CN210447381U

CN210447381U - Absorbent article

Info

Publication number: CN210447381U
Application number: CN201920712052.XU
Authority: CN
Inventors: 杨立业; 李田雨
Original assignee: Pigeon Industries Changzhou Co Ltd
Current assignee: Pigeon Industries Changzhou Co Ltd
Priority date: 2019-05-17
Filing date: 2019-05-17
Publication date: 2020-05-05
Anticipated expiration: 2029-05-17

Abstract

The utility model discloses an absorptive article, which comprises a permeable surface layer, an absorber and a water-repellent back layer. The water permeable surface layer is in direct contact with the skin. The water permeable surface layer is provided with an upper water permeable surface layer and a lower water permeable surface layer in this order from the near side to the far side, wherein the fibers of the lower water permeable surface layer are arranged to extend substantially in the longitudinal direction of the absorbent article, and the hydrophilicity of the lower water permeable surface layer is greater than the hydrophilicity of the upper water permeable surface layer. Due to the adoption of the structure, liquid impurities such as urine and the like can be ensured to quickly penetrate through the permeable surface layer, and the paper diaper is ensured to have the characteristics of dryness and smoothness.

Description

Absorbent article

Technical Field

The present invention relates to the field of absorbent articles, such as diapers, nappies, incontinence guards or sanitary towels and the like.

Background

Because the admission threshold of the disposable sanitary product industry is not high, more and more new enterprises are emerging continuously, and more disposable sanitary products can be contacted by people. The prior paper diaper is widely applied to the old, patients with special diseases and infants. In particular, diapers for infants and children have become one of the necessary daily necessities in the growth process of the infants.

Diapers are disposable absorbent articles which have been rapidly growing in recent years, and the quality of products from various manufacturers varies. Although most manufacturers continuously pursue thin, breathable and dry products, in order to meet the demand of rapid sales, the product performance often stays on the aspect of good display effect, and how to achieve small performance under the real use condition of the baby is not studied seriously. For the paper diaper, a plurality of different absorption states exist, and the paper diaper absorbs under the condition of no pressure when a baby climbs and walks; when the baby lies down, sits and is held by parents, the paper diaper absorbs the baby under the bearing pressure. At present, more attention is paid to the absorption performance of the paper diaper under the condition of no pressure by developers, and the attention to the absorption performance under the pressure is far from enough. In addition, in order to obtain a soft hand feeling, designers mainly pay attention to the softness of the material when selecting the material, neglect the balance between softness and fluffing, and do not pay attention to whether the material can meet the requirement of softness and ensure smoothness (low friction coefficient) or not. However, these neglected factors are often factors that have a significant impact on the baby. In summary, the following defects are common in the conventional absorbent articles such as paper diapers:

1) although most manufacturers are making diapers as thin as possible, the implementation is not consistent. Some diapers are simply thinned in the production process, and the diapers are compressed as much as possible during packaging, so that the whole thickness of the diapers is prevented from being increased after the diapers become fluffy. However, this method greatly reduces the softness of the diaper product itself, and makes the product stiff. In addition, there are many factories using composite cores in the form of bulky nonwoven fabrics, and the polymer is fixed between fibers of the bulky nonwoven fabrics by hot melt adhesive, and the composite cores of this structure use a large amount of hot melt adhesive, so that the air permeability and water absorbability thereof are remarkably reduced, and the touch feeling of the user is also hardened. For a composite core with a multilayer structure, different layers in the composite core are made of different high polymer materials to improve the overall performance of the composite core. However, this structure also requires a large amount of glue for fixing, and the above-mentioned problems also exist.

2) In order to obtain a diaper having a better absorption performance under an experimental exhibition effect or a non-pressure condition, designers often increase the amount of the polymeric absorbent resin. However, simply increasing the amount of the polymeric absorbent resin results in deterioration of the absorption performance for many times, deterioration of the absorption performance of the diaper under pressure, and simultaneously, the product has a very obvious granular feeling, which affects the use feeling. If too much polymeric absorbent resin is added to the ultra-thin core, the problem that the polymeric resin overflows the product is also easily caused.

3) Designers have considered the soft touch of the surface of absorbent articles such as diapers alone, neglecting its effect on product dryness. And the hand feeling of the non-woven fabric is often worsened by using the drier and more comfortable fabric. When the baby uses the paper diaper absorbent article, the buttocks become flush because of not dry enough after the paper diaper absorbs urine, no matter the surface is not dry enough or the surface touch is not soft and smooth enough; or the surface is not soft and smooth enough, the friction coefficient is large, the friction force between the paper diaper and the skin is increased, and the skin is abraded and reddened.

