CN107361924B

CN107361924B - Anti-leakage edge-separating body-fitting connecting part capable of preventing inner sides of legs from being stressed and manufacturing method thereof

Info

Publication number: CN107361924B
Application number: CN201710672329.6A
Authority: CN
Inventors: 李建灵; 张强; 苏立炜
Original assignee: Baron China Co ltd
Current assignee: Baron China Co ltd
Priority date: 2017-08-08
Filing date: 2017-08-08
Publication date: 2021-01-01
Anticipated expiration: 2037-08-08
Also published as: CN107361924A

Abstract

The invention relates to a fit leakage-proof absorption product, which comprises a liquid-permeable surface layer, a liquid-impermeable bottom layer and a dumbbell-shaped absorption core, wherein a left leakage-proof separation edge and a right leakage-proof separation edge are respectively arranged at two sides of the absorption product in the width direction, each leakage-proof separation edge comprises a base part, a free part and a telescopic part which is connected to the free part and is positioned at the upper end of the free part, an elastic body is arranged in the telescopic part, so that the leakage-proof separation edges have elastic retractility in the longitudinal direction, and the fit leakage-proof absorption product is characterized in that: each leakage-proof separation edge further comprises a body fitting connecting part arranged between the base part and the free part, the body fitting connecting part is arranged at the edge positions of the two longitudinal sides of the crotch part of the dumbbell-shaped absorption core, and when the absorption product is in a natural relaxation three-dimensional state, the leakage-proof separation edge at the joint between the free part and the body fitting connecting part is inwards contracted along the width direction of the crotch part of the dumbbell-shaped absorption core, and each leakage-proof separation edge forms a three-dimensional arc-shaped leakage-proof separation edge in the width direction of the absorption product.

Description

Anti-leakage edge-separating body-fitting connecting part capable of preventing inner sides of legs from being stressed and manufacturing method thereof

Technical Field

The invention relates to the technical field of disposable sanitary products, in particular to a leakage-proof edge-isolating fit connecting part capable of preventing the inner side of a leg from being stressed and a preparation method thereof.

Background

Generally, infant absorbent articles include baby diapers, pull-offs, and the like, all constructed of multiple layers of materials, including inner surface materials, absorbent materials, and the like. Along with the improvement of living standard of people, the baby diaper has the advantages of convenient carrying and cleanness, so the baby diaper is more and more widely applied. Infant absorbent articles are more and more elegant, comfortable and practical, and the application of infant absorbent articles is convenient for people to nurture infants.

Due to the fact that the traditional process is adopted, the paper diaper is thick and heavy, inconvenience is brought to movement of the infant, the diaper is prone to lump formation and fault formation after long-time use, the crotch of the infant is prone to being squeezed, inconvenience is brought to movement of the infant, meanwhile harm is brought to health of the infant, and healthy growth of the infant is affected. For infants to wear more comfortably, there is a transition from bulky absorbent materials to ultra-thin absorbent materials. But because the ultra-thin product has the characteristics of lighter, thinner and more comfortable, the ultra-thin product is more and more popular.

Present panty-shape diapers are still mostly put the design focus on the leak protection, prevent various troubles and inconvenience that the urine seepage brought, do not annotate heavily the panty-shape diapers and should adapt to the curved mode of tailorring of baby's buttock, be not conform to human engineering, especially for the leak protection and the heavy panty-shape diapers of design are fairly big to the inboard pressure of baby's shank, it is so more after the inner core adsorbs the urine, it is inconvenient to cause baby's activity, it can bring harm to baby's health to use for a long time, influence baby's healthy growth. Therefore, the patent with the publication number of CN203089561U provides a golden double-arc multi-layer core body diaper, which comprises a strip-shaped inner core body arranged in the diaper, wherein the inner core body is provided with concave arc lines for abdicating legs, and the concave arc lines are symmetrically arranged on two sides of the central line of the inner core body along the length direction of the inner core body; the inner core body comprises two end parts and a middle part positioned between the two end parts along the length direction of the inner core body, the width of the middle part is smaller than the width of the two end parts, the two ends of the middle part are respectively connected with the end parts through transition sections, and the transition sections are naturally connected from the middle part to the two end parts in a transition mode in a gradually widening mode. By accurately cutting the radian of the crotch part, a golden ratio double arc is formed, so that the inner sides of the legs of the baby are not stressed, the baby is more comfortable and fit after being worn on the body, and the movement is more convenient and free; and on the basis of ensuring the dryness and leakage prevention of the paper diaper, the paper diaper is lighter, thinner and more breathable, and the inner core body is not broken and does not stick together, thereby being beneficial to the healthy growth of the baby.

However, although the prior art sets the absorbent core of the diaper as an absorbent core with an arc-shaped crotch, also called a dumbbell-shaped absorbent core, the leg circumference and the leakage-proof separation edge are arranged on the disposable absorbent article, and the leakage-proof separation edge stands up to be in a U-shaped three-dimensional state during use, so the leakage-proof separation edge still continuously rubs the skin of the leg of the wearer, and scratches, even red swelling and inflammation appear on the skin. Therefore, on the basis of the existing leakage-proof separation edges, the proper body connecting part is arranged, so that when the absorbent product is in a natural loose three-dimensional state, the leakage-proof separation edges at the connecting part between the free part and the proper body connecting part are inwards shrunk along the width direction of the crotch part of the dumbbell-shaped absorbent core, and each leakage-proof separation edge forms a three-dimensional arc-shaped leakage-proof separation edge in the width direction of the absorbent product, so that the problem that the leakage-proof separation edges rub against the skin of the legs of a wearer is avoided, and meanwhile, the leakage-proof separation edges are inwards shrunk towards the crotch part of the absorbent core, so that the absorbent product is more proper to wear, and has a better close.

Disclosure of Invention

The invention aims to solve the technical problems and provide a method for preventing leakage of a paper diaper, which can ensure that leakage-proof separation edges are inwards shrunk along the width direction of a crotch part of a dumbbell-shaped absorption core according to the body size proportion of the baby, so that the inner sides of legs of the user are free from pressure, the phenomenon of dragging, rubbing or pinching the inner side skin of thighs of the user (infant) is avoided, the close fitting effect is better, and the absorbent article is more suitable for wearing and more comfortable.

