A maintenance-type disposable absorbent product and preparation method thereof

Abstract

The present application relates to the field of sanitary products, and provides a maintenance type disposable absorbent product and a preparation method thereof, which solves the problems of the existing technology, such as the hard material, dry hand feeling and poor softness of the disposable absorbent product, and comprises a liquid permeable surface layer, a flow guide layer, an absorbent body and a liquid impermeable bottom layer which are sequentially stacked from top to bottom, the absorbent body is provided with one or more slits, the length of each slit is 4-50 mm, and the width is 0.2-3 mm, the surface of the liquid permeable surface layer is provided with a penetrating hole through the absorbent body, the surface of the liquid permeable surface layer is also provided with a flow guide groove which is pressed to the absorbent body, the liquid permeable surface layer, the flow guide layer and the absorbent body all contain cream, and the total content of the cream is 10-1000 mg / g.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sanitary products, in particular to a maintenance type disposable absorbent article and a preparation method thereof. BACKGROUND

[0002] Disposable absorbent articles are absorbent materials including sanitary napkins, baby diapers, adult incontinence products, and sweat pads, etc. The structure generally consists of four parts: a surface layer, a flow guide layer, an absorbent core layer, and a leakage-proof bottom layer, which are bonded together by hot melt adhesive. The surface layer of existing absorbent articles generally uses cellulose fiber non-woven fabric or chemical synthetic fiber non-woven fabric. Due to the limitation of material quality, the surface layer prepared by the above type of non-woven fabric has poor overall softness when matched with various absorbents, so it has the pain points of dry and hard hand feeling and strong friction feeling.

[0003] Chinese patent application No. 202023250865.3 discloses a composite fabric and a sanitary product. The composite fabric includes a water-repellent composite surface layer and a flow guide layer that are combined together. The water-repellent composite surface layer is provided with a plurality of mesh holes, and the flow guide layer covers the mesh holes of the water-repellent composite surface layer. The water-repellent composite surface layer includes a water-repellent surface layer and a structural layer. The water-repellent surface layer is a spunlace non-woven fabric, and the structural layer is a hot melt non-woven fabric. The flow guide layer is a hydrophilic thermal non-woven fabric. The composite fabric can make liquid quickly pass through the water-repellent composite surface layer through the plurality of mesh holes and be quickly absorbed by the flow guide layer, so that the absorbed liquid quickly spreads through the flow guide layer, improving the liquid absorption speed of the entire composite fabric. At the same time, the flow guide layer covers the plurality of mesh holes of the water-repellent composite surface layer, which can avoid the occurrence of glue leakage on the surface of the water-repellent composite layer. In addition, the strength of the water-repellent composite surface layer is also greater than that of ordinary spunlace non-woven fabric, so that the mesh holes can be made by punching process, making the mesh hole edges clearer and the liquid more easily penetrate the water-repellent composite surface layer, thereby improving the liquid absorption speed of the composite fabric. However, the composite fabric has the problems of dry and hard hand feeling and strong friction feeling when in contact with the skin during use. SUMMARY

[0004] Therefore, in view of the above problems, the present application provides a maintenance type disposable absorbent article and a preparation method thereof, which solves the problems of hard material quality, dry and hard hand feeling, and poor softness of the disposable absorbent article produced by the prior art.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A maintenance type disposable absorbent product, comprising a liquid permeable surface layer, a flow guide layer, an absorbent body and a liquid impermeable bottom layer which are sequentially stacked from top to bottom, wherein the absorbent body is provided with one or more slits, each slit has a length of 4-50 mm and a width of 0.2-3 mm, the surface of the liquid permeable surface layer is provided with penetration holes penetrating through the absorbent body, the surface of the liquid permeable surface layer is also provided with flow guide grooves pressed onto the absorbent body, the liquid permeable surface layer, the flow guide layer and the absorbent body all contain cream, and the total content of the cream is 10-1000 mg / g.

[0007] Further, the penetration hole is funnel-shaped, and the maximum diameter of the penetration hole is 0.5-2.5 mm.

[0008] Further, the depth of the flow guide groove is 0.3-0.7 mm, and the shape of the flow guide groove is a straight strip.

