A manufacturing process for array elastic waist pants-type baby absorbent products using ultrasonic welding of hot air non-woven fabrics

Abstract

The present invention discloses a process for manufacturing an array of elastic waistband pants-type infant absorbent products using ultrasonic hot-air welding of non-woven fabrics. The process comprises the following steps: A) preparing a waistband base layer; B) combining an elastomer; C) laminating a PE film layer; D) preparing a waistband surface layer; E) laminating the waistband itself; F) forming the elastic space of the waistband; G) preparing the absorbent article body; and H) assembling the waistband units to the absorbent article body. The present invention utilizes an ultrasonic connection structure as the primary method for waistband assembly, reducing the amount of viscose used, helping to reduce the weight of the absorbent article and improve its portability. While ensuring the waistband structure is breathable, lightweight, and comfortable, the overall structure does not significantly differ from existing elastic adhesive waistband products during use, making it suitable for use by infants and young children.

Description

Technical Field

[0001] The present invention belongs to the technical field of absorbent product preparation technology, and specifically relates to a production process of an elastic waist portion. Further, it relates to a production process of an array elastic waist pants-type baby absorbent product using ultrasonic welding of hot air non-woven fabrics. Background Art

[0002] Pants, which can be considered a general term for stretch pants and diapers, are specialized nursing apparel for infants and young children, generally emphasizing fit and comfort. Currently available and under development, most products offer unique and effective solutions to this group's frequent excretion issues. Various leak-proof, highly absorbent, and dry absorbent structures provide a more comfortable wearing experience for infants and young children, significantly reducing the burden of caregiving for caregivers.

[0003] In order to make the absorbent product fit better with the user and avoid leakage problems, the waistline, as an important component of the absorbent product fastening structure, is a relatively special existence. On the one hand, in order to improve stability, waistline products usually need better shrinkage performance. However, infants and young children's skin is relatively delicate and easily damaged. An overly tight waistline can easily cause redness, swelling, and even damage to infants and young children's skin. On the other hand, the waistline structure needs to ensure breathability, so a breathable structure is generally used to prepare the main body. However, a simple breathable material may cause liquid to leak from the waist.

[0004] In the existing technology, in response to the above situation, many manufacturers have taken the initiative to propose a variety of breathable, soft, and close-fitting waist structures. For example, the contact area of the waist is increased while increasing the contraction force, the pressure on the waist is reduced to increase the softness of the waist, and the breathable PE membrane structure is added to simultaneously improve the breathability and waterproof performance. For example, the existing bubble waist structure design is an example of the organic integration of the above structures.

[0005] However, generally speaking, for products that fully consider the above-mentioned properties, in order to ensure stability in the waist structure, it is usually necessary to use elastic hot melt adhesive and take into account both elastomers and adhesives as solutions. In this way, the waist part will occupy a certain amount of viscose, which will increase the overall weight of the absorbent product as a whole. If ultrasonic adhesion structures are directly used in large quantities, then the connection effect of simple ultrasonic connection may not reach the normal level of elastic adhesive for the above-mentioned more complex waist structure, resulting in insufficient structural stability of the absorbent product and affecting the care effect of infants and young children. Therefore, it is necessary to optimize and upgrade the above-mentioned existing technologies to ensure the original comfort while improving the lightness of the waist structure. Summary of the Invention

[0006] In response to the technical deficiencies in the background art, the present invention proposes a process for manufacturing an array elastic waist pants-type infant absorbent product using ultrasonic welding of hot air non-woven fabrics, which solves the above-mentioned technical problems and meets practical needs. The specific technical solution is as follows:

[0007] A process for manufacturing an array elastic waist pants-type baby absorbent product using ultrasonic welding of hot air non-woven fabrics, comprising the following steps:

[0008] A) preparing a waist base layer, preparing a hot air nonwoven fabric on a gauze curtain having an array of protruding points, so that the hot air nonwoven fabric has a plurality of protruding connecting portions arranged in an array on its surface during curing and forming, thereby forming the waist base layer;

