Fiber-Based Beverage Lid Vacuum Forming with Barrier Slurry
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Solution Overview
Problem
Current fiber-based packaging technologies are not well-suited for meat, poultry, prepared food, produce, microwavable food containers, and beverage lids due to limitations in moisture, vapor, and oil barriers, which hinder their adoption as alternatives to plastic containers.
Innovation Solution
The development of novel fiber-based slurry formulations and geometric features that incorporate moisture, vapor, and oil barriers, along with modified vacuum tooling for improved structural rigidity and vent hole size, enables the creation of biodegradable and compostable containers and lids that maintain performance and cost competitiveness with plastic alternatives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If fiber-based slurry is used to manufacture containers and lids, then biodegradability and sustainability are improved, but moisture barrier performance and structural rigidity deteriorate
Solution Approach 1:
The patent applies composite materials by combining fiber-based slurry with moisture barrier coatings and geometric structural features. The fiber slurry provides biodegradability while the composite structure with barrier coatings maintains moisture protection, resolving the contradiction between sustainability and moisture barrier performance.
Solution Approach 2:
The patent implements local quality by applying moisture barrier coatings specifically to critical surfaces where moisture protection is needed, while maintaining the overall biodegradable fiber-based structure. This localized approach allows different regions of the container to have optimized properties for both sustainability and moisture resistance.
2Object-affected harmful factors
If fiber-based slurry is used to manufacture containers and lids, then environmental sustainability is improved, but structural rigidity and dimensional stability deteriorate
Solution Approach 1:
The patent utilizes geometric features including curved surfaces and optimized wall thickness profiles to enhance structural rigidity. The curved geometry distributes stresses more effectively than flat surfaces, providing dimensional stability while maintaining the biodegradable fiber-based material composition.
Solution Approach 2:
The patent combines fiber-based slurry with structural reinforcement elements and geometric design features to achieve both sustainability and structural rigidity. The composite approach allows the material to maintain its biodegradable nature while the structural design provides the necessary strength and dimensional stability.
3Ease of manufacture
If conventional vacuum forming is used for fiber-based lids, then manufacturing simplicity is maintained, but ability to form complex geometries with negative draft deteriorates
Solution Approach 1:
The patent applies dynamics by using a movable piston mechanism in the vacuum forming tooling. The piston can move to apply pressure and release air, enabling the formation of complex geometries with negative draft angles that would otherwise be impossible with static vacuum forming equipment.
Solution Approach 2:
The patent introduces an intermediary piston mechanism between the vacuum forming tool and the fiber slurry. This intermediary device allows for controlled pressure application and air release, enabling the formation of complex geometries while maintaining the simplicity of the overall vacuum forming process.
4Ease of manufacture
If fiber-based lids are manufactured without improved barrier formulations, then manufacturing cost is reduced, but performance competitiveness with plastic deteriorates
Solution Approach 1:
The patent applies parameter changes by optimizing the chemical composition and formulation parameters of the fiber-based slurry. By adjusting parameters such as fiber type, binder concentration, and additive ratios, the patent achieves performance competitiveness with plastic while maintaining cost-effective manufacturing processes.
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 allows fiber-based products to replace plastic containers in various applications, including food and beverage packaging, by enhancing structural rigidity, moisture resistance, and vapor barrier performance, thus addressing the limitations of existing technologies and providing a sustainable alternative.
Implementation Method 1
a vacuum is applied to the generally convex backside. The vacuum pulls the slurry onto the mold to form the shape of the package
Data Source
AI summary
Methods and apparatus for vacuum forming a beverage lid using a fiber-based slurry. The slurry comprises a moisture barrier component in the range of 0.5%-10% by weight, a rigidity component in the range of 1%-4% by weight, and a polycationic component in the range of about 1%-4%.