In order to achieve the above object, the present invention is achieved by the following technical solutions: the anti-leakage partition edge fit connection part enables the inner sides of the leg parts to be free of pressure and comprises anti-leakage partition edges, the anti-leakage partition edges are composed of a left anti-leakage partition edge and a right anti-leakage partition edge which are arranged on two sides of the width direction of an absorption product and respectively extend along the longitudinal direction, and a dumbbell-shaped absorption core is arranged in the absorption product; each leakage-proof separating edge comprises a base part, a free part connected to the base part and positioned at the upper end of the base part, and a telescopic part connected to the free part and positioned at the upper end of the free part, wherein an elastic body is arranged in the telescopic part, so that the leakage-proof separating edges have elastic flexibility in the longitudinal direction, and the leakage-proof separating edge is structurally characterized in that:

each leakage-proof partition edge is formed by folding a spun-bonded melt-blown non-woven fabric with certain water pressure resistance to form an expansion part, an elastic body is arranged in the expansion part, a first spun-bonded melt-blown non-woven fabric and a second spun-bonded melt-blown non-woven fabric which are positioned below the expansion part and connected with the expansion part are completely overlapped and bonded to form a free part, the first spun-bonded melt-blown non-woven fabric is compounded between a liquid-permeable surface layer and a liquid-impermeable bottom layer, and the second spun-bonded melt-blown non-woven fabric is compounded on the liquid-impermeable bottom layer;

each leakage-proof separation edge is provided with a proper body connecting part, the proper body connecting parts are arranged at the edge positions of the two longitudinal sides of the crotch part of the dumbbell-shaped absorption core and are connected with the second spunbonded melt-blown non-woven fabric, so that when the absorption product is in a natural relaxation three-dimensional state, the proper body connecting parts enable the leakage-proof separation edges at the connecting part of the free part and the proper body connecting parts to shrink towards the boundary direction of the absorption product, and each leakage-proof separation edge forms a three-dimensional arc leakage-proof separation edge in the width direction of the absorption product.

In a specific embodiment, the fit connecting parts are symmetrically arranged along the longitudinal side boundary of the width direction of the dumbbell-shaped absorbent core crotch, the distance between the fit connecting parts and the longitudinal side boundary of the crotch is 0-5mm, and the discontinuous distance between the fit connecting parts and the base is 3-20 mm.

The two ends of the transverse width of the dumbbell-shaped absorbent core at the crotch position gradually shrink along the central point of the absorbent core to form two symmetrical longitudinal side boundaries of the crotch, wherein the crotch position is in an arc-shaped curve or an arc-shaped broken line. The fit connecting part of each leakproof isolation edge consists of at least one connecting point distributed along the longitudinal side boundary of the crotch, the connecting point is formed by ultrasonic wave, infrared wave and heat seal pressing or is formed by gluing, and the distribution track formed by the connecting points comprises one connecting point or point distribution formed by two connecting points, or one of arc line continuous distribution, straight line continuous distribution, arc discontinuous distribution and straight line discontinuous distribution formed by more than two connecting points.

Each leakage-proof separating edge is formed by folding and integrally forming a non-woven fabric with certain water pressure resistance, wherein the base part of each leakage-proof separating edge is combined with the surface layer or the liquid-tight bottom layer, the combined part is internally coated with elastic bodies distributed along the longitudinal side edge of the base part to form leg bands, and the width longitudinal direction boundary of each leakage-proof separating edge exceeds the longitudinal boundary of the absorption core and is flush with the longitudinal boundary of the liquid-tight bottom layer.

The liquid-tight bottom layer is formed by bonding a bottom membrane and bottom membrane non-woven fabrics with certain water pressure resistance from top to bottom, the transverse width of the bottom membrane non-woven fabrics is larger than that of the bottom membrane, each leakage-proof separation edge is integrally formed after the bottom membrane non-woven fabrics are folded, the base part of each leakage-proof separation edge is formed by bonding the bottom membrane non-woven fabrics with a surface layer or the bottom membrane after the bottom membrane non-woven fabrics are folded towards the longitudinal central line direction of the absorbing product, and then the bottom membrane non-woven fabrics are continuously upwards extended and then are inwards or outwards folded and bonded to form a telescopic part of each leakage-proof separation edge.

The liquid-tight bottom layer is formed by bonding a bottom membrane and bottom membrane non-woven cloth with certain water pressure resistance from top to bottom, the transverse width of the bottom membrane non-woven cloth is larger than that of the bottom membrane, and each leakage-proof separation edge is integrally formed after the bottom membrane non-woven cloth is folded. As a further preferred scheme, the folded base film nonwoven fabric integrally forms a base part including the leakage-proof barrier formed by the base film nonwoven fabric which is folded inwards along the longitudinal boundary of the absorbent article and is bonded with the surface layer or the base film in an adhesive manner, and then the base film nonwoven fabric extends upwards and is folded inwards or outwards to form a telescopic part of each leakage-proof barrier.

In the leakproof isolation boundary expansion part, the elastic body comprises fixed ends at two ends of the elastic body and an elastic section positioned between the two fixed ends, the stretch ratio of the elastic section is 1.3-2.9, a plurality of wrinkles are formed on the elastic section, the wrinkles respectively and continuously extend on the elastic bodies, and the fixed ends are fixed on the material of the expansion part.

The invention also provides a novel leakage-proof separating edge structure, wherein a heat-seal anti-seepage body is arranged along the longitudinal side boundary of the inner side width direction of the base part of each leakage-proof separating edge, and each leakage-proof separating edge is connected with the liquid-tight bottom layer or each leakage-proof separating edge, the liquid-tight surface layer and the liquid-tight bottom layer in a hot-rolling manner from top to bottom in the thickness direction of the absorbent product by the heat-seal anti-seepage body. In some embodiments, the heat sealed barrier integrally connects each of the containment flaps, the liquid permeable top sheet, and the liquid impermeable bottom sheet together by a heat seal layer. The heat-seal seepage-proofing body can effectively prevent urine from seeping from the gap between the leakage-proofing partition edge and the liquid-tight bottom layer along the transverse width direction of the dumbbell-shaped absorption core, so that the urine is prevented from seeping from two sides of the leg, and the possibility of side leakage is reduced.

