Lyocell filament lining fabric
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Solution Overview
Problem
Lining fabrics made from natural filaments like silk, viscose, cupro, or acetate are not dimensionally stable when washed in a regular laundry machine, requiring dry-cleaning, while synthetic polymers like polyamide or polyester offer stability but lack moisture absorption for comfort.
Innovation Solution
A lining fabric using Lyocell filaments with an average linear density between 0.6 and 4 dtex, ensuring minimal washing shrinkage and high moisture absorption for comfort, and an environmentally friendly manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If natural filaments (silk, viscose, cupro, acetate) are used for lining fabric, then smoothness and moisture absorption are improved, but dimensional stability deteriorates causing considerable shrinkage after washing
Solution Approach 1:
The patent changes the physical parameters of the Lyocell filaments by controlling their linear density (0.6-4 dtex) and incorporating them into yarns with specific constructions (twist levels, ply configurations). This parameter optimization allows the fabric to maintain smoothness and moisture absorption while achieving dimensional stability through the interplay of filament properties and yarn structure during washing.
Solution Approach 2:
The invention uses composite yarn structures combining Lyocell filaments with other fibers or blending Lyocell with different proportions of synthetic or natural fibers. This composite approach allows the lining fabric to inherit the smoothness and hygroscopicity of Lyocell while gaining dimensional stability from the composite structure, resolving the contradiction between comfort and washability.
2Ease of operation
If synthetic polymers (polyamide, polyester) are used for lining fabric, then dimensional stability is improved, but moisture absorption deteriorates reducing wearing comfort
Solution Approach 1:
The patent optimizes the linear density parameter of Lyocell filaments to extremely fine ranges (0.6-4 dtex), which enhances moisture absorption capacity and surface smoothness. By precisely controlling this parameter and combining it with appropriate yarn constructions, the fabric achieves both high wearing comfort through superior hygroscopicity and adequate dimensional stability through the engineered yarn structure.
Solution Approach 2:
The invention creates composite yarns and fabrics that blend Lyocell's superior moisture absorption properties with the dimensional stability of carefully selected companion fibers. The composite structure allows each fiber type to contribute its advantageous properties, achieving both comfort and stability simultaneously.
3Ease of operation
If fine Lyocell filaments (0.6-4 dtex) are used for lining fabric, then smoothness and moisture absorption are improved, but manufacturing complexity increases
Solution Approach 1:
The patent specifies precise parameter ranges for Lyocell filament linear density (0.6-4 dtex) and yarn construction characteristics. By establishing these standardized parameters, the invention simplifies the manufacturing process despite using fine filaments, as the defined ranges provide clear production targets and quality control criteria that reduce manufacturing complexity.
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 Lyocell fabric maintains dimensional stability and comfort through low washing shrinkage, even after multiple washes in a household machine, while being hygroscopic and environmentally friendly.
Implementation Method 1
Yarn made from such fine Lyocell filaments results in a lining fabric which is hygroscopic and thus provides good comfort
Data Source
Figure 1~2
AI summary
The invention relates to a lining fabric (3) for a clothing article (1). In order to provide a lining fabric (3), that is hygroscopic to ensure good wearing comfort, and has sufficient dimensional stability to allow washing in a household laundry machine, the lining fabric (3) according to the invention is made from yarns (6) containing or consisting of Lyocell filaments (7). The Lyocell filaments (7) have an average linear density of less than 1.5 dtex, preferably less than 1.4 dtex and even more preferred, less than 1.3 dtex. The washing shrinkage after five washings is preferably less than 4 % in each of two perpendicular directions.