Composite Textile Backsheet for Soft Feel and Low Lint
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Solution Overview
Problem
Conventional absorbent articles suffer from lint formation due to the use of nonwoven materials with a soft feel, leading to diaper rash, while existing backsheets are both liquid and vapor impermeable, lacking a cloth-like feel.
Innovation Solution
A textile backsheet comprising a nonwoven fabric directly or indirectly bonded to a vapor-permeable and liquid-impermeable film, with a basis weight of 3 to 12 gsm and abrasion resistance of at least 3.0, providing a soft feel and reduced lint formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If nonwoven materials with soft feel are used in backsheets, then user comfort is improved, but lint formation increases causing diaper rash
Solution Approach 1:
The patent uses a composite structure combining a nonwoven fabric layer (providing soft feel) with a film layer (providing liquid impermeability and reduced linting). This composite material approach allows the backsheet to simultaneously achieve comfort and reduce harmful lint formation by leveraging the complementary properties of each material component.
2Reliability
If conventional polymeric film backsheets are used, then liquid barrier properties are achieved, but cloth-like feel is lost
Solution Approach 1:
The patent combines a nonwoven fabric layer with a film layer to create a composite backsheet that achieves both liquid barrier properties and cloth-like feel. The nonwoven fabric provides the tactile comfort similar to cloth, while the film layer ensures effective liquid protection.
3Reliability
If VPLI film is used, then vapor permeability and liquid impermeability are achieved, but basis weight must be optimized to balance comfort and lint reduction
Solution Approach 1:
The patent optimizes the basis weight parameter of the VPLI film to a specific range (3-12 gsm) to achieve the desired balance between vapor permeability, liquid impermeability, and lint reduction. This parameter optimization allows the film to provide necessary protective functions while minimizing harmful effects.
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 offers a soft feel with reduced lint formation, enhancing user comfort and reducing diaper rash, while maintaining effective liquid barrier properties.
Implementation Method 1
the nonwoven fabric is directly or indirectly bonded to the film
Implementation Method 2
vapor-permeable and liquid impermeable (VPLI) film
Data Source
Figure 1A~1B
Figure 2A~2C
Figure 2D~2F
AI summary
Textile backsheets including a nonwoven fabric and film, such as a vapor-permeable and liquid impermeable (VPLI) film or a non-permeable film, are provided, wherein the nonwoven fabric is directly or indirectly bonded to the film. Methods of making such textile backsheets and absorbent articles including the textile backsheets are also provided.