Recyclable Wipe Package Segmentation for Polymer Separation
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Solution Overview
Problem
Current disposable wipes packaging designs face challenges in recyclability, particularly due to the integration of fitments and adhesives, which hinder the separation of polymer materials during recycling, leading to reduced quality and quantity of recyclates.
Innovation Solution
A packaging design for disposable wipes that includes a dispensing fitment made of one polymer composition and a flexible package body made of another, both predominantly composed of polyethylene (PE) or polypropylene (PP), with adhesives and lamination hardeners, ensuring at least 80% recyclability by weight and compatibility with specific recycling streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a fitment is integrated into the flexible package body using adhesives, then the package structure is strengthened and functionality is improved, but the separation of polymer materials during recycling becomes difficult, reducing recyclate quality
Solution Approach 1:
The package is divided into two main segments: a rigid fitment made of one polymer type (e.g., PP) and a flexible package body made of another polymer type (e.g., PE). This segmentation allows each part to be optimized for its specific function while enabling separate recycling streams, as the distinct polymer types can be separated during recycling despite the adhesive bonding during use.
Solution Approach 2:
Different polymer materials are assigned to different parts of the package based on local functional requirements. The fitment requires rigidity and is made from PP or similar rigid polymers, while the flexible package body requires flexibility and is made from PE or similar flexible polymers. This local quality differentiation improves both structural performance and recyclability.
2Adaptability or versatility
If different polymer materials are used for the fitment and flexible package body, then functional requirements are met, but separation of materials for recycling requires substantial effort
Solution Approach 1:
The package structure is segmented into distinct components (fitment and flexible package body) made from different polymer types. This segmentation enables the use of optimal materials for each function while facilitating separation during recycling, as the different polymer types can be identified and separated using standard recycling processes.
Solution Approach 2:
The invention changes the material composition parameters by using fitments made from rigid polymers (PP, PS, etc.) and flexible package bodies made from flexible polymers (PE, PP, etc.). This parameter differentiation not only meets functional requirements but also enables easier separation during recycling, as the distinct polymer types can be sorted using standard recycling infrastructure.
3Ease of operation
If the package includes both fitment and flexible package body made of different polymers, then user-friendly functionality is achieved, but recyclability is reduced below 80%
Solution Approach 1:
The package is segmented into a rigid fitment and flexible package body made from different polymer types that are commonly recycled separately (e.g., PP fitment with PE flexible body). This segmentation maintains functional versatility while ensuring that both components can be recovered through standard recycling streams, achieving over 80% recyclability.
Solution Approach 2:
Each part of the package is assigned a specific polymer material optimized for its local function: rigid polymers for the fitment providing structural support and dispensing function, and flexible polymers for the package body providing flexibility and sealability. This local quality optimization ensures both functionality and high recyclability through separate polymer streams.
Data Source
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AI summary
The present invention is related to for disposable wipes. The packages comprise a dispensing fitment and a flexible package body. The packages comprise at least 80% by weight of the total package of one polymer type selected from the group consisting of polyethylene (PE) and polypropylene (PP); and exhibits a recyclability of at least 80% in either the HDPE stream and/or the LDPE stream; or the PP rigids stream and/or the PP flexibles stream.