Replaceable Liner for Recyclable Beverage Cups

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Solution Overview

Problem

Current paper cups with plastic liners are difficult to recycle and biodegrade due to the integrated plastic coating, leading to environmental concerns and resource inefficiencies, and there is a need for a solution that allows for easy replacement and recycling of liners to facilitate the reuse and biodegradation of cups.

Innovation Solution

A system for a recyclable food container with a replaceable liner that can be inserted and secured within the cup using a device, allowing for easy separation and recycling, featuring a close-fitting cuff that can be either shrunk or stretched to fit snugly on the cup, enabling the cup to be reused and biodegraded.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If paper cups are coated with plastic (PE) to make them waterproof and reusable, then the liquid impervious property is improved, but the recyclability and biodegradability deteriorate

Engineering Contradiction:

Improveliquid impervious propertyVSAvoidrecyclability

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The cup system is divided into two separate components: a paper cup body and a removable plastic liner. The liner can be detached and separated from the cup, allowing the paper cup to be recycled independently while the liner is disposed of or recycled separately. This segmentation resolves the contradiction by maintaining the liquid impervious property through the liner while enabling recyclability of the cup.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The plastic liner is extracted as a separate, removable component from the paper cup structure. Instead of being integrated into the cup walls, the liner is inserted and can be taken out for separate disposal or recycling. This extraction allows the cup to maintain waterproofing during use while facilitating recycling processes.

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of operation

If paper cups are made with integrated plastic liners for single-use convenience, then the ease of operation is improved, but the environmental impact worsens due to difficulty in recycling and biodegradation

Engineering Contradiction:

Improvesingle-use convenienceVSAvoidenvironmental impact

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

By segmenting the cup into a reusable paper cup and a disposable liner, the system maintains the convenience of single-use operation while reducing environmental impact. The paper cup can be washed and reused multiple times, and the liner can be easily removed and disposed of in appropriate waste streams.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The liner is designed to be discarded after single use while the cup is recovered and reused. This partial application of the discard-and-recover principle allows the permanent cup to be reused while the liner is disposed of, balancing convenience with environmental considerations.

Inventive Principle:

Principle #34Discarding and recovering

3Productivity

If paper cups are designed as disposable with integrated liners, then the productivity is improved through single-use disposal, but the loss of substance increases due to material waste

Engineering Contradiction:

Improvesingle-use efficiencyVSAvoidmaterial waste

Core Design Contradiction:

ProductivityVSLoss of substance

Solution Approach 1:

The segmentation of cup and liner allows the durable cup component to be reused multiple times, reducing the frequency of replacement. Only the liner is disposed of after single use, significantly reducing overall material waste compared to disposing of the entire cup.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The liner is designed as a cheap, disposable component that is replaced frequently, while the cup is a more durable, reusable component. This differentiation allows the system to maintain high productivity through easy replacement of the liner while minimizing waste of the more valuable cup material.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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

This solution eliminates the need for washing cups, allows for multiple reuse, facilitates recycling, promotes biodegradability, ensures hygiene, and enables the use of 100% post-consumer waste, while preventing leakage and maintaining beverage temperature.

Implementation Method 1

Methodology Applied

Scientific EffectThermal contraction: Thermal Contraction

Data Source

PatentUS9539783B2Replaceable container liner, systems and methods

Publication Date: 2017.01.10 WISCHUSEN III HENRY

AI summary

A removable conformal liner for a beverage container is described. When the liner is inserted into an internal cavity of a beverage container, the body of the liner substantially conforms to the interior cavity. The container liner is adapted to provide snug cuffing over the lip portion of the beverage container. In one embodiment a container liner is configured for heat shrink cuffing. In another embodiment a container liner is configured for stretch cuffing. A system for manual, mechanized and a combination of mechanized and manual installation of the removable conformal liner is disclosed.