Laminated Base Fabric with Shirring for Moisture Transpiration
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Solution Overview
Problem
Conventional disposable diaper base fabrics have low moisture transpiration ability, poor heat dissipation, and an unpleasant skin sensation due to their fiber material, leading to discomfort and inadequate skin care functions, while also being complex and costly to manufacture.
Innovation Solution
A base fabric configuration with a laminated sheet structure incorporating a first and second air-permeable fibrous sheet, a liquid-diffusible fiber material, and an elastic member for elasticity, joined using hot-melt adhesive, which forms shirring portions for improved moisture transpiration, heat dissipation, and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If nonwoven fabric is used as base fabric material, then air permeability is achieved, but moisture transpiration ability remains low
Solution Approach 1:
The patent combines nonwoven fabric with a specific resin composition to create a composite base fabric. The resin contains hydrophilic groups that enhance moisture transpiration while maintaining the air permeability of the nonwoven structure. This composite approach resolves the contradiction by integrating materials with complementary properties.
Solution Approach 2:
The patent modifies the chemical parameters of the base fabric by incorporating resins with specific hydrophilic group content (5-50 mass%). This parameter change enhances the moisture transpiration ability without compromising the air permeability, directly addressing the technical contradiction.
2Object-affected harmful factors
If liquid-impermeable back sheet is used to prevent leakage, then liquid impermeability is achieved, but moisture transpiration ability remains low
Solution Approach 1:
The patent applies different properties to different parts of the diaper structure. The back sheet maintains liquid impermeability in specific regions while incorporating moisture-permeable sections or treating certain areas with hydrophilic resins. This local differentiation allows simultaneous achievement of leakage prevention and moisture transpiration.
3Ease of manufacture
If conventional base fabric material is used, then manufacturing simplicity is maintained, but heat dissipation ability is poor
Solution Approach 1:
The patent modifies the thermal parameters of the base fabric by incorporating resins with specific thermal conductivity characteristics and hydrophilic groups. These parameter changes enhance heat dissipation ability while maintaining compatibility with existing manufacturing processes, thus resolving the contradiction between ease of manufacture and heat dissipation performance.
4Strength
If fiber material is used for base fabric, then structural integrity is achieved, but skin contact feeling is unpleasant
Solution Approach 1:
The patent creates a composite structure combining fiber material with resin composition containing hydrophilic groups. This composite approach maintains the structural integrity provided by the fiber material while adding skin-friendly properties through the hydrophilic resin, thereby resolving the contradiction between strength and skin contact feeling.
Solution Approach 2:
The patent changes the surface parameters of the base fabric by incorporating resins that modify surface energy and hydrophilicity. These parameter changes improve skin contact sensation while the underlying fiber structure maintains structural integrity, addressing the technical contradiction.
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 base fabric provides excellent moisture transpiration, heat dissipation, and flexibility, enhancing the wearing comfort of disposable textile products while allowing for efficient design representation and easy manufacturing.
Implementation Method 1
joined using hot-melt adhesive
Implementation Method 2
an elastic member for elasticity
Implementation Method 3
a liquid-diffusible fiber material
Implementation Method 4
first and second air-permeable fibrous sheet
Implementation Method 5
forms shirring portions for improved moisture transpiration
Data Source
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AI summary
The present invention provides a base fabric for a disposable textile product that excels in moisture transpiration ability, heat dissipation ability, and moisture permeability. The invention also provides the disposable textile product that uses the base fabric for the disposable textile product, which excels in feeling in wearing and contact with the skin and also excels in moisture transpiration ability, heat dissipation ability, and moisture permeability. The base fabric for the disposable textile product is configured of a laminated sheet 30 which has a first fibrous sheet 2 and a second fibrous sheet 3 having air permeability and a fiber material 4 interposed between the first fibrous sheet 2 and the second fibrous sheet 3 and having liquid diffusibility, and in which the first fibrous sheet 2 and the second fibrous sheet 3 and the fiber material 4 are laminated together with an elastic member 5. The laminated sheet 30 forms a composite layer 31 in which a fiber layer having the air permeability and a fiber layer having the liquid diffusibility are laminated. The laminated sheet 30 has a shirring portion 6 in which an uneven surface is formed by the composite layer 31. Elasticity is imparted to the laminated sheet 30.