Low-gum segmented organ waist structure

Abstract

This utility model relates to the technical field of support or fixing devices for absorbent products, specifically disclosing a low-adhesion segmented accordion waistband structure. The waistband comprises an outer non-woven fabric layer, several parallel elastic threads, an inner non-woven fabric layer, and several intermittent adhesive application points that sequentially bond the three layers together. The waistband is divided into three adhesive zones along its length: left, middle, and right. Intermittent adhesive application points are symmetrically arranged in the left and right adhesive zones. The contraction of the elastic threads creates several pleats protruding towards the outer non-woven fabric between these intermittent adhesive application points. This utility model reduces the amount of adhesive applied. By utilizing a low-adhesion, intermittent distribution, the waistband is divided into multiple independent elastic segments. The connections between each segment are stable and flexible, not only reducing the area requiring continuous adhesive application and lowering production costs, but also significantly improving the breathability and wearing comfort of the waistband.

Description

Technical Field

[0001] This utility model relates to the technical field of support or fixing devices for absorbent products, and specifically discloses a low-adhesion segmented accordion waist structure. Background Technology

[0002] Currently, commercially available pant-style diapers typically use ultrasonic equipment to bond the inner and outer non-woven fabrics and distribute elastic spandex filaments during waistband production. This method requires significant hardware investment, and due to limitations in ultrasonic technology, production speed often cannot reach the equipment's maximum design speed. Furthermore, existing adhesive application processes involve a large amount of continuous adhesive, which not only increases production costs but also reduces breathability during wear, leading to a stuffy feeling. Additionally, it increases the risk of the diaper slipping off or leaving marks when the wearer is hungry or full.

[0003] Furthermore, considering the characteristics of the adhesive application amount, the improved solution adopts intermittent coating technology to reduce the amount of hot melt adhesive used. However, if the appropriate coating method cannot be precisely controlled, simply applying intermittent adhesive may increase the risk of the diaper product becoming loose and falling apart. Once the elastic threads are not properly secured in the necessary positions of the waistband structure, the user will clearly feel that the fit between the diaper and the body is no longer as tight and secure as when initially wearing it. The wearing area may even slip off from its intended position, resulting in impaired absorption and leak-proof capabilities of the diaper product, increasing inconvenience to the user. Therefore, there is still room for improvement in how to rationally plan intermittent adhesive application to achieve the required product stability while ensuring a low amount of adhesive. Utility Model Content

[0004] To address the technical deficiencies in the background technology, this utility model proposes a low-adhesion segmented accordion waist structure, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows:

[0005] A segmented accordion waistband with low adhesive content includes a waistband formed by an outer nonwoven fabric, several parallel elastic filaments, an inner nonwoven fabric, and several intermittent adhesive application points that sequentially bond the above three together. The waistband is divided along the width direction into a waist area that does not exceed 1 / 5 of its own width and the remaining part of the hip and abdomen area. The spacing of the elastic filaments in the waist area is less than the spacing of the elastic filaments in the hip and abdomen area.

[0006] The waist circumference is divided into three adhesive zones along its length: left adhesive zone, middle adhesive zone, and right adhesive zone. Intermittent adhesive application positions are symmetrically set in the left and right adhesive zones. The length of each intermittent adhesive application position in the waist circumference is d1 ≤ the distance between adjacent intermittent adhesive application positions in the same direction, d2. Through the shrinkage of the elastic yarn, several pleats protruding towards the outer nonwoven fabric are formed between the intermittent adhesive application positions, where d1 = 6.33-11.4 mm and d2 = 6.33-15 mm.

[0007] As a further technical solution of this utility model, along the waist width direction, the intermittent glue application position is interrupted only at the position where the elastic thread is set, or only at the position where the elastic thread is not set, so that the total width of all intermittent glue application positions in the waist width direction Σwn=24-51mm, and the width of a single intermittent glue application position wn=1-11.9mm.

