CN113633471A

CN113633471A - Absorbent article and method of making same

Info

Publication number: CN113633471A
Application number: CN202110942831.0A
Authority: CN
Inventors: 荣育凤; 焦红岩; 田春兰; 崔象凯
Original assignee: Nuo Chen Co ltd
Current assignee: Nuo Chen Co ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2021-11-12

Abstract

The invention relates to the technical field of sanitary products, and provides an absorbent product and a manufacturing method thereof. The absorbent article comprises a surface layer, a first absorption layer, a second absorption layer and a bottom layer from top to bottom in sequence; the first absorption layer is made of at least one perforated foam material layer, the perforated foam material layer comprises a first surface and a second surface which are oppositely arranged, the first surface is closer to the surface layer than the second surface, a plurality of through holes are arranged on the first surface, the through holes extend from the first surface to the second surface, and the through holes are obliquely arranged relative to the central axis of the first surface in the length direction; the second absorbent layer is made of at least one layer of super absorbent resin absorbent paper. The absorbent article of the invention has the advantages of fast liquid infiltration speed, instant absorption, instant drying, health, softness, air permeability, good dryness and the like.

Description

Absorbent article and method of making same

Technical Field

The invention relates to the technical field of sanitary products, in particular to an absorbent product and a manufacturing method thereof.

Background

At present, with the development of the times, the use concept of sanitary absorbent articles by consumers is continuously changed, so that the sanitary absorbent articles are required to meet the basic functions of comfort in use and good absorbability, and also required to have the performances of instant absorption, instant drying, health, softness, air permeability and the like, so that various large sanitary absorbent article enterprises improve the sanitary absorbent articles through various researches so as to meet the requirements of the existing markets.

Taking a sanitary towel as an example, the existing sanitary towel is roughly divided into a surface layer, a liquid diversion material, an absorber wrapping material, an absorber and a breathable liquid-tight bottom layer material, and other structures such as a functional core, a cover cloth and the like can be added according to specific requirements. In the prior art, generally, in order to improve the liquid infiltration speed of disposable sanitary absorbent articles and the dryness of the surface of an absorbent body after liquid absorption, a thicker diversion layer with a complex structure is used as a part of an upper liquid permeable layer, absorbent polymer particles with poor blood absorption effect are adopted, and the dosage of the absorbent polymer particles is increased. However, these methods are not good for improving the liquid infiltration speed and the dryness of the sanitary absorbent articles, and the existing sanitary absorbent articles have the problems of slow liquid infiltration speed, slow absorption and poor dryness.

Therefore, in view of the above disadvantages, there is a need to provide a sanitary absorbent article having a high liquid-permeability, high absorbency, and good dryness.

Disclosure of Invention

In view of the above-mentioned problems, the present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides an absorbent article and a manufacturing method thereof, which have the characteristics of high liquid infiltration speed, high absorption performance, good dryness, ventilation and the like, and improve the comfort of users.

In order to solve the technical problems, the invention is realized by the following technical scheme:

according to one aspect of the invention, an absorbent article is provided, which comprises a surface layer, a first absorption layer, a second absorption layer and a bottom layer from top to bottom in sequence;

first absorbed layer is made by the foam material layer that at least one deck was punched, the foam material layer that punches includes relative first surface and the second surface that sets up, first surface is compared the second surface is closer to the top layer, be equipped with a plurality of through-holes on the first surface, the through-hole is followed first surface extends to the second surface, the through-hole for the length direction axis of first surface is the slope setting.

The second absorbent layer is made of at least one layer of super absorbent resin absorbent paper.

In some of these embodiments, the hole pattern of the through-holes comprises at least one of an oval, semi-circular, square, trapezoidal, triangular, bar, wave, heart, or star shape; and/or

The through holes are arranged along the length direction of the first surface to form a row of through holes, and at least two rows of the through holes are arranged on the first surface.

In some embodiments, the hole pattern of the through holes is oval, and two corresponding through holes in two rows of the through holes are distributed in a splayed shape;

the length of the short axis of each through hole is more than or equal to 0.1mm, the length of the long axis of each through hole is more than or equal to 0.3mm, and the distance between every two adjacent through holes in each row of through holes is more than or equal to 0.3 cm; and/or

The inclination angle of the through hole relative to the central axis of the first surface in the length direction is a, and a satisfies: a is more than or equal to 30 degrees and less than or equal to 80 degrees, or a is more than or equal to 100 degrees and less than or equal to 150 degrees.

In some embodiments, the through hole comprises a tapered hole section with gradually decreasing inner diameter in the direction from the first surface to the second surface, and preferably, the through hole further comprises a through hole section with constant inner diameter, the through hole section is communicated with the tapered hole section, and the through hole section is closer to the second surface than the tapered hole section; and/or

The gram weight of the perforated foam material layer is more than or equal to 30g/cm³。

In some embodiments, the super absorbent resin absorbent paper layer is a wet-process super absorbent resin absorbent paper layer formed by uniformly distributing super absorbent resin between two raw paper layers made of wood pulp through a wet papermaking process, and the wet-process super absorbent resin absorbent paper layer includes two raw paper layers and a super absorbent resin layer sandwiched between the two raw paper layers.

