A disposable absorbent item

Abstract

A disposable absorbent garment has an elastic waistband on each of the two lateral sides of the lower back. The elastic waistband is fitted with a connecting device for connection to the front waist. When the elastic waistband is engaged with the front waist, it has an upper edge near the end of the absorbent garment and a lower edge near the hip area. The lower edge intersects with the outer contour of the absorbent garment. An imaginary line is drawn between the intersection points of the left and right waistbands and the outer contour of the absorbent garment, and this imaginary line has a first width x1. The hip area has a minimum lateral second width x2. The first width x1 is greater than the second width x2, and the first width x1 ≤ 1.34 x2. This design reduces wrinkles and ensures sufficient leak-proof performance, while maintaining a better fit during leg or body movement.

Description

Technical Field

[0001] This invention relates to a disposable absorbent article, and more particularly to a trouser-style absorbent article with an openable, waistband design. Background Technology

[0002] With the increasing popularity of pull-up diapers for both infants and adults, pull-up diapers have surpassed baby open-front diapers in market share and this trend is gradually increasing. This is mainly because pull-up diapers offer significantly better overall fit, leak-proof performance, and ease of dressing and undressing compared to open-front diapers. However, some issues exist. For example, pull-up diapers require removing all outer clothing before dressing, increasing the difficulty of wearing them. Additionally, pull-up diapers offer less breathability due to their tighter fit, which can lead to eczema in hot weather. This design aims to improve upon the shortcomings of open-front diapers compared to pull-up diapers, enhancing their overall fit, comfort, and leak-proof performance, while also maximizing material utilization during manufacturing. Summary of the Invention

[0003] This invention relates to a disposable absorbent article, and more particularly to a trouser-style absorbent article with an openable, waistband design.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a disposable absorbent article, the absorbent article comprising a front waist, a back waist, and a crotch located between the front waist and the back waist, the length direction of the absorbent article is defined as longitudinal, and the width direction as transverse, the absorbent article having an elastic waistband on each of the transverse sides of the back waist, the elastic waistband having a connecting device for connecting with the front waist, the elastic waistband of the present invention having an upper edge near the end of the absorbent article and a lower edge near the crotch, the lower edge having an intersection point with the outer contour of the absorbent article, an imaginary line 1 is drawn between the intersection points of the left and right waistbands and the outer contour of the absorbent article, the imaginary line 1 having a first width X1; the crotch having a minimum transverse second width X2; the first width X1 is greater than the second width X2, and the first width X1 ≤ 1.34X2.

[0005] When the absorbent item is worn, the waistband joins at the front waist, and the hip area passes through the crotch, with the hip portion sandwiched between the legs. This portion between the legs experiences a noticeable narrowing, approximately one-third of the original width. Therefore, this invention is designed so that the first width X1 is less than or equal to 1.34 times the second width X2. This ensures that the width of the absorbent item at the front waist provides sufficient absorbency and leak-proof performance. Furthermore, since this position is where the waistband joins the front waist, the size of the Velcro buckle is relatively small. This is because an excessively large Velcro buckle would have excessive rigidity, which would... Comfort is negatively affected, so part of the front waist is not fixed to the waistband. The narrowest area of ​​the crotch causes the hips to deform and narrow. The narrowed hips exert an inward pulling force on the front waist and the hip parts near the front waist. The greater the difference in span between the narrowing of the hips and the narrowing of the hips, the more obvious the pulling force is, and the more likely these parts are to wrinkle, affecting wearing comfort and appearance. The design of this invention makes the first width X1 less than or equal to 1.34 times the second width X2. This can reduce the formation of wrinkles and ensure sufficient leak prevention, and can maintain a better fit when the legs or body move.

[0006] Furthermore, the area of ​​minimum lateral width of the hip is located between the user's legs during use.

[0007] The minimum lateral width of the hip area is located between the legs during use to improve its fit.

