Modified Atmosphere Packaging Foil Lamination
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Solution Overview
Problem
Current methods for modified atmosphere packaging, such as using cardboard boxes with laminated layers, result in inefficiencies due to excessive cardboard consumption, waste, and difficulties in changing laminated layers to meet demand, while also compromising airtightness and environmental sustainability.
Innovation Solution
A method involving an unfolded sheet folded into a box with horizontal flange parts forming an endless circumferential flange, where a plastic foil is heated and laminated to the inner wall and flange parts, eliminating the need for overlapping parts and providing a stronger, airtight seal without the limitations of laminated cardboard layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cardboard boxes with laminated layers are used for modified atmosphere packaging, then the packaging can be made from environmentally friendly materials, but the amount of cardboard consumed increases and waste is generated
Solution Approach 1:
The packaging is divided into two functional parts: a cardboard box providing structural support and a separate plastic foil providing airtight sealing. The foil is applied only to the flange area rather than the entire box, reducing material consumption while maintaining environmental benefits of cardboard usage.
Solution Approach 2:
The invention combines the advantages of cardboard (environmental friendliness, structural strength) with plastic foil (airtight sealing, flexibility). The foil is laminated to the flange to create a composite structure that achieves both environmental sustainability and effective sealing with reduced waste.
2Reliability
If a laminated layer is applied to cardboard to enable sealing, then airtight sealing can be achieved, but the flexibility to respond to changing demands is reduced due to difficulty in changing laminated layers
Solution Approach 1:
The plastic foil is applied to the flange in a dynamic, flexible manner rather than being permanently laminated to the entire cardboard structure. This allows the foil to be easily removed, replaced, or adjusted to meet changing sealing requirements while maintaining reliable airtight sealing when in place.
Solution Approach 2:
The sealing function is separated from the structural cardboard box by using a distinct plastic foil layer applied only to the flange area. This segmentation allows independent replacement of the sealing layer without affecting the cardboard structure, enabling quick response to changing demands.
3Ease of manufacture
If overlapping parts are used to fold the cardboard sheet into a box, then the box can be constructed from a single sheet, but the overlapping parts create steps that compromise airtightness
Solution Approach 1:
The sealing function is extracted from the box body and applied only to the flange area with the plastic foil. This removes the airtightness requirement from the overlapping joints of the box walls, allowing simple single-sheet construction without compromising sealing reliability.
Solution Approach 2:
The packaging is segmented into the box body (which can use simple overlapping joints for easy manufacture) and the flange area (which receives the plastic foil for airtight sealing). This separation allows each part to be optimized independently for its specific function.
4Reliability
If the plastic foil is heated and laminated to the inner wall and flange parts, then a strong airtight seal is achieved, but the process requires additional heating and lamination steps
Solution Approach 1:
The plastic foil is applied only to the flange area where sealing is required, rather than the entire box surface. This localized application reduces the complexity and time of the heating and lamination process while maintaining reliable airtight sealing where it is most needed.
Solution Approach 2:
Instead of laminating the foil to the entire box surface, the process applies the foil only partially to the flange area. This partial action achieves the necessary airtight sealing function with reduced process complexity and shorter processing time.
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 approach reduces waste, enhances box strength, ensures airtight sealing, and allows for biodegradable materials, improving environmental sustainability and flexibility in responding to changing demands by using a single sheet for packaging.
Implementation Method 1
heating the plastic foil
Implementation Method 2
pressing the heated plastic foil against the inner wall of the box and covering the circumferential flange, such that the plastic foil is laminated to box
Data Source
AI summary
The invention relates to a method for providing a packaging for modified atmosphere packaging, which method comprises the steps of: providing an unfolded sheet for folding a box; folding the unfolded sheet to a box having at least an access opening and flange parts bordering the access opening, which flange parts compose an endless circumferential flange; providing a plastic foil; heating the plastic foil; pressing the heated plastic foil against the inner wall of the box and covering the circumferential flange, such that the plastic foil is laminated to box. The invention further relates to a packaging.