Aiming at the leakage-proof edge-separating fit-connecting part which can prevent the inner sides of the legs from being pressed, the invention also provides a manufacturing method of the leakage-proof edge-separating fit-connecting part, which comprises the following steps:

firstly, positioning an area of an expansion part and a free part area which is continued outwards from the expansion part on the spunbonded melt-blown non-woven fabric;

secondly, spirally spraying the hot-melt pressure-sensitive adhesive special for the elastomer in the expansion part area, so that the hot-melt pressure-sensitive adhesive has stronger cohesive force, prevents spandex filaments in the expansion part from generating creep deformation, and simultaneously, coating and scraping the adhesive on the inner adhesive surface of the free part area, including the first spun-bonded melt-blown non-woven fabric and the second spun-bonded melt-blown non-woven fabric;

thirdly, compounding spandex filaments with the stretch ratio of 1.3-2.9 on the region of the expansion part, folding the spun-bonded melt-blown non-woven fabric in half along the longitudinal direction of the outer edge of the spandex filaments on the outer side, coating the spandex filaments, and simultaneously connecting the first spun-bonded melt-blown non-woven fabric and the second spun-bonded melt-blown non-woven fabric in a bonding manner;

and finally, the first spunbonded melt-blown non-woven fabrics which are connected with the first spunbonded melt-blown non-woven fabrics and the second spunbonded melt-blown non-woven fabrics of the free part and are positioned below the free part are respectively folded outwards in opposite directions, the first spunbonded melt-blown non-woven fabrics are compounded between the liquid-permeable surface layer and the liquid-impermeable layer, the second spunbonded melt-blown non-woven fabrics are compounded on the liquid-impermeable bottom layer, and the proper connecting part of each leakage-proof partition edge is positioned by adopting infrared rays and is jointed by generating connecting points.

Aiming at the body fitting leakage-proof absorbent product, the invention also provides a manufacturing method of the body fitting leakage-proof absorbent product, which comprises the following steps:

step 1: and (3) compounding the leg surrounding elastic body on the liquid-tight bottom layer material to obtain a bottom layer material structure layer.

Step 2: and compounding the dumbbell-shaped absorption core on the bottom material structure layer.

And step 3: forming a base part of the leakproof isolation boundary, a free part and an expansion part coated with an elastic body.

And 4, step 4: and (3) conveying and performing longitudinal and transverse stretching processes.

And 5: and positioning the proper connecting part of each leakage-proof separation edge by adopting infrared rays and generating a joint connecting point.

Step 6: and cutting off the excess material of the arc-shaped leg circumference.

And 7: cutting into single pieces, and folding and packaging.

In the specific implementation process, in the step (3), the leakage-proof separation edges are integrally formed by folding the non-woven fabric with certain water pressure resistance, and the method specifically comprises the following steps:

step S1: a plurality of elastic bodies are combined on the leakage-proof edge-separating material, and are folded and pressed by the flanging groove and the flanging guide roller to form a telescopic part, and then the leakage-proof edge-separating material is compounded on the two longitudinal sides of the liquid-permeable surface layer to form the base part.

Step S2: and (3) compounding the liquid-permeable surface layer obtained in the step (S1) on the dumbbell-shaped absorption core obtained in the step (2), wherein the peripheries of the two longitudinal side edges of the liquid-permeable surface layer are connected to the liquid-impermeable bottom layer in a gluing mode, and the middle area between the two longitudinal side edges is compounded on the dumbbell-shaped absorption core.

In the concrete implementation process, in step (1), the liquid-tight bottom layer is formed by bonding from top to bottom a basement membrane, a basement membrane non-woven fabric with certain water pressure resistance, and the transverse width of the basement membrane non-woven fabric is greater than that of the basement membrane, and the leakproof isolation edge of step (3) is formed by folding the basement membrane non-woven fabric into a whole at the same time, and specifically comprises:

in the step (1), the method further comprises the steps of spirally spraying glue on the bottom membrane non-woven fabric, compounding the leakage-proof edge-separating elastic bodies on the bottom membrane non-woven fabric, wherein the interval between the leakage-proof edge-separating elastic bodies and the leg surrounding elastic bodies in the transverse width direction is 5-10cm, and the leakage-proof edge-separating elastic bodies and the leg surrounding elastic bodies are arranged in parallel in the length longitudinal direction to obtain a prefabricated body. And after the prefabricated body is conveyed and transversely stretched, the non-woven fabric of the bottom film is folded along the outer longitudinal side edge of the leakage-proof edge-separating elastic body through a flanging groove and a flanging guide roller and is folded inwards or outwards, and the leakage-proof edge-separating elastic body is coated in the two folding layers. In step (1), the composite of the absorbent article closing system is also included, which comprises a front waist tape, left and right magic tapes matched with the front waist tape and an elastic waistline jointed on the bottom layer material.

In the step (3), the position corresponding to the base of the leakage-proof separation edge is subjected to glue scraping treatment, then the non-woven fabric of the bottom film is folded along the outer longitudinal side edge of the leg surrounding elastic body through a flanging groove and a flanging guide roller and is attached to the liquid-permeable surface layer and/or the bottom film after being folded inwards, and the base of the leakage-proof separation edge, the telescopic part and the free part between the base and the telescopic part are formed through the pressing effect of a roller.

