CN111700735A - an absorbent article - Google Patents

Abstract

The invention discloses an absorbent article, which comprises a surface layer, an absorbent body, a guard and a back layer. The surface layer, the absorber and the guard are arranged one above the other, wherein the surface layer is in direct contact with the skin. The cover wraps around the absorbent body from the side near the wearer's skin and forms an opening on the side remote from the wearer's skin, and the region of the cover near the opening is attached to the securing end or backsheet of the armour. The absorbent article has a high water absorption speed and a large amount of liquid absorption.

Description

an absorbent article

technical field

The present invention relates to the field of daily necessities, in particular to an absorbent article, which is used as diapers for infants or adults.

Background technique

Figure 1 shows an expanded view of an absorbent article such as a pant-type diaper. When A1 and A2 in FIG. 1 are butted together, and A3 and A4 are butted together, a shorts-type absorbent article having a three-dimensional structure is obtained. FIG. 2 shows a schematic transverse cross-sectional view of the diaper taken along the A-A direction of FIG. 1 . In order to distinguish the relationship between the layers of the absorbent article, the glue between the layers in Figure 2 is hidden, and the spacing between the layers is shown adaptively exaggerated.

As shown in Figures 1 and 2, an absorbent product such as a diaper is provided with a water-permeable surface layer 1, an absorber 2, and a water-repellent back layer 3 in sequence. The water-permeable surface layer 1 is in contact with the user's skin and directly absorbs foreign matter such as urine. After passing through the water-permeable surface layer 1 , the foreign matter enters the absorber 2 , flows from top to bottom in the absorber 2 , and remains in the absorber 2 .

In the existing absorbent products, the materials of each layer are adhered and fixed to each other by means of hot melting or gluing to form. The adhesive between the absorber 1 and the water-permeable surface layer 2 does not have good water permeability, which will slow down the rate of foreign matter entering the absorber. At the same time, the absorber 2 is only in contact with the water-permeable surface layer 1 on the surface close to the user's skin, and the contact area between the two is limited, which also affects the rate at which the absorber 2 absorbs foreign matter. Therefore, the existing absorbent articles cannot guarantee fast absorption of foreign matter, so that the user's skin cannot quickly enter a dry state.

The absorbent articles shown in Figures 1 and 2 also suffer from insufficient absorption capacity. Specifically, the absorber 2 is made of a material with strong water absorption and water retention capabilities, and the liquid flowing into a certain area in the absorber 2 is not easy to continue to flow in the absorber 2 . Since the part at each edge position of the absorbent body 2 is not easy to directly contact and absorb liquid, the function of absorbing liquid of the absorbent body 2 in this part cannot be clearly manifested.

Referring further to FIG. 2 , in the existing absorbent product, the top portion 4A of the skirts 4 on both lateral sides of the absorbent product at the top position is folded toward the longitudinal center of the absorbent product. During donning, the top portion 4A of the leak guard 4 will come into direct contact with the wearer's legs. As the absorbent article continues to be raised up to the waist, the user's leg circumference increases and exerts more and more pressure on the top portion 4A, which is continuously pulled towards the center position AA of the diaper by friction. Due to the pressing effect of the surface layer 1 and the back layer 3, the elastic body of the top part 4A of the protective enclosure cannot stand upright freely and exert its elastic locking effect, which will cause the leak-proof enclosure to lose its "leak-proof" effect. .

Therefore, the performance of existing absorbent articles such as diapers needs to be further improved.

SUMMARY OF THE INVENTION

One of the objectives of the present invention is to provide an absorbent article, which can at least solve the technical problem of how to quickly absorb foreign matter such as urine.

The present invention is solved by an absorbent article of the following form. The absorbent article includes a topsheet, a backsheet, an absorbent body, and a wrap. Therein, the facing is in direct contact with the wearer's skin and is configured to allow liquid to pass therethrough. The back layer is disposed opposite to the surface layer and is located on the side away from the wearer's skin, wherein the back layer is made of a breathable and water-impermeable material. The absorbent body is disposed between the topsheet and the backsheet for absorbing and locking the liquid. The enclosure includes a fixed end fixed between the topsheet and the backsheet and a free end opposite the fixed end, the enclosure for preventing leakage of the liquid from the lateral sides of the absorbent article .

wherein the topsheet wraps around the absorbent body from a side close to the wearer's skin and forms an opening on a side away from the wearer's skin, and an area of the topsheet adjacent to the opening is attached to the protector on the fixed end of the perimeter or on the back layer.

Since the topsheet is joined to the absorbent body in the form of a "wrap around the absorbent body", even if a small amount of glue is used between the two, the absorbent body can be held firmly inside the absorbent article, which makes the absorbent body in the direction of the absorbent body. One side surface of the wearer's skin has a larger contact area with the topsheet.

