CN113509318A

CN113509318A - Air cushion and core structure for disposable absorption article

Info

Publication number: CN113509318A
Application number: CN202110607192.2A
Authority: CN
Inventors: 聂志强; 邹开东; 周彧峰; 彭海燕; 许飒; 张谭妹; 周峰
Original assignee: Lule Health Technology Co Ltd
Current assignee: Lule Health Technology Co Ltd
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2021-10-19

Abstract

The invention discloses an air cushion for a disposable absorption article, which comprises a protruding part and an embedded part which are integrally formed, wherein the embedded part is arranged at the lower right part of the protruding part; the width of protruding portion is turned to the right side by the left side and is progressively increased, and the left side of protruding portion is inwards sunken to be formed with vacancy portion, and the vacancy portion that the air cushion formed is trilateral spill space of encircleing, plays fine isolation, and has and prevents leaking after and hold the function. The invention also discloses a disposable absorbent article core structure, wherein the right side of the core structure is provided with an air cushion with a gap part, so that the core structure can prevent back leakage and separate skin and excrement within a certain time and a certain degree, and the effect of keeping the skin of the hip part clean is achieved.

Description

Air cushion and core structure for disposable absorption article

Technical Field

The invention relates to the technical field of disposable absorption articles, in particular to an air cushion and core body structure for a disposable absorption article.

Background

From the prior art and the commercial products, the structure and the functional design of the paper diaper are dominated by the conventional fabric, namely, the performance of the paper diaper is improved through the design of the fabric. However, the materials mainly used for the diaper are a high-power resin absorber, a nonwoven fabric, and the like, and the materials used follow a certain physical capillary absorption principle, for example, the same fibers having the same hydrophilic property, and the coarse fibers are easy to conduct liquid to the fine fibers, but two different fibers are required to be concentrated and attached to each other. In addition, under the condition that the number of the non-woven fabric layers is the same, the non-woven fabric is made of fibers with smaller diameters, so that the filtering efficiency can be greatly improved under the condition that the resistance is not increased. Although the diaper made of the resin absorber and the nonwoven fabric follows a certain capillary absorption principle in liquid absorption and drainage, the influencing factors are various and complicated, and no system intensive research is formed at present. The applicant has obtained, according to literature and previous experience: the liquid conduction function of the fiber cannot be exerted to the target that the liquid residue is less than 1g only by controlling the fiber thickness and the hydrophilicity; on the other hand, the limit of the current technical field is reached by adjusting the fineness of the fibers. Aiming at the biggest difficulty of the current paper diaper manufacture: how to lead excrement such as urine into the diaper as completely as possible on the surface of the diaper and prevent reverse osmosis after absorption needs to be a new approach. We cannot be limited to controlling urine reverse osmosis only by fiber thickness matching. At present, there are few related researches on controlling the urine wet rewet through effective isolation, and research and development are carried out by taking the research and development as an entry point.

Disclosure of Invention

In order to overcome the defects of the prior art, one of the purposes of the invention is to provide an air cushion for a disposable absorption article, wherein the gap part formed by the air cushion is a concave space surrounded by three sides, the air cushion has good isolation effect, and has the functions of preventing back leakage and containing.

The invention also aims to provide a core body structure of a disposable absorption article, which can prevent back leakage and separate skin and excrement within a certain time and a certain degree, thereby achieving the effect of keeping the skin of the hip part clean.

One of the purposes of the invention is realized by adopting the following technical scheme:

an air cushion for a disposable absorbent article, the air cushion comprising an integrally formed protruding portion and an embedded portion, the embedded portion being disposed at a lower right side of the protruding portion; the width of the protruding part is gradually increased from the left side to the right side, and the left side of the protruding part is inwards sunken to form a hollow part.

Further, the protruding part is provided with a blocking tail part, a first extending part and a second extending part which are respectively inclined forwards from two ends of the blocking tail part and extend to gradually approach, so that the protruding part is formed with an M-shaped hollow part; the embedded part is arranged at the bottom of the blocking tail part.

Further, two peak positions of the M-shaped hollow part are both arc positions.

Further, the first extension portion and the second extension portion each include a connection end and an extension end, the connection end is one end connected with the blocking tail portion, and the widths of the first extension portion and the second extension portion gradually decrease from the connection end toward the extension end.

Further, the air cushion is an organic silicon rubber air cushion or a polyethylene air cushion.

The second purpose of the invention is realized by adopting the following technical scheme:

the utility model provides a disposable absorption articles for use core structure, includes the core body, still includes the air cushion, the air cushion set up in the right-hand member of core body, the embedding portion embedding of air cushion in the core body, the opening orientation of M shape vacancy portion the left end of core body.

The core body is provided with a core body, and the core body is provided with a flow guide empty groove; one end of the flow guide empty groove is opposite to the opening of the M-shaped empty part, one end of the flow guide empty groove opposite to the opening of the M-shaped empty part is marked as an opposite end, and the vertical distance between the opposite end and the M-shaped empty part is 50-100 mm.

Furthermore, the flow guide empty groove is a linear empty groove which is distributed in a bilateral symmetry mode along the center line of the length direction of the core body, the linear empty groove is divided into a left part and a right part along the center line of the width direction of the core body, and the length ratio of the left end part to the right end part of the linear empty groove is 6 (3-5); the length of the flow guide empty groove is 100-200mm, the width is 8-15mm, and the depth is 2-4 mm.

Further, along the length direction of the core body, the width of the left end of the core body is C, the width of the right end of the core body is B, and the width B is 1.5-2.0 times of the width C.

Further, the embedded part of the air cushion is embedded into the core body downwards, and the vertical distance between the bottom wall of the embedded part and the bottom of the core body is 1-5 mm; the protruding part of the air cushion protrudes upwards from the surface of the core body, and the height of the protruding part is 2-8 mm.

The air cushion further comprises a core body wrapping cloth, wherein the core body wrapping cloth covers the core body and the surface of the air cushion; or the core body and the air cushion are completely wrapped by the core body wrapping cloth.

Compared with the prior art, the invention has the beneficial effects that:

(1) the air cushion for the disposable absorption article provided by the invention has the advantages that the gap part formed by the air cushion is a concave space surrounded by three surfaces, and the air cushion has the function of preventing rear leakage to a certain extent when the disposable absorption article is used, particularly used excessively or used in a saturated mode when excrement is liquid; on the other hand, when the excrement is loose excrement or dry excrement, the vacant part of the air cushion can just contain the excrement, the skin and the excrement are separated within a certain time and to a certain degree, the skin is prevented from contacting the excrement, and the effect of keeping the skin of the hip part area clean is achieved.

(2) The disposable absorbent article core structure provided by the invention adopts the air cushion with a specific structure, so that the back leakage can be prevented, and the skin and excrement can be separated within a certain time and a certain degree, thereby achieving the effect of keeping the skin of the hip part clean.

Drawings

Fig. 1 is a perspective view of a diaper provided in an embodiment of the present invention;

fig. 2 is an expanded schematic view of a diaper provided in an embodiment of the present invention;

fig. 3 is a sectional view of a diaper provided in accordance with an embodiment of the present invention;

FIG. 4 is a top view of a core body provided by an embodiment of the present invention;

FIG. 5 is a schematic view of an air mattress provided by an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a core body provided in accordance with an embodiment of the present invention;

FIG. 7 is a cross-sectional view of an anti-snaring substructure provided in accordance with an embodiment of the present invention;

fig. 8 is a schematic view of a hook and loop fastener according to an embodiment of the present invention;

FIG. 9 is a schematic view of a perforation of an anti-frail substructure according to an embodiment of the present invention;

FIG. 10 is a schematic cross-sectional view of a linear elastomer provided in accordance with an embodiment of the present invention;

FIG. 11 is a schematic view of a secondary folding of the edge leakage prevention partition according to the embodiment of the present invention;

FIG. 12 is a prior art conventional three-dimensional enclosure folding structure;

FIG. 13 shows a round rubber band

Circularly testing a stress-strain diagram;

FIG. 14 is an elliptical rubber band

And (4) circularly testing a stress-strain diagram.

