Radiation Decontamination of Medical Packaging via Variable Energy Zones
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Solution Overview
Problem
Current radiation decontamination methods using electron beams can alter medical items and generate ozone, posing risks to active products and rubber components within packaging, and are not suitable for all product shapes, as they fail to efficiently decontaminate the peripheral outline without affecting the internal contents.
Innovation Solution
A process involving a product with one side opaque and one side partially transparent to radiation, using variable radiation generators to emit different radiation levels to the peripheral outline and central area, respectively, ensuring efficient decontamination while preserving the integrity of medical items, regardless of product shape, by employing radiation screens and generators that adjust radiation intensity and duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a high radiation level electron beam is used to decontaminate the peripheral outline of packaging, then decontamination efficiency is improved, but the medical items inside the packaging are altered or damaged
Solution Approach 1:
The patent applies different radiation levels to different parts of the packaging: a first (higher) radiation level is applied to the peripheral outline for effective decontamination, while a second (lower) radiation level is applied to the central area to protect the medical items inside. This local differentiation of radiation intensity resolves the contradiction between decontamination efficiency and item integrity.
Solution Approach 2:
The packaging surface is segmented into two distinct zones: a peripheral outline region requiring high radiation for decontamination and a central area requiring low radiation to protect contents. The radiation treatment is segmented accordingly, with separate radiation sources or controlled exposure zones applying appropriate radiation levels to each segment.
2Reliability
If a high radiation level electron beam is used to decontaminate packaging, then decontamination effectiveness is improved, but ozone is generated which adversely affects active products and rubber components
Solution Approach 1:
The patent changes the radiation parameter (energy level) to resolve the contradiction. By using a lower radiation level (second radiation level) for the central area containing sensitive items, the generation of harmful ozone is reduced while maintaining adequate decontamination effectiveness. The parameter adjustment balances decontamination needs with protection of sensitive components.
3Ease of manufacture
If uniform radiation is applied to the entire packaging, then simplified processing is achieved, but the peripheral outline is not efficiently decontaminated
Solution Approach 1:
Instead of uniform radiation, the patent applies local quality differentiation by subjecting the peripheral outline to a first radiation level and the central area to a second radiation level. This localized approach ensures complete decontamination of the peripheral outline while protecting the central area, resolving the contradiction between processing simplicity and decontamination completeness.
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
This method allows for the effective decontamination of packaging peripherals and internal areas without altering the medical items, maintaining their integrity and ensuring the preservation of the product's internal environment, even for diverse product shapes, by controlling radiation exposure levels.
Implementation Method 1
multidirectional radiation by an electron beam developing enough energy that when it has passed through the cover sheet, it delivers a dose of radiation of, for example, 25 kGy
Implementation Method 2
screen capable of reflecting or absorbing substantially all the kinetic energy of the electrons from an electron beam, and therefore of preventing these electrons from passing through the said screen
Data Source
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Figure 3~5
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AI summary
The invention relates to a process for decontamination by radiation of a product (1), characterized in that it comprises at least one exposing step during which at least a first part (6) of said product (1) is exposed to a first radiation level, and at least a second part (5) of said product is exposed to a second radiation level. The invention also relates to an equipment suitable for such a process.