Layered Textile Fabric Coating for Stain and Liquid Resistance
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Solution Overview
Problem
Textile fabrics used in interior applications face challenges with stain and liquid resistance due to their open construction and absorption properties, leading to difficult cleaning and unsanitary conditions in public places, as conventional stain-resistant coatings are not effective in preventing stains and liquid penetration.
Innovation Solution
A textile fabric sheet is developed with a polyurethane skin layer, an aqueous acrylic coating layer, and a stain-resistant coating layer sequentially applied to provide excellent stain, liquid, and wear resistance, while maintaining a true textile feel, using a method that includes knife-coating and drying these layers on a fabric substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple stain-resistant coating is applied on the surface of textile fabric, then the fabric gains some stain resistance, but the resistance effect is limited and stains can still penetrate through the open construction
Solution Approach 1:
The patent applies a composite coating system consisting of multiple layers: a polyurethane skin layer providing a solid barrier base, an acrylic coating layer for additional protection, and a stain-resistant coating layer for enhanced stain resistance. This multi-layer composite structure prevents liquid penetration while maintaining textile appearance and feel.
Solution Approach 2:
The coating system is segmented into distinct functional layers: the polyurethane skin layer forms a continuous barrier matrix, the acrylic layer provides intermediate protection and adhesion, and the stain-resistant layer offers surface-level stain resistance. Each layer performs its specific function to collectively prevent stain penetration.
2Reliability
If conventional stain-resistant coating is applied on textile fabric, then some stain resistance is achieved, but the fabric loses wear resistance and liquid barrier characteristics
Solution Approach 1:
The polyurethane skin layer provides a durable, wear-resistant barrier with excellent mechanical properties, while the acrylic and stain-resistant layers provide chemical resistance and stain protection. The composite structure ensures both wear resistance and stain resistance are maintained simultaneously.
Solution Approach 2:
Different layers are designed with specific local properties: the polyurethane skin layer provides mechanical strength and wear resistance, the acrylic layer provides adhesion and flexibility, and the stain-resistant layer provides chemical resistance. Each layer's properties are optimized for its specific function.
3Ease of operation
If textile fabric with open construction is used, then the fabric maintains good breathability and textile feel, but stains and liquids easily penetrate through the fabric
Solution Approach 1:
The polyurethane skin layer forms a flexible, continuous thin film barrier on the fabric surface that prevents liquid penetration while maintaining the fabric's flexibility and textile appearance. The coating conforms to the fabric structure without compromising comfort or feel.
Solution Approach 2:
The multi-layer coating system provides a protective barrier that prevents stain penetration while maintaining the underlying fabric's breathability and textile characteristics. The coating layers are designed to be sufficiently thin and flexible to preserve the fabric's inherent properties.
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 resulting fabric sheet exhibits improved stain resistance, preventing liquid penetration and easy cleaning, eliminating the need for a separate moisture barrier, and demonstrating enhanced wear resistance and water repellency, making it suitable for furniture and interior surfaces.
Implementation Method 1
a first polyurethane coating layer formed on the first surface of the fabric substrate
Implementation Method 2
a second aqueous acrylic coating layer formed on the first polyurethane coating layer
Implementation Method 3
a third stain-resistant coating layer formed on the second aqueous acrylic coating layer
Implementation Method 4
knife-coating a polyurethane coating composition on a first surface of the fabric substrate at least once and drying the composition
Data Source
AI summary
Provided are a textile fabric sheet having stain and liquid resistance including (a) a fabric substrate, (b) a first polyurethane coating layer formed on a first surface of the fabric substrate; (c) a second aqueous acrylic coating layer formed on the first coating layer of the polyurethane coating layer; and (d) a third stain-resistant coating layer formed on the second aqueous acrylic coating layer and a method of preparing the same. Thus, a texture characteristic of the fabric substrate itself can be exhibited, and due to the polyurethane coating layer, the aqueous acrylic coating layer and the stain-resistant coating layer stacked in three steps, excellent water resistance, stain resistance and air permeability can be exhibited.