Tissue paper product and tissue paper product package
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Solution Overview
Problem
Moisture-retaining tissue paper products are prone to bending during storage and transportation, making them difficult to package and retrieve, as they lack the cushioning properties of general-purpose tissue paper, which affects their softness and smoothness.
Innovation Solution
A tissue paper product with specific physical properties, including a 2-ply basis weight, paper thickness, dry tensile strength, and moisturizer content, is developed, allowing it to be packaged like general-purpose products, using a cardboard case with the short side surfaces facing upwards, and containing glycerin and 1,3-propanediol as moisturizers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If moisture-retaining tissue paper is used to provide softness and smoothness, then the tissue paper becomes moist and soft due to hygroscopic effect, but the web bends during storage and transportation and cannot be smoothly popped up from the outlet
Solution Approach 1:
The invention changes the physical parameters of the tissue paper by controlling the basis weight to be 13.0 g/m² or more per ply and the web bulk to be 143 μm or more, while limiting the moisture content to 15% or less. These parameter adjustments allow the tissue to maintain softness and smoothness from the moisturizer while achieving sufficient cushioning properties to prevent bending during storage and transportation.
Solution Approach 2:
The invention creates a composite structure by combining tissue paper plies with specific basis weights and bulk characteristics with controlled moisture content. This composite approach allows the tissue to exhibit both the softness/smoothness properties needed for comfort and the structural integrity needed to resist bending, resolving the contradiction between ease of operation and reliability.
2Reliability
If moisture-retaining tissue products are packed with upper surface facing upward to prevent web bending, then the web does not bend, but the cardboard case requires increased strength and the packaging operation becomes troublesome
Solution Approach 1:
By changing the physical parameters of the tissue paper (basis weight ≥13.0 g/m² per ply, web bulk ≥143 μm, moisture content ≤15%), the invention enables the tissue to maintain its shape and resist bending even when packaged in the standard orientation with short side surfaces facing upward. This eliminates the need for special packaging orientations and reduces cardboard case strength requirements.
3Reliability
If the basis weight of tissue paper is increased to improve cushioning properties, then the web becomes less elastic and more prone to bending, but reducing basis weight improves elasticity while decreasing cushioning properties
Solution Approach 1:
The invention optimizes the basis weight parameter to be 13.0 g/m² or more per ply, which provides sufficient cushioning properties to prevent bending during storage and transportation. Combined with controlling web bulk (≥143 μm) and moisture content (≤15%), this parameter setting achieves both adequate cushioning and maintained web elasticity, resolving the contradiction between reliability and stability of composition.
Solution Approach 2:
The invention addresses the cushioning-elasticity contradiction by introducing web bulk (thickness) as an additional dimensional parameter. By specifying web bulk of 143 μm or more while controlling basis weight and moisture content, the tissue achieves sufficient cushioning properties without compromising elasticity, as the increased bulk provides cushioning volume without excessive weight that would reduce elasticity.
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 product maintains excellent softness and smoothness while achieving improved cushioning properties, reducing bending during storage and transportation, allowing for efficient packaging and retrieval, and utilizing a standard cardboard case design.
Implementation Method 1
the web of moisture-retaining tissue paper is moist and soft due to the hygroscopic effect of a moisturizer
Data Source
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AI summary
[Problem] To provide a moisturizing tissue product that can be packaged in the same way as a non-moisturizing tissue product. [Solution] With this tissue paper product in which a web obtained by folding and laminating in a pop-up configuration a plurality of sheets of tissue paper containing a moisturizing agent is stored in a rectangular-shaped paper box having an outlet on an upper surface thereof, the problem of the tissue paper is solved by this tissue paper product in which the number of plies is 2, the basis weight of 1 ply is 13.0 g/m2 to 14.5 g/m2, the paper thickness of the two plies is greater than 143 µm to less than 175 µm, the dry tensile strength in the longitudinal direction is greater than 276 cN/25 mm to 346 cN/25 mm or less, the dry tensile strength in the lateral direction is greater than 102 cN/25 mm to 150 cN/25 mm or less, the content of the moisturizing agent is 1.1 g/m2 to 2.5 g/m2, the compressive stress of the web is greater than 0.51 g/cm2 to less than 0.86 g/cm2, the ratio of the value obtained by multiplying the paper thickness and the number of sets to the volume of the web is 0.35 or more, the ratio of the volume of the web to the height of the paper box is 0.94 to less than 0.98, the ratio of the length of the tissue paper in the lateral direction to the length of the paper box in the longitudinal direction 0.84 or more, and the space volume ratio is 78 % or more.