In some embodiments, the grammage of the wet-process-made super absorbent resin absorbent paper layer is 20-300 g/m²(ii) a And/or

The gram weight of the super absorbent resin is 10-300 g/m²The particle size is 30-100 meshes, the water retention capacity is not lower than 25g/g, and the liquid passing capacity is not lower than 0.1 mL/min.

In some embodiments, the surface layer is made of a hot-air non-woven fabric, a spun-bonded non-woven fabric or a pure cotton non-woven fabric, preferably, the hot-air non-woven fabric is a fine-denier hot-air non-woven fabric, and the denier of the fine-denier hot-air non-woven fabric is 0.5-2.5 denier; and/or

The bottom layer has degradability and air permeability, and the bottom layer is made of degradable air-permeable materials.

In some of these embodiments, the absorbent article further comprises side leakage prevention layers positioned on both sides in the width direction of the second absorbent layer;

the side leakage prevention layer is made of water-repellent non-woven fabric; and/or

The side leakage prevention layer and part of the lower surface of the second absorption layer are bonded together to form an overlapping area, and the width of the overlapping area is more than or equal to 5 mm.

In some of these embodiments, the absorbent article is an hourglass-shaped absorbent article;

the surface layer in the hourglass-shaped absorbent article is covered on the upper part of the first absorbent layer and extends along the bottom surface of the second absorbent layer from two sides of the second absorbent layer;

the surface layer forms a semi-enclosed structure to the bottom surface of the second absorption layer.

In some embodiments thereof, the absorbent article comprises at least one of a diaper, a pull-up pant, a sanitary napkin, a pantiliner, or a menstrual pant.

In some embodiments, the absorbent article is a sanitary napkin or a menstrual pant.

According to another aspect of the present invention there is provided a method of manufacturing an absorbent article as hereinbefore described, comprising the steps of:

punching the foam material layer to form a punched foam material layer, and compounding the punched foam material layer serving as a first absorption layer and a second absorption layer;

and compounding the surface layer above the first absorption layer and compounding the bottom layer below the second absorption layer to obtain the absorbent article.

The implementation of the invention has the following beneficial effects:

(1) the absorbent article comprises a surface layer, a first absorption layer, a second absorption layer and a bottom layer from top to bottom in sequence, wherein the first absorption layer is made of at least one perforated foam material layer, the perforated foam material layer comprises a first surface and a second surface which are oppositely arranged, a plurality of through holes are formed in the first surface, the through holes extend from the first surface to the second surface, and the through holes are obliquely arranged relative to a central axis of the first surface in the length direction; therefore, the perforated foam material layer with the structure can be used as the first absorption layer to quickly infiltrate, and the infiltration speed of liquid is improved more effectively. And the second absorption layer is made of at least one layer of super absorbent resin absorbent paper layer, so that liquid (such as menstrual blood or urine and other liquid) which is not absorbed by the first absorption layer can be quickly absorbed, the quick absorption, instant absorption and instant drying of the liquid can be accelerated, the dryness of the product can be ensured, the reverse osmosis is effectively reduced, and the use comfort is good.

(2) In some preferred embodiments of the absorbent articles of the present invention, the absorbent article is an hourglass-shaped absorbent article, and the absorbent article with the hourglass-shaped structure can increase the absorption area and increase the absorption capacity, so that the absorption capacity of the absorbent article is further improved, and the absorbent article has a large absorption capacity, a high absorption speed and better dryness.

(3) In some preferred embodiments of the absorbent article of the present invention, the absorbent article further comprises side leakage prevention layers disposed on both sides of the second absorbent layer in the width direction, wherein the side leakage prevention layers can effectively prevent the side leakage of liquid and reduce or prevent the growth of bacteria.

(4) The absorbent articles in some preferred embodiments of the present invention have the characteristics of fast liquid infiltration, instant absorption (fast absorption of liquid such as menstrual blood or urine), instant dryness and good dryness, and also have the properties of coolness, degradability, bacteriostasis, odor removal, high absorbability, health, softness, air permeability and the like.

Drawings

The drawings of the present invention are provided for illustrative purposes only, and the scale of the parts in the drawings is not necessarily consistent with the actual product.

FIG. 1 is a schematic structural view of an absorbent article according to some embodiments of the present invention;

FIG. 2 is a schematic representation of the construction of a first absorbent layer in an absorbent article according to some embodiments of the present invention;

FIG. 3 is a schematic view of the construction of a first absorbent layer in an absorbent article according to further embodiments of the present invention;

FIG. 4 is a schematic representation of the structure of through-holes in a first absorbent layer in an absorbent article according to some embodiments of the present invention;

FIG. 5 is a schematic cross-sectional structure of an absorbent article according to some embodiments of the present invention.

