Process for marking a textile by means of a thermally erasable ink
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Coated textiles face issues with non-uniform coating and altered properties when exposed to temperatures above their melting point, leading to problems during storage, transport, and assembly, as well as challenges in marking visibility for precise positioning.
Innovation Solution
A method using thermo-erasable ink that becomes invisible at temperatures higher than a predetermined disappearance temperature, allowing the mark to reappear at a lower reappearance temperature, enabling detection of excessive heat exposure and facilitating textile assembly by making the mark disappear after welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the coated textile is exposed to temperature higher than the melting temperature of the coating layer, then the coating layer can be used for welding joining, but the coating layer softens or melts and spreads unevenly causing non-uniform coating and altered textile properties
Solution Approach 1:
The patent applies a temperature-sensitive marking system that changes color or becomes invisible when exposed to temperatures above the coating's melting point. This allows operators to visually detect when the coating has been sufficiently heated for welding while preventing overheating that would cause non-uniform spreading. The marking material is specifically selected to change properties at temperatures corresponding to the coating layer's melting temperature.
2Ease of operation
If the mark is made visible after assembly by positioning the second textile to cover the mark, then the mark disappears after assembly, but precise positioning is tricky since the marker is no longer visible
Solution Approach 1:
The patent positions the second textile strip flush with the visible mark before heating occurs. The mark remains visible during the positioning and assembly phase, allowing for precise alignment. Only after the assembly is complete and the textiles are joined does the heating cause the mark to disappear, ensuring both accurate positioning and clean final appearance.
3Manufacturing precision
If the mark is left visible after assembly for aesthetic purposes, then the positioning is easier, but the appearance of the textile is degraded
Solution Approach 1:
The patent employs a temperature-sensitive marking material that is visible at room temperature for easy positioning but becomes invisible when heated to the coating's melting temperature. This automatic color change or disappearance upon heating eliminates the need for manual erasure and ensures the mark does not remain visible to degrade the textile's appearance, while still providing visibility during the assembly process.
4Reliability
If the rolled textile is subjected to temperature higher than the melting temperature of the coating layer during storage or transport, then the textile becomes welded in unwanted places, but it can no longer be unrolled without damaging the textile
Solution Approach 1:
The patent applies temperature-sensitive marking material to the textile before rolling for storage or transport. If the textile is exposed to temperatures above the coating's melting point during storage, the marking changes color or becomes invisible, providing immediate visual warning that unwanted welding has occurred. This allows operators to identify and separate affected textile sections before attempting to unroll, preventing damage while maintaining the coating's sealing capability when properly heated.
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 allows for reliable detection of heat damage and simplifies textile assembly by ensuring the mark is no longer visible after assembly, reducing the risk of incorrect positioning and maintaining the integrity of the coating.
Implementation Method 1
applying an ink absorbing and/or reflecting at least one wavelength in the visible range when it is applied to said textile at a temperature within a predetermined range of use, said ink neither absorbing nor reflecting a wavelength in the visible range if said textile is subjected, at least at the level of said marking, to a temperature greater than or equal to a disappearance temperature
Implementation Method 2
said ink neither absorbing nor reflecting a wavelength in the visible range if said textile is subjected, at least at the level of said marking, to a temperature greater than or equal to a disappearance temperature
Data Source
Figure 1~7
Figure 8~11
AI summary
The invention relates to a process for marking a coated textile, characterised in that the marking is achieved by applying an ink that absorbs and/or reflects at least one wavelength in the visible range when it is applied to the textile at a temperature comprised in a preset use range, the ink neither absorbing nor reflecting any wavelength in the visible range if the textile is subjected, at least in the area presenting the marking, to a temperature higher than or equal to a disappearance temperature, the ink once again absorbing and/or reflecting at least one wavelength in the visible range if the textile is then subjected, at least in the area presenting the marking, to a temperature lower than a reappearance temperature, said reappearance temperature being below the minimum temperature of the preset use range.