4) Because fine denier fibre brings the surface to deposit water easily to lead to the phenomenon of the dry and comfortable enough in surface, therefore fine denier fibre can bring the splendid smooth effect, so the surface course often can not use fine denier fibre, so the surface course of present panty-shape diapers product still awaits further improvement.

Therefore, further improvement in the performance and the like of conventional absorbent articles such as disposable diapers is desired.

SUMMERY OF THE UTILITY MODEL

The utility model provides an absorbent article, the permeable surface layer of which has the function of point penetration, namely, the liquid can quickly infiltrate downwards on the upper layer (upper permeable surface layer) of the permeable surface layer without obvious diffusion; however, the liquid can be well diffused in the longitudinal direction of the article (i.e., the longitudinal direction of the absorbent article) in the lower layer of the water-permeable top layer (lower water-permeable top layer). Meanwhile, the opening of the absorber can ensure that liquid can more easily diffuse towards the lower layer of the side, deviating from the skin, of the absorber and diffuse towards the length direction of the absorber when flowing to the opening.

The utility model discloses a solve above-mentioned technical problem through following technical scheme:

the utility model provides an absorbent article, it includes the main part that can contact with the wearer's skin, wherein, the main part is by the near side towards the wearer's skin towards deviating from the distal side of wearer includes in proper order:

a water-permeable surface layer that is in direct contact with the skin and includes an upper water-permeable surface layer and a lower water-permeable surface layer that are distributed in order from the proximal side to the distal side and have sequentially increasing degrees of hydrophilicity, wherein fibers of the lower water-permeable surface layer are configured to extend substantially in a longitudinal direction of the absorbent article;

an absorbent body for absorbing and retaining liquid;

a water-repellent back layer located on the distal side of the absorbent body and configured to be formed of a material that is air-permeable and water-impermeable.

Preferably, the water permeable surface layer is a double-layer net-laying type hot air non-woven fabric.

Preferably, the absorber comprises a water-locking layer, a conducting layer and a coating layer from inside to outside in sequence, wherein the coating layer is in contact with the lower water-permeable surface layer and covers the conducting layer and the water-locking layer, and the absorber is provided with an opening extending along the length direction at the far side.

Preferably, the width D of the opening₁Satisfies the following conditions: d is not less than 5mm₁≤30mm。

Preferably, the water locking layers comprise a first water locking layer, a second water locking layer and a third water locking layer which are distributed from inside to outside and have sequentially increased hydrophilicity.

Preferably, the absorbent article further comprises a sealing layer for closing the opening, the sealing layer comprising an SMS nonwoven fabric.

Preferably, the seal layer is a multi-layer structure with not less than 3 layers, and the basis weight of the SMS non-woven fabric is not less than 20 gsm.

Preferably, the conducting layer, the first water-locking layer, the second water-locking layer and the third water-locking layer are water-locking layers with ES fibers, and the conducting layer, the first water-locking layer, the second water-locking layer and the third water-locking layer are arranged between each other to form a point-adhesion structure by using the ES fibers.

Preferably, the absorbent article further includes a waist patch and a side flap, the front waist patch being provided at a first end of the main body, the side flap being provided at a second end of the main body opposite to the first end, the side flap being engaged with the front waist patch so that the absorbent article is worn.

Preferably, the thickness D of the absorber₂Satisfies the following conditions: d₂≤3mm。

Preferably, the second end is provided with a first elastic zone, a second elastic zone and a third elastic zone respectively extending in the transverse direction and distributed in sequence from the crotch region towards the edge region in the length direction of the absorbent article, the first elastic zone, the second elastic zone and the third elastic zone being configured to have different elasticities to fit different positions of the waist of the wearer.

Preferably, the skin-friendly fiber is any one or more of cotton fiber, aloe fiber, fibroin fiber and milk protein fiber.

The utility model has the advantages that: the thickness of the article is obviously reduced, the air permeability of the article is improved, the friction coefficient of the absorbent article such as a paper diaper can be reduced, and the absorbent article is ensured to have higher softness. Furthermore, according to the utility model discloses an absorbent article, the surface remains dry and comfortable, smooth throughout in the use of wearer, when using as panty-shape diapers, can effectively avoid the baby to appear the red butt condition.

Drawings

Fig. 1 is a schematic perspective view of a developed diaper according to a preferred embodiment of the present invention.

Fig. 2 is a sectional view of the diaper folded along line a-a of fig. 1.

Fig. 3 is a schematic view of a water permeable facing using the double layer lapping structure of the first embodiment.

Fig. 4 is a schematic view of a water permeable facing using a second embodiment of a double layer lapping structure.

Fig. 5 is a schematic structural view of an absorber according to a preferred embodiment of the present invention.