[0009] Further, the amount of cream used in the liquid permeable surface layer is more than 20% of the total amount of cream, the content of cream in the flow guide layer is ≥0.5 mg / g, and the content of cream in the absorbent body is ≥1 mg / g.

[0010] Further, the area of the cream distributed on the liquid permeable surface layer is ≥10000 mm 2 , and the area of the cream distributed in the flow guide layer and the absorbent body is ≥1000 mm 2 .

[0011] Further, the liquid permeable surface layer is any one of hot air non-woven fabric, spunlace non-woven fabric, spun-bond non-woven fabric, and hot-rolled non-woven fabric.

[0012] Further, the liquid permeable surface layer is pure cotton non-woven fabric.

[0013] Further, the fiber raw material of the pure cotton non-woven fabric is composed of long cotton and fine cotton, and the weight percentage of the long cotton is ≥2%.

[0014] Further, the absorbent body is sequentially stacked by a first long absorbent body, a convex absorbent body, a wrapping layer and a second long absorbent body, the convex absorbent body is mixed by fluff pulp and high molecular absorbent resin, the wrapping layer is e-shaped folded to wrap the convex absorbent body, and the material of the wrapping layer is the same as that of the convex absorbent body.

[0015] Further, the first long absorbent body and the second long absorbent body are any one of hydrophilic non-woven fabric, water absorption paper, dust-free paper and toilet paper.

[0016] A preparation method of a maintenance type disposable absorbent product, comprising the following steps:

[0017] (1) Preparing a liquid permeable surface layer: applying cream on the surface layer non-woven fabric;

[0018] (2) preparing the absorbent: the absorbent is prepared off-line or on-line, the prepared absorbent is transmitted, and a vertical cut is made on the surface of the absorbent to form one or more slits, the length of the slit is 4-50 mm, and the width is 0.2-3 mm;

[0019] (3) on-line compounding the liquid-permeable surface layer prepared in step (1), the flow guide layer, and the absorbent prepared in step (2), and then performing puncturing in the pressure zone between the puncture roller and the bottom roller to form penetration holes penetrating through the absorbent from the liquid-permeable surface layer, thereby obtaining a semi-finished product;

[0020] (4) pressing the semi-finished product obtained in step (3) through the flow guide groove, the pressure during the pressing of the flow guide groove is 0.2-0.5 MPa, and the depth of the flow guide groove is 0.3-0.7 mm;

[0021] (5) on-line compounding the product obtained in step (4) with the liquid-impermeable bottom layer, and slitting.

[0022] Further, the cream is applied on the surface layer non-woven fabric by any one of dip coating, roll coating, blade coating, and spraying.

[0023] Further, the cream contains a water-soluble preparation of any one of triglyceride, glycerol, and propylene glycol, butylene glycol, hyaluronic acid, hydrolyzed collagen, squalane, trehalose, betaine, and natural extract, or a mixture of two or more of the components in any ratio, and the viscosity of the cream at room temperature is 10-500 mPa·s.

[0024] By adopting the foregoing technical solutions, the application has the following beneficial effects:

[0025] 1. The maintenance type disposable absorbent product of the application has penetration holes penetrating through the absorbent on the surface of the liquid-permeable surface layer, and the flow guide groove is pressed to the absorbent on the surface of the liquid-permeable surface layer, so that the cream applied on the liquid-permeable surface layer can penetrate into the flow guide layer and the absorbent through the penetration holes and the flow guide groove and the fine pores of the non-woven fabric of the liquid-permeable surface layer itself, the cream is a water-soluble substance, and dissolves immediately after contacting with liquid, without affecting the water absorption and permeability of the liquid-permeable surface layer.

[0026] 2. The maintenance type disposable absorbent product of the application contains the cream in the liquid-permeable surface layer, the flow guide layer, and the absorbent, and the softness of the product is greatly improved, the softness of the liquid-permeable surface layer is improved by more than 10%, and the softness of the front and rear hand washing areas of the product is ≦103 gf.

[0027] 3. During the preparation of the disposable absorbent product of the present invention, a cream is applied to the liquid-permeable surface layer. This surface layer comes into direct contact with human skin, providing a soft touch and excellent comfort. The absorbent layer is vertically cut to create slits, which accelerate liquid infiltration and facilitate the migration of the cream applied to the liquid-permeable surface layer into the absorbent body as it matures.

