Two-Ply Tissue Composition for Softness-Strength Balance
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Solution Overview
Problem
Moisturizer-uncoated all-purpose tissue paper struggles to achieve high sensory evaluation values for softness and smoothness while maintaining strength and preventing skin damage during use, and it must be cost-effective.
Innovation Solution
A two-ply tissue paper with a basis weight of 10.0 to 16.0 g/m², paper thickness of 120 to 200 µm, softness of 1.0 or less, and dry tensile strength of 240 to 300 cN/25 mm, achieved using a combination of pulp fibers, polyamide epichlorohydrin as a wet paper strengthening agent, polyacrylamide or cationic starch as a dry paper strengthening agent, and fatty acid ester and fatty acid amide compounds as softeners, with a specific ratio of these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If moisturizer is externally added to tissue paper, then soft feeling and smoothness are enhanced, but cost increases and skin burden increases
Solution Approach 1:
The invention extracts and removes the moisturizer component from the tissue paper structure, achieving softness and smoothness through fiber selection and papermaking parameters instead of chemical additives, thereby eliminating skin burden while maintaining comfort
Solution Approach 2:
The invention changes the physical parameters of the tissue paper including basis weight (10.0-16.0 g/m²), paper thickness (120-200 µm), softness (1.0 or less), and dry tensile strength (240-300 cN/25 mm) to achieve the desired softness and smoothness without requiring moisturizer additives
2Ease of manufacture
If tissue paper is made thinner to reduce cost, then price decreases, but strength decreases and breakage occurs
Solution Approach 1:
The invention optimizes the basis weight to 10.0-16.0 g/m² and paper thickness to 120-200 µm, achieving a balance between cost-effectiveness and strength by preventing breakage during nose blowing while maintaining low production costs
Solution Approach 2:
The invention uses a composite structure with specific pulp fiber compositions and papermaking chemicals (polyamide epichlorohydrin, polyacrylamide, cationic starch) to enhance strength properties at reduced thickness, preventing breakage while maintaining cost-effectiveness
3Strength
If basis weight is increased to improve strength, then breakage resistance improves, but cost increases
Solution Approach 1:
The invention sets the basis weight within 10.0-16.0 g/m², optimizing the balance between breakage resistance and manufacturing cost by achieving sufficient strength through controlled fiber composition and papermaking parameters rather than simply increasing basis weight
Solution Approach 2:
The invention employs composite materials with specific pulp fiber mixtures and papermaking additives to maximize strength properties at the target basis weight range, achieving breakage prevention without excessive cost increase
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 high sensory evaluation values for softness and smoothness, minimizes skin burden, and prevents breakage during use, while maintaining strength and affordability.
Implementation Method 1
polyamide epichlorohydrin as a wet paper strengthening agent
Implementation Method 2
polyacrylamide or cationic starch as a dry paper strengthening agent
Implementation Method 3
fatty acid ester and fatty acid amide compounds as softeners
Data Source
Figure 1
AI summary
[Problem] To provide an all-purpose type tissue paper that is excellent in softness, smoothness, and strength. [Solution] This problem is solved by a two-ply tissue paper that does not have moisturizer applied thereon, that has a basis weight per ply of 10.0-16.0 g/m2, a paper thickness per two-ply of 120-200 µm, a softness of not more than 1.0, a dry tensile strength (T) in the MD direction of 240-300 cN/25mm, and an average dynamic friction coefficient of 1.40-1.65.