CN115715722A - A sanitary napkin or pad containing natural plant material and its preparation method - Google Patents
A sanitary napkin or pad containing natural plant material and its preparation method Download PDFInfo
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Abstract
The invention relates to the field of absorbent sanitary products, and discloses a flushable sanitary towel or pad containing natural plant materials and a preparation method thereof. The flushable sanitary towel or pad comprises a water dispersible absorption layer and a water dispersible liquid separation layer which are overlapped up and down; the water dispersion liquid separation layer comprises a natural plant sheet layer; the natural plant sheet layer is formed by stacking dry plant sheets; the dry plant sheet comprises dry plant petals and/or dry plant leaves. The water-dispersible liquid-separating layer formed by stacking dry plant sheets can effectively prevent liquid in the water-dispersible absorbing layer from overflowing downwards, and meanwhile, the sanitary towel or the sanitary pad has better air permeability and water dispersibility.
Description
Technical Field
The invention relates to the field of absorbent sanitary products, in particular to a flushable sanitary towel or pad containing natural plant materials and a preparation method thereof.
Background
The disposable sanitary products such as sanitary towels, protection pads and the like bring convenience to the life of people and also bring great pressure to environmental protection. How these disposable absorbent sanitary articles are disposed of after use has become an important problem that plagues consumers and even the whole society.
As is well known, most of the conventional absorbent sanitary products such as sanitary napkins and panty liners are made of polymer synthetic materials, and the products cannot be recycled and naturally degraded after being discarded, and become new white pollution. A large amount of absorption sanitary product garbage such as sanitary towels, protection pads and the like generated every day can be only treated in a burying and burning mode, and serious harm is brought to the environment. Therefore, the development of sanitary products with degradable properties has become an industrial focus, and many degradable and absorbable sanitary products (such as patents CN202120575464.0, CN 201520793812.6) have been developed at present.
The degradable and absorbable sanitary products are made of a bio-based degradable material or a degradable high polymer material, can realize natural degradation, but have the defects that the degradable and absorbable sanitary products do not have the flushability, namely the requirement specified by INDA EDANA 'flushability evaluation guidelines for disposable non-woven products' cannot be met, the degradable and absorbable sanitary products can be treated in a landfill or incineration mode like common garbage after being used, and the degradable and absorbable sanitary products can pollute soil and the atmospheric environment for a long time.
In practice, the best way to dispose of absorbent sanitary articles such as sanitary napkins and panty liners is to throw them into a toilet bowl, disperse them in water and then flush them off by releasing water. The treatment mode is simple and convenient, and can avoid the problems of bacterial breeding, mosquito gathering and the like, thereby saving the garbage treatment cost. For the flushable sanitary towel or the sanitary pad, in order to meet the use requirements, the product is required not only to have no liquid leakage and better air permeability in the use process, but also to be quickly dispersed and disintegrated in water after being used. How to solve the contradiction between the leakage resistance, the air permeability and the flushability of the product is the biggest problem in the development of the products.
Disclosure of Invention
The invention provides a flushable sanitary towel or a pad containing natural plant materials and a preparation method thereof, aiming at solving the technical problem that the sanitary towel or the pad cannot give consideration to leakage resistance, air permeability and flushability. The water-dispersible liquid-separating layer formed by stacking the dry plant sheets is adopted, so that the sanitary towel or the panty liner can have better leakage resistance, air permeability and flushability.
The specific technical scheme of the invention is as follows:
in a first aspect, the present invention provides a flushable sanitary napkin or pad containing natural plant materials, comprising a water-dispersible absorbent layer and a water-dispersible liquid-separating layer stacked one on top of the other; the water dispersion liquid separation layer comprises a natural plant sheet layer; the natural plant sheet layer is formed by stacking dry plant sheets; the dry plant sheet comprises dry plant petals and/or dry plant leaves.
The natural plant has natural aromatic smell and can inhibit bacteria and remove odor. The invention takes the stacked dry plant sheets as the water dispersion liquid separation layer to be overlapped with the water dispersion absorption layer, and can play the following roles: in the water-dispersible liquid-separating layer, the plant leaves and the petals have rough surfaces with different microstructures, and the surfaces of the plant leaves and the petals have hydrophobic epidermal waxiness, so that the water-dispersible liquid-separating layer can effectively prevent liquid in the water-dispersible absorbing layer from overflowing downwards when the sanitary towel or the sanitary pad is used. Meanwhile, the dry plant sheet has a plurality of micro pores inside, so that the water-dispersible liquid-separating layer can be endowed with better air permeability. After the sanitary towel or the sanitary pad is used, the water-dispersible liquid-proof layer formed by stacking the dry plant sheets can be rapidly dispersed and fragmented in water, so that the sanitary towel or the sanitary pad has better flushability. Therefore, the water-dispersible liquid-separation layer in the invention can enable the sanitary towel or the panty liner to have better leakage resistance, air permeability and flushability.
Preferably, the surface of the dry plant sheet is of a non-smooth structure, the surface of the dry plant sheet is provided with a hydrophobic substance, and the hydrophobic substance is one or a combination of epidermal wax, epidermal hair and epidermal powder.
Theoretical research and a great deal of experiments carried out by the research and development team of the invention find that when the dry plant sheet with the structure is selected, the non-smooth structure and the hydrophobic substance on the surface of the dry plant sheet can be utilized to endow the water dispersion spacer layer with higher hydrophobicity, and specifically: hydrophobic substances on the surface of the plant can enable the plant to have water repellency, and rough surfaces of a micron mastoid structure, a concave cell structure, a micron mastoid and nanometer fold composite structure and the like on the surface of the plant can enhance the hydrophobicity, so that more air is locked on the surface, and the contact area with water is reduced.
Further, the dry plant sheet material comprises one or more of dry Ai Shepian, dry rose petals, dry chrysanthemum petals, dry calendula and dry motherwort tablets.
Preferably, the thickness of the dry plant sheet is less than or equal to 1.5mm; the size of each edge in the natural plant sheet is more than or equal to 2mm.
Theoretical research and repeated experiments show that the dry plant sheets cannot be too small in size, so that the stacking is not uniform easily due to too small size, and the water dispersion spacer liquid layer has gaps and poor leakage-proof effect; meanwhile, the thickness of the dry plant sheet cannot be too high, and too high easily causes the air permeability of the aqueous dispersion liquid-separating layer to be reduced.
