Two-Sided Multi-Ply Tissue with Smooth and Textured Surfaces
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Solution Overview
Problem
Existing multi-ply tissue products lack differing surface textures, compromising their ability to provide both a smooth surface for personal care and a textured surface for wiping and scrubbing applications.
Innovation Solution
A multi-ply tissue product is formed by combining a substantially smooth creped tissue ply with a textured through-air dried ply, creating distinct surface characteristics and improved bulk and tensile strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-ply tissue product uses plies with similar structure and manufacturing techniques, then the product is easier to manufacture, but it lacks differing surface textures for different applications
Solution Approach 1:
The tissue product is divided into multiple plies, each manufactured using different papermaking techniques (e.g., creped process for smooth surface, through-air dried process for textured surface). This segmentation allows each ply to have distinct surface characteristics while maintaining separate manufacturing optimization, resolving the contradiction between versatility and manufacturing complexity.
Solution Approach 2:
Different plies within the multi-ply product are given different local qualities through varying manufacturing processes. The creped ply provides a smooth surface for skin contact, while the through-air dried ply provides a textured surface for wiping, allowing each region of the product to be optimized for its specific function without complicating the overall manufacturing system.
2Reliability
If a dense, thin middle ply is used to improve absorbency, then absorbency is improved, but softness is compromised and surface texture variety is reduced
Solution Approach 1:
The middle ply is manufactured with different local qualities - it has dense, thin regions for absorbency while also incorporating textured regions for wiping capability. This allows the middle ply to simultaneously provide absorbency enhancement and surface texture variety without compromising the softness provided by outer smooth plies.
Solution Approach 2:
The multi-ply product combines different ply types (smooth creped plies and textured through-air dried plies) to create a composite structure where each component contributes different properties. The smooth plies provide softness and the textured plies provide absorbency and wiping capability, resolving the contradiction between absorbency and softness.
3Adaptability or versatility
If a textured through-air dried ply is used for wiping applications, then wiping performance is improved, but the surface smoothness for personal care is reduced
Solution Approach 1:
The tissue product segments different functions into different plies - the creped ply is optimized for smooth surface contact with skin, while the through-air dried ply is optimized for textured wiping performance. This functional segmentation allows each ply to excel at its specific task without compromising the other function.
Solution Approach 2:
The multi-ply tissue product achieves multi-functionality by combining plies with different surface characteristics. The same product can provide both smooth surface contact for personal care and textured surface for wiping, making it universally applicable to multiple uses without requiring separate products.
Data Source
AI summary
The invention provides a multi-ply tissue product having different surface characteristics on each side of the product. The multi-ply tissue product may be formed from two or more plies where one surface is formed by a substantially smooth creped ply and the other surface is formed by a textured through-air dried ply. In this manner the tissue product may be used for both personal care, which requires a soft and smooth surface, and general household wiping, which requires a rough, durable surface.