Microalgae Tissue Products Using Ionic Retention Aids
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The pulp and paper industry faces challenges in using microalgae in tissue products due to the small size of microalgae particles, which limits their retention in fiber sheets and results in lower strength and quality, particularly in low basis weight paper products like tissue.
Innovation Solution
Incorporating a blend of conventional papermaking fibers with microalgae and using an ionic retention aid, preferably a cationic retention aid, along with a flocculating agent to agglomerate the microalgae, which helps retain them within the tissue sheet without compromising properties like caliper, bulk, air permeability, and absorbent capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If microalgae particles are incorporated into tissue products, then environmental sustainability and bulk are improved, but retention in fiber sheets deteriorates due to small particle size
Solution Approach 1:
The patent employs retention aids as intermediary substances that bridge the gap between small microalgae particles and the fiber sheet matrix. These retention aids adsorb onto microalgae surfaces and provide anchoring points that prevent particle washout during papermaking processing, thereby improving retention without requiring changes to the microalgae particles themselves.
Solution Approach 2:
The patent creates a composite structure where microalgae particles are combined with fiber materials and bonding agents. This composite approach allows the small microalgae particles to be embedded within a matrix of fibers and binders, providing physical retention mechanisms that overcome the inherent limitation of small particle size.
2Reliability
If microalgae particles are incorporated into tissue products, then environmental sustainability is improved, but strength and quality deteriorate
Solution Approach 1:
The patent optimizes multiple parameters including microalgae particle size distribution, concentration levels, retention aid dosage, and processing conditions. By carefully controlling these parameters, the patent achieves a balance where sufficient microalgae are retained in the sheet to provide environmental benefits while maintaining adequate strength and quality characteristics for tissue applications.
Solution Approach 2:
The patent develops a composite material system where microalgae particles are integrated with conventional fiber materials through chemical and physical bonding mechanisms. This composite structure allows the microalgae to contribute to sustainability goals while the fiber matrix and bonding agents maintain the mechanical strength and quality required for tissue products.
3Reliability
If microalgae particles are incorporated into low basis weight tissue products, then environmental sustainability is improved, but retention and quality deteriorate more severely
Solution Approach 1:
The patent implements specialized parameter optimization for low basis weight applications, including adjusted retention aid dosages, controlled microalgae concentration levels, and optimized processing conditions. These parameter changes ensure that even in thin tissue products where retention challenges are amplified, sufficient microalgae are retained while maintaining the high quality and aesthetic characteristics expected of low basis weight tissue.
Solution Approach 2:
The patent uses retention aids as critical intermediary substances that are particularly important in low basis weight tissue products. These retention aids provide enhanced anchoring mechanisms that are necessary when the overall sheet mass is low, ensuring that microalgae particles remain retained despite the reduced buffer capacity compared to heavier tissue products.
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 approach effectively increases the retention of microalgae in tissue products, enhancing bulk and water retention while maintaining tissue properties, making it suitable for applications like bath tissue and paper towels.
Implementation Method 1
use of an ionic retention aid, preferably a cationic retention aid, in the process of making tissue substrates helps to provide a tissue sheet retaining the microalgae
Implementation Method 2
use of a flocculating agent may agglomerate the microalgae and make it easier to retain the microalgae within the tissue sheet
Data Source
AI summary
Dry products, and particularly dry tissue substrates, including a blend of conventional papermaking fibers and microalgae are disclosed herein. Use of a cationic retention aid in the dry tissue substrates helps to provide a tissue sheet retaining the microalgae without being detrimental to tissue properties such as caliper, bulk, air permeability, slough and absorbent capacity. Additionally, use of a flocculating agent may agglomerate the microalgae and make it easier to retain the microalgae within the tissue sheet.