Bag-in-box packaging with concave base

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Solution Overview

Problem

Current bag-in-box packaging for powdered foods, such as milk powder, is inefficient for complete removal of contents and lacks sustainability due to non-recyclable materials and flat container bases.

Innovation Solution

A bag-in-box package design featuring a sealable container with a concave base and a tubular bag glued to the inside over a large area, using recyclable materials like cardboard and recyclable plastics for the closure cap.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the tubular bag is loosely placed in the container, then the packaging is easy to manufacture, but the contents cannot be removed completely

Engineering Contradiction:

Improveease of manufactureVSAvoidremoval completeness

Core Design Contradiction:

Ease of manufactureVSLoss of substance

Solution Approach 1:

The tubular bag is pre-connected flat to the inside of the container base before filling, creating a fixed configuration that enables complete emptying. This preliminary attachment action ensures the bag maintains proper positioning throughout use, allowing contents to be fully removed without residue.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The container base is designed with a concave curvature instead of a flat surface. This curved geometry works in conjunction with the connected bag to facilitate complete emptying of contents, as the concave shape directs remaining material toward the bag opening for full removal.

Inventive Principle:

Principle #14Spheroidality (Curvature)

2Reliability

If non-recyclable materials are used, then the packaging provides good barrier properties, but the sustainability is poor

Engineering Contradiction:

Improvebarrier propertiesVSAvoidsustainability

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The packaging is divided into separate functional components: the container base provides structural support and barrier properties, while the tubular bag provides the sealing and dispensing function. This segmentation allows each component to be optimized for its specific function while using recyclable materials, improving overall sustainability without compromising barrier properties.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The material composition parameters are changed from non-recyclable plastics to recyclable materials such as cardboard for the container and recyclable plastics for the bag. This parameter change maintains the necessary barrier properties through proper material selection and layering while enabling recycling and reducing environmental impact.

Inventive Principle:

Principle #35Parameter changes

3Stability of the object's composition

If the container base is flat, then the container is stable for storage, but the contents are difficult to empty

Engineering Contradiction:

Improvestorage stabilityVSAvoidemptying ease

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The container base is designed with a concave curvature instead of a flat surface. This curved geometry facilitates complete emptying by directing remaining contents toward the bag opening, while the overall container structure maintains stability for storage through its geometric design and connection to the tubular bag.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS20250026555A1Bag-in-box packaging

Publication Date: 2025.01.23 DMK DEUT MILCHKONTOR

AI summary

A bag-in-box packaging is proposed, preferably for the packaging of milk powders, comprising or consisting of: a closable container, a closure cap for the container and a fillable tubular bag, wherein the tubular bag is connected flat to the inside of the container and the bottom of the container is concave on the inside.