Fig. 6 is an enlarged view of the absorbent body of fig. 2.

Fig. 7 is a schematic structural view of an SMS nonwoven fabric according to a preferred embodiment of the present invention.

Fig. 8 is a graph comparing the saturated absorption capacity and the centrifugal water lock capacity of the absorber according to a preferred embodiment of the present invention with those of the conventional absorber.

Fig. 9 is a graph comparing data of the amount of rewet of a diaper using the absorber of the present invention and a diaper using a conventional absorber under normal pressure conditions.

Fig. 10 is a data comparison graph of the rewet amount of a diaper using the absorber of the present invention and a diaper using a conventional absorber under pressurized conditions.

Fig. 11 is a data comparison graph showing the utilization rate of the absorber of the diaper using the absorber of the present invention and the diaper using the conventional absorber.

Fig. 12 is a data comparison graph of the surface wetting length of the permeable surface layer and the conventional surface layer of the present invention.

Fig. 13 is a data comparison graph of the rewet volume of diapers according to various embodiments of the present invention, measured using the GB/T28004 rewet volume test method.

Fig. 14 is a data comparison graph of absorber utilization of diapers according to various embodiments of the present invention.

Fig. 15 is a graph comparing the moisture permeability data of the water repellent back layer according to the present invention with that of a conventional water repellent back layer.

The reference numerals are explained below:

1: a water permeable facing; 2: a water repellent backing layer; 3: protecting the enclosure;

4: a side wing; 5: an absorbent body; 6: gluing;

7: front waist patch; 8: a leg elastic body; 9: a containment elastomer;

10: an elastic waist band; 11: a urine wetness display belt; 12: a permeable surface layer is arranged;

13: a lower water permeable facing; 14: chemical fibers; 15: cellulose fibers;

51A: a first water-locking layer; 51B: a second locked water layer; 51C: a third locked water layer;

52: a conductive layer; 53: a coating layer; 54: an opening;

55: a sealing layer; 100: main body

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided in conjunction with the accompanying drawings, and the following description is exemplary and not intended to limit the present invention, and any other similar situations may fall within the scope of the present invention.

The utility model discloses in, the fibre of term "close skin nature fibre" for not having the injury to skin, close skin nature fibre has soft, smooth characteristic, and wet effect is good is led in the moisture absorption of this kind of fibre, and close skin nature is good. The term "proximal" refers to the side closer to the wearer's skin and "distal" refers to the side farther from the wearer's skin. In the following description, directional terms such as "upper", "lower", "left", "right", etc. are used for illustration only, and components of the present invention may be positioned in a variety of different orientations, and the directional terms are used for exemplary purposes and are not intended to be limiting. "longitudinal" means the longitudinal direction of the diaper, and "transverse" means the width direction of the diaper, and the "longitudinal" is in a perpendicular relationship.

The degree of hydrophilicity is an indication of the ability of a material to absorb water. The hydrophilicity can be characterized by a general contact angle in the field, and the smaller the contact angle is, the higher the hydrophilicity is, and the stronger the absorption capacity of the material is; the larger the contact angle, the lower the hydrophilicity and the weaker the absorption capacity of the material.

For convenience of explanation, the material and structure of the absorbent article will be described only by way of example with reference to a diaper, and it is understood that other types of absorbent articles such as diapers, incontinence protectors, sanitary napkins and the like may be used with the same material and structure as the diaper, except that the structure for ensuring that the absorbent article can be worn is slightly different from the structure of the diaper.

As shown in fig. 1-2, wherein fig. 1 is a schematic perspective view of a developed diaper according to a preferred embodiment of the present invention; fig. 2 is a cross-sectional view of the diaper folded along the line a-a in fig. 1, wherein the containment flaps 3 shown in fig. 2 are intended to be in a vertical position in the situation of use. The diaper of the present invention has a main body 100 that can be in contact with the skin of the wearer. The main body 100 comprises a water permeable surface layer 1, an absorption body 5 and a water repellent back layer 2 in this order from a proximal side facing the skin of the wearer to a distal side facing away from the skin of the wearer. The water permeable facing layer 1 is the portion that is in direct contact with the skin. Wherein, the permeable surface layer 1 is sequentially provided with an upper permeable surface layer 12 and a lower permeable surface layer 13 from top to bottom, which is a double-layer net-laying type hot air non-woven fabric. The fibers of the lower water-permeable surface layer 12 extend substantially in the longitudinal direction of the absorbent article, and the hydrophilicity of the lower water-permeable surface layer 13 is greater than the hydrophilicity of the upper water-permeable surface layer 12. The water-repellent backing layer 2 is located on the far side of the absorbent body 5 and is made of a material that is air-permeable and water-impermeable. The water repellent back layer 2 can effectively prevent liquid from overflowing from the thickness direction of the paper diaper through the water locking layer.

