Reclosable Storage Bag with Perforated Adhesive Seal
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Solution Overview
Problem
Conventional storage bags fail to effectively minimize air contact with contents, leading to issues like freezer burn in frozen environments, and lack a reliable, reusable closure mechanism for maintaining an airtight seal.
Innovation Solution
The storage bag design features two opposing sidewalls with a composite material structure, including a pressure-sensitive adhesive layer that adheres upon pressure application, and a perforated layer to prevent premature adhesion, combined with a reusable closure system for reclosable sealing, ensuring minimal air contact and effective sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional storage bags are used to contain food items, then the bags can provide basic containment, but they fail to effectively minimize air contact with contents leading to freezer burn
Solution Approach 1:
The storage bag is divided into multiple layers including an outer layer, an inner layer, and a barrier layer. Each layer serves a specific function: the outer layer provides structural integrity, the inner layer contacts the food item, and the barrier layer minimizes air contact and prevents freezer burn. This segmentation allows the bag to effectively address air contact issues while maintaining reliability.
Solution Approach 2:
The storage bag employs a composite structure combining multiple materials with different properties. The outer layer may be made of a durable material like polyethylene, the inner layer of a food-safe material, and the barrier layer of a material with low permeability to air and moisture. This composite material approach enables the bag to simultaneously provide containment, minimize air contact, and protect against freezer burn.
2Reliability
If storage bags lack a reclosable closure mechanism, then the bags are simpler in design, but they cannot provide reusable airtight sealing
Solution Approach 1:
The closure mechanism utilizes flexible sealing elements made from thin film materials that can conform to the bag opening and create an airtight seal. These flexible seals allow the bag to be opened and closed multiple times while maintaining reliability of the airtight seal, without requiring complex mechanical components.
Solution Approach 2:
The reclosable closure mechanism incorporates dynamic elements such as zippers or snap closures that can be easily opened and closed. The sealing elements are designed to be flexible and adaptable, allowing the closure to maintain an airtight seal while accommodating repeated opening and closing operations. This dynamic design provides reliability without excessive complexity.
3Reliability
If adhesive is applied directly to interior surfaces of storage bags, then the adhesive can provide sealing, but it may come into contact with stored items causing contamination
Solution Approach 1:
The adhesive application is segmented and localized to specific regions of the bag, such as the sealing edges or flaps, rather than being applied broadly across interior surfaces. This segmentation ensures that the adhesive provides effective sealing while remaining in areas that do not contact stored items, thus preventing contamination while maintaining sealing reliability.
Solution Approach 2:
The adhesive is applied with local quality considerations, meaning it is placed only where sealing is needed and in amounts sufficient for effective sealing. The interior surfaces that contact stored items are kept free of adhesive, while the sealing regions receive adequate adhesive application. This localized approach maintains sealing effectiveness without causing contamination.
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 design effectively minimizes air contact with contents, preventing freezer burn and maintaining an airtight seal, enhancing the preservation of stored items by using a composite material structure with pressure-sensitive adhesive and perforations to manage adhesion, and a reclosable closure system for reliable sealing.
Implementation Method 1
a pressure-sensitive adhesive layer that adheres upon pressure application
Implementation Method 2
a perforated layer to prevent premature adhesion
Data Source
AI summary
The storage bag includes two sidewalls with peripheral edges and the sidewalls being attached together along at least a portion of the peripheral edges. One or more additional sidewalls may be disposed within the bag, and these additional sidewalls may be connected to form an inner bag. Any inner bag sidewalls may be laminated to the outer bag sidewalls or hang loose from the outer bag sidewalls. One or more of the sidewalls may include an adhesive for adhering to an opposing sidewall or item in the bag, a thin perforated layer disposed over an adhesive, a line of perforations for tearing, and/or one or more perforations for venting. Furthermore, processes for manufacturing a storage bag are disclosed.