[0008] As a further technical solution of this utility model, the density of the outer nonwoven fabric or the inner nonwoven fabric is 9-24 g / m³.

[0009] As a further technical solution of this utility model, the thickness of the elastic filament in the waist area is 210-720 dtex, the number is 3-11, and the width of the waist area is 10-25 mm.

[0010] Alternatively, the elastic filaments in the buttock and abdominal region have a thickness of 420-900 dtex, a quantity of 10-30, and a width of no more than 50 mm.

[0011] As a further technical solution of this utility model, the waist area is formed by intermittent composite points through hot melt adhesive or ultrasonic bonding, which sequentially bond the outer non-woven fabric, elastic yarn and inner non-woven fabric together. The length of the intermittent composite point in the waist length direction d3 is less than the length of the intermittent adhesive application point in the waist length direction d1, and the distance between adjacent intermittent composite points in the same direction d4 is less than the distance between adjacent intermittent adhesive application points in the same direction d2.

[0012] The beneficial effects of this invention are as follows: This invention aims to reduce the amount of adhesive applied, improve production efficiency, and ensure the comfort and fit of the product through a new design. The structure adopts a segmented approach, utilizing a low-adhesion, intermittent distribution to divide the waistband into multiple independent elastic segments. Each segment is stably and flexibly connected, forming accordion-like pleats. This not only reduces the area requiring continuous adhesive application and lowers production costs, but also significantly improves the breathability and wearing comfort of the waistband.

[0013] In addition, the segmented design allows the waistband to better adapt to changes in the wearer's body shape, maintaining a stable fit whether the stomach is empty or full, and avoiding slippage or marks. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the implementation effect of this utility model. Figure 1 .

[0015] Figure 2 This is a schematic cross-sectional view of the structure of this utility model.

[0016] Figure 3 This is a microscopic magnified schematic diagram of the wrinkling effect of the elastic yarn of this utility model.

[0017] Figure 4 This is a schematic diagram illustrating the implementation effect of this utility model. Figure 2 .

[0018] Figure 5 This is a schematic diagram illustrating the implementation effect of this utility model. Figure 3 .

[0019] Figure 6 This is a schematic diagram illustrating the implementation effect of this utility model. Figure 4 .

[0020] Figure 7 This is a supplementary illustration of the present invention.

[0021] Wherein: 1-outer nonwoven fabric; 2-elastic yarn; 3-inner nonwoven fabric; 4-intermittent adhesive application point; 5-waist area; 6-buttock and abdomen area; 7-left adhesive area; 8-middle adhesive area; 9-right adhesive area; 10-intermittent composite point. Detailed Implementation

[0022] The embodiments of this utility model will be described below with reference to the accompanying drawings and related examples. The embodiments of this utility model are not limited to the following examples, and this utility model relates to relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0023] comprehensive Figures 1 to 6 As shown, a low-adhesion segmented accordion waistband includes a waistband formed by an outer nonwoven fabric 1, several parallel elastic filaments 2, an inner nonwoven fabric 3, and several intermittent adhesive application points 4 that sequentially bond the above three together. Figure 2 As shown, in style one, the intermittent glue application position 4 can overlap with the elastic thread 2, while in style two, it can also not overlap with the elastic thread 2. The waist is divided along the width direction into a waist area 5 that does not exceed 1 / 5 of its own width and the remaining part of the hip and abdomen area 6. The spacing of the elastic threads 2 in the waist area 5 is less than the spacing of the elastic threads 2 in the hip and abdomen area 6.

[0024] Combination Figures 4 to 6As shown, the waist circumference is divided into three adhesive zones along its length: left adhesive zone, middle adhesive zone, and right adhesive zone. The left adhesive zone 7 and the right adhesive zone 9 are symmetrically set with intermittent adhesive application positions. The length d1 of the intermittent adhesive application position 4 in the waist circumference length direction is less than or equal to the distance d2 between adjacent intermittent adhesive application positions 4 in the same direction. Through the contraction of the elastic yarn 2, several pleats protruding towards the outer nonwoven fabric 1 are formed between the intermittent adhesive application positions 4, where d1 = 6.33-11.4 mm and d2 = 6.33-15 mm.