After the fiber direction of the lower permeable surface layer 13 with hydrophilicity superior to that of the upper permeable surface layer 12 is set as above, the surface of the permeable surface layer 1 is in a longitudinal stripe shape. The construction mode of the water permeable surface layer 1 can ensure that the diffusion speed of liquid foreign matters such as urine and the like in the thickness direction of the water permeable surface layer 12 is far greater than the diffusion speed of liquid in the longitudinal and transverse directions of the water permeable surface layer 12; and after the liquid rapidly enters the lower water-permeable surface layer 13 through the upper water-permeable surface layer 12, the liquid can be rapidly diffused along the longitudinal direction of the lower water-permeable surface layer 13. Therefore, the amount of liquid foreign matters existing on the permeable surface layer 1 contacting with the skin of the wearer on the paper diaper is small, and the wearer can keep a dry feeling in the using process. Under the condition of being used as a baby diaper, the diaper can effectively avoid the condition of red buttocks.

The water permeable surface layer 1 can be made of skin-friendly fibers, non-skin-friendly fibers and the like. Wherein, the non-skin-friendly fine Denier fiber is a fiber with the fineness of 1.0D-1.8D (D: Denier), the skin-friendly fiber accounts for 1-50% of the weight of the water permeable surface layer 1, and the non-skin-friendly fine Denier fiber accounts for 5-99% of the weight of the water permeable surface layer 1. The water-permeable surface layer 1 made of the above material composition has a low degree of hydrophilicity, and urine and the like do not stay in the water-permeable surface layer 1 in a large amount.

The absorbent body 5 is a composite core for absorbing and retaining liquid, and its thickness is preferably set to not more than 3 mm. The absorber is prepared from fluff pulp, high-molecular water-absorbent resin particles and ES fibers, and does not contain hot melt adhesive inside. Referring to fig. 5 to 6, the absorbent body 5 comprises a water-locking layer, a conductive layer 52 and a coating layer 53 in sequence from inside to outside, wherein the coating layer 53 contacts with the lower water-permeable surface layer 13 and coats the conductive layer 52 and the water-locking layer. The coating 53 preferably has a hydrophilicity superior to that of the lower water permeable surface layer 13, i.e. the coating 53 has a contact angle smaller than that of the lower water permeable surface layer 1. Referring to fig. 6, the absorbent body 5 is distally provided with a longitudinally extending opening 54, whereby the absorbent body 5 is formed as a semi-closed body. The provision of the opening 54 allows the distal side (lower portion) of the absorbent body 5 to have a small back pressure, and liquid can be easily diffused to the absorbent body 5; after the liquid is diffused to the opening 54, because the far-side water-repellent back layer 2 is the impermeable material layer, even if the liquid sequentially passes through the absorber 5 from top to bottom in a multi-point discrete mode, the liquid is blocked by the water-repellent back layer 2 at the position of the opening 54 and is absorbed by the conducting layers 52, the water-locking layers and the coating layers 53 at the left side and the right side of the opening 54, so that the liquid can be further uniformly diffused to all positions of the composite core body in the whole longitudinal direction, the situation that the liquid is concentrated locally and the liquid at other positions has less moisture is avoided, and the absorption capacity of the diaper is further obviously improved.

Preferably, the width D of the opening 54 of the clad 53 may be set to 5mm to 30 mm. In addition, referring to fig. 2 and 6 in combination with fig. 7, a sealing layer 55 for sealing the opening 54 may be disposed at the opening 54 of the covering layer 53. The opening 54 is sealed by the sealing layer 55, so that the width of the opening 54 of the cover layer 53 is not increased to deform the absorbent member 5 during use of the diaper, and the diaper is deformed to affect the comfort of the wearer.

Referring to fig. 7, the SMS nonwoven fabric at the sealing layer 55 is composed of an S layer, an M layer, and an S layer, which are sequentially disposed from top to bottom. Wherein, the S layers of the M upper and lower layers can be respectively arranged into a plurality of layers. The sealing layer 55 made of SMS nonwoven fabric or the like may form a double water-locking functional layer in the thickness direction of the diaper together with the water-repellent back layer 2. The SMS nonwoven of the seal layer 55 is preferably arranged to a basis weight in the interval 8-13 gsm. More preferably, the basis weight is set to 10gsm and the M layer in the SMS nonwoven is set to 6 gsm.

