Porous Functional Packaging Material for Freshness
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Solution Overview
Problem
Current food packaging materials lack effective antimicrobial activity and antioxidant functions, leading to insufficient storage stability and freshness maintenance, particularly for perishable items like meat and fish, and often require high amounts of powdery particles that compromise material formability and transparency.
Innovation Solution
A synthetic resin-based food packaging material with three laminated films: a porous first film containing calcium carbonate powder coated with zinc oxide, boehmite powder coated with titanium dioxide, and hydroxyapatite powder coated with iron, a second film with natural mineral powders, and a third protective film, where functional particles are exposed through pores to minimize added amounts and enhance antimicrobial and antioxidant properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high amounts of powdery particles are added to enhance antimicrobial activity, then freshness maintenance improves, but material formability and transparency deteriorate
Solution Approach 1:
The patent utilizes porous powdery particles (charcoal and chitosan) that can absorb and release active substances. The porous structure allows functional particles to be exposed through pores in the packaging material, reducing the total amount of particles needed while maintaining effectiveness. This resolves the contradiction by improving freshness maintenance without compromising formability and transparency.
Solution Approach 2:
The packaging material combines multiple components including porous powdery particles, synthetic resin, and natural mineral materials to create a composite structure. This composite approach allows the material to achieve enhanced antimicrobial activity and freshness maintenance with reduced particle loading, thereby maintaining both formability and transparency.
2Reliability
If high amounts of powdery particles are added to enhance antimicrobial activity, then freshness maintenance improves, but transparency deteriorates
Solution Approach 1:
The porous structure of the powdery particles and the packaging material allows light to pass through while functional particles are exposed through pores. This reduces the total particle concentration needed, thereby maintaining transparency while achieving effective freshness maintenance.
Solution Approach 2:
The packaging material has different properties in different regions - the bulk material maintains transparency and formability, while localized pores expose functional particles for antimicrobial activity. This local differentiation allows transparency to be preserved while achieving effective freshness maintenance.
3Ease of manufacture
If conventional packaging materials are used, then manufacturing simplicity is maintained, but antimicrobial activity and antioxidant functions are insufficient
Solution Approach 1:
The packaging material incorporates powdery particles and natural mineral materials that actively perform antimicrobial and antioxidant functions. These materials work autonomously within the packaging structure, providing self-service functionality that enhances storage stability without complicating the manufacturing process.
Solution Approach 2:
The patent creates a composite packaging material that integrates functional particles (charcoal, chitosan, natural mineral materials) with synthetic resin. This composite structure maintains manufacturing simplicity while providing enhanced antimicrobial activity and antioxidant functions for improved storage stability.
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 packaging material effectively maintains food freshness by exposing functional particles through pores, reducing the need for separate deoxidizing agents, preventing oxidation, adsorbing ethylene gas, controlling humidity, and emitting far-infrared rays, thereby extending storage stability and freshness while maintaining transparency and formability.
Implementation Method 1
hydroxyapatite powder coated with iron... effectively maintains food freshness by exposing functional particles through pores, reducing the need for separate deoxidizing agents, preventing oxidation
Implementation Method 2
adsorbing ethylene gas... controlling the content of water that causes food deterioration
Implementation Method 3
emitting far-infrared rays, thereby extending storage stability and freshness
Implementation Method 4
calcium carbonate powder coated with zinc oxide, boehmite powder coated with titanium dioxide... has improved antimicrobial activity
Data Source
AI summary
A functional food packaging material and a method for making the same, where the food packaging material includes: a first film comprising synthetic resin, calcium carbonate powder coated with zinc oxide, boehmite powder coated with titanium dioxide, and hydroxyapatite powder coated with iron; a second film laminated on the first film and comprising powdery particles that contain synthetic resin, loess, elvan, kaolin, zeolite, feldspar, black mica, jade, selenium and charcoal; and a third film laminated on the second film and made of synthetic film. The first film has a higher porosity than that of the second film, and the second film has a higher porosity than that of the third film. The food packaging material has improved antimicrobial activity and maximizes food storage stability. The amount of functional powder added is minimized so that the formability of the packaging material is not adversely affected.