Water-Based Adhesive Sealing for Medical Packaging
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Solution Overview
Problem
Existing adhesive compositions for packaging medical items are prone to non-uniform coating and leakage, which compromises the sterility and integrity of the packaging, as they are susceptible to delamination and premature peeling.
Innovation Solution
A design control water-based adhesive composition using a combination of polymers such as acrylonitrile butadiene, polyamide, and ethylene vinyl acetate, applied in multiple layers via a printing press, ensuring a robust and uniform seal on substrates like TYVEK, paper, or film, with additives like tackifiers and antimicrobial agents to enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single coating of adhesive is applied and pressure sealed, then the sealing process is simple and quick, but the seal is susceptible to non-uniform coating and leakage
Solution Approach 1:
The adhesive sealing system is segmented into multiple functional layers: a first adhesive layer applied to the first substrate, a second adhesive layer applied to the second substrate, and an intermediate layer between them. This segmentation allows each layer to perform its specific function optimally, ensuring uniform coating and reliable sealing while maintaining efficient production.
2Reliability
If adhesive is applied to form a seal, then the package is sealed to maintain sterility, but the adhesive may delaminate and peel prematurely
Solution Approach 1:
The sealing system uses composite adhesive materials with specific chemical compositions. The first adhesive layer contains polymers such as polyethylene, polypropylene, or their copolymers in controlled amounts (0-40%, preferably 5-30%). The second adhesive layer uses different polymer compositions. This composite structure ensures both sterility maintenance through reliable sealing and prevention of premature delamination through optimized adhesive chemistry and interlayer bonding.
3Manufacturing precision
If multiple layers of adhesive are applied via printing press, then the seal becomes more robust and uniform, but the process complexity increases
Solution Approach 1:
The adhesive layers are applied in a predetermined sequence using a printing press system configured for multi-layer application. The first adhesive layer is applied to the first substrate, followed by the intermediate layer, and then the second adhesive layer on the second substrate. This preliminary arrangement of adhesive layers before final sealing ensures uniform coating and robust seals while managing process complexity through systematic layer application.
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 a reliable, airtight seal that maintains sterility, reduces the risk of adhesive transfer to medical devices, and accelerates sterilization by enhancing gas permeability through the packaging material, while allowing for easier opening and access to the contents without compromising the seal's integrity.
Implementation Method 1
A design control water based adhesive composition for application using a printing press... provides a reliable, airtight seal that maintains sterility
Implementation Method 2
applied in multiple layers via a printing press, ensuring a robust and uniform seal on substrates
Implementation Method 3
accelerates sterilization by enhancing gas permeability through the packaging material
Data Source
AI summary
The present invention includes compositions of matter, methods of making and using a sealable container using a design control water based adhesive composition for application using a printing press by providing a substrate comprising a first side and a second side each having a top edge, a bottom edge, a right edge, a left edge and a storage region positioned there between; applying a first composition to the top edge, the bottom edge, the right edge, the left edge; applying at least a second composition to the first composition; and placing a cover on the at least a second composition to be sealed by the second composition and the first composition.