In the figure: 1: a surface layer; 2: a first absorbent layer; 201: a first surface; 202; a second surface; 211: a through hole; 212-a tapered bore section; 213: a straight-through hole section; 3: a second absorbent layer; 4: a bottom layer; 5: and a lateral leakage prevention layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For numerical ranges, one or more new numerical ranges may be obtained by combining the individual values, or by combining the individual values.

It should be noted that the term "and/or"/"used herein is only one kind of association relationship describing associated objects, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

In some embodiments of the present invention, an absorbent article is provided, and FIG. 1 is a schematic structural view of an absorbent article provided in some embodiments of the present invention; FIG. 2 is a schematic representation of the construction of a first absorbent layer in an absorbent article according to some embodiments of the present invention; FIG. 3 is a schematic view of the construction of a first absorbent layer in an absorbent article according to further embodiments of the present invention; FIG. 4 is a schematic representation of the structure of through-holes in a first absorbent layer in an absorbent article according to some embodiments of the present invention; FIG. 5 is a schematic cross-sectional structure of an absorbent article according to some embodiments of the present invention.

Referring to fig. 1-5, in some embodiments of the present invention, an absorbent article is provided that includes, in order from top to bottom (as can be understood from a direction closer to the skin of a person toward a direction away from the skin of the person), a topsheet 1, a first absorbent layer 2, a second absorbent layer 3, and a backsheet 4;

the first absorbent layer 2 is made of at least one perforated foam layer, the perforated foam layer comprises a first surface 201 and a second surface 202 which are arranged opposite to each other, the first surface 201 is closer to the top sheet 1 than the second surface 202, a plurality of through holes 211 are arranged on the first surface 201, the through holes 211 extend from the first surface 201 to the second surface 202, and the through holes 211 are arranged obliquely with respect to a central axis of the first surface 201 in the length direction.

The second absorbent layer 3 is made of at least one layer of super absorbent resin absorbent paper.

In the embodiment of the invention, for example, as shown in fig. 1, the absorbent article comprises a surface layer 1, a first absorption layer 2, a second absorption layer 3 and a bottom layer 4 from top to bottom in sequence, wherein the surface layer 1 is the side close to the skin of a human body and is in direct contact with the skin, and the bottom layer 4 is the side far away from the skin of the human body; the first absorbent layer 2 may also be referred to as the upper absorbent layer and the second absorbent layer 3 may also be referred to as the lower absorbent layer, the first absorbent layer 2 being closer to the topsheet than the second absorbent layer 3. In embodiments of the present invention, the first absorbent layer 2 is made of at least one perforated foam layer, for example, the first absorbent layer 2 may be made of one, two, three, four or more perforated foam layers, and in some preferred embodiments, the first absorbent layer 2 may be made of one or two perforated foam layers; the perforated foam layer means that the material of the absorption layer is foam material and is a foam material layer with a pore structure. The perforated foam layer comprises a first surface 201 and a second surface 202 arranged opposite to each other, wherein the first surface 201 is for example an upper surface and the second surface 202 is for example a lower surface, the first surface 201 is closer to the surface layer than the second surface 202, and the second surface 202 is closer to the second absorbent layer 3 than the first surface 201, i.e. the first surface 201 can be adapted to fit the lower surface of the surface layer 1 and the second surface 202 can be adapted to fit the upper surface of the second absorbent layer 3. The first surface 201 is provided with a plurality of through holes 211, for example, 2 to 100 through holes, further 5 to 80 through holes, further 8 to 40 through holes, and the like, and the specific number of the through holes is not limited in the embodiment of the present invention. The through-holes 211 extend from the first surface 201 to the second surface 202, e.g. each through-hole 211 may extend from the first surface 201 to the second through-hole 202, the through-hole 211 being a hole through the foam layer; the first surface 201 and the second surface 202 may be, for example, square, and the through hole 211 is disposed to be inclined with respect to a central axis of the first surface 201 in a length direction, that is, the through hole 211 is disposed to be inclined on the first surface, and the through hole 211 and the central axis of the first surface 201 in the length direction are disposed to form a certain angle.

It should be noted that the drawings of the present invention as shown in fig. 1 are stripped from each other to clearly illustrate the position relationship of the structural layers of the present invention, and it should be understood that the structural layers of the present invention are closely attached to each other. In the present invention, the surface layer, the first absorbent layer, the second absorbent layer, and the bottom layer may be bonded together in this order by, for example, a hot melt adhesive. In addition, in the embodiment of the present invention, the connection manner between the layers includes, but is not limited to, a manner of adhering by using a hot melt adhesive, and other connection manners known in the art may also be used, which is not limited in this embodiment of the present invention.