In addition to this, the cover is only partially attached to the leak guard or backsheet on the side facing away from the wearer. Since at least a partial area of the topsheet on this side is not bonded to the backsheet or the leak-proof enclosure, liquids such as urine can be smoothly conducted from the topsheet to the surface of the absorbent body on the side facing away from the wearer's skin. The liquid can be absorbed on the corresponding side surface of the absorbent body during the flow process, that is, the liquid is absorbed in the process of flowing through the side surface of the absorbent body close to the wearer's skin, the side surface away from the wearer's skin, and the lateral side surface. Body absorption, therefore, liquid can be drawn into the absorbent body at a faster rate, and the wearer can enter a dry state more quickly. Moreover, this type of absorbent article is more beneficial to guide the liquid evenly to each edge position of the absorbent body, thereby increasing the absorbent capacity of the absorbent body.

According to a preferred embodiment of the invention, the region where the facing layer and the jacket or back layer are attached to each other extends from the edge side towards the opening. For this area that is hardened by setting the adhesive or hardened by heat sealing, after setting the area for attaching the facing layer as above, the liquid is more likely to be directed to the extreme end of the facing layer, and the absorbent body faces away from the wearer A larger area of one side surface of the user's skin can be in direct contact with the topsheet and absorb fluid directly.

According to a preferred embodiment of the present invention, the fixed end of the enclosure is inserted between the top layer and the back layer, and along the transverse direction of the absorbent article, the fixed end is connected to the top layer the corresponding ends are flush.

In this case, the facing is attached to the leak guard in the area facing away from the wearer's skin. Compared with the solution in which the topsheet is directly attached to the water-repellent backsheet, in this solution, the absorbent articles on the left and right sides of the opening have uniform thickness. Since both the left and right sides of the opening are areas for direct fit with the wearer, the uniform thickness arrangement can avoid giving the wearer an uneven wearing feeling.

According to a preferred embodiment of the present invention, the longitudinal center plane of the opening substantially coincides with the longitudinal center plane of the absorbent article.

In the transverse direction, the extension distance L ₁ of the area between the facing layer and the jacket or back layer attached to each other is: 5%*L≦L ₁ ≦20%*L, where L is the The extension distance of the absorber in the lateral direction. On the basis of ensuring that the layers are firmly joined to each other, the extension distance L ₁ can ensure the maximum extension distance of the top layer on the side of the absorbent body facing away from the wearer's skin.

According to a preferred embodiment of the present invention, the skirt extends from the fixed end around the lateral sides of the cover to the top side of the cover close to the wearer's skin, and the free end extends on the top surface, Therein, the free end is configured as an open bend with an opening towards the lateral side of the absorbent article. The bend includes a first portion extending inwardly of the top surface and a second portion extending in an opposite direction from an end of the first portion. The second part is provided with at least one elastic body extending in the longitudinal direction at a position facing the edge of the absorbent article.

When the wearer wears the absorbent article, the inner side of the free end (bending portion) is pressed first, and the second part of the free end is thereby naturally raised in a direction perpendicular to the absorbent body. The enclosure now more easily achieves a leak-proof effect, whereby the absorbent article can achieve another object of the present invention.

According to a preferred embodiment of the present invention, along the lateral direction, the extension distance D of the bent portion on the top surface is 20 mm≤D≤30 mm. The second portion of the bending zone can form a leak-proof zone of suitable height in a direction perpendicular to the absorbent body. The leak-proof area will not cause the liquid to be directly sprayed to the leak-proof perimeter and overflow due to the high length; at the same time, it will not reduce the absorption rate of the absorbent body by covering more surface layers on the side close to the wearer's skin due to the long extension length. .

According to a preferred embodiment of the present invention, the surface layer contains a pH adjuster, and the pH adjuster is selected from 0.05-1wt% tea polyphenols, 0.05-0.1wt% capryloylhydroxamic acid or both. mixture. More preferably, the concentration of the pH adjusting agent is 0.05wt% capryloylhydroxamic acid, or a mixture of 0.3wt% tea polyphenols and 0.05wt% capryloylhydroxamic acid.

Wherein, the dosage of the pH adjusting agent is preferably 7g/m ² -10g/m ² . The pH value of the pH adjusting agent is 4.5-5.5.

According to the surface layer of this form, it can effectively inhibit the activity of urease and control the increase of pH value, thereby ensuring that the surface layer does not cause irritation to the wearer's skin to the greatest extent even when urine is left.