[0028] 4. Through the guide groove pressing process, the cream content at the guide groove pressing part is increased by more than 5% compared with the pressing part without the guide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of embodiment 1 of the present invention;

[0030] Figure 2 for Figure 1 Cross-sectional view of AA in the figure. DETAILED DESCRIPTION

[0031] Example 1

[0032] refer to Figures 1 to 2 A sanitary napkin comprising a liquid-permeable surface layer 1, a flow-guiding layer 2, an absorbent body 3, and a liquid-impermeable backing layer 4, stacked sequentially from top to bottom. The absorbent body 3 is provided with a plurality of slits 5, each 4-50 mm long and 0.2-3 mm wide. Specifically, in this embodiment, there are 20 slits 5, each 20 mm long and 2 mm wide. The surface of the liquid-permeable surface layer 1 is provided with permeable holes 11 penetrating through the absorbent body. The surface of the liquid-permeable surface layer 1 is also provided with flow-guiding grooves 12 pressed against the absorbent body 3. The liquid-permeable surface layer 1, the flow-guiding layer 2, and the absorbent body 3 all contain cream, with a total cream content of 500 mg / g. The amount of cream in the liquid-permeable surface layer is 25% of the total cream content. The amount of cream in the flow-guiding layer is 0.6 mg / g, and the amount of cream in the absorbent body is 2 mg / g.

[0033] After testing, the area of ​​cream distributed on the liquid permeable surface layer 1 is 10000mm 2 The distribution area of ​​the cream in the guide layer 2 and the absorbent body 3 is 1000mm 2 .

[0034] The permeable holes 11 are funnel-shaped, with a maximum diameter of 2.5 mm. Specifically, the permeable holes located on the liquid-permeable surface layer 1 have a diameter of 1 mm, and the permeable holes located on the bottom surface of the absorbent body 3 have a diameter of 2.5 mm. The guide grooves 12 are 0.5 mm deep and are straight strip-shaped.

[0035] The liquid permeable surface layer 1 is a pure cotton non-woven fabric made by a water jet process, the fiber raw material of the pure cotton non-woven fabric is composed of long cotton and fine cotton, and the weight percentage of the long cotton is 10%.

[0036] The absorbent body 3 is sequentially stacked by a first long absorbent body 31, a convex middle absorbent body 32, a wrapping layer 33 and a second long absorbent body 34, the convex middle absorbent body 32 is mixed by fluff pulp and high molecular absorbent resin, the wrapping layer 33 is e-shaped folded wrapping convex middle absorbent body, and the material of the wrapping layer 33 is the same as that of the convex middle absorbent body 32. The first long absorbent body 31 and the second long absorbent body 34 are water absorption paper.

[0037] The preparation method of the maintenance type disposable absorbent product includes the following steps:

[0038] (1) preparing a liquid permeable surface layer: rolling cream on a hydrophilic non-woven fabric, and then drying, which is prepared off-line and then transferred to the line;

[0039] (2) preparing an absorbent body: the absorbent body is prepared off-line, the prepared absorbent body is transmitted, and a vertical cut is made on the surface of the absorbent body to form one or more slits, the length of the slit is 20mm, and the width is 2mm;

[0040] (3) on-line compounding the liquid permeable surface layer prepared in step (1), the flow guide layer and the absorbent body prepared in step (2), and then performing hole punching in the pressure zone between the punching roller and the bottom roller to form penetration holes penetrating through the absorbent body from the liquid permeable surface layer, thereby obtaining a semi-finished product;

[0041] (4) pressing the semi-finished product obtained in step (3) through a flow guide groove, the pressure during the pressing of the flow guide groove is 0.3MPa, and the depth of the flow guide groove is 0.5mm;

[0042] (5) on-line compounding the product obtained in step (4) with a liquid impermeable bottom layer, slitting, spraying glue, and compounding release paper to obtain a maintenance type disposable absorbent product.

