Ergonomic composite elastic waistline pull-ups and preparation method thereof

Abstract

The invention relates to the field of hygienic products, provides composite elastic waistline pull-ups conforming to ergonomics and a preparation method of the composite elastic waistline pull-ups, and solves the problems that the arrangement mode of elastic pieces of existing pull-ups is single, precise elastic support is difficult to provide according to the requirements of different parts of the waist of a human body, and the leakage-proof performance is poor. Comprising a liquid-permeable surface layer, an absorption core body and a liquid-tight bottom layer which are arranged in a stacked mode. The width direction of the unfolded pull-ups is defined as the X direction, and the length direction of the unfolded pull-ups is defined as the Y direction; an elastic waistline is arranged between the liquid-permeable surface layer and the liquid-tight bottom layer, and the elastic waistline is divided into four functional areas in the Y direction, namely an anti-tightening area, a fitting area, a slimming area and an anti-falling area in sequence from the outer side to the inner side; the elastic waistline comprises two layers of wrapping layers arranged in a laminated mode and a plurality of elastic pieces fixedly bonded in the two layers of wrapping layers.

Description

Technical Field

[0001] The present invention relates to the field of sanitary products, and in particular to a pair of ergonomic composite elastic waist pull-up pants and a preparation method thereof. Background Art

[0002] In the fields of infant care and adult incontinence care, pull-up pants are widely used as a convenient absorbent sanitary product due to their easy donning and undressing, body-fitting features, etc. However, existing pull-up pants still have many shortcomings in design and performance.

[0003] From the perspective of elastic waist design, most of the elastic waists for pull-up pants currently on the market use a single arrangement of elastic parts, without functional zoning based on the characteristics and needs of different parts of the human waist. Different areas of the human waist have different requirements for elastic support. For example, the outside of the waist needs to reduce pressure to avoid marks, the middle of the waist needs to fit tightly to prevent side leakage, the sides of the waist may need additional contraction force to achieve a slimming and shaping effect, and the area near the crotch requires sufficient support to prevent the pull-up pants from falling. The existing single arrangement of elastic parts cannot meet these diverse needs, resulting in marks, side leakage, and falling during activities, which seriously affects the comfort and leak-proof performance of wearing.

[0004] The specific arrangement of elastics in existing pull-up pants lacks scientific and targeted design. For example, some pull-up pants have elastics arranged too densely, which can cause concentrated pressure on the waist and cause discomfort. Other pull-up pants have elastics arranged too sparsely, which can fail to provide sufficient support and cause the pants to shift and fall easily. Furthermore, in areas where excess fat is likely to form on the sides of the waist, the elastics in existing pull-up pants fail to provide effective contraction, making it difficult to achieve a slimming and shaping effect.

[0005] In terms of the side seal design, most existing pull-up pants have straight or simple curved side seals. The waist and leg widths are either the same or have little difference. The front and back seals are also not properly extended. This design doesn't conform well to the curves of the waist and legs, resulting in large gaps when worn. This makes it easy for urine and feces to leak out of the sides and back, reducing the pull-up pants' leak-proof performance.

[0006] Chinese patent application number CN202111197484.X discloses an anti-strangulation breathable waist elastic material and its preparation method, and comfortable sanitary products. The anti-strangulation breathable waist elastic material includes a first elastic non-woven fabric and a second elastic non-woven fabric composited up and down, the first elastic non-woven fabric includes a cross-laid bicomponent curly fiber, the bicomponent curly fiber includes a first fiber and a second fiber arranged in parallel, the first fiber and the second fiber are bonded in parallel to form a curly fiber; the second elastic non-woven fabric includes at least one fiber layer, and the fiber layer is formed by disorderly superposition of elastic fiber yarns. The elastic material provided by this invention can be used to prepare the elastic waist of sanitary products, such as the elastic waist of pull-up pants, which can well solve the problem of the waist and legs being strangled or the pants falling off due to inappropriate tightness during use of pull-up pants, and can also solve the problem of poor air permeability and poor comfort. However, the waist elastic material usually adopts a single elastic part arrangement when applied, and does not perform functional zoning according to the characteristics and needs of different parts of the human waist.