[0008] Furthermore, the outer contour of the crotch of the absorbent item has a first point and a second point that overlap with the lower back, and the outer contour of the front waist has a third point and a fourth point that overlap with the crotch. The outer contour lines extending sequentially from the first point, the third point, the fourth point, and the second point are smooth curves.

[0009] By making its outer contour a smooth curve, the force in the crotch area can be applied more smoothly and evenly along the contour line, avoiding sudden changes in force that could cause wrinkles in the edge area and affect the aesthetics. In addition, the smooth design makes it fit the human body better.

[0010] Furthermore, the front waist section includes an upper waist section and a lower waist section, with the elastic waistband engaging in the lower waist section area.

[0011] The front waist is divided into upper and lower waist sections. The elastic waistband is attached to the lower waist area. The upper waist section, which is higher than the lower waist, can maintain a close fit to the body and improve the front waist's anti-leakage function. It can also be folded outward to cover the outside of the waistband joint area, covering the waistband opening and preventing the user from accidentally opening it.

[0012] Furthermore, the absorbent item includes an absorbent body, the upper waist portion has no absorbent body, and the lower waist portion partially overlaps with the absorbent body.

[0013] The absorbent body should only extend to the lower waist area to avoid excessive height and reduced front leakage prevention.

[0014] Furthermore, the maximum lateral width of the front waist is less than the minimum lateral width of the rear waist, with the ratio of the maximum lateral width of the front waist to the minimum lateral width of the rear waist being ≤0.57, and the ratio of the maximum lateral width of the front waist to the minimum lateral width of the rear waist being ≥0.5.

[0015] The maximum lateral width of the front waistband and the minimum lateral width of the back waistband designed in this invention are between 0.5 and 0.57. During its preparation, it can be made by offsetting adjacent cores in a direction perpendicular to the production line on a continuous composite body, and then forming single pieces with alternating different orientations through arc-shaped cutting lines, so as to achieve zero waste in the entire preparation process and improve the utilization rate of materials.

[0016] Furthermore, the area formed by the front waist and hip of the absorbent item has a horizontal center line and a vertical center line. The outer contour of the area formed by the front waist and hip is divided into an upper left outer contour, a lower left outer contour, an upper right outer contour, and a lower right outer contour by the horizontal center line and the outer contour of the area formed by the front waist and hip. The horizontal center line intersects the outer contour of the area formed by the front waist and hip at a left side point and a right side point. The upper left outer contour and the lower left outer contour are centrally symmetrical about the left side intersection point, and the upper right outer contour and the lower right outer contour are centrally symmetrical about the right side intersection point.

[0017] By further defining the outer contours of the front waist and hips to be centrally symmetrical about the intersection of the left and right sides, the alternating single pieces formed by the arc-shaped cutting lines during the manufacturing process have the same structural dimensions, which meets the production requirements. Attached Figure Description

[0018] Figure 1 This is a plan view of embodiment 1 of the present invention; Figure 2 This is a perspective view of the first usage method of embodiment 1 of the present invention; Figure 3 This is a usage state diagram under the first usage method of Embodiment 1 of the present invention; Figure 4 This is a perspective view of the second usage method in Embodiment 1 of the present invention; Figure 5 This is a diagram illustrating the preparation process of Embodiment 1 of the present invention; Figure 6 This is a plan view of embodiment 2 of the present invention. Detailed Implementation

[0019] The following will combine Figures 1 to 6 The specific implementation methods further illustrate the present invention.

[0020] Figures 1 to 5 The illustrations are related to Embodiment 1 of the present invention. Figure 6 The illustrations are related to Embodiment 2 of the present invention.

[0021] In this invention, the length direction of the disposable absorbent article 1 is defined as longitudinal (LD), and the width direction is defined as transverse (MD).