The absorbent article provided by the embodiment of the invention has the advantages of high liquid infiltration speed, high absorptivity, good dryness and the like. Particularly, the perforated foam material layer with the structure is used as the first absorption layer, so that the liquid infiltration speed can be increased more effectively. And at least one layer of super absorbent resin absorbent paper layer is adopted as the second absorption layer, so that liquid (such as menstrual blood or urine and other liquid) which is not absorbed by the first absorption layer can be quickly absorbed, the quick absorption of the liquid can be accelerated, the instant absorption and instant drying are realized, the absorption performance is strong, the dryness of the product can be ensured, the reverse osmosis is effectively reduced, and the use comfort is good.

In some embodiments, the absorbent article comprises at least one of a diaper, a pull-up pant, a sanitary napkin, a pantiliner, or a menstrual pant. Preferably, in some embodiments, the absorbent article is a sanitary napkin or a menstrual pant.

For convenience of description, the absorbent article and the method of making the absorbent article are described in detail in the examples of the present application in which the absorbent article is a sanitary napkin or a menstrual pant. However, it will be appreciated by those skilled in the art that the principles of the present invention may be implemented in any suitably arranged absorbent article and is not limited to sanitary napkins or catamenial pants, for example the absorbent article may also be a pull-up pant, a pant diaper or similar absorbent article. The embodiments of the present application are not particularly limited with respect to the size of the particular product for the absorbent article, such as a sanitary napkin or menstrual pant. Moreover, descriptions of well-known functions or constructions of the absorbent article may be omitted for clarity and conciseness.

Therefore, the absorbent article provided by the embodiment of the invention has the advantages of novel concept and simple structure, has the performances of high liquid infiltration speed, instant absorption (rapid absorption of liquid such as menstrual blood or urine), high absorption speed, high absorbability, good dryness, air permeability, coolness, softness, degradability, leakage prevention and the like, can rapidly absorb liquid, improves the whole softness and dryness, avoids the stuffy and damp feeling caused by the fact that menstrual blood cannot be rapidly absorbed, and greatly improves the comfort of a wearer.

In the embodiment of the present invention, the specific material of the perforated foam layer is not particularly limited, and a foam material known in the art and capable of being used in an absorbent article may be used. Illustratively, the perforated foam layer may be a perforated polyurethane foam layer, for example, although other types of foam materials may be used.

In some embodiments, the hole pattern of the through holes 211 comprises at least one of an oval shape, a semi-circle shape, a square shape (such as a square or rectangle), a trapezoid shape, a triangle shape, a strip shape (a long and narrow strip shape or a linear shape), a wave shape, a heart shape, or a star shape. Preferably, in some embodiments, the hole pattern of the through-hole is preferably elliptical in view of the liquid diffusion speed and the like. The through holes are arranged along the length direction of the first surface to form a row of through holes, at least two rows of the through holes are arranged on the first surface, for example, two rows of the through holes, four rows of the through holes, six rows of the through holes or more rows of the through holes are arranged on the first surface; the number of through holes included in each row is also not particularly limited in the present invention, and each row includes, for example, 2, 3, 4, 5, 6, 7 or more through holes, etc.

In some embodiments, the hole pattern of the through holes 211 is oval, and two corresponding through holes in two rows of through holes are distributed in a splayed shape; the through holes adopt a splayed perforation design, which is helpful for absorption and can accelerate liquid infiltration. In some embodiments, when the hole pattern of the through hole is elliptical, the minor axis length of the through hole is greater than or equal to 0.1mm, and for example, may be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, or greater than 0.8 mm; the length of the long axis of the through hole is more than or equal to 0.3mm, for example, the length can be 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm or more than 1.0 mm; the distance between two adjacent through holes in each row of through holes is more than or equal to 0.3cm, and can be 0.3cm, 0.4cm, 0.5cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm, 1.0cm or more than 1.0cm and the like. So design is favorable to the transmission of liquid between first absorption layer, can full play through-hole to the guide effect of liquid, also be no longer than the undersize of through-hole or too big simultaneously, influences the absorption capacity of first absorption layer.

In some embodiments, the through hole 211 has an inclination angle a with respect to the central axis of the first surface 201, where a satisfies: a is more than or equal to 30 degrees and less than or equal to 80 degrees, or a is more than or equal to 100 degrees and less than or equal to 150 degrees. It can be understood that the through holes in the two rows have different opening angles due to the splay perforation design of the through holes. For example, a row of through holes is provided above the longitudinal center axis of the first surface, a row of through holes is provided below the longitudinal center axis of the first surface, the inclination angle a of the upper row of through holes may range from 30 ° to 80 °, and the inclination angle a of the lower row of through holes may range from 100 ° to 150 °. Therefore, the inclination angle within the range can accelerate the liquid leakage speed, and is more beneficial to obtaining the optimal liquid infiltration speed.