[0025] The waistband structure is divided into two zones with different spacing between the elastic fibers 2, and correspondingly, different spacing between the intermittent adhesive application positions 4 are also set. This allows the absorbent material to be stably fixed in the waist zone 5 while maintaining a close fit to the user's body shape in the hip and abdomen zone 6. The overall structure of this invention is simple. During processing, by controlling the adhesive application device to start and stop at an ultra-high frequency within a range of no more than 0.5 milliseconds, the effect of intermittent adhesive spraying can be achieved. After adhesive application is completed in the flattened state, the positions of the intermittent adhesive application positions 4 are set. The shrinkage length of the elastic fibers 2 must be less than the length of the un-adhesive portion. Figure 3 As shown, in this way, the elastic yarn 2 will shrink back to a taut state after the external force is removed, forming continuous inward and outward wrinkles in the uncoated area, reducing the area of ​​direct contact between the fabric, the elastic yarn 2, and the skin, forming a shape like... Figure 1 The intermittent organ style shown.

[0026] By applying adhesive in segments to the intermittent adhesive application point 4, different areas of the elastic yarn 2 provide different elastic shrinkage properties to the waistband while ensuring a low amount of adhesive. This creates different pleated accordion structures, which form channels for air to pass through, thus achieving the function of expelling humid air and exchanging fresh air. Both Style 1 and Style 2 can achieve similar effects. In Style 2, since the intermittent adhesive application point 4 is not on the elastic yarn 2 but adjacent to both sides in the width direction, it can prevent the elastic yarn 2 from shifting in the width direction, avoiding the problem of concentrated force on part of the skin coverage area and the formation of skin marks.

[0027] When d1≤d2 and the values ​​do not exceed the above range, a good balance can be achieved between the overall cost of gluing and the product performance level. This allows the product to achieve a low-investment, low-adhesion, flexible zoning adjustment, and high-speed production process when using the accordion waistband structure described in this utility model. The air exchange space is almost equal to the area of ​​the gluing area, so the overall breathability of the waistband structure is excellent. Furthermore, since there is almost no restriction on the elastic yarn 2 in Style 1 and Style 2, and it is only fixed at both ends of the waistband structure in the length direction when necessary, while the other positions are only fixed through the intermittent gluing position 4 and the intermittent composite point 10, the elastic yarn 2 structure is quite free. When the user wears it, the elastic yarn 2 will generate several accordion-shaped pleats on the waistband within its allowed range of movement, so that different users can obtain the required comfort.

[0028] Furthermore, the hip and abdomen area 6 can be further divided into an upper hip and abdomen area and a lower hip and abdomen area, making the waist structure form three different segments. The number of elastic threads 2 in the lower hip and abdomen area is greater than that in the upper hip and abdomen area, and the spacing between the elastic threads 2 is also similar, but both are greater than the spacing of the elastic threads in the waist area 5. After dividing the hip and abdomen area 6 into sections, it is convenient for manufacturers to further distinguish the angular parameters of the intermittent glue application position 4 in different sections, thereby making the waist more three-dimensionally covered and fixed, and improving the user's satisfaction with the wearing comfort of the absorbent products.

