Multi-Web Non-Woven Article Edge Density Joining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multi-web textile articles made from non-woven webs often have weak joints between sheets, leading to insufficient resistance and higher manufacturing costs due to the need for additional reinforcement measures.
Innovation Solution
The textile article is produced by joining non-woven sheets with greater material density at the edges compared to the center, and the joints between sheets are made along the edges with higher material density, creating an accordion-like configuration for enhanced resistance and tenacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-woven sheets are joined together to form multi-web articles, then productivity and coverage area are improved, but the joints become weak and liable to break under traction forces
Solution Approach 1:
The non-woven sheets are constructed with non-uniform density distribution, featuring higher material density at the edges compared to the center. This local quality enhancement at the edges provides reinforced zones specifically at the joining locations, improving joint strength without compromising the overall productivity and coverage area of the multi-web article.
2Strength
If reinforcement measures are applied to strengthen lateral edges, then joint resistance is improved, but manufacturing cost increases due to additional operations
Solution Approach 1:
The reinforcement of edge areas is performed during the initial sheet formation process rather than as a subsequent operation. By incorporating higher material density at the edges during the non-woven manufacturing stage, the sheets are pre-reinforced before joining, eliminating the need for additional reinforcement operations and reducing manufacturing costs while maintaining improved joint resistance.
Data Source
Figure 1~10b
Figure 3~5
Figure 6~9
AI summary
A multi-web type textile article (11 ), in particular for covering wide surface areas, made of a plurality of webs or sheets (12) of non-woven of a given material (M), for example polypropylene, joined together, wherein the various sheets (12) are produced, using a "spunbond" type process, so that they have a density (D) of material (M) per unit of surface area which is greater at the edges (12a) than in the centre (12b) of each sheet, and wherein furthermore the sheets (12) are joined together to form the multi-web article along the respective edges (12a) possessing this greater density of material, so that the article (11 ) is characterized by improved resistance and tenacity both in the area of the junctions (11a) between the various sheets (12) and along the respective external lateral edges (11 ') that are not joined.