Is shelf aging accelerated by repeated opening of the storage package?
Last reviewed: .
Is shelf aging accelerated by repeated opening of the storage package?
C-POLAR publishes no result for a storage package opened again and again; the storage condition the Validation page lists is after 2 years of storage.
The conditions tested, listed on the Validation page, are heavy dust loaded, fast air flow, used filter for 1 year, after 60 washes, after 2 years of storage, and after 60C for 64 days. Two numbered reports the company can cite cover ageing. Hong Kong Metropolitan University, Test Report IRITS202112110001, 11 December 2021, tested a spunlace nonwoven against Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa with reference to BS EN ISO 20743:2013 (transfer method), after accelerated ageing to ASTM F1980-16 for 64 days at 60 °C, and reported: “No significant deterioration of antimicrobial activity was observed after accelerated aging”. It is a contact test on fabric, not an air-filter or airborne result. The Open University of Hong Kong, Test Report IRITS2020007030001R1, 7 June 2021, measured bacterial filtration efficiency on a spunlace nonwoven by a method modified from ASTM F2101:2019, after accelerated ageing to ASTM F1980-16 equivalent to five years at room temperature; bacterial filtration efficiency is a measure of capture, not of destruction. The Terms of Use state: “A reported result describes only what the identified test found.” A result covers the article, the conditions and the endpoint the report names, and nothing beyond them.
A cycle, a combination or an exposure that a named test did not run is not covered by it. The Terms of Use also state: “A test of C-POLAR material, a component, or a prototype does not establish the performance of a finished product that incorporates it. Construction, processing, storage, wear, cleaning, other components, and actual use may change the result.”
Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Hong Kong Metropolitan