Referring to fig. 5-6, according to a preferred embodiment, the water-locking layer of the present invention comprises a first water-locking layer 51A, a second water-locking layer 51B and a third water-locking layer 51C, which are sequentially distributed from inside to outside. The water-locking layer is made of fluff pulp, high-molecular water-absorbing resin particles and the like. The proportions of the water-absorbent polymer particles in the first, second and third water-locking

layers

51A, 51B and 51C are gradually increased. The three water-locking

layers

51A, 51B and 51C have a decreasing degree of hydrophilicity in order from the direction close to the coating layer 53 to the direction away from the coating layer 53, so that the liquid is more likely to diffuse from the water-permeable surface layer toward the inside of the water-locking layer, ensuring dryness of the surface layer.

Preferably, the polymeric water-absorbent resin particles of the first water-locking layer 51A account for 40% to 60% of the total weight in the first water-locking layer 51A; the high-molecular water-absorbent resin particles of the second water-locking layer 51B account for 50-70% of the total weight of the second water-locking layer 51B; the high molecular water-absorbent resin particles of the third water-locking layer 51C account for 60 to 80 percent of the total weight of the third water-locking layer 51C. The polymeric water-absorbent resin particles in the 3-layer water-

locking layer

51A, 51B, 51C should ensure that the absorption capacity of the physiological saline is not less than 60g/g (indicating that 60g of physiological saline can be absorbed per gram of substance), the centrifugal water retention capacity is not less than 38g/g (indicating that 38g of physiological saline can be locked per gram of substance under the centrifugal dehydration condition), and the absorption capacity under the load of 1.9kpa is not less than 30g/g (indicating that 30g of physiological saline can be absorbed per gram of substance).

The first, second, and third water-locking

layers

51A, 51B, and 51C contain ES fibers, and therefore, the three water-locking

layers

51A, 51B, and 51C can be fixed to each other by multi-point adhesion by thermal fusion of the ES fibers to form a point adhesion structure. Compared with the structure that the layers are adhered to each other by hot melt adhesive in the prior art, the ES fiber hot melt allows the layers to form a point adhesion structure by adhering to each other in a plurality of pairs of point-shaped areas opposite to each other, the layers cannot be separated by the hot melt adhesive layer with weak air permeability and water permeability and high hardness, and the air permeability, the water permeability and the softness of the water locking layer are remarkably improved.

Referring to fig. 1-2, as a diaper, in the diaper of the preferred embodiment, the structure for ensuring that it can be worn is: one end of the main body 100 is provided with a front waist tape 7, and the other end is provided with a side flap 4, and the side flap 4 is matched with the front waist tape 7 so that the diaper can be worn. The wings 4 have a different color from the body 100, which may be selected from blue, green, yellow, etc. The side flap 4 is preferably a spunbonded nonwoven, the colour of which is formed by the addition of a colour master. The side wings 4 are set in a color different from that of the main body 100, so that the main body has higher identification degree, thereby being convenient for people to identify the front part and the rear part of the diaper, and avoiding the front and rear parts of a wearer from being inverted in the using process.

An elastic waist band 10 is further provided at substantially the same position as the side flaps 4 in the longitudinal direction a-a, and when the side flaps 4 are fitted to the front waist patch 9, the elastic waist band 10 provides a certain elasticity to ensure a strong sense of restraint to the waist of a wearer such as an infant. Referring to fig. 1, according to a preferred embodiment, the elastic waist 10 includes first, second and third elastic zones extending in the transverse direction and sequentially distributed in the longitudinal direction from the crotch region toward the edge regions, respectively. The first, second and third elastic regions have different elasticities so that the waist elastic 10 formed by the elastic regions can be fitted to different positions of the waist of the wearer. Elastic waistline 10 that a plurality of elastic zones are constituteed makes according to with preceding waist subsides 7, flank 4 cooperation in coordination the utility model discloses a panty-shape diapers are more adapted with the wearer's size.

In the example of fig. 1, the first elastic zone is constituted by 2 elastic strands positioned to the left of the elastic waist circumference 10 of fig. 1; the second elastic area is composed of 3 elastic strips at the middle position of the elastic waistline 10; the third elastic zone is formed by 2 elastic strips positioned at the right side of the elastic waist 10. It is understood that the number of elastic strips in each elastic zone may be appropriately changed in order to ensure that the diaper can fit the waist of wearers having different body types according to the inventive concept of the present application.

Preferably, the ratio of the length of the first, second and third elastic zones in the natural state to the length in the maximum stretched state is set to 2, 1.8, 2.2, respectively. The stretchable length of the different elastic zones may be achieved by providing elastic strips having different elasticity and/or length.