Preferably, the water dispersible spacer layer further comprises a water dispersible lining layer arranged below the natural plant sheet layer; the preparation method of the water-dispersed liquid-separating layer comprises the following steps:
scheme A: stacking and forming dry plant sheets, fumigating the dry plant sheets to stretch and soften the dry plant sheets, rolling the dry plant sheets into thin sheets, drying the thin sheets, and adhering the thin sheets to a water dispersion lining gasket layer to obtain a water dispersion liquid separation layer;
scheme B: stacking and forming dry plant sheets, fumigating the dry plant sheets to stretch and soften the dry plant sheets, laminating and fixing the dry plant sheets with a water dispersion liner sheet, rolling the dry plant sheets into thin sheets, and drying the thin sheets to obtain a water dispersion liquid separation layer;
scheme C: uniformly dispersing the dry plant sheets in liquid, and preparing wet natural plant sheets by wet forming; and dehydrating, rolling and drying the wet natural plant sheet layer, and then adhering the sheet layer to the water dispersion lining gasket layer to obtain the water dispersion liquid separation layer.
In the preparation process, the pores among the dry plant sheets can be reduced through rolling, so that the leakage resistance of the water dispersion liquid-separation layer is improved; and the rolling mode can avoid the adhesion and entanglement among the dry plant sheets, so that the dry plant sheets are easier to disperse and fragment in water. Through fumigating, can make the dry plant sheet relax and expand naturally, be favorable to constructing the water dispersion and separate the liquid layer to, petal or blade after fumigating can soften, and difficult breakage in the rolling in-process is favorable to constructing the ultra-thin water dispersion and separate the liquid layer that has high antiseep.
Preferably, a water dispersion surface layer is arranged above the water dispersion absorption layer; a water dispersion bottom layer is arranged below the water dispersion liquid separation layer.
Preferably, the periphery of the water-dispersible surface layer extends downward and is attached to the upper surface of the water-dispersible bottom layer, and the peripheries of the water-dispersible absorbent layer and the water-dispersible barrier layer are covered and fixed by the water-dispersible surface layer and the water-dispersible bottom layer.
Preferably, the upper surface of the natural plant sheet layer is provided with a groove matched with the water dispersion absorption layer; the water dispersion absorption layer is embedded in the groove.
In use, the joint of the edges of the surface layer and the bottom layer of the sanitary towel or the protective pad is easy to lose efficacy after contacting with menstrual blood, so that the joint structure is damaged, and particularly, the menstrual blood is easy to rapidly permeate to the joint structure at the edge of the water dispersible absorption layer. Therefore, the water-dispersible absorption layer is embedded in the groove on the natural plant sheet layer, menstrual blood can be prevented from diffusing to the joint structure from the edge of the water-dispersible absorption layer, and the structural stability of the sanitary towel or the panty liner in use is improved.
Preferably, in the A, B and C, the rolling is a local rolling, and the rolling range is matched with the size of the water dispersible absorption layer.
By adopting a local rolling mode, a groove for embedding the water dispersion absorption layer can be formed on the natural plant sheet layer, so that the menstrual blood is prevented from diffusing to the joint of the water dispersion surface layer and the water dispersion bottom layer from the edge of the water dispersion absorption layer, and the joint structure is prevented from losing efficacy.
Preferably, the periphery of the water dispersible absorption layer is provided with a hydrophobic area.
The hydrophobic area is arranged on the periphery of the water-dispersible absorption layer, so that menstrual blood can be prevented from diffusing to the joint of the water-dispersible surface layer and the water-dispersible bottom layer from the edge of the water-dispersible absorption layer, and the joint structure between the two layers has better stability during the use of the sanitary towel or the panty liner.
Further, the hydrophobic region comprises non-defatted seed fiber.
Preferably, a water-repellent coating strip is arranged on the water-dispersible surface layer above the edge of the water-dispersible absorption layer.
In use, the phenomenon that menstrual blood permeates into the sanitary towel or the sanitary pad and flows on the surface of the sanitary towel or the sanitary pad exists simultaneously, the water-repellent coating strips are arranged at the positions, corresponding to the edges of the water-dispersible absorption layer, on the water-dispersible surface layer, the water-repellent coating strips can prevent the menstrual blood from flowing into the surface layer to the edges, and then the menstrual blood is prevented from permeating into the joint of the water-dispersible surface layer and the water-dispersible bottom layer, so that the sanitary towel or the sanitary pad has better structural stability during use.
Further, the water-repellent coating strip is of a concave type.
Preferably, a flow guide layer is arranged between the water-dispersible surface layer and the water-dispersible absorption layer.
Preferably, the water dispersible backing sheet layer is composed of flushable fibers and/or water soluble fibers; or the water dispersion lining gasket layer is a water-soluble film.
Preferably, the water dispersible absorbent layer comprises one or more of fluff pulp fibers, cotton linters and regenerated ultra short cellulose fibers.
Further, the regenerated ultrashort cellulose fibers include one or more of viscose fibers, lyocell (Lyocell) fibers, modal fibers and cuprammonium fibers; the length of the regenerated ultra-short cellulose fiber is 2 to 8mm, and more preferably 2 to 4mm.
Further, the water dispersible absorption layer also comprises a high molecular water absorption material; the high molecular water-absorbing material comprises one or more of high molecular water-absorbing resin (SAP), carrageenan, sodium carboxymethyl cellulose, sodium alginate, guar gum and xanthan gum.
Preferably, the water-dispersible absorbent layer comprises a natural plant material that emits a fragrance.
Further, the natural plant material capable of emitting fragrance includes powder and/or fiber natural plant material.
Preferably, the water dispersible surface layer and/or the water dispersible bottom layer are made of fiber materials through wet forming; the fibrous material comprises hydrophobic cellulosic fibers; the hydrophobic cellulosic fibers include cotton fibers and/or kapok fibers that have been refined and not degreased.
The hydrophobic cellulose fiber is added into the water-dispersible surface layer, so that the surface layer has weak water repellency, the area of liquid diffused in the surface layer in the using process is reduced, and the dryness of the surface layer is kept.
The cotton fiber has a natural bent structure, and is easy to form entanglement in wet forming, so that cotton blocks are generated; the kapok fiber has a hollow structure, the density of the kapok fiber is far lower than that of water, and the kapok fiber is easy to float and agglomerate in the wet forming process, so that the material is uneven and water is repelled on a single surface finally. Therefore, the cotton fibers and the kapok fibers are subjected to pulping treatment, so that natural flexure of the cotton fibers can be eliminated, the hollow structure of the kapok fibers can be damaged, and the surface layer materials are uniform and consistent, so that the kapok fibers have better flushability and absorption performance.