According to a preferred embodiment of the present invention, the absorbent article includes an elastic waist for elastically attaching the absorbent article to a user, the elastic waist including a front waist area corresponding to the user's abdomen and a back waistline area corresponding to the waist of the user, and the stretch ratio of the front waistline area is lower than that of the back waistline area.

According to the existing absorbent articles, the elastic waist of some products is constituted by a single elastic body. The elastic waist of some products is combined with the waist circumference of the human body in different positions in the height direction and has the characteristics of different girth lengths, and elastic bodies with different lengths or elasticity are arranged at the positions corresponding to different waist heights. However, the above design only takes into account the characteristics of human body structure. In the above-mentioned preferred embodiments, the inventors found that when a wearer, such as an infant, breathes, the absorbent article generates less pressure in the region corresponding to the abdomen due to the wearer's breathing. In the case where the front waist area is set to have a smaller stretching ratio, the absorbent article worn on the user can produce a relatively uniform pressure on the abdomen and back waist of the user, so that the user can wear the absorbent article during use. for a more comfortable user experience.

According to a preferred embodiment of the present invention, the surface layer is spaced apart from each other between the partial area of the side facing away from the wearer's skin and the back layer or jacket to form a free area, and the free area is along the The extension distance D1 in the lateral direction is: 5mm≤D1≤15mm.

According to a preferred embodiment of the present invention, the main body includes an absorber cover sheet located between the surface layer and the absorber, and the absorber cover sheet is a hydrophilic SMS non-woven fabric or absorbent paper.

According to a preferred embodiment of the present invention, the width D2 of the opening is: 15mm≤D2≤25mm.

According to a preferred embodiment of the present invention, the grammage FAW of the hydrophilic SMS non-woven fabric is: 12gsm≤FAW≤18gsm.

According to a preferred embodiment of the present invention, the absorber comprises fluff pulp, polymer water-absorbent resin particles or ES fibers.

According to a preferred embodiment of the present invention, the surface layer adopts low-water-retention fibers with a water-retention capacity of 20-50mg/15ml.

According to a preferred embodiment of the present invention, the absorbent article is a pant-type diaper that can be directly worn.

On the basis of common knowledge in the field, the above preferred embodiments can be arbitrarily combined to obtain preferred examples of the present invention.

Other systems, features and advantages of the present invention will be appreciated by those skilled in the art upon reading the following figures and detailed description. It is intended that all such additional systems, features and advantages be included within this description and this Summary, be within the scope of the invention, and be protected by the accompanying claims.

Description of drawings

FIG. 1 is a schematic perspective view of a conventional pant-type diaper after being unfolded.

FIG. 2 is a schematic cross-sectional view along the transverse centerline A-A of FIG. 1 .

3 is a schematic perspective view of a pant-type diaper according to the present invention after unfolding.

FIG. 4 is a schematic cross-sectional view along the longitudinal centerline B-B of FIG. 3 .

FIG. 5 is a schematic cross-sectional view according to the line C-C along the transverse centerline of FIG. 3 .

FIG. 6 is a schematic cross-sectional view of the diaper of the alternative embodiment of FIG. 5 .

Fig. 7(a) is a schematic diagram of a bent portion of the diaper of Figs. 5 and 6 in an unused state.

Fig. 7(b) is a schematic view when the bent portion of the diaper just contacts the leg of the wearer.

7(c)-7(e) are schematic diagrams of the bending portion in different states after the diaper is worn.

FIG. 8 is a data comparison diagram of the rewet amount of diapers of different embodiments.

FIG. 9 is a data comparison diagram of the utilization rate of the absorber of the diapers of different embodiments.

Fig. 10 is a graph showing the state change of pH value of diapers in different embodiments.

Figure 11 is a schematic view of a diaper with dimensions marked.

Detailed ways

The preferred embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. The following descriptions are exemplary and not limiting of the present invention, and any other similar situations also fall within the protection scope of the present invention.

In the present invention, the term "proximal" refers to the side close to the wearer's skin, and "distal" refers to the side away from the wearer's skin; the top side of the diaper in Figures 4-7 corresponds to the wearer's Skin, the bottom side corresponds to the exposed side of the diaper. In the following description, directional terms such as "up", "down", "left" and "right" are only used for description in conjunction with the accompanying drawings, and the components of the present invention can be placed in various directions. The terminology is for the purpose of example and not limitation. "Longitudinal" means the longitudinal direction of the diaper, and "horizontal" means the widthwise direction of the diaper, and the "longitudinal" is in a vertical relationship.

For the convenience of description, the structure and material of a pant-type diaper, which is an absorbent article, will be described below in the form of diagrams. Apart from differences, other types of absorbent articles such as diapers, incontinence protectors, sanitary napkins, and diapers can also be made of the same material and structure as pants-type diapers.

