

6. The method for manufacturing a fine-denier elastic waist elastic component according to any one of claims 1 to 4, characterized in that: The waist elastic component includes a waist and abdomen and a waist and buttocks. The waist elastic component is cut to obtain a waist and abdomen and a waist and buttocks, and then the waist and abdomen are stretched so that the tightness of the waist and abdomen is less than the tightness of the waist and buttocks.

7. The method for making a fine-denier elastic waist elastic component according to claim 1, characterized in that: The tension ratio of the waist and abdomen to the waist and hips is 1.01:1.

20.

8. The method for manufacturing the fine-denier elastic waist elastic component according to claim 1, characterized in that: A manufacturing device for fine-denier elastic waist elastic parts, the manufacturing device comprising An elastic band frame (100) is used for loading elastic bands and is provided with a plurality of elastic band material rollers (101) for winding the elastic bands; A plurality of integrated guide wheels (110) are used to tension and convey a plurality of rubber bands originating from different rubber band material rolls (101), and are arranged in sequence along the rubber band conveying path; At least one conveying driving roller assembly (120), used for driving the conveying of the rubber band and controlling the stretching ratio during the conveying process of the rubber band, and arranged in sequence along the conveying path of the rubber band; A laying drive roller assembly (130) is used to control the stretching ratio of the rubber band during laying, and is arranged at the rear end of the conveying drive roller assembly (120); A lower non-woven fabric unwinding assembly (140) is used for feeding the lower non-woven fabric and is arranged at the rear end of the laying driving roller assembly (130); An upper non-woven fabric unwinding assembly (150), used for feeding the upper non-woven fabric, and arranged at the rear end of the lower non-woven fabric unwinding assembly (140); A first glue gun (160) is used for spraying glue on the rubber band to facilitate composite bonding of the rubber band with the lower non-woven fabric and the upper non-woven fabric to form a waist elastic component, and is arranged between the lower non-woven fabric unwinding assembly (140) and the upper non-woven fabric unwinding assembly (150); A traction mechanism (170) is used to traction the elastic band, the lower non-woven fabric, and the upper non-woven fabric forward along a production and processing direction; The stretching ratio of the rubber band along the conveying driving roller assembly (120) is smaller than the stretching ratio of the rubber band along the laying driving roller assembly (130).

9. The method for manufacturing the fine-denier elastic waist elastic component according to claim 8, characterized in that: The manufacturing device further comprises a plurality of tension sensors (180) for detecting the tension of the rubber band, and a tension sensor (180) is provided at the rear end of each conveying driving roller assembly (120) and the rear end of the laying driving roller assembly (130).

10. A waist elastic component, characterized in that: The elastic waist elastic component is manufactured by the manufacturing method of the fine-denier elastic waist elastic component as described in any one of claims 1 to 7.

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