In a second aspect, the present invention provides a method for preparing said flushable sanitary napkin or pad, comprising the steps of: s1: the water dispersion bottom layer, the water dispersion liquid separation layer and the water dispersion absorption layer are sequentially overlapped from bottom to top; wherein, the water dispersible bottom layer and the water dispersible liquid-separating layer are adhered and fixed by a water soluble adhesive;
s2: and (3) overlapping the water-dispersible surface layer on the water-dispersible absorption layer, pressing along the edge of the water-dispersible surface layer to connect the water-dispersible surface layer with the periphery of the water-dispersible bottom layer, and covering and fixing the water-dispersible absorption layer and the water-dispersible spacer layer to obtain the flushable sanitary towel or pad.
The invention needs to be explained as follows:
the invention refers to the conditions of 'dispersible' and 'water dispersible' which are one of the test standards of INDA EDANA 'evaluation guideline for dispersibility of disposable nonwoven product' (INDA), 'GB/T40181-2021 method for testing dispersibility of disposable sanitary nonwoven material and evaluation thereof, and' GB/T41244-2022 nonwoven material and product for dispersing spunlace.
Compared with the prior art, the invention has the following advantages:
(1) The water-dispersible liquid-separating layer formed by stacking dry plant sheets can effectively prevent liquid in the water-dispersible absorbing layer from overflowing downwards, and meanwhile, the sanitary towel or the sanitary pad has better air permeability and water dispersibility;
(2) The contradiction between flushability and structural stability during use of the sanitary towel or the protective pad can be solved by embedding the water-dispersible absorption layer in the groove on the natural plant sheet layer or arranging the hydrophobic area on the periphery of the water-dispersible absorption layer and/or arranging the water-repellent coating strip on the water-dispersible surface layer above the edge of the water-dispersible absorption layer;
(3) The cotton fiber and/or kapok fiber treated by the abrasive slurry is adopted in the water-dispersible surface layer and/or the water-dispersible bottom layer, so that the natural flexure of the cotton fiber can be eliminated, the hollow structure of the kapok fiber can be damaged, and the surface layer and/or the bottom layer have better flushability and absorption performance.
Drawings
FIG. 1 is a schematic cross-sectional view of the flushable sanitary napkin of examples 1 and 5;
FIG. 2 is a schematic representation of the surface structure of the flushable sanitary napkin of examples 1, 3 and 5;
FIG. 3 is a schematic cross-sectional view of the flushable sanitary napkin of example 2;
FIG. 4 is a schematic surface structure of the flushable sanitary napkin of example 2;
FIG. 5 is a schematic cross-sectional view of the flushable sanitary napkin of example 3;
FIG. 6 is a schematic cross-sectional view of the flushable pad of example 4;
FIG. 7 is a schematic view of the surface structure of the flushable pad of example 4;
FIG. 8 is a schematic cross-sectional view of the flushable sanitary napkin of example 6;
FIG. 9 is a schematic surface structure of the flushable sanitary napkin of example 6;
FIG. 10 is a schematic diagram of a construction of a water-dispersible liquid-separating layer;
fig. 11 is a schematic view of a structure of a water-dispersible liquid-separating layer.
The reference signs are: the water-dispersing water-repellent paint comprises a water-dispersing surface layer 1, water-dispersing coating strips 101, a water-dispersing absorption layer 2, a hydrophobic region 201, a water-dispersing partition layer 3, a natural plant sheet layer 301, a water-dispersing lining layer 302, a groove 303, a water-dispersing bottom layer 4 and a diversion layer 5.
Detailed Description
The present invention will be further described with reference to the following examples.
General examples
A flushable sanitary napkin or pad containing natural plant material comprises a water dispersion surface layer 1, a water dispersion absorption layer 2, a water dispersion liquid-separating layer 3 and a water dispersion bottom layer 4 from top to bottom as shown in figures 1, 3, 5, 6 and 8. As shown in fig. 10 and 11, the water-dispersible liquid-barrier layer 3 includes a natural plant sheet 301, and a water-dispersible liner sheet layer 302 provided under the natural plant sheet 301. The natural plant sheet layer 301 is formed by stacking dry plant sheets; the dry plant sheet comprises dry plant petals and/or dry plant leaves; the surface of the dry plant sheet is of a non-smooth structure, and the surface of the dry plant sheet is provided with a hydrophobic substance; the hydrophobic substance is one or more of epidermal wax, epidermal hair and epidermal powder. As shown in fig. 5, a flow guide layer 5 is disposed between the water dispersion surface layer 1 and the water dispersion absorbent layer 2 as a specific embodiment, wherein the periphery of the water dispersion surface layer 1 extends downward and is attached to the upper surface of the water dispersion bottom layer 4, and the peripheries of the water dispersion absorbent layer 2 and the water dispersion partition layer 3 are covered and fixed by the water dispersion surface layer 1 and the water dispersion bottom layer 4.
As a specific embodiment, the dry plant sheet material comprises one or more of dry Ai Shepian, dry rose petals, dry chrysanthemum petals, dry calendula and dry motherwort tablets.
As a specific embodiment, as shown in fig. 1, 5, 8 and 10, the upper surface of the natural plant sheet 301 is provided with a groove 303 matched with the water dispersion absorption layer 2; the water-dispersible absorption layer 2 is embedded in the groove 303.
In one embodiment, as shown in fig. 3, the water dispersible absorbent layer 2 is provided with a hydrophobic region 201 at the periphery; the hydrophobic region 201 includes non-defatted seed fibers therein.
In one embodiment, as shown in fig. 1 to 7, a water-repellent coating strip 101 is provided on the water-dispersible surface layer 1 above the edge of the water-dispersible absorbent layer 2. Optionally, the water-repellent coating strip 101 is concave and has a width of 0.5 to 4mm (more preferably 1 to 2 mm).
In one embodiment, the water dispersible backing layer 302 is made of flushable fibers and/or water soluble fibers, or is a water soluble film.
As a specific embodiment, the water dispersible absorption layer 2 comprises one or more of fluff pulp fiber, cotton linter and regenerated ultra-short cellulose fiber, and also comprises a high molecular water absorption material and a natural plant material capable of emitting fragrance. Optionally, the regenerated ultrashort-cellulose fibers include one or more of viscose, lyocell (Lyocell), modal, and cuprammonium fibers; the high molecular water-absorbing material comprises one or more of high molecular water-absorbing resin (SAP), carrageenan, sodium carboxymethyl cellulose, sodium alginate, guar gum and xanthan gum; the natural plant material capable of emitting fragrance comprises powder and/or fiber natural plant material.