In the figure:

2. a core body; 3. an air cushion; 5. a trousers body; 6. a flow guide empty groove; 8. a liquid permeable top layer; 9. front waist patch; 10. a flow guiding layer; 12. a linear elastomer; 13. the side leakage prevention separation edge; 131. a first turnover body; 132. A second turnover body; 14. waist upper layer material; 15. an elastic waist band; 16. a back waist patch; 17. a magic hook is pasted; 18. the core body is coated with cloth; 20. an inner cloth body; 21. a through hole; 22. hot melt adhesive; 23. an outer cloth body; 24. a leak-proof elastic film; 31. wet strength glue; 32. urine shows glue; 41. arrow-shaped hooks.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In particular, in embodiments of the present invention, the term "upwardly facing" means that the absorbent surface of the absorbent article faces away from the ground and is parallel to the ground; by "vertical to the horizontal plane" is meant that the object is vertical to the ground and is in a parallel state vertically up and down in the corresponding state. The term "in the horizontal direction" means that the direction is parallel to the product surface and parallel to the ground surface.

The disposable absorbent articles described in the embodiments of the present invention include, but are not limited to, infant diapers, training pants, sanitary napkins, menstrual pants, adult diapers, incontinence pants, and the like.

Example 1

As shown in fig. 5, an air cushion for a disposable absorbent article, the air cushion 3 includes a protruding portion and an embedded portion which are integrally formed, and the embedded portion is disposed at the lower right of the protruding portion; the width of the protruding part is gradually increased from the left side to the right side, and the left side of the protruding part is inwards sunken to form a hollow part. The air cushion 3 forms a hollow part which is a concave space surrounded by three sides and has the functions of preventing back leakage and containing. The air cushion provided by the embodiment of the invention can be used on disposable articles such as infant paper diapers, pull-ups, sanitary towels, menstrual pants, adult paper diapers, incontinence pants and the like, the air cushion is arranged on the reabsorption core body, the hip contact part is isolated by the air cushion, only the surface layer has partial urine rewet, and the rewet amount can be controlled to be about 0.1 g; meanwhile, because the middle part of the air cushion is provided with a certain spacing layer (vacancy part), the infiltration speed of excretory fluid such as urine and the like is very fast and is close to zero second.

Further, the protruding portion is provided with a blocking tail portion, a first extending portion and a second extending portion, which are respectively inclined forward from both ends of the blocking tail portion to extend gradually closer (as shown in fig. 5, based on the drawing direction, that is, the first extending portion and the second extending portion are respectively inclined leftward from both ends of the blocking tail portion to extend gradually closer), so that the protruding portion is formed with an M-shaped hollow portion; the embedded part is arranged at the bottom of the blocking tail part. The air cushion 3 is similar to a heart in overall shape, and can just support the ischias of the buttocks, so that the cushion has supporting force and can provide soft and comfortable feeling for a user. Moreover, the air cushion 3 forms an M-shaped hollow part, which can also play a role of isolating partial loose stools when the infants loose stools, and can more quickly make the urine seep downwards as for the urine, thereby playing an isolating role.

Furthermore, two peak positions of the M-shaped hollow part are both arc positions, the design accords with human mechanics, the excrement can be guided and received well, and the use comfort level is high.

Further, as shown in fig. 5, the first extension portion and the second extension portion each include a connecting end and an extending end, the connecting end is one end connected to the blocking tail portion, the widths of the first extension portion and the second extension portion gradually decrease from the connecting end to the extending end, and the extending ends of the first extension portion and the second extension portion of the air cushion 3 form arc-shaped ends.

Further, the air cushion 3 is an organic silica gel air cushion 3 or a polyethylene air cushion 3, and the air cushion 3 made of the two materials can well support the humerus part and is soft and comfortable.

Further, the air cushion 3 is sealed by transparent degradable soft rubber materials, can bear the pressure of 5kpa, and is internally filled with air.

Example 2

As shown in fig. 6, a disposable absorbent article core structure, includes core body 2, still includes air cushion 3, along 2 length direction of core body, air cushion 3 sets up in the right-hand member of core body 2, and the embedding portion embedding core body 2 of air cushion 3 is inside, and the opening of M shape vacancy portion is towards the left end of core body 2. The air cushion 3 is similar to a heart in overall shape, and can just support the ischias of the buttocks, so that the cushion has supporting force and can provide soft and comfortable feeling for a user. Moreover, the air cushion 3 forms an M-shaped hollow part, which can also play a role of isolating partial loose stools when the infants loose stools, and can more quickly make the urine seep downwards as for the urine, thereby playing an isolating role.

Further, as shown in fig. 4, the core body further comprises a flow guide empty groove 6, and the flow guide empty groove 6 is arranged on the core body 2; one end of the flow guide empty groove 6 is opposite to the opening of the M-shaped empty part, the end of the flow guide empty groove 6 opposite to the opening of the M-shaped empty part is marked as an opposite end, and the vertical distance F between the opposite end and the M-shaped empty part is 50-100mm, and is optimally 80 mm. According to the wearing condition of the infant and the position estimation of excretion, the flow guide empty slot 6 can guide the urine to the lower part of the air cushion 3 and diffuse the urine to all sides of the air cushion 3 through the lower part of the air cushion 3. Preferably, one end of the diversion empty groove 6 extends into the M-shaped empty part from the top view, so that excrement can be better guided, and urine can be better diffused particularly.

The diversion empty groove 6 is recessed into the absorption core body on the horizontal plane, the diversion empty groove 6 cannot penetrate through the bottom of the absorption core body, the bottom of the absorption core body is still a continuous piece, and the attractiveness of a product cannot be influenced. The water conservancy diversion air channel 6 vertically sets up along 2 length directions of core body, can introduce the absorption core with the urine fast, indulges transverse diffusion. The diversion empty groove 6 is integrally formed by adopting a negative pressure fiber-accumulating drum through a special die, so that the absorption surface area can be increased when the diversion empty groove is used, and meanwhile, the excrement (mainly urine) along the length direction of the horizontal plane of the absorption core body can be quickly conducted; according to the test results, the diffusion length of the absorbent core using the flow-directing channels 6 is greatly increased, for example by 40mm, compared to the diffusion length of the absorbent core not using the flow-directing channels 6, and the conversion percentage can be increased by 18-20% or even more. The longer the diffusion length of the product is, the larger the urine absorption area is, the lower the rewet amount is, and the better the dryness is.

Further, the flow guide empty groove 6 is a linear empty groove which is distributed along the center line of the core body 2 in the length direction in a bilateral symmetry manner. The straight line empty groove is divided into a left part and a right part along the center line of the width direction of the core body 2, the length ratio of the left end part and the right end part of the straight line empty groove is 6 (3-5), preferably 6:4, as shown in figure 2, the length ratio of the left end part and the right end part of the straight line empty groove is 6: 4; the length of the flow guide empty groove 6 is 100-200mm, and is optimally 180 mm; the width of the flow guide empty groove 6 is 8-15mm, and is 10mm as the best choice; the depth of the flow guide empty groove 6 is 2-4mm, the best choice is 2.5mm, the depth of the flow guide empty groove 6 is controlled to be about 2.5mm, the absorption core body can be ensured not to be perforated, and the water-absorbing resin on a production machine table cannot run out to influence production; meanwhile, the absorbing core is more attractive, and the defect in the middle of the absorbing core body can not be felt. In addition, the diversion grooves 6 may be formed in other shapes, such as a wave-shaped curved shape, a Z-shaped shape, or a shape with a front end and a rear end having different widths, and the diversion grooves 6 may be formed to have uniform depths as a whole in design, but may have different depths, such as a shallow depth of the front end portion and a deep depth of the end near the air cushion 3, and the depth of the diversion grooves 6 gradually becomes deeper from front to rear. The number of the guide grooves 6 is not limited to one, and two, three or other suitable numbers may be provided.