Referring to fig. 1-2, in the present invention, the outer edge positions of the left and right sides along the length direction a-a of the diaper main body 100 are further provided with the enclosure 3 along the central symmetry, and the enclosure 3 is provided with the enclosure elastic body 9, such as an elastic band, along the length direction a-a thereof. By means of the cuff elastic body 9 and the cuff 3, the diaper can be better held at the crotch of an infant, the diaper is prevented from being displaced, and urine or the like is prevented from being ejected or oozed out from the side portion of the diaper.

Preferably, a urine wetness indicator 12 is further provided on the main body 100. With the use of the urine wetness indicator tape 12, one can easily identify the content of foreign matter such as urine on the diaper to determine whether it needs to be replaced.

In order to further ensure that foreign matter such as urine overflows or is ejected from the side portion of the diaper, a leg elastic body 8 is further provided along the outer edge side in the longitudinal direction a-a of the main body 100. The leg elastic bodies 8 are located closer to the side end portions of the main body 100 than the apron elastic bodies 9. Under the condition that the double elastic bodies are arranged, the tensioning degree of the apron elastic bodies 9 and the leg elastic bodies 8 can be properly reduced under the condition that the foreign matters such as urine and the like do not overflow from the side parts, so that the elastic bodies can be prevented from causing tight constraint feeling to the infant.

For the coating layer 53 of the present invention, it is preferably a hot air non-woven fabric with a basis weight not less than 20gsm and prepared by using multiple hydrophilic fibers, wherein the multiple hydrophilic fibers represent fibers that the hydrophilic finish on the surface of the fiber will not lose hydrophilicity after being washed by liquid for multiple times. As another preferred embodiment, the coating layer 53 may also be a spunlace nonwoven fabric with a basis weight of not less than 30gsm and made of viscose and hydrophilic polyester, wherein the hydrophilic polyester accounts for 60-80% of the weight of the coating layer 53.

For the conductive layer 52 of the absorbent body 5, it is preferable to use fluff pulp, ES fiber, or the like. The conductive layer 52 is preferably arranged to constitute 3-10% of the weight of the absorbent body 5. After the conductive layer 52 is provided to include the ES fibers, a point-bonding structure may also be formed between the conductive layer 52 and the third water-locking layer 51C, and thus, the air permeability and water permeability of the diaper may be further improved.

According to the above, the hydrophilicity of the upper water-permeable surface layer 12, the lower water-permeable surface layer 13, the coating layer 53 and the water-locking layer increases in order, the hydrophilicity of the upper water-permeable surface layer 12 and the lower water-permeable surface layer 13 is low, and the hydrophilicity of the coating layer 53 and the water-locking layer is high. According to current conventional surface course, liquid impurity such as urine can be fast along the surface diffusion of last surface course 12 that permeates water after contacting last surface course 12 that permeates water, later again towards the absorption core infiltration step by step, therefore the wet condition appears easily in the surface course. And according to the panty-shape diapers that set up above, lower floor's material has the hydrophilic performance who is superior to upper strata material, can permeate at less area fast surface course 13 that permeates water down after liquid impurity such as urine contacts face layer 12 that permeates water (also liquid impurity passes through face layer 1 that permeates water with the mode of "point infiltration") to permeate towards farther side direction (towards 5 directions of absorbent) next to, liquid impurity only exists on the few part of face layer 1 that permeates water on a minute amount, consequently, according to the utility model discloses a face layer 1 that permeates water possesses dry and comfortable, smooth characteristics.

Compared with the conventional paper diaper with the main body containing no fluff pulp and containing the hot melt adhesive, the paper diaper has the main body containing the fluff pulp and the absorber containing no hot melt adhesive, so that the absorption performance, the water locking performance, the air permeability, the softness and the like of the paper diaper are obviously improved. Referring to fig. 8-12, various performance parameters of a conventional diaper and a diaper according to example 1 of the present application are shown. In the water permeable surface layer of the diaper of the present application corresponding to fig. 8-12, the upper water permeable surface layer 12 includes 1.5D fine denier fiber with a basis weight of 9.3gsm and skin-friendly fiber with a basis weight of 0.7gsm, and the lower water permeable surface layer includes 2.0D non-skin-friendly common fiber with a basis weight of 12 gsm; the cover layer 53 is a multi-hydrophilic hot-air nonwoven fabric having a basis weight of 20 gsm; the seal layer 55 was an SMS nonwoven fabric with a basis weight of 12 gsm; the first, second and third water-lock layers each comprised fluff pulp with a basis weight of 9gsm, ES fibers with a basis weight of 6gsm, and superabsorbent resin particles (SAP) with a basis weight of 55 gsm; the conductive layer comprised fluff pulp with a basis weight of 9gsm and ES fibers with a basis weight of 6 gsm; the thickness of the paper diaper is 2.96 mm. Referring to fig. 8, compared with the conventional paper diaper, the water locking capacity of the paper diaper of the present invention can be improved by about 26%, referring to fig. 9 and 10, the normal pressure and pressurization infiltration amount of the paper diaper of the present invention can be significantly reduced; referring to fig. 11, the utilization rate of the absorber of the diaper according to the present invention can be significantly improved, wherein the utilization rate of the absorber represents the ratio of the length of the absorber absorbing liquid to the length of the whole absorber after 3 times of absorption by the diaper; referring to fig. 12, compared to the conventional surface layer, the surface wetting length of the water permeable surface layer 1 of the present invention can be reduced by about 39%. Meanwhile, according to the absorbent composed of the cover layer 53, the conductive layer 52, and the water-lock layer in the above form, since it does not use bulky nonwoven fabric any more, the entire thickness of the diaper can be reduced from 3.52mm to 2.96 mm.