[0043] The cream is composed of the following weight parts of raw materials: triglyceride 20 parts by weight, glycerol 50 parts by weight, propylene glycol 20 parts by weight, butanediol 10 parts by weight, hyaluronic acid 5 parts by weight, hydrolyzed collagen 10 parts by weight, squalane 3 parts by weight, trehalose 5 parts by weight, betaine 2 parts by weight, natural extract of centella asiatica 2 parts, extract of sophora root 3 parts by weight, and deionized water 100 parts by weight, the viscosity of the cream at room temperature is 50mPa·s.

[0044] Example two

[0045] Compared with Example One, the cream used in this example is different from that of Example One, and other schemes are the same as those of Example One. The preparation steps of the cream used in this example are as follows:

[0046] (1) Selection of raw materials

[0047] The cream is composed of the following raw materials by weight: 5 parts by weight of glycerol, 5 parts by weight of humectant, 5 parts by weight of plant extract, 2 parts by weight of cocoyl antibacterial softener, 1 part by weight of betaine, 3 parts by weight of dipotassium glycyrrhizinate, 2 parts by weight of penetrant, 2 parts by weight of surfactant, 10 parts by weight of deionized water;

[0048] (2) Preparation of cocoyl antibacterial softener

[0049] a. According to the solid-liquid ratio of Na2HPO4 and deionized water of 1:25, Na2HPO4 is added to a three-necked flask containing deionized water, stirred until completely dissolved, the pH is adjusted to 6 with a 30% NaOH solution, the temperature is raised to 85°C, and stirred for 60 min, then according to the solid-liquid ratio of Na2HPO4 and epichlorohydrin of 1:1, epichlorohydrin is added dropwise, the temperature is raised to 85°C, and stirred under reflux for 3h until no oily droplets are present, obtaining a mixed liquid;

[0050] b. According to the volume ratio of cocoyl propyl dimethyl tertiary amine and isopropanol of 1:1, cocoyl propyl dimethyl tertiary amine is added to a three-necked flask containing isopropanol, the temperature is raised to 85°C, and after stirring until completely dissolved, the mixed liquid obtained in step a is added dropwise, and stirring is continued for 6h, obtaining a colorless transparent liquid;

[0051] c. According to the volume ratio of silicone softener 707-2 and the above colorless transparent liquid of 1:1, they are mixed uniformly, and glacial acetic acid is added to adjust the pH to 5, obtaining the cocoyl antibacterial softener;

[0052] (3) In the water phase pot of the homogenizing emulsifying kettle, add Sophora root extract, betaine, dipotassium glycyrrhizinate, and deionized water, and raise the temperature to 75°C, and stir to dissolve;

[0053] (4) In the oil phase pot of the homogenizing emulsifying kettle, add glycerol, tea seed oil, and squalane, heat to 75°C, and stir uniformly, then add cocoyl antibacterial softener, methanol, and sodium laureth sulfate in sequence, and stir to mix uniformly;

[0054] (5) Add the water phase liquid obtained in step (1-3) to the mixed liquid obtained in step (4), and then add agarose gel, stir to mix uniformly at 75°C, and vacuum homogenize at a speed of 2200r / min for 5min, obtaining the cream;

[0055] The cream formula is optimized and designed, one or more of propylene glycol, butanediol, hyaluronic acid, hydrolyzed collagen, squalane and trehalose is used as a moisturizing agent, which has good moisturizing effect, the coconut oil-based antibacterial softener is prepared as one of the cream raw materials, which has the advantages of low irritation and low toxicity, and has good hydrophilicity, softness, hand feeling and bacteriostatic rate, and is matched with the moisturizing agent, which can greatly improve the hand feeling of the surface layer of the absorbent product, and completely solve the pain points of dry and strong rubbing feeling of the surface layer. And the coconut oil-based antibacterial softener prepared is milky white, white has the meaning of neutrality, purity and peace in color psychology, which is different from colored antibacterial agents, and can bring people a kind of sanitary, safe and clean image in vision, which helps to improve the trust of consumers.

