CN-122005217-A - Sanitary towel based on phase change material and special for puerpera and preparation method thereof

CN122005217ACN 122005217 ACN122005217 ACN 122005217ACN-122005217-A

Abstract

The application relates to the technical field of sanitary products, and particularly discloses a sanitary towel based on a phase change material and specially used for puerpera and a preparation method thereof. The product comprises a surface layer, a flow guide layer, an absorption core body and a leakage-proof bottom layer which are sequentially overlapped, wherein the surface layer contains a microencapsulated phase change material, the flow guide layer is of a double-layer structure of a hydrophilic layer of sulfonylation carboxymethyl chitin fiber and an anti-reverse osmosis layer of viscose fiber, and the absorption core body is formed by compounding a liquid rapid diffusion layer with gradient pores and a high polymer water locking layer. The preparation method comprises microcapsule preparation, functional layer preparation, diversion layer needling compounding and sectional hot-pressing assembly molding, wherein the sectional hot-pressing is matched with the polyolefin hot-melt adhesive to adapt to the characteristics of each layer. The product is suitable for women after delivery, can realize rapid conduction and diffusion and stable latching of liquid, and can regulate the body temperature at the same time, and the preparation method has strong process adaptability, can ensure firm structure of the product, protect the structure and functional integrity of each functional layer, and has excellent overall stability.

Inventors

ZHENG JIANHUI
LIU GUOYAO
Gao Nazi
HUANG MAN
XIE LUYU

Assignees

广州健朗医用科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260310

Claims (10)

1. A sanitary towel special for puerpera based on phase change materials is characterized by comprising a surface layer, a flow guide layer, an absorption core body and a leakage-proof bottom layer which are sequentially overlapped from a skin-adhering surface to a skin-far surface, wherein the flow guide layer is of a double-layer structure, the upper layer is a hydrophilic layer formed by sulfonylation carboxymethyl chitin fibers, the lower layer is an anti-reverse osmosis layer formed by viscose fibers, the surface layer is a non-woven fabric layer formed by skin-friendly fibers, microcapsule phase change materials are uniformly dispersed in the skin-friendly fibers, the absorption core body is of a layered composite structure, and comprises a liquid rapid diffusion layer positioned on the skin-adhering side and a high polymer water locking layer positioned on the skin-far side, and the liquid rapid diffusion layer and the high polymer water locking layer are combined into a whole.
2. The sanitary towel special for puerpera based on the phase change material, which is disclosed in claim 1, is characterized in that a capsule core of the microcapsule phase change material is paraffin, a capsule shell is polyurethane, the volume average particle size of the microcapsule phase change material is 10-50 μm, the phase change temperature is 28-32 ℃, and the feeding mass ratio of the paraffin to polyurethane prepolymer for forming the capsule shell is 1:1-1:3.
3. The sanitary towel special for puerpera based on the phase change material, as set forth in claim 1, wherein the liquid rapid diffusion layer is composed of an upper surface layer, a middle layer and a lower surface layer, wherein the upper surface layer and the lower surface layer are made of ES fibers, the middle layer is made of bamboo-based modified viscose yarns, the upper surface layer, the middle layer and the lower surface layer are fixed through crosslinking, and the pore diameters of the upper surface layer, the middle layer and the lower surface layer are continuously decreased in gradient from top to bottom.
4. The sanitary towel special for puerpera based on the phase-change material according to claim 1, wherein the surface layer is a bamboo fiber non-woven fabric layer or a silk fiber non-woven fabric layer.
5. A method for preparing a sanitary towel based on phase change material for women, characterized in that the sanitary towel based on phase change material for women as claimed in any one of claims 1-4 comprises the following steps: S1, preparing a phase change material microcapsule, namely mixing paraffin with polyurethane prepolymer by adopting an interfacial polymerization method, then adding an emulsifying agent and a diamine curing agent, and stirring and reacting to obtain the paraffin-polyurethane microcapsule; S2, preparing a composite surface layer, namely preparing the microcapsule phase-change material and the skin-friendly fiber into non-woven fabrics through a blending yarn process, or preparing the skin-friendly fiber into a non-woven fabric base material, and attaching the microcapsule phase-change material to the base material through a dipping or spraying process to form the surface layer; S3, compounding the diversion layer, namely superposing the sulfonylation carboxymethyl chitin fiber layer and the viscose fiber layer, and compounding by adopting a needling process to prepare a double-layer diversion layer; S4, preparing an absorption core body, namely compounding the liquid rapid diffusion layer and the high polymer water locking layer through a hot pressing or gluing process to form the absorption core body; s5, assembling and forming, namely sequentially overlapping the surface layer, the flow guide layer, the absorption core body and the leakage-proof bottom layer, bonding by adopting a hot pressing process, and cutting and packaging to obtain a finished product.
6. The method for preparing the sanitary towel based on the phase-change material for the puerpera, as set forth in claim 5, wherein in the step S1, the reaction temperature is 50-70 ℃, the stirring speed is 300-600r/min, and the stirring time is 2-4h.
7. The method for preparing the sanitary towel based on the phase change material for the puerpera, which is characterized in that in the step S2, when the skin-friendly fiber is the bamboo fiber, the bamboo fiber is treated for 1-3 hours in an inert atmosphere at the pressure of 0.05-0.2MPa and the temperature of 60-90 ℃ to obtain the nanoscale bamboo fiber, and then the nanoscale bamboo fiber and the microencapsulated phase change material are manufactured into the non-woven fabric surface layer through a blending yarn process.
8. The method for preparing the sanitary towel special for the puerpera based on the phase change material, which is characterized in that in the step S2, when the skin-friendly fiber is silk fiber, the silk fiber is firstly made into a non-woven fabric base material, the microencapsulated phase change material is attached to the base material through an immersion or spraying process, the finishing liquid used by the immersion or spraying comprises 5-10% of polyurethane adhesive by mass, and the treated material is dried for 1-3min at 60-80 ℃ to form a composite surface layer.
9. The method of claim 5, wherein in step S4, the polymer water-locking layer is formed by alternately laminating and compositely forming at least one polymer water-absorbing material layer and at least one non-woven fabric supporting layer.
10. The method for preparing the sanitary towel special for the puerpera based on the phase change material, which is characterized in that in the step S5, the hot pressing process is a sectional hot pressing process, the hot pressing temperature of the first section is 80-100 ℃, the pressure is 0.1-0.2MPa, the time is 5-10S, the hot pressing temperature of the second section is 100-120 ℃, the pressure is 0.2-0.3MPa, the time is 3-8S, and the polyolefin hot melt adhesive is precoated between adjacent layers during lamination, and the coating amount is 5-15g/m < 2 >.