As shown in Figures 3-6, wherein, Figure 3 is a schematic diagram of an unfolded pant-type diaper according to a preferred embodiment of the present invention; Figure 4 is a longitudinal cross-sectional view along the longitudinal centerline B-B of Figure 3; Figure 5, 6 is a transverse cross-sectional view along the transverse centerline C-C of FIG. 1 , wherein FIGS. 5 and 6 show transverse cross-sectional views of different embodiments.

As shown in FIGS. 3-6 , the diaper 100 includes a surface layer 110 , a back layer 130 , an absorbent body 120 and a skirt 140 . The surface layer 110 , the absorber 120 and the back layer 130 are sequentially arranged from the proximal side to the distal side of the diaper 100 . The cover 110 is intended to be in direct contact with the wearer's skin, and may be made of a material such as an air-through nonwoven fabric that is easily permeable to liquids such as urine. The fibers in the air-through nonwoven are preferably arranged to extend in the longitudinal direction BB.

The absorbent body 120 includes materials such as fluff pulp, high molecular water absorbent resin particles, or ES fibers, etc., for absorbing and locking liquids. Usually, fluff pulp, polymer water-absorbent resin particles or ES fibers are used in granular form such as granules or powder.

The back layer 130 on the far side of the diaper 100 is opposite to the surface layer 110 , and is made of a breathable and water-impermeable material. The back layer 130 is made of, for example, PE film and ordinary water-repellent non-woven fabric, or is made of medical waterproof non-woven fabric and ordinary water-repellent non-woven fabric.

5, 6, the skirt 140 is used to prevent liquid leakage from the lateral sides of the absorbent article, it is located on the lateral sides of the diaper 100, and has a fixed end 142 inserted and fixed between the topsheet 110 and the backsheet 130 , a free end 144 opposite to the fixed end 142 , and a connecting portion 143 between the fixed end 142 and the free end 144 . The fixed end 142 and the free end 144 are respectively bent toward the longitudinal center of the diaper 100 by the connecting portion 143 located on the lateral side of the diaper 100 .

In the diaper 100 shown in FIG. 5, the cover 110 wraps around the absorbent body 120 from the proximal side (side closer to the wearer's skin) and forms openings 112 distally (side away from the wearer's skin). The area of the facing 110 near the opening 112 (the attachment area S1 ) is attached to the fixed end 142 of the jacket 140 . Thereby, the facing 110 forms between the distal side and the sheath 140 attachment areas S1 attached to each other and free areas S2 not attached to each other. Preferably, the face sheet 110 is not attached to each other between the lateral sides and the jacket 140 (the connecting portion 143 of the jacket 140 ), or is attached only in very few places, and the absorber 120 and the face sheet 110 are formed to be suspended In the suspension structure of the enclosure 140 and the back layer 130 .

For the above-mentioned attachment area S1, it may be formed by filled glue; or by heat-sealing both the surface layer 110 and the enclosure 140. It should be understood that the attachment area S1 is the area used to achieve the fixation of the facing 110 , the absorber 120 , and the jacket 140 . In the facing layer 110 corresponding to the attachment area S1 , the facing layer 110 in this area has a relatively low liquid conductivity due to the penetration of the adhesive or the heat sealing effect.

It should be understood that since the topsheet 110 is joined to the absorbent body 120 in a "wrap around the absorbent body 120", the absorbent body 120 can be stably held on the absorbent article even if a small amount of glue is used between the two. Internally, this allows the absorbent body 120 to have a larger contact area with the topsheet 110 on the side facing the wearer's skin, thereby facilitating the rapid entry of liquids into the proximal side of the absorbent body 120 (the top surface of the absorbent body 120 in FIG. 5 ) .

According to the present disclosure, when foreign matter such as urine flows into the topsheet 110 , a part of the foreign matter flows directly downward through the topsheet 110 and is absorbed by the proximal side of the absorber 120 (the top surface of the absorber in FIGS. 5 and 6 ). , another part of the foreign matter flows through the lateral side and the distal side of the absorber 120 (below the absorber 120 ) in sequence along the extending direction of the surface layer 110 and is absorbed on each corresponding side surface of the absorber 120 . This can improve the speed at which the liquid is absorbed, and at the same time, the liquid-absorbing ability of the edge position of the absorbent body 120 is also reflected.

Thanks to the arrangement of the attachment area S1 between the surface layer 110 and the enclosure 140 in the area adjacent to the opening 112 , liquids such as urine can be guided by the surface layer 110 to the position adjacent to the opening 112 . As a result, liquid can be directed at the distal surface of the cover 110 to a location farther from the lateral edge of the diaper 100, more areas of the distal surface of the cover 110 (the lower surface of the cover 110 in FIG. 5) Capable of directly absorbing liquids. This further increases the rate at which liquid is drawn into the absorbent body 120, allowing the wearer to dry out more quickly.

