Co-extruded Multilayer Container Head with Barrier Layer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current containers with multilayer structures lack comprehensive barrier properties across both body and head regions, leading to inadequate protection against external factors like air and moisture, and existing methods for producing multilayer heads are energy-intensive, time-consuming, and limited in material compatibility.
Innovation Solution
A container with a multilayer structure featuring a co-extrusion process for producing the head, where a barrier layer is sandwiched between thermoplastic layers, allowing for easy connection and shaping, and a polymeric coating for enhanced barrier properties across the entire surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If single pressing in method is used to produce multilayer head, then each layer can be formed sequentially, but the process becomes energy-intensive and time-consuming
Solution Approach 1:
The patent combines multiple pressing operations into a single co-extrusion process where all layers are formed simultaneously in one step, eliminating the need for sequential pressing operations and significantly reducing production time and energy consumption
2Reliability
If EVOH barrier layer is placed between thermoplastic layers, then barrier properties are improved, but connection between layers becomes difficult
Solution Approach 1:
The patent modifies the connection process by heating the thermoplastic layers to their melting point, allowing them to bond effectively to the EVOH barrier layer through thermal softening, thus enabling reliable interlayer connection despite EVOH's inherent difficulty in bonding
3Shape
If crimping method is used to obtain tube head, then head shape can be formed, but material compatibility is limited
Solution Approach 1:
The patent employs co-extrusion technology to create a composite multilayer structure where different materials (thermoplastic layers and EVOH barrier layer) are extruded simultaneously and bonded together, enabling the use of diverse materials with complementary properties while forming the desired head shape
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 provides universal containers with complete barrier properties, enabling the use of diverse materials, simplifying the production of multilayer heads, and ensuring effective protection against external influences.
Implementation Method 1
a multilayer head of the container wholly extruded in the co-extrusion process
Implementation Method 2
The body has a multilayer structure, consisting of at least one barrier layer connected, on one side, to at least one thermoplastic layer heat sealed
Data Source
AI summary
The multilayer container includes a container body having a multilayer structure and a multilayer head of the container. The multilayer body of the container has at least one barrier layer connected, on one side, to at least one thermoplastic layer and heat sealed in a longitudinal overlapping joint formed of the edges of these layers. The body has its external surface covered with a polymeric coating, and the multilayer head of the container includes at least one non-metallic barrier layer connected, on one side, to at least one thermoplastic layer and is wholly extruded in the co-extrusion process. The essence of the invention is also a method for producing such a container.