Thermoplastic bags with ribbed strainable network
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Solution Overview
Problem
Thermoplastic films used in commercial and consumer products face challenges in maintaining durability and quality while reducing material costs, leading to customer perceptions of lower strength and quality due to thinner gauge materials.
Innovation Solution
The implementation of thermoplastic films with patterns of raised rib-like elements and web areas, lacking sharp corners, which create a strainable network providing enhanced dart impact resistance and elastic-like behavior, thereby increasing strength and reducing the likelihood of holes and tears.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If thinner gauge thermoplastic film is used to reduce material cost, then production cost decreases, but durability and strength deteriorate
Solution Approach 1:
The film is segmented into multiple functional layers: a base thermoplastic film layer and an integrated elastic layer. This segmentation allows each layer to perform its specific function - the base layer provides structural integrity while the elastic layer provides flexibility and impact resistance - thereby achieving both cost reduction through thinner material and maintained strength through functional specialization.
Solution Approach 2:
The invention uses composite materials by combining thermoplastic film with elastic materials in a multi-layer structure. The elastic layer is integrated into the thermoplastic film through lamination or co-extrusion, creating a composite material that exhibits both the cost-effectiveness of thin thermoplastic and the durability of elastic components, thus resolving the contradiction between material reduction and strength maintenance.
2Ease of manufacture
If thinner gauge film is used to control manufacturing costs, then production cost decreases, but customer perception of quality deteriorates
Solution Approach 1:
The elastic layer is strategically positioned at specific locations within the film structure where impact resistance is most needed. This local quality enhancement provides durability exactly where required while maintaining overall thinness and cost-effectiveness, thereby improving customer perception without significantly increasing manufacturing cost.
Solution Approach 2:
The invention changes the physical parameters of the film by integrating an elastic layer that alters the film's mechanical properties. This parameter change enables the thin film to exhibit enhanced strength and flexibility, improving customer perception of quality while maintaining cost-effectiveness through the use of thin base material.
3Strength
If elastic materials are added to provide strength and flexibility, then film strength improves, but device complexity increases
Solution Approach 1:
The elastic layer is merged with the thermoplastic film through lamination or co-extrusion processes, creating an integrated multi-layer structure. This merging approach combines the strength benefits of elastic materials with the cost-effectiveness of thin thermoplastic while managing complexity through a standardized layered architecture that can be manufactured using existing equipment.
Solution Approach 2:
The invention uses thin film structures for both the thermoplastic base layer and the elastic layer, maintaining overall thinness while achieving enhanced properties. This flexible shell approach allows the film to remain thin and cost-effective while the integrated elastic layer provides the necessary strength and flexibility, balancing performance with simplicity.
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 described solution enhances the dart impact resistance of thermoplastic films and bags, providing improved durability and customer perception of quality by distributing stress concentrations and preventing tears, while maintaining cost-effectiveness.
Implementation Method 1
the pattern of raised rib-like elements and web areas, lacking sharp corners, which create a strainable network providing enhanced dart impact resistance and elastic-like behavior, thereby increasing strength and reducing the likelihood of holes and tears
Implementation Method 2
create a strainable network providing enhanced dart impact resistance and elastic-like behavior
Implementation Method 3
The interspersed motifs and/or the lack of sharp corners in the web areas serve to increase dart impact resistance of the thermoplastic bags
Data Source
AI summary
The present disclosure relates to thermoplastic bags with enhanced dart impact resistance. In particular, in one or more embodiments, the disclosed thermoplastic bags include a first sidewall and a second sidewall joined together along a first side edge, a second side edge, and a bottom edge, while having an opening opposite the bottom edge. Furthermore, in some embodiments, the disclosed thermoplastic bags have a pattern of raised rib-like elements and web areas formed in the first sidewall. In one or more embodiments, the pattern of raised rib-like elements and web areas comprises a first motif of deformations that repeats in the pattern and a second motif of deformations interspersed with the first motif of deformations within the pattern. In one or more embodiments, the web areas lack sharp corners. The interspersed motifs and/or the lack of sharp corners can serve to increase dart impact resistance of the thermoplastic bags.