In some embodiments, the perforated foam layer has a grammage of 30g/cm or more³For example, the grammage of the perforated foam layer may be 30g/cm³、35g/cm³、40g/cm³、50g/cm³、60g/cm³、80g/cm³、100g/cm³、120/cm³、150g/cm³、200g/cm³Or more than 200g/cm³And the like. In the present invention, in order to ensure high absorbency and overall strength of the first absorbent layer, that is, the perforated foam layer, to improve the absorbency of the first absorbent layer and to maintain the shape of the first absorbent layer after absorbing liquid, it is preferable to use the perforated foam layer in the aforementioned grammage range.

In some embodiments, the through hole 211 comprises a tapered hole section 212 with a gradually decreasing inner diameter in a direction from the first surface 201 to the second surface 201, and preferably, the through hole 211 further comprises a through hole section 213 with a constant inner diameter, the through hole section 213 is communicated with the tapered hole section 212, and the through hole section 213 is closer to the second surface 202 than the tapered hole section 212. That is, in some embodiments, the through-hole may include only a tapered hole section, or in other embodiments, the through-hole may include both a tapered hole section and a through-hole section, and in still other embodiments, the through-hole may include only a through-hole section. Preferably, the through hole comprises a tapered hole section and a through hole section. In the embodiment of the invention, the cross section of the through hole can be funnel-shaped or trapezoidal, so that the liquid reverse osmosis can be effectively reduced.

In the embodiment of the invention, the tapered hole section may be one tapered hole section, or more than two tapered hole sections with different hole wall inclinations may be formed by sequentially communicating, or more than two tapered hole sections may be formed by combining with more than one through hole section, as long as the aperture of the tapered hole section satisfies the trend of gradually reducing from one end to the other end or gradually reducing as a whole. As an optional embodiment, the through hole section is one, and the through hole section and the conical hole section are communicated with each other to form the through hole. As another alternative, the through hole does not comprise a through hole section, and the through hole is a conical hole section, so that the through hole is convenient to process and manufacture.

In some embodiments, the angle between the hole wall of the tapered hole section 212 and the axis of the through hole 211 may be, for example, 5 ° to 85 °, further 10 ° to 75 °, further 15 ° to 45 °. The included angle in the range is convenient to process and manufacture, and is also beneficial to the flow of liquid, so that the leakage of the liquid is smoother, the absorbability is enhanced, and the reverse osmosis is prevented.

In some embodiments, the super absorbent resin absorbent paper layer is a wet-process super absorbent resin absorbent paper layer formed by uniformly distributing super absorbent resin between two raw paper layers made of wood pulp through a wet papermaking process, and the wet-process super absorbent resin absorbent paper layer includes two raw paper layers and a super absorbent resin layer interposed between the two raw paper layers.

In particular, the wet-process super absorbent resin absorbent paper layer is formed by uniformly distributing super absorbent resin between two raw paper layers made of wood pulp through the existing wet-process paper-making process (for example, the wet-process paper-making process disclosed in chinese patent application CN 201710966882.0). The specific forming process of the wet papermaking process can be as follows: (1) respectively carrying out net-surfing molding on the surface sizing agent and the bottom sizing agent to prepare wet surface layer base paper and wet bottom layer base paper; the relative water content of the wet surface layer base paper and the wet bottom layer base paper is 50-80%; (2) respectively spraying the wet surface layer base paper and the wet bottom layer base paper prepared in the step (1) with super absorbent resin, and compounding the wet surface layer base paper and the wet bottom layer base paper which are respectively sprayed with the super absorbent resin to prepare wet raw paper; (3) and (3) sequentially squeezing and drying the wet raw paper sheet prepared in the step (2) to prepare the super absorbent resin absorbent paper, namely the super absorbent resin absorbent paper layer. The raw paper layer is prepared by taking wood pulp and/or fluff pulp as raw materials.

In the embodiment of the invention, the super absorbent resin is added into the wet-process manufactured super absorbent resin absorbent paper formed in the wet-process paper making mode at the early stage of the formation of the wood pulp paper layer, and the super absorbent resin is compounded with the paper fiber at the early stage of the formation of the paper sheet, so that the super absorbent resin is completely embedded in the paper fiber, the contact area of the super absorbent resin and the fiber is greatly increased, and the conductivity of the paper fiber and the super absorbent resin to liquid is enhanced, thereby greatly increasing the liquid absorption capacity and the liquid absorption speed of the wet-process manufactured super absorbent resin absorbent paper obtained by formation.

The embodiment of the invention has no special requirements on the performance index of the adopted super absorbent resin, for example, the super absorbent resin can be various existing series of super absorbent resins. In some preferred embodiments, the gram weight of the super absorbent resin is 10-300 g/m²The particle size is 30-100 meshes, the water retention capacity is not lower than 25g/g, and the liquid passing capacity is not lower than 0.1 mL/min. Further, in some preferred embodiments, the grammage of the superabsorbent resin is 50g/m²～200g/m²The grain diameter is 40-80 meshes, the water retention capacity is not lower than 30g/g, and the liquid passing capacity is not lower than 0.5 mL/min.