[0007] Chinese patent application number CN201811628682.5 discloses an elastic waistband with multiple elastic groups, as well as equipment and methods for manufacturing the same. The invention comprises a wrapping layer and spandex yarns disposed within the wrapping layer. The wrapping layer comprises first, second, and third sections, and the spandex yarns comprise first, second, and third spandex yarns. The multiple spandex yarns are transported by multiple servo motors in a multi-filament unwinding device, and conveyed and glued via speed sensors and guide rollers. The conveying device transports and glues the wrapping layer, while the folding plate folds the wrapping layer and wraps the spandex yarns. A pressing roller group presses the wrapping layer together. The evenly distributed elastic spandex yarns in each section create a smooth surface for the elastic waistband, enhancing user comfort. During the production process, intermittent glue spraying is performed to reduce glue spraying volume. The multi-filament unwinding device employs multiple servo motors to independently convey the multiple spandex yarns, preventing interference. However, the elastic members in this invention are distributed relatively densely, which may cause concentrated pressure on the waist of the human body and cause discomfort when wearing. Summary of the Invention

[0008] Therefore, in response to the above problems, the present invention provides an ergonomic composite elastic waist pull-up pants and a preparation method thereof, which solves the problems that the elastic parts of existing pull-up pants are arranged in a single manner, it is difficult to provide precise elastic support for different parts of the human waist, and the leakage-proof performance is poor.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] A pair of ergonomic pull-up pants with composite elastic waist, comprising a stacked liquid-permeable surface layer, an absorbent core and a liquid-impermeable bottom layer; the width direction of the pull-up pants when unfolded is defined as the X direction, and the length direction is defined as the Y direction; an elastic waist is provided between the liquid-permeable surface layer and the liquid-impermeable bottom layer, and the elastic waist is divided into four functional areas along the Y direction, which are, from the outside to the inside, an anti-strangulation area, a fitting area, a slimming area and an anti-falling area; the elastic waist comprises two stacked wrapping layers and a number of elastic members bonded and fixed to the two wrapping layers, including a first elastic member in the anti-strangulation area The elastic waist comprises a front waist and a back waist, the front waist and the back waist are fixedly connected, and the sides are combined to form a side sealing area; the side sealing area has a waist end which is located at the waist position when the pull-up pants are worn and a leg end which is located at the crotch position, and the side sealing area is composed of a front sealing area and a back sealing area, which are in the shape of an arc line segment as a whole, so that the width of the waist end is different from the width of the leg end, the front sealing area gradually extends inward from the waist end, and the back sealing area gradually extends inward from the leg end.

[0011] Furthermore, the first elastic members are arranged in parallel along the X direction with a spacing of 3-8 mm.

[0012] Furthermore, the second elastic members are arranged in parallel along the X direction with a spacing of 1-3 mm.

[0013] Furthermore, the third elastic members are configured as a cross-net structure, and adjacent third elastic members are connected to each other at intersections.

[0014] Furthermore, the fourth elastic members are arranged in groups along the Y direction, each group contains 2-4 fourth elastic members, and the fourth elastic members in the group are arranged in parallel; near the side seal area of ​​the pull-up pants, the fourth elastic members form an angle of 10°-30° with the side seal area.

[0015] Furthermore, the height of the anti-strangulation area along the Y direction is a, the height of the fitting area along the Y direction is b, the height of the slimming area along the Y direction is c, and the height of the anti-falling area along the Y direction is d; b≥c, b>a, c>d.

[0016] A method for preparing ergonomic composite elastic waist pull-up pants comprises the following steps:

[0017] S1, providing a liquid permeable surface layer, an absorbent core and a liquid impermeable bottom layer;

[0018] S2, unwinding and conveying the wrapping layer, applying glue, laying the first elastic member, the second elastic member, the third elastic member, and the fourth elastic member on the wrapping layer, then covering with another wrapping layer, and pressing to form an elastic waist;

[0019] S3, arranging the elastic waistband prepared in step S2 between the liquid-permeable surface layer and the liquid-impermeable bottom layer, and laminating the liquid-permeable surface layer with the elastic waistband, the absorbent core, and the liquid-impermeable bottom layer;

[0020] S4, folding the composite pull-up pants to connect the front waistline and the back waistline, and composite the side edges to form side sealing areas;

[0021] S5. Sealing the side sealing areas to form a front sealing area and a rear sealing area;

[0022] S6. Cut, arrange and package the sealed pull-up pants to obtain finished products.

[0023] By adopting the above technical solution, the beneficial effects of the present invention are:

[0024] 1. The elastic waistline is divided into four functional zones along the length of the pull-up pants: an anti-squeeze zone, a fitted zone, a slimming zone, and a drop-proof zone. This ergonomic design provides precise elastic support tailored to the needs of different areas of the waist. The anti-squeeze zone reduces pressure on the waist, the fitted zone better conforms to the waist curve, the slimming zone helps shape the waistline, and the drop-proof zone prevents the pants from sagging, significantly enhancing the comfort and functionality of the pull-up pants.

