Recyclable Fiber Package With Removable Inner Lining
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Solution Overview
Problem
Conventional foodstuff packages made from plastic or board with edge flanges for lid fastening are inefficient in terms of space, material usage, and sealing reliability, leading to environmental issues and increased costs due to the need for additional plastic wrapping.
Innovation Solution
A product package made from recyclable fiber material with a recess lined by a removable inner lining, where the top edges of the frame serve as a fastening surface for the inner lining, eliminating the need for an edge flange and ensuring reliable leak-tight sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an edge flange is added to the package for lid fastening, then the sealing capability is improved, but the outer dimensions and space requirement increase by up to 20 percent
Solution Approach 1:
The invention extracts and eliminates the edge flange structure from the package design. Instead of adding a separate flange component, the package uses its existing top edge structure combined with a sealing film to achieve reliable sealing without the additional horizontal extension that would increase space requirements.
Solution Approach 2:
The invention transitions from a horizontal sealing approach (edge flange extending sideways) to a vertical sealing approach (sealing film extending down the side walls). This dimensional change allows sealing to occur along the vertical edges rather than requiring horizontal flange extensions, thereby maintaining compact package dimensions.
2Reliability
If an edge flange is added to the package for lid fastening, then the sealing capability is improved, but the material consumption increases
Solution Approach 1:
The invention removes the edge flange structure entirely, eliminating the additional material that would be required to manufacture it. The sealing function is achieved using the existing package structure combined with a sealing film, reducing overall material consumption.
Solution Approach 2:
The top edge of the package frame serves multiple functions simultaneously: it provides structural support for the package and acts as the fastening surface for the sealing film. This multi-functionality eliminates the need for a separate edge flange component, thereby reducing material requirements.
3Reliability
If an edge flange is added to the package for lid fastening, then the sealing surface is provided, but the manufacturing complexity increases
Solution Approach 1:
The invention extracts and eliminates the edge flange structure from the manufacturing process. By using the existing top edge of the package frame as the fastening surface, the manufacturing process is simplified and does not require the additional steps of forming and attaching a separate flange component.
4Reliability
If a thick edge flange is used for lid fastening, then the fastening surface is provided, but the pressing distribution during heat sealing becomes uneven affecting sealing quality
Solution Approach 1:
The invention uses a flexible sealing film instead of a thick rigid edge flange. The sealing film can conform to the heating element surface during heat sealing, ensuring uniform pressing distribution and consistent sealing quality across the entire sealing surface.
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
The solution reduces environmental impact, saves space and material, simplifies manufacturing, and ensures reliable sealing without additional wrapping, achieving up to 20% space savings and cost-effectiveness.
Implementation Method 1
the top edges of the side walls and end walls of the frame part and also the top edges of the corner parts form the top edge of the recess, which top edge is arranged to function as a fastening surface for the inner lining
Implementation Method 2
the package is closed in a leak-tight manner by heat sealing when the package has been filled and, if necessary, the food in it cooked
Data Source
AI summary
The object of the invention is a product package and a method for producing the product package. The product package comprises a recess (1a) for the product to be packed, the recess being provided with a base and with walls in connection with the base, in which case the frame part (2) of the recess (1a) has been formed by means of folds from recyclable fiber material and the aforementioned recess (1a) is lined on the inside with a separate inner lining (3), which is removable from the aforementioned frame part. The top edges of the side walls and end walls of the frame part and also the top edges of the corner parts (10) form the top edge of the recess, which top edge is arranged to function as a fastening surface for the inner lining (3), which inner lining (3) is adapted to comprise an edge section (4) extending over the top edge (5a) of the recess (1a).