[0009] B) assembling elastic bodies, while keeping the waist base layer prepared in step A flat, uniformly connecting a plurality of strips of elastic bodies having a contracted length less than the length of the waist base layer along the length direction of the waist base layer;

[0010] C) Laminating the PE film layer, keeping the waist base layer treated in step B flat, covering the waist base layer with the PE film layer, and then tightly laminating the PE film layer to the protruding connection portion by ultrasonic lamination;

[0011] D) Prepare the waist cover: prepare another piece of non-woven fabric with an area at least three times that of the waist base layer and a length not less than that of the waist base layer as the waist cover, and fold it along parallel lines no more than 1 / 3 of the width;

[0012] E) Laminating the waistband itself: the waistband base layer laminated with the PE film layer in step C is kept flat and placed into the crease of the waistband surface layer folded in step D. The shorter edge of the folded waistband surface layer, the waistband base layer, the PE film layer, and the corresponding position of the longer side of the fold are tightly laminated by ultrasonic lamination;

[0013] F) forming the elastic space around the waist: keeping the waist base layer treated in step E flat, a plurality of ultrasonic composite connecting tapes are laminated perpendicular to the direction of the elastic strips at equal intervals and without overlapping with the protruding connecting portions, thereby dividing the non-woven fabric space between the elastic strips into a plurality of elastic spaces, and forming a waist unit having a free skirt structure formed by the longer side area remaining at the fold;

[0014] G) preparing the main body of the absorbent article, and sequentially and tightly combining at least the bottom layer, the core layer, and the surface layer to form the main body of the absorbent article;

[0015] H) Assemble the waist unit to the main body of the absorbent product, and laminate the skirt structure of the waist unit treated in step F together with the position of ultrasonic lamination in step E to the end edge of the absorbent product main body in the longitudinal direction. After folding the absorbent product main body in half along the longitudinal direction, connect the two ends of the waist unit in the longitudinal direction to complete the assembly of the absorbent product.

[0016] The beneficial effects of the present invention are as follows: the ultrasonic connection structure is widely adopted as the main implementation form of waist assembly connection, which reduces the use of viscose, helps to reduce the weight of absorbent products and improve their lightness, and, in view of the characteristics of ultrasonic connection, a non-woven fabric matching structure is adopted as an auxiliary method to strengthen the ultrasonic connection structure. Under the premise of ensuring that the waist structure is breathable, light and comfortable, the overall structure will not have obvious differences in use compared with existing elastic rubber waist products, so it is suitable for use by infants and young children. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the processing method of steps A to C of the production process of the present invention.

[0018] Figure 2 Schematic diagram of the post-processing state of steps A to E of the manufacturing process of the present invention.

[0019] Figure 3 Schematic diagram of the post-processing state of steps A to H of the manufacturing process of the present invention Figure 1 .

[0020] Figure 4 Schematic diagram of the post-processing state of steps A to H of the manufacturing process of the present invention Figure 2 .

[0021] Among them: gauze curtain 1, array convex points 10, waist base layer 2, protruding connecting part 20, strip elastic body 3, PE film layer 4, waist surface layer 5, skirt structure 50, ultrasonic composite connecting belt 6, elastic space 7, waist monomer A, absorbent product body 8, bottom layer 80, core body 81, surface layer 82, guide layer 83, anti-side leakage partition 84. DETAILED DESCRIPTION

[0022] The following describes the implementation of the present invention in conjunction with the accompanying drawings and relevant embodiments. The implementation of the present invention is not limited to the following embodiments, and the present invention relates to the relevant necessary components in this technical field, which should be regarded as the common knowledge in this technical field and can be known and mastered by technical personnel in this technical field.