[0029] Reference Figure 5 In one preferred embodiment of this utility model, along the waist width direction, the intermittent adhesive application position 4 is interrupted only at the position where the elastic thread 2 is provided, or only at the position where the elastic thread 2 is not provided, so that the total width of all intermittent adhesive application positions 4 in the waist width direction Σwn=24-51mm, and the width of a single intermittent adhesive application position 4 wn=1-11.9mm. This embodiment is compared to... Figure 4 The pattern shown is further defined by distinguishing between continuous intermittent glue application positions 4 in the width direction (in this configuration, intermittent glue application position 4 and intermittent composite point position 10 are of the same structure), as shown in the figure. Figure 1 , Figure 4 and Figure 7 As shown, in this embodiment, the effect is equivalent to that of Style 1, while Figure 5 and Figure 6 This is equivalent to the effect of style two. The total width Σwn of the intermittent glue application position 4 mentioned above is basically no more than 1 / 2 of the waist width in most sizes of products, which can achieve the technical effect of low glue amount. If the size of the waist width is further restricted, better comfort and stability performance can be obtained.

[0030] In one preferred embodiment of this invention, the density of the outer nonwoven fabric 1 or the inner nonwoven fabric 3 is 9-24 g / m³. This density selection ensures both the material's lightness and sufficient strength and durability. Considering the close relationship between the density of nonwoven fabric and its physical properties, polymer materials such as polypropylene, polyester, or nylon were chosen. These materials not only possess excellent breathability and softness but also exhibit different strengths and abrasion resistance depending on the density. Especially when the density is 9-24 g / m³, these materials effectively prevent liquid penetration while maintaining wearing comfort and hygiene, making them ideal for manufacturing products such as waistbands that fit snugly against the skin.

[0031] Meanwhile, this density of nonwoven fabric also has excellent elastic recovery capabilities, allowing it to quickly return to its original state after being subjected to external force. This ensures that the waistband fits snugly against the body's curves during use, providing effective support and fixation. Furthermore, due to the material's lightweight nature, wearers will not experience significant pressure or discomfort even after prolonged wear, further enhancing the product's comfort and user experience.

[0032] In one preferred embodiment of this utility model, the elastic filaments 2 in the waist region 5 have a thickness of 210-720 dtex and a quantity of 3-11, and the width of the waist region 5 is 10-25 mm.

[0033] Alternatively, the elastic filaments 2 in the buttock and abdominal region 6 have a thickness of 420-900 dtex and a quantity of 10-30, and the width of the buttock and abdominal region 6 does not exceed 50 mm.

[0034] In practice, the elastic yarn 2 within the waist zone 5 is selected with a thickness of 210-720 dtex. Elastic yarns within this range provide suitable elastic recovery, ensuring the waistband adapts to the curves of different body types while maintaining stable support. The number of elastic yarns is controlled between 3 and 11, ensuring the waistband's elasticity while avoiding discomfort caused by excessive yarn. The width of the waist zone 5 is designed to be 10-25mm, ensuring a close fit without causing excessive tightness or constriction.

[0035] Within the hip and abdomen area 6, the elastic yarn 2 is selected with a thickness of 420-900 dtex. This thicker elastic yarn provides better support and shaping, especially suitable for the hip and abdomen areas that require stronger support. The number of elastic yarns is increased to 10-30 to enhance the elasticity and resilience of the hip and abdomen area, thereby better conforming to the body's curves and improving wearing comfort and shaping effect. The width of the hip and abdomen area 6 does not exceed 50mm. This design ensures both support and comfort and breathability.

[0036] Combination Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, in one preferred embodiment of this utility model, the waist region 5 is formed by intermittent composite points 10 through hot melt adhesive or ultrasonic bonding, whereby the outer nonwoven fabric 1, elastic yarn 2, and inner nonwoven fabric 3 are sequentially bonded together. (Referring to...) Figure 1 , Figure 4 and Figure 5 The figure shows that the length d3 of the intermittent composite point 10 is equal to the length d1 of the intermittent adhesive application point 4, while the reference... Figure 6 As shown, the length d3 of the intermittent composite point 10 in the waist length direction is less than the length d1 of the intermittent glue application point 4 in the waist length direction. Similarly, in the same direction, the distance d4 between adjacent intermittent composite points 10 is less than the distance d2 between adjacent intermittent glue application points 4 in the same direction.