Further, along the length direction of the core body 2, the width of the left end of the core body 2 is C, the width of the right end is B, and the width B is 1.5-2.0 times of the width C. The absorbent core body is a special-shaped cotton core, and the width C of the left end of the core body 2 is preferably 90mm and the width B of the right end is preferably 150mm along the length direction of the horizontal plane. That is, the outer contour of the core body 2 is similar to a side section of a dumbbell with one large end and one small end; compared with the traditional absorbing core, the special-shaped absorbing core has the following advantages: on one hand, the absorption core body has larger absorption area and is more convenient for urine to diffuse; on the other hand, the utility model can wrap the buttocks and is helpful to prevent urine leakage; and thirdly, the whole absorption core body is still maintained, the whole appearance of the product is not affected, and the product is attractive and elegant.

Further, the embedded part of the air cushion 3 is embedded into the core body 2 downwards, and the vertical distance H between the bottom wall of the embedded part and the bottom of the core body 2 is 1-5mm, and is optimally 2 mm; the height of the protruding part of the air cushion 3 is 2-8mm, the highest height of the protruding part is 5mm, and the height of the protruding part is reduced to about 2mm when the infant wears the paper diaper. Preferably, the bottom of the protruding portion of the air cushion 3 is spaced from the surface of the core body 2 by a certain distance, and the two are not in contact, and the height of the topmost surface of the protruding portion is 2-8mm, preferably 5mm, from the surface of the core body 2.

Further, the air cushion also comprises a core body coating cloth 18, and the core body coating cloth 18 covers the surfaces of the core body 2 and the air cushion 3; alternatively, the core wrap 18 completely wraps the core body 2 and the air cushion 3. The air cushion 3 and the core body 2 are covered by the hot air non-woven fabric of the skin-friendly layer from top to bottom together in the process of manufacturing the paper diaper, and are not in direct contact with the skin. The core wrapping cloth is preferably hot air hydrophilic non-woven cloth, spun-bonded hydrophilic non-woven cloth or wet strength paper, and has the function of wrapping the absorption core so that the water-absorbent resin in the absorption core is not exposed.

Further, the core body 2 is formed by mixing wood pulp fibers and SAP (polymer resin), and an air cushion 3 and a flow guide groove 6 are arranged inside the core body 2.

Further, in the preparation process, the core body 2 can be fixed by adopting wet strength adhesive, the wet strength adhesive is a special adhesive type of hot melt adhesive, and the adhesiveness of the wet strength adhesive can be kept more than 80%.

Disposable absorbent articles according to embodiments of the present invention include, but are not limited to, infant diapers, pull-ups, sanitary napkins, catamenial pants, adult diapers, incontinence pants, and the like.

Example 3

As shown in fig. 1 to 3, the present invention is embodied in a diaper for babies and infants, and the direction of the arrow in fig. 2 is a flow direction, which may also be referred to as a longitudinal direction. The paper diaper is bilaterally symmetrical along the center line of the length direction of the paper diaper. An air-cushion type paper diaper is characterized in that a diaper body is formed by bonding a plurality of layers of sheet-shaped non-woven fabrics, a sheet-shaped film and a linear elastic body 12 along the up-down direction, wherein the basis weights of the plurality of layers of sheet-shaped non-woven fabrics are the same or different, preferably the basis weights of at least part of the non-woven fabrics are different, and the non-woven fabrics used for forming each station of the paper diaper comprise but are not limited to hot air non-woven fabrics, melt-blown non-woven fabrics, spun-bonded non-woven fabrics, spunlace non-woven fabrics and the like. The adhesion means between the sheet-like bodies (including nonwoven fabric and sheet-like film) of the pants body includes, but is not limited to, hot-melt adhesive 22 adhesion, hot-roll adhesion, ultrasonic adhesion, and the like. Specifically, this panty-shape diapers include trousers body 5 and set up each part on the trousers body, for example, pass through liquid surface course 8, prevent the edge leakage and separate limit 13, back waist subsides 16, elastic waistline 15, prevent reining in the bottom structure, preceding waist subsides 9, magic hook subsides 17, linear elastomer 12, urine show glue 32 etc..

More specifically, as shown in fig. 2 and 3, in the diaper of the present invention, the structure of the diaper body can be decomposed into components such as the core body 2, the air cushion 3, the liquid permeable surface layer 8, the side leakage prevention barrier 13, the back waist tape 16, the front waist tape 9, the elastic waist band 15, the flow guide layer 10, the anti-strangulation bottom layer structure, the linear elastic body 12, the hook and loop fastener 17, and the urine display adhesive 32. Next, the connection relationship between the respective members will be described.

