Folded Sealed Paper Bag Structure for Leak-Resistant Bottom Closure
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Solution Overview
Problem
Existing sealed bags face issues with excessive material use, insufficient sealing performance, complex manufacturing processes, poor user experience, and structural imbalances leading to deformation, breakage, and leakage, which affect stability, portability, and production efficiency.
Innovation Solution
A folding process for sealed bags involving preset folding baselines, plastic sealing, and side pressing to form symmetrical closings with balanced surface areas, ensuring strong structure and sealability, optimized for compact storage and user convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If traditional sealed bag design is used, then manufacturing is simple, but material use is excessive and sealing performance is insufficient
Solution Approach 1:
The sealed bag is divided into multiple functional zones including first and second folding portions, sealing portions, and closing structures. This segmentation allows precise material placement and reduces overall material consumption while maintaining structural integrity and ease of manufacturing through modular assembly.
2Reliability
If traditional sealing method is used, then manufacturing is simple, but sealing performance is insufficient causing leakage
Solution Approach 1:
The sealing structure incorporates localized sealing portions with specific width measurements (3-8cm) positioned at critical areas where sealing is needed. This local quality approach enhances sealing performance at specific points without requiring complex sealing mechanisms throughout the entire bag structure.
Solution Approach 2:
The folding portions are pre-formed and positioned before final sealing, creating a predetermined structure that guides the sealing process. This preliminary action ensures proper alignment and contact between sealing surfaces, improving sealing reliability while maintaining relatively simple manufacturing procedures.
3Stability of the object's composition
If asymmetric bag structure is used, then design is simple, but bag deforms or breaks during use affecting stability
Solution Approach 1:
The sealed bag employs asymmetric folding patterns where the first folding portion and second folding portion have different configurations relative to the sealing portion. This controlled asymmetry optimizes structural stability during use while maintaining design simplicity through clear geometric relationships between components.
4Reliability
If bottom seal is not tight enough, then manufacturing is simple, but contents leak affecting product safety
Solution Approach 1:
The bottom sealing area incorporates a dedicated sealing portion with specific dimensional parameters (width of 3-8cm) positioned at the bottom closure area. This localized enhancement of sealing quality prevents leakage at the critical bottom seal without requiring complex sealing mechanisms throughout the entire manufacturing process.
5Reliability
If complex opening and closing design is used, then sealing performance is improved, but user experience deteriorates
Solution Approach 1:
The closing mechanism is segmented into first and second closings with distinct folding portions that can be independently manipulated. This segmentation simplifies user interaction by allowing step-by-step opening and closing operations while maintaining strong sealing performance through the distributed sealing portions at each closing point.
6Strength
If excessive material is used for sealed bag, then structural strength is improved, but portability deteriorates
Solution Approach 1:
The bag structure is segmented into functional zones with material concentrated where structural strength is needed (folding portions, sealing areas) and minimized in non-critical areas. This selective material distribution maintains necessary structural strength while reducing overall bag weight and improving portability.
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 process results in sealed bags with enhanced capacity, quality, and durability, improving practicality, reducing costs, and enhancing brand image through efficient production and user-friendly design.
Implementation Method 1
performing a first plastic sealing on a gap between an overlapping area of the second folding portion and the first folding portion
Implementation Method 2
performing side pressing on the paper roll along a first side pressing line preset on the paper roll so that the paper roll is embedded to form a first closing
Data Source
AI summary
Disclosed is a sealed bag and a processing method thereof, the method including presetting a folding baseline on a base paper piece, and performing a first plastic sealing on a gap between an overlapping area of the second folding portion and the first folding portion so as to form a paper roll; supporting the paper roll so as to perform side pressing on the paper roll so that the paper roll is embedded to form a first closing and a third folding line, wherein the area between the first folding line and the first side pressing line serves as a bottom surface of the first closing, and the area between the first side pressing line and the third folding line serves as a top surface of the first closing; plastically sealing the bottom opening of the fully pressed paper roll to form a finished sealed bag.