Striped Nonwoven Surface for Faster Fluid Intake and Leak Control
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Solution Overview
Problem
Existing non-woven fabrics used in disposable hygiene products lack effective mechanisms to guide body fluids efficiently while maintaining comfort and preventing side leakage, with improper distribution of convex regions and openings leading to wetness and discomfort.
Innovation Solution
A non-woven fabric with longitudinally arranged stripe protrusions and opening regions, providing a soft and dry surface that guides body fluids longitudinally and enhances permeability, using materials like hot air through, spunbond, or spunlace non-woven fabrics with hollow or solid protrusions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If convex regions and openings are distributed on a three-dimensional non-woven fabric, then permeability and dryness are improved, but improper distribution causes body fluid to leak or remain on the fabric
Solution Approach 1:
The patent applies local quality by creating distinct functional zones: stripe protrusions with guiding grooves for fluid direction, convex regions for permeability, and surrounding barrier regions for fluid containment. Each zone has optimized local properties - the guiding grooves channel fluid longitudinally, convex regions accelerate permeation, and barrier regions prevent lateral leakage, resolving the contradiction between speed and reliability.
Solution Approach 2:
The non-woven fabric is segmented into functionally distinct regions: stripe protrusions with longitudinal guiding grooves, convex regions with openings for permeation, and barrier regions. This segmentation allows each zone to perform its specific function - guiding, permeating, and containing - thereby achieving both fast permeation and reliable fluid containment without mixing functions that would compromise either performance.
2Ease of manufacture
If a planar non-woven fabric is used, then manufacturing is simple, but it lacks effective fluid guidance and causes wetness
Solution Approach 1:
The patent transitions from a two-dimensional planar structure to a three-dimensional structure with stripe protrusions extending vertically from the fabric surface. This dimensional addition creates guiding grooves and convex regions that actively guide and accelerate fluid permeation longitudinally, providing effective fluid guidance while maintaining compatibility with standard non-woven fabric manufacturing processes.
3Object-affected harmful factors
If the surface layer contacts the skin directly, then comfort is reduced due to adhesion, but increasing protrusion height may cause discomfort
Solution Approach 1:
The patent optimizes the protrusion height parameter within a specific range (0.5-3.0 mm) to balance two opposing requirements: sufficient height to reduce skin contact area and form air isolation layers for preventing adhesion, but limited height to maintain comfort and prevent excessive rigidity. This parameter optimization resolves the contradiction between reducing harmful adhesion and maintaining comfort.
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 stripe protrusions reduce skin adhesion, enhance fluid permeation speed, and prevent side leakage, ensuring a dry and comfortable experience by minimizing contact area and forming air isolation layers.
Implementation Method 1
the stripe protrusions not only reduce the contact area between the surface layer of the absorption product and the human body, but also form an air isolation layer between the human body and the absorption product, thereby effectively prevent skin adhesion
Implementation Method 2
The stripe protrusions arranged along a longitudinal direction can guide the body fluid along a longitudinal direction of the absorption product, thereby enlarging the permeation areas of the body fluid, accelerating the infiltration speed of the body fluid
Implementation Method 3
The opening regions between adjacent stripe protrusions can accelerate the infiltration of the body fluid, and the body fluid can quickly pass through the openings and being absorbed by an absorbent core
Data Source
AI summary
Disclosed in the present invention are a non-woven fabric having stripe protrusions on a surface, and an absorption product thereof. The surface of the non-woven fabric has several stripe protrusions which longitudinally extend and are transversely distributed; the stripe protrusions have a height between 0.5 mm-3.0 mm; a plurality of openings are formed in opening areas formed between the adjacent stripe protrusions; and the average area of each opening is less than 20 mm2. The longitudinal stripe protrusions on the surface of the non-woven fabric can guide body fluid in the longitudinal direction of the absorption product to increase a body fluid permeation area and increase the body fluid infiltration speed as well as effectively stop the body fluid from leaking laterally.