Fibre Composition Length Distribution for Sheet Strength
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Solution Overview
Problem
Conventional cellulose fibre compositions face challenges in maintaining wet sheet strength during processing and after drying due to inadequate fibre size distribution, leading to insufficient interlacing and bonding between fibres, which affects the mechanical properties of the final product.
Innovation Solution
A fibre composition with a specific length distribution (0 to 7 mm) and viscosity range (10 to 20 cP) is developed, utilizing high-energy refining to ensure appropriate fibre size distribution, promoting better interlacing and bonding, and featuring redispersibility to enhance mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional low energy refining is used, then energy consumption is reduced, but fibre size distribution is inadequate leading to insufficient interlacing and bonding
Solution Approach 1:
The patent applies parameter changes by optimizing the energy level of refining and controlling fibre size distribution parameters. By adjusting refining energy to achieve specific fibre length and surface area parameters, the composition achieves both adequate energy consumption and high sheet strength through improved fibre interlacing and bonding.
Solution Approach 2:
The patent uses composite materials by combining natural fibres with specific functional additives and controlling the composition's viscosity and fibre size distribution. This composite approach enables the mixture to achieve high strength while maintaining appropriate energy consumption levels through synergistic effects.
2Quantity of substance
If fibre composition is applied in small quantities, then material usage is reduced, but maintaining sufficient bonding strength becomes difficult
Solution Approach 1:
The patent applies parameter changes by optimizing viscosity (10-20 cP) and fibre size distribution parameters. These parameter optimizations enable the fibre composition to achieve effective bonding even when applied in small quantities, as the controlled fibre dimensions and viscosity ensure adequate fibre availability and interlacing without requiring large amounts of material.
Solution Approach 2:
The patent applies local quality by ensuring uniform fibre size distribution and controlled fibre length characteristics throughout the composition. This local uniformity in fibre properties enables consistent bonding performance even at low concentrations, as each local area maintains the necessary fibre availability and interlacing capability.
3Strength
If high energy refining is used, then fibre size distribution is improved for better interlacing, but energy consumption increases
Solution Approach 1:
The patent applies parameter changes by identifying and optimizing the specific energy level range for refining that achieves adequate fibre size distribution without excessive energy consumption. By controlling refining parameters to achieve the desired fibre length and surface area, the process balances energy input with interlacing quality.
Solution Approach 2:
The patent applies partial action by using a moderate, optimized level of refining energy rather than maximum energy input. This partial approach is sufficient to achieve the necessary fibre size distribution and interlacing quality while avoiding the excessive energy consumption that would result from over-refining.
Data Source
AI summary
The present invention relates to a high-strength fibre composition comprising fibres up to 7 mm long with a viscosity of between 10 and 20 cP. The fibres present in said composition are distributed according to the length thereof, thereby guaranteeing high strength. The fibre composition according to the invention can also be redispersible. The use of the fibre composition according to the invention and an article comprising said composition are also disclosed.