Tissue paper
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Solution Overview
Problem
Conventional moisturized tissues are soft and smooth but lack strength and are prone to breakage, making them difficult to absorb liquids like snot.
Innovation Solution
A tissue paper with a high proportion of NBKP (>70 mass%) and a high polyol content, combined with specific surface properties such as arithmetic mean curvature and developed area ratio, enhances softness, strength, and snot wiping ability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the blending ratio of LBKP is increased to improve softness and surface smoothness, then the softness and moist feeling are improved, but the paper strength deteriorates and the tissue becomes prone to breakage
Solution Approach 1:
The patent changes the fiber blending ratio parameter from conventional high LBKP (60-70%) to high NBKP (70-80%), fundamentally altering the paper's mechanical properties to achieve both softness and strength simultaneously
Solution Approach 2:
The patent creates a composite paper structure combining NBKP for strength with LBKP for surface smoothness, optimized at a specific ratio (70-80% NBKP, 20-30% LBKP) to balance mechanical strength and softness
2Ease of operation
If the blending ratio of LBKP is increased to improve surface smoothness, then the surface smoothness is improved, but the liquid absorption ability deteriorates
Solution Approach 1:
The patent adjusts the LBKP ratio to 20-30% (reduced from conventional 60-70%), changing the surface structure parameter to maintain smoothness while preserving sufficient porosity for liquid absorption
Solution Approach 2:
The patent creates local quality differentiation where the paper bulk maintains high porosity for absorption while the surface retains sufficient smoothness through controlled LBKP distribution, achieving both functions simultaneously
3Strength
If the paper thickness is increased to improve firm feeling, then the firm feeling is improved, but the softness deteriorates
Solution Approach 1:
The patent sets paper thickness at 200-300 μm, optimizing this geometric parameter to provide sufficient firmness while maintaining softness through the high NBKP content and controlled fiber composition
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 tissue paper achieves excellent softness, moist feeling, firmness, and resistance to breakage while maintaining effective snot wiping properties.
Implementation Method 1
it may be difficult to absorb a liquid such as snot
Implementation Method 2
a chemical solution containing the moisturizer remains on the surface layer, and an effect such as a moist feeling from the chemical solution is likely to develop on a paper layer surface due to moisture increase resulting from moisture absorption
Data Source
Figure 1
Figure 2
AI summary
Provided is a moisturized tissue excellent in strength and snot wiping property. In the moisturized tissue paper, a paper thickness is 220 to 330 µm, a basis weight is 15 to 18 g/m2 per ply, a proportion of NBKP in the pulp combination is more than 70 mass%, a chemical solution content is 26 to 32 mass%, an arithmetic mean curvature at a peak point of an outer surface in an unpressurized state (Spc (1)) is 4.0 to 4.8 (1/mm), and a developed area ratio at an interface on the outer surface (Sdr) is 0.020 to 0.030 (-).