Referring to FIG. 13, there is shown rewet performance of diapers having different covers as measured using the GB/T28004 rewet test; figure 14 shows the absorber utilization of the corresponding diapers of different covers. Wherein, the opening width D of the diaper in example 1 is 25mm, and materials of each layer of the diaper can be referred to the description of the diaper corresponding to fig. 8-12, and are not repeated herein; the diapers of examples 2 to 4 were made of materials and/or opening widths different from those of the cover 53 of example 1. The opening width D and the composition of the coating layer 53 of examples 1 to 4 are shown in the following table:

as can be seen from fig. 13, the diaper having a smaller opening width D has a larger rewet amount; a cover layer 53 made of a hot air non-woven fabric having a large basis weight and having a large rewet amount corresponding to the diaper; the rewet amount of the coating layer 53 formed of the spunlace nonwoven fabric is significantly larger than that of the multi-time hydrophilic nonwoven fabric. According to fig. 14, in the diaper using the coating layer of the hydrophilic hot-air non-woven fabric for a plurality of times, the smaller the opening width and the smaller the basis weight, the lower the utilization rate of the absorber of the diaper, but the higher the utilization rate of the absorber (73% or more) can be maintained; the absorbent utilization of the diaper with a cover of spunlace nonwoven fabric (example 4) was significantly lower than the diaper with a cover of multi-pass hydrophilic hot-air nonwoven fabric.

For the water-repellent back layer 2 of the present invention, it can be made of a PE film, a common water-repellent nonwoven fabric, or the like. Wherein, the air permeability of the PE film is 5000-6000g/m²In the interval of 24h, the common water-repellent non-woven fabric is a hot-air non-woven fabric with the basis weight of not less than 20gsm or an SS non-woven fabric with the basis weight of not less than 15 gsm.

The water-repellent back layer 2 can also be made of medical waterproof non-woven fabrics and common water-repellent non-woven fabrics. Wherein the medical waterproof nonwoven fabric is an SMS nonwoven fabric having 3M layers as shown in FIG. 3, or an SMS nonwoven fabric having not less than 3M layers. The basis weight of the medical water-repellent nonwoven fabric is preferably not less than 20 gsm.

Fig. 15 shows performance parameters of a conventional water repellent back layer and a water repellent back layer according to the present application, wherein the moisture permeability in fig. 15 indicates the amount of moisture that permeates the water repellent back layer in a gaseous form. The water repellent back layer 1 in fig. 15 is a water repellent back layer comprising a PE film and a general water repellent nonwoven fabric; the water-repellent back layer 2 is a water-repellent back layer containing medical waterproof non-woven fabric and common water-repellent non-woven fabric. As can be seen from fig. 15, the water repellent back layer of the present application has a good air permeability, so that liquid foreign matters such as urine on the diaper can be more and more quickly discharged after evaporation, and the use feeling of the diaper is improved.

According to a preferred embodiment of the present invention, besides the skin-friendly fibers and the non-skin-friendly fibers, the water permeable surface layer 1 may be further provided with non-skin-friendly common fibers. Wherein the non-skin-friendly ordinary fibers are fibers with the fineness of 2.0D-3.0D. The non-skin-friendly fine denier fiber accounts for 5-49% of the weight of the water permeable surface layer 1, the non-skin-friendly common fiber accounts for 45-94% of the weight of the water permeable surface layer 1, and the non-skin-friendly common fiber is positioned on the lower water permeable surface layer 13 at the far side of the water permeable surface layer 1. The permeable surface layer 1 may be a double-layered lapping structure in the case of being provided with skin-friendly fibers, non-skin-friendly fine denier fibers, and non-skin-friendly general fibers. The skin-friendly fibres may preferably be provided as chemical fibres 14 or as cellulose fibres 15.

