Method for producing clothing or bedding, and clothing or bedding
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Solution Overview
Problem
Existing clothing and bedding products using water-soluble polyvinyl alcohol-based sewing threads are prone to dissolution in high-temperature and high-humidity environments, leading to fragility and loss of structural integrity.
Innovation Solution
A manufacturing method using a water-insoluble upper thread (cotton, silk, or chemical fiber) and a water-soluble lower thread (polyvinyl alcohol-based) with a specific twisting ratio of 94% to 108% is employed, ensuring robust joining in high-temperature and high-humidity conditions while allowing easy disassembly by dissolving the lower thread in moisture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a water-soluble polyvinyl alcohol-based sewing thread is used, then the sewn product can be easily disassembled by dissolving the thread in warm water or alkaline solution, but the sewing thread may dissolve in high-temperature and high-humidity environments during use, causing the sewn product to become fragile
Solution Approach 1:
The sewing thread is divided into two distinct parts with different properties: the upper thread uses water-insoluble fibers (cotton, silk, or chemical fibers) to maintain structural integrity during use, while the lower thread uses water-soluble polyvinyl alcohol fibers that can be dissolved for easy disassembly. This segmentation allows each part to fulfill its specific function without compromising the other.
Solution Approach 2:
Different portions of the sewing thread are assigned different functional qualities based on their location and purpose. The upper thread (exposed to the front) is made water-insoluble for durability, while the lower thread (exposed to the back) is made water-soluble for disassembly convenience. This local differentiation resolves the contradiction between reliability and ease of manufacture.
2Reliability
If the upper thread is made water-insoluble to maintain strength in humid environments, then structural integrity is ensured, but the ease of disassembly into individual components is reduced
Solution Approach 1:
The sewing thread is divided into two distinct parts with different properties: the upper thread uses water-insoluble fibers (cotton, silk, or chemical fibers) to maintain structural integrity during use, while the lower thread uses water-soluble polyvinyl alcohol fibers that can be dissolved for easy disassembly. This segmentation allows each part to fulfill its specific function without compromising the other.
Solution Approach 2:
Different portions of the sewing thread are assigned different functional qualities based on their location and purpose. The upper thread (exposed to the front) is made water-insoluble for durability, while the lower thread (exposed to the back) is made water-soluble for disassembly convenience. This local differentiation resolves the contradiction between reliability and ease of manufacture.
3Ease of manufacture
If the twisting ratio of upper twisting to lower twisting is outside the 94%-108% range, then the sewing thread may be easier to manufacture, but the sewing thread strength and suitability as a sewing machine thread are compromised
Solution Approach 1:
The patent specifies a precise parameter range (94%-108% ratio of upper to lower twisting) for optimizing the sewing thread's mechanical properties. This parameter control ensures that the composite thread maintains adequate strength and suitability for sewing machine operation while still allowing for manufacturing within this defined range.
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 method maintains the structural integrity of clothing and bedding in humid environments through insoluble upper threads while enabling easy disassembly into individual components by dissolving the lower threads, thus preserving the fabric's strength and facilitating recycling.
Implementation Method 1
as the lower thread, a water-soluble sewing thread using polyvinyl alcohol as a raw material is used
Implementation Method 2
the lower thread is obtained by performing twisting processing on a thread formed of a water-soluble polyvinyl alcohol fiber by a solvent wet cooling gel spinning method
Data Source
Figure 1
Figure 2
Figure 3A~3C
AI summary
Provided is a manufacturing method for clothing or bedding, and clothing or bedding, which have both strength in use in a high-temperature and high-humidity environment and ease of disassembly into each portion. The manufacturing method for clothing or bedding according to the present invention, includes: manufacturing clothing or bedding (1) with a sewing machine using an upper thread (2) and a lower thread (3), in which as the upper thread (2), a water-insoluble sewing thread formed of cotton, silk, a chemical fiber, or a blended fiber is used, as the lower thread (3), a water-soluble sewing thread using polyvinyl alcohol as a raw material is used.