Recycled Nonwoven Vacuum Filter Bag for Dust Capacity and Strength
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Solution Overview
Problem
Vacuum cleaner filter bags made of nonwoven fabrics face challenges in ecological and economic sustainability due to high costs and non-biodegradability, despite advancements in separation efficiency and mechanical strength, as they primarily consist of virgin plastics and non-biodegradable materials.
Innovation Solution
Development of vacuum cleaner filter bags utilizing a nonwoven fabric layer composed of powdery and/or fibrous recycled materials from textile manufacturing, such as cotton textiles and wool shearing, with a density of 0.005 g/cm3 to 0.03 g/cm3, bonded with thermally activated bicomponent fibers, achieving high dust storage capacity and mechanical strength while incorporating a significant percentage of recycled materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nonwoven fabrics made of virgin plastics are used for filter bags, then separation efficiency and mechanical strength are improved, but ecological sustainability and cost are worsened
Solution Approach 1:
The patent changes the material composition parameter by using recycled textile fibers (cotton, wool, synthetic fibers) instead of virgin plastics, while adjusting the nonwoven fabric structure to maintain filtration performance. The recycled fibers are processed into a nonwoven structure with controlled porosity and surface area to preserve dust separation efficiency despite the material change.
Solution Approach 2:
The patent creates a composite nonwoven fabric structure combining different types of recycled fibers (natural and synthetic) to achieve both mechanical strength and filtration efficiency. The composite structure leverages the complementary properties of different fiber types to compensate for the inherent limitations of recycled materials.
2Strength
If nonwoven fabrics made of virgin plastics are used for filter bags, then mechanical strength is improved, but ecological sustainability and cost are worsened
Solution Approach 1:
The patent modifies the mechanical properties parameter by optimizing the nonwoven fabric structure (fiber arrangement, bonding method, porosity) to achieve adequate tensile strength and durability using recycled fibers, eliminating the need for virgin plastics while maintaining functional performance.
Solution Approach 2:
The patent embraces the disposable nature of vacuum cleaner filter bags by using inexpensive recycled textile fibers that can be processed into functional filter material without requiring long service life, aligning with the typical replacement cycle of vacuum cleaner accessories.
3Reliability
If high-quality nonwoven fabrics are used for disposable filter bags, then performance characteristics are improved, but ecological sustainability is worsened
Solution Approach 1:
The patent adjusts the performance parameter requirements to match the actual needs of vacuum cleaner filtration, using recycled fibers processed into nonwoven fabrics with appropriate porosity, surface area, and structural properties to achieve sufficient dust separation without requiring high-quality virgin materials.
Solution Approach 2:
The patent recovers and reuses textile fibers from waste materials (recycled textiles, production waste) to create filter bag material, transforming waste into a functional product and reducing the need for virgin plastic production, thereby improving ecological sustainability while maintaining adequate performance.
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 use of recycled materials enhances the ecological and economic advantages of vacuum cleaner filter bags by maintaining excellent performance characteristics, including dust separation efficiency and service life, while reducing raw material usage and environmental impact.
Implementation Method 1
bonded with thermally activated bicomponent fibers
Data Source
AI summary
The invention provides a vacuum cleaner filter bag comprising a wall of an air-permeable material enclosing an interior and an inlet opening introduced into the wall, wherein the air-permeable material comprises at least one layer of a nonwoven fabric, which comprises powdery and/or fibrous recycled material from the production of textiles, in particular cotton textiles, wherein the at least one layer of the nonwoven fabric comprises powdery and/or fibrous recycled material having a density of 0.005 g/cm3 to 0.03 g/cm3, in particular of 0.007 g/cm3 to 0.02 g/cm3.