Sheet material for extraction, extraction filter, and extraction bag
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Solution Overview
Problem
Existing sheet materials for extraction, such as tea bags and coffee filters, face challenges in achieving high transparency and extraction efficiency while minimizing powder leakage and ensuring machine adaptability, as increased transparency and extraction rates often lead to powder leakage and reduced modulus, making them prone to deformation and defective products.
Innovation Solution
A sheet material comprising a spunbonded nonwoven fabric layer and a meltblown nonwoven fabric layer, with specific fiber diameters and basis weights, is used to create a filter or bag that balances transparency, extraction efficiency, and modulus, reducing powder leakage and enhancing machine adaptability by regulating the total fiber length and 3% modulus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If fiber spacing is widened by shortening fiber length or lowering basis weight to increase transparency and extraction properties, then transparency and extraction rate are improved, but powder leakage increases and modulus decreases causing deformation
Solution Approach 1:
The sheet material is divided into multiple layers with different functions: a first layer with longer fibers for structural support and high modulus to prevent deformation, and a second layer with shorter fibers for high transparency and extraction properties. This segmentation allows each layer to optimize for its specific function without compromising the other.
Solution Approach 2:
The invention uses a composite structure combining two types of nonwoven fabric layers with different fiber length characteristics. The composite material integrates the advantages of both long-fiber (high modulus) and short-fiber (high transparency) materials, achieving a balance between mechanical strength and extraction performance while preventing powder leakage.
2Productivity
If fiber spacing is widened to increase quantity of airflow and permeability to hot water, then extraction properties are enhanced, but powder leakage through fiber spacings increases
Solution Approach 1:
The sheet material is divided into multiple layers with different functions: a first layer with longer fibers for structural support and high modulus to prevent deformation, and a second layer with shorter fibers for high transparency and extraction properties. This segmentation allows each layer to optimize for its specific function without compromising the other.
Solution Approach 2:
The invention uses a composite structure combining two types of nonwoven fabric layers with different fiber length characteristics. The composite material integrates the advantages of both long-fiber (high modulus) and short-fiber (high transparency) materials, achieving a balance between mechanical strength and extraction performance while preventing powder leakage.
3Illumination intensity
If basis weight is lowered to enhance transparency and extraction properties, then transparency and extraction rate are improved, but modulus decreases causing deformation under tensile force
Solution Approach 1:
The sheet material is divided into multiple layers with different functions: a first layer with longer fibers for structural support and high modulus to prevent deformation, and a second layer with shorter fibers for high transparency and extraction properties. This segmentation allows each layer to optimize for its specific function without compromising the other.
Solution Approach 2:
The invention uses a composite structure combining two types of nonwoven fabric layers with different fiber length characteristics. The composite material integrates the advantages of both long-fiber (high modulus) and short-fiber (high transparency) materials, achieving a balance between mechanical strength and extraction performance while preventing powder leakage.
Data Source
AI summary
A sheet material for extraction with excellent transparency and extraction properties, is less likely to cause powder leakage, and has high modulus and excellent machine adaptability; an extraction filter; and an extraction bag. The sheet material having a first layer of a spunbonded nonwoven fabric formed from polyester-based fibers having an average diameter of 18 to 28 μm, the fabric having a basis weight of 8 to 19 g/m2; and a second layer of a meltblown nonwoven fabric formed from polyester-based fibers having an average diameter of 16 to 28 μm, the fabric having a basis weight of 2 to 8 g/m2, wherein the sum of the lengths of all fibers included in 1 cm2 of the sheet material for extraction is 3.3 to 4.8 m, and the 3% modulus is 5.5 N or higher; and an extraction filter and an extraction bag formed by this sheet material for extraction.