[0056] The extracts of Sophora flavescens root and Centella asiatica are used as functional ingredients, which have the effects of anti-inflammatory analgesia, bacterial inhibition, enhancement of skin barrier hydration and reduction of transepidermal water loss. Oleic acid can form a protective film on the skin surface to reduce the evaporation of water and effective substances. The chemical structure of betaine makes it easy to form intermolecular hydrogen bonds, van der Waals forces and hydrophobic interactions. On the one hand, betaine can form supramolecular structures with active substances such as glycerol, thereby increasing the solubility of some poorly soluble ingredients and stabilizing the structure. On the other hand, betaine can form supramolecular structures with plant extract complexes and encapsulate them, thereby achieving penetration and slow release. At the same time, the coconut oil-based antibacterial softener and betaine have good synergistic thickening effect. Dipotassium glycyrrhizinate has anti-inflammatory and antibacterial effects, which can reduce the probability of allergic reactions in sensitive skin and also reduce the viscosity of the aqueous phase.

[0057] Although the present application is specifically shown and described in connection with preferred embodiments, those skilled in the art will appreciate that various modifications in form and detail can be made without departing from the spirit and scope of the application as defined in the appended claims.

Claims

1. A maintenance-type disposable absorbent product comprising a liquid-permeable top layer, a flow-guiding layer, an absorbent body, and a liquid-impermeable bottom layer stacked in order from top to bottom, characterized in that: The absorbent body is provided with one or more slits, each of which is 4-50 mm long and 0.2-3 mm wide. The surface of the liquid-permeable surface layer is provided with permeation holes that penetrate the absorbent body. The surface of the liquid-permeable surface layer is also provided with a diversion groove pressed to the absorbent body. The liquid-permeable surface layer, the diversion layer and the absorbent body all contain cream, and the total content of the cream is 10-1000 mg / g. The cream is composed of the following raw materials in parts by weight: 5 parts by weight of glycerin, 5 parts by weight of moisturizer, 5 parts by weight of plant extract, 2 parts by weight of coconut oil antibacterial softener, 1 part by weight of betaine, 3 parts by weight of dipotassium glycyrrhizate, 2 parts by weight of penetrant, 2 parts by weight of surfactant, and 10 parts by weight of deionized water.

2. A maintenance-type disposable absorbent product according to claim 1, characterized in that: The permeation hole is funnel-shaped, and the maximum diameter of the permeation hole is 0.5-2.5 mm.

3. A maintenance-type disposable absorbent product according to claim 1, characterized in that: The depth of the guide groove is 0.3-0.7 mm, and the shape of the guide groove is a straight bar.

4. A maintenance-type disposable absorbent product according to claim 1, characterized in that: The amount of cream in the liquid-permeable surface layer is more than 20% of the total amount of cream, the cream content in the guide layer is ≥0.5 mg / g, and the cream content in the absorbent body is ≥1 mg / g.

5. The maintenance-type disposable absorbent product according to claim 1, characterized in that: The area of ​​cream distributed on the liquid-permeable surface layer is ≥10000mm 2 The distribution area of ​​the cream in the guide layer and the absorbent body is ≥1000mm 2 .

6. A maintenance-type disposable absorbent product according to any one of claims 1 to 5, characterized in that: The liquid-permeable surface layer is any one of hot air non-woven fabric, spunlace non-woven fabric, spunbond non-woven fabric, and hot-rolled non-woven fabric.

7. A maintenance-type disposable absorbent product according to claim 6, characterized in that: The liquid-permeable surface layer is made of pure cotton non-woven fabric.

8. A maintenance-type disposable absorbent product according to claim 7, characterized in that: The fiber raw material of the pure cotton non-woven fabric consists of long-staple cotton and fine-staple cotton, and the weight proportion of the long-staple cotton is ≥2%.

9. The maintenance-type disposable absorbent product according to claim 1, characterized in that: The absorbent body is composed of a first long absorbent body, a central convex absorbent body, a wrapping layer and a second long absorbent body stacked in sequence. The central convex absorbent body is made of a mixture of fluff pulp and a high-molecular absorbent resin. The wrapping layer is an e-shaped folded wrapping of the central convex absorbent body, and the material of the wrapping layer is the same as that of the central convex absorbent body.

10. A maintenance-type disposable absorbent product according to claim 9, characterized in that: The first long absorbent body and the second long absorbent body are any one of hydrophilic non-woven fabric, absorbent paper, dust-free paper, and toilet paper.

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