Split Multicomponent Nonwoven Food Bag for Vegetable Storage
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Solution Overview
Problem
Existing packaging materials for vegetables are inadequate in maintaining freshness and preventing spoilage, especially for consumers and professionals with limited storage facilities and access to fresh vegetables.
Innovation Solution
A food bag with walls made of a nonwoven material composed of split multicomponent filaments, which are partially perforated, allowing for controlled humidity and gas exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If standard packaging materials (plastic foil or paper bags) are used to store vegetables, then moisture loss is reduced and drying is prevented, but gas permeability is limited which leads to condensed water accumulation, vegetable softening, molding, and anaerobic reactions
Solution Approach 1:
The patent employs a nonwoven fabric with controlled porosity that allows selective permeability. The porous structure enables moisture vapor to escape while maintaining liquid moisture retention, and permits balanced gas exchange (oxygen and carbon dioxide) to prevent anaerobic conditions and condensation accumulation, thus resolving the contradiction between moisture protection and gas permeability
Solution Approach 2:
The invention uses a composite packaging system combining nonwoven fabric with specific fiber compositions and structural characteristics. This composite material integrates the benefits of moisture retention with enhanced gas exchange capabilities, overcoming the limitations of single-material packaging solutions like plastic foil or paper bags
2Loss of substance
If plastic foil or paper bags are used for vegetable storage, then vegetables are protected from drying, but these packagings cannot be reused and become waste leading to environmental problems and economic burden
Solution Approach 1:
The patent promotes packaging recovery and reuse by designing a durable nonwoven fabric bag that can be washed and reused multiple times. The material's resistance to degradation and ease of cleaning enable it to be recovered and reused, eliminating the single-use waste problem associated with plastic foil and paper bags while maintaining protective functionality
Solution Approach 2:
The invention replaces expensive, single-use packaging materials with a cost-effective, reusable alternative. The nonwoven fabric bag provides durable, economical packaging that eliminates the need for continuous disposal and replacement, reducing both environmental impact and long-term costs
3Ease of operation
If vegetables are stored at room temperature or in limited storage facilities, then accessibility and convenience are maintained, but vegetables spoil quickly through wilting, molding, shrinking, and consistency changes
Solution Approach 1:
The patent modifies the microenvironment parameters within the packaging by using nonwoven fabric that regulates humidity and gas composition. This creates optimal local conditions (controlled humidity levels, balanced oxygen-carbon dioxide ratio) that slow down biochemical degradation processes, extending vegetable freshness without requiring specialized storage facilities or temperature control
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 food bag significantly extends the storage time of vegetables by maintaining their freshness and edibility, reducing waste, and allowing for repeated use and washing.
Implementation Method 1
the nonwoven materials are also breathable and allow exchange of gas or steam
Implementation Method 2
the nonwoven materials are also breathable and allow exchange of gas or steam
Data Source
AI summary
Subject of the invention is a food bag for storing vegetables, wherein the walls of the food bag comprise a nonwoven which consists of multicomponent filaments, which are split at least partially into elementary filaments. The invention also relates to uses of the food bag and methods for storing food.