As a specific embodiment, the water dispersible surface layer 1 and/or the water dispersible bottom layer 4 are made of fiber materials through wet forming; the fibrous material comprises hydrophobic cellulosic fibers; the hydrophobic cellulosic fibers include cotton fibers and/or kapok fibers that have been refined and not degreased.
As a specific embodiment, the thickness of the dry plant sheet is less than or equal to 1.5mm, and the size of each side is greater than or equal to 2mm.
A preparation method of the flushable sanitary towel or the panty liner comprises the following steps:
s1: preparing a water-dispersed liquid-separating layer 3;
s2: the water dispersible bottom layer 4, the water dispersible liquid separation layer 3 and the water dispersible absorption layer 2 are sequentially overlapped from bottom to top; wherein the water dispersible bottom layer 4 and the water dispersible liquid separation layer 3 are fixed by water soluble adhesive;
s3: and (3) overlapping the water dispersion surface layer 1 on the water dispersion absorption layer 2, pressing along the edge of the water dispersion surface layer 1 to connect the water dispersion surface layer 1 with the periphery of the water dispersion bottom layer 4, and coating and fixing the water dispersion absorption layer 2 and the water dispersion liquid separation layer 3 to obtain the flushable sanitary towel or pad.
As a specific embodiment, step S1 specifically includes the following steps: after stacking and forming the dry plant sheets, fumigating the dry plant sheets to stretch and soften the dry plant sheets, rolling the dry plant sheets into thin sheets, drying the thin sheets, and adhering the thin sheets to the water dispersion lining gasket layer 302 to obtain the water dispersion liquid separation layer.
As a specific embodiment, step S1 specifically includes the following steps: after the dry plant sheets are stacked and formed, the dry plant sheets are fumigated to be stretched and softened, then are overlapped and fixed with the water dispersion lining pad layer 302, and then are rolled to form a thin sheet, and the thin sheet is dried to obtain the water dispersion liquid separation layer.
As a specific embodiment, step S1 specifically includes the following steps: uniformly dispersing dry plant sheets in liquid, and forming by a wet method to prepare wet natural plant sheets; the wet natural plant sheet is dehydrated, rolled and dried, and then bonded to the water-dispersible liner sheet layer 302 to obtain a water-dispersible barrier layer.
Example 1
A flushable sanitary towel containing natural folium Artemisiae Argyi is composed of a water dispersible surface layer 1, a water dispersible absorbent layer 2, a water dispersible spacer layer 3 and a water dispersible bottom layer 4 from top to bottom, wherein the water dispersible spacer layer 3 and the water dispersible bottom layer 4 are bonded by water soluble polyvinyl alcohol (PVA) adhesive. The periphery of the water dispersion surface layer 1 extends downwards to be attached to the upper surface of the water dispersion bottom layer 4, and the peripheries of the water dispersion absorption layer 2 and the water dispersion separation layer 3 are covered and fixed by the water dispersion surface layer 1 and the water dispersion bottom layer 4. As shown in figures 1 and 2, a water-dispersing surface layer 1 above the edge of the water-dispersing absorption layer 2 is provided with a closed annular concave water-repellent coating strip 101 with the width of 2mm. The thickness of the aqueous dispersion barrier layer 3 was 3mm.
As shown in fig. 1 and 10, the water-dispersible liquid-separating layer 3 is composed of a natural plant sheet 301, and a water-dispersible liner sheet layer 302 provided below the natural plant sheet 301. The upper surface of the natural plant sheet layer 301 is provided with a groove 303 matched with the water dispersion absorption layer 2, and the water dispersion absorption layer 2 is embedded in the groove 303. The natural plant sheet layer 301 is formed by stacking dry-state Ai Shepian (the surface of dry-state Ai Shepian has rich short villi and small concave points, the rough structure can form a hydrophobic interface to prevent liquid from wetting, and meanwhile, the folium artemisiae argyi is a Chinese herbal medicine and has the effects of relieving pain and removing dampness and warming channels). The water-dispersed gasket layer 302 is a wet-laid spunlace nonwoven fabric.
The water dispersible surface layer 1 is made of viscose fiber and cotton fiber which are subjected to refining treatment and are not degreased in a mass ratio of 4:1 through wet forming. The water dispersible bottom layer 4 is made of viscose fiber and softwood pulp fiber in a mass ratio of 4:1 through wet forming. The water dispersible absorption layer 2 is composed of fluff pulp fiber and high polymer water absorption resin with the mass ratio of 4:1.
The sanitary towel containing the natural moxa leaves and capable of being dispersed is prepared through the following steps:
s1: cleaning the dry state Ai Shepian, and screening out dry state Ai Shepian with the thickness of less than or equal to 1.5mm and the size of each side of more than or equal to 2 mm;
s2: stacking cleaned and screened dry Ai Shepian for forming, fumigating to enable the dry Ai Shepian to be stretched and softened, then laminating the dry Ai Shepian with a water-soluble polyvinyl alcohol (PVA) coating to be bonded and fixed, then performing local rolling to form a thin sheet with a groove 303, and drying to obtain a water-dispersible liquid-separating layer 3;
s3: mixing the fluff pulp with the high-molecular water-absorbent resin, and performing air-laying and cutting to obtain a water-dispersible absorption layer 2;
s4: uniformly mixing fiber materials in proportion, and respectively preparing a water-dispersible surface layer 1 and a water-dispersible bottom layer 4 by web formation, spunlace, drying and cutting;
s5: the water-dispersed absorbent layer 2 is inserted into the groove 303 of the water-dispersed liquid-separating layer 3;
s6: applying a water-soluble polyvinyl alcohol adhesive to the upper surface of the water-dispersed bottom layer 4, and then laminating the water-dispersed barrier layer 3 on the water-dispersed bottom layer 4;
s7: the water dispersion surface layer 1 is stacked on the water dispersion absorption layer 2, and is pressed along the edge of the water dispersion surface layer 1, so that the water dispersion surface layer 1 is connected with the periphery of the water dispersion bottom layer 4, and the water dispersion absorption layer 2 and the water dispersion liquid separation layer 3 are coated and fixed;
s8: and rolling an inward concave water-repellent coating strip 101 with the width of 2mm on the water-dispersible surface layer 1 corresponding to the edge of the water-dispersible absorption layer 2 to obtain the flushable sanitary towel containing the natural moxa leaves.
