Thermally Bonded Multi-Layer Identification Panel for Food Processing
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Solution Overview
Problem
Conventional identification boards for machines in the food processing industry are not compatible with food contact materials, fail to withstand aggressive cleaning agents and mechanical stress, and require frequent replacement due to damage, posing hygiene and safety concerns.
Innovation Solution
A multi-layered identification plate with directly adjacent and thermally bonded plastic layers of different colors, where indentations in the upper layer extend through to the lower layer for displaying symbols, ensuring chemical resistance and mechanical durability without the use of adhesion-promoting layers, and using food-grade plastics like polyethylene for the layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional marking plates (stickers, painted metal, formica) are used on food processing machines, then initial identification function is achieved, but they fail to withstand aggressive cleaning agents and mechanical stress, requiring frequent replacement
Solution Approach 1:
The patent uses a composite structure consisting of a food-contact-safe plastic carrier layer and a plastic marking layer. Both layers are made from food-grade plastics that resist chemical cleaning agents and mechanical stress. The thermally bonded multi-layer construction ensures the marking plate withstands aggressive cleaning conditions without deteriorating, eliminating the need for frequent replacements while maintaining food safety compliance.
Solution Approach 2:
The patent changes the material parameters by selecting specific food-grade plastics with appropriate chemical resistance and mechanical properties. The materials are chosen to withstand the chemical composition and temperature of cleaning agents used in food processing, transforming the marking plate from a conventional non-resistant material to one that maintains its integrity under harsh cleaning conditions.
2Strength
If adhesion-promoting intermediate layers are used to bond marking layers, then bonding strength is improved, but penetration by aggressive media and cleaning agent jets increases, impairing the bond
Solution Approach 1:
The patent removes the adhesion-promoting intermediate layer from the multi-layer structure. Instead of using a separate adhesive layer, the marking layer and carrier layer are directly thermally bonded. This extraction eliminates the vulnerability point where cleaning agents could penetrate and compromise the bond, while the direct thermal bonding maintains sufficient bonding strength for the application.
Solution Approach 2:
The patent creates a composite structure where the marking layer and carrier layer are directly bonded through thermal processing. This direct bonding approach eliminates the need for intermediate adhesive layers that would be susceptible to chemical penetration, resulting in a more chemically resistant composite material system.
3Reliability
If food-contact-safe materials are used for identification plates, then hygiene compliance is achieved, but resistance to aggressive cleaning agents and mechanical stress is reduced
Solution Approach 1:
The patent constructs a composite material system where both the carrier layer and marking layer are made from food-contact-safe plastics. This composite structure maintains hygiene compliance while the specific selection of plastics provides enhanced chemical resistance to cleaning agents and mechanical resistance to stress, overcoming the limitation of conventional single-material approaches.
Solution Approach 2:
The patent changes the material parameters by selecting food-grade plastics with optimized chemical resistance properties. The materials are specifically chosen to withstand the chemical composition, temperature, and mechanical stress of cleaning processes used in food processing environments, maintaining both hygiene compliance and durability.
4Adaptability or versatility
If multi-layer boards with removable upper layers are used, then labeling flexibility is improved, but suitability for food processing machines is not evident and cleaning accessibility may be compromised
Solution Approach 1:
The patent uses a composite multi-layer structure where the marking layer is permanently bonded to the carrier layer through thermal processing. This provides labeling flexibility through the ability to create different markings while ensuring the structure maintains integrity during cleaning. The smooth surface and lack of gaps between layers ensure cleaning accessibility and prevent accumulation of residues.
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 durable and long-lasting identification solution that resists chemical and mechanical stress, preventing damage from cleaning agents and high-pressure cleaners, and ensures easy cleaning and hygiene compliance by maintaining the integrity of the marking without peeling or splintering, thus reducing the need for frequent replacements.
Implementation Method 1
the first plastic layer and the second plastic layer are thermally connected to one another
Data Source
Figure 1~2
Figure 3~4
AI summary
The panel (10) has an upper plastic layer (11) in a color, and a lower plastic layer (12) in another color. The lower plastic layer lies below the upper plastic layer. Recesses (13) are provided in the upper plastic layer for representation of characters and symbols by material removal. The recesses reach upto or into the lower plastic layer. The plastic layers are directly adjoined without application of an adhesion-promoting intermediate layer, and thermally connected with each other due to effect of heat and pressure on a molecular plane. An independent claim is also included for a method for manufacturing an identification panel.