Cellulose Nonwoven Fabric Compaction for Dry Transparency
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Solution Overview
Problem
Cellulose fiber nonwoven fabrics face challenges in maintaining designability and transparency when dry, as existing methods either lack flexibility or result in opaque patterns due to heat embossing, which complicates achieving a superior appearance.
Innovation Solution
A cellulose fiber nonwoven fabric with compacted and non-compacted parts, where the percentage of recesses is between 9 to 25%, transverse rupture strength is at least 15 N, and basis weight is 30 g/m2 to 110 g/m2, allowing for high transmittance and designability, especially when dry, without the use of a binder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If heat embossing is performed on cellulose fiber nonwoven fabric, then designability is improved, but transparency when dry deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the percentage of recesses (9-25%) and basis weight (30-110 g/m2) to achieve optimal balance between designability and transparency. By adjusting these parameters, the compacted parts maintain sufficient light transmission (3-25% transmittance) while preserving pattern visibility, resolving the contradiction between shape modification and transparency maintenance.
2Strength
If multiple air-laid nonwoven fabric layers are laminated and heat fused, then strength is improved, but flexibility deteriorates
Solution Approach 1:
The patent applies local quality by creating compacted parts with localized heat embossing rather than uniformly fusing the entire fabric. This localized approach concentrates bonding in specific pattern areas while leaving other regions loose and flexible, achieving both improved strength at critical points and maintained overall fabric flexibility.
3Productivity
If fabric weight and thickness are increased to improve wiping efficiency, then wiping efficiency is improved, but transparency when dry deteriorates
Solution Approach 1:
The patent applies local quality by creating distinct compacted parts with different optical properties within the same fabric. The compacted portions provide the necessary weight and wiping efficiency, while the non-compacted portions maintain transparency when dry, allowing the fabric to satisfy both requirements simultaneously through spatial differentiation.
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 fabric achieves high designability and visual differentiation between compacted and non-compacted parts, maintaining transparency and strength, enabling effective pattern visibility even when dry, suitable for applications like beauty face masks and cosmetic products.
Implementation Method 1
a transmittance of the compacted parts when dry is 3 to 25%
Data Source
AI summary
Provided is a cellulose fiber nonwoven fabric with compacted parts that is beautiful even when dry. The cellulose fiber nonwoven fabric is characterized in that: the fabric has compacted parts; the percentage of recesses due to the compacting is 9-25%; the transverse rupture strength is at least 15 N; the transmittance of the compacted parts when dry is 3-25%; and the fabric weight is 30 g/m2 to 110 g/m2.