Example 2
A flushable sanitary napkin containing natural rose petals is shown in figure 3, and comprises a water dispersion surface layer 1, a water dispersion absorption layer 2, a water dispersion liquid-separation layer 3 and a water dispersion bottom layer 4 from top to bottom, wherein the water dispersion liquid-separation layer 3 and the water dispersion bottom layer 4 are bonded by a sodium carboxymethylcellulose adhesive. The periphery of the water dispersion surface layer 1 extends downwards to be attached to the upper surface of the water dispersion bottom layer 4, and the peripheries of the water dispersion absorption layer 2 and the water dispersion separation layer 3 are covered and fixed by the water dispersion surface layer 1 and the water dispersion bottom layer 4. As shown in FIGS. 3 and 4, two water-repellent coating strips 101 each having a width of 1mm are provided on the water-dispersible face layer 1 above both side edges of the water-dispersible absorbent layer 2. The thickness of the aqueous dispersion liquid-separating layer 3 was 2mm.
As shown in fig. 3 and 11, the water-dispersible liquid-separating layer 3 is composed of a natural plant sheet 301, and a water-dispersible liner sheet layer 302 provided under the natural plant sheet 301. The natural plant sheet layer 301 is a plane, and the water dispersion lining pad layer 302 is tiled and laminated with the natural plant sheet layer 301. The natural plant sheet layer 301 is formed by stacking dry rose petals (the surface of the dry rose petals has periodic micron-sized mastoid and nano-sized wrinkles on the mastoid, and a micro-nano-sized composite structure shows better super-hydrophobic performance and the capacity of locking liquid, effectively prevents liquid leakage, and blocks the wetting and diffusion of the liquid. The water-dispersible backing sheet layer 302 is a water-soluble nonwoven fabric. As shown in fig. 3, the periphery of the water dispersible absorbent layer 2 is provided with a hydrophobic region 201; the hydrophobic region 201 is composed of non-degreased cotton fibers, and its area accounts for 10% of the area of the water-dispersible absorbent layer 2.
The water dispersible surface layer 1 is prepared by wet forming of viscose fiber and defibrinated kapok fiber which are subjected to refining treatment and are not degreased in a mass ratio of 4:1. The water dispersible bottom layer 4 is made of viscose fiber and softwood pulp fiber in a mass ratio of 3:2 through wet forming. The water dispersion absorption layer 2 except the hydrophobic region 201 is composed of fluff pulp fiber, ultrashort tencel fiber, high molecular water-absorbent resin, green tea powder and rose powder, wherein the length of the ultrashort tencel fiber is 3mm, the mass ratio of the high molecular water-absorbent resin is 25%, and the total mass ratio of the green tea powder and the rose powder is 5%.
The preparation method comprises the following steps of:
s1: cleaning the dry rose petals, and screening out the dry rose petals with the thickness of less than or equal to 1.5mm and the size of each side of more than or equal to 2 mm;
s2: dispersing cleaned and screened dry rose petals in water, and then forming suspended petals into a wet natural plant sheet layer by a wet method; dehydrating, rolling and drying the wet natural plant sheet layer, bonding and fixing the sheet layer with the water dispersion lining gasket layer 302, and cutting the sheet layer to form a water dispersion liquid separation layer;
s3: preparing a hydrophobic area sheet from non-degreased cotton fibers through air laying; mixing fluff pulp, ultrashort tencel fiber, high-molecular water-absorbent resin, green tea powder and rose powder, and then performing air-laid and cutting to prepare an absorption area sheet; placing the hydrophobic area sheet on the peripheral edge of the absorbent area sheet, and cutting to obtain a water-dispersible absorbent layer 2;
s4: uniformly mixing fiber materials in proportion, and respectively preparing a water dispersible surface layer 1 and a water dispersible bottom layer 4 by web formation, spunlace, drying and cutting;
s5: applying a sodium carboxymethylcellulose binder to the upper surface of the water-dispersed bottom layer 4, and laminating the water-dispersed barrier layer 3 on the water-dispersed bottom layer 4; and the water-dispersed absorbent layer 2 is laminated on the water-dispersed liquid-separating layer 3;
s6: the water dispersion surface layer 1 is stacked on the water dispersion absorption layer 2, and is pressed along the edge of the water dispersion surface layer 1, so that the water dispersion surface layer 1 is connected with the periphery of the water dispersion bottom layer 4, and the water dispersion absorption layer 2 and the water dispersion liquid separation layer 3 are coated and fixed;
s7: two water-repellent coating strips 101 with the width of 1mm are rolled on the water-dispersible surface layer 1 corresponding to the edges of the two sides of the water-dispersible absorption layer 2, so as to obtain the flushable sanitary towel containing natural rose petals.
Example 3
A flushable sanitary napkin containing natural chrysanthemum petals is composed of a water dispersion surface layer 1, a diversion layer 5, a water dispersion absorption layer 2, a water dispersion liquid separation layer 3 and a water dispersion bottom layer 4 from top to bottom in sequence, wherein the water dispersion liquid separation layer 3 and the water dispersion bottom layer 4 are bonded through a water-soluble polyvinyl alcohol (PVA) adhesive. The periphery of the water dispersion surface layer 1 extends downwards to be attached to the upper surface of the water dispersion bottom layer 4, and the peripheries of the diversion layer 5, the water dispersion absorption layer 2 and the water dispersion separation layer 3 are fixedly coated by the water dispersion surface layer 1 and the water dispersion bottom layer 4. As shown in figures 5 and 2, a concave water-repellent coating strip 101 with a width of 2mm is arranged on the water-dispersible surface layer 1 above the edge of the water-dispersible absorption layer 2. The thickness of the aqueous dispersion barrier layer 3 was 3mm.
As shown in fig. 5 and 10, the water dispersible barrier layer 3 is composed of a natural plant sheet 301, and a water dispersible liner sheet layer 302 provided under the natural plant sheet 301. The upper surface of the natural plant sheet layer 301 is provided with a groove 303 matched with the water dispersion absorption layer 2, and the water dispersion absorption layer 2 is embedded in the groove 303. The natural plant sheet layer 301 is formed by stacking dry chrysanthemum petals, and the water dispersion lining gasket layer 302 is wet-method spunlace non-woven fabric.
The water dispersible surface layer 1 and the water dispersible bottom layer 4 are both ultra-short fiber materials. The water dispersible surface layer 1 is prepared from softwood pulp fibers, viscose fibers and cotton fibers which are subjected to refining treatment and are not degreased in a mass ratio of 1. The water dispersible bottom layer 4 is made of viscose fiber and softwood pulp fiber in a mass ratio of 1:1 through wet forming. The water dispersion absorption layer 2 is composed of fluff pulp fibers, cotton linters and high polymer water-absorbent resin in a mass ratio of 3. The flow guide layer 5 is a polylactic acid fiber non-woven fabric, wherein the length of the polylactic acid fiber is 6mm.
