Laminated Packaging With Offset Tear Strip Lines
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Solution Overview
Problem
Existing packaging for food and confectionery products is difficult to open due to the toughness of the materials used, which requires additional components and processes, reducing efficiency and increasing costs, and existing solutions for creating tear guides either compromise the integrity of the packet or are not easily accessible for all consumers.
Innovation Solution
A packaging system using a laminated material with an outer and inner laminate structure, featuring a tear strip with outer and inner lines of weakness that are offset and bonded in a peelable manner, allowing for easy opening without compromising the packet's integrity, and potentially being re-sealable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate tear strip component is attached to the wrapper, then the packet can be easily opened, but the device complexity and manufacturing cost increase due to additional components and processes
Solution Approach 1:
The tear strip is integrated directly into the wrapper material as an inherent feature rather than being a separate component. The wrapper material itself contains a tear guide formed by a line of weakness, eliminating the need for separate tear strip components and their attachment processes.
Solution Approach 2:
The wrapper material is designed to be self-opening through an inherent tear guide. The line of weakness is formed directly in the wrapper material during manufacturing, allowing the packet to be easily opened by the consumer without requiring additional components or complex structures.
2Ease of operation
If a separate tear strip component is attached to the wrapper, then the packet can be easily opened, but the productivity decreases due to reduced machine speeds during the attachment process
Solution Approach 1:
The line of weakness is formed in the wrapper material during the initial manufacturing process before the packaging operation. This preliminary formation of the tear guide eliminates the need for separate attachment processes that would reduce machine speeds and overall productivity.
Solution Approach 2:
The tear guide formation is merged with the wrapper manufacturing process itself. The line of weakness is created as part of the material fabrication or during the packaging operation, eliminating separate attachment steps and maintaining high machine speeds throughout the process.
3Strength
If the wrapper material is made tougher for durability, then the packet integrity is improved, but the ease of opening deteriorates as the material does not easily tear
Solution Approach 1:
The wrapper material has different properties in different locations. The majority of the wrapper maintains high strength and durability, while the tear guide line contains a line of weakness that allows easy tearing. This local differentiation enables both packet integrity and ease of opening.
Solution Approach 2:
The wrapper is functionally segmented into two regions: the main body material which is tough and durable, and the tear guide line which has reduced strength to facilitate opening. This segmentation allows the packet to maintain integrity during transport while enabling easy opening by consumers.
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
Enables easy and controlled opening of packages by consumers, including children and the elderly, while maintaining the packet's integrity until opened, and allows for re-closure, improving packaging efficiency and reducing costs by eliminating the need for additional components and processes.
Implementation Method 1
at least part of the tear strip defined in one of the outer and inner laminate structures being bonded to an overlapping region of the other of the outer and inner laminate structures in a peelable manner
Data Source
AI summary
A package (10) is formed from a flexible laminated wrapper (14) having an outer laminate structure (26) and an inner laminate structure (24) and includes a tear strip (30) formed in the wrapper. The tear strip has an outer tear strip portion (40) defined between a pair of outer spaced lines of weakness (42, 44) in the outer laminate structure. At least one inner line of weakness (48, 50) is formed in the inner laminate structure offset from the outer lines of weakness. At least a part (54) of the tear strip defined in one of the outer and inner laminate structures is bonded to an overlapping region of the other of the outer and inner laminate structures in a peelable manner. An inner tear strip portion (46) may be defined in the inner laminate structure (24) between a pair of spaced inner lines of weakness (48, 50).