Embossed Superabsorbent Particles for Faster Fluid Intake
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Solution Overview
Problem
Conventional absorbent products with high superabsorbent material (SAM) content tend to leak prematurely due to low absorption rates, leading to inefficiencies in fluid intake and skin dryness issues, as the compression of SAM particles damages their mechanical properties and reduces absorption capacity.
Innovation Solution
The surface area of SAM particles is increased through microembossing with micron-sized patterns, using an embossing roller with pins at pressures ranging from 125 psi to 1000 psi, to enhance fluid intake rates and reduce product thickness and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If SAM particles are compressed to reduce product thickness, then product thickness is reduced, but absorption capacity is reduced due to damaged mechanical properties
Solution Approach 1:
The patent utilizes the porous structure of SAM particles as the core functional element. By embossing the particle surfaces rather than compressing them, the invention maintains the internal porosity and void volumes of the particles while reducing overall product thickness through the formation of a thinner, more distributed particle layer with enhanced surface contact area.
Solution Approach 2:
The invention transitions from three-dimensional compression of particles to two-dimensional surface modification through embossing. This dimensional shift allows thickness reduction while preserving particle integrity and absorption capacity by modifying the surface geometry rather than applying compressive forces that collapse internal structures.
2Area of stationary object
If conventional compression methods are used to increase surface area, then surface area is increased, but mechanical properties are damaged and absorption capacity is reduced
Solution Approach 1:
The embossing process is applied to SAM particles before they are incorporated into the final absorbent product. This preliminary surface modification creates the desired surface area enhancement in advance, allowing the particles to maintain their enhanced surface geometry throughout subsequent product formation and usage without requiring additional compression that would damage their mechanical properties.
Solution Approach 2:
The invention changes the geometric parameters of the particle surfaces through embossing, creating micropatterns that increase surface area. This parameter modification is achieved through controlled deformation that alters surface topology without compromising the structural integrity or mechanical strength of the particles.
3Quantity of substance
If high SAM content is used to improve absorption capacity, then absorption capacity is improved, but leakage increases due to low absorption rate and high free fluid
Solution Approach 1:
The embossing treatment is applied to SAM particles before product assembly, pre-enhancing their surface area and absorption kinetics. This preliminary action ensures that when the particles are incorporated into high-SAM-content products, they immediately exhibit faster absorption rates that can handle the higher free fluid loads without premature leakage.
Solution Approach 2:
By modifying the surface area parameter of SAM particles through embossing, the invention changes the kinetic parameters of fluid absorption. This parameter change enables high-SAM-content formulations to achieve both high absorption capacity and high absorption rate, resolving the leakage issue that plagues conventional high-SAM products.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The embossed SAM particles demonstrate significantly faster fluid absorption rates, reducing leakage and improving skin dryness by increasing the surface area and maintaining mechanical properties, thus enhancing the performance of absorbent products.
Implementation Method 1
Superabsorbent materials (SAMs) are three-dimensional networks that can absorb and retain water (or other aqueous media) and physiological fluids such as urine and blood more than hundreds times of their own dry weight
Implementation Method 2
maximize the use of available capillary spaces
Data Source
AI summary
Described herein are absorbent composites containing embossed superabsorbent materials and methods of manufacturing absorbent composites containing embossed superabsorbent materials. The absorbent composites have significantly improved rates of intake. Compositions and methods described herein are useful in a variety of absorbent products.