Absorbent products and methods for manufacturing the same

Abstract

The present invention provides an absorbent product comprising an absorbent core body 1. The absorbent core body 1 comprises an upper permeable layer and a lower permeable layer, the upper and lower permeable layers having an integrated polymer microporous foam structure, the upper permeable layer having a plurality of first permeable pores, and the lower permeable layer having a plurality of second permeable pores, the pore diameter of the first permeable pores being larger than the pore diameter of the second permeable pores. A hydrophilic surface layer 2 is provided on the upper surface of the absorbent core body 1, and a water-repellent bottom surface layer 3 is provided on the lower surface. The absorbent core body 1 is obtained by reacting an acrylate monomer, a modified acrylate, a crosslinking agent, a photoinitiator, an emulsifier, and an initiator, the modified acrylate being obtained by reacting the reaction product of isosorbide and glycidyl ether with acrylic acid. The present invention solves the problems of delayed liquid absorption, lateral leakage, and back leakage tendencies caused by the accumulation of menstrual blood on the surface of the absorbent core body, and has good applicability prospects.

Claims

1. Absorbent articles, It includes a hydrophilic surface layer, a hydrophobic bottom layer, and an absorbent core disposed between the hydrophilic surface layer and the hydrophobic bottom layer, The absorbent core comprises a high-internal-phase emulsion foam containing an acrylate monomer, a modified acrylate, a crosslinking agent, a photoinitiator, and an emulsifier. The modified acrylate is obtained by reacting the reaction product of isosorbide and glycidyl ether with acrylic acid. The absorbent article comprises an upper permeable layer and a lower permeable layer, wherein the upper permeable layer includes a plurality of first permeable holes having a first pore diameter, and the lower permeable layer includes a plurality of second permeable holes having a second pore diameter, with the first pore diameter being larger than the second pore diameter.

2. The absorbent article according to claim 1, wherein the glycidyl ether is selected from one or more of triglycidyl ether and pentaerythritol glycidyl ether.

3. The absorbent article according to claim 1 or 2, wherein the emulsifier comprises a main emulsifier and an auxiliary emulsifier.

4. The absorbent article according to claim 3, wherein the main emulsifier is selected from mono, di, 3-10-polyglycerol mono or polystearate, isostearate and oleate, preferably selected from diglycerol monoisostearate or oleate and poly-3-glycerol monoisostearate or oleate.

5. The absorbent article according to claim 4, wherein the auxiliary emulsifier is selected from aliphatic betaines or quaternary ammonium salts of short carbon chains of C2 to C4 and long carbon chains of C12 to C22, and is preferably selected from propyldimethylammonium bromide and dioctadecyldimethylammonium bromide.

6. The absorbent article according to any one of claims 1 to 5, wherein the first pore diameter is 60 to 130 μm.

7. The absorbent article according to any one of claims 1 to 6, wherein the second pore diameter is 5 to 40 μm.

8. The method for preparing the modified acrylate is as follows: a. A step of adding isosorbide, glycidyl ether and catalyst to a solvent, heating the mixture and reacting it in an inert gas atmosphere, cooling the mixture, and then precipitating, washing and drying the cooled mixture to obtain an intermediate product. b. The absorbent article according to any one of claims 1 to 7, comprising the steps of adding the intermediate product and polymerization inhibitor to a solvent, heating and stirring, adding a mixed solution of catalyst and acrylic acid, reacting, precipitation, washing and drying to obtain a modified acrylic acid ester.

9. The absorbent article according to claim 8, wherein in step (a), the temperature of the heating reaction is 60°C to 70°C, and in step (b), the temperature of the heating and stirring is 80°C to 100°C.

10. The method according to any one of claims 1 to 9, wherein the aqueous phase comprises an initiator, the initiator being selected from one or more of ammonium persulfate, sodium persulfate, potassium persulfate, and azo initiators.

11. The method according to any one of claims 1 to 10, wherein the photoinitiator is one or more of benzophenone, benzyl, thioxanthone, benzyl ketal, α-hydroxyalkylbenzophenone, α-aminoalkylbenzophenone, and acylphosphine oxide.

12. A method for preparing an absorbable core, a. A step of mixing acrylate monomer, modified acrylate, crosslinking agent, photoinitiator, and emulsifier to form an oil phase, b. A step of adding an aqueous phase to the oil phase to form a first high internal phase emulsion, c. A step of depositing the first high-internal-phase emulsion onto the surface, d. A step of exposing the first high-internal-phase emulsion to phototreatment, e. The step of introducing the first high internal phase emulsion into a steam tunnel furnace, The process includes dehydrating and drying the high internal phase emulsion to obtain the absorbent core, The modified acrylate is obtained by reacting the reaction product of isosorbide and glycidyl ether with acrylic acid.

13. The method according to claim 12, wherein the glycidyl ether is selected from one or more triglycidyl ethers and pentaerythritol glycidyl ethers.

14. The method according to claim 12 or 13, wherein the aqueous phase comprises an initiator, the initiator being selected from one or more of ammonium persulfate, sodium persulfate, potassium persulfate, and azo initiators.

15. The method according to any one of claims 12 to 14, wherein the oil phase comprises 60 parts by weight of isooctyl acrylate, 15 parts by weight of modified acrylic acid ester, 20 parts by weight of the crosslinking agent, 1 part by weight of the photoinitiator, and 5 parts by weight of the emulsifier.

16. The method for producing the modified acrylate is: a. A step of adding isosorbide, glycidyl ether and catalyst to a solvent, heating the mixture and reacting it in an inert gas atmosphere, cooling the mixture, and then precipitating, washing and drying the cooled mixture to obtain an intermediate product. b. The method according to any one of claims 12 to 15, comprising the steps of adding the intermediate product and polymerization inhibitor to a solvent, heating and stirring, adding a mixed solution of catalyst and acrylic acid, reacting, precipitation, washing and drying to obtain the modified acrylic acid ester.

17. The method according to any one of claims 12 to 16, further comprising the steps of: mixing a second acrylate monomer, a second modified acrylate, a second crosslinking agent, a second photoinitiator, and a second emulsifier to form a second oil phase; and adding a second aqueous phase to the second oil phase to form a second high-internal-phase emulsion.

18. The method according to claim 17, wherein the second high-internal-phase emulsion is deposited on the first high-internal-phase emulsion.

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