Moisture-Resistant Fiber Packaging with Multi-Layer Web
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fiber-based trays used for food packaging are susceptible to moisture damage, leading to softening, tears, leaks, and loss of package integrity, which complicates long-term food storage and shelf life maintenance.
Innovation Solution
A thermoformed food packaging article is created using a multi-layer web comprising an upper multi-layer film, a lower film, and a compressed fiber core between the film portions, with a total film content of less than 15 wt% of the packaging article's total weight, providing moisture resistance and rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If fiber-based trays are used for food packaging, then sustainability and recyclability are improved, but moisture resistance and structural integrity deteriorate
Solution Approach 1:
The patent applies composite materials by combining fiber-based material with thermoplastic binder to create a multi-layer web structure. The fiber layer provides sustainability and absorbency, while the thermoplastic binder provides moisture resistance and structural integrity. This composite approach resolves the contradiction by integrating materials with complementary properties.
Solution Approach 2:
The patent changes the physical and chemical parameters of the fiber material through compression and bonding processes. The fiber web is compressed to increase density and then bonded with thermoplastic material to alter its moisture absorption characteristics, transforming it from a moisture-sensitive material to a moisture-resistant packaging structure.
2Quantity of substance
If absorbent fiber materials are used, then moisture absorption is improved, but package integrity and rigidity deteriorate
Solution Approach 1:
The thermoplastic binder acts as an intermediary between the fiber layers, providing structural support while allowing the fiber material to maintain its moisture absorption capability. The binder creates a matrix that holds the fibers together, preventing the package from becoming soft and losing integrity when exposed to moisture.
Solution Approach 2:
The patent applies different properties to different parts of the packaging structure. The fiber layers maintain high moisture absorption capacity, while the thermoplastic binder layers provide rigidity and structural strength. This local differentiation of material properties allows the package to simultaneously absorb moisture and maintain integrity.
3Object-generated harmful factors
If fiber-based trays are used without sufficient film content, then sustainability is improved, but moisture barrier performance deteriorates
Solution Approach 1:
The patent changes the composition parameters of the packaging material by using a fiber-based web with thermoplastic binder in specific proportions. This composition provides adequate moisture barrier performance while maintaining high fiber content for sustainability, avoiding the need for excessive plastic film.
Solution Approach 2:
The composite structure of fiber web with thermoplastic binder creates a material that combines the sustainability of fiber with the moisture barrier properties of thermoplastic, achieving both goals simultaneously without relying on traditional high-film-content structures.
4Duration of action of stationary object
If fiber-based trays are used for long-term storage, then shelf life extension is improved, but structural stability under moisture exposure deteriorates
Solution Approach 1:
The thermoplastic binder provides continuous structural support throughout the shelf life of the product. As the fiber material naturally absorbs moisture over time, the binder continuously maintains structural integrity, preventing the package from degrading and ensuring long-term stability.
Solution Approach 2:
The thermoplastic binder is incorporated into the structure beforehand to preemptively counteract the softening effect of moisture. This prior reinforcement ensures that even after prolonged moisture exposure during storage, the package maintains its structural 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 solution effectively maintains the integrity and shape of the packaging throughout the shelf life of the food product, even with moisture-containing foods, while being sustainable and suitable for recycling.
Implementation Method 1
A fiber based moisture resistant packaging article and method of manufacture. The packaging article being thermoformed from a multi-layer web.
Data Source
AI summary
A fiber-based moisture resistant packaging article and a method of manufacturing a packaging article. The packaging article being thermoformed from a multi-layer web. The multi-layer web having an upper film portion that is a multi-layer film; a lower film portion; and a compressed fiber core disposed between the upper film portion and the lower film portion. The total film content of the thermoformed food packaging article being less than 15 wt % as compared to the total weight of thermoformed food packaging article.