Fresh-Keeping Can Structure for Airtight Recyclable Packaging

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Solution Overview

Problem

Existing biodegradable and recyclable containers face challenges in structural strength, recyclability, and the inability to maintain airtight and waterproof properties, limiting their use for carbonated drinks or pressurized beverages, and they are difficult to disassemble for complete recycling.

Innovation Solution

A fresh-keeping can composed of a spiral paper housing, an aluminum easy-open lid, a biodegradable inner container made of bio-based polyethylene furanoate, and a detachable biodegradable plastic bottom cover, with threaded connections for easy disassembly and reusability, ensuring a solid structure, airtightness, and waterproof properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If paper bottles are used to replace plastic bottles, then environmental degradation is reduced, but structural strength and compression strength are insufficient

Engineering Contradiction:

Improveenvironmental degradationVSAvoidstructural strength

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The patent employs composite materials by combining paper housing with aluminum lid and biodegradable plastic inner container. The paper housing provides eco-friendly material selection while the aluminum lid reinforces structural strength and provides sealing. This composite approach allows the container to maintain both environmental benefits and mechanical strength requirements for carbonated drinks.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The container is divided into separate components: paper housing, aluminum lid, and biodegradable plastic inner container. Each component can be manufactured independently using optimal materials and processes, then assembled together. This segmentation allows the paper housing to be optimized for eco-friendly properties while other components provide necessary structural strength.

Inventive Principle:

Principle #1Segmentation

2Reliability

If glass bottles are used for storage, then recyclability and reusability are improved, but they are easy to shatter and cannot isolate sunlight or UV light

Engineering Contradiction:

ImproverecyclabilityVSAvoidshatter resistance

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent uses composite materials combining paper housing with aluminum lid and biodegradable plastic inner container. This composite structure provides both recyclability and shatter resistance, overcoming the limitations of glass bottles while maintaining environmental benefits.

Inventive Principle:

Principle #40Composite materials

3Strength

If metal cans are used for storage, then structural strength is improved, but they are easily deformed or compressed due to external force

Engineering Contradiction:

Improvestructural strengthVSAvoiddeformation resistance

Core Design Contradiction:

StrengthVSStability of the object's composition

Solution Approach 1:

The patent employs composite materials with paper housing reinforced by aluminum lid and biodegradable plastic inner container. This composite structure provides sufficient structural strength while maintaining resistance to deformation and compression, solving the limitations of conventional metal cans.

Inventive Principle:

Principle #40Composite materials

4Object-affected harmful factors

If biodegradable containers are used, then environmental friendliness is improved, but components are difficult to break down or detach for sorting and recycling separately

Engineering Contradiction:

Improveenvironmental friendlinessVSAvoidrecyclability

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The container is segmented into separate components (paper housing, aluminum lid, biodegradable plastic inner container) that can be easily detached and recycled separately. This segmentation enables complete recycling of each component using appropriate recycling processes, overcoming the difficulty of separating biodegradable container components.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent design allows for discarding and recovering each component separately. The paper housing, aluminum lid, and biodegradable plastic inner container can be recovered through respective recycling processes, maximizing recycling efficiency and environmental friendliness.

Inventive Principle:

Principle #34Discarding and recovering

Data Source

PatentUS20260035126A1Environmentally friendly fresh-keeping can and method of manufacturing the same

Publication Date: 2026.02.05 HSU YU TING

AI summary

An environmentally friendly fresh-keeping can and a method of manufacturing the same are provided. The environmentally friendly fresh-keeping can includes a housing, an inner container, an easy-open lid, and a bottom cover. The housing, the inner container, the easy-open lid, and the bottom cover are respectively made of a spiral paper tube, bio-based polyethylene 2,5-furanoate (PEF), aluminum, and biodegradable plastic. The inner container is mounted into the housing through an inner opening on a top of the inner container. Then the easy-open lid and the bottom cover are respectively used to seal the inner opening of the inner container and a bottom opening of the housing. The respective components are made of biodegradable, recyclable and reusable materials and able to be disassembled for recycling and reuse. Thereby the can meets requirements for environmental protection and recycling.