In the embodiments of FIGS. 5 and 6 , in conjunction with FIG. 11 , in order to ensure that the liquid can have a maximum flow distance on the distal surface of the surface layer 110 , the attachment area S1 between the surface layer 110 and the fixed end 142 of the enclosure 140 is from The edge of the facing 110 towards the opening 112 begins to extend. Alternatively, the attachment area S1 may also extend from the edge at a position slightly offset toward the lateral side edge of the diaper 100 . For example, the offset distance is 3 mm, 5 mm, 10 mm, etc.; or 1/20, 1/30, 1/40, etc. of the width W of the diaper 100 . It should be understood that the attachment area S1 in the above range all belongs to the "area near the opening 112". The offset method is especially suitable for the embodiment in which the attachment areas S1 and S3 are formed by gluing, which can prevent the adhesive from overflowing from the opening 112 , so that the absorbent body 120 and the back layer 130 are directly bonded, thereby affecting the diaper 100 performance.

Continuing to refer to FIGS. 5 and 11 , the securing end 142 of the jacket 140 inserted between the topsheet 110 and the backsheet 130 is positioned flush with the corresponding end of the topsheet 110 in the transverse direction of the absorbent article. Thus, the armour 140 and the facing 110 together define a clean-edged opening 112 on the distal side of the absorbent body 120 . The longitudinal center plane of the above-mentioned opening 112 is substantially coincident with the longitudinal center plane of the absorbent article.

Referring to FIG. 6 , an alternative to FIG. 5 is shown, in which the armour 140 extends a short distance distal to the absorbent body 120 and the facesheet 110 is attached to the water repellent backsheet 130 superior. In this embodiment, an attachment relationship is formed between the fixed end 142 of the enclosure 140 and the water repellent backing layer 130 , which facilitates the maximum flow distance of the liquid on the distal surface of the facing layer 110 . For other components of the diaper 100 of this embodiment, reference may be made to the above description about FIG. 5 , which will not be repeated here.

The extension distances of the attachment area S3 and the free area S4 in FIG. 6 can also refer to the related description of FIG. 5 above. In this embodiment, the above-mentioned attachment area S3 may also be formed between the surface layer 110 and the water-repellent back layer 130 by means of filling and applying adhesive, heat sealing, or the like.

Continuing to refer to FIGS. 5 , 6 and 11 , along the lateral direction, the total extension distance L ₁ of the attachment areas S1 , S3 between the surface layer 110 , the enclosure 140 , and the water repellent back layer 130 attached to each other is: 5%*L ≤L ₁ ≤20%*L, where L is the extension distance of the absorber 120 in the lateral direction. In the diagrams of Figures 5, 6, 11, L ₁ is the sum of the lateral extension distances L' of the left attachment areas S1, S3 and the right attachment areas S1, S3. The extension distance L ₁ can ensure the maximum extension distance of the surface layer 110 on the side of the absorbent body 120 away from the wearer's skin on the basis of ensuring that the layers are firmly joined to each other.

For the free areas S2 and S4 formed between the surface layer 110 and the guard 140, according to the size of the diaper 100, preferably, the extension distance D1 of the free areas S2 and S4 in the transverse direction is set to 15mm etc.

As shown in FIG. 5 or 6, the guard 140 extends from the fixed end 142 around the lateral sides of the face sheet 110 to the top side of the face sheet 110 close to the wearer's skin, and its free end 144 extends on the top face. For the free end 144, it is configured with a bend 144 that faces the opening 112 of the lateral side of the absorbent article.

The bend 144 can be seen in FIGS. 5 , 6 and 7( a ) and includes a first portion 146 extending inwardly on the top surface and a second portion 148 extending in the opposite direction from the end of the first portion 146 . The second portion 148 is provided with three or other numbers of elastic bodies 145 extending in the longitudinal direction (corresponding to the BB direction of Fig. 3 ) as shown in Figs. 5 and 6 at the position facing the edge of the absorbent article. Optionally, the first portion 146 and the second portion 148 may also be provided with a vertically extending third portion 147 .

