Warp-Knitted Fabric Shielding via Three-Guide Bar Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Advertising fabrics require high shielding performance to prevent spotty light leakage when used with background lighting, but existing methods involve environmentally unfriendly coatings that compromise the fabric's quality and performance.
Innovation Solution
A method involving yarn selection with a denier range of 15 D to 50 D, warp-knitting using three guide bars with polyester textured and filament yarns, jet dyeing, and Stenter setting to create a fabric with enhanced shielding performance without the need for coatings, achieving a smooth and compact surface for effective light blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coating treatment is applied to enhance shielding performance, then shielding performance is improved, but environmental friendliness deteriorates and fabric quality is compromised
Solution Approach 1:
The patent removes the coating layer entirely and achieves shielding performance through the fabric's internal knit structure alone. The three-guide bar warp knitting creates a compact surface that blocks light without requiring any coating treatment, thus eliminating environmental pollution from coating substances.
Solution Approach 2:
The fabric's own knit structure provides the shielding function that previously required an external coating. The intricate three-guide bar knitting pattern creates a self-sufficient light-blocking mechanism embedded in the fabric itself, eliminating the need for separate coating applications.
2Reliability
If yarn denier is increased to improve shielding performance, then shielding performance is improved, but fabric weight increases and anti-wrinkle performance deteriorates
Solution Approach 1:
The patent applies different yarn types (textured vs. filament polyester) to different guide bars to achieve localized functional optimization. The textured yarns provide bulk and light scattering in specific areas, while filament yarns provide smooth surfaces, creating high shielding performance without uniformly increasing overall yarn thickness.
Solution Approach 2:
The patent uses a composite yarn system combining textured polyester and filament polyester in a three-guide bar construction. This composite approach achieves superior shielding performance through the interaction of different yarn characteristics rather than simply increasing the denier of a single yarn type.
3Manufacturing precision
If coating treatment is applied to ensure uniform photopermeability, then photopermeability uniformity is improved, but fabric quality and environmental friendliness deteriorate
Solution Approach 1:
The patent removes the coating layer that previously provided uniform photopermeability and replaces it with a structurally engineered knit surface. The three-guide bar warp knitting creates inherent uniformity in light transmission characteristics through consistent stitch formation and surface compactness without any coating.
4Reliability
If fabric weight is increased to improve shielding performance, then shielding performance is improved, but stiffness increases and anti-wrinkle performance deteriorates
Solution Approach 1:
The patent creates local variations in yarn structure and knit density to achieve shielding performance without uniformly increasing fabric weight. The textured yarns provide localized bulk for light scattering, while the overall fabric structure maintains lightness and flexibility through the three-guide bar construction.
Data Source
AI summary
A fabric with high shielding performance and a preparation method thereof are provided. The method includes: (1) selecting a polyester textured yarn with a denier ranging from 15 D to 50 D and a polyester filament yarn with a denier ranging from 15 D to 50 D as the yarns; (2) using three guide bars for knitting in a warp knitting machine; yarn lapping movement the first guide bar and the second guide bar use the polyester textured yarn, the first guide bar and the second guide bar knit with a modified warp plain fabric structure, the third guide bar uses the polyester filament yarns, and the third guide bar knits with a chain-stitch fabric structure; (3) jet dyeing performing a direct dyeing treatment on greige by a jet dyeing machine; and (4) carrying out a Stenter setting on a setting machine.