3D Knitted Fabric Shape-Anchoring Layer for Scratch Resistance
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Solution Overview
Problem
Existing three-dimensional knitted fabrics lack sufficient scratch resistance, Taber abrasion resistance, and stability against deformation due to elongation under tensile load, especially in harsh conditions such as those encountered with hook-and-loop fasteners.
Innovation Solution
A three-dimensional knitted fabric design comprising a front layer, a back layer, and a shape-anchoring layer with knit loops at the same locations as the front layer, where the shape-anchoring layer reduces stitch deformation by anchoring the knit loops, and the fabric has a density of 30-64 course/inch, with a percentage of front layer loops to shape-anchoring layer loops greater than 80%, and includes heat-fusible yarn for enhanced resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the knitted fabric density is increased to improve scratch resistance and Taber abrasion resistance, then the durability against rubbing is improved, but the air permeability decreases and the tactile sensation becomes less comfortable
Solution Approach 1:
The patent applies local quality by creating a shape-anchoring layer with knit loops at specific locations that correspond to the front layer loops, providing localized reinforcement only where needed for scratch and abrasion resistance while maintaining mesh structure and air permeability in other areas. This selective reinforcement allows the fabric to achieve high durability without uniformly increasing density across the entire fabric.
2Reliability
If the knitted fabric is made denser to improve scratch resistance, then the durability against hook-and-loop fastener rubbing is improved, but the deformation under tensile load increases
Solution Approach 1:
The shape-anchoring layer is knitted in advance with loops positioned at the same locations as the front layer loops, creating pre-established anchor points that prevent pattern deformation before tensile loading occurs. This preliminary structural arrangement ensures that when tensile loads are applied during sheet setting or use, the knit loops are already constrained by the anchoring layer, reducing stitch deformation and maintaining pattern stability.
3Stability of the object's composition
If reinforcing yarn is knitted into mesh openings to stabilize mesh form, then the mesh stability is improved, but the scratch resistance and Taber abrasion resistance are not sufficient under harsh conditions
Solution Approach 1:
The patent transitions from two-dimensional mesh reinforcement to a three-dimensional structure by introducing a shape-anchoring layer that extends into the thickness direction of the fabric. This third dimension allows the anchoring loops to engage with and constrain the front layer loops from behind, providing comprehensive reinforcement that simultaneously stabilizes mesh form and resists scratch and abrasion forces applied to the fabric surface.
Data Source
AI summary
Provided are: a three-dimensional knitted fabric that is inhibited from collapsing due to excessive elongation when a tensile load is applied during seat installation, etc., and that has Taber abrasion resistance and scratch resistance according to ASTM; and a vehicle interior material that includes the three-dimensional knitted fabric. The present invention relates to a three-dimensional knitted fabric including a front layer knitted fabric, a back layer knitted fabric, and a connecting thread that connects the front layer knitted fabric and the back layer knitted fabric, the three-dimensional knitted fabric characterized in that the front layer knitted fabric includes a front surface layer positioned on the outermost side of the three-dimensional knitted fabric and a shape-fixing layer that is positioned farther inward in the three-dimensional knitted fabric than the front surface layer and that includes knit loops formed at the same positions as knit loops included in the front surface layer, the knitted fabric density after finishing is 30 to 64 courses/inch inclusive, and the ratio (A) of the number of knit loops included in the front surface layer to the number of knit loops included in the shape-fixing layer is more than 80% and 100% or less. The present invention also relates to a vehicle interior material that includes said three-dimensional knitted fabric.