Duplicative Thermoplastic Bag Seals for Leak-Resistant Thin Films
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Thermoplastic bags with thinner films face issues of reduced strength and increased susceptibility to leaks at seams, leading to potential liquid spillage during disposal, which deters consumers and increases manufacturing costs.
Innovation Solution
Implementing duplicative seals along the edges of thermoplastic bags, where multiple seals reinforce the same area, ensuring that if one seal fails, others remain intact to prevent leaks, thereby maintaining bag strength and resistance to leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If thinner thermoplastic films are used to reduce material cost, then material usage and manufacturing cost decrease, but bag strength and leak resistance deteriorate
Solution Approach 1:
The side seal is divided into multiple separate seal segments (first seal, second seal, third seal, fourth seal) arranged in sequence along the side edge. Each seal segment is separated by a gap, creating a segmented sealing structure that distributes stress and prevents single-point failure, thereby maintaining leak resistance with thinner films
Solution Approach 2:
The sealing structure transitions from a single-line seal to a multi-dimensional array of seal segments distributed along the side edge. By adding the dimensional aspect of multiple separated seal segments rather than one continuous seal, the structure achieves enhanced reliability and strength distribution while using thinner material
2Ease of manufacture
If thinner thermoplastic films are used to reduce material cost, then manufacturing cost decreases, but susceptibility to seam failure and leakage increases
Solution Approach 1:
Multiple seal segments are pre-positioned along the side edge before the bag is put into service. These redundant seal segments act as a backup system, cushioning against the risk of seam failure. If one seal segment fails, the other segments remain intact to prevent leakage, thereby maintaining reliability with cost-effective thinner films
3Reliability
If duplicative seals are added to reinforce bag strength, then leak resistance improves, but device complexity and manufacturing complexity increase
Solution Approach 1:
The sealing system is segmented into multiple discrete seal segments (first, second, third, fourth seals) with defined gaps between them. This segmentation provides redundancy and improved leak prevention while maintaining a relatively simple manufacturing process, as each segment can be formed independently during the sealing operation
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 duplicative seals provide enhanced strength and leak prevention, allowing the use of thinner films without compromising the bag's integrity, thus reducing material usage and manufacturing costs while maintaining consumer satisfaction.
Implementation Method 1
a first seal securing at least two plies of thermoplastic film together along a first portion of the thermoplastic bag. The thermoplastic bag also includes a second seal securing the at least plies of thermoplastic film together along the first portion of the thermoplastic bag.
Data Source
AI summary
A thermoplastic bag includes duplicative seals. In particular, in one or more implementations, a thermoplastic bag includes a first seal and at least a second seal reinforcing the same area of the thermoplastic bag. For instance, in one or more implementations, the thermoplastic bag includes multiple seals along each side edge or along the hem. If one seal fails, the other seal(s) can remain in place to prevent leaks. Thus, the duplicative seals of the thermoplastic bag can provide reinforced strength and desired aesthetics.