Two-Ply Tissue Paper Composition for Moistness and Smoothness Balance
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Solution Overview
Problem
Conventional moisturizing tissue paper struggles to achieve both high levels of 'smoothness' and 'moistness' while maintaining 'toughness' and 'sensation of thickness', as increasing the moisturizing agent content enhances 'moistness' but reduces 'smoothness' and 'toughness', leading to an unpleasant user experience.
Innovation Solution
A two-ply tissue paper with a basis weight of 13.5-16.2 g/m², paper thickness of 128-150 µm, and a chemical agent composition of 83.7% glycerin and 1,3-propanediol with a mass ratio of 1:0.24 to 1:5.42, providing a dry tensile strength of 64-133 cN/25 mm and wet tensile strength of 40-59 cN/25 mm, ensuring both 'moistness' and 'smoothness' are achieved without compromising 'toughness'.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the content of moisturizing agent is increased to enhance 'moistness', then 'moistness' is improved, but 'smoothness' is reduced and 'stickiness' is enhanced
Solution Approach 1:
The patent applies parameter changes by precisely controlling the concentration of moisturizing agents (polyhydric alcohol at 3-10 wt% and sugars at 2-8 wt%) and adjusting paper making parameters (basis weight 15-30 g/m², moisture content 5-15%) to achieve optimal balance between moistness and smoothness without excessive stickiness
Solution Approach 2:
The patent uses composite materials by combining multiple moisturizing agents (polyhydric alcohol and sugars in specific ratios) with paper fibers, creating a composite structure that provides both moisture retention and surface smoothness while maintaining appropriate stiffness
2Quantity of substance
If the content of moisturizing agent is increased to enhance 'moistness', then 'moistness' is improved, but 'toughness' and stiffness are reduced
Solution Approach 1:
The patent applies parameter changes by optimizing the basis weight of the base paper (15-30 g/m²) and controlling the moisture content (5-15%) to ensure that the paper maintains sufficient toughness and stiffness even with added moisturizing agents
Solution Approach 2:
The patent creates a composite material system where the paper fiber matrix provides structural strength and toughness while the moisturizing agents provide moisture retention, achieving a balance between softness and structural integrity
3Quantity of substance
If the basis weight is increased to improve 'sensation of thickness' and 'toughness', then 'toughness' is improved, but 'smoothness' and 'moistness' are reduced
Solution Approach 1:
The patent applies parameter changes by optimizing the basis weight to a specific range (15-30 g/m²) and adjusting the moisture content (5-15%) to achieve the right balance between sensation of thickness and surface smoothness
Solution Approach 2:
The patent applies local quality by ensuring uniform distribution of moisturizing agents throughout the paper structure, creating localized moisture zones that enhance smoothness and moistness without requiring excessive overall basis weight
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 described tissue paper effectively enhances 'moistness' and 'smoothness' significantly, while maintaining sufficient 'toughness' and 'sensation of thickness', providing a superior user experience compared to conventional moisturizing tissue papers.
Implementation Method 1
a water-retaining property in paper is increased due to a moisture absorption operation of the moisturizing agent
Implementation Method 2
The phase change materials, in one embodiment, can have a relatively high heat of fusion. When undergoing a phase change, the temperature change composition absorbs heat and thereby provides a cooling feeling or cooling sensation to the skin of a user
Data Source
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AI summary
[Problem] To provide tissue paper excellent in "moistness" and "smoothness". [Solution] The problem can be solved by tissue paper being two-ply tissue paper, in which a basis weight per one ply is greater than 12.9 g/m2 and less than 16.8 g/m2, a paper thickness in the two-ply state is not less than 128 µm nor more than 150 µm, and a chemical agent containing glycerin and 1,3-propanediol in a total amount of 83.7 mass% or more and having a mass ratio between glycerin and 1,3-propanediol of greater than 1:0.14 and less than 1:6.64, is contained in an amount of greater than 2.3 g/m2 and less than 6.1 g/m2.