[0037] This embodiment further defines the composite method of the elastic yarn 2 and the fabric structure in the waist area 5. In this position, the elastic yarn 2 is fixed by intermittent composite points 10. The intermittent composite points 10 can be ultrasonic or hot melt adhesive composite, which is also an intermittent composite form. Since the overall size of the intermittent composite points 10 is smaller than that of the intermittent adhesive application points 4, they can be more densely set on the elastic yarn 2 in the waist area 5, so that the waist area 5 forms a denser and more uniform continuous accordion-like pleats. This helps the elastic yarn 2 in the waist area 5 to not only play the role of a basic fastener, but also to fully reduce the pressure on the user's waist skin, reduce the degree of chafing, and make the user's waist feel more comfortable.

[0038] In summary, the explanation of the technical features and effects demonstrates that this utility model aims to reduce the amount of adhesive applied, improve production efficiency, and ensure the comfort and fit of the product through a new design.

[0039] By using a low-adhesion, intermittent distribution method, this invention divides the waistband into multiple independent elastic segments, with each segment connected stably and flexibly. This not only reduces the area of ​​continuous adhesive application and lowers production costs, but also significantly improves the breathability and wearing comfort of the waistband.

[0040] In addition, the segmented design allows the waistband to better adapt to changes in the wearer's body shape, maintaining a stable fit whether the stomach is empty or full, avoiding slippage or marks. This design is highly adaptable for one-size-fits-all products.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A low-adhesion segmented accordion waistband structure, comprising a waistband formed by an outer nonwoven fabric layer, several parallel elastic filaments, an inner nonwoven fabric layer, and several intermittent adhesive application points that sequentially bond the above three together, characterized in that, The waist circumference is divided along the width direction into a waist area that does not exceed 1 / 5 of its own width and the remaining part of the hip and abdomen area. The spacing of the elastic threads in the waist area is less than the spacing of the elastic threads in the hip and abdomen area. The waist circumference is divided into three adhesive zones along its length: left adhesive zone, middle adhesive zone, and right adhesive zone. Intermittent adhesive application positions are symmetrically set in the left and right adhesive zones. The length of each intermittent adhesive application position in the waist circumference is d1 ≤ the distance between adjacent intermittent adhesive application positions in the same direction, d2. Through the shrinkage of the elastic yarn, several pleats protruding towards the outer nonwoven fabric are formed between the intermittent adhesive application positions, where d1 = 6.33-11.4 mm and d2 = 6.33-15 mm.

2. The low-adhesion segmented accordion waist structure according to claim 1, characterized in that, Along the waist width direction, the intermittent glue application position is interrupted only at the position where the elastic thread is provided, or only at the position where the elastic thread is not provided, so that the total width of all intermittent glue application positions in the waist width direction Σwn=24-51mm, and the width of a single intermittent glue application position wn=1-11.9mm.

3. The low-adhesion segmented accordion waist structure according to claim 1, characterized in that, The density of the outer or inner nonwoven fabric is 9-24 g / m³.

4. The low-adhesion segmented accordion waist structure according to claim 1, characterized in that, The elastic filaments in the waist area have a thickness of 210-720 dtex, a quantity of 3-11, and a width of 10-25 mm. Alternatively, the elastic filaments in the buttock and abdominal region have a thickness of 420-900 dtex, a quantity of 10-30, and a width of no more than 50 mm.

5. The low-adhesion segmented accordion waist structure according to claim 2, characterized in that, The waist area is formed by intermittent bonding points through hot melt adhesive or ultrasonic bonding, which sequentially bond the outer non-woven fabric, elastic yarn and inner non-woven fabric together. The length of the intermittent bonding point in the waist length direction d3 is less than the length of the intermittent adhesive application point in the waist length direction d1, and the distance between adjacent intermittent bonding points in the same direction d4 is less than the distance between adjacent intermittent adhesive application points in the same direction d2.

Images