The invention has the following beneficial effects: on guaranteeing the basis of the dry and comfortable leak protection of panty-shape diapers, provide one kind according to baby's size proportion, separate the limit with the leak protection and inwards shrink along the crotch portion width direction of dumbbell type absorption core, make baby's shank inboard can not receive pressure, the effect next to the shin is better for dress more fit's absorbent article, baby dresses back more comfortable fit on one's body, and it is more convenient, free to move about. Meanwhile, the arranged heat-seal seepage-proofing body can effectively prevent urine from seeping from the gap between the leakage-proofing separation edge and the liquid-tight bottom layer along the transverse width direction of the dumbbell-shaped absorption core, so that the urine is prevented from seeping from two sides of the leg, and the possibility of side leakage is reduced.

Drawings

Fig. 1 is a schematic structural view of the fit leakage preventing absorbent articles of examples 1, 2, and 3.

Fig. 2 is a schematic sectional structure view of embodiment 1 and embodiment 2 with respect to a-a of fig. 1.

Fig. 3 is a schematic view of the arc-shaped intermittent distribution of the fit-on-body connecting part of the embodiment 3.

Fig. 4 is a schematic view showing the arc-shaped continuous distribution of the fit-on-body connecting part of embodiment 3.

FIG. 5 is a schematic sectional view showing A-A of FIG. 1 in accordance with embodiment 4.

FIG. 6 is a schematic sectional view showing A-A of FIG. 1 in accordance with embodiment 5.

FIG. 7 is a schematic structural view of the fitted leak-proof absorbent article of example 6.

FIG. 8 is a schematic sectional view of embodiment 6 with respect to B-B of FIG. 7.

FIG. 9 is a schematic representation of the construction of the heat-sealed barrier of example 6.

FIG. 10 is a schematic representation of the multi-layer fold configuration of the heat-sealed barrier of example 6.

Detailed Description

For a further understanding of the invention, the terms used herein are defined as follows:

the term "absorbent article" refers to articles for absorbing and containing human excreta (urine, feces, menstrual blood), and pertains to disposable sanitary products, i.e., articles which are not used after the sanitary articles absorb liquids and tend to saturate or contain feces and other such materials, but enter a waste recycling system, and includes baby diapers, baby pull-off pants, adult diapers and the like.

The term "liquid-permeable top layer" refers to a nonwoven fabric having a surface treated to be hydrophilic and having excellent permeability to liquid, which is also called nonwoven fabric, including hot-air nonwoven fabric, hot-rolled nonwoven fabric, spun-bonded nonwoven fabric, spunlace nonwoven fabric or needle-punched nonwoven fabric, all of which are well-known prior art materials to those of ordinary skill in the art.

The term "liquid-impermeable bottom layer" is formed by compounding a breathable bottom film and bottom film non-woven fabrics from top to bottom, wherein the bottom film woven fabrics comprise spun-bonded non-woven fabrics, spun-bonded melt-blown non-woven fabrics and hot-rolled non-woven fabrics. The spun-bonded melt-blown non-woven fabric type comprises SMS and SMMS, wherein S represents a spun-bonded structural layer, and M represents a melt-blown structural layer.

The term "dumbbell-shaped absorbent core" refers to the absorbent core whose transverse width gradually shrinks along the central point of the absorbent core at the two ends of the crotch, forming two symmetrical longitudinal side boundaries of the crotch with the crotch in an arc curve or arc fold line, the dumbbell-shaped absorbent core is also called as an "8" -shaped absorbent core in the industry, and comprises the traditional absorbent core formed by uniformly blending wood pulp fibers and super absorbent resin, two layers of absorbent cores and dust-free paper layers or expanded paper, at least comprising an upper absorbent core and a lower absorbent core, and the two layers of absorbent cores and the dust-free paper layers or the expanded paper are compounded and connected into a whole through an adhesive layer from top to bottom. Wherein, the upper absorbing core body and the lower absorbing core body both use hot air fluffy non-woven fabrics as framework supporting materials, and super absorbent resin is combined between fiber grids of the hot air fluffy non-woven fabrics.

The adhesive bonding means that two or more layers of materials are bonded and compositely connected through a hot melt adhesive layer by adopting a hot melt adhesive (also called hot melt pressure sensitive adhesive), wherein the leakproof isolation edge spandex filament and the leg surrounding spandex filament are made of elastomer hot melt adhesives with high cohesive force, and the liquid permeable surface layer, the liquid impermeable bottom layer and the dumbbell-shaped absorption core are made of structural hot melt adhesives with high cohesive force. The elastomer hot melt adhesive and the structural hot melt adhesive used in the invention are all materials in the prior art, and the hot melt machine used in the invention is all existing equipment which is well known by ordinary technical personnel in the industry. The use temperature of the hot melt adhesive is set to be 130-160 DEG C

For a further understanding of the invention, reference will now be made in detail to the accompanying drawings.

Example 1

The body-fitting leakproof absorbent article 1 of this embodiment employs a dumbbell-shaped absorbent core 12, as shown in fig. 1, whose transverse width is gradually narrowed along the center point of the absorbent core at both ends of the crotch portion 7 to form two symmetrical crotch longitudinal side boundaries in which the crotch portion 7 is positioned in an arc-shaped curve or an arc-shaped broken line.

As shown in fig. 1 and fig. 2, the body fitting leakage-proof absorbent article 1 according to the present embodiment includes a liquid-permeable surface layer 11, a liquid-impermeable bottom layer 10, and a dumbbell-shaped absorbent core 12 disposed between the liquid-permeable surface layer 11 and the liquid-impermeable bottom layer 10, wherein leakage-proof separation edges 3 extending along a longitudinal direction are respectively disposed on two sides of the absorbent article 1 in a width direction, each leakage-proof separation edge 3 includes a left leakage-proof separation edge 3a and a right leakage-proof separation edge 3b, wherein each leakage-

proof separation edge

3a, 3b is formed by folding a nonwoven fabric with certain water pressure resistance, such as a spunbonded nonwoven fabric or spunbonded melt-blown nonwoven fabric, and the longitudinal width direction boundaries of the leakage-

proof separation edges

3a, 3b exceed the longitudinal boundary of the dumbbell-shaped absorbent core 12 and are flush with the longitudinal boundary of the liquid-impermeable bottom layer 10.