7 in conjunction with FIG. 5 or 6, wherein FIG. 7(a) schematically shows the bent portion 144 in the natural state of FIGS. 5 and 6, and FIG. 7(b) shows just contacting the wearer's leg 7(c)-7(e) schematically show the bent portion 144 after wearing. When the wearer wears the diaper 100, the inner side of the bent portion 144 (corresponding to the top position of the third portion 147) will be pressed first, and the second portion 148 will naturally face outward and tilt upward as shown in FIG. 7 ( a) Enter the intermediate state of Fig. 7(b). The elastic body 145 of the second portion 144 is thereby allowed to move outwardly from the transverse edge OO' of the diaper to avoid compression of the topsheet 110, the backsheet 130, and the like. The elastic body 145 stretches elastically and directly contacts and locks on the thigh of the wearer. As the diaper 100 continues to be lifted up, the first part 146 and the third part 147 on the bent part 144 are pulled by the second part 148 locked on the thigh and gradually stretch out in the lateral direction outward of the diaper 100 . Entering the final state shown in 7(c) and 7(d), when the wearer's leg circumference is large, the bent portion 144 can even finally form the fully extended state shown in Fig. 7(e). It should be understood that in the fully extended state shown in Figure 7(e), the left edge of the bend 144 is substantially flush with the lateral right edge of the facing 110 of Figures 5 or 6 .

Referring to FIG. 11 in conjunction with FIGS. 5 and 6 , the extension distance D with respect to the lateral direction of the bent portion 144 is set to 20 mm, 21 mm, 25 mm, 30 mm, or the like. 7( c )-7 ( e ), the second portion 148 of the bent portion 144 can thereby form a leak-proof area of suitable height in the direction perpendicular to the absorbent body 120 . The leak-proof area will not be too high to cause the liquid to be directly sprayed to the leak-proof perimeter and overflow; at the same time, see Figures 5 and 6, the leak-proof area will not cover more on the side close to the wearer's skin due to its long extension The surface layer 110 reduces the absorption rate of the absorber 120.

Referring to FIG. 3, the diaper 100 is provided with an elastic waistline 160 for elastically attaching the absorbent article to the user. The elastic waistline 160 includes a front waistline region 161 corresponding to the user's abdomen and a rear waistline region 162 corresponding to the user's back waist, and the stretch ratio of the front waistline region 161 is lower than that of the rear waistline region 162 . During breathing by a wearer such as an infant, the wearer may cause the diaper 100 to generate less pressure in an area corresponding to the abdomen due to breathing. The elastic waistline 160 of the above-mentioned form can produce a relatively uniform pressure feeling after being attached to the wearer, thereby bringing a more comfortable user experience to the user.

After the diaper 100 is separated from the wearer's body, the excrement inside the diaper 100 easily overflows from the openings corresponding to the wearer's legs. In order to avoid such a situation, the diaper 100 is provided on the distal surface of the diaper 100 with discarding stickers 131 which are adhesively and laminated together as shown in FIGS. 3 and 4 . The exposed end portion of the discarding post 131 does not have adhesive properties. After use, the user can pull the ends of the discarding frames 131 so that the stacked discarding frames 131 can be unfolded. Then, the user wraps the unfolded discarding sheets 131 around the entire circumference of the diaper 100, so that the discarding sheets 131 are adhered end to end, and the diaper 100 is thus wrapped into a smaller volume. At this time, the opening corresponding to the wearer's leg is closed, and thus foreign matter does not overflow.

Preferably, the discard tab 131 is provided on the diaper 100 at a location corresponding to the back of the wearer.

According to the present disclosure, optionally, the diaper 100 is provided with a wetness display tape 132 extending in the longitudinal direction of the diaper 100 directly below the absorber 120 . The wetness indicator strip 132 is preferably disposed at the lateral center of the diaper 100 . Similarly, the diaper 100 is provided with a wetness indicator 133 extending in the lateral direction of the diaper 100 at a position adjacent to the elastic waistline 160 . The urine wetness display belts 132 and 133 have display agents in them, which can display different colors according to the amount of urine in the diaper 100 . The user can judge whether it is for the wearer to change the diaper 100 according to the shades and colors of the wetness display strips 132 and 133 .

5 and 6, according to a preferred embodiment, an absorbent body cover sheet 150 made of hydrophilic SMS non-woven fabric or absorbent paper is provided between the proximal surface of the absorbent body 120 and the topsheet 110. On the one hand, the absorber cover sheet 150 can quickly transfer urine, etc. to the absorber 120, and on the other hand, the absorber cover sheet 150 helps to cover the granular or powdery material in the absorber 120, preventing the During the production of the diaper 100, the absorbent body 120 forces the above-mentioned materials to leak out due to cutting or pressing.

