Sewing Thread Dyeing with Combined Preparation and Dye Application
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Solution Overview
Problem
Conventional methods for producing dyed sewing threads, especially airbag threads, are economically inefficient due to time-consuming dyeing processes and potential issues with thread adhesion during the dyeing process, leading to costly production downtimes.
Innovation Solution
A method where a mixture of preparation and dye is applied directly to the thread using a dosing system or godet bath, eliminating the need for a dye bath and allowing for a dyebath-free process, with the thread being wound and prepared for sale in a short time, ensuring the thread is ready for use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional dyeing processes are used with separate preparation steps, then uniform and reproducible dyeing is achieved, but production time increases and economic efficiency decreases
Solution Approach 1:
The patent combines the preparation application and dyeing processes into a single integrated step. The preparation and dye are mixed together to form a combined composition that is applied to the thread in one operation, eliminating the need for separate preparation and dyeing steps. This merging of processes significantly reduces production time while maintaining acceptable coloring results for airbag threads where exact uniformity is not critical.
2Reliability
If separate preparation and dyeing processes are used, then thread properties are improved, but production costs increase due to multiple processing steps
Solution Approach 1:
The patent merges the preparation and dyeing processes into a single step by combining the preparation and dye into one composition. This integrated approach reduces the number of processing steps, equipment requirements, and operational complexities, thereby lowering production costs while still delivering threads with improved properties suitable for airbag manufacturing.
3Manufacturing precision
If preparation and dye are applied separately, then precise control of each property is achieved, but process complexity increases
Solution Approach 1:
The patent simplifies the overall process by combining preparation and dye into a single composition that is applied in one step. While this reduces the number of process steps and equipment needed, the patent acknowledges that precise control over individual properties may be slightly reduced. However, for airbag threads where exact uniformity is not critical, this trade-off is acceptable and results in a much simpler, more economical process.
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 approach significantly reduces production time and costs, ensuring the thread is ready for sale quickly and maintaining quality by allowing the color to even out during the sewing process, which is sufficient for airbag threads where uniformity is not critical.
Implementation Method 1
The mixture is applied to the thread by means of a dosing system, in particular by means of a sponge applicator
Implementation Method 2
a sponge applicator, with the thread running through an application area in the dosing system
Implementation Method 3
a mixture of preparation and dye is applied directly to the thread using a dosing system or godet bath
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a method for producing dyed sewing threads, especially airbag threads. According to said method, a preparation improving the thread properties and a dye are applied to the thread, the preparation and the dye being mixed and being applied jointly to the thread as a mixture. The invention also relates e.g. to a sewing thread produced according to said method.