As shown in fig. 2, each leakage barrier comprises a base 31, a free part 32 connected to the base 31 and positioned at the upper end of the base 31, and a flexible part 33 connected to the free part 32 and positioned at the upper end of the free part 32, wherein elastic bodies 34 are arranged in the flexible part 33, the base 31 of the leakage barrier is bonded with the liquid-permeable surface layer 11 or the liquid-impermeable bottom layer 10 at the periphery, the elastic bodies 2 distributed along the longitudinal side edges of the base 31 are covered at the bonding position to form leg girth,

the

elastic bodies

2 and 34 can be flat rubber roots and spandex filaments, and are preferably spandex filaments in the embodiment, wherein the spandex filaments in the leakage-proof edge-separating expansion part enable the leakage-

proof edges

3a and 3b to have elastic expansion in the longitudinal direction, the spandex filaments in the leakage-proof edge-separating expansion part comprise fixed ends at two ends of the spandex filaments and an elastic section located between the two fixed ends, the stretching ratio of the elastic section is 1.3-2.9, a plurality of folds 8 are formed on the elastic section, the folds respectively extend continuously on the spandex filaments, and the fixed ends are fixed on a non-woven fabric material of the leakage-proof edges of the expansion part.

As shown in fig. 2, each leakage-proof barrier further comprises an adaptive connecting portion 6 disposed between the base portion 31 and the free portion 32, the adaptive connecting portion 6 is disposed at the edge position of both sides in the longitudinal direction of the crotch portion 7 of the dumbbell-shaped absorbent core 12, and when the absorbent article 1 is in a natural loose three-dimensional state, the adaptive connecting portion 6 allows the leakage-

proof barriers

3a and 3b at the connection between the free portion 32 and the adaptive connecting portion 6 to inwardly contract along the width direction of the crotch portion 7 of the dumbbell-shaped absorbent core, and each leakage-proof barrier forms a three-dimensional arc-shaped leakage-proof barrier in the width direction of the absorbent article.

In this embodiment, the present absorbent article further includes a closing system for fixing the absorbent article on the wearer, such as a front waist tape 14, left and right hook tapes 5 used in cooperation with the front waist tape, and an elastic waist band 4 for adjusting the wearing tightness and comfort of the absorbent article, or an elastic waist band of a big ear.

The three-dimensional arc-shaped leakage-proof separation edge formed by the embodiment enables the body-fitting leakage-proof absorbent product 1 to be more suitable for the body of the leakage-proof separation edge positioned at the crotch position when the body-fitting leakage-proof absorbent product is in a wearing state (a U-shaped state), and the body-fitting leakage-proof separation edge cannot drag, rub or strangle the skin on the inner thigh of a user (infant), so that the body-fitting leakage-proof absorbent product is more comfortable.

Example 2

In this example, the fit body joint parts 6 were symmetrically arranged along the longitudinal side boundary in the width direction of the crotch part 7 of the dumbbell-shaped absorbent core, as shown in fig. 1, on the basis of the fit body leakage preventing absorbent article 1 provided with the fit body joint parts 6 obtained in example 1, and the distance between the fit body joint parts 6 and the longitudinal side boundary of the crotch part 7 was 0 to 5 mm. As shown in figure 2, the intermittent distance between the body fitting connecting part 6 and the base part 31 is 3-20 mm.

Example 3

The fit connection is made up of at least one connection point distributed along the longitudinal side border of the crotch portion. The distribution track formed by the connecting points comprises a point distribution formed by one connecting point or two connecting points, and one of arc line continuous distribution, straight line continuous distribution, arc discontinuous distribution and straight line discontinuous distribution formed by more than two connecting points can be selected. The connection points may be hot pressed by ultrasonic, infrared, or heat sealing, but may be made by hot melt adhesive bonding in some embodiments.

As shown in fig. 1, the present embodiment is directed to

embodiments

1 and 2, in which the distribution locus of the fit-to-body connecting portion 6 is continuously distributed by straight lines distributed along the longitudinal side boundary of the crotch portion 7.

As shown in fig. 3, the body fitting connection part 6b is composed of three connection points, two adjacent connection points are intermittently distributed on an arc line with a certain separation distance, that is, the three connection points are sequentially connected to form an arc line or an arc curve, and the distribution tracks of the three connection points form arc intermittent distribution.

As shown in fig. 4, the distribution locus of the fit-to-fit connecting portion 6c is continuously distributed by arcs distributed along the longitudinal side boundaries of the crotch portion 7.

In addition, the distribution track of the fit connection part can also adopt linear intermittent distribution, and the linear intermittent distribution refers to that the two adjacent connection points are intermittently distributed on a straight line at a certain separation distance.

Example 4

In this embodiment, the structure of the absorbent article 1 is the same as that of embodiment 1 except that the structure of the leakage barriers 3 is different from that of embodiment 1.

As shown in fig. 5, the leakage-proof barrier 3 of the present embodiment is made of spunbond meltblown nonwoven fabric (SMS or SMMS), each leakage-

proof barrier

3a, 3b is formed by folding a spunbond meltblown nonwoven fabric with a certain water pressure resistance to form an expansion portion 33, spandex filaments are arranged in the expansion portion, the spunbond meltblown nonwoven fabric 32a and the spunbond meltblown nonwoven fabric 32b which are located under the expansion portion and connected to the expansion portion 33 are completely overlapped and bonded to form a free portion 32, and the spunbond meltblown nonwoven fabric 32a is combined between the liquid-permeable top sheet 11 and the liquid-impermeable bottom sheet 10, and the spunbond meltblown nonwoven fabric 32b is combined on the liquid-impermeable bottom sheet 10, in the specific embodiment of the present embodiment, the method includes the following steps:

first, the area of the stretch 33 and the free portion area continuing outward from the stretch are located on the spunbond meltblown nonwoven.

