Ribbed Spout Structure for Welding Mono-Material Packaging Bags
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Solution Overview
Problem
Mono-material packaging bags made of polyethylene-based resin face issues with thermal weldability when a spout is adhered, leading to reduced productivity and appearance degradation.
Innovation Solution
A spout design with four or more parallel ribs on the outer peripheral part, each 1 mm or more in width, and a satin finish on the rib surfaces, welded to a polyethylene-based packaging bag, ensuring excellent weldability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spout is adhered to a mono-material packaging bag made of polyethylene-based resin, then the packaging bag can be sealed and used, but thermal weldability deteriorates leading to reduced productivity and degraded appearance
Solution Approach 1:
The attachment part of the spout is divided into multiple ribs (four or more) that are parallel to each other. This segmentation creates multiple localized welding points along the attachment part, allowing the packaging bag to be welded to the spout at multiple positions simultaneously or sequentially, thereby maintaining thermal weldability while enabling efficient production.
Solution Approach 2:
The ribs are designed with specific dimensional characteristics (width of 1 mm or more) and surface properties (satin finish) to create localized areas with enhanced welding properties. The satin finish on the rib surfaces provides a rough texture that increases surface area and improves thermal contact during welding, ensuring reliable welds at specific locations without affecting the overall packaging bag integrity.
2Reliability
If a spout is adhered to a mono-material packaging bag, then sealing is achieved, but appearance quality deteriorates
Solution Approach 1:
By segmenting the attachment part into multiple ribs, the design allows for a more distributed and uniform welding pattern that preserves the aesthetic appearance of the packaging bag. The parallel ribs create a regular, organized pattern that can be visually appealing while ensuring comprehensive sealing.
Solution Approach 2:
The satin finish is applied specifically to the rib surfaces that will be welded to the packaging bag. This localized surface treatment creates a rough texture that improves welding performance while the overall rib structure and its integration into the spout design maintain the aesthetic quality of the final product.
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 spout and packaging container achieve stable and efficient thermal weldability, enhancing productivity and appearance quality for mono-material packaging bags.
Implementation Method 1
a spout to be welded to a packaging bag and including an attachment part welded to the packaging bag
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A spout (10) is to be welded to a packaging bag (20) and includes an attachment part (12) welded to the packaging bag (20), and a pouring part (11) protruding to the outside of the packaging bag (20) from the attachment part (12). An outer peripheral part (13) of the attachment part (12) welded to the packaging bag (20) has four or more ribs (14), each having a width of 1 mm or more, which are parallel to each other in a direction in which the pouring part (11) protrudes from the attachment part (12).