[0023] Reference Figures 1 to 4As shown, a process for manufacturing an array elastic waist pants-type baby absorbent product using ultrasonic welding of hot air non-woven fabrics is composed of the following steps:

[0024] A) preparing a waist base layer 2, preparing a hot air nonwoven fabric on a gauze curtain 1 having an array of protruding dots 10, so that the hot air nonwoven fabric has an array of protruding connecting portions 20 arranged on its surface during curing and forming, thereby forming the waist base layer 2;

[0025] Combine Figure 1 As shown, in this step, the hot air non-woven fabric structure serving as the waist base layer 2 is the central core part of the elastic waist component, which is the basis of the subsequent elastic cavity and elastic contraction force. In order to allow the elastic cavity to be naturally formed, the waist base layer 2 formed by the hot air non-woven fabric serving as the base of the elastic cavity is formed by a gauze curtain with array protrusions 10 during the forming process. Specifically, when several fine polymer fiber filaments are stacked on the gauze curtain, many parts will be lifted up by the array protrusions 10, and then when the hot air non-woven fabric is shaped, it will have several protruding connection parts for subsequent connection in its natural state.

[0026] B) assembling elastic bodies, while keeping the waist base layer 2 prepared in step A flat, uniformly connecting a plurality of strips of elastic bodies 3 having a contracted length less than the length of the waist base layer 2 along the length direction of the waist base layer 2;

[0027] Combine Figure 1 As shown, in this step, when compounding the strip elastic body 3, the strip elastic body 3 is preferably an elastic wire or a slightly thicker elastic line. Specifically, if the diameter of the material selected as the elastic wire is less than 1 mm, the elastic line can be more than 1 mm. During the compounding process, the strip elastic body 3 needs to maintain a stretched state and compound with the waist base layer 2. In a further preferred case, in the rectangular area between any four adjacent protruding connecting parts 20, the stretching ratio of the strip elastic body 3 decreases from the edge to the center. In this way, when it naturally shrinks into the elastic space 7 later, the setting characteristics of the above-mentioned strip elastic body 3 can make the forming effect of the elastic space 7 more natural and the deformation recovery ability after force is better, especially the edge of the elastic space 7 forms wrinkles around the elastic space 7 because of the tightened strip elastic body 3, so the shape of the elastic space 7 is more stable, and a better elastic buffering effect is achieved.

[0028] C) Laminating the PE film layer 4, keeping the waist base layer 2 treated in step B flat, covering the waist base layer 2 with the PE film layer 4, and then tightly laminating the PE film layer 4 to the protruding connecting portion 20 by ultrasonic lamination;

[0029] Combine Figure 1As shown, this step is a key step before forming the elastic space 7. Through this step, the PE film layer 7 can be wrapped in the inner cavity of the elastic space 7, and with the contraction of the strip elastic body 3, the elastic space 7 is naturally formed to fit more closely to the inner wall of the elastic space 7, thereby reducing the occupation of the free area of the inner cavity of the elastic space 7. In the subsequent leakage prevention and ventilation, it plays a good role in isolating moisture, reducing close contact with moisture, and improving ventilation efficiency.

[0030] D) preparing a waist surface layer 5 by preparing another piece of non-woven fabric having an area at least three times that of the waist base layer 2 and a length not less than that of the waist base layer 2 as the waist surface layer 5, and folding the non-woven fabric along parallel lines at a position not exceeding 1 / 3 in the width direction;

[0031] Combine Figure 1 and Figure 2 As shown, in this step, the type of non-woven fabric used for the waist surface layer 5 can be adaptively selected according to the material type or technical characteristics actually owned by the manufacturer, and basically needs to meet the requirement of not being easily broken. During compounding, refer to the contents described in the steps and fold a portion not exceeding 1 / 3 of the width. The function of this portion is to accommodate the waist base layer 2, so that after the waist surface layer 5 is folded and wrapped around the waist base layer 2, there is still sufficient length to form the skirt structure 50 required subsequently, and at the same time provide sufficient ultrasonic compounding area for the shorter side fold to ensure that the waist monomer A has sufficient structural strength after the subsequent process is completed and the combination is completed. At the same time, it is convenient for the waist monomer A to meet the needs of the manufacturer's development, so that the skirt structure 50 can selectively become a skirt, or be further folded and compounded to serve as other storage or padding structures of the absorbent product, which is very convenient and flexible.

