Multilayer Film Segmented Core for Tear and Puncture Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing multilayer films struggle to balance puncture resistance and tear propagation resistance, often compromising on one property to enhance the other, leading to potential film failure during harsh transportation conditions.
Innovation Solution
A multilayer film design featuring a core layer with distinct tear-resistant and puncture-resistant lanes, coextruded with skin layers to form extrusion interfaces, providing enhanced resistance and stretch properties without adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multilayer film uses a single continuous core layer, then the film structure is simpler, but the film cannot simultaneously achieve both puncture resistance and tear propagation resistance
Solution Approach 1:
The core layer is divided into multiple distinct lanes (first lane, second lane, third lane) with different compositions and properties. This segmentation allows each lane to provide specific functions (e.g., puncture resistance, tear propagation resistance) that a single continuous layer cannot achieve simultaneously.
Solution Approach 2:
Different lanes within the core layer have different local properties and compositions tailored to specific requirements. For example, one lane may be optimized for puncture resistance while another lane provides tear propagation resistance, allowing the film to exhibit multiple resistance properties simultaneously.
2Strength
If the film uses adhesive bonding between layers, then the layers are well-connected, but the film becomes more complex and may fail under harsh transportation conditions
Solution Approach 1:
The extrusion interfaces between layers are merged to create strong bonds without requiring separate adhesive materials. The coextrusion process integrates multiple layers into a single unified structure where the interfaces provide both connection and functional differentiation.
Solution Approach 2:
The film layers bond to each other through the extrusion process itself, without requiring external adhesives. The extrusion interfaces create self-sufficient bonding that eliminates the need for additional bonding materials or processes.
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 film achieves improved tear and puncture resistance, reducing failure risks during transportation by integrating coextruded lanes that retard tear propagation and enhance overall film integrity.
Implementation Method 1
each of the first skin layer, the second skin layer, and the core layer are co-extruded together to form the multilayer film
Data Source
AI summary
A multilayer film includes a first skin layer, a second skin layer, and a core layer. The core layer includes at least two lanes of material. Each of the lanes of material of the core layer contacts each of the first skin layer and the second skin layer.