Double-Layered Food Wrapping Sheet with Die-Cut Bands
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Solution Overview
Problem
Existing food wrapping solutions are expensive, complex to produce, and compromise hygiene due to the use of weak and easily electrified plastic film wings that require manual moistening for deployment, leading to contamination risks and product leakage.
Innovation Solution
A double-layered wrapping sheet with common paper as the lower layer and impermeable plastic film as the upper layer, featuring two longitudinal die cutting-folding lines that create three bands for easy handling and protection, preventing contact with external surfaces and machine residues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plastic film wings are used to form the double-layered sheet, then hygiene protection is improved, but the film is weak and easily electrified requiring manual moistening for deployment
Solution Approach 1:
A release film is introduced as an intermediary layer between the plastic film and the food product. This release film serves as a mediator that prevents direct contact between the operator's hands and the food product during deployment, eliminating the need for manual moistening while maintaining hygiene protection. The release film is peeled off to allow the plastic film to adhere to the food product.
Solution Approach 2:
The release film is a disposable component that is used once during deployment and then discarded. This allows the main plastic film to remain intact and hygienic throughout the process, as the release film absorbs the contamination from hand contact instead of the food-contact surface.
2Ease of operation
If the plastic film wings are laid down on the counter for deployment, then handling is simplified, but contamination from machine residues and other products occurs
Solution Approach 1:
The double-layered sheet is segmented into three distinct zones: a first lateral band, a central band for receiving the food product, and a second lateral band. This segmentation allows the lateral bands to be used for handling and folding while the central band remains protected for food contact, preventing contamination spread.
Solution Approach 2:
Different parts of the sheet have different functions and properties. The lateral bands are designed for handling and folding operations, while the central band is protected and designated for food contact. This local differentiation ensures that contaminated areas do not contact the food product.
3Ease of manufacture
If the plastic film is weak and easily electrified, then production cost is reduced, but the film requires manual moistening and folding to prevent product leakage
Solution Approach 1:
The lateral bands are pre-formed and positioned to automatically fold over the food product when the sheet is deployed. This preliminary configuration ensures that the weak plastic film is properly positioned to contain the product without requiring additional folding operations or manual intervention to prevent leakage.
Solution Approach 2:
The physical parameters of the plastic film are optimized to balance weakness (for cost) with sufficient containment capability. The film's elasticity and foldability are enhanced through parameter adjustments, allowing it to reliably contain products despite being weak and easily electrified.
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 provides a cost-effective, easy-to-handle wrapping sheet that maintains hygiene by preventing contamination and product leakage, with the elastic memory of the lateral bands keeping them raised and strong enough to retain the product without lateral folds.
Implementation Method 1
the elastic memory of the wrapper, so it does not penetrate underneath said machines and hence it cannot collect thereunder any debris and remains of the products served previously and/or of those that may have become unhealthy or otherwise hygienically imperfect
Data Source
Figure 1~5
AI summary
A double layered sheet, whereof the lower one (1) is made of common paper for food products, the upper layer (2) is made of plastic film for food products, with the two layers having nearly equal width, with two die cutting-folding, or simple folding, longitudinal lines (3) and (4), able to subdivide the sheet into three bands (5), (6) and (7) of such width as to enable the two lateral bands to be folded on the central one and to superpose each other at least for a strip towards the free edges.