In some embodiments, the grammage of the wet-process-made super absorbent resin absorbent paper layer is 20-300 g/m²Preferably 70 to 150g/m². In the present invention, in order to ensure high absorbency and overall strength of the wet-process super absorbent resin absorbent paper layer as the second absorbent layer, and to improve the absorbency of the second absorbent layer so that the second absorbent layer can maintain its shape after absorbing liquid, it is preferable to use the wet-process super absorbent resin absorbent paper layer having the aforementioned grammage range.

In addition, the second absorption layer manufactured by the super absorbent resin water absorption paper layer manufactured by the wet method can play a role in guiding and diffusing, can quickly seep down the liquid sucked from the first absorption layer, simultaneously reduces the probability of upward reverse seepage of menstrual blood, reduces the contact time of the menstrual blood and skin, and improves the absorption capacity and the air permeability. In addition, the sanitary towel can also ensure that the absorption and water storage of the bottom of the sanitary towel are better, can meet the use requirements of consumers and has good popularization prospect.

In some embodiments, the surface layer 1 is made of a hot air non-woven fabric, a spun-bonded non-woven fabric or a pure cotton non-woven fabric, which can increase the comfort of use. Preferably, the hot-air non-woven fabric is a fine-denier hot-air non-woven fabric (fine-denier hot-air non-woven fabric), and the denier of the fine-denier hot-air non-woven fabric is 0.5-2.5 denier. So, more soft, comfortable when can be so that top layer and human laminating, the compliance is better, and the travelling comfort of person of wearing is better.

In some embodiments, the bottom layer 4 has degradability and breathability, and is made of a degradable breathable material, that is, the bottom layer can be a degradable breathable bottom film layer. In the embodiments of the present invention, the specific material of the degradable breathable base film layer is not particularly limited, and any material may be used as long as it is degradable, has a certain breathability, can be applied to an absorbent article, and does not limit the object of the present invention. Illustratively, the degradable breathable basement membrane layer can be a corn fiber basement membrane or a waterproof basement membrane made of other degradable materials (such as a degradable biological membrane made of straws, straws and the like), and is degradable and good in breathability, so that a human body can be kept in a healthy state at any time. Alternatively, the degradable bottom layer can be formed by blending a corn fiber layer, a polyhydroxyalkanoate fiber layer and a wood pulp viscose fiber layer. By adopting the degradable bottom layer, the whole product can be degraded, thereby reducing white pollution and improving the ecological environment.

In some embodiments, the absorbent article further comprises side leakage preventing layers 5 on both sides in the width direction of the second absorbent layer 3;

the side leakage prevention layer 5 is made of water-repellent non-woven fabric and is transversely widened; the side leakage preventing layer 5 is bonded with part of the lower surface of the second absorption layer 3 to form an overlapping area, the width of the overlapping area is more than or equal to 5mm, for example, the width of the overlapping area can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm or more than 10mm, etc.

In the embodiment of the invention, the side leakage-proof layer can be formed by pure cotton spunlace nonwoven fabrics subjected to water repellent treatment. The grammage of the side leakage preventing layer may be, for example, 10 to 50g/m². Material mining of side leakage prevention layerAfter the pure cotton spunlace non-woven fabric subjected to water repellent treatment is used, the degradability of the sanitary towel is further improved, the side permeation phenomenon of the sanitary towel can be eliminated, the air permeability of the surface of the sanitary towel is effectively improved, and a wearer can feel more comfortable and sanitary.

In some embodiments, the absorbent article is an hourglass-shaped absorbent article; the surface layer in the hourglass-shaped absorbent article is covered on the upper part of the first absorbent layer and extends along the bottom surface of the second absorbent layer from two sides of the second absorbent layer; the surface layer forms a semi-enclosed structure to the bottom surface of the second absorption layer. In the embodiment of the present invention, the top sheet and the bottom surface of the second absorbent layer may be bonded together by using a hot melt adhesive, for example, two overlapped side portions of the top sheet and the second absorbent layer may be bonded together by using a hot melt adhesive to form an hourglass-shaped structure. In the present invention, the suspended structure may be written as a suspended hourglass-shaped structure or an hourglass-shaped structure.

In the embodiment of the invention, the hourglass-shaped absorbent article changes the structural form that the surface layer is covered on the absorption layer and the bottom layer is compounded below the absorption layer in the conventional absorbent article, can form a suspended absorption layer structure, so that the surface forms a wrapping structure for the first absorption layer and the second absorption layer, the bottom surface of the second absorption layer is not or incompletely compounded with the bottom layer directly, the upper surface and the bottom surface of the second absorption layer can absorb liquid, the absorption speed is further accelerated, the absorption area is increased, and the absorption capacity is further increased. It should be noted that, the suspension-type absorption layer is a structure in which the surface layer forms a wrapping structure for the second absorption layer, so that the bottom surface of the second absorption layer is not or not completely directly combined with the bottom layer, and the second absorption layer is in a "suspension" structure relative to the bottom layer.