Different forms of the absorbent cover sheet 150 and the openings 112 formed on the distal surface of the topsheet 110 may affect the overall performance of the diaper 100 . The effect of providing the absorber covering sheet 150 of each form will be described below with reference to the graphs. In each of the embodiments in the following table, except that the material of the absorbent body cover sheet 150 is different, the materials of the remaining corresponding layers between the different embodiments are the same. The form of each diaper 100 is shown in the following table:

Referring to FIG. 8 , it shows the rewet performance of diapers 100 with different absorbent body cover sheets 150 measured by GB/T 28004 rewet amount test method; FIG. 9 shows the corresponding different absorbent body cover sheets 150 Absorbent utilization of the diaper 100.

Combining with Examples 11 and 13, it can be known that the smaller the width of the opening 112 is, the higher the rewet amount will be. For openings 112 having smaller widths, the greater the back pressure experienced by the facing 110 on the distal surface, the greater the amount of rewet.

Combining with Examples 11, 12 and 14, it can be seen that the use of spunlace non-woven fabric as the absorber cover sheet 150 has a high rewet amount, so it is not suitable as a material for making the absorber cover sheet 150 . The absorbent cover sheet 150 of the absorbent paper type has the least amount of permeation.

According to the present application, the width D2 of the opening 112 formed in the distal surface of the absorber 120 by the topsheet 110 is set to 15 mm, 20 mm, 25 mm, or the like.

For the surface layer 110 of the present invention, preferably, it is made of low-water-retention fibers with a water-retention capacity of 20mg/15ml, 30mg/15ml, 40mg/15ml, 50mg/15ml, etc., which are not easy to store water.

The present disclosure also relates to a surface layer 110 having the ability to adjust the moist heat environment inside the diaper 100 . The existing surface layer has the characteristics of weak acidity, however, the applicant has noticed that the surface layer with weak acidity can only significantly inhibit urease in a short period of time. After the wearer wears it for a long time, the weakened effect of the surface layer to inhibit urease will cause the urea to be decomposed to produce ammonia substances that increase the pH value. To this end, the applicant proposes a surface layer that can effectively suppress the increase of the PH value of the diaper for a long period of time. Specifically, the application adds a pH adjuster to the existing surface layer 110 material. The pH adjusting agent is selected from 0.05-1 wt% of tea polyphenols, 0.05-0.1 wt% of octanoyl hydroxamic acid or a mixture of the two. More preferably, the concentration of the pH adjusting agent is 0.05wt% capryloylhydroxamic acid, or a mixture of 0.3wt% tea polyphenols and 0.05wt% capryloylhydroxamic acid. Wherein, the dosage of the pH adjusting agent is preferably 7g/m ² -10g/m ² . The pH value of the pH regulator is 4.5-5.5.

It should be noted that the unit wt% such as the concentration of tea polyphenols and octanoylhydroxamic acid represents the weight ratio of tea polyphenols and octanoylhydroxamic acid in the corresponding pH adjuster. For example, 1wt% of tea polyphenols means that the weight ratio of tea polyphenols in the pH adjuster is 1%, and the remaining components are distilled water. The dosage of pH adjuster refers to the weight of pH adjuster applied per square meter of topcoat.

The following describes the effect of the pH adjuster of each corresponding component in conjunction with the chart. The pH value ratio of each embodiment is referring to the following table:

The weak acid non-woven fabric used in the test was acidified, and its pH value was 4.93. The pH regulator of each embodiment is uniformly coated on each non-woven fabric surface layer 110 by the coating process. The weight of the non-woven surface layer 110 used is 1 g, and the coating is carried out at a dosage of 10 g/m ² .

During the test, 5 mL of urease solution prepared from citric acid-potassium hydroxide buffer solution with a pH value of 6.7 was added to 1 g of the non-woven fabric to be tested. After 5 minutes of full contact, 40 mL of artificial urine was added. Subsequently, at different time points, the pH values of the mixed solutions of each example and comparative example were measured. The data of PH value can be seen in Figure 10, wherein the abscissa of Figure 10 represents time (min) and the ordinate represents PH value.

It can be seen from Examples 1-6 that the acidified non-woven surface layer 110 and the non-acidified ordinary non-woven fabric have no obvious influence on the pH of the diaper 100. Examples 25 and 26 can maintain the pH of the diaper 100 within a preferred range for a long time.

According to the test in FIG. 10, it can be seen that the pH regulator in the above form can better inhibit the urease in urine and feces from decomposing urea to generate ammonia, thereby maintaining the diaper 100 in an ideal pH range.

Although specific embodiments of the present invention have been described above, those skilled in the art will understand that these are merely illustrative and the scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Description of reference numbers:

Diapers: 100;

surface layer: 110;

Absorber: 120;

Back layer: 130;

fencing: 140;

Absorber cover sheet: 150;

Elastic Waist: 160;

opening: 112;

Discard stickers: 131;

Urine display belt: 132, 133;

Fixed end: 142;

Connection part: 143;

Free end, bending part: 144;

Elastomer: 145;

Part one: 146;

Part III: 147;

Part II: 148;

Attachment area: S1, S3;

Free zone: S2, S4;

Front waist area: 161;

Back Waist Zone: 162.

