Textured Warp-Knitted Loop Fabric for Hook-and-Loop Fasteners
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Solution Overview
Problem
Existing warp-knitted textile fabrics for hook-and-loop fasteners face challenges in achieving a low basis weight with high stability and a dense base, which is difficult to achieve using textured yarns.
Innovation Solution
The use of a textured multifilament yarn as the base yarn with an open lacing pattern, combined with smooth or textured yarns for wales, allows for a low basis weight while maintaining stability by avoiding unnecessary stitch formations and ensuring consistent spacing between wales, resulting in a dense fabric suitable for hook-and-loop fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If textured yarn is used in the loops to improve adhesive effect, then the adhesive effect is improved, but the basis weight increases and the fabric becomes less stable
Solution Approach 1:
The patent applies different yarn types in different locations: textured yarn is used specifically in the base layer where adhesive contact is needed, while smooth yarn is used in the loops where low weight and stability are priorities. This local differentiation resolves the contradiction by concentrating the adhesive enhancement only where it is functionally necessary.
Solution Approach 2:
The patent uses a composite structure with two different yarn types (textured and smooth) within the same fabric. The textured yarn provides adhesive properties in the base, while the smooth yarn maintains loop integrity and minimizes weight, creating a composite material system that balances adhesive effect with weight reduction.
2Reliability
If textured yarn is used to increase adhesive effect, then the adhesive effect is improved, but the fabric stability decreases
Solution Approach 1:
The textured yarn is localized to the base layer where it provides adhesive effect, while the smooth yarn is used in the loops to maintain fabric stability. This spatial separation allows each yarn type to optimize its function without compromising the other property.
Solution Approach 2:
The combination of textured and smooth yarns in a composite structure allows the fabric to simultaneously achieve adhesive effect (from textured base) and stability (from smooth loops), resolving the contradiction between these two properties.
3Ease of manufacture
If conventional knitting methods are used, then production is straightforward, but achieving low basis weight with high stability and dense base is difficult
Solution Approach 1:
The patent changes the fundamental parameter of yarn texture selection based on location: textured yarn for the base to achieve density and adhesive effect, smooth yarn for loops to minimize weight. This parameter change allows conventional knitting methods to produce a fabric with optimized low basis weight and high stability.
Data Source
Figure 1
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Figure 2e~2h
AI summary
The present invention relates to a textile fabric in the form of a warp-knitted material comprising loops, which is suitable for use as a component of a hook-and-loop fastener. The object of the present invention is to provide a textile fabric in the form of a knitted fabric for use as a loop component in a hook-and-loop fastener, which has a low basis weight combined with high stability and a dense backing.The problem is solved by forming the textile fabric from at least two yarns forming a base and at least one yarn forming loops and interlaced with the base, the loops of the loop yarn and the loops of the loop yarn being formed as a unit such that in the transverse and/or longitudinal direction at least one loop is present on every and/or every second continuous stitch of the textile fabric, and at least one first of the at least two yarns forming the base runs in partial weft and is bound off by at least one second yarn forming loops of the at least two yarns forming the base, wherein at least one of the yarns forming the base is a textured multifilament yarn and the stitch bars of the textile fabric have a distance and/or offset of one millimeter.