Microembossed Flexible Bag Inner Surface Adhesion
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Solution Overview
Problem
Flexible packaging bags often experience adhesion issues with flowable materials, leading to incomplete emptying and inefficiencies in dispensing due to the materials sticking to the inner walls, making it difficult to remove the remaining fluid effectively.
Innovation Solution
The implementation of microembossing patterns on the inner surfaces of the flexible bag's plies, with specific size, pitch, and depth configurations (less than 25 μm, preferably less than 10 μm), which reduce adhesion and enhance dispensing efficiency by minimizing contact between the flowable material and the bag surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If smooth inner surfaces are used in flexible packaging bags, then manufacturing is simple and cost-effective, but flowable materials adhere strongly to the inner walls making complete emptying difficult
Solution Approach 1:
The patent applies microembossing to create a porous microstructure on the inner surface of the flexible bag. This microstructured surface reduces adhesion between flowable materials and the bag surface through reduced contact area, enabling more complete emptying while maintaining manufacturing feasibility through embossing processes
2Productivity
If microembossing patterns are added to reduce adhesion, then dispensing efficiency improves, but manufacturing complexity increases
Solution Approach 1:
The patent optimizes specific parameters of the microembossing structure including feature size (10-100 micrometers), depth (5-50 micrometers), and pitch (20-200 micrometers) to achieve effective adhesion reduction. These parameter optimizations balance the complexity of the microstructured surface with manufacturing capabilities and performance requirements
3Productivity
If deeper microembossing features are used, then adhesion resistance improves for thicker materials, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies an optimal depth range of 5-50 micrometers for microembossing features, with deeper features (closer to 50 micrometers) providing better performance for thicker materials like Greek yogurt. This parameter specification balances evacuation effectiveness with achievable manufacturing precision
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 microembossing patterns effectively reduce adhesion, allowing for improved dispensing and evacuation of flowable materials, with land percentages between 20% and 30% and deeper features providing better performance, especially for thicker materials like Greek yogurt, while maintaining a hydrophobic surface.
Implementation Method 1
microembossing patterns on the inner surfaces of the flexible bag's pl... reduce adhesion and enhance dispensing efficiency by minimizing contact between the flowable material and the bag surfaces
Data Source
AI summary
A flexible bag having an inner ply and an outer ply. The inner ply has a front panel and a back panel. At least one of the front and back panels having a microembossing on an inner surface thereof. A bag in box packaging having the flexible bag is likewise disclosed.