Sanitary napkin core body based on nanometer material

Through the precise positioning of the three-dimensional gradient crosslinking network and functional nanoparticles, the problem of the homogeneous crosslinking structure being unable to coordinate the absorption rate and liquid locking ability is solved, and the rapid absorption and long-term water locking of the sanitary napkin core is achieved, which improves compressive strength and antibacterial properties.

CN120393081APending Publication Date: 2025-08-01雷文军 +1
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Patent Information

Application Number
CN202510603447.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-12
Publication Date
2025-08-01

AI Technical Summary

Technical Problem

In the prior art, the homogenized crosslinking structure cannot achieve the absorption rate and liquid locking capacity in concert, resulting in disordered distribution of liquids in the core, and problems of local saturation, premature aging and intensified reverse osmosis.

Method used

The three-dimensional gradient cross-linking network structure and functional nanoparticles are adopted to form a cross-scale channel with dense surface and loose inner layer through flow field directional-electric field polymerization multi-order coupling technology, and the nanoparticles are accurately positioned through supercritical CO2 fluid-assisted deposition and plasma bonding technology to achieve the gradient distribution of nanomaterials.

Benefits of technology

It breaks through the mutually exclusive bottleneck of absorption rate and water locking ability, improves the compressive strength and antibacterial properties of the core, and achieves the effect of rapid absorption and long-term water locking. The accuracy of nanoparticles is improved and the antibacterial aging is extended.

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Abstract

The invention relates to the technical field of hygienic product manufacturing, and discloses a sanitary napkin core body based on a nano material, functional particles are accurately positioned through flow field directional regulation and control of fiber three-dimensional orientation distribution, pulsed electric field activation free radical gradient polymerization and supercritical CO2 deposition, a surface micropore compact water locking layer with the aperture of 5-20 microns is constructed, and an inner macropore flow guide layer is formed. The pore diameter is 80-150 microns, and a cross-scale synergistic structure is formed. Self-reconstruction of the fiber is excited by sudden change of the flow field rotating speed, and mutual exclusion limitation of the absorption rate and the liquid retention amount of a traditional homogeneous structure is broken through in combination with diffusion kinetics of a terahertz wave resonance reinforced cross-linking agent; a C-O-Ag chemical anchoring point is established by a plasma bonding technology, and the nano-silver particles are physically confined by a graphene oxide sheet layer, so that the problems of particle agglomeration and ion burst release in a traditional spraying process are solved. The dynamic multi-field synergistic process realizes porosity gradient, oriented arrangement of molecular chains and long-acting residence of functional particles, and provides a core solution with high absorptivity, zero reverse osmosis and long-acting bacteriostasis for hygienic products.
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