Wearing Article Waist Interlayer Sheet for Decorative Visibility
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Solution Overview
Problem
Existing disposable wearing articles face challenges in enhancing decorative element visibility while maintaining flexibility and preventing skin visibility, as thin outer layers can compromise softness and increased inner layer mass can lead to stiffness.
Innovation Solution
Incorporating an interlayer sheet between the inner and outer layer sheets in the waist regions, with the outer layer made of crimped conjugate fibers and the inner layer having a higher brightness value, allows for enhanced decorative element visibility and restricted skin visibility without compromising flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the thickness of the outer layer sheet is reduced to enhance light transmittance and decorative element visibility, then the visibility for decorative element is improved, but the soft texture and flexibility of the article are deteriorated
Solution Approach 1:
The patent introduces a new dimension by adding an interlayer sheet between the inner and outer layer sheets. This interlayer contains the decorative element and has higher light transmittance, allowing decorative visibility enhancement without reducing the outer layer thickness. The outer layer can maintain its thickness and flexibility while the interlayer provides the light transmittance function for decorative element visibility.
Solution Approach 2:
The interlayer sheet acts as an intermediary between the inner and outer layer sheets. It mediates the conflicting requirements by providing high light transmittance for decorative element visibility while allowing the outer layer to maintain its thickness and flexibility. The interlayer with mass per unit area of 5-20 g/m² and light transmittance of 70-90% achieves this balancing function.
2Ease of operation
If the mass per unit area of the inner layer sheet is increased to improve texture and softness, then the texture is improved, but the stiffness increases and flexibility is reduced
Solution Approach 1:
The patent adds a new dimensional element - the interlayer sheet with decorative elements - which allows the inner layer sheet mass to be optimized for texture without compromising overall flexibility. The interlayer with specific properties (mass per unit area 5-20 g/m², light transmittance 70-90%) provides an additional degree of freedom in the structure.
Solution Approach 2:
The patent changes the parameters of the interlayer sheet to achieve the desired balance. By setting the mass per unit area of the interlayer to 5-20 g/m² and light transmittance to 70-90%, it creates a structure where the inner layer can have sufficient mass for texture while the overall assembly remains flexible due to the lightweight interlayer design.
3Illumination intensity
If the outer layer sheet is made thinner to enhance decorative element visibility, then the light transmittance is improved, but the likelihood that wearer's skin might be seen through increases
Solution Approach 1:
The interlayer sheet serves as an intermediary that resolves the conflict between light transmittance and skin privacy. It has high light transmittance (70-90%) to allow decorative element visibility but is positioned and designed such that it blocks skin visibility while maintaining the aesthetic function. The outer layer can be thinner without compromising privacy because the interlayer provides the necessary optical filtering.
Solution Approach 2:
The patent applies local quality by giving different regions of the wearing article different optical properties. The interlayer has high light transmittance in regions where decorative elements are located to enhance visibility, while the overall structure maintains sufficient opacity in skin-exposed areas to prevent skin visibility. This localized optimization resolves the contradiction between decorative visibility and skin privacy.
Data Source
AI summary
The wearing article has front and rear waist regions and a crotch region wherein a first waist region as one of the front and rear waist regions includes an outer layer sheet located on non-skin-facing surface, an inner layer sheet located on the inner side compared to the outer layer sheet and an interlayer sheet interlaid between the inner and outer layer sheets and having a decorative element being visually recognizable from the non-skin-facing surface side of the outer layer sheet and the outer layer sheet is nonwoven fabrics formed from crimped conjugated fibers and a brightness value of the inner layer sheet is higher than a brightness value of the outer layer sheet.