As shown in fig. 2, the core body 2 is preferably an irregular sheet-shaped body, a shape symmetrical to a central line along the central line is formed on the core body 2, an air cushion 3 is arranged inside the core body 2, the air cushion 3 is sealed by a transparent degradable soft rubber material and can bear 5kpa of pressure, and air is filled inside the core body. A liquid permeable surface layer 8 is vertical to the horizontal plane along the up-down direction, the liquid permeable surface layer 8 is arranged on the core body 2, and the liquid permeable surface layer 8 is in direct contact with the skin of the wearer. The side leakage preventing barrier 13 is arranged above the liquid permeable surface layer 8, and one side of the side leakage preventing barrier 13 close to the core body 2 is fixedly bonded with the liquid permeable surface layer 8. The side leakage preventing barrier 13 is also called a leakage preventing three-dimensional enclosure, and the three-dimensional enclosure formed by the side leakage preventing barrier 13 is fixed on the root of the thigh, the hip and two sides of the pudendum of the infant in a wearing state and is in direct contact with the skin of a wearer. The back waist tape 16 is arranged at one end of the side leakage prevention separation edge 13, the back waist tape 16 is preferably arranged at the right end of the side leakage prevention separation edge 13, namely one end corresponding to the back waist, the two side leakage prevention separation edges 13 are provided with the back waist tapes 16, the back waist tapes 16 can be made of non-woven fabrics, when the diaper is used, the back waist tape 9 is matched with the back waist tape 16 to enable the trousers body 5 and all parts to form a closed diaper, the diaper can not be easily shifted or dropped when in use, and under the condition of normal use, the back waist tape 16 can not be in contact with the skin of a wearer. Elastic waist 15 sets up on the back waist, and elastic waist 15's both ends are connected with two side leakage prevention flange 13 respectively, can erect when panty-shape diapers use, and elastic waist 15 laminating back waist, with wearer's skin direct contact, perhaps, the length of liquidpermeable surface layer 8 is longer, and the extending of liquidpermeable surface layer 8 toward the back waist direction can partly or cover elastic waist 15 completely for elastic waist 15 part is direct not to contact with back waist. The flow guide layer 10 is arranged below the liquid permeable surface layer 8, the flow guide layer 10 is preferably made of non-woven fabric, the flow guide layer 10 can be made of coarse fibers, has a rough hand feeling, is arranged in a product and is not in direct contact with the skin of a wearer, and the coarse fibers are generally fibers of 2D or more, such as 3D fibers; preferably, the diversion layer 10 can be not as long as the core body 2 but as long as the liquid permeable surface layer 8, the diversion layer 10 mainly has the function of helping the product to conduct urine, and meanwhile, the diversion layer 10 plays a role of covering the core body 2 to prevent the water-absorbent resin in the absorption core from leaking; the flow guiding layer 10 is generally longer than the core body 2, and generally can be 80-100mm long, however, the width of the flow guiding layer 10 can be a little narrower than the core body 2, the flow guiding layer 10 is arranged in the center, the front end and the rear end (shown in fig. 2, also called as the left end and the right end of the core body 2) and the middle of the core body 2 are covered, and two side edges of the core body 2 are respectively covered by two side leakage preventing separation edges 13; in other words, the diversion layer 10 and the two side leakage prevention barrier edges 13 together cover the cut of the core body 2, and the water-absorbent resin in the core body 2 is prevented from leaking outside. The anti-tightening bottom structure is arranged below the core body 2, the length and the width of the anti-tightening bottom structure are preferably larger than those of the core body 2, the anti-tightening bottom structure comprises an inner layer cloth body 20 (secondary bottom non-woven fabric), a leakage-proof elastic film 24 and an outer layer cloth body 23 (bottom non-woven fabric), the inner layer cloth body 20 (secondary bottom non-woven fabric), the leakage-proof elastic film 24 and the outer layer cloth body 23 (bottom non-woven fabric) are sequentially arranged from top to bottom, the leakage-proof elastic film 24 is a sheet-shaped film and is also called as a leakage-proof film, the leakage-proof film is not in direct contact with the skin, the outer layer cloth body 23 (bottom non-woven fabric) is arranged below the leakage-proof elastic film 24, the outer layer cloth body 23 is generally selected to be soft, and the non-woven material which is not prone to fluffing is extremely in direct contact with the inner portion of a thigh and a thigh region. Linear elastic bodies 12, the linear elastic bodies 12 are arranged between the side leakage preventing barrier 13 and the anti-strangulation bottom layer structure (preferably between the side leakage preventing barrier 13 and an inner layer cloth body 20 (secondary bottom layer non-woven cloth) of the anti-strangulation bottom layer structure), and the linear elastic bodies 12 are arranged in the side leakage preventing barrier 13, and the linear elastic bodies 12 are mainly concentrated on the thigh periphery and the back waist part and are not in direct contact with the skin. The magic hook sticker 17 is arranged on the rear waist sticker 16, the magic hook sticker 17 is provided with arrow-shaped hooks 41 (shown in figure 8) which are arranged in an array mode, and when the magic hook sticker 17 is used, the arrow-shaped hooks 41 hook loose fibers of the front waist sticker 9 to form physical tension with certain strength. The front waist tape 9 is provided on an outer layer fabric 23 (bottom nonwoven fabric) of the anti-fraying chassis structure, is fixed to a front end portion (also referred to as a left end portion in fig. 2) of the outer layer fabric 23, that is, corresponds to a front waist portion of the user, and the front waist tape 9 faces the elastic waist band 15 provided on the side leakage preventing barrier 13, that is, faces forward and backward (also referred to as left and right facing in fig. 2) along the longitudinal direction of the pants body 5. The urine-sensitive adhesive 32, the color of the urine-sensitive adhesive 32 changes from yellow to green or blue when the diaper is wetted, and the urine-sensitive adhesive 32 is preferably disposed between the inner fabric body 20 (sub-base nonwoven) and the leakage-proof elastic film 24.

Hereinafter, the respective components of the diaper of the present invention will be described in more detail.

Preferably, as shown in fig. 1, both sides of the elastic waistline 15 are bonded and fixed with the side leakage preventing barrier 13 arranged on both sides of the pant body 5, the joint is as shown in the position of 1 circle X, the bonding mode can be ultrasonic bonding, thermal bonding or hot melt adhesive 22 bonding, most preferably ultrasonic bonding, and the second option is thermal bonding, and the alternative option is hot melt adhesive 22 bonding. After the elastic waistline 15 is bonded with the side leakage prevention separation edge 13, the paper diaper is in a tight state in the using process, the elastic waistline 15 can be erected at a certain angle, and a back leakage prevention protection enclosure is formed. The differences between the ultrasonic bonding method, the thermal bonding method, and the hot melt adhesive 22 bonding method will be described in detail below: the ultrasonic bonding technology utilizes high-frequency oscillation to instantly generate friction between molecules in two layers of materials to reach the melting point of the materials for bonding, and has the advantages of firm sewing, softness and no hard block. The thermal bonding is to heat the non-woven fabric material to a melting point through the heating of a thermal bonding roller, and then to perform pressure fusion, and has the advantages of simple equipment, poor welding temperature and strength control, and easy peeling or hard block. The adhesive bonding is the most common way, the hot melt adhesive 22 is sprayed on two layers of materials and is pressurized to reinforce without damaging the materials, the principle is simple, the bad point is that the process is complex to realize, and the production control stability is reduced.

Next, the air cushion 3 and the core body 2 provided with the air cushion 3 will be described in further detail. As shown in fig. 4-6, the cushion 3 includes a protruding portion and an embedded portion formed integrally, the embedded portion being disposed at the lower right of the protruding portion; the left side of the protruding part is inwards sunken to form a hollow part; the embedded portion is embedded in the core body 2.

More specifically, the cushion 3 includes integrally formed protruding portions and embedded portions; the protruding part is provided with a blocking tail part, a first extending part and a second extending part, wherein the first extending part and the second extending part respectively extend forwards from two ends of the blocking tail part and gradually approach (as shown in fig. 5, the first extending part and the second extending part also refer to the first extending part and the second extending part respectively extend from two ends of the blocking tail part to left and gradually approach), so that the protruding part is formed with an M-shaped hollow part; the embedded part is arranged at the bottom of the blocking tail part. The air cushion 3 is similar to a heart in overall shape, and can just support the ischias of the buttocks, so that the cushion has supporting force and can provide soft and comfortable feeling for a user. Moreover, the air cushion 3 forms an M-shaped hollow part, which can also play a role of isolating partial loose stools when the infants loose stools, and can more quickly make the urine seep downwards as for the urine, thereby playing an isolating role.

Furthermore, two peak positions of the M-shaped hollow part are both arc positions, the design accords with human mechanics, the excrement can be guided and received well, and the use comfort level is high. After the diaper is formed, a part of a sunken area is formed in the rear end area of the central line of the diaper perpendicular to the horizontal plane direction in the area of the M-shaped protruding part.

Further, first extension and second extension all include the link and extend the end, the link for with block the one end that the afterbody is connected, the width of first extension and second extension all diminishes from the link towards extending the end step by step, the first extension of air cushion 3 and the extension end of second extension all form the arc end, this kind of setting for the whole shape of air cushion 3 is just like the root of a tooth form, and is strong to the excrement inclusion, and use comfort is high.

As a further embodiment, as shown in fig. 4 and 6, the air cushion 3 is disposed at the right end of the core body 2 along the length direction of the core body 2, the embedded portion of the air cushion 3 is embedded in the core body 2, and the opening of the M-shaped hollow portion faces the left end of the core body 2. The air cushion 3 is similar to a heart in overall shape, and can just support the ischias of the buttocks, so that the cushion has supporting force and can provide soft and comfortable feeling for a user. Moreover, the air cushion 3 forms an M-shaped hollow part, which can also play a role of isolating partial loose stools when the infants loose stools, and can more quickly make the urine seep downwards as for the urine, thereby playing an isolating role.

