Vacuum Packing Bag Staggered Embossments Air Evacuation
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Solution Overview
Problem
Conventional vacuum packing bags often trap air pockets due to the design of embossments or ridges, leading to incomplete evacuation, increased manufacturing complexity and cost, reduced strength, and longer evacuation times.
Innovation Solution
A plastic bag design featuring a flat first film and an embossed second film with staggered and parallel embossments that form intercommunicating channels for efficient air exit, eliminating air pockets and enhancing strength while simplifying manufacturing and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If embossments are formed on both plastic films to create air discharge paths, then air evacuation is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The embossments are segmented into multiple lines arranged in a staggered pattern, where each line of embossments creates individual air discharge paths that collectively cover the entire bag surface. This segmentation allows effective air evacuation without requiring embossments on both films
Solution Approach 2:
Instead of forming embossments on both films (conventional approach), the invention forms embossments on only one film (inverted approach). The staggered arrangement of embossment lines on the single film compensates for the reduced complexity while maintaining effective air discharge capability
2Reliability
If ridges are densely covered on one plastic film to prevent internal cavities, then air pocket formation is reduced, but evacuation time increases and bag strength decreases
Solution Approach 1:
The embossments are arranged in multiple staggered lines across the film surface, creating a two-dimensional pattern of air discharge paths. This dimensional arrangement ensures comprehensive coverage to prevent air pockets while maintaining open pathways for efficient air flow
Solution Approach 2:
The embossments are arranged at specific intervals rather than continuously, creating localized discharge paths. This local quality approach allows air to be evacuated efficiently through distributed pathways while preserving the overall structural integrity and strength of the bag
3Adaptability or versatility
If diagonal or curvilinear ridges are used to adapt for sealers, then sealing compatibility is improved, but air extraction linearity is reduced and evacuation time increases
Solution Approach 1:
The embossments are pre-formed on the film before sealing, creating ready-made air discharge paths. The staggered linear arrangement is predetermined to work optimally with standard sealers, eliminating the need for diagonal or curvilinear configurations that would compromise evacuation efficiency
4Productivity
If venting strips are added to assist air evacuation, then air extraction is improved, but manufacturing complexity increases and cleaning becomes difficult
Solution Approach 1:
The air evacuation function is merged directly into the film structure through embossments, eliminating the need for separate venting strips. The embossments are integrated into the film during manufacturing, creating a unified structure that is both simple to manufacture and easy to clean
Data Source
AI summary
The plastic bag for vacuum packing provided by the present invention has embossments which space in longitudinal direction and stagger in transverse direction formed on the inner surface, and thus lots of intercommunicate channels are formed so as to eliminate the possibility to form any air pocket or internal cavity. Meanwhile, air linearly exits from the bottom to the open end, so it takes less time to evacuate the bag. Further, the bag only has one film be embossed, and thus the manufacturing process thereof is simplified and at low cost, and the bag is easy to wash. Moreover, the strength of the bag provided by the present invention is enhanced; especially the anti-avulsion capability is well improved.