Secondly, carry out the spiral to the pars contractilis region and spout the glue, this glue belongs to the special hot melt pressure sensitive adhesive of elastomer, has stronger cohesion, prevents that the spandex silk in the pars contractilis from producing the creep, simultaneously to the pars contractilis region, including the spun-bonded melt-blown non-woven fabrics 32a, the interior adhesive surface of spun-bonded melt-blown non-woven fabrics 32b carries out the coating frictioning, also can adopt big spiral to spout gluey.

And compounding spandex filaments with the stretch ratio of 1.3-2.9 on the expansion part area, folding the spun-bonded melt-blown non-woven fabric in half along the longitudinal direction of the outer edge of the outer spandex filament to coat the spandex filaments, and simultaneously attaching and connecting the spun-bonded melt-blown non-woven fabric 32a and the spun-bonded melt-blown non-woven fabric 32 b.

Finally, the spunbond meltblown nonwovens 31a and 31b connected to the

spunbond meltblown nonwovens

32a and 32b at the free portions and located under the

spunbond meltblown nonwovens

32a and 32b are folded outward in opposite directions, respectively, the spunbond meltblown nonwoven 31a is combined between the liquid-permeable top sheet 11 and the liquid-impermeable bottom sheet 10, and the spunbond meltblown nonwoven 31b is combined on the liquid-impermeable bottom sheet 10, and a suspended dumbbell-shaped absorbent core 12 is formed. In some embodiments, a wrapping 13 is disposed about dumbbell absorbent 12.

Example 5

As shown in fig. 6, the liquid-tight bottom layer 10 is formed by bonding a bottom film 10a, a bottom film non-woven fabric 10b with a certain water pressure resistance from top to bottom, the bottom film 10a includes a casting bottom film, a breathable bottom film, preferably a breathable bottom film, but the transverse width of the bottom film non-woven fabric 10b of the embodiment is greater than the transverse width of the bottom film 10a, and each leakage-proof separation edge 3a, 3b is integrally formed after the bottom film non-woven fabric 10b is folded, and the liquid-tight bottom layer includes: the basement membrane 10a is compound on basement membrane non-woven fabric 10b in the middle, by two longitudinal sides of basement membrane non-woven fabric 10b width direction respectively along the longitudinal border of absorbent article 1 or basement membrane 10a after turning over inwards folding back and with liquid permeability surface course 10 or basement membrane 10a adhesive bonding and form leak protection flange 3, including the basal portion 31 of leak protection flange 3a, 3b, then this basement membrane non-woven fabric 10b continues upwards to extend back inwards or outwards folding bonding and form the pars contractilis 33 of each leak protection flange 3a, 3b, is equipped with the spandex silk in pars contractilis 33, and the free portion is located between basal portion 31 and pars contractilis 33.

Example 6

As shown in fig. 7 and fig. 8, this embodiment provides a novel leakproof isolation edge structure on the basis of the fitted leakproof absorbent article of embodiment 1, in addition to the fitted connecting portion 6d (the distribution track is linear and discontinuous), a heat-sealing impervious body 15 is arranged along the longitudinal side boundary of the inner side width direction of each leakproof isolation edge base portion 31, and the heat-sealing impervious body 15 at least connects each leakproof isolation edge and the liquid-impermeable bottom layer into a whole through a heat-sealing layer.

As shown in fig. 9, in the present embodiment, the base 31, the liquid-permeable top sheet 11 and the liquid-impermeable back sheet 10 of each leakproof barrier 3 are integrally bonded by the adhesive bonding layer 16, wherein the base 31 is a single-layer spunbonded melt-blown nonwoven fabric, and then the heat-sealing barrier 15 is provided along the longitudinal side boundary in the width direction of the inner side of the base 31 of each leakproof barrier, and the heat-sealing barrier 15 integrally bonds the base 31, the liquid-permeable top sheet 11 and the liquid-impermeable back sheet 10 of each leakproof barrier 3 by the heat-sealing layer 17, which is formed by roll hot-pressing under ultrasonic, infrared and heat-sealing conditions, and the hot-pressing temperature is 120 ℃ to 170 ℃.

In some embodiments, in order to solve the problem that the base 31 made of the single-layer structure spunbond meltblown nonwoven fabric is damaged due to too high hot pressing temperature or too low gram weight of the spunbond meltblown nonwoven fabric during the roll hot pressing process, the base 31 made of the single-layer structure spunbond meltblown nonwoven fabric may be configured as the base 31 made of the multilayer structure spunbond meltblown nonwoven fabric, as shown in fig. 10, the base 31 made of the multilayer structure spunbond meltblown nonwoven fabric is formed by folding the spunbond meltblown nonwoven fabric multiple times at the position corresponding to the heat-seal barrier 15 to form a multilayer structure, in this embodiment, the spunbond meltblown nonwoven fabric is preferably formed by folding the spunbond meltblown nonwoven fabric two times at the position corresponding to the heat-seal barrier 15 to form a three-layer structure spunbond meltblown nonwoven fabric, and after the roll hot pressing, the spunbond meltblown nonwoven fabric and the spunbond meltblown nonwoven fabric are between the three-layer structure spunbond nonwoven fabrics and between the three-layer structure spunbond meltblown nonwoven fabrics, The liquid-permeable top sheet 11 and the liquid-impermeable back sheet 10 form fusion-bonded points therebetween, and the fusion-bonded points are collected to form the heat-laminated layer 17.

In the embodiment, the heat-sealing impermeable body 15 is arranged at the base of the leakproof isolation edge, and each leakproof isolation edge is connected with the liquid-tight bottom layer or each leakproof isolation edge, the liquid-tight surface layer and the liquid-tight bottom layer by the heat-sealing impermeable body 15 from top to bottom in the thickness direction of the absorbent product in a hot-pressing manner. In some embodiments, the two longitudinal side edges of the liquid-permeable surface layer are folded inwards along the longitudinal side edges of the dumbbell-shaped absorbent core and then are combined between the dumbbell-shaped absorbent core and the liquid-impermeable bottom layer, and the heat-sealing impervious body 15 is used for connecting each leakproof isolation edge with the liquid-impermeable bottom layer in a hot-pressing manner from top to bottom in the thickness direction of the absorbent product. Comprises a leakage-proof separation edge, a liquid-tight bottom layer or a leakage-proof separation edge, a liquid-tight surface layer and a liquid-tight bottom layer. In other embodiments, the middle region of the liquid-permeable top layer is combined with the dumbbell-shaped absorbent core, the two longitudinal sides of the liquid-permeable top layer are outwardly extended and then the peripheries of the two longitudinal sides of the liquid-permeable top layer are glued on the liquid-impermeable bottom layer, and the heat-sealing impervious body 15 is used for connecting each leakage-proof barrier, the liquid-permeable top layer and the liquid-impermeable bottom layer in a hot-pressing manner from top to bottom in the thickness direction of the absorbent product. Various patterns can be arranged on the surface layer of the heat-seal impervious body 15.

