Unbleached Eucalyptus Globulus Pulp for Tissue Bulk, Strength, and Absorbency
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Solution Overview
Problem
Existing tissue paper products lack a balanced combination of bulk, absorbency, capillarity, strength, softness, and consumer-friendly visual appearance, while also requiring high chemical and water consumption in production, which is not environmentally sustainable.
Innovation Solution
Incorporating unbleached Eucalyptus globulus Kraft fibers pulp with specific fiber characteristics into tissue paper production processes, utilizing existing industrial methods to enhance paper properties and reduce environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If bleached pulp is used to improve visual appearance (whiteness), then consumer-friendly visual appearance is improved, but chemical consumption and environmental impact increase
Solution Approach 1:
The invention extracts and removes the bleaching process from the pulp production chain, using unbleached Eucalyptus globulus Kraft pulp that maintains its natural color. This eliminates the need for chemical bleaching agents while still achieving consumer acceptance through the natural brownish appearance that conveys an eco-friendly image.
Solution Approach 2:
The invention uses unbleached pulp that is less processed and requires fewer chemical treatments, effectively using a 'simpler' material state that reduces chemical consumption. The natural unbleached state serves as a marketing advantage for environmentally conscious consumers.
2Strength
If traditional tissue paper formulations are used to achieve adequate strength, then tensile strength is maintained, but bulk and absorbency properties are compromised
Solution Approach 1:
The invention changes the fundamental parameter of fiber selection to Eucalyptus globulus Kraft fibers, which possess inherent superior properties including length (1.2-2.0mm), coarseness (4-8 mg/100m), and lumen diameter (15-25 μm). These parameter changes naturally deliver enhanced bulk, absorbency, and tensile strength simultaneously without requiring complex formulations.
Solution Approach 2:
The invention creates a composite tissue structure by combining unbleached Eucalyptus globulus Kraft fibers with other cellulose fibers in specific ratios (30-70% Eucalyptus fibers). This composite approach leverages the superior mechanical properties of Eucalyptus fibers to enhance overall paper performance across multiple parameters.
3Productivity
If conventional tissue paper production processes are used to achieve basic functionality, then production costs are controlled, but water consumption and environmental impact increase
Solution Approach 1:
The invention extracts and eliminates the bleaching stage from the conventional pulp production sequence. By using unbleached Eucalyptus globulus Kraft pulp directly from the kraft process, water-intensive bleaching operations are removed, reducing overall water consumption and chemical usage while maintaining production efficiency.
4Strength
If softwood fibers are used to improve tensile strength and bulk, then mechanical properties are enhanced, but absorbency and capillarity are reduced
Solution Approach 1:
The invention changes from softwood fibers to Eucalyptus globulus hardwood fibers, which have different dimensional parameters including shorter length (1.2-2.0mm vs. longer softwood fibers), finer coarseness (4-8 mg/100m), and appropriate lumen diameter (15-25 μm). These parameter changes provide an optimal balance between mechanical strength and fluid absorption capabilities.
Data Source
AI summary
The present invention relates to a semi-bleached or unbleached Eucalyptus globulus pulp, the use of which for the production of tissue products allows the development of key properties of such products, such as bulk, strength, absorption, softness and even of a visual perception for consumers of sustainable and environmentally friendly products. The invention disclosed herein also includes the use of semi-bleached or unbleached Eucalyptus globulus pulp for the production of tissue products, tissue paper sheets incorporating semi-bleached or unbleached Eucalyptus globulus pulp and their use for the production of toilet paper, napkins and kitchen rolls.