Vacuum Packaging Films with Cavernous Structures for Gas Evacuation
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Solution Overview
Problem
Vacuum packaging films with smooth inner surfaces tend to stick together during evacuation, leading to air pockets and degraded seal integrity, while embossed patterns can be less durable and consume more material, resulting in thicker, heavier films with fewer channels for gas evacuation.
Innovation Solution
A multi-layer film with a patterned inner layer featuring protruding cavernous structures arranged to form channels for gas evacuation, coupled with a flat outer layer, reduces material usage and maintains durability, allowing for effective gas evacuation and hermetic sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If embossed patterns are applied to vacuum packaging film to prevent sticking, then seal integrity is improved, but film durability deteriorates and material consumption increases
Solution Approach 1:
The patent applies porous materials by creating cavernous structures with hollow cavities within the film layers. These cavities form channels that prevent bag surfaces from sticking together during vacuum packaging while using less material than traditional embossed patterns, thereby maintaining seal integrity without compromising film durability
Solution Approach 2:
The patent transitions from traditional two-dimensional embossed surface patterns to three-dimensional cavernous structures with internal hollow cavities. This dimensional change allows the formation of effective evacuation channels while reducing the concentration of raised areas on the surface, preventing sticking without requiring thick embossing that would compromise durability
2Reliability
If thicker embossing is used to prevent sticking, then seal integrity is improved, but film thickness increases and compactness deteriorates
Solution Approach 1:
The cavernous structures with hollow cavities create effective evacuation channels using minimal material thickness. The porous internal structure provides sufficient channel formation without requiring thick embossing, maintaining film compactness while preventing bag surface sticking during vacuum packaging
Solution Approach 2:
By creating three-dimensional cavernous structures with internal cavities rather than relying on thick surface embossing, the patent achieves effective channel formation with reduced film thickness. This dimensional approach allows thin film construction that remains compact while providing adequate sticking prevention
3Object-affected harmful factors
If high concentration of raised areas is used to form channels, then sticking prevention is improved, but the number of channels decreases and air pockets form
Solution Approach 1:
The cavernous structures create a porous internal network with hollow cavities that form numerous interconnected channels. This porous structure provides sufficient channel density to prevent sticking while maintaining adequate gas evacuation pathways, avoiding air pocket formation that occurs with high concentration surface embossing
Solution Approach 2:
The patent uses three-dimensional cavernous structures with internal cavities to create channels throughout the film thickness rather than concentrating raised areas on the surface. This dimensional distribution creates sufficient channel density for sticking prevention while maintaining open pathways for gas evacuation, preventing air pocket formation
Data Source
AI summary
The present invention teaches a film having a pattern of protruding structures. When used in the vacuum packaging bag material context, the result is a vacuum packaging bag that a consumer can effectively evacuate and hermetically seal. The protruding structures tend to form channels that enable gas to evacuate from within a vacuum packaging bag. In certain embodiments, the protruding structures are formed only on an inner side of the vacuum packaging film, typically through a hot casting or heat-extrusion process. As a result, far less bag material is required than in the prior art patterned film formed through cold embossing processes. The present invention also contemplates a variety of applications for the films, including preformed bags and bag rolls, as well as a variety of apparatus for manufacturing the films and appliances for utilizing the bags and bag rolls.