Multi-layer J Seam Structure for Mesh Bags
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Solution Overview
Problem
Existing side-sealed mesh bags have seam strengths that are only approximately 50% or less of the original strength of the mesh fabric, requiring additional adhesive materials and increasing manufacturing costs.
Innovation Solution
A heat-sealed multi-layer 'J' seam structure that bonds open mesh fabric layers without the use of adhesive materials, utilizing a sacrificial seal to maintain structural integrity and provide volumetric flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive film strips are pre-applied to mesh fabric layers, then seam strength is improved, but manufacturing cost increases
Solution Approach 1:
The invention extracts and eliminates the adhesive film strip from the seam structure, achieving seam strength through the multi-layer fabric configuration and heat sealing alone. This removes the additional manufacturing cost associated with adhesive materials while maintaining structural integrity.
Solution Approach 2:
The mesh fabric layers themselves provide the bonding function through heat sealing, eliminating the need for separate adhesive materials. The fabric structure serves its own sealing and strengthening purpose through the multi-layer configuration and thermal bonding process.
2Strength
If adhesive film strips are used to bond mesh fabric layers, then seam strength is improved, but the seam strength remains only 50% or less of the original fabric strength
Solution Approach 1:
The invention creates a composite multi-layer fabric structure where multiple mesh fabric layers are heat sealed together to form a unified seam. This composite structure achieves seam strength comparable to the original fabric strength by distributing stress across multiple layers bonded through heat sealing.
Solution Approach 2:
The invention changes the bonding mechanism from adhesive-based to heat sealing-based, fundamentally altering how layers are joined. This parameter change enables the seam to achieve strength equivalent to the original fabric by creating a thermal bond that integrates the layers structurally rather than superficially.
3Ease of manufacture
If a multi-layer heat-sealed seam structure is implemented without adhesive materials, then manufacturing cost is reduced, but seam strength may be compromised
Solution Approach 1:
The invention changes the bonding method from adhesive-based to heat sealing-based, using thermal energy to fuse the mesh fabric layers directly. This parameter change eliminates adhesive material costs while achieving superior seam strength through direct thermal bonding of the fabric structure.
Solution Approach 2:
The mesh fabric layers bond to each other through heat sealing without requiring external adhesive materials. The fabric structure itself provides the bonding function through thermal fusion, eliminating additional manufacturing costs while maintaining structural integrity.
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
The solution achieves seam strengths comparable to the original mesh fabric strength, reducing manufacturing costs and enhancing the performance of side-sealed mesh bags while maintaining structural integrity and increasing volumetric capacity.
Implementation Method 1
a heat-sealed multi-layer 'J' seam structure that bonds open mesh fabric layers without the use of adhesive materials
Data Source
AI summary
The present invention is directed to a side-sealed open mesh fabric bag having one or more multi-layer seam structures. At least one side seam of the bag comprises a plurality of folded layers of the bag's fabric bonded together within a seam structure by a plurality of seal portions. At least one of those seal portions is a sacrificial seal configured to at least partially give from the seam structure, whilst one or more other seal portions of the seam structure remain intact. The sacrificial seal provides the bag with volumetric flexibility, whilst the remaining seam structure provides an improved seam strength.