[0025] 2. The front and back waistbands are fixedly connected, and the sides are combined to form side seals. The side seals are generally curved segments, making the waist and leg widths different. The front seal extends gradually inward from the waist, while the back seal extends gradually inward from the leg. This design better fits the curves of the waist and legs, reduces gaps when worn, effectively prevents urine and feces from leaking from the side and back, and improves the leak-proof performance of pull-up pants.

[0026] 3. The height of the fitting area along the length direction is set as: b≥c and b>a, that is, the fitting area occupies a relatively large height in the elastic waist, which can fit the human waist curve more fully, ensure that the pull-up pants fit closely to the waist, effectively prevent side leakage, and improve the leakage prevention performance; the height relationship between the slimming area and the anti-falling area is set as: c>d, that is, the height of the slimming area is greater than the anti-falling area. In this way, while ensuring the slimming and shaping effect, the supporting force of the anti-falling area can be reasonably distributed, so that the pull-up pants can not only play a slimming role, but also prevent falling. The overall structure is more reasonable and the wearing effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of pull-up pants according to an embodiment of the present invention;

[0028] Figure 2 Schematic diagram of a pull-up pants according to an embodiment of the present invention;

[0029] Figure 3 Schematic diagram of the structure of the elastic waist in an embodiment of the present invention;

[0030] Figure 4 This is a front view of pull-up pants according to an embodiment of the present invention;

[0031] Figure 5 Schematic diagram of the angle between the fourth elastic member and the side sealing area in an embodiment of the present invention;

[0032] Explanation of the numbers in the figure: 1-liquid-permeable surface layer, 2-absorbent core, 3-liquid-impermeable bottom layer, 4-elastic waist, anti-strangulation area 41, 42-fitting area, 43-slimming area, 44-anti-falling area, 45-wrapping layer, 46-elastic member, 401-first elastic member, 402-second elastic member, 403-third elastic member, 404-fourth elastic member, 411-front waist, 412 back waist, 5-side sealing area, α-angle between the fourth elastic member and the side sealing area. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are:

[0034] refer to Figures 1 to 5 , a pair of ergonomic pull-up pants with composite elastic waist, comprising a stacked liquid-permeable surface layer 1, an absorbent core 2 and a liquid-impermeable bottom layer 3; the width direction of the pull-up pants when unfolded is defined as the X direction, and the length direction is defined as the Y direction; an elastic waist 4 is provided between the liquid-permeable surface layer and the liquid-impermeable bottom layer, and the elastic waist 4 is divided into four functional areas along the Y direction, namely, an anti-strangulation area 41, a fitting area 42, a slimming area 43, and an anti-falling area 44 from the outside to the inside; the elastic waist 4 comprises two stacked wrapping layers 45 and a plurality of elastic members 46 bonded and fixed to the two wrapping layers, including a first elastic member 40 in the anti-strangulation area 41 1. A second elastic member 402 in the fitting area, a third elastic member 403 in the slimming area, and a fourth elastic member 404 in the anti-falling area; the elastic waist 4 includes a front waist 411 and a back waist 412, the front waist 411 and the back waist 412 are fixedly connected, and the side edges are combined to form a side sealing area 5; the side sealing area 5 has a waist end located at the waist position when the pull-up pants are worn and a leg end located at the crotch position, the side sealing area is composed of a front sealing area and a back sealing area, and the whole is in the shape of an arc line segment, so that the width of the waist end is different from the width of the leg end, the front sealing area gradually extends inward from the waist end, and the back sealing area gradually extends inward from the leg end.

[0035] Among them, the first elastic members 401 are arranged in parallel along the X direction with a spacing of 6 mm; the second elastic members 402 are arranged in parallel along the X direction with a spacing of 3 mm; the third elastic members 403 are arranged in a cross-net structure, and adjacent third elastic members 403 are connected to each other at the intersection; the fourth elastic members 404 are arranged in groups along the Y direction, each group contains 4 fourth elastic members 404, and the fourth elastic members 404 in the group are arranged in parallel; near the side seal area of ​​the pull-up pants, the angle α between the fourth elastic member 404 and the side seal area is 10°.

[0036] The height of the anti-strangulation area along the Y direction is a, the height of the fitting area along the Y direction is b, the height of the slimming area along the Y direction is c, and the height of the anti-falling area along the Y direction is d; b=c, b>a, c>d.

