Adhesive Closure Strip for Hermetic Bulk Bag Sealing
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Solution Overview
Problem
Conventional bulk material product bags are not hermetically sealed, allowing air and contaminants to infiltrate, and the sewing process limits production speed and can cause handle structures to detach due to weight forces.
Innovation Solution
An adhesive closure strip is used, folded transversely across the open end of the bag, bonded to both sides to create a sealed state, which can match or exceed the bag's width and incorporate handle structures within the closure for enhanced sealing and reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sewing or stitching is used to secure closure strips, then the closure strip can be fixed to the bag, but the bag is not hermetically sealed and air/contaminants can infiltrate through needle holes
Solution Approach 1:
The patent replaces the mechanical sewing/stitching system with an adhesive bonding system. Instead of using needles and thread that create holes through the material, the invention applies adhesive to the closure strip and bag surface, then uses pressure and heat to bond them together, eliminating needle holes and achieving hermetic sealing without mechanical penetration
Solution Approach 2:
The patent changes the bonding parameters from mechanical (stitching with needle holes) to chemical/thermal (adhesive bonding with heat and pressure). The adhesive is applied in a controlled manner and then activated through thermal and pressure parameters to create a continuous seal that prevents infiltration while maintaining structural integrity
2Reliability
If sewing is used to attach closure strips, then the closure can be secured, but production speed is limited
Solution Approach 1:
The patent replaces the slow mechanical stitching process with a faster adhesive application and bonding process. The adhesive can be applied continuously along the closure strip edge, and the bonding process with heat and pressure can be performed more rapidly than manual or automated stitching, thereby increasing production speed while maintaining secure closure attachment
Solution Approach 2:
The adhesive is applied to the closure strip in advance during the manufacturing process, before the actual sealing operation. This preliminary application allows the adhesive to be positioned precisely and eliminates the need for slow stitching operations during final assembly, thereby improving production efficiency
3Strength
If sewing is used to attach handles to the bag, then handles can be secured, but weight forces can cause handle detachment
Solution Approach 1:
The patent replaces mechanical stitching for handle attachment with adhesive bonding. The adhesive creates a continuous bond between the handle and bag material without needle holes that could serve as failure points. Under weight forces, the adhesive bond distributes stress more evenly across the attachment area, preventing the detachment that can occur with stitched handles where individual stitches may fail
4Reliability
If adhesive closure strip extends beyond bag edges, then enhanced sealing and reinforcement are provided, but material usage increases
Solution Approach 1:
The patent applies the adhesive closure strip selectively at critical locations where enhanced sealing and reinforcement are needed, such as along the edges and at stress concentration points. The closure strip extends beyond the bag edges only in specific areas rather than uniformly, providing local enhancement of sealing and reinforcement while minimizing overall material usage
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
The adhesive closure effectively hermetically seals the bag, supports high-speed production, and integrates handles without compromising the bag's structural integrity by preventing force-induced detachment.
Implementation Method 1
an adhesive closure fixedly secured to a bulk material product bag. The adhesive closure comprises a strip which is adapted to effectively be folded in half, along its longitudinal extent, and which is adapted to be oriented transversely across an open end region of the bulk material product bag so as to be adhesively bonded to both the back and front sides of the bulk material product bag
Data Source
AI summary
A bulk material product bag has an adhesive closure strip fixedly secured thereon. As a result of the adhesive closure strip being oriented transversely across the normally open end region of the bulk material product bag so as to be adhesively bonded to both the back and front sides of the bulk material product bag, the adhesive closure strip effectively closes and seals the open end region of the bulk material product bag. Handle structure can also be integrally incorporated within the adhesive closure strip.