[0022] The disposable absorbent article 1 of the present invention can be divided into a front waist part A, a back waist part C and a crotch part B located between the front waist part and the back waist part. An elastic waistband 14 is attached to each of the two sides of the lateral MD of the back waist part C. A connecting device 141 is provided on the elastic waistband 14. The device can be a Velcro, a patch or any other commonly used material for connection. Figure 2 This diagram shows a three-dimensional view of the absorbent elastic waistband 14 of the present invention attached to the front waist A. The elastic waistband 14 intersects the outer contour of the hip area at point AB (this intersection point is not fixed, as there may be a vertical deviation when the user attaches the elastic waistband, and this intersection point includes the existence of this deviation). An imaginary line L1 is drawn at the intersection point AB on both sides laterally. When the absorbent item 1 is unfolded, the imaginary line L1 has a first width X1. The hip area C has a region with a minimum lateral width distributed along the longitudinal direction LD (in embodiment 1, the region with the minimum lateral width is exactly LB). Figure 1 In this context, only LB is used to represent the area (other cases may involve a larger area than LB). This minimum lateral width area is located in the crotch area of ​​the body during use (i.e., between the legs, adapting to this area to improve fit). This area has a second width x2. Figure 3 In use, the second width is narrowed to X2', and X2' in use is generally close to one-third of X2; the present invention is designed so that the first width X1 is greater than the second width X2, and the first width X1 ≤ 1.34X2. The first width X1 is less than or equal to 1.34 times the second width X2. This ensures that the width of the absorbent item in the front waist area is sufficient to achieve the desired absorbency and leak-proof effect. Since this area is where the belt joins the front waist, the size of the belt's Velcro buckle is relatively small. This is because an excessively large Velcro buckle would have too much rigidity, negatively impacting comfort. Therefore, part of the front waist is not fixed to the belt. The narrowest area of ​​the crotch causes the hips to deform and narrow. This narrowed hips exert an inward pulling force on the front waist and the hip area near the front waist. The greater the difference in span between the narrowed hips and the narrowed hips, the more pronounced the pulling force, and the more likely these areas are to wrinkle, affecting wearing comfort and appearance. This invention is designed so that the first width X1 is less than or equal to 1.34 times the second width X2. This reduces wrinkles, ensures sufficient leak-proof effect, and maintains a better fit during leg or body movement.

[0023] Figure 1As shown, the outer contour of the crotch area B of the absorbent item 1 has a first point a and a second point d that overlap with the lower back, and the outer contour of the front waist area A has a third point b and a fourth point c that overlap with the crotch area. In this embodiment, the third point b coincides with the intersection of the waist belt and the outer contour of the absorbent item; in reality, the two points may not coincide. The fourth point c is the same as the third point, and will not be repeated. The outer contour lines extending sequentially from the first point a, the third point b, the fourth point c, and the second point d are smooth curves. By making its outer contour a smooth curve, the force in the crotch area can be applied more smoothly and evenly along the contour line, avoiding sudden changes in force that could cause wrinkles in the edge area, affecting aesthetics. Furthermore, the smooth design results in a better fit to the human body.

[0024] The front waist section A can be divided into an upper waist section A1 and a lower waist section A2, with an elastic waistband 14 attached to the lower waist section A2. The upper waist section, which is higher than the lower waist section, can maintain a close fit to the body and improve the front waist's anti-leakage function. It can also be folded outward to cover the outside of the waistband joint, covering the waistband opening and preventing the user from accidentally opening it.

[0025] The absorbent article of the present invention also includes an absorbent body 13. Figure 1 As can be seen, the absorbent body 13 extends longitudinally only to the lower waist area A2 of the front waist A, and the upper waist A1 does not have the absorbent body 13, which makes the upper waist A1 less rigid and more flexible, making it easier to bend and cover the waist belt opening. Secondly, it can prevent the liquid inside the absorbent body from seeping into the upper waist area, causing discomfort such as dampness.

