High-Frequency Bonding for Down Product Compartment Lines
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Solution Overview
Problem
Existing methods for forming compartment separation lines in down products using seamless bonding or adhering techniques face challenges with adhesiveness, durability, and aesthetic quality, leading to high manufacturing costs and difficulties in mass production.
Innovation Solution
A high-frequency bonding method is employed to form bonding pattern lines on the inner surfaces of fabrics by printing a heat-reactive adhesive, drying it, and then high-frequency heating under compression, which results in excellent adhesiveness and durability while creating a clear and aesthetically pleasing pattern line on the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sewing lines are used to form compartment walls, then down compartments can be formed to prevent down from moving, but sewing holes cause down to come out and moisture to enter
Solution Approach 1:
The invention removes the harmful sewing holes entirely by replacing the sewing method with a seamless high-frequency bonding method. The inner and outer fabrics are bonded directly without needles, eliminating the pathway for down leakage and moisture penetration while maintaining compartment formation functionality.
Solution Approach 2:
The invention replaces the mechanical sewing system (needles, threads, sewing machines) with a high-frequency bonding system that uses dielectric heating. This substitution eliminates mechanical penetration of the fabric while achieving the same compartment wall formation purpose.
2Object-affected harmful factors
If conventional bonding methods are used to form compartment separation lines, then sewing holes are eliminated, but adhesiveness and durability are insufficient
Solution Approach 1:
The invention changes the bonding parameters by using high-frequency dielectric heating instead of conventional thermal or adhesive bonding. This parameter change enables rapid heating and bonding with superior adhesion strength, achieving both hole-free construction and reliable bonding durability simultaneously.
Solution Approach 2:
The high-frequency bonding process uses periodic electromagnetic energy delivery to heat and bond the fabrics. This periodic action allows precise control of the bonding process, ensuring adequate adhesion strength while maintaining the hole-free advantage.
3Object-affected harmful factors
If conventional bonding methods are used, then sewing holes are avoided, but pattern line finishing is unclear and aesthetic quality is poor
Solution Approach 1:
The invention applies local quality by creating a distinct pattern line through high-frequency bonding that differs in appearance from the surrounding fabric. The bonding process creates a visible but aesthetically pleasing pattern line that provides clear compartment separation while maintaining overall fabric appearance quality.
4Reliability
If sewing methods are used to form compartments, then down compartments can be created, but manufacturing cost increases due to the sewing process
Solution Approach 1:
The invention replaces the expensive and time-consuming mechanical sewing process with a more efficient high-frequency bonding process. This substitution reduces manufacturing cost while maintaining the ability to form reliable down compartments, as the bonding process is faster and requires less manual intervention.
5Object-affected harmful factors
If seamless bonding methods are used, then sewing holes are eliminated, but mass production is difficult and manufacturing cost increases
Solution Approach 1:
The high-frequency bonding system is inherently more suitable for automation and mass production compared to sewing systems. The process can be easily integrated into continuous production lines, enabling seamless bonding to achieve both hole-free construction and high productivity for mass production.
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
This method enables the production of down products with bonding pattern lines that have excellent adhesiveness and durability, along with clear and well-finished pattern lines, facilitating mechanized and automated mass production while reducing manufacturing costs.
Implementation Method 1
heating and pressing the fabrics by means of a high-frequency bonding technique to bond the fabrics
Implementation Method 2
drying the adhesive
Data Source
Figure 1~1c
Figure 2
Figure 3
AI summary
The present invention can manufacture a down product comprising at least one bonding pattern line for the compartment separation without forming sewing holes by a process comprising: printing and drying a heat-reactive adhesive on the inner surface of an inner fabric, an optional mesh material and/or an outer fabric in a predetermined pattern, laminating said inner fabric, optional mesh material and/or outer fabric, and then high-frequency heating them under pressing with a pressing pattern the same as the printing pattern to bond the inner fabric, optional mesh material and outer fabric. Since the present invention manufactures a double fabric by employing a high-frequency bonding manner in which a heat-reactive adhesive is used and/or a pre-bonding post-cutting manner in which firstly a double fabric is manufactured by forming a compartment separation line and secondly the double fabric is subjected to a cutting process, it is possible to manufacture a down product having a bonding pattern line which is composed of a bonding line with excellent adhesiveness and durability and an aesthetically excellent pattern line with a good clearness and finishing quality as well as to achieve a mass production of down products by mechanization and automation.