The diversion empty groove 6 is sunken downwards from the surface of the absorption core body, the diversion empty groove 6 cannot penetrate through the bottom of the absorption core body, the bottom of the absorption core body is still a continuous piece, and the attractiveness of a product cannot be influenced. The water conservancy diversion air channel 6 vertically sets up along 2 length directions of core body, can introduce the absorption core with the urine fast, indulges transverse diffusion. The diversion empty groove 6 is integrally formed by adopting a negative pressure fiber-accumulating drum through a special die, so that the absorption surface area can be increased when the diversion empty groove is used, and meanwhile, the excrement (mainly urine) along the length direction of the horizontal plane of the absorption core body can be quickly conducted; according to the test results, the diffusion length of the absorbent core using the flow-directing channels 6 is greatly increased, for example by 40mm, compared to the diffusion length of the absorbent core not using the flow-directing channels 6, and the conversion percentage can be increased by 18-20% or even more. The longer the diffusion length of the product is, the larger the urine absorption area is, the lower the rewet amount is, and the better the dryness is.

Further, the flow guide empty groove 6 is a linear empty groove which is distributed symmetrically along the center line of the core body 2 in the length direction, the center line of the linear empty groove in the width direction of the core body 2 is divided into a left part and a right part, the length ratio of the left end part and the right end part of the linear empty groove is 6 (3-5), preferably 6:4, as shown in fig. 2, namely the length ratio of the left end part and the right end part of the linear empty groove is 6: 4; the length of the flow guide empty groove 6 is 100-200mm, and is optimally 180 mm; the width of the flow guide empty groove 6 is 8-15mm, and is 10mm as the best choice; the depth of the flow guide empty groove 6 is 2-4mm, the best choice is 2.5mm, the depth of the flow guide empty groove 6 is controlled to be about 2.5mm, the absorption core body can be ensured not to be perforated, and the water-absorbing resin on a production machine table cannot run out to influence production; meanwhile, the absorbing core is more attractive, and the defect in the middle of the absorbing core body can not be felt. In addition, the diversion grooves 6 may be formed in other shapes, such as a wave-shaped curved shape, a Z-shaped shape, or a shape with a front end and a rear end having different widths, and the diversion grooves 6 may be formed to have uniform depths as a whole in design, but may have different depths, such as a shallow depth of the front end portion and a deep depth of the end near the air cushion 3, and the depth of the diversion grooves 6 gradually becomes deeper from front to rear. The number of the guide grooves 6 is not limited to one, and two, three or other suitable numbers may be provided.

Further, as shown in fig. 6, the embedded portion of the air cushion 3 is embedded downward into the core body 2, and the vertical distance H between the bottom wall of the embedded portion and the bottom of the core body 2 is 1-5mm, preferably 2 mm; the protruding part of the air cushion 3 protrudes upwards from the surface of the core body 2, the height of the protruding part is 2-8mm, the highest height of the protruding part is 5mm as the best choice, and in the sitting posture that the baby wears the paper diaper, the protruding 5mm air cushion 3 deforms because the weight of the baby is pressurized, the height is reduced, and the best choice is that the height is reduced to about 2mm of the protruding absorption core. Preferably, the bottom of the protruding portion of the air cushion 3 is spaced from the surface of the core body 2 by a certain distance, and the two are not in contact, and the height of the topmost surface of the protruding portion is 2-8mm, preferably 5mm, from the surface of the core body 2.

Further, as shown in fig. 3, the air cushion further comprises a core covering cloth 18, wherein the core covering cloth 18 covers the core body 2 and the surface of the air cushion 3; alternatively, the core wrap 18 completely wraps the core body 2 and the air cushion 3. The air cushion 33 and the core body 2 are covered by the hot air non-woven fabric of the skin-friendly layer from top to bottom in the process of manufacturing the paper diaper, and are not in direct contact with the skin. The core wrap 18 is preferably a through-air hydrophilic nonwoven, a spun-bonded hydrophilic nonwoven, or wet-strength paper, and functions to wrap the absorbent core so that the water-absorbent resin inside the absorbent core is not exposed.

Further, as shown in fig. 3, wet strength adhesive 31 is used to fix the core body 2, and the wet strength adhesive 31 is a special adhesive type of the hot melt adhesive 22, and can maintain more than 80% of viscosity after wetting.

The arc-shaped cutting angle and the cutting depth formed by the pant body 5 will be described in further detail below.

As a further embodiment, as shown in FIG. 2, the pant body 5 comprises a front waist portion, a rear waist portion, and a crotch portion interconnecting the front and rear waist portions; the connecting part of the front waist part and the crotch part forms a first circular arc, the connecting part of the rear waist part and the crotch part forms a second circular arc, and the radius of the first circular arc is smaller than that of the second circular arc; when the trousers body 5 is unfolded and horizontally and transversely placed, the width of the crotch part is gradually increased along the horizontal direction from the front waist part to the rear waist part; namely, when the trousers body 5 is unfolded and horizontally and transversely placed along the length direction, the height of the horizontal plane where the upper side edge of the crotch is positioned is gradually increased from the left side to the right side, namely, the cutting depth of the crotch on the left side is deeper than that of the crotch on the right side; when the trousers body 5 is unfolded and horizontally placed along the length direction, the structure of the trousers body is vertically symmetrical along the length direction center line, namely, the height of the horizontal plane where the upper side edge of the crotch is located is gradually increased from the left side to the right side, and correspondingly, the height of the horizontal plane where the lower side edge of the crotch is located is gradually reduced from the left side to the right side. The design mode can prevent the front root part and the groin part of the thigh of a user from being tightened when the paper diaper is worn, and can simultaneously prevent the hip part and the rear root part of the thigh from leaking; in the prior art, the front and back cutting depths of the crotch are not finely distinguished.

As shown in fig. 2, the junction of the front waist portion and the crotch portion forms a first arc, the radius of which is designated as radius a, the junction of the rear waist portion and the crotch portion forms a second arc, the radius of which is designated as radius B, and radius a is smaller than radius B. Or if the angle is described, the included angle formed by the joint of the front waist part and the crotch part is represented as R1, the included angle formed by the joint of the rear waist part and the crotch part is represented as R2, the angle of R1 is smaller than that of R2, and the angle of R1 is set to be 40-45 degrees, preferably 45 degrees; the angle of R2 is set to 50-55 °, preferably 50 °. Meanwhile, the right side of the horizontal plane of the upper side edge of the crotch is 15-20mm higher than the left side. The radius of the first arc is smaller than that of the second arc, the angle of the R1 is smaller than that of the R2, in a wearing state, the left end position of the R1 is wrapped in front of thighs, and the right end position of the R2 is wrapped in buttocks, so that the small buttocks can be wrapped by the aid of convenient movement, and the small buttocks cannot leak out.

The liquid-permeable top sheet 8 will be described in further detail below.

As a further embodiment, as shown in fig. 3, the core body 2 is covered with a liquid-permeable surface layer 8, and the liquid-permeable surface layer 8 includes a surface layer upper layer material and a surface layer fiber upper layer, the fiber fineness of the surface layer upper layer material is smaller than that of the surface layer fiber upper layer, and the average fiber length of the surface layer upper layer material is larger than that of the surface layer fiber upper layer. The liquid permeable surface layer 8 adopts upper and lower fiber layers with different fiber fineness and fiber length for reasonable collocation, and has strong liquid transmission and liquid guiding capability and low reverse osmosis rate. In the embodiment of the invention, when the liquid-permeable surface layer 8 is prepared, the surface layer upper layer material and the surface layer fiber upper layer pass through a flow line on a horizontal plane, the surface layer upper layer material bypasses a convex roller, the surface layer fiber upper layer bypasses a concave roller, and finally a surface layer non-woven fabric with a three-dimensional pattern is prepared at a heating smooth roller by compounding and hot rolling.

