Single-Layer Vacuum Cleaner Filter Bag With Calendered Weld Points
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Solution Overview
Problem
Existing vacuum cleaner filter bags require multiple layers and costly production methods to achieve sufficient filtration efficiency and mechanical strength, making them expensive to manufacture.
Innovation Solution
A single-layer vacuum cleaner filter bag with a meltblown nonwoven layer, which is thermally or ultrasonically calendered to create weld points for strength and stability, eliminating the need for multiple layers and diverse manufacturing methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple nonwoven layers are combined to achieve sufficient filtration efficiency and mechanical strength, then the filtration performance and durability are improved, but the production cost increases due to requiring diverse manufacturing methods and layer connection processes
Solution Approach 1:
The patent merges multiple nonwoven layers into a single integrated nonwoven layer that combines the functions of filtration, mechanical strength, and stability. This single layer is designed with optimized fiber composition, density, and structure to simultaneously achieve the filtration efficiency previously requiring multiple layers, thereby eliminating the need for separate layer production and connection processes
Solution Approach 2:
The single nonwoven layer is designed to perform multiple functions simultaneously: filtration of particles, provision of mechanical strength, and maintenance of structural stability. This multi-functional design replaces the need for specialized layers (filtration layer, reinforcement layer, protective layer) that would otherwise require different manufacturing methods and connection processes
2Strength
If multiple nonwoven layers are connected through gluing, welding, or needling to achieve structural stability, then the mechanical strength is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent combines the structural support function previously requiring separate reinforcement layers into the main filtration layer itself. The single nonwoven layer is engineered with optimized fiber arrangement, density gradients, and structural characteristics that inherently provide both filtration and mechanical strength, eliminating the need for additional reinforcement layers and their connection processes
Solution Approach 2:
The patent optimizes key parameters of the single nonwoven layer including fiber diameter distribution, fiber length, basis weight, porosity, and density to simultaneously achieve adequate filtration efficiency and mechanical strength. By adjusting these parameters within specific ranges, the single layer attains the structural stability previously requiring multiple connected layers, thereby simplifying the manufacturing process
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 single-layer design achieves sufficient filtration efficiency and mechanical strength at lower production costs, making it suitable for short-term applications without compromising on performance.
Implementation Method 1
thermally or ultrasonically calendered to create weld points for strength and stability
Implementation Method 2
thermally or ultrasonically calendered to create weld points for strength and stability
Implementation Method 3
A single-layer vacuum cleaner filter bag with a meltblown nonwoven layer, which is thermally or ultrasonically calendered to create weld points for strength and stability
Data Source
AI summary
The Invention relates to a vacuum cleaner filter bag comprising a bag wall, wherein the bag wall comprises precisely one nonwoven layer in the form of a melt-spur microfibrous nonwoven layer.