Description

Sanitary towel based on phase change material and special for puerpera and preparation method thereof Technical Field The application relates to the technical field of sanitary products, in particular to a sanitary towel special for puerpera based on a phase change material and a preparation method thereof. Background The sanitary towel special for puerpera is a necessary sanitary article for puerpera, and is mainly used for absorbing postpartum lochia, and the use scene of the sanitary towel has higher requirements on the absorption performance, the body feeling comfort and the temperature suitability of the product. The conventional sanitary towel for puerpera is generally formed by overlapping a surface layer, a flow guide layer, an absorption core body and a leakage-proof bottom layer, wherein the layers respectively bear the functions of skin-friendly, flow guide, absorption and leakage prevention, and the performance of the sanitary towel directly influences the use experience and sanitary safety of puerpera, so that the sanitary towel for puerpera with good liquid treatment capacity and somatosensory adjusting effect is a demand direction in the current industry. The structure of each layer of the conventional sanitary towel for puerpera is mainly conventional, systematic cooperative matching is lacking, the surface layer is made of common skin-friendly materials, an effective temperature adjusting structure is not arranged, the structural design of the diversion layer and the absorption core body is simple, quick conduction, uniform diffusion and stable latching of liquid cannot be realized, and meanwhile, the body temperature sensitivity in the use process is difficult to dynamically adjust, so that the conditions of local aggregation of liquid, discomfort of body feel and the like are easy to occur when the sanitary towel is used, and the use requirements of high lochia amount, skin sensitivity and high use comfort requirement after the puerpera is difficult to fully adapt to the puerperal production are met. Disclosure of Invention The application provides a sanitary towel special for a puerpera based on a phase change material and a preparation method thereof, which aim to solve the problems that the prior sanitary towel for the puerpera has the defects of cooperative cooperation of layers, can not realize rapid liquid conduction, uniform diffusion, stable latching and dynamic adjustment of body temperature sensing, and is difficult to adapt to the use requirement of the puerpera. In a first aspect, the application provides a sanitary towel special for puerpera based on phase change materials, which adopts the following technical scheme: A sanitary towel special for puerpera based on phase change materials comprises a surface layer, a flow guide layer, an absorption core body and a leakage-proof bottom layer which are sequentially overlapped from a skin-attaching surface to a skin-far surface, wherein the flow guide layer is of a double-layer structure, the upper layer is a hydrophilic layer formed by sulfonylation carboxymethyl chitin fibers, the lower layer is an anti-reverse osmosis layer formed by viscose fibers, the surface layer is a non-woven fabric layer formed by the skin-friendly fibers, microencapsulated phase change materials are uniformly dispersed in the skin-friendly fibers, the absorption core body is of a layered composite structure, and comprises a liquid rapid diffusion layer located on the skin-attaching side and a high polymer water locking layer located on the skin-far side, and the liquid rapid diffusion layer and the high polymer water locking layer are composited into a whole. According to the technical scheme, the skin-friendly fiber of the surface layer can be directly contacted with skin to provide basic skin-friendly protection, the microencapsulated phase change material in the surface layer can absorb or release heat through the phase change process of the surface layer to regulate the temperature of a skin contact area, the sulfonylcarboxymethyl chitin fiber in the double-layer diversion layer has excellent hydrophilicity, can rapidly conduct the liquid permeated by the surface layer downwards, the viscose fiber has good compactness, can block the liquid from backfoaming to form the synergistic effect of hydrophilic conduction and reverse osmosis resistance, the liquid rapid diffusion layer in the absorption core can rapidly diffuse the liquid conducted by the diversion layer to the whole core to avoid local aggregation, the high-molecular water locking layer can stably latch the diffused liquid, the leakage-proof bottom layer can prevent the liquid from leaking to the outside, and each layer can realize synchronous operation of liquid conduction, diffusion, latching and temperature regulation through the synergistic cooperation of each layer structure to adapt to the core requirement of a use scene of a lying-in a puerpera. Preferably, the microcapsule core of th