When the skin-friendly fibers are chemical fibers 14, as shown in fig. 3, the upper permeable layer 12 of the permeable facing 1 may be configured to include non-skin-friendly fine fibers and chemical fibers 14, and the lower permeable layer 13 of the permeable facing 1 may be configured to include non-skin-friendly ordinary fibers. In this case, it is preferable that the fiber component of the upper permeable layer 12 of the permeable top layer 1 is made of two types of fibers, i.e., non-skin-friendly fine denier fiber and chemical fiber 14, and the fiber component of the lower permeable layer 13 of the permeable top layer 1 is made of only non-skin-friendly general fiber, so that the manufacturing process is simplified while ensuring softness, dryness and smoothness.

When the skin-friendly fibers are cellulose fibers 15, as shown in fig. 4, the upper water permeable facing 12 of the water permeable facing 1 may be configured to include non-skin-friendly fine denier fibers, and the lower water permeable facing 13 of the water permeable facing 1 may be configured to include cellulose fibers 15 and non-skin-friendly ordinary fibers. In this case, it is preferable that the fiber component of the upper water-permeable surface layer 12 of the water-permeable surface layer 1 is made of only the non-skin-friendly fine denier fiber, and the fiber component of the lower water-permeable surface layer 13 of the water-permeable surface layer 1 is made of both the cellulose fiber 15 and the non-skin-friendly normal fiber, so that the manufacturing process can be simplified while ensuring softness, dryness and smoothness.

The skin-friendly component can be uniformly and firmly bonded to the skin-friendly fiber by selecting an appropriate manner according to the type of the skin-friendly fiber. Specifically, when the skin-friendly fiber is the cellulose fiber 15, the skin-friendly ingredient is added on the cellulose fiber 15 in the form of microcapsules; when the skin-friendly fiber is the chemical fiber 14, the skin-friendly ingredient is added to the chemical fiber 14 in the form of a microcapsule or a mixture in a hydrophilic oil agent.

According to a preferred embodiment of the present invention, the skin-friendly fibers are any one or more of cotton fibers, aloe fibers, fibroin fibers, and milk protein fibers. The fibers such as cotton fiber, aloe fiber, fibroin fiber, milk protein fiber and the like are all natural plant fibers, the skin-friendly fiber can avoid the allergy phenomenon when the skin-friendly fiber is used by infants and the like, and the skin-friendly fiber has better skin-friendly performance.

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

Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. An absorbent article comprising a main body contactable with the skin of a wearer, characterized in that the main body comprises, in order from a proximal side facing the skin of the wearer to a distal side:

an absorbent body for absorbing and retaining liquid;

2. The absorbent article of claim 1, wherein the water permeable facing layer is a double-layer, web-laid, through-air nonwoven.

3. The absorbent article according to claim 1, wherein the absorbent body comprises a water-locking layer, a conductive layer and a covering layer in this order from inside to outside, wherein the covering layer is in contact with the lower water-permeable surface layer and covers the conductive layer and the water-locking layer, and the absorbent body is provided with an opening extending in the longitudinal direction at the distal side.

4. The absorbent article of claim 3, the width D1 of the opening satisfies: d1 is more than or equal to 5mm and less than or equal to 30 mm.

5. The absorbent article of claim 3 or 4, wherein the water-locking layer comprises a first water-locking layer, a second water-locking layer and a third water-locking layer which are distributed from inside to outside and have sequentially increased hydrophilicity.

6. The absorbent article of claim 3 or 4, further comprising a sealing layer for closing the opening, the sealing layer comprising an SMS nonwoven.

7. The absorbent article of claim 6, wherein the seal layer is a multi-layer structure of not less than 3 layers, and the SMS nonwoven fabric has a basis weight of not less than 20 gsm.

8. The absorbent article of claim 5, wherein the conductive layer, the first water-locking layer, the second water-locking layer, and the third water-locking layer are water-locking layers having ES fibers, and the conductive layer, the first water-locking layer, the second water-locking layer, and the third water-locking layer are configured to be formed into a point-stick structure with the ES fibers therebetween.

9. The absorbent article of claim 1, further comprising a waist panel and side flaps, wherein a first end of the main body is provided with a front waist panel and a second end of the main body opposite the first end is provided with the side flaps, and wherein the side flaps cooperate with the front waist panel to allow the absorbent article to be worn.

10. The absorbent article of claim 1, wherein the absorbent has a thickness D₂Satisfies the following conditions: d₂≤3mm。

11. The absorbent article of claim 9 wherein the second end is provided with first, second and third elastic zones extending respectively in the transverse direction and distributed sequentially from the crotch region toward the edge region along the length of the absorbent article, the first, second and third elastic zones being configured to have different elasticities to fit different locations of the waist of the wearer.