Bag-like Package Blank with Melted Edge Thickenings
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Solution Overview
Problem
Existing methods for manufacturing bag-like package blanks are costly and demanding in terms of material and equipment, requiring skilled operators and resulting in high friction and potential jamming issues during processing.
Innovation Solution
A bag-like package blank is created using a sheet of material with carrier strips made of plastic film with thickened portions, which are easier to manufacture and reduce friction, combined with a method involving static electricity and heat treatment to attach and fold the material into a continuous form, allowing for efficient production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional methods are used to provide edge thickenings on package blanks, then the package blanks can be manufactured with sufficient structural integrity, but the manufacturing cost increases and the process becomes more complex
Solution Approach 1:
The invention changes the material parameters by using a thermoplastic film that can be locally melted and bonded. By controlling the thermal parameters during the sealing process, the edge portions are melted and formed into thickenings that provide structural integrity without requiring complex manufacturing equipment or multiple material layers.
Solution Approach 2:
The invention utilizes the phase transition of thermoplastic material from solid to molten state during sealing. The edge portions are heated to melt the thermoplastic film, allowing it to be formed into thickenings that solidify upon cooling, providing the necessary structural strength while using a simple single-step process.
2Strength
If thickened edge portions are made solid and stiff, then the package blanks can resist deformation, but the friction increases and jamming may occur in packaging devices
Solution Approach 1:
The invention applies local quality by creating thickenings only at specific edge portions where structural support is needed, while keeping the rest of the package blank thin and flexible. The thickenings are formed by melting and bonding only the edge portions of the thermoplastic film, providing localized stiffness without increasing friction across the entire package surface.
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 solution results in a more cost-effective and easier-to-manufacture package blank with reduced friction and jamming, enabling smoother processing and lower production costs.
Implementation Method 1
The plastic film may be applied as an extruded warm plastic strand, wherein the thermal content is adapted to melt a part of or all of the plastic film material which is adapted to support the plastic strand.
Implementation Method 2
The method comprises the steps of attaching a first carrier strip at a first outer edge of sheet of material by means of static electricity
Implementation Method 3
securing the first carrier strip to the first outer edge of sheet of material by means of heat treatment
Data Source
Figure 1A~1B
Figure 1C
Figure 2A~2B
AI summary
The invention relates to a bag-like package blank (1) comprising a sheet of material (2) having at least four outer edges (3, 4, 5, 6) which is folded to be shaped into the bag-like package blank (1), a first carrier strip (7) arranged along a first outer edge (3) of the folded sheet of material (2), and a second carrier strip (8) arranged along a second outer edge (4) of the folded sheet of material (2). The invention also relates to a method for manufacturing a continuous bag-like package blank (1).