High-Frequency Bonding Pattern Lines for Double-Layer Down Fabric
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Solution Overview
Problem
Existing methods for manufacturing down products with non-sewing compartmentalization face issues such as inadequate bonding strength, damage to fabrics, poor pattern finishing, and moisture penetration, particularly when using high-frequency bonding and adhesive injection techniques.
Innovation Solution
A device comprising a printing means for applying an adhesive in a predetermined pattern, a drying means to fix the adhesive, and a high-frequency bonding means with a matching pressing pattern, allowing for precise alignment and bonding of fabrics without sewing, ensuring strong adhesion and clear pattern lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive injection and high-frequency bonding are used for non-sewing compartmentalization, then bonding strength is improved, but fabric damage and moisture penetration occur
Solution Approach 1:
The bonding process is segmented into three distinct stages: adhesive application, drying/setting, and high-frequency bonding. This segmentation allows each stage to be optimized independently, preventing fabric damage by ensuring adhesive is properly set before bonding heat is applied.
Solution Approach 2:
The adhesive is applied and allowed to dry or set before the high-frequency bonding process. This preliminary action ensures the adhesive reaches optimal bonding state, preventing fabric damage from premature heating while ensuring strong adhesion when bonding occurs.
2Productivity
If adhesive is applied and immediately laminated without drying, then productivity is improved, but adhesive smearing and transfer occur
Solution Approach 1:
The adhesive is applied and allowed to dry or set partially before the lamination step. This preliminary drying action prevents adhesive smearing and transfer during lamination while maintaining efficient production flow through the integrated device.
Solution Approach 2:
The device enables continuous production by having multiple components (adhesive application, drying, lamination, bonding) operating in sequence without interruption. The drying and lamination occur simultaneously in different zones, maintaining continuous useful action throughout the process.
3Device complexity
If bonding is achieved by simple contact and lamination followed by drying, then device complexity is reduced, but adhesion strength becomes deficient
Solution Approach 1:
The simple mechanical contact and drying process is enhanced by introducing high-frequency bonding technology. This substitution provides superior adhesion strength through dielectric heating that activates and cures the adhesive more effectively than simple drying alone.
Solution Approach 2:
The bonding process utilizes parameter changes in temperature and energy input through high-frequency electromagnetic fields. This transforms the adhesive from a simple dried state to a fully cured bonded state, significantly improving adhesion strength without requiring complex multi-step processes.
4Device complexity
If high-frequency bonding is applied without pattern alignment, then device complexity is reduced, but pattern line finishing quality deteriorates
Solution Approach 1:
The pressing means serves multiple functions: it applies pressure for bonding, creates the surface pattern through its protrusion design, and ensures pattern alignment between adhesive and fabric. This multi-functionality achieves high pattern quality without requiring separate alignment systems.
Solution Approach 2:
The pressing means with its predetermined protrusion pattern automatically ensures pattern alignment during the bonding process. The design itself provides the alignment function through its structure, eliminating the need for additional alignment mechanisms while maintaining high pattern line finishing quality.
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
Enables mass production of down products with compartments that have excellent bonding line adhesiveness and durability, clear surface patterns, and superior finishing quality, eliminating issues of fabric damage and moisture ingress.
Implementation Method 1
a high-frequency bonding means provided with a pressing means on which a protrusion having a predetermined pressing pattern is formed and which bonds the inner fabric and the outer fabric by pressing and heating with the pressing means; wherein said printing pattern and said pressing pattern are the same
Data Source
AI summary
A device for preparation of double fabric for down products comprises a printing means that can print an adhesive in a predetermined printing pattern on fabric; a drying means that can dry or fix the adhesive; a laminating means that can stack and laminate the fabrics on which an adhesive is printed; and a bonding means that can bond the fabrics with a cured adhesive by pressing with a predetermined pressing means and high-frequency heating to cure the adhesive; wherein said printing pattern and the pressing pattern are the same in pattern (shape), can be overlapped on the basis of the center line and have a difference in size (width) of 20% or less. Consequently, double fabric for down products thus manufactured has an excellent adhesiveness and durability and an aesthetically excellent pattern line with good clearness and finishing quality.