[0037] The method for preparing the ergonomic composite elastic waist pull-up pants described above comprises the following steps:

[0038] S1, providing a liquid permeable surface layer, an absorbent core and a liquid impermeable bottom layer;

[0039] S2, unwinding and conveying the wrapping layer, applying glue, laying the first elastic member, the second elastic member, the third elastic member, and the fourth elastic member on the wrapping layer, then covering with another wrapping layer, and pressing to form an elastic waist;

[0040] S3, arranging the elastic waistband prepared in step S2 between the liquid-permeable surface layer and the liquid-impermeable bottom layer, and laminating the liquid-permeable surface layer with the elastic waistband, the absorbent core, and the liquid-impermeable bottom layer;

[0041] S4, folding the composite pull-up pants to connect the front waistline and the back waistline, and composite the side edges to form side sealing areas;

[0042] S5. Sealing the side sealing areas to form a front sealing area and a rear sealing area;

[0043] S6. Cut, arrange and package the sealed pull-up pants to obtain finished products.

[0044] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the present invention.

Claims

1. A pair of ergonomic composite elastic waist pull-up pants, characterized by: The invention comprises a liquid-permeable surface layer, an absorbent core and a liquid-impermeable bottom layer arranged in a stacked manner; the width direction of the pull-up pants when unfolded is defined as the X direction, and the length direction is defined as the Y direction; an elastic waist is arranged between the liquid-permeable surface layer and the liquid-impermeable bottom layer, and the elastic waist is divided into four functional areas along the Y direction, which are an anti-strangulation area, a fitting area, a slimming area and an anti-falling area from the outside to the inside; the elastic waist comprises two stacked wrapping layers and a number of elastic parts bonded and fixed to the two wrapping layers, including a first elastic part in the anti-strangulation area, a second elastic part in the fitting area, and a second elastic part in the anti-strangulation area. The elastic waist comprises a front waistline and a back waistline, the front waistline and the back waistline are fixedly connected, and the side edges are compounded to form a side sealing area; the side sealing area has a waist end which is located at the waist position when the pull-up pants are worn and a leg end which is located at the crotch position, and the side sealing area is composed of a front sealing area and a back sealing area, which are in the shape of an arc line segment as a whole, so that the width of the waist end is different from the width of the leg end, the front sealing area gradually extends inward from the waist end, and the back sealing area gradually extends inward from the leg end.

2. The ergonomic composite elastic waist pull-up pants according to claim 1, characterized in that: The first elastic members are arranged in parallel along the X direction with a spacing of 3-8 mm.

3. The ergonomic composite elastic waist pull-up pants according to claim 1, characterized in that: The second elastic members are arranged in parallel along the X direction with a spacing of 1-3 mm.

4. The ergonomic composite elastic waist pull-up pants according to claim 1, characterized in that: The third elastic members are configured as a cross-net structure, and adjacent third elastic members are connected to each other at intersections.

5. The ergonomic composite elastic waist pull-up pants according to claim 1, characterized in that: The fourth elastic members are arranged in groups along the Y direction, each group contains 2-4 fourth elastic members, and the fourth elastic members in the group are arranged in parallel; near the side seal area of ​​the pull-up pants, the fourth elastic members form an angle of 10°-30° with the side seal area.

6. The ergonomic composite elastic waist pull-up pants according to claim 1, characterized in that: The height of the anti-strangulation area along the Y direction is a, the height of the fitting area along the Y direction is b, the height of the slimming area along the Y direction is c, and the height of the anti-falling area along the Y direction is d; wherein b≥c, b>a, c>d.

7. A method for preparing ergonomic composite elastic waist pull-up pants, characterized in that: The following steps are involved: S1, providing a liquid permeable surface layer, an absorbent core and a liquid impermeable bottom layer; S2, unwinding and conveying the wrapping layer, applying glue, laying the first elastic member, the second elastic member, the third elastic member, and the fourth elastic member on the wrapping layer, then covering with another wrapping layer, and pressing to form an elastic waist; S3, arranging the elastic waistband prepared in step S2 between the liquid-permeable surface layer and the liquid-impermeable bottom layer, and laminating the liquid-permeable surface layer with the elastic waistband, the absorbent core, and the liquid-impermeable bottom layer; S4, folding the composite pull-up pants to connect the front waistline and the back waistline, and composite the side edges to form side sealing areas; S5. Sealing the side sealing areas to form a front sealing area and a rear sealing area; S6. Cut, arrange and package the sealed pull-up pants to obtain finished products.

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