Claims (20)

1. An absorbent article comprising: a topsheet that is in direct contact with the wearer's skin and is configured to allow liquids to pass therethrough; a back layer, the back layer is disposed opposite to the surface layer and is located on the side away from the wearer's skin, wherein the back layer is composed of a breathable and water-impermeable material; an absorbent body disposed between the topsheet and the backsheet for absorbing and entrapping the liquid; and an enclosure comprising a fixed end fixed between the topsheet and the backsheet and a free end opposite the fixed end, the enclosure for preventing the liquid from passing from the absorbent article Lateral side leakage; characterized in that the cover wraps around the absorbent body from the side close to the wearer's skin and forms an opening on the side away from the wearer's skin, and the area of the cover near the opening is attached to the body. on the fixed end of the enclosure or on the back layer. 2. The absorbent article of claim 1, wherein the region where the topsheet and the armour or backsheet are attached to each other extends from the edge side toward the opening. 3. The absorbent article of claim 2, wherein the fixed end of the skirt is inserted between the topsheet and the backsheet, and in a transverse direction of the absorbent article, the The fixed end is flush with the corresponding end of the facing. 4. The absorbent article of claim 1, wherein the longitudinal center plane of the opening substantially coincides with the longitudinal center plane of the absorbent article. 5. The absorbent article of claim 2, in the transverse direction of the absorbent article, the extension distance L1 _of the area where the topsheet and the armour or the backsheet are attached to each other is: 5% _* L≤L1≤20%*L, Wherein, L is the extension distance of the absorber in the lateral direction. 6. The absorbent article of any one of claims 1-5, wherein the skirt surrounds the lateral sides of the topsheet from the fixed end to the top of the wearer's skin side of the topsheet A face extends and a free end extends on the top face, wherein the free end is configured as an open bend toward the lateral side of the absorbent article. 7. The absorbent article of claim 6, wherein the fold includes a first portion extending inwardly of the top surface and a second portion extending in an opposite direction from an end of the first portion. 8. The absorbent article of claim 7, wherein the second portion is provided with at least one longitudinally extending elastic body at a position facing the edge of the absorbent article. 9 . The absorbent article according to claim 8 , wherein, along the lateral direction, the extension distance D of the bent portion on the top surface is: 20mm≦D≦30mm. 10 . 10. The absorbent article of claim 1, wherein the surface layer contains a pH adjuster selected from the group consisting of 0.05-1wt% tea polyphenols, 0.05-0.1wt% octanoyl Hydroxamic acid or a mixture of the two. 11. The absorbent article according to claim 10, wherein the concentration of the pH adjusting agent is 0.05wt% capryloylhydroxamic acid, or 0.3wt% tea polyphenols and 0.05wt% capryloylhydroxime acid mixture. 12. The absorbent article according to claim 10 or 11, wherein the dosage of the pH adjusting agent is 7g/m ² -10g/m ² . 13. The absorbent article according to claim 12, wherein the pH value of the pH value adjusting agent is 4.5-5.5. 14. The absorbent article of claim 1, wherein the absorbent article includes an elastic waist for elastically attaching the absorbent article to a user, the elastic waist including a A front waistline area corresponding to the abdomen of the user and a rear waistline area corresponding to the waist of the user, and the stretching ratio of the front waistline area is lower than that of the rear waistline area. 15. The absorbent article of any one of claims 1-5, wherein the topsheet is spaced apart from the backsheet or skirt in a partial region of the side facing away from the wearer's skin open to form a free area, and the extension distance D1 of the free area along the transverse direction of the absorbent article is: 5mm≤D1≤15mm. 16. The absorbent article of any one of claims 1-5, wherein the absorbent article comprises an absorbent body cover sheet positioned between the topsheet and the absorbent body, the absorbent body The body cover sheet is a hydrophilic SMS nonwoven or absorbent paper. 17. The absorbent article according to claim 16, wherein the width D2 of the opening is: 15mm≤D2≤25mm. 18. The absorbent article according to claim 17, wherein the absorbent body comprises fluff pulp, high molecular water absorbent resin particles or ES fibers. 19. The absorbent article according to claim 1, wherein the surface layer adopts low water retention fiber with a water retention capacity of 20mg/15ml-50mg/15ml. 20. The absorbent article of claim 1, wherein the absorbent article is a pant diaper that can be worn directly.

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