Polyolefin-Coated Paper Packaging for Mesh Welding
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Solution Overview
Problem
The existing packaging materials for fruits and vegetables, primarily made of polyethylene or polypropylene, face issues with compatibility for heat sealing, leading to plastic residue deposition on heaters and excessive plastic usage, which requires frequent cleaning and contributes to environmental concerns.
Innovation Solution
A packaging material composed of a continuous paper band coated with polyolefin, where the polyolefin-coated side is directly welded to mesh elements, allowing for effective joining and reducing plastic consumption by using paper instead of additional plastic layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyethylene or polypropylene foil is used for packaging, then the packaging material provides good barrier properties and is commonly used in the industry, but it causes plastic residue deposition on heaters during heat sealing and requires frequent cleaning
Solution Approach 1:
The patent extracts the problematic plastic coating from the packaging material by using a mesh structure that eliminates the need for plastic foil layers. The mesh alone serves as the packaging material, removing the source of plastic residue deposition on heaters during heat sealing operations.
Solution Approach 2:
The patent changes the fundamental parameter of the packaging material from solid plastic foil to a mesh structure. This parameter change transforms the material from one that deposits residues on heaters to one that allows air passage and eliminates the harmful deposition effect.
2Reliability
If polyethylene or polypropylene foil is used for packaging, then the packaging material provides good barrier properties, but it contributes to excessive plastic usage and environmental concerns
Solution Approach 1:
The patent removes plastic material from the packaging structure by using a mesh that provides the necessary packaging function without requiring plastic foil layers. This extraction of plastic eliminates excessive plastic usage and addresses environmental concerns while maintaining packaging effectiveness.
Solution Approach 2:
The patent fundamentally changes the material parameter from plastic-based to mesh-based packaging. This parameter change reduces the quantity of plastic substance used while maintaining the essential packaging barrier properties through the mesh structure's design.
3Adaptability or versatility
If mesh elements are joined to foil by welding through overlapping areas, then the joining method solves the compatibility issue between different materials, but it requires additional plastic strips and increases device complexity
Solution Approach 1:
The patent eliminates the need for additional plastic strips by using the mesh structure itself as the joining element. The mesh provides both the packaging function and the joining function, removing the complexity of multi-layer plastic constructions and additional bonding materials.
Solution Approach 2:
The mesh structure serves multiple functions simultaneously: it provides the packaging barrier, enables material joining through its own structure, and eliminates the need for separate plastic bonding strips. This multi-functionality reduces device complexity while maintaining material compatibility.
4Productivity
If heat sealing method is used for packaging, then the packaging process is efficient and commonly employed, but it causes depositing of plastic foil residues on the heaters requiring frequent cleaning
Solution Approach 1:
The patent extracts the plastic foil component from the packaging material, leaving only the mesh structure. This extraction eliminates the source of residues that would otherwise be deposited on heaters during heat sealing, allowing the heat sealing process to continue without frequent cleaning interruptions.
Solution Approach 2:
The patent changes the material parameter from plastic foil to mesh, fundamentally altering how the heat sealing process interacts with the packaging material. This parameter change eliminates the residue deposition effect while maintaining the efficiency of heat sealing as a packaging method.
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 solution significantly reduces plastic usage, prevents foil deposits on heaters, and increases packaging machine efficiency by allowing higher welding temperatures and speeds, enhancing production output and environmental sustainability.
Implementation Method 1
the continuous band is directly bonded on its polyolefin coated side with the mesh elements by welding
Data Source
AI summary
The invention relates to a material designed for production of packaging which has the form of a continuous band joined by welding with overlapping mesh elements, wherein this continuous band (1) is made of paper coated with polyolefin on at least one side. The polyolefin coating allows joining the paper with the mesh (2) by means of the welding method. The invention also relates to the method of producing the packaging material in the form of a continuous band containing mesh elements consists in coating of at least one side of continuous paper band with polyolefin, then placing the mesh on the coated side of paper in such a manner that the part of it is superimposed on the paper and forms an overlap, and finally this part is subjected to welding at the temperature within the range of 180 - 300°C.