Biodegradable Beverage Lid Structure With Composite Impact Strength
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Solution Overview
Problem
Conventional beverage container lids are not biodegradable and lack sufficient impact strength when made from lactic acid-based polymers using conventional molding methods, leading to environmental issues and practical usability limitations.
Innovation Solution
A biodegradable beverage container lid design featuring an interior and exterior cover connected by a hinge, with a spout, straw perforations, an elevated portion, and retaining walls, made from a thermoplastic polymer composition like polyhydroxybutyrate or polylactic acid, allowing for use with hot, cold, or foamy beverages and providing spill-proof and burn-free functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional molding methods (compression molding or injection molding) are used to process lactic acid-based polymers, then the manufacturing process is simple and cost-effective, but the resulting beverage container lids lack sufficient impact strength for practical use
Solution Approach 1:
The patent employs a two-layer composite structure where an inner lid made of lactic acid-based polymer is combined with an outer lid made of a different material (such as polypropylene or polystyrene). The outer lid provides the necessary impact strength and structural integrity, while the inner lid maintains the biodegradable properties. This composite approach allows the product to achieve sufficient strength for practical use while preserving the environmental benefits of lactic acid-based materials.
2Strength
If conventional plastic materials (polyethylene, polyvinyl chloride, polypropylene, polystyrene) are used for beverage container lids, then the lids have excellent transparency and structural integrity, but they have very low degradation rates and cause environmental pollution
Solution Approach 1:
The beverage container lid is divided into two functional segments: an inner lid made of biodegradable lactic acid-based polymer that contacts the beverage, and an outer lid made of conventional plastic material that provides structural protection and stacking stability. This segmentation allows each component to fulfill its specific function optimally - the inner lid degrades environmentally friendly while the outer lid provides durable protection during transport and storage.
Solution Approach 2:
The design enables selective disposal where the inner biodegradable lid can be composted or degraded after use, while the outer lid can be reused or recycled. The hinge connection allows easy separation of the two lids, facilitating different disposal pathways for each component based on their material properties and environmental impact.
3Object-generated harmful factors
If a biodegradable material is used for the beverage container lid, then environmental friendliness is improved, but the lid lacks sufficient impact strength for practical use
Solution Approach 1:
The patent creates a composite structure combining biodegradable lactic acid-based polymer for the inner lid with conventional high-strength plastic materials for the outer lid. This composite design allows the biodegradable material to maintain environmental friendliness while the conventional material provides the necessary impact strength and structural integrity for practical handling, transport, and stacking.
Data Source
AI summary
A beverage container lid includes an interior cover, an exterior cover, and a hinge connecting the interior cover to the exterior cover. The beverage container is versatile in that it may be adapted for use with a beverage container containing a cold beverage, a hot beverage, or a foamy or creamy beverage. The beverage container lid preferably includes a spout, straw perforations, an elevated portion, a reservoir bottom, a well portion, and a pair of retaining walls preventing direct flow of beverage from a pair of openings in the interior cover to the spout. Methods of use and methods of making a beverage container lid are also described.