Peel-to-open package with variable adhesive seal
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Solution Overview
Problem
Current peel-to-open packages, such as sachets, often experience momentum gain during opening, leading to unintentional ejection of products, particularly problematic for consumers with limited manual dexterity or vision in moist environments.
Innovation Solution
Designing packages with a variable adhesive pattern and grip tabs that provide controlled opening, featuring distinct peel forces and textures to prevent accidental separation and facilitate easy access to the product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If constant peel force seals are used along the longitudinal side edges, then the package can be easily peeled open, but momentum gain occurs causing unintentional complete separation and product ejection
Solution Approach 1:
The seal structure transitions from uniform constant peel force to a differentiated design with high peel force seals at ends and low peel force seals at intermediate portions. This local quality variation ensures that peeling initiates at the ends and progresses controllably through the package, preventing momentum gain and unintentional complete separation.
Solution Approach 2:
The peel force parameter is changed along the length of the seal, with high peel force at the ends and low peel force at intermediate portions. This parameter gradient allows controlled progression of the peel front, maintaining reliability while preserving ease of operation.
2Ease of operation
If high pulling force is exerted to overcome seal adhesion, then the package opens, but the product may be ejected some distance from the sachet
Solution Approach 1:
The seal structure transitions from uniform constant peel force to a differentiated design with high peel force seals at ends and low peel force seals at intermediate portions. This local quality variation ensures that peeling initiates at the ends and progresses controllably through the package, preventing momentum gain and unintentional complete separation.
Solution Approach 2:
The high peel force at the end seals creates preliminary resistance that must be overcome first, establishing controlled opening conditions before the peel progresses to the product-containing portion. This preliminary anti-action prevents excessive force from being applied directly to the product area.
3Ease of manufacture
If the package lacks distinct opening indicators and grip features, then manufacturing is simpler, but consumers with limited manual dexterity or vision struggle to open it
Solution Approach 1:
The package incorporates color variations in the seal regions, with different colors indicating high peel force vs. low peel force areas. This visual differentiation helps consumers with limited vision identify where to initiate peeling and understand the opening progression, improving accessibility without complicating manufacturing.
Solution Approach 2:
The seal is segmented into distinct functional regions (high peel force end seals and low peel force intermediate seals) with visual indicators. This segmentation provides clear opening instructions through the package structure itself, making it intuitive for consumers with limited manual dexterity or vision.
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
Ensures controlled opening and presentation of products, reducing accidental ejection and enhancing usability for consumers with limited dexterity or vision, especially in moist environments.
Implementation Method 1
The two layers of the package are removably attached by an adhesive pattern comprising: a first seal disposed proximate to the first end of the package; a second seal disposed proximate to the first opposing longitudinal side edge; and a third seal disposed proximate to the second opposing longitudinal side edge. Each seal is characterized by a peel force.
Implementation Method 2
At least one of the second and third seals has a variable peel force, meaning that the peel force increases between the first and second ends of the package.
Data Source
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AI summary
Improved peel-to-open packages (1000) including sachets, pouches, and the like are disclosed. The packages are made of substrate layers (10, 20) removably adhered together using an adhesive pattern of seal(s) that are characterized by peel forces. The adhesive pattern is designed to provide for controlled opening of the packages, in some embodiments to a predetermined stopping point, such that any product (s) contained therein are presented to the consumer for removal. Further design features include, but are not limited to, offset tabs (700A, 700B), textures, color variations and text, which may further provide for easy, intuitive opening.