The surface layer forms a semi-surrounding structure for the bottom surface of the second absorption layer, namely the two sides of the surface extending along the bottom surface of the second absorption layer are not closed, and the surface layer completely wraps the upper surface of the first absorption layer and covers part of the bottom surface of the second absorption layer, so that the second absorption layer and the bottom layer of the bottom surface form a half-width composite structure form. So, can increase about 40% imbibition area, promote the imbibition speed of first absorbed layer and second absorbed layer, can also reduce the edge leakage risk. It should be understood that the semi-enclosed and semi-enclosed composites described herein are not surface-wrapped to the general area of the bottom surface of the second absorbent layer, but are understood to be surface-wrapped to the bottom surface of the second absorbent layer but not completely wrapped.

In some embodiments, there is also provided a method of making an absorbent article as described above, comprising the steps of:

The preparation process of the absorbent article is simple, easy to control, high in feasibility and easy to operate, and is suitable for industrial mass production. The absorptive article obtained by the preparation method has the characteristics of high infiltration speed, large absorption capacity, instant absorption, instant drying, high absorption performance, good dryness, air permeability, softness, comfort, degradability and the like.

It should be understood that the manufacturing method of the absorbent article is based on the same inventive concept as the aforementioned absorbent article, and the description of the specific structure, material or composition of the absorbent article can be referred to the aforementioned description of the absorbent article, and will not be repeated herein.

In some embodiments, the method of making the absorbent article comprises the steps of:

(1) and (2) punching the foam material layer by adopting punching equipment to form a punched foam material layer, and compounding the punched foam material layer serving as a first absorption layer with a second absorption layer formed by a super absorbent resin absorbent paper layer.

(2) And (3) wrapping the surface layer with the first absorption layer, extending the surface layer from two sides of the second absorption layer along the bottom surface of the second absorption layer, and forming a semi-surrounding structure on the bottom surface of the second absorption layer by the surface layer to obtain the absorption piece A.

(3) And respectively covering the side leakage prevention layers with two widened sides on the degradable breathable bottom layer, and then compounding the obtained absorption piece A on the side leakage prevention layers to obtain the absorbent article.

In order to fully illustrate the relevant properties of the absorbent articles provided by the present invention and facilitate understanding of the present invention, the present invention has been subjected to multiple sets of experimental validation. The present invention will be further described with reference to the following examples. It will be appreciated by those skilled in the art that the present invention has been described in relation to only some of the examples and that any other suitable embodiment is within the scope of the invention.

Example 1

An absorbent article (sanitary towel) comprises a surface layer, a first absorption layer, a second absorption layer and a bottom layer from top to bottom in sequence; the absorption article is an hourglass type absorption article, the surface layer in the hourglass type absorption article covers the upper part of the first absorption layer and extends along the bottom surface of the second absorption layer from two sides of the second absorption layer; the surface layer forms a semi-surrounding structure for the bottom surface of the second absorption layer; the two overlapped side parts of the surface layer and the second absorption layer can be bonded by hot melt adhesive to form an hourglass-shaped structure. The absorbent article further comprises side leakage preventing layers positioned on both sides in the width direction of the second absorbent layer; the side leakage prevention layer is made of water-repellent non-woven fabric and is transversely widened; the side leakage prevention layer and part of the lower surface of the second absorption layer are bonded together to form an overlapping area, and the width of the overlapping area is 6 mm. The surface layer is made of fine denier hot-air non-woven fabric, and the denier of the fine denier hot-air non-woven fabric is 0.5-2.5 denier; the bottom layer has degradability and air permeability, and is made of degradable air-permeable materials (for example, the bottom layer is formed by blending a corn fiber layer, a polyhydroxyalkanoate fiber layer and a wood pulp viscose fiber layer). The first absorbent layer is made of a layer of perforated foam material, the perforated foam material layer comprising a first surface and a second surface arranged opposite to each other, the first surface being closer to the surface layer than the second surface, the first surface being provided with a plurality of through holes extending from the first surface to the second surface, the through holes having a length relative to the first surfaceThe direction central axis is obliquely arranged. The hole pattern of the through holes is oval, and two corresponding through holes in the two rows of through holes are distributed in a splayed shape; the through holes adopt a splayed perforation design, which is helpful for absorption and can accelerate liquid infiltration. The length of the short axis of each through hole is 0.2mm, the length of the long axis of each through hole is 0.5mm, and the distance between every two adjacent through holes in each row of the through holes is 0.3 cm. The angle of inclination of the through hole with respect to the longitudinal central axis of the first surface is a, and a is 45 ° or 135 °. The grammage of the perforated foam layer is 80g/cm³. In the direction from the first surface to the second surface, the through hole comprises a taper hole section with gradually reduced inner diameter, the through hole further comprises a through hole section with unchanged inner diameter, the through hole section is communicated with the taper hole section, and the through hole section is closer to the second surface than the taper hole section; the through-hole cross-sectional shape is, for example, funnel-shaped. The second absorption layer is made of a super absorbent resin absorbent paper layer. The super absorbent resin absorbent paper layer is a wet-process manufactured super absorbent resin absorbent paper layer, the wet-process manufactured super absorbent resin absorbent paper layer is formed by uniformly distributing super absorbent resin between two raw paper layers made of wood pulp through a wet-process papermaking process, and the wet-process manufactured super absorbent resin absorbent paper layer comprises two raw paper layers and a super absorbent resin layer clamped between the two raw paper layers. The gram weight of the super absorbent resin absorbent paper layer manufactured by the wet method is 120g/m². The grammage of the super absorbent resin used in this example was 150g/m²The particle size is 40-80 meshes, the water retention capacity is 30g/g, and the liquid passing capacity is 35 mL/min.

