Tissue paper
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Solution Overview
Problem
Moisturizer-uncoated all-purpose tissue paper requires high sensory evaluation values for soft feeling and smoothness, while maintaining strength to prevent breakage during nose blowing and low cost production.
Innovation Solution
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, dry tensile strength of 240 to 300 cN/25 mm in MD, and an average dynamic friction coefficient of 1.40 to 1.65, achieved through the use of specific softener compounds, wet paper strengthening agents, and dry paper strengthening agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If moisturizer is externally added to tissue paper to enhance soft feeling and smoothness, then sensory evaluation values improve, but the tissue becomes specialized for nose blowing and facial purposes only, increasing cost and reducing versatility
Solution Approach 1:
The invention changes the physical and chemical parameters of the base paper itself rather than adding moisturizer. Specifically, it controls basis weight (10.0-16.0 g/m² per ply), paper thickness (120-200 μm for two plies), softness (1.0 or less), dry tensile strength (240-300 cN/25 mm in MD), and average dynamic friction coefficient (1.40-1.65). These parameter adjustments enable all-purpose tissue to achieve soft feeling and smoothness comparable to moisturizing tissue without requiring external moisturizer addition, thus maintaining versatility and cost-effectiveness
2Strength
If basis weight is increased to improve strength and prevent breakage, then tensile strength improves, but soft feeling deteriorates and cost increases
Solution Approach 1:
The invention identifies an optimal parameter range where basis weight is controlled at 10.0-16.0 g/m² per ply. Within this range, the paper achieves sufficient strength (dry tensile strength of 240-300 cN/25 mm in MD) while maintaining soft feeling (softness of 1.0 or less). This precise parameter control resolves the contradiction by finding the sweet spot where both strength and softness are optimized, rather than simply increasing basis weight which would improve strength but deteriorate softness
3Strength
If paper thickness is increased to improve strength for nose blowing, then breakage resistance improves, but soft feeling and smoothness deteriorate
Solution Approach 1:
The invention controls paper thickness at 120-200 μm for two plies, which is relatively thin compared to conventional tissue. Within this thickness range, combined with controlled basis weight (10.0-16.0 g/m² per ply) and optimized fiber arrangement, the paper achieves sufficient breakage resistance for nose blowing while maintaining excellent soft feeling and smoothness. This demonstrates that thickness alone is not the determining factor for strength; rather, the combination of multiple parameters including basis weight, fiber properties, and structural characteristics determines both strength and softness
4Object-affected harmful factors
If dynamic friction coefficient is decreased to improve smoothness, then skin burden reduces, but manufacturing complexity increases
Solution Approach 1:
The invention controls the average dynamic friction coefficient within the range of 1.40-1.65 through optimization of the base paper's physical and chemical properties during manufacturing. This parameter control is achieved by adjusting fiber composition, basis weight, and pressing conditions rather than adding complex surface coatings or moisturizer layers. The resulting friction coefficient provides smoothness that reduces skin burden during rubbing actions while maintaining a relatively simple manufacturing process suitable for mass production
Data Source
AI summary
An all-purpose type tissue paper. 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/25 mm, and an average dynamic friction coefficient of 1.40-1.65.