Absorbent Resin Particle Blend for Return and Diffusion Balance
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Solution Overview
Problem
Existing absorbent articles for nursing care face challenges in balancing the amount of return and diffusion area, with existing solutions often resulting in a trade-off where either the amount of return or diffusion area is excessively suppressed.
Innovation Solution
The use of water-absorbent resin particles with specific water absorption rates and amounts under a load, combined with a mixture of resin particles A and B, to achieve a balanced reduction in both the amount of return and diffusion area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If water-absorbent resin particles with fast water absorption rate are used, then water absorption efficiency is improved, but the diffusion area becomes excessively suppressed
Solution Approach 1:
The invention divides the water-absorbent resin particles into two distinct types: particles A with fast water absorption rate (5 seconds or less) and particles B with slow water absorption rate (15 seconds or more). This segmentation allows each particle type to fulfill different functions - particles A provide rapid absorption while particles B maintain diffusion area, thereby resolving the contradiction between absorption speed and diffusion area.
Solution Approach 2:
The invention applies local quality by assigning different water absorption characteristics to different regions within the absorbent article. Particles A are distributed to provide fast absorption in specific areas, while particles B are distributed to maintain diffusion area in other areas. This spatial differentiation of properties allows simultaneous optimization of both water absorption rate and diffusion area.
2Area of stationary object
If water-absorbent resin particles with slow water absorption rate are used, then diffusion area is maintained, but water absorption efficiency decreases
Solution Approach 1:
The invention segments the particle population into two groups with contrasting absorption rates. Particles B provide slow absorption that maintains diffusion area, while particles A provide fast absorption to compensate for the slower rate of particles B. This segmentation ensures that overall water absorption efficiency is maintained while diffusion area is preserved.
Solution Approach 2:
The invention creates a composite water-absorbent resin system combining particles A and particles B with different absorption characteristics. This composite structure allows the material to exhibit both fast absorption (from particles A) and maintained diffusion area (from particles B), resolving the contradiction between absorption efficiency and diffusion area.
3Reliability
If the amount of return is excessively suppressed, then absorption performance is improved, but user comfort deteriorates
Solution Approach 1:
The invention segments the absorption function between two particle types: particles A handle rapid absorption to maintain absorption performance, while particles B provide slower absorption that prevents excessive suppression of return, thereby maintaining user comfort. This segmentation allows balanced optimization of both absorption performance and user comfort.
Solution Approach 2:
The invention changes the water absorption rate parameter by using a mixture of particles with different absorption characteristics. Particles A have fast absorption (5 seconds or less) while particles B have slow absorption (15 seconds or more). This parameter differentiation allows the system to achieve both high absorption performance and maintained user comfort by balancing the opposing effects of the two particle types.
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 solution provides an absorbent article with reduced return and diffusion area, enhancing user comfort by moderating the water absorption properties of the resin particles.
Implementation Method 1
water-absorbent resin particles having a water absorption rate of 3 to 30 seconds and a water absorption amount under a load of 2.07 kPa
Implementation Method 2
water-absorbent resin particles capable of suppressing an amount of return and a diffusion area
Data Source
AI summary
There are disclosed Water-absorbent resin particles having a water absorption rate of 3 to 30 seconds and a water absorption amount under a load of 2.07 kPa of 10 mL/g or more.