Nano-lamination Fruit Bag with Electrospun Membrane
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Solution Overview
Problem
Conventional fruit bags face issues with air permeability, water resistance, and durability, leading to problems such as moisture absorption, pest control, and fruit damage, particularly during the rainy season, and they are not suitable for coloration or long-term fruit protection.
Innovation Solution
A fruit bag with a nano-lamination film that includes a nano-membrane produced by electrospinning and laminated non-woven fabric for strength reinforcement, providing controlled air permeability and water repellency, and allowing for easy printing and coloring, while preventing moisture and pest issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional paper bags are used for fruit cultivation, then they provide basic protection, but they have high moisture absorption rate and poor water resistance
Solution Approach 1:
The patent applies composite materials by combining multiple layers including a water-resistant outer layer, a functional middle layer with specific properties, and an inner layer in contact with the fruit. This multi-layer composite structure achieves both water resistance and controlled moisture management, resolving the contradiction between preventing external moisture ingress and managing internal humidity.
2Reliability
If air permeability is increased to prevent moisture buildup, then humidity control improves, but the bag becomes too soft and sticks to the fruit
Solution Approach 1:
The multi-layer composite structure combines materials with different properties: one layer provides air permeability for humidity control, while another layer provides structural strength and rigidity. This composite approach allows the bag to maintain both breathability and structural integrity, preventing it from becoming too soft and sticking to the fruit.
Solution Approach 2:
Different regions of the bag have different properties tailored to their functions. The outer layers may have different permeability and strength characteristics compared to the inner layers, allowing optimal performance in each zone - structural strength where needed and breathability where required for humidity control.
3Productivity
If mesh material is used to secure air permeability, then ventilation improves, but light-shielding property deteriorates
Solution Approach 1:
The patent combines mesh material for air permeability with additional layers that provide light-shielding properties. The composite structure allows the mesh to maintain ventilation while other layers block light, achieving both high air permeability and effective light-shielding that would be impossible with mesh material alone.
4Reliability
If GSM of paper is increased to reduce air permeability, then water resistance improves, but the weight of the fruit bag increases
Solution Approach 1:
Instead of increasing the GSM of a single paper layer, the patent uses a multi-layer composite structure where lighter materials are combined strategically. This achieves the required water resistance through the composite architecture and material selection rather than relying on the weight and thickness of a single heavy layer, thus reducing overall bag weight.
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 fruit bag effectively manages humidity and air exchange, preventing fruit damage and maintaining quality by ensuring air permeability without moisture ingress, thus enhancing fruit protection and appearance.
Implementation Method 1
a nano-lamination film which allows air molecules to permeate but prevents water molecules from permeating
Implementation Method 2
a nano-membrane produced by electrospinning a polymer solution as a raw material for nano-fibers
Data Source
AI summary
Provided are a fruit bag and a manufacturing method thereof, for example, a fruit bag for a fruit of a fruit tree may include: an inner surface configured to surround the fruit; an outer surface configured to exposed to an outside; an opening formed in a predetermined size at the same position of the inner surface and the outer surface; a nano membrane generated by an electrospinning of a polymer solution as a raw material for nano-fibers; a non-woven fabric for strength reinforcement laminated on one or both sides of the nano membrane and a nano-lamination film covering the entire surface of the opening thereby while maintaining excellent air permeability, it is possible to properly maintain the humidity and against various external environmental effects.