Hesperaloe Fiber Towel Composition for Wet Strength and Absorbency
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Solution Overview
Problem
Conventional paper products struggle to balance high absorbency and fast absorbency rates while maintaining cost-effectiveness, particularly in using non-wood fibers which often compromise on bulk and stiffness.
Innovation Solution
The use of high yield hesperaloe fibers in combination with wood fibers to create tissue products with enhanced absorbency and wet durability, achieving absorbent capacities greater than 7.0 g/g and CD Wet/Dry ratios greater than 0.30 without negatively affecting stiffness and bulk, by replacing a significant portion of Northern softwood kraft fibers with hesperaloe fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If non-wood fibers are used to reduce costs and minimize fiber amount, then cost-effectiveness improves, but bulk and stiffness deteriorate
Solution Approach 1:
The patent uses composite materials by combining hesperaloe fibers with wood fibers in a blended tissue product. This composite approach allows the non-wood hesperaloe fibers to provide cost-effectiveness and high absorbency while the wood fibers contribute bulk and stiffness, resolving the contradiction between cost reduction and mechanical property maintenance
Solution Approach 2:
The patent changes the fiber composition parameter by incorporating hesperaloe fibers at specific proportions (at least 20 weight percent) to achieve the desired balance between cost-effectiveness and physical properties. This parameter adjustment allows optimization of both economic and performance aspects
2Ease of manufacture
If non-wood fibers are used to minimize fiber amount, then cost reduces, but absorbency and wet durability worsen
Solution Approach 1:
The blended composite of hesperaloe and wood fibers creates synergistic effects where hesperaloe fibers provide high absorbency capacity while wood fibers enhance wet durability. This composite structure resolves the contradiction by combining materials that complement each other's strengths
Solution Approach 2:
The patent copies the successful performance characteristics of conventional wood fiber tissues by using hesperaloe fibers blended with wood fibers, achieving comparable or superior absorbency and wet durability without relying on excessive wet strength resins or binders
3Quantity of substance
If hesperaloe fibers replace wood fibers to improve absorbency, then absorbent capacity improves, but bulk and stiffness are negatively affected
Solution Approach 1:
The blended tissue product uses composite materials where hesperaloe fibers (providing high absorbent capacity) are combined with wood fibers (providing bulk). This composite structure allows the tissue to achieve absorbent capacity greater than 7.0 g/g while maintaining satisfactory bulk and stiffness properties
Solution Approach 2:
The patent applies local quality by having different fiber types perform different functions within the same tissue structure. Hesperaloe fibers are positioned to provide absorbency while wood fibers provide structural support and bulk, allowing each component to optimize its local function
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 resulting tissue products exhibit improved absorbency and wet durability while maintaining or improving bulk and stiffness, achieving properties comparable to or better than those made with conventional wood fibers, without the need for excessive wet strength resins or binders.
Implementation Method 1
the consumer needs high absorbent capacity
Implementation Method 2
a CD Wet/Dry ratio greater than about 0.30
Data Source
AI summary
The present invention relates to tissue products comprising high yield hesperaloe fiber having improved wet performance, such as improved absorbency, CD Wet/Dry Ratio and CD Wet Durability. The addition of high yield hesperaloe pulp fibers surprisingly improves the CD Wet/Dry ratio without negatively affecting the absorbency of the tissue product. For example, tissue products of the present invention generally have an Absorbent Capacity greater than about 6.0 g/g, such as from about 8.0 to 8.0 g/g. As such the tissue products are durable when wet, but are still sufficiently absorbent. This balance of absorbency and wet strength is not found in the prior art without resorting to adding latex binders or the like to the tissue product.