[0032] Furthermore, under the wrapping effect of the waist surface layer 5, on the one hand, the binding force exerted by the elastic waist on the user's skin when the absorbent product is worn can be reduced; on the other hand, the waist base layer 2 arranged on the inner side is provided with a good initial water absorption barrier and protection, so that the elastic space 7 formed by the inner waist base layer 2 is less likely to be damaged by external forces. The elastic space 7 thus obtains a good molding effect, and a buffer space can be further formed between the waist base layer 2 and the waist surface layer 5, which can in turn allow the overall stable structure to act on the waist surface layer 5, so that the waist unit is not only structurally stable, but also can provide a better buffering and leakage-proof effect.

[0033] E) Laminating the waistband itself: the waistband base layer 2, which has been laminated with the PE film layer 4 in step C, is kept flat and placed into the fold of the waistband surface layer 5 folded in step D. The shorter edge of the folded waistband surface layer 5, the waistband base layer 2, and the PE film layer 4 corresponding to the longer edge of the fold are tightly laminated by ultrasonic lamination;

[0034] Combine Figure 1 and Figure 2 As shown, this step is an extension of the above-mentioned step D, and is the last step of wrapping the combined waist monomer A. After the above-mentioned steps are completed, the structural strength of the waist monomer A itself can be guaranteed. Since it is in a flattened state, although the strip elastic body 3 still has elastic deformation ability, it cannot shrink naturally. The process from step B to step E continues to remain flat. On the one hand, it is helpful to the stability of the processing, so that the relative positions of the various formed protruding connecting parts 20 remain unchanged, and the ultrasonic compounding can use the surface contact to adapt the point contact method, so that each protruding connecting part 20 becomes the necessary connection point of the elastic space 7, reducing the positioning difficulty of subsequent processing equipment. At the same time, the whole process can ensure the isotropic consistency of the fiber structure of the waist base layer 2 and the waist surface layer 5, so that the qualified rate of the final naturally shrunken finished product can be improved.

[0035] F) Forming the elastic waist space: Keeping the waist base layer 2 treated in step E flat, a plurality of ultrasonic composite connecting tapes 6 are laminated perpendicular to the direction of the elastic strips 3 at equal intervals and without overlapping with the protruding connecting portions 20, thereby dividing the non-woven fabric space between the elastic strips 3 into a plurality of elastic spaces 7, thereby forming a waist unit A with the longer side remaining at the fold forming a free skirt structure 50;

[0036] Combine Figures 1 to 3 As shown, in this step, the tension applied to the waist base layer 2 and the waist surface layer 5 is actually released, allowing them to shrink naturally, and then allowing the elastic space 7 to be evenly formed stably by the joint limit of the ultrasonic point positions formed by each protruding connection part 20 and the ultrasonic composite connecting belt 6 arranged on one side of each column of protruding connection parts, and ensuring the structural strength of the entire waist monomer A, which is convenient for subsequent processing operations.

[0037] G) preparing the absorbent article body 8, by sequentially and tightly compounding at least a bottom layer 80, a core 81, and a surface layer 82 to form the absorbent article body 8;

[0038] Reference Figure 3 As shown, in this step, the structure of the absorbent product main body 8 can be further expanded and extended on the basis of the above basic components, and the manufacturer can make adaptive settings as needed. The present invention does not make further expansion and limitations on this.

[0039] H) Assemble the waist unit A to the absorbent product body 8, and compound the skirt structure 50 of the waist unit A treated in step F together with the position of ultrasonic compounding in step E with the end edge of the absorbent product body 8 in the longitudinal direction. After folding the absorbent product body 8 in half along the longitudinal direction, connect the two ends of the waist unit A in the longitudinal direction to complete the assembly of the absorbent product.

[0040] Combine Figures 1 to 4 As shown, in this step, similarly to the previous step G, the manufacturer makes adaptive adjustments based on the structure of the absorbent product body 8 selected by it, so that it can adapt to the structure of the waist unit A, and can be adaptively set as needed. The present invention does not make further expansion and limitations on this.

[0041] Reference Figure 4 As shown, as one of the preferred embodiments of the present invention, in the step A, the spacing between the protruding connecting parts 20 arranged on the surface of the hot air non-woven fabric in the array is greater along the length direction of the waist base layer 2 than along the width direction of the waist base layer 2.

[0042] In this embodiment, the waist base layer 2 formed is compared with the basic structure of the uniformly formed protruding connecting part 20, and the shape of the elastic space 7 tends to be long and strip-shaped, and the direction is consistent with the overall direction of the elastic waist and the direction of the strip elastic body 3. Therefore, the arch of the elastic space 7 finally formed is more obvious and natural, and the elastic waist is softer when it fits the user's skin.

[0043] As one of the preferred embodiments of the present invention, in step B, the contracted length of the strip elastic body 3 is 0.75-0.85 times that of the waist base layer 2, and the composite area with the waist base layer does not overlap with any protruding connecting portion 20.

[0044] In this embodiment, the shrinkage ratio of the above-mentioned strip elastic body 3 can make the elastic space 7 have a better molding effect during molding. If the shrinkage ratio is too large, the elastic space 7 is very likely to collapse when the processing accuracy is poor. If the shrinkage ratio is too small, the elastic space 7 is not easy to mold. The above-mentioned shrinkage ratio can keep the final elastic space 7 stable and provide the necessary elastic cushioning, breathable and liquid-absorbing technical effects.

[0045] As one of the preferred embodiments of the present invention, in the step D, the density of the non-woven fabric used as the waist surface layer 5 is 0.80-0.90 times that of the non-woven fabric used as the waist base layer.

[0046] In the above embodiment, the density of the non-woven fabric of the waist surface layer 5 refers to the density of the selected polymer material on the one hand, and on the other hand, it can further limit the size of the gaps in the formed non-woven fabric, so that its looseness is also 0.80-0.90 times that of the non-woven fabric serving as the waist base layer. In this way, while the ventilation and breathability of the waist monomer A is guaranteed, the liquid is not easy to stay in the waist surface layer 5, but further penetrates to the PE film layer 4, and finally flows along the PE film layer 4 toward the core structure, reducing the dampness of the waist structure.

[0047] As one of the preferred embodiments of the present invention, in step E, the width of the ultrasonic composite area where the edge of the shorter side of the folded waist surface layer 5, the waist base layer 2, the PE film layer 4 and the corresponding position of the longer side of the folded waist surface layer 5 are tightly composited is not greater than 1 / 5 of the width of the shorter side of the folded waist base layer 2. At the same time, the width of the longer side of the folded waist base layer 2 does not exceed 3 / 5 of the total width of the waist base layer 2.

[0048] In the above embodiment, step E is further limited. In the waist unit A formed by the size characteristics, the skirt structure 50 has the highest redundancy, and the composite stability of the folded edge of the waist unit A can also be guaranteed to a certain extent. The redundant skirt structure 50 can better adapt to more types of waist unit A assembly styles.

[0049] Reference Figure 4 As shown, as one of the preferred embodiments of the present invention, in the step F, the ultrasonic composite connecting belt 6 is symmetrical to the same row of protruding connecting parts 20 parallel to the width direction of the waist base layer 2, and is arranged at positions close to both sides of the row of protruding connecting parts 20.

[0050] In the above embodiment, the ultrasonic composite connecting belt 6 is further limited to be arranged symmetrically on both sides of the same column of protruding connecting parts 20. The most important function is to allow the elastic spaces 7 in the same column to be stably arranged around the length direction of the waist. Once the protruding connecting part 20 at a certain point falls off, it only merges the two small elastic spaces 7 into one large elastic space 7. Although the elastic buffering capacity of the elastic space 7 will be reduced, the softness will not be reduced, and it can still provide relatively sufficient air permeability, leakage resistance and spatial deformation capabilities.

[0051] As one of the preferred embodiments of the present invention, in the step H, after the free side of the skirt structure 50 is folded again to form a pocket-shaped body, the ultrasonic composite part of the shorter side of the folded part of the waistline monomer, the main body of the skirt structure 50, and the edge of the pocket-shaped body of the skirt structure 50 are composited with the absorbent product while keeping the pocket-shaped body in a bulging state.

[0052] In this embodiment, the skirt structure 50 is actually formed into an annular cavity surrounding the waist of the absorbent product, which is a further utilization of the skirt structure 50. The annular cavity formed is a protective structure for the outer area of the waist of the absorbent product when it is not opened. Once the structure is further processed into an opening structure, the skirt structure 50 can also form a pocket-shaped body, so that the user can place structures such as a hot pack or a water-absorbing pad therein, thereby improving the comprehensive performance of the absorbent product.

[0053] Combine Figure 3 and Figure 4As shown, as one of the preferred embodiments of the present invention, the absorbent product also includes a guide layer 83 arranged between the surface layer 82 and the core body 81, and an anti-side leakage partition 84 arranged at the edge of the length direction composite portion of the surface layer 82 and the bottom layer 80, and both ends of the length direction of the anti-side leakage partition 84 are buried in the ultrasonic composite portion of the waist unit A and the absorbent product main body 8.

[0054] In this embodiment, in order to further define the structure of the absorbent product main body 8, the most important point is to add a connecting composite structure between the side leakage edge 84 and the waist monomer A structure, so that the overall structure of the absorbent product finally formed is stable, and the overall structure can provide good support for the elastic waist structure.

[0055] Overall, the ultrasonic connection structure widely adopted in the present invention is the main implementation form of the waistband assembly connection, which reduces the use of viscose, helps to reduce the weight of the absorbent product and improve its lightness. In addition, in view of the characteristics of ultrasonic connection, a non-woven fabric matching structure is adopted as an auxiliary method to strengthen the ultrasonic connection structure. Under the premise of ensuring that the waistband structure is breathable, light and comfortable, the overall structure will not have obvious differences compared with the existing elastic rubber waistband products during use, so it is suitable for use by infants and young children.

[0056] The above description is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A process for manufacturing an array elastic waist pants-type baby absorbent product using ultrasonic welding of hot air non-woven fabrics, characterized in that: It consists of the following steps: A) preparing a waist base layer, preparing a hot air nonwoven fabric on a gauze curtain having an array of protruding points, so that the hot air nonwoven fabric has a plurality of protruding connecting portions arranged in an array on its surface during curing and forming, thereby forming the waist base layer; B) assembling elastic bodies, while keeping the waist base layer prepared in step A flat, uniformly connecting a plurality of strips of elastic bodies having a contracted length less than the length of the waist base layer along the length direction of the waist base layer; C) Laminating the PE film layer, keeping the waist base layer treated in step B flat, covering the waist base layer with the PE film layer, and then tightly laminating the PE film layer to the protruding connection portion by ultrasonic lamination; D) Prepare the waist cover: prepare another piece of non-woven fabric with an area at least three times that of the waist base layer and a length not less than that of the waist base layer as the waist cover, and fold it along parallel lines no more than 1 / 3 of the width; E) Laminating the waistband itself: the waistband base layer laminated with the PE film layer in step C is kept flat and placed into the crease of the waistband surface layer folded in step D. The shorter edge of the folded waistband surface layer, the waistband base layer, the PE film layer, and the corresponding position of the longer side of the fold are tightly laminated by ultrasonic lamination; F) forming the elastic space around the waist: keeping the waist base layer treated in step E flat, a plurality of ultrasonic composite connecting tapes are laminated perpendicular to the direction of the elastic strips at equal intervals and without overlapping with the protruding connecting portions, thereby dividing the non-woven fabric space between the elastic strips into a plurality of elastic spaces, and forming a waist unit having a free skirt structure formed by the longer side area remaining at the fold; G) preparing the main body of the absorbent article, and sequentially and tightly combining at least the bottom layer, the core layer, and the surface layer to form the main body of the absorbent article; H) Assemble the waist unit to the main body of the absorbent product, and laminate the skirt structure of the waist unit treated in step F together with the position of ultrasonic lamination in step E to the end edge of the absorbent product main body in the longitudinal direction. After folding the absorbent product main body in half along the longitudinal direction, connect the two ends of the waist unit in the longitudinal direction to complete the assembly of the absorbent product.

2. The process for manufacturing an array elastic waist pants-type infant absorbent product using ultrasonically welded hot air non-woven fabric according to claim 1, characterized in that: In the step A, the spacing between the protruding connecting parts of the array arranged on the surface of the hot air non-woven fabric is greater along the length direction of the waist base layer than along the width direction of the waist base layer.

3. The process for producing an array elastic waist pants-type infant absorbent product using ultrasonically welded hot air nonwoven fabric according to claim 1 or 2, characterized in that: In the step B, the contracted length of the strip elastic body is 0.75-0.85 times that of the waist base layer, and the composite area with the waist base layer does not overlap with any protruding connection portion.

4. The process for manufacturing an array elastic waist pants-type infant absorbent product using ultrasonically welded hot air nonwoven fabric according to claim 1, characterized in that: In the step D, the density of the non-woven fabric used as the waist surface layer is 0.80-0.90 times that of the non-woven fabric used as the waist base layer.

5. The process for manufacturing an array elastic waist pants-type infant absorbent product using ultrasonically welded hot air non-woven fabric according to claim 1, characterized in that: In the step E, the width of the ultrasonic compounding area where the edge of the shorter side of the folded waist surface layer, the waist base layer, the PE film layer and the corresponding position of the longer side of the folded waist layer are tightly compounded is no more than 1 / 5 of the width of the shorter side of the folded waist base layer. At the same time, the width of the longer side of the folded waist base layer does not exceed 3 / 5 of the total width of the waist base layer.

6. The process for manufacturing an array elastic waist pants-type infant absorbent product using ultrasonically welded hot air nonwoven fabrics according to claim 2, characterized in that: In the step F, the ultrasonic composite connecting belt is symmetrical to the same row of protruding connecting parts parallel to the width direction of the waist base layer and is arranged at positions close to both sides of the row of protruding connecting parts.

7. The process for manufacturing an array elastic waist pants-type infant absorbent product using ultrasonically welded hot air nonwoven fabrics according to claim 1, characterized in that: In the step H, after the free side of the skirt structure is folded again to form a pocket-shaped body, the ultrasonic composite part of the shorter side of the folded part of the waist unit, the main body of the skirt structure, and the edge of the pocket-shaped body of the skirt structure are composited with the absorbent product while keeping the pocket-shaped body in a bulging state.

8. The process for manufacturing an array elastic waist pants-type infant absorbent product using ultrasonically welded hot air nonwoven fabrics according to claim 1, characterized in that: The absorbent product also includes a guide layer arranged between the surface layer and the core body, and an anti-side leakage partition arranged at the edge of the composite portion of the surface layer and the bottom layer in the length direction. Both ends of the anti-side leakage partition in the length direction are buried in the ultrasonic composite portion of the waist unit and the absorbent product body.

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