Conductive textile and method for fabricating the same
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Solution Overview
Problem
Conductive textiles often exhibit high relative resistance variation when stretched, affecting the performance of wearable electronic devices, which is a critical issue for the textile industry aiming to enhance elasticity and functionality in sportswear.
Innovation Solution
A conductive textile comprising a base cloth with a conductive film made from a polyurethane resin and silver bearing conductors, where the silver content is between 55 to 80 parts by weight and the polyurethane resin content is between 8 to 12 parts by weight, along with a fabricating method involving mixing, coating, and bake-drying, using n-propanol as a solvent to achieve low relative resistance variation and bio-friendliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If general conductive textiles are used, then conductivity is achieved, but relative resistance variation increases when stretched
Solution Approach 1:
The patent uses a composite conductive film comprising polyurethane resin and silver-bearing conductor particles. This composite structure combines the elasticity of polyurethane with the conductivity of silver, achieving both low relative resistance variation (<25%) when stretched to 120% and good conductive functionality. The specific composition ratio (55-80 parts silver-bearing conductor to 8-12 parts polyurethane resin) optimizes the balance between elasticity and conductivity.
2Object-affected harmful factors
If traditional solvents are used in conductive paste, then coating process is achieved, but environmental friendliness deteriorates
Solution Approach 1:
The patent changes the solvent parameter from traditional toxic solvents (such as DMF, toluene) to n-propanol, which is environmentally friendly and bio-compatible. This parameter change maintains the coating process effectiveness while improving environmental friendliness. The n-propanol solvent allows the conductive paste to be properly applied and dried to form the conductive film, achieving both ease of manufacture and environmental sustainability.
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 conductive textile maintains low relative resistance variation (ΔR/R0) of less than 25% when stretched to 120% of its original length, ensuring good conductive functionality and elasticity, while being environmentally friendly and suitable for sportswear applications.
Implementation Method 1
a conductive film made from a polyurethane resin and silver bearing conductors, where the silver content is between 55 to 80 parts by weight and the polyurethane resin content is between 8 to 12 parts by weight
Implementation Method 2
performing a bake-drying step to bake and dry the base cloth undergone the coating step, such that a conductive film is formed on the base cloth
Data Source
AI summary
A conductive textile includes a base cloth and a conductive film disposed on the base cloth. The conductive film includes a polyurethane resin and a silver bearing conductor, in which a content of the silver bearing conductor is 55 parts by weight to 80 parts by weight, and a content of the polyurethane resin is 8 parts by weight to 12 parts by weight.