Further, the upper layer material of the surface layer is a fine fiber material, the fineness of the fine fiber is 1.2D-1.5D, and 1.2D or 1.5D is preferred; the upper layer of the surface layer fiber is coarse fiber material, and the fineness of the coarse fiber is 2.0D-3.0D, preferably 2.0D or 3.0D. The upper layer adopts fine fibers, the lower layer adopts coarse fibers, the discomfort caused by skin contact can not be generated, the liquid is soft and smooth, the liquid guiding effect is good, and the reverse osmosis rate is low.

Further, the upper layer material of the surface layer is a long fiber material, and the cutting length of the long fiber is 45-60mm, preferably 38 mm; the upper layer of the surface layer fiber is a mixture of short fiber and long fiber, the cut length of the short fiber is 30-45mm, and the cut length of the long fiber is 45-60mm, preferably 51 mm.

Further, the non-woven fabric on the upper layer of the surface layer is preferably a fine fiber and long fiber material, and the non-woven fabric on the lower layer of the surface layer is carded by mixing relatively coarse fibers and long and short fibers, or the non-woven fabric on the upper layer of the surface layer is hot air non-woven fabric, and the non-woven fabric on the lower layer of the surface layer is spun-bonded non-woven fabric; the two combination modes can effectively reduce the water content of the surface layer, simultaneously accord with the siphon principle, and can obtain better dry and comfortable experience in the actual use process.

Furthermore, the fibers of the upper layer material of the surface layer are skin-core structural fibers, and the skin-core structural fibers comprise skin layer fibers and core layer fibers which are in concentric circle structures; alternatively, the sheath-core structure fibers include sheath fibers and core fibers in an eccentric configuration. The fibrous melting point of cortex is less than the fibrous melting point of sandwich layer, and the fibrous rigidity of sandwich layer is greater than the fibrous rigidity of cortex, and the sandwich layer has stronger rigidity promptly, can satisfy the surface course and roll into various decorative patterns, and the cortex is the low melting material, mainly plays the adhesive action when hot-blast carding takes shape, and the hot-blast non-woven fabrics of this kind of combination compares in conventional hot-blast non-woven fabrics, feels more fine and more smooth, soft. And, the material of surface course upper strata adopts concentric circles design, and the cortex fusing point is lower, and the sandwich layer rigidity is great, can reflect the knurling effect of surface course better, or the effect of punching, can keep certain shape. In addition, when the material of the upper layer of the surface layer is PE/PET fiber, the upper layer of the surface layer can also be made into an eccentric fiber structure instead of a concentric circle structure, and the liquid guide effect of the eccentric fiber structure is also better.

Further, the upper layer of the surface layer is made of hot air non-woven fabric; the upper layer of the surface layer fiber is hot air non-woven fabric or spun-bonded non-woven fabric. Preferably, the upper layer material of the surface layer and the upper layer of the surface layer fiber are both made of hot air non-woven fabrics, the two types of hot air non-woven fabrics on the horizontal plane pass through a flow line, the upper layer hot air fabric bypasses a convex roller, the lower layer hot air fabric bypasses a concave roller, and finally the surface layer non-woven fabric with the three-dimensional patterns is compounded at a heating smooth roller and is manufactured into a layer through hot rolling.

The paper diaper provided by the embodiment of the invention realizes the effect of low residue of excrement on the surface even approaching zero residue through effective fiber thickness matching and effective isolation.

Next, the elastic waist band 15 will be described in further detail.

As a further embodiment, as shown in fig. 2, the pant body 5 further comprises an elastic waist band 15, the elastic waist band 15 is disposed on the back waist portion, and the elastic waist band 15 comprises three layers of materials, which are respectively denoted as a waist upper layer material 14, a waist middle layer material and a waist lower layer material; the waist circumference upper layer material 14 is a spun-melt non-woven fabric, the waist circumference intermediate layer material is an elastic layer material, preferably an elastic film, or an elastic layer consisting of a plurality of elastic rubber band strips; the waist lower layer material is spun-bonded nonwoven fabric or spun-bonded nonwoven fabric. The elastic waist 15 has stretching and contracting functions in both the longitudinal direction and the width direction. The elastic rubber strips have strong elongation and rebound rate, and the cross section of the linear elastic body 12 is preferably elliptical.

Furthermore, the waistline middle layer material is a flat layer and is arranged in a plane, and the waistline upper layer material 14 and the waistline lower layer material are respectively arranged above and below the middle flat layer in a corrugated shape; preferably, the waist upper layer material 14 is arranged above the middle flat layer in a wave-corrugated manner, and the waist lower layer material is arranged below the middle flat layer in a wave-corrugated manner, so that the arrangement has good contraction performance, and the wearing comfort can be improved.

The manner in which the side leakage prevention barriers 13 are arranged is further described below.

As shown in fig. 12, the conventional side leakage preventing barrier 13 is not folded many times, and is generally formed by folding a non-woven fabric of the barrier once, and an elastic body is arranged in the folded structure; the three-dimensional enclosure side leakage prevention partition edge 13 provided by the embodiment of the invention is turned over at least once on the basis of conventional realization, and the air cushion 3 arranged on the absorption body can prevent rear leakage, and can realize separation of skin and excrement within a certain time and to a certain degree, thereby achieving the effect of keeping the skin of the hip part region clean.

As a further implementation manner, as shown in fig. 3 and 11, the side leakage prevention separation edge 13 provided by the embodiment of the present invention includes a separation edge body, and the separation edge body is folded at least for the first time and the second time to form a multi-fold structure, so that at least four layers of separation edge bodies are formed on one side of the side leakage prevention separation edge 13 close to the crotch of the pants body, wherein an elastic body is arranged between at least two adjacent layers of separation edge bodies; the multi-turn structure comprises a first turn body 131 and a second turn body 132 from bottom to top, and the width of the upper layer partition body of the first turn body 131 is larger than that of the lower layer partition body so as to completely cover the lower layer partition body; both ends of the bottom of the second flip 132 are adhesively fixed to the top surface of the first flip 131 by the hot melt adhesive 22. The partition body is preferably folded twice to form a secondary folding structure, and of course, three or more times of folding can be realized. The folding body is preferably SMS spun-melt non-woven fabric, and the hydrostatic pressure is large, and the folding body is soft and comfortable.

Further, as shown in fig. 2, the elastic body setting stations on the side leakage preventing partition 13 are leg-surrounding contraction bodies respectively arranged at two sides of the body of the diaper in the horizontal direction, and the elastic body on the side leakage preventing partition 13 at each side is preferably 2-5, most preferably 2 or 3, which can provide good contraction capability and does not tighten legs.

Furthermore, the partition body is folded for the first time and folded for the second time to form a twice-folded structure, so that four layers of partition bodies are formed on one side of the side leakage prevention partition 13 close to the crotch of the trousers body, and an oval elastic body is arranged between the two layers of partition bodies on the upper side; the double-folding structure comprises a first folding body 131 and a second folding body 132 from bottom to top, an oval elastic body is arranged in the second folding body 132, and the folding width of the second folding body 132 is 12-15 mm. The three-dimensional enclosure side leakage prevention partition edge 13 provided by the embodiment of the invention is folded outwards once again (in the direction far away from the crotch part) on the basis of the conventional one-time folding partition edge structure, and the folding width is 12-15 mm. In actual production, the method can be realized by the following steps: when the three-dimensional enclosure side leakage preventing partition edge 13 is formed by turning over at one time conventionally, the three-dimensional enclosure side leakage preventing partition edge is folded by a set of folding plates, and the two ends of the non-woven fabric of the three-dimensional enclosure side leakage preventing partition edge 13 are fixed by applying glue discontinuously through the hot melt adhesive 22 before folding, so that the station is realized. Compared with the conventional one-time folding partition edge, the side leakage prevention partition edge 13 formed by twice folding has the following advantages: the contact angle between the common three-dimensional guard side leakage prevention separation edge 13 and the skin at the root of the thigh is between 30 degrees and 90 degrees, and when the linear elastic body 12 clamped by the three-dimensional guard side leakage prevention separation edge 13 acts on the skin of the leg, friction and even strange marks are easily caused at the contact part in the using and moving process of a consumer; however, the contact angle between the linear elastic body 12 wrapped by the secondary-folded three-dimensional enclosure anti-side leakage separating edge 13 and the skin is often reduced to 0-25 °, and under the same acting force, the smaller the contact angle between the three-dimensional enclosure anti-side leakage separating edge 13 and the skin at the root of the thigh is, the smaller the force of the elastic body acting on the skin is, and the reduction range of the skin abrasion or the pinch mark is large.