The flushable sanitary towel containing the natural chrysanthemum petals is prepared by the following steps:
s1: cleaning the dry chrysanthemum petals, and screening the dry chrysanthemum petals with the thickness of less than or equal to 1.5mm and the sizes of all sides of more than or equal to 2 mm;
s2: stacking and forming the cleaned and screened dry chrysanthemum petals, fumigating the chrysanthemum petals to enable the chrysanthemum petals to be stretched and softened, then laminating the chrysanthemum petals with a water-dispersible lining gasket layer 302 coated with a water-soluble polyvinyl alcohol (PVA) coating, bonding and fixing the chrysanthemum petals, then locally rolling the chrysanthemum petals to form a thin sheet with a groove 303, and drying the thin sheet to obtain a water-dispersible liquid-separating layer 3;
s3: mixing the fluff pulp with the high-molecular water-absorbent resin, and performing air-laying and cutting to obtain a water-dispersible absorption layer 2;
s4: uniformly mixing fiber materials in proportion, and respectively preparing a water-dispersible surface layer 1 and a water-dispersible bottom layer 4 by web formation, spunlace, drying and cutting;
s5: preparing a flow guide layer 5 from polylactic acid fibers through opening, air-laying, spunlacing, drying and cutting;
s6: the water-dispersed absorbent layer 2 is inserted into the groove 303 of the water-dispersed liquid-separating layer 3;
s6: applying a water-soluble polyvinyl alcohol adhesive to the upper surface of the water-dispersed bottom layer 4, and superposing the water-dispersed liquid-separating layer 3 on the water-dispersed bottom layer 4; then, the diversion layer 5 is overlapped on the water dispersion absorption layer 2 and is bonded and fixed;
s7: the water dispersion surface layer 1 is stacked on the flow guide layer 5 and is pressed along the edge of the water dispersion surface layer 1, so that the water dispersion surface layer 1 is connected with the periphery of the water dispersion bottom layer 4, and the flow guide layer 5, the water dispersion absorption layer 2 and the water dispersion liquid separation layer 3 are coated and fixed;
s8: rolling an inward concave water-repellent coating strip 101 with the width of 2mm on the water-dispersible surface layer 1 corresponding to the edge of the water-dispersible absorption layer 2 to obtain the flushable sanitary towel containing natural chrysanthemum petals.
Example 4
A flushable pad containing natural herba Sidae Rhombifoliae and herba Leonuri comprises water dispersible surface layer 1, water dispersible absorption layer 2, water dispersible spacer layer 3 and water dispersible bottom layer 4 from top to bottom, wherein the water dispersible spacer layer 3 and the water dispersible bottom layer 4 are bonded by sodium alginate adhesive. The periphery of the water dispersion surface layer 1 extends downwards to be attached to the upper surface of the water dispersion bottom layer 4, and the peripheries of the water dispersion absorption layer 2 and the water dispersion separation layer 3 are covered and fixed by the water dispersion surface layer 1 and the water dispersion bottom layer 4. As shown in FIGS. 6 and 7, a concave water-repellent coating strip 101 with a width of 2mm is provided on the water-dispersible face layer 1 above the edge of the water-dispersible absorbent layer 2. The thickness of the aqueous dispersion barrier layer 3 was 1mm.
As shown in fig. 6 and 11, the water-dispersible liquid-barrier layer 3 includes a natural plant sheet 301, and a water-dispersible liner sheet layer 302 provided under the natural plant sheet 301. The natural plant sheet layer 301 is a plane, and the water dispersible liner layer 302 and the natural plant sheet layer 301 are laid and laminated. The natural plant sheet layer 301 is formed by stacking dry calendula and dry leonurus japonicus sheet. The water-dispersible backing sheet layer 302 is a water-soluble nonwoven fabric.
The water dispersible surface layer 1 is prepared by wet forming of viscose fiber and defibrinated kapok fiber which are subjected to refining treatment and are not degreased in a mass ratio of 9:1. The water dispersible bottom layer 4 is made of viscose fiber and softwood pulp fiber in a mass ratio of 3:2 through wet forming. The water dispersion absorption layer 2 is an ultrathin absorption core body with the thickness of 2mm and is composed of fluff pulp fibers, ultrashort bamboo fibers, high-molecular water-absorbent resin and rose powder, wherein the length of the ultrashort bamboo fibers is 4mm, and the mass ratio of the high-molecular water-absorbent resin is 20%.
The dispersible pad containing the natural calendula and the motherwort is prepared by the following steps:
s1: cleaning dry calendula and dry leonurus tablets, and screening the dry calendula and the dry leonurus tablets with the thickness of less than or equal to 1.5mm and the size of each side of more than or equal to 2 mm;
s2: dispersing cleaned and screened dry calendula and dry leonurus tablets in water, and then forming suspended petals into wet natural plant tablets by a wet method; dehydrating, rolling and drying the wet natural plant sheet layer, bonding and fixing the sheet layer with the water dispersion lining gasket layer 302, and cutting the sheet layer to form a water dispersion liquid separation layer;
s3: mixing fluff pulp, ultrashort bamboo fiber, high-molecular water-absorbent resin and rose powder, performing air-laid and pressing to prepare an ultrathin core with the thickness of 2mm, and cutting the ultrathin core into a water-dispersible absorption layer 2;
s4: uniformly mixing fiber materials in proportion, and respectively preparing a water-dispersible surface layer 1 and a water-dispersible bottom layer 4 by web formation, spunlace, drying and cutting;
s5: applying a sodium alginate adhesive to the upper surface of the water-dispersible bottom layer 4, and superposing the water-dispersible barrier layer 3 on the water-dispersible bottom layer 4; then the water-dispersible absorbent layer 2 is superposed on the water-dispersible liquid-separating layer 3;
s6: the water dispersion surface layer 1 is stacked on the water dispersion absorption layer 2, and is pressed along the edge of the water dispersion surface layer 1, so that the water dispersion surface layer 1 is connected with the periphery of the water dispersion bottom layer 4, and the water dispersion absorption layer 2 and the water dispersion liquid separation layer 3 are coated and fixed;
s7: and rolling a concave water-repellent coating strip 101 with the width of 2mm on the water-dispersible surface layer 1 corresponding to the edge of the water-dispersible absorption layer 2 to obtain the flushable pad containing natural calendula and motherwort.