The function of the heat-seal impervious body 15 is based on that urine transversely seeps out from the gap between the leakproof isolation edge and the liquid-tight bottom layer due to poor absorption in the process of absorbing liquid, further, urine seeps from both sides of the leg portion, which causes a serious leakage problem and also loses the use significance of the absorbent article, and this is because once urine flows on the surface of the super absorbent resin particles, namely, the particles are accommodated by the super absorbent resin particles, and the super absorbent resin particles can expand after absorbing urine, the colloid surface of the expanded super absorbent resin is sticky, the colloid blocking phenomenon is easy to occur, and the subsequent urine is difficult to permeate through the absorption core such as a common straight strip type absorption core and a dumbbell type absorption core and then diffuse, so that urine seeps out from the space between the leakage-preventing barrier and the liquid-impermeable back sheet in the transverse width direction of the absorbent core. The heat seal seepage-proofing body 15 can effectively prevent urine from transversely diffusing and seeping to two sides along the gap between the leakage-proof separation edge and the liquid-tight bottom layer, so that the urine is prevented from seeping from two sides of the leg, the possibility of side leakage is reduced, and the problems in the prior art are effectively solved.

Example 7

The embodiment provides a manufacturing method of a fit body leakage-proof absorption product, wherein spandex filaments are adopted for leg surrounding elastomers and leakage-proof edge separation elastomers; the liquid-permeable surface layer is made of hot air non-woven fabric, and the liquid-impermeable bottom layer is formed by compounding a bottom membrane and bottom membrane non-woven fabric from top to bottom, wherein the bottom membrane is a breathable bottom membrane, the bottom membrane non-woven fabric can be selected from spun-bonded non-woven fabric with the structure of SS and spun-bonded melt-blown non-woven fabric with the structure of SMMS or SMMMS; the anti-leakage separation edge adopts spun-bonded melt-blown non-woven fabric with the structure of SMMS, and the steps comprise the following steps:

the method comprises the following steps: and (3) compounding the leg-surrounding spandex filaments on the liquid-tight bottom layer material to obtain a bottom layer material structure layer.

Step two: and compounding the dumbbell-shaped absorption core on the bottom material structure layer.

Step three: forming a base part of the leakproof isolation boundary, a free part and an expansion part coated with an elastic body.

Step four: and (3) conveying and performing longitudinal and transverse stretching processes.

Step five: and positioning the proper connecting part of each leakage-proof separation edge by adopting infrared rays and generating connection point joint.

Step six: and cutting off the excess material of the arc-shaped leg circumference.

Step seven: cutting into single pieces, and folding and packaging.

In some embodiments, the leakproof isolation boundaries in the step (three) are integrally formed after the spunbonded melt-blown nonwoven fabric is folded, and the method specifically comprises the following steps:

step S1: firstly, glue is discontinuously sprayed on the spunbonded melt-blown non-woven fabric material of the leakage-proof separation edge in the longitudinal direction, and the glue spraying position corresponds to the corresponding position of the two longitudinal ends of the absorbent product; the spandex filaments are transversely arranged on the leakage-proof edge-separating material at intervals in a stretching state with the stretching ratio of 1.3-2.9, the leakage-proof edge-separating material is folded along the longitudinal direction of the spandex filaments on the outer layer by adopting a flanging groove and a flanging guide roller, the spandex filaments are wrapped between two layers of leakage-proof edge-separating materials, a plurality of spandex filaments are combined on the spunbonded melt-blown non-woven fabric of the leakage-proof edge-separating material and are pressed to form a telescopic part, and then the spunbonded melt-blown non-woven fabric is compounded on the two longitudinal sides of the liquid-permeable surface layer to form a base part and a free part of the leakage-proof edge-separating.

Step S2: and (D) compounding the liquid-permeable surface layer obtained in the step (S1) on the dumbbell-shaped absorption core obtained in the step (II), wherein the peripheries of the two longitudinal side edges of the liquid-permeable surface layer are connected to the liquid-impermeable bottom layer in a gluing mode, and the middle area between the two longitudinal side edges is compounded on the dumbbell-shaped absorption core.

In other specific embodiments, the leakage-proof barrier of step (three) is formed by folding and integrally forming a spunbond melt-blown nonwoven fabric used as the bottom film nonwoven fabric, wherein the spunbond melt-blown nonwoven fabric used as the bottom film nonwoven fabric has the structure of SMMS spunbond melt-blown nonwoven fabric, and the liquid-impermeable bottom layer is formed by bonding a breathable bottom film and the spunbond melt-blown nonwoven fabric.

In the step (one), the transverse width of the spunbonded melt-blown non-woven fabric is larger than the transverse width of the breathable basement membrane, meanwhile, discontinuous glue spraying, preferably spiral glue spraying, is carried out on the spunbonded melt-blown non-woven fabric, and leakproof edge separation spandex filaments are compounded on the spunbonded melt-blown non-woven fabric, the interval between the leakproof edge separation spandex filaments and the leg surrounding spandex filaments in the transverse width direction is 5-10cm, and the leakproof edge separation spandex filaments and the leg surrounding spandex filaments are arranged in parallel in the length longitudinal direction to obtain a prefabricated body.