As a further embodiment, as shown in fig. 10, the elastic body in the side leakage preventing barrier 13 is a leg gather, the elastic body is an elastic band, and the cross section of the elastic body may be a circle, a straight strip or an ellipse, and is most preferably an ellipse. When the radius r of the rubber band with the circular cross section is equal to a, the area of the rubber band with the oval cross section is different when the shortest radius r of the rubber band with the oval cross section is equal to a, and the area of the rubber band with the oval cross section is multiple times of the area of the rubber band with the oval cross section; the ductility and the contractibility of the elastic material are evaluated, and when the stretching ratio of the elastic band with the same material and the elastic band with the oval cross section reaches 3 times, the tension of the elastic band with the same material is several times that of the elastic band with the round cross section. Meanwhile, because the circumferences of the rubber bands are different, the circumference of the rubber band with the oval cross section is longer, and the peel strength and the creep resistance which are tested after the rubber band with the oval cross section and the non-woven fabric wrapped with the elastomer material are bonded by the hot melt adhesive 22 are all times of those of the rubber band with the circular cross section. Synthesize these two kinds of cross section rubber bands's various performances, the part that oval rubber band elastic material used compares in circular cross section rubber band elastic material rubberizing volume more even, and the peel strength is stronger, and the product that shows is softer also has more travelling comfort and ductility.

Further, the edge body is formed by bonding an upper layer of non-woven fabric and a lower layer of non-woven fabric through hot melt adhesive 22, namely the edge body comprises an upper layer of non-woven fabric and a lower layer of non-woven fabric, and the hot melt adhesive is arranged between the upper layer of non-woven fabric and the lower layer of non-woven fabric. In this case, the elastic body is preferably disposed between the two nonwoven fabrics so as to be stably sandwiched therebetween and prevented from being exposed. The upper and lower layers of non-woven fabrics are preferably SMS spun-melt non-woven fabrics, the hydrostatic pressure of the SMS spun-melt non-woven fabrics is more than 120mm of water column, and the SMS spun-melt non-woven fabrics have certain softness. During manufacturing, the elastic body is wrapped between two layers of non-woven fabrics, and the elastic body is folded after being wrapped, which is similar to a Z shape.

The structure of the anti-tie underlayer of an embodiment of the present invention is further described below.

As a further embodiment, as shown in fig. 7 and 9, the anti-fraying layer structure is a cross-sectional view along the length direction, and comprises an inner layer cloth 20, an anti-leakage elastic film 24 and an outer layer cloth 23, wherein the inner layer cloth 20 is fixed above the anti-leakage elastic film 24 in a wave-corrugated shape, the outer layer cloth 23 is fixed below the anti-leakage elastic film 24 in a wave-corrugated shape, and the wave-corrugated folds formed by the inner layer cloth 20 are opposite to the wave-corrugated folds formed by the outer layer cloth 23 one by one; alternatively, the wavy folds formed by the inner cloth body 20 and the wavy folds formed by the outer cloth body 23 are partially or completely staggered up and down. The wavy wrinkles formed by the inner layer cloth body 20 and the outer layer cloth body 23 extend from the front waist portion to the rear waist portion in the worn state. The anti-tightening bottom layer structure provided by the embodiment of the invention adopts a fold design as a whole, the anti-tightening elastic film 24 is in a stretched state when the diaper is worn, the wavy folds of the inner layer cloth body 20 and the outer layer cloth body 23 are straightened and are in a parallel state in the same direction as the anti-tightening elastic film 24, the actual stretching ratio can reach at least 150%, and the design can prevent the diaper from tightening skin or being limited when certain actions are taken in the wearing process. When fixing the wavy wrinkles, the embodiment of the invention adopts comb-shaped frictioning, that is, the frictioning is performed like a comb at certain intervals, the place without glue on the leakage-proof elastic film 24 naturally shrinks, and the place with glue fixes the upper, middle and lower materials (the inner layer cloth body 20, the leakage-proof elastic film 24 and the outer layer cloth body 23), so that the product has elasticity and is very soft. Here, it is preferable that the squeegee width is set to 3mm and the interval is set to 10 mm.

Further, the inner layer cloth body 20 is fixed above the leakage-proof elastic film 24 in a wave-shaped corrugation shape, the maximum width of the wave-shaped corrugation formed by the inner layer cloth body 20 is 5-15mm, and the width of a fixed bonding station of the inner layer cloth body 20 and the leakage-proof elastic film 24 is 1-5 mm. The outer layer cloth body 23 is fixed below the leakage-proof elastic film 24 in a wave-shaped corrugation shape, the maximum width of the wave-shaped corrugation formed by the outer layer cloth body 23 is 5-15mm, and the width of a fixed bonding station of the outer layer cloth body 23 and the leakage-proof elastic film 24 is 1-5 mm.

Further, the inner layer cloth body 20 and the outer layer cloth body 23 are sequentially fixed above and below the leakage-proof elastic film 24 in a regular wavy fold shape, the fixing positions are marked as glue bonding positions, and the glue bonding positions are provided with penetrating holes 21. The penetrating hole 21 can quickly penetrate out hot air outside the skin, and the stuffy feeling is not generated, so that the wearing experience is more comfortable. The adhesive strength is reduced by punching the adhesive position, but the product is softer, and the product can achieve the effect of ventilation and is not unsightly because the product is in a semi-telescopic state when in use. During production, the perforation is preferably performed by needle puncture. As shown in fig. 9, the glue site is actually planar, and here the glue site is drawn in a stripe shape in order to show the penetration holes 21, and the penetration holes 21 are provided at the overlapped bonding positions of the inner fabric body 20, the leakproof elastic film 24, and the outer fabric body 23.

Further, the penetrating hole 21 is a micro circular hole.

Further, the inner layer cloth body 20 is fixed above the leakage-proof elastic film 24 in a regular semi-circular tube corrugated shape, the outer layer cloth body 23 is fixed below the leakage-proof elastic film 24 in a regular semi-circular tube corrugated shape, and the semi-circular tube corrugations formed by the inner layer cloth body 20 and the semi-circular tube corrugations formed by the outer layer cloth body 23 are opposite up and down one by one. That is, the inner layer cloth 20 and the outer layer cloth 23 are provided symmetrically with respect to the leakage-proof elastic film 24 as a plane of symmetry, and can be stretched in a replaceable manner during use, and are soft and comfortable.

Further, the leakage-proof film is a polyurethane elastic film, and the inner layer cloth body 20 and the outer layer cloth are both non-woven fabrics.

