Biodegradable Paper Filter with Wrapper Channels
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Solution Overview
Problem
Conventional cigarette filters made from cellulose acetate are non-biodegradable, leading to environmental persistence and taste issues, while paper filters offer improved biodegradability but compromise on filtration efficiency and sensory experience.
Innovation Solution
A mouthpiece or filter element with a longitudinally extending core of biodegradable paper material, wrapped with multiple layers to create channels that enhance filtration and reduce phenol yield, providing a combination of improved biodegradability and sensory properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cellulose acetate is used for filter manufacturing, then the filter provides acceptable sensory properties and taste, but the filter is non-biodegradable and persists in the environment
Solution Approach 1:
The filter combines biodegradable materials (paper, plant fibers) with functional coatings or treatments to achieve both environmental degradability and acceptable sensory properties. This composite approach allows the filter to biodegrade while maintaining taste and sensory characteristics through surface treatments or layered structures.
2Object-affected harmful factors
If paper is used as filtering material, then the filter achieves enhanced biodegradability and higher filtration efficiency, but the filter has deleterious effect on taste and low retention of toxic phenolic compounds
Solution Approach 1:
The patent combines paper with other materials (such as cellulose acetate layers, plant fibers, or coated surfaces) to create a composite filter structure. This allows the paper component to provide biodegradability and filtration efficiency while the additional materials compensate for taste degradation and improve phenol retention through adsorption or barrier properties.
Solution Approach 2:
Different regions of the filter are assigned different materials or properties: the core may use paper for biodegradability and filtration, while surface layers or specific zones use materials optimized for taste maintenance and phenol retention. This local differentiation allows each region to excel at its specific function without compromising overall 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 solution achieves over 90% biodegradability within six months, reduces phenol yield by up to 12% compared to paper filters, and offers smoother smoke compared to conventional filters, while being environmentally friendly and compliant with EU regulations.
Implementation Method 1
The paper or other biodegradable (e.g., non-cellulose acetate containing) filtering material of the longitudinally extending core of the present invention is biodegradable and has an enhanced biodegradability compared to cellulose acetate
Implementation Method 2
reduces phenol yield by up to 12% compared to paper filters
Data Source
AI summary
A mouthpiece, filter or filter element comprising a longitudinally extending core of paper or other biodegradable (e.g., non-cellulose acetate containing) filtering material, a first wrapper engaged around the peripheral surface of the core, and a second wrapper engaged around the first wrapper, the first wrapper defining at least with the second wrapper a plurality of channels extending longitudinally from the upstream end of the mouthpiece, filter or filter element and/or a plurality of channels extending longitudinally from the downstream end of the mouthpiece, filter or filter element.