And after the prefabricated body is conveyed on spandex filaments and transversely stretched, carrying out edge folding on the spunbonded melt-blown non-woven fabric along the outer longitudinal side edge of the leakproof edge-separating spandex filaments by a flanging groove and a flanging guide roller, and folding inwards or outwards, wherein the leakproof edge-separating spandex filaments are coated in the two layers of folding layers.

And (C) in the step (III), performing glue scraping treatment on the position corresponding to the base of the leakage-proof separation edge, then folding the spunbonded melt-blown non-woven fabric along the outer longitudinal side edge of the leg-surrounding spandex filaments through a flanging groove and a flanging guide roller, folding the folded spunbonded melt-blown non-woven fabric inwards, attaching the folded spunbonded melt-blown non-woven fabric to the liquid-permeable surface layer and/or the air-permeable bottom film, and forming the base of the leakage-proof separation edge, the telescopic part and the free part between the base and the telescopic part through the pressing effect of a.

In some more preferred embodiments, each leakage-proof barrier is formed by folding a spunbonded melt-blown nonwoven fabric with certain water pressure resistance to form an expansion part, spandex filaments are arranged in the expansion part, a first spunbonded melt-blown nonwoven fabric and a second spunbonded melt-blown nonwoven fabric which are positioned below the expansion part and connected with the expansion part are completely overlapped and bonded to form a free part, the first spunbonded melt-blown nonwoven fabric is combined between a liquid-permeable surface layer and a liquid-impermeable bottom layer, and the second spunbonded melt-blown nonwoven fabric is combined on the liquid-impermeable bottom layer.

In the step (V), point gluing is carried out on the surface layer of the liquid-permeable surface layer or the inner surface layer of the leakproof isolation edge at the position of the body-fitting connecting part by adopting a pressure-sensitive hot melt adhesive machine, and then pressing treatment is carried out on the body-fitting connecting part by adopting a convex part which is arranged on a roller and corresponds to the position of the body-fitting connecting part, so as to form the connecting point. In addition to joining the liquid-permeable top sheet or the leakproof isolation margins by spot gluing, ultrasonic welding or other joining techniques commonly used in the art may also be used.

In addition, the composite of the absorbent article closure system comprises a front waist tape, left and right magic tapes matched with the front waist tape and an elastic waistline jointed on the bottom layer material.

Although the present invention has been described with reference to specific embodiments, the scope of the present invention is not limited to the above-described embodiments, and various modifications, changes, and substitutions may be made without departing from the spirit of the present invention.

Claims

1. The anti-leakage partition edge fit connection part enables the inner sides of the leg parts to be free of pressure and comprises anti-leakage partition edges, the anti-leakage partition edges are composed of a left anti-leakage partition edge and a right anti-leakage partition edge which are arranged on two sides of the width direction of an absorption product and respectively extend along the longitudinal direction, and a dumbbell-shaped absorption core is arranged in the absorption product; each leakage-proof separating edge comprises a base part, a free part connected to the base part and positioned at the upper end of the base part, and a telescopic part connected to the free part and positioned at the upper end of the free part, wherein an elastic body is arranged in the telescopic part, so that the leakage-proof separating edges have elastic flexibility in the longitudinal direction, and the leakage-proof separating edge is characterized in that:

each leakage-proof separation edge is provided with a proper body connecting part which is arranged at the edge positions of two longitudinal sides of the crotch part of the dumbbell-shaped absorption core and connected with the second spun-bonded melt-blown non-woven fabric, so that when the absorption product is in a natural loose three-dimensional state, the leakage-proof separation edge at the joint of the free part and the proper body connecting part is contracted towards the boundary direction of the absorption product by the proper body connecting part, and each leakage-proof separation edge forms a three-dimensional arc leakage-proof separation edge in the width direction of the absorption product;

the fit connecting part of each leakproof isolation edge is formed by point distribution formed by one connecting point or two connecting points distributed along the longitudinal side boundary of the crotch, and the connecting points are formed by ultrasonic, infrared and heat seal pressing or by gluing; or the three-point connection structure consists of three connection points, two adjacent connection points are discontinuously distributed on an arc line at a certain separation distance, and the distribution track of the three connection points forms arc-shaped discontinuous distribution, or in more than two connection points, two adjacent connection points are discontinuously distributed on a straight line at a certain separation distance to form linear discontinuous distribution.

2. A leak-proof bulkhead fitting for protecting the inside of a leg from pressure as claimed in claim 1, wherein: the fit body connecting part is arranged between the base part and the free part and symmetrically arranged along the longitudinal side boundary of the width direction of the crotch of the dumbbell-shaped absorption core, the distance between the fit body connecting part and the longitudinal side boundary of the crotch is 0-5mm, and the discontinuous distance between the fit body connecting part and the base part is 3-20 mm.

3. A leak-proof bulkhead fitting for protecting the inside of a leg from pressure as claimed in claim 1, wherein: and the heat-seal anti-seepage body is arranged along the longitudinal side boundary of the inner side width direction of the base part of each leakage-proof partition edge, and the heat-seal anti-seepage body is used for connecting each leakage-proof partition edge with the liquid-tight bottom layer or each leakage-proof partition edge, the liquid-tight surface layer and the liquid-tight bottom layer in a hot-pressing manner from top to bottom in the thickness direction of the absorbent product.

4. A leak-proof bulkhead fitting for protecting the inside of a leg from pressure as claimed in claim 1, wherein: the liquid-tight bottom layer is formed by bonding a bottom membrane and bottom membrane non-woven fabrics with certain water pressure resistance from top to bottom, the transverse width of the bottom membrane non-woven fabrics is larger than that of the bottom membrane, each leakage-proof separation edge is integrally formed after the bottom membrane non-woven fabrics are folded, the base part of each leakage-proof separation edge is formed by bonding the bottom membrane non-woven fabrics with a surface layer or the bottom membrane after the bottom membrane non-woven fabrics are folded towards the longitudinal central line direction of the absorbing product, and then the bottom membrane non-woven fabrics are continuously upwards extended and then are inwards or outwards folded and bonded to form a telescopic part of each leakage-proof separation edge.