The paper diaper provided by the embodiment of the invention comprises a diaper body 5, a core body 2 and an air cushion 3 arranged on the core body 2. The body of the paper diaper comprises a surface layer non-woven fabric (liquid-permeable surface layer 8) and a cavity formed by a bottom layer non-woven fabric (outer fabric body 23 of anti-strangling bottom layer structure), a sheet film (anti-leakage elastic film 24 of anti-strangling bottom layer structure) and a secondary bottom layer non-woven fabric (inner fabric body 20 of anti-strangling bottom layer structure) which are arranged under the surface layer non-woven fabric and perpendicular to the horizontal plane, wherein the cavity is internally provided with a wrapping non-woven fabric (core wrapping fabric 18) wrapping a core body, the core wrapping fabric 18 wraps the core body 2 in an omega shape from top to bottom, the core body is internally embedded with an air cushion 3, the core body 2 is provided with a hollowed groove (flow guide hollow groove 6) along the central line of the length direction, and a certain distance is reserved between the hollowed groove and the air cushion 3; the three-dimensional protecting and enclosing partition edge non-woven fabric (the side leakage prevention partition edge 13) is folded outwards twice along the central line of the length direction perpendicular to the horizontal plane; the bottom layer structure is provided with regular folds, and the bonding part is provided with air holes. The paper diaper provided by the embodiment of the invention has the advantages of good liquid guiding capacity, good elastic contractibility, excellent anti-strangulation effect and high wearing comfort.

Effect verification

1. Air cushion shaped core structure performance test

In order to test that the paper diaper provided with the air cushion 3 and the diversion empty groove 6 has better performance, the paper diapers of several types are compared and tested according to different core structures of the paper diapers (except for different core structures, other parts are the same) in the embodiment of the invention, and the test basis and the test result are shown in the following table 1.

Table 1 core structure performance test result recording table

From the data in table 1, the following conclusions can be drawn:

A. the paper diaper with the air cushion and the diversion trench has the fastest absorption speed, which is nearly 50% faster than that of the common paper diaper without the air cushion and the diversion trench;

B. the paper diaper with the air cushion and the diversion trench has the best dryness, and the rewet amount is only about 1/25 of the common paper diaper compared with the common paper diaper;

C. the slip amount of the diaper with the air cushion and the diversion trench is zero, and the diaper without the air cushion and with the diversion trench (the diaper control sample 2) is easy to cause urine leakage. Therefore, the core body structure with the air cushion and the flow guide grooves provided by the embodiment of the invention has optimal performance.

2. Circular rubber band and oval rubber band cycle test

In order to verify the performance of the round elastic body and the oval elastic body, the round elastic band and the oval elastic band are subjected to a cycle test.

2.1 test purposes

The stress-strain test is carried out on the rubber bands with different cross sections and the same type by adopting the same test method, and the stress test of the two different rubber bands is compared.

2.2 test conditions

2.2.1 sample and basic set-up

TABLE 2 sample and basic set-up

Length of test piece	50mm
		Type of test	Cycle testing
Initial load	0.29cN
		Capacity selection	10kg

2.2.2 cycle test procedure

TABLE 3 Cyclic test procedure

3. Test results

3.1 circular rubber band-

Figure 13 is a round rubber band-

And (4) circularly testing a stress-strain diagram.

3.2 elliptical rubber band-

Figure 14 is an elliptical rubber band-

And (4) circularly testing a stress-strain diagram.

TABLE 4 significance of tension and Return force codes

Morphable code	Of significance
		TP101	1st stretch	100% deformation
TP201	1st stretch				200% deformation
		TP301	1st stretch	300% deformation
TM103	1st recovery of 300% deformation
		TM102	1st recovery of 200% deformation
TM101	1st recovery of 100% deformation
		TP201	2nd elongation 100% deformation
TP202	2nd elongation 200% deformation
		TP203	2nd elongation 300% deformation
TM203	2nd recovery of 300% deformation
		TM202	2nd recovery of 200% deformation
TM201	2nd recovery of 100% deformation
		TP301	3rd tensile 100% deformation
TP302	3rd tensile 200% deformation
		TP303	3rd tensile 300% deformation
TM303	3rd tensile 300% deformation
		TM302	3rd tensile 200% deformation
TM301	3rd tensile 100% deformation
		TP401	4th elongation 100% deformation
TP402	4th stretch 200% deformation
		TP403	4th elongation 300% deformation
TM403	4th recovery rate is 300%Amount of deformation
		TM402	4th recovery of 200% deformation
TM401	4th recovery of 100% deformation
		TP501	5th elongation 100% deformation
TP502	5th stretch 200% deformation
		TP503	5th elongation 300% deformation
TM503	5th recovery of 300% deformation
		TM502	5th recovery of 200% deformation
TM501	5th recovery of 100% deformation

TABLE 5 specific values of tensile and restoring forces

The following conclusions can be drawn from the records of FIGS. 13-14, and tables 3-5:

A. using the same test method pair

The rubber band test has 10 rubber bands with circular and elliptical cross sections, and data analysis shows that the test results of each rubber band have very small group difference and very good repeatability.

B. The larger the cross section area is, the larger the pulling force and the restoring force are; are the same as

The tension and the restoring force of the elliptical rubber band are about 3.0 times of those of the circular rubber band, and are 1.4-1.6 times of those of the circular rubber band.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. An air cushion for disposable absorbent articles, wherein said air cushion comprises an integrally formed protruding portion and an embedded portion, said embedded portion being disposed at the lower right of said protruding portion; the width of the protruding part is gradually increased from the left side to the right side, and the left side of the protruding part is inwards sunken to form a hollow part.

2. The cushion for disposable absorbent articles of claim 1, wherein said protruding portion is provided with a blocking tail portion, a first extension portion and a second extension portion, said first extension portion and said second extension portion respectively extending obliquely forward from both ends of said blocking tail portion to come closer together, so that said protruding portion is formed with an M-shaped hollow portion; the embedded part is arranged at the bottom of the blocking tail part.

3. The cushion for disposable absorbent articles of claim 2, wherein said first extension and said second extension each include a connecting end and an extending end, said connecting end being the end connected to said barrier tail, said first extension and said second extension each having a width that gradually decreases from said connecting end toward said extending end.

4. The cushion for disposable absorbent articles of claim 1, wherein said cushion is a silicone cushion or a polyethylene cushion.

5. A disposable absorbent article core structure, comprising a core body, characterized in that, further comprising an air cushion according to any one of claims 1 to 4, said air cushion is disposed at the right end of said core body, the embedded portion of said air cushion is embedded in said core body, and the opening of said hollow portion is toward the left end of said core body.

6. The disposable absorbent article core structure of claim 5, further comprising a flow-directing void disposed on said core body; the air-guiding structure is characterized in that the air-guiding part is an M-shaped air-guiding part, one end of the air-guiding groove is opposite to the opening of the M-shaped air-guiding part, the end, opposite to the opening of the M-shaped air-guiding groove, of the air-guiding groove is marked as an opposite end, and the vertical distance between the opposite end and the M-shaped air-guiding groove is 50-100 mm.

7. The disposable absorbent article core structure of claim 6, wherein said flow-guiding empty slot is a straight empty slot, said straight empty slot is symmetrically distributed along the center line of said core body in the length direction, said straight empty slot is divided into two parts, the left part and the right part, along the center line of said core body in the width direction, the length ratio of said straight empty slot left end part and said straight empty slot right end part is 6 (3-5); the length of the flow guide empty groove is 100-200mm, the width is 8-15mm, and the depth is 2-4 mm.

8. The disposable absorbent article core structure of claim 5 wherein said core body has a width C at the left end and a width B at the right end along the length of said core body, said width B being 1.5-2.0 times the width C.

9. The disposable absorbent article core structure of claim 5 wherein said air cushion insert is downwardly inserted into said core body, the vertical distance between the bottom wall of said insert and the bottom of said core body being 1-5 mm; the protruding part of the air cushion protrudes upwards from the surface of the core body, and the height of the protruding part is 2-8 mm.

10. The disposable absorbent article core structure of claim 5, further comprising a core wrap covering the surfaces of said core body and said air cushions; or the core body and the air cushion are completely wrapped by the core body wrapping cloth.