Example 2

Embodiment 2 is basically the same as embodiment 1, and the same parts are not described again, except that:

the first absorbent layer is made of an unperforated foam layer. That is, the foam layer in example 1 has a cellular structure, whereas the foam layer in example 2 has no cellular structure.

Example 3

Embodiment 3 is basically the same as embodiment 1, and the description of the same parts is omitted, except that:

the absorbent article comprises a surface layer, an absorption layer and a bottom layer from top to bottom in sequence, wherein the absorption layer is formed by mixing fluff pulp and super absorbent resin; the top and bottom layers and the remaining structure in example 3 were the same as in example 1.

Example 4

Embodiment 4 is basically the same as embodiment 1, and the description of the same parts is omitted, except that:

the second absorption layer is made of dry-process super absorbent resin absorbent paper.

In the present invention, the performance test was performed on one of the absorbent articles of examples 1 to 4, and the results of the performance test are shown in table 1.

The test method comprises the following steps: taking animal blood for 2 times, each time is 5mL, the interval of 2 times is 10 minutes, and recording the time for completing each absorption as the absorption speed in unit of s; reverse osmosis is that after the sanitary towel absorbs the animal blood, 10g of filter paper is pressed by a 1.2kg weight and placed on the sanitary absorbent article for 1min, and the gram weight increased by the filter paper is weighed and is unit g.

TABLE 1 results of the Performance test of the examples

As can be seen from the data in the above comparative Table 1, the absorbent article of example 1 has a high absorption rate and good dryness, and effectively reduces the amount of reverse osmosis.

The invention has not been described in detail and is in part known to those of skill in the art.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. An absorbent article characterized by:

the absorbent article comprises a surface layer, a first absorption layer, a second absorption layer and a bottom layer from top to bottom in sequence;

the first absorption layer is made of at least one perforated foam material layer, the perforated foam material layer comprises a first surface and a second surface which are oppositely arranged, the first surface is closer to the surface layer than the second surface, a plurality of through holes are arranged on the first surface, the through holes extend from the first surface to the second surface, and the through holes are obliquely arranged relative to the central axis of the first surface in the length direction;

2. The absorbent article of claim 1, wherein: the hole pattern of the through hole comprises at least one of an ellipse, a semicircle, a square, a trapezoid, a triangle, a strip, a wave, a heart or a star; and/or

3. The absorbent article of claim 2 wherein: the hole pattern of the through holes is oval, and two corresponding through holes in the two rows of through holes are distributed in a splayed shape;

4. The absorbent article of claim 1, wherein: in the direction from the first surface to the second surface, the through hole comprises a taper hole section with gradually reduced inner diameter, and preferably, the through hole further comprises a through hole section with unchanged inner diameter, the through hole section is communicated with the taper hole section, and the through hole section is closer to the second surface than the taper hole section; and/or

5. The absorbent article of claim 1, wherein said super absorbent resin absorbent paper layer is a wet-process super absorbent resin absorbent paper layer formed by uniformly distributing super absorbent resin between two raw paper layers made of wood pulp by a wet-process papermaking process, said wet-process super absorbent resin absorbent paper layer comprising two raw paper layers and a super absorbent resin layer sandwiched between the two raw paper layers.

6. The absorbent article of claim 5 wherein: the gram weight of the super absorbent resin absorbent paper layer manufactured by the wet method is 20-300 g/m²(ii) a And/or

7. The absorbent article of claim 1, wherein: the surface layer is made of a hot-air non-woven fabric or a spun-bonded non-woven fabric or a pure cotton non-woven fabric, preferably, the hot-air non-woven fabric is a fine-denier hot-air non-woven fabric, and the denier of the fine-denier hot-air non-woven fabric is 0.5-2.5 denier; and/or

8. Absorbent article according to any of claims 1 to 7, characterized in that: the absorbent article further comprises side leakage preventing layers positioned on both sides in the width direction of the second absorbent layer;

9. Absorbent article according to any of claims 1 to 7, characterized in that: the absorbent article is an hourglass-shaped absorbent article;

10. A method of manufacturing an absorbent article according to any of claims 1 to 9, comprising the steps of: