Lightweight Knit Textile Layer for Hook-and-Loop Grinding Devices
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Solution Overview
Problem
Existing grinding devices for hook-loop type Velcro fasteners require heavy materials or roughened textiles, leading to material wastage and complex production processes, especially when adhesive penetration compromises loop functionality.
Innovation Solution
Development of textile layers with a basis weight of 75 g/m2 or less, featuring yarns in longitudinally extending ribs and transversely extending rows, and a stitch pattern of loops and ribs, allowing for reliable loop formation and adhesive bonding without excessive material use, enabling a planar connection with a top layer containing abrasives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heavy materials or roughened textiles are used for the textile layer, then loop functionality and adhesive bonding reliability are improved, but material usage and production complexity increase
Solution Approach 1:
The patent changes the basis weight parameter of the textile layer from traditional heavy materials (>75 g/m²) to lightweight materials (≤75 g/m²), achieving both material savings and sufficient loop functionality through optimized knit structure parameters including loop density, stitch pattern, and yarn selection
Solution Approach 2:
The patent creates a composite structure combining a lightweight knit textile layer with specific adhesive formulations and abrasive particles, where the composite achieves sufficient bonding strength and loop functionality without requiring heavy individual components
2Strength
If adhesive is applied to bond the top layer to the textile layer, then connection strength is improved, but adhesive penetration through the textile layer compromises loop functionality
Solution Approach 1:
The patent applies local quality by creating regions of different adhesive application - applying adhesive primarily to the back surface of the knit layer and at specific locations rather than uniformly throughout, ensuring strong bonding while preserving loop functionality in critical areas
Solution Approach 2:
The patent utilizes the porous knit structure of the textile layer as a controlled barrier, where the interstices between loops and stitches provide sufficient porosity for breathability and flexibility while limiting excessive adhesive penetration that would compromise loop functionality
3Reliability
If a roughening operation is performed on the textile to create loops, then loop formation is achieved, but production complexity and processing steps increase
Solution Approach 1:
The patent applies preliminary action by forming the loop structure directly into the knit textile layer during the knitting process itself, rather than performing subsequent roughening operations. The knit structure is designed with loop-forming stitches that create the required surface geometry in one step
Solution Approach 2:
The patent replaces the mechanical roughening process with a knitting mechanism that inherently creates loops through stitch formation. The knitting machine's needle and yarn interaction produces the required loop structure without requiring separate mechanical roughening equipment or processing steps
4Loss of substance
If the textile layer basis weight is reduced to save materials, then material usage and cost are improved, but adhesive penetration increases and loop functionality decreases
Solution Approach 1:
The patent changes multiple parameters simultaneously - reducing basis weight while compensating with increased loop density, optimized stitch patterns, and selected yarn characteristics - to maintain loop functionality despite lower material quantity
Solution Approach 2:
The patent makes the knit textile layer multi-functional by having it simultaneously serve as the structural base layer, the loop-forming surface, and the adhesive bonding substrate, eliminating the need for separate heavy reinforcement layers and achieving material savings while maintaining functionality
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 solution reduces raw material usage, simplifies production, and ensures reliable loop functionality with minimal material, facilitating easy attachment and detachment while maintaining effective adhesion or lamination, thus addressing the need for cost-effective and efficient grinding device design.
Implementation Method 1
textile layer (3) having on a first side (5) knitted, woven or knitted loops (4) for releasable attachment to a hook part (20) of a Velcro fastener of the hook-loop type
Implementation Method 2
applying a top layer (1) containing abrasives by gluing, lamination or welding to a second side (6) of the textile layer (3)
Data Source
Figure 1~2
AI summary
The invention relates to a grinding device for detachably fastening to a hook part of a touch fastener of the hook-and-loop type and to a corresponding production method. Typically, grinding machines or handles, for example, are equipped with corresponding hook parts, to which grinding devices according to the invention or previously known grinding devices, which are to be detachably fastened, can be fastened by means of corresponding loops. The problem addressed by the invention is that of further developing previously known grinding devices for detachably fastening to a hook part of a touch fastener of the hook-and-loop type or further developing a corresponding production method in such a way that raw materials can be saved and the production can be simplified. This problem is solved by means of a grinding means for detachably fastening to a hook part of a touch fastener of the hook-and-loop type, comprising a top layer (1, 2, 5) having grinding means (1) and a lower textile layer (3) connected in a planar manner to the top layer by means of adhesive bonding, lamination, or welding, which textile layer comprises, on the side of the textile layer facing away from the top layer, loops (4) for detachably fastening to a hook part of a touch fastener of the hook-and-loop type, said loops being formed by knitting or weaving, wherein the textile layer has a weight per unit area of 75 g/m2 or less.