Disposable Absorption Product with Polyurethane Foam and Reactive Particle Core
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Solution Overview
Problem
Existing disposable absorption products, such as those with wood pulp or nonwoven composite cores, often become hard and less effective after lamination, leading to inadequate softness and increased risk of leakage during use.
Innovation Solution
A disposable absorption product featuring a polyurethane foam layer with a particle layer composed of super-absorbable polymer, organic acid, and anhydrous bicarbonate particles, which maintains softness and enhances liquid absorption and locking capabilities, while the generated carbon dioxide improves comfort by reducing temperature and humidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional wood pulp or nonwoven composite cores are used and laminated multiple times during production, then the absorption product can be manufactured, but the fibers in the absorbable cores become accumulated and hardened, resulting in insufficient softness and increased risk of leakage
Solution Approach 1:
The patent changes the material parameter from traditional fibrous materials (wood pulp, nonwoven fabric) to polyurethane foam material. This parameter change fundamentally alters the physical properties of the absorbable core, maintaining softness and elasticity while enabling effective absorption, thereby resolving the contradiction between manufacturability and softness.
Solution Approach 2:
The patent uses composite material structure by combining polyurethane foam with particle layers (super-absorbable polymer particles, organic acid particles, and anhydrous bicarbonate particles). This composite approach maintains the softness and elasticity of the foam while adding enhanced absorption capabilities and functional effects, resolving the contradiction between manufacturability and softness.
2Ease of manufacture
If traditional absorbable cores are laminated multiple times, then the product can be assembled, but the core becomes very hard and cannot be well attached to the part that requires absorption, resulting in leakages
Solution Approach 1:
The patent changes the material parameter from traditional fibrous materials to polyurethane foam, which inherently maintains softness and elasticity. This resolves the contradiction by enabling the core to be well-attached to the absorption area without hardening, thereby preventing leakages while maintaining assembly capability.
Solution Approach 2:
The patent employs a disposable absorbable core design where the entire core (foam + particle layers) is replaced after a single use. This approach prioritizes performance and comfort during use, accepting that the product is single-use, thereby resolving the contradiction between assembly capability and leakage prevention.
3Ease of operation
If polyurethane foam layers are used in the absorbable core, then softness and elasticity are maintained, but additional functional particles must be added to achieve super-absorbability and cooling effects
Solution Approach 1:
The patent merges multiple functions into a single integrated structure: the polyurethane foam provides softness and elasticity, while embedded particle layers (super-absorbable polymer, organic acid, anhydrous bicarbonate) provide absorption, cooling, and comfort functions. This merging resolves the contradiction by combining multiple functionalities without significantly increasing structural complexity.
Solution Approach 2:
The polyurethane foam core serves multiple functions simultaneously: it provides the soft and elastic base structure, enables liquid distribution through its porous structure, supports the particle layers for enhanced absorption, and facilitates the cooling effect through gas generation. This multi-functionality resolves the contradiction between softness and structural complexity.
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 product provides a soft, elastic, and effective absorption solution that prevents leakage and enhances user comfort by maintaining absorbency and allowing for efficient liquid distribution and gas release.
Implementation Method 1
The absorbable core comprising said resin particles has super liquid absorption capacity and super liquid locking capacity
Implementation Method 2
the organic acid particles and the anhydrous bicarbonate particles are dissolved in water to obtain a water solution, and then the organic acid and the bicarbonate react in the water solution to generate gaseous carbon dioxide
Implementation Method 3
the upper part is an upper polyurethane foam layer which is liquid-permeable
Data Source
AI summary
An absorbable core of a disposable absorption product, having an upper polyurethane foam layer which is liquid-permeable and a wrapping layer which is capable of absorbing liquid; the wrapping layer comprises an outer part and an inner part; the outer part is a first liquid-permeable sleeve body; the inner part is an accommodating cavity; a lower polyurethane foam layer and a particle layer are provided inside the accommodating cavity; the particle layer is distributed on an upper surface of the lower polyurethane foam layer and is formed by resin particles, organic acid particles and anhydrous bicarbonate particles mixed together. A disposable absorption product comprising said absorbable core is also provided. By integrating polyurethane polymer foam with superabsorbent polymer particles, organic acid particles and anhydrous bicarbonate particles, the absorbable core is good at absorbing and locking liquid, and provides soft and elastic supporting materials which provide great comfort to users.