Example 5
A flushable sanitary napkin containing natural moxa leaves, as shown in figures 1, 2 and 10, only differs from example 1 in that: the water-dispersible backing sheet layer 302 is a water-soluble PVA film.
Example 6
A flushable sanitary napkin containing natural mugwort leaves, as shown in fig. 8, 9 and 10, which only differs from example 1 in that: the water-dispersing surface layer 1 is not provided with the water-repellent coating strips 101.
Example 7
A flushable sanitary napkin containing natural mugwort leafs, which is different from example 1 only in that: the natural plant sheet layer 301 is a plane without the groove 303, and the water dispersion lining spacer layer 302 and the natural plant sheet layer 301 are laid and laminated.
Example 8
A flushable sanitary napkin comprising natural rose petals that differs from example 2 only in that: the water dispersible absorbent layer 2 is not provided with the hydrophobic region 201 at the periphery.
Comparative example 1
A sanitary napkin, differing from example 1 only in that: the aqueous dispersion liquid-separating layer 3 is a polyethylene film.
Comparative example 2
A flushable sanitary napkin which differs from example 1 only in that: the aqueous dispersion liquid-separating layer 3 is not included.
Comparative example 3
A flushable sanitary napkin which differs from example 1 only in that: the non-absorbent cotton fibers used in the water-dispersible top sheet 1 were not disc-milled.
Comparative example 4
A flushable sanitary napkin which differs from example 2 only in that: the non-degreased kapok fiber used in the water dispersible top layer 1 is not disc-milled.
Test example
The sanitary napkins or pads of examples 1-8 and comparative examples 1-2 were tested for leakage resistance, flushability, side leakage resistance, and top absorbency.
The test method of the above properties is as follows:
(1) Anti-leakage performance:
with mass m 1 The absorption pad is placed on the horizontal table top; placing sanitary towel and pad test samples on an absorption pad; applying 15mL of simulated blood to the middle part of the surface layer of the sanitary towel for three times, wherein 5mL of simulated blood is applied each time, and the interval between the two applications is 5min; waiting for 5min after the simulated blood application is finished, taking away the sanitary towel test sample above the absorption pad, weighing the absorption pad, and recording the weight as m 2 (ii) a Leakage m = m 2 -m 1 The anti-leakage performance of the sanitary towel and the panty liner is represented by the value of m, wherein the condition that the value of m is more than 0 indicates that leakage occurs.
(2) Flushability:
the test was carried out by referring to the shaking box decomposition test of GB/T40181-2021 method for testing flushability of disposable sanitary nonwoven materials and evaluation, and the decomposition percentage of the sample was recorded.
(3) The stability of the attaching structure:
placing an absorption pad with the thickness of 400mm multiplied by 400mm on an inclined plane which forms an included angle of 10 degrees with the horizontal plane; placing a sanitary towel test sample above the geometric center of the absorption pad, wherein the length direction of the test sample is parallel to the horizontal plane; accurately taking 10mL of simulated blood by using a pipette, and enabling liquid to freely flow onto the surface of the sample at the position where the vertical distance from the central point of the mouth of the pipette to the central point of the surface of the sample is 5-10 mm; waiting for 5min after the simulated blood is applied, taking down the test sample, checking the damage condition of the test solution to the joint structure between the water dispersion surface layer and the water dispersion bottom layer in the test sample, measuring the damaged (failed) length of the joint structure, and recording as L, wherein the damaged failure of the joint structure is represented when the value of L is greater than 0.
(4) Testing the absorbency of the surface layer:
and taking the surface layer of the sanitary towel to perform a test according to the test of GB/T30133-2013 annex A penetration amount, and recording the penetration amount of the sample.
TABLE 1
By analyzing the data in the above table, it can be seen that:
(1) The anti-leakage performance of the embodiment 1 is obviously superior to that of the comparative example 2, and the flushability performance is equivalent to that of the comparative example 2; the flushability performance of example 1 is obviously better than that of comparative example 1, and the anti-leakage performance is equivalent to that of comparative example 1. The water-dispersible liquid-separating layer formed by stacking the dry plant sheets can achieve the anti-leakage effect equivalent to that of a polyethylene film, and cannot cause excessive influence on the flushability of the sanitary towel. The reason is that: the rough structure and the surface wax of the dry plant sheet material surface can endow the sheet material with better hydrophobicity, the surface of some dry plant sheet materials also has graded micron and nanometer structures which can lock liquid, thereby playing a role of leakage prevention, and after stacking and rolling, the gaps between the dry plant sheet materials are extruded to be very small, so that the whole water dispersion liquid-separation layer has excellent leakage prevention performance; meanwhile, as the plant sheets are not adhered and tangled, when the sanitary towel is thrown into water, the surface layer and the bottom layer wrapping the plant sheets are disintegrated in the water, and the plant sheets are not bound, so that the fragmentations can be dispersed in the water.
(2) The sanitary napkin of example 1 had better flushability than comparative example 3. The reason is that: the non-absorbent cotton fiber in the comparative example 3 is not disc-milled, and the fiber is seriously entangled in the dispersed slurry, so that the evenness of the surface layer is extremely poor, and the flushability is reduced because the surface layer fiber is unevenly distributed and the entanglement degree of different positions of the material is different after the material is subjected to spunlace reinforcement; in the embodiment 1, the natural twist of the cotton fibers can be eliminated by carrying out disc grinding treatment on the cotton fibers, so that the surface layer materials are uniform and uniform, the entanglement is uniform, and the flushability is improved.
(3) The sanitary napkin of example 2 had better flushability and the facing material had better absorbency than comparative example 4. The reason is that: in comparative example 4, kapok fiber without disc grinding treatment is used as the surface layer, the surface layer has a hollow structure, the density is far lower than that of water, the kapok fiber is easy to float in the wet forming process and finally gathers on one surface of the surface layer material, so that the surface of the surface layer material is in a hydrophobic state after being subjected to spunlace reinforcement, and the flushability and the absorption performance of the surface layer material are reduced; and embodiment 2 is through carrying out the disc mill to kapok fibre and handling, can destroy its hollow structure to guarantee that the surface course material is even unanimous.