[0026] In the absorbent article 1 of the present invention, the maximum lateral width X3 of the front waist section A is less than the minimum lateral width X4 of the back waist section C. The ratio of the maximum lateral width X3 of the front waist section to the minimum lateral width X4 of the back waist section is ≤ 0.57, and the ratio of the maximum lateral width X3 of the front waist section to the minimum lateral width X4 of the back waist section is ≥ 0.5. The maximum lateral width of the front waist section A can be located at the imaginary front line L1, in which case X1 equals X3. Figure 5 This paper demonstrates a manufacturing process for this design, which can utilize existing pull-up trouser manufacturing processes. An outer cover layer and an inner cover layer are continuously conveyed. Waist and leg elastic elements are arranged at both ends of the conveying direction between the outer and inner cover layers to form a composite. Absorbent materials are then laminated onto the composite. These connected absorbent materials are offset in a direction perpendicular to the production line. Alternating single pieces with different orientations are formed by an arc-shaped cutting line L2, achieving a waste-free manufacturing process and improving material utilization.

[0027] Figure 6In Implementation Example 2 of the present invention, the area of ​​the front waist region A and the crotch region B of the absorbent article 1, that is, the area of ​​the front waist region A and the crotch region B is regarded as a whole, has a horizontal center line M. The horizontal center line intersects the absorbent article 1 at two points M1 (left intersection point) and M2 (right intersection point). The absorbent article 1 can be divided into left and right parts about the vertical center line N. The outer contour of the area of ​​the front waist region A and the crotch region B of the absorbent article 1 can be divided into left and right parts about the vertical center line N. The left and right outer contours can be further divided by the horizontal center line M into upper left outer contour NM1, lower left outer contour NM2, upper right outer contour NM3, and lower right outer contour NM4. The upper left outer contour NM1 and the lower left outer contour NM2 are centrally symmetrical about M1, and the upper right outer contour NM3 and the lower right outer contour NM4 are centrally symmetrical about M2.

[0028] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A disposable absorbent article, comprising a front waist section, a back waist section, and a crotch section located between the front waist section and the back waist section, wherein the length direction of the absorbent article is defined as longitudinal, and the width direction as transverse, wherein each side of the back waist section is provided with an elastic waistband, and the elastic waistband is provided with a connecting device for connecting to the front waist section, characterized in that, When the elastic waistband is engaged with the front waist, the elastic waistband has an upper edge near the end of the absorbent item and a lower edge near the hip. The lower edge intersects with the outer contour of the absorbent item. An imaginary line is drawn between the intersections of the left and right waistbands and the outer contour of the absorbent item. This imaginary line has a first width X1. The hip has a minimum lateral second width X2. The first width X1 is greater than the second width X2, and the first width X1 ≤ 1.34X2.

2. A disposable absorbent article according to claim 1, characterized in that The area with the minimum lateral width of the hip is located between the user's legs during use.

3. A disposable absorbent article according to claim 2, characterized in that The outer contour of the crotch of the absorbent item has a first point and a second point that overlap with the lower back, and the outer contour of the front waist has a third point and a fourth point that overlap with the crotch. The outer contour lines extending sequentially from the first point, the third point, the fourth point, and the second point are smooth curves.

4. A disposable absorbent article according to claim 1, characterized in that, The front waist section includes an upper waist section and a lower waist section, with the elastic waistband engaging in the lower waist section area.

5. A disposable absorbent article according to claim 4, characterized in that The absorbent material includes an absorbent body, the upper waist section has no absorbent body, and the lower waist section partially overlaps with the absorbent body.

6. A disposable absorbent article according to any of claims 1-5, characterized in that, The maximum lateral width of the front waist is less than the minimum lateral width of the rear waist. The ratio of the maximum lateral width of the front waist to the minimum lateral width of the rear waist is ≤0.57, and the ratio of the maximum lateral width of the front waist to the minimum lateral width of the rear waist is ≥0.

5.

7. A disposable absorbent article according to claim 6, characterized in that The area formed by the front waist and hips of the absorbent material has a horizontal center line and a vertical center line. The outer contour of the area formed by the front waist and hips is divided into an upper left outer contour, a lower left outer contour, an upper right outer contour, and a lower right outer contour by the horizontal center line and the outer contour of the area formed by the front waist and hips. The upper left outer contour and the lower left outer contour are centrally symmetrical about the left intersection point, and the upper right outer contour and the lower right outer contour are centrally symmetrical about the right intersection point.

Images