Multilayer Food Support Segmented Weakened Line
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Solution Overview
Problem
Existing multilayer supports for food products face challenges such as complex manual alignment of pre-cut lines, adhesion issues, deformation during peeling, and warping due to the pre-cut line entering from both sides, leading to incomplete separation and recyclability issues.
Innovation Solution
A multilayer support with a cardboard blank coated on one face by a peelable film featuring a weakened line formed by perforation or scoring from one face to the other, allowing for discrete through portions that intersect the edges, facilitating complete separation without residues and maintaining rigidity through relief ribs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pre-cut line enters the cardboard sheet from both faces to facilitate film removal, then the film can be separated from the support, but the mutual alignment of the two incisions cannot be guaranteed and adhesion issues occur
Solution Approach 1:
The pre-cut line is segmented into two distinct parts: a first incision from the first face and a second incision from the second face. These incisions meet at a discontinuity within the cardboard thickness, creating separated cutting zones that eliminate alignment issues while enabling complete film removal.
Solution Approach 2:
The solution moves from a 2D alignment problem (matching incisions from both faces) to a 3D solution by creating a discontinuity in the thickness direction. The incisions operate in separate spatial zones along the thickness axis, eliminating the need for precise face-to-face alignment.
2Ease of operation
If the pre-cut line enters from both faces, then film separation is enabled, but paper material adheres to the adhesive part of the peelable film during removal
Solution Approach 1:
The cutting path is segmented into two separate incisions that do not connect through the entire thickness. This segmentation creates a discontinuity that prevents paper fibers from bridging across the full thickness, thereby preventing adhesion to the adhesive layer during film removal.
Solution Approach 2:
The harmful adhesion effect is eliminated by extracting the continuous paper path that causes contamination. The discontinuity in the pre-cut line removes the bridging paper material that would otherwise adhere to the adhesive, leaving the film surface clean for recycling.
3Ease of operation
If the support is peeled off, then film removal is achieved, but the cardboard sheet bends or deforms making removal difficult
Solution Approach 1:
The pre-cut line is divided into two separate incisions from opposite faces that meet at a discontinuity. This segmentation allows the cardboard to maintain structural integrity in each region while enabling controlled separation, preventing bending and deformation during the peeling process.
4Ease of operation
If the second film is fixed on the support, then food retention is achieved, but the support warps due to fixing and low-temperature environment
Solution Approach 1:
The support structure is divided by the segmented pre-cut line into distinct regions with improved stress distribution. The discontinuity in the incision pattern creates flexibility that accommodates thermal contraction in refrigerated environments, reducing warping while maintaining food retention capability.
Data Source
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AI summary
A multilayer support (1), particularly for food products, comprising a blank (2) made of cardboard or card which is coated on a first face (21) by a peelable film (3) made of plastic material, the first face (21) comprising a weakened line (4) that is covered by the peelable film (3) and is adapted to form on the blank (2) a closed area (11) that is delimited by at least one edge (13) of the blank (2) and by the weakened line (4), so that the closed area (11) can consequently be torn away from the rest of the blank (12) together with the peelable film (3), the weakened line (4) being obtained by perforation or scoring performed starting from the first face (21) toward the opposite face (22) of the blank (2), characterized in that the weakened line (4) is formed by a continuous incision (40) which passes through to the second face (22) only at discrete through portions (41), at least one (41a, 41b) of the discrete through portions (41) intersecting the at least one edge (13) of the blank (2).