(4) Compared with example 6, examples 1 and 2 have better stability of the attaching structure. The test sample of example 6, in which the flap-side attachment structure was broken by the test fluid under oblique test conditions, but examples 1 and 2 were not broken, demonstrates that the water repellent coating strip on the water-dispersible facing layer provides better structural stability of the sanitary napkin during use. The reason is that: during the test, the phenomena of the penetration of the test liquid into the material and the flowing of the test liquid on the surface of the material exist simultaneously. For the surface layer of the embodiment 1 and the embodiment 2, a polar region composed of common cellulose fibers and a non-polar region formed by a water-repellent coating strip exist, and the test liquid is composed of polar substances and can wet the polar region more easily, so the water-repellent coating strip can effectively prevent the test liquid from flowing along the lateral direction to enable the core body to absorb the test liquid, and further prevent the test liquid from permeating into the joint structure between the surface layer and the bottom layer to protect the joint structure.
(5) Compared with examples 7 and 8, examples 1 and 2 have better stability of the bonding structure. Examples 7 and 8, in which the flap-side attachment structure was broken by the test solution under the oblique test conditions, while examples 1 and 2 were not broken, show that the sanitary napkin could have better structural stability during use by embedding the water-dispersible absorbent layer in the grooves of the natural plant sheet or by providing hydrophobic regions at the peripheral edge of the water-dispersible absorbent layer. The reason is that: at the edge of the water dispersion absorption layer, the test solution easily and quickly permeates into the joint structure between the water dispersion surface layer and the water dispersion bottom layer to cause the joint structure to be damaged, and the water dispersion absorption layer is embedded in the groove on the natural plant sheet layer, or a hydrophobic area is arranged on the periphery of the water dispersion absorption layer, so that the test solution can be prevented from diffusing to the joint structure from the edge of the water dispersion absorption layer, and the joint structure is protected.
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modifications, alterations and equivalent changes made to the above embodiment according to the technical spirit of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (10)
1. A flushable sanitary towel or pad containing natural plant materials is characterized by comprising a water-dispersible absorption layer (2) and a water-dispersible liquid-separating layer (3) which are overlapped up and down; the water-dispersible liquid-separating layer (3) comprises a natural plant sheet layer (301); the natural plant sheet layer (301) is formed by stacking dry plant sheets; the dry plant sheet comprises dry plant petals and/or dry plant leaves.
2. A flushable sanitary napkin or pad as claimed in claim 1 wherein said dry plant sheet material has a non-smooth surface with a hydrophobic material; the hydrophobic substance is one or more of epidermal wax, epidermal hair and epidermal powder.
3. A flushable sanitary napkin or a panty liner according to claim 1 wherein the water-dispersible liquid-barrier layer (3) further comprises a water-dispersible liner sheet layer (302) provided below the natural plant sheet layer (301); the preparation method of the aqueous dispersion liquid-separating layer (3) comprises the following steps:
scheme A: stacking and forming dry plant sheets, fumigating the dry plant sheets to stretch and soften the dry plant sheets, rolling the dry plant sheets into thin sheets, drying the thin sheets, and adhering the thin sheets to a water dispersion lining gasket layer (302) to obtain a water dispersion liquid separation layer;
scheme B: stacking and forming dry plant sheets, fumigating the dry plant sheets to stretch and soften the dry plant sheets, then superposing and fixing the dry plant sheets with a water dispersion lining gasket layer (302), rolling the dry plant sheets into thin sheets, and drying the thin sheets to obtain a water dispersion liquid separation layer;
scheme C: uniformly dispersing the dry plant sheets in liquid, and preparing wet natural plant sheets by wet forming; and (3) dehydrating, rolling and drying the wet natural plant sheet layer, and then adhering the sheet layer to a water-dispersible lining gasket layer (302) to obtain a water-dispersible liquid-separating layer.
4. A flushable sanitary napkin or pad as claimed in any one of claims 1~3 wherein a water-dispersible facing layer (1) is provided over said water-dispersible absorbent layer (2); a water dispersion bottom layer (4) is arranged below the water dispersion liquid separation layer (3).
5. A flushable sanitary napkin or a panty liner as claimed in claim 4, wherein the water-dispersible surface layer (1) is attached to the upper surface of the water-dispersible bottom layer (4) with its periphery extending downward, and the water-dispersible absorbent layer (2) and the water-dispersible liquid-separating layer (3) are fixed by the water-dispersible surface layer (1) and the water-dispersible bottom layer (4) with their peripheries covered.
6. A flushable sanitary napkin or pad as claimed in claim 5, wherein the upper surface of the natural plant sheet (301) is provided with a recess (303) adapted to the water-dispersible absorbent layer (2); the water dispersion absorption layer (2) is embedded in the groove (303).
7. A flushable sanitary napkin or a panty liner according to claim 5 wherein the water-dispersible absorbent layer (2) is provided with hydrophobic areas (201) along its periphery.
8. A flushable sanitary napkin or pad as claimed in claim 5, wherein the water-dispersible facing layer (1) above the edges of the water-dispersible absorbent layer (2) is provided with strips (101) of a water-repellent coating.
9. A flushable sanitary napkin or pad as claimed in claim 4, wherein the water-dispersible topsheet (1) and/or the water-dispersible backsheet (4) is made of fibrous material by wet forming; the fibrous material comprises hydrophobic cellulosic fibers; the hydrophobic cellulose fibers include cotton fibers and/or kapok fibers that have been refined and not degreased.
10. A method of making a flushable sanitary napkin or pad according to any one of claims 4~9 comprising the steps of:
s1: the water dispersion bottom layer (4), the water dispersion liquid separation layer (3) and the water dispersion absorption layer (2) are overlapped from bottom to top in sequence; wherein the water dispersion bottom layer (4) and the water dispersion liquid separation layer (3) are bonded and fixed by a water-soluble adhesive;
s2: and (3) overlapping the water dispersion surface layer (1) on the water dispersion absorption layer (2), pressing along the edge of the water dispersion surface layer (1) to connect the water dispersion surface layer (1) with the periphery of the water dispersion bottom layer (4), and coating and fixing the water dispersion absorption layer (2) and the water dispersion liquid separation layer (3) to obtain the flushable sanitary towel or pad.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211013115.5A CN115715722A (en) | 2022-08-23 | 2022-08-23 | A sanitary napkin or pad containing natural plant material and its preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211013115.5A CN115715722A (en) | 2022-08-23 | 2022-08-23 | A sanitary napkin or pad containing natural plant material and its preparation method |
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| CN115715722A true CN115715722A (en) | 2023-02-28 |
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| CN202211013115.5A Pending CN115715722A (en) | 2022-08-23 | 2022-08-23 | A sanitary napkin or pad containing natural plant material and its preparation method |
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| CN (1) | CN115715722A (en) |
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