Flat textile structure with coating
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Solution Overview
Problem
Existing coated textiles face issues with environmental compatibility due to toxic decomposition products from PVC coatings and complex processing methods with polyolefins, limiting their adaptability and usability.
Innovation Solution
A textile fabric with a woven support layer of polyethylene and/or polyester fibers coated with a polymer blend containing at least 40 wt.% polyethylene-vinyl acetate, which enhances processing ease, weather resistance, and adaptability, allowing for high-frequency welding and improved lacquering capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If PVC is used as coating material, then good processability and adaptability are achieved, but toxic decomposition products are produced during incineration or disposal
Solution Approach 1:
The patent changes the chemical composition parameters of the coating material from PVC to a polyolefin-based polymer blend, specifically using polyethylene and polyethylene-vinyl acetate copolymer in a controlled ratio (20-80 wt% and 80-20 wt% respectively). This parameter change eliminates toxic decomposition products while maintaining processability through careful selection of polymer blend composition
Solution Approach 2:
The patent creates a composite coating material by blending polyethylene and polyethylene-vinyl acetate copolymer in specific proportions. This composite approach combines the advantages of both polymers: polyethylene provides chemical resistance and processability, while polyethylene-vinyl acetate copolymer improves adhesion and reduces toxicity, achieving a balance between ease of manufacture and environmental compatibility
2Object-generated harmful factors
If polyolefins are used as coating material, then environmental compatibility is improved, but processing methods become very complex
Solution Approach 1:
The patent optimizes the compositional parameters of the polyolefin blend, specifically controlling the ratio of polyethylene to polyethylene-vinyl acetate copolymer (20-80 wt% and 80-20 wt%). This parameter optimization ensures the coating maintains good processability comparable to PVC while achieving superior environmental compatibility, eliminating the need for complex processing methods
Solution Approach 2:
The patent applies different functional properties to different components of the polymer blend at the molecular level: polyethylene provides base properties of chemical resistance and processability, while polyethylene-vinyl acetate copolymer contributes adhesion enhancement and environmental compatibility. This local quality differentiation within the composite enables simplified processing while maintaining ecological benefits
3Object-generated harmful factors
If pure PE coating material is used, then environmental compatibility is achieved, but adhesion of lacquers is poor or nonexistent
Solution Approach 1:
The patent develops a composite polymer blend where polyethylene (providing environmental compatibility) is combined with polyethylene-vinyl acetate copolymer (providing adhesion properties). The synergistic interaction between these two components creates a coating that simultaneously achieves good lacquer adhesion and environmental compatibility, overcoming the limitations of pure PE
Solution Approach 2:
The polyethylene-vinyl acetate copolymer acts as an intermediary component that bridges the gap between polyethylene and lacquer materials. It provides functional groups that enhance adhesion while maintaining the overall environmental compatibility of the polyolefin-based coating system
Data Source
AI summary
A textile fabric with a woven support layer including at least polyethylene and/or polyester fibres. A surface coating is applied onto at least one surface of the support layer, and the surface coating includes at least one polymer blend. The polymer blend has at least one mixture of polyethylene and polyethylene-vinyl acetate, and the polymer blend has more than 40 wt. % of polyethylene-vinyl acetate, based on the total weight of the polymer blend.