A type of nylon-ammonia waistband baby diaper

Abstract

This invention provides a nylon-spandex waistband baby diaper, featuring comfort, breathability, simplified manufacturing process, and enhanced safety. The waistband is made of a single layer of nylon-spandex fabric, significantly improving moisture absorption and wicking capacity, as well as skin-friendliness, effectively preventing skin allergies in the baby's waist and abdomen. Simultaneously, it eliminates the need for the hot melt adhesive bonding process required in traditional non-woven fabric and spandex bonding, simplifying the production process and eliminating the risk of allergies caused by adhesives, further enhancing the overall comfort and usability of the product.

Description

Technical Field

[0001] This utility model relates to the field of diaper technology, and in particular to a nylon-spandex waistband baby diaper. Background Technology

[0002] In the field of baby care products, diapers, as an essential daily item, have always received widespread attention regarding their comfort, safety, and manufacturing process. Traditional baby diapers typically use a combination of non-woven fabric and spandex to create the waistband, achieving a certain degree of elasticity and fit. This structure was initially designed with cost control and basic functionality in mind. Non-woven fabric is widely used due to its lightweight, ease of processing, and lower cost, while spandex provides the necessary stretch recovery properties, allowing the waistband to adapt to different baby sizes and ensuring the diaper doesn't easily slip off during use.

[0003] However, as users' demands for baby care products continue to rise, this traditional structure has gradually revealed several shortcomings. First, the waistband material, composed of non-woven fabric and spandex, lacks moisture-wicking properties, easily accumulating sweat during use and causing localized dampness. Prolonged contact with the baby's skin may lead to stuffiness and discomfort, and even trigger skin problems such as rashes and allergies. Second, the surface of non-woven fabric is relatively rough and has poor skin-friendliness, especially for newborns with delicate skin; direct friction may exacerbate skin sensitivity. Furthermore, in terms of manufacturing processes, existing waistbands typically require hot melt adhesive to bond spandex between two layers of non-woven fabric. This process is not only complex and energy-intensive, but the use of hot melt adhesive also introduces new allergens. Some infants are allergic to the chemical adhesive components, further increasing the risk of skin discomfort.

[0004] In summary, existing baby diapers suffer from significant material functional deficiencies and manufacturing defects in the waistband area, directly impacting product safety and comfort. Therefore, there is an urgent need in this field for a novel baby diaper waistband structure that can significantly improve breathability, absorbency, and skin-friendliness while maintaining good fit and elasticity, while simplifying the manufacturing process and avoiding the use of allergenic materials, thereby better meeting the health and comfort needs of infants and young children. Utility Model Content

[0005] The purpose of this invention is to provide a nylon-ammonia waistband baby diaper to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] This utility model provides a nylon-spandex waistband baby diaper, including a front waistband area, a back waistband area, and a crotch area for connecting the front waistband area and the back waistband area. An absorbent core structure is provided in the crotch area. The front waistband area is a front nylon-spandex waistband, and the back waistband area is a back nylon-spandex waistband. Both the front and back nylon-spandex waistbands are made of single-layer nylon-spandex fabric.

[0008] Both sides of the front nylon-spandex waistband and the rear nylon-spandex waistband are provided with a first side edge and a second side edge. The first side edge of the front nylon-spandex waistband and the first side edge of the rear nylon-spandex waistband are fixedly connected to each other, and the second side edge of the front nylon-spandex waistband and the second side edge of the rear nylon-spandex waistband are fixedly connected to each other, thereby forming a ring-shaped waist opening and two leg openings.

[0009] The absorbent core structure is a diaper absorbent body, which is fixed between the front nylon waistband and the rear nylon waistband. The diaper absorbent body has a first end and a second end. The first end is fixedly connected to the inner surface of the front nylon waistband, and the second end is fixedly connected to the inner surface of the rear nylon waistband.

[0010] Preferably, the weight of the front nylon-spandex waistband and the rear nylon-spandex waistband is 80-120 g / m². 2 .

[0011] Preferably, the elasticity ratio of the front nylon waistband and the rear nylon waistband is 1.5-2 times.

[0012] Preferably, the first end is connected to the front nylon-spandex waistband, and the second end is connected to the rear nylon-spandex waistband by a hot melt adhesive layer.

[0013] Preferably, the first side edge and the second side edge are connected by a nylon-ammonia waistband ultrasonic composite part.

[0014] Preferably, the nylon-ammonia waistband ultrasonic composite part has a strip-shaped structure, and the width of the nylon-ammonia waistband ultrasonic composite part is 3-10mm.

[0015] Preferably, the upper edge of the waist opening of both the front nylon-spandex waistband and the rear nylon-spandex waistband is laminated with spandex yarn.

[0016] Preferably, the number of spandex yarns in the waist section is 3-6.

[0017] The present invention achieves the following beneficial technical effects compared to the prior art:

[0018] This utility model provides a nylon-spandex waistband baby diaper, which features comfort, breathability, simplified manufacturing process, and enhanced safety. Specifically, the waistband is made of a single layer of nylon-spandex fabric, significantly improving moisture absorption and wicking capacity, as well as skin-friendliness, effectively preventing skin allergies in the baby's waist and abdomen. Furthermore, it eliminates the need for the hot melt adhesive bonding process required in traditional non-woven fabric and spandex bonding, simplifying the production process and eliminating the risk of allergies caused by adhesives, further enhancing the overall comfort and usability of the product. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the nylon-spandex waistband baby diaper provided by this utility model;

[0021] Figure 2 A schematic diagram of the unfolded nylon-spandex waistband baby diaper provided by this utility model;

[0022] In the diagram: 1: Front nylon-spandex waistband, 2: Back nylon-spandex waistband, 3: Absorbent pad, 4: Diaper composite section, 5: Ultrasonic composite section of nylon-spandex waistband, 6: Spandex yarn at the waist. Detailed Implementation

[0023] The serial numbers assigned to components in this document, such as "first," "second," etc., are merely used to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] The purpose of this invention is to provide a nylon-spandex waistband baby diaper to solve the problems existing in the prior art.

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Example 1:

[0029] This embodiment provides a nylon-spandex waistband baby diaper, for reference. Figure 1 , Figure 2 This embodiment of the nylon-spandex waistband baby diaper includes a front nylon-spandex waistband 1, a rear nylon-spandex waistband 2, a diaper absorbent body 3, and a diaper composite part 4 and a nylon-spandex waistband ultrasonic composite part 5 that connect the three together. Both the front nylon-spandex waistband 1 and the rear nylon-spandex waistband 2 are single-layer nylon-spandex fabrics, forming a long strip. 3-6 spandex filaments 6 are longitudinally spaced along the upper edge of the waist opening, giving the waistband an elasticity ratio of 1.5-2 times. The lower edge of the waist opening and the left and right side edges are ultrasonically welded together via the nylon-spandex waistband ultrasonic composite part 5 to form a ring-shaped waist opening and a pair of leg openings. The diaper absorbent body 3 is bonded to the inner surfaces of the front nylon-spandex waistband 1 and the rear nylon-spandex waistband 2 respectively via the diaper composite part 4 using hot melt adhesive, forming an "H"-shaped unfolded plane. When worn, it is folded into a "U" shape to cover the baby's lower body.

[0030] As one implementation method, the nylon-spandex fabric in this embodiment is a weft-knitted high-elastic double-sided fabric of 82% nylon and 18% spandex, with a basis weight of 80-120 g / m². 2This ensures sufficient elasticity while maintaining excellent breathability and moisture-wicking properties. Nylon fibers possess excellent capillary action, quickly wicking away sweat from the skin and spreading it to the outer layer of the fabric; the spandex component provides 1.5-2 times the instantaneous recovery elasticity, ensuring the diaper stays in place and doesn't slip when the baby rolls or crawls. The nylon-spandex fabric surface is treated with a 40℃ weakly acidic enzyme wash, resulting in Ra≤2.5 μm, significantly reducing the coefficient of friction and improving skin-friendliness.

[0031] In one embodiment, the spandex yarn used in the waist section is a 420 dtex low-temperature hot-melt coated spandex yarn, which is heat-resistant up to 110℃. It is dyed in the same bath as the nylon-spandex fabric, resulting in stable color and no migration. The spandex yarn is fed in at a draw ratio of 0.8-1.2 times using a tension control device and then ultrasonically welded to the inner surface of the nylon-spandex fabric, forming a 3-10 mm wide composite strip. This prevents slippage and reduces pressure marks.

[0032] In one implementation method, the ultrasonic welding in this embodiment uses a 20 kHz continuous roll welding method, with a welding head temperature of 120-140℃, a pressure of 0.25-0.35 MPa, and a welding time of 0.2-0.4 s / cm. The ultrasonic energy causes the nylon fiber to partially melt and crosslink with the spandex filament, resulting in a weld tensile strength ≥15 N / 25 mm, with no colloid residue, completely eliminating the risk of allergic reactions to hot melt adhesive.

[0033] In one embodiment, the absorbent pad in this example consists of, from top to bottom, a surface non-woven fabric, a diversion layer, a composite core, and a breathable bottom membrane. The composite core is made by uniformly mixing superabsorbent polymer (SAP) and fluff pulp at a mass ratio of 60:40, with a liquid absorption capacity of ≥400 g / m². 2 The absorbent core of the diaper is bonded to the inner surface of the front and back nylon waistbands at both ends using a spiral hot melt adhesive spraying process. The amount of adhesive is controlled at 2-4 g / m², which ensures a firm bond while preventing the adhesive from penetrating the surface.

[0034] As one implementation method, the diaper composite part in this embodiment has an "Ω"-shaped discontinuous dot adhesive structure with adhesive dots of 0.8-1.2 mm in diameter and 3-5 mm in spacing, balancing softness and peel strength; the adhesive is a styrene-isoprene-styrene (SIS) block copolymer hot melt adhesive, which has extremely low skin irritation and meets the requirements of the skin sensitization test in the Chinese Pharmacopoeia.

[0035] The method of using the nylon-spandex waistband baby diaper provided in this embodiment is as follows: The caregiver unfolds the diaper, places the baby's legs through the leg openings, pulls up the back nylon-spandex waistband 2 to fit snugly against the waist and back, then covers the abdomen with the front nylon-spandex waistband 1. The diaper is then attached to the re-adhesive area on the outer surface of the front nylon-spandex waistband 1 using Velcro or tape, and adjusted to a comfortable tightness. Because the nylon-spandex fabric has 360° elasticity, the diaper automatically conforms to the baby's position, preventing side leakage and marks.

[0036] It should be noted that the spandex yarn 6 in the waistband of Example 1 can be replaced with a flat spandex belt, 5-8 mm wide, to further distribute pressure; the weight of the nylon-spandex fabric can be designed in a gradient manner, slightly thicker at the front and slightly thinner at the back, to achieve differentiated functions of front support and rear breathability; the absorbent diaper 3 and the front and rear nylon-spandex waistbands can also be mechanically pressed or laser welded instead of hot melt adhesive to further reduce chemical residues. Any replacement structures that are equivalent to or obvious to this utility model should fall within the protection scope defined by the claims of this utility model.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments 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.

[0038] It should be noted that the components mentioned in the above embodiments are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0039] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A nylon-spandex waistband baby diaper, comprising a front waistband area, a back waistband area, and a crotch area for connecting the front waistband area and the back waistband area, wherein an absorbent core structure is provided in the crotch area; characterized in that, The front waist area is the front nylon-spandex waist (1), and the back waist area is the back nylon-spandex waist (2). Both the front nylon-spandex waist (1) and the back nylon-spandex waist (2) are made of single-layer nylon-spandex fabric. Both sides of the front nylon waistband (1) and the rear nylon waistband (2) are provided with a first side edge and a second side edge. The first side edge of the front nylon waistband (1) is fixedly connected to the first side edge of the rear nylon waistband (2), and the second side edge of the front nylon waistband (1) is fixedly connected to the second side edge of the rear nylon waistband (2), thereby forming a ring-shaped waist opening and two leg openings. The absorbent core structure is a diaper absorbent (3). The diaper absorbent (3) is fixed between the front nylon waistband (1) and the rear nylon waistband (2). The diaper absorbent (3) has a first end and a second end. The first end is fixedly connected to the inner surface of the front nylon waistband (1), and the second end is fixedly connected to the inner surface of the rear nylon waistband (2).

2. The spandex waist infant diaper paper according to claim 1, characterized in that, The front side brocade waistline (1) and the back side brocade waistline (2) have a grammage of 80-120 g / m 2 .

3. The baby diaper of claim 1, wherein the backsheet is made of a material selected from the group consisting of polyethylene, polypropylene, polyurethane, polyester, nylon, and a combination thereof. The elasticity ratio of the front nylon waistband (1) and the rear nylon waistband (2) is 1.5-2 times.

4. The nylon-spandex waistband baby diaper according to claim 1, characterized in that, The first end is connected to the front nylon waistband (1), and the second end is connected to the rear nylon waistband (2) by a hot melt adhesive layer.

5. The nylon-spandex waistband baby diaper according to claim 1, characterized in that, The first side edge and the second side edge are connected by a nylon waistband ultrasonic composite part (5).

6. The nylon-ammonia waistband baby diaper according to claim 5, characterized in that, The nylon-ammonia waistband ultrasonic composite part (5) has a strip-shaped structure, and the width of the nylon-ammonia waistband ultrasonic composite part (5) is 3-10mm.

7. The nylon-spandex waistband baby diaper according to claim 1, characterized in that, The upper edge of the waist opening of both the front nylon-spandex waistband (1) and the rear nylon-spandex waistband (2) is laminated with waist spandex yarn (6).

8. The nylon-ammonia waistband baby diaper according to claim 7, characterized in that, The number of spandex yarns (6) in the waist section is 3-6.

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