Method for dyeing and removing colored impurities
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Solution Overview
Problem
Current dyeing methods for polyester fabrics are inefficient and environmentally harmful due to the high water requirement for removing excess dye, leading to significant liquid waste and pollution.
Innovation Solution
A method involving a non-viscous or ductile adsorption material that is applied to the dyed polyester fabric, heated, and then coated onto the colored layer to adsorb impurities, allowing for the removal of the adsorption material without water washing, thereby reducing waste and pollution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional spray dyeing methods are used to dye polyester fabric, then the fabric can be dyed with decorative patterns, but a large amount of water is required to remove excess dye, causing liquid waste and pollution
Solution Approach 1:
The patent extracts the excess dye and colored impurities from the fabric surface by transferring them to a removable transfer sheet through heat pressing. This eliminates the need for water washing while achieving complete removal of excess dye, directly resolving the contradiction between dyeing capability and water consumption.
Solution Approach 2:
The patent changes the physical state and properties of the transfer sheet by controlling temperature and pressure parameters during heat pressing. The transfer sheet transitions from a non-viscous state at room temperature to a softened state under heat and pressure, enabling it to adsorb excess dye, then returns to its original state for removal, eliminating water waste while maintaining dyeing effectiveness.
2Ease of operation
If the adsorption material is applied as a non-viscous or ductile material at room temperature, then it can be easily coated and removed without water washing, but the material must be softened or cured through heating
Solution Approach 1:
The patent changes the physical parameters of the adsorption material by applying heat and pressure during the transfer process. The material transitions from a non-viscous or ductile state at room temperature to a softened state under heat and pressure, enabling easy coating and adsorption, then returns to its original state for simple removal without water washing. The energy consumption is minimal and localized to the pressing area.
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 effectively removes colored impurities from polyester fabrics without water consumption, minimizing liquid waste and pollution, while maintaining the fabric's properties.
Implementation Method 1
the colored impurities in the colored layer are adsorbed by the adsorption material
Implementation Method 2
subjecting the polyester fabric thus dyed to a heating treatment, so that the colored layer adheres to the surface of the polyester fabric
Implementation Method 3
the adsorption material is softened and coated on the colored layer
Data Source
AI summary
Disclosed herein is a method for dyeing and removing colored impurities, which includes providing a polyester fabric and an adsorption material, spraying a coloring material onto a surface of the polyester fabric to form a colored layer, subjecting the polyester fabric thus dyed to a heating treatment for the colored layer to adhere to the surface of the polyester fabric, attaching or applying the adsorption material onto the colored layer and subsequently heating and/or applying a pressure to the adsorption material so that the adsorption material is coated on the colored layer to adsorb colored impurities therefrom, and removing the adsorption material.