HDPE Pouring Element Barrier Design
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Solution Overview
Problem
Existing pouring elements for composite packages face challenges in achieving a strong gas and light barrier without the need for expensive barrier foils, which can create unevenness and non-sterile pockets, and are not cost-effective or easily recyclable.
Innovation Solution
A pouring element with a main body made of at least 92% HDPE, optimized with a specific weakening zone design and masterbatch additions for improved oxygen and light barrier properties, along with a polyolefin cutting element for stability and recyclability, eliminating the need for barrier foils and ensuring efficient separation and reclosure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If barrier foils are used to achieve strong gas and light barrier, then oxygen transmission rate is reduced and light barrier is improved, but cost increases and manufacturing complexity increases due to unevenness and non-sterile pockets
Solution Approach 1:
The invention extracts and removes the barrier foil layer from the composite package structure. Instead of using a separate barrier foil, the pouring element main body is made from HDPE material that inherently provides the gas and light barrier function, eliminating the need for additional barrier layers and their associated manufacturing complexities
Solution Approach 2:
The invention merges the barrier function into the pouring element main body by using HDPE material with specific properties. The main body simultaneously serves as the structural component and the barrier layer, combining multiple functions into a single element rather than requiring separate barrier foil layers
2Reliability
If barrier foils are used to achieve strong gas and light barrier, then oxygen transmission rate is reduced and light barrier is improved, but manufacturing cost increases
Solution Approach 1:
The invention extracts and removes the expensive barrier foil layer from the package structure. The HDPE main body of the pouring element provides the light barrier function inherently, eliminating the need for separate barrier materials and reducing overall manufacturing costs
Solution Approach 2:
The invention changes the material parameter of the pouring element main body to HDPE with specific properties (at least 92% HDPE content). This material parameter change enables the main body to provide both structural integrity and light barrier function, replacing the need for separate barrier foils and reducing manufacturing complexity
3Reliability
If barrier foils are used to achieve strong gas and light barrier, then oxygen transmission rate is reduced, but recyclability decreases and cost-effectiveness is reduced
Solution Approach 1:
The invention creates a homogeneous package structure where the pouring element main body is made entirely of HDPE material (at least 92% content). This homogeneity allows the entire pouring element to be easily recyclable with the package, eliminating the need to separate different material layers that would complicate recycling processes
Solution Approach 2:
The invention extracts and removes the barrier foil layer that complicates recycling. The HDPE main body provides oxygen barrier function inherently, allowing the entire package components to be made from recyclable materials without requiring separation of different material types
Data Source
AI summary
Illustrated and described is a pouring element for a composite package, includinga monolithic main body with a flange, a hollow cylindrical spout, which defines a central axis, and a closure part formed in the spout, which runs substantially orthogonal to the central axis, with a weakening zone,a hollow cylindrical cutting element movably guided in the spout with at least one cutting tooth for severing the weakening zone to open the spout and composite package,a reclosable screw cap, which serves to drive the cutting element when the composite package is opened for the first time. Two alternative composite packages for liquid foodstuffs are also described, which are provided such that a pouring element according to the invention is integrated into the gable region of the composite package. An overall more favourable alternative of a pouring element without additional barrier foil is designed such that the main body consists of at least 92% by weight of HDPE and according to ASTM D3985 has an oxygen transmission rate between 12 and 23 ml O2/(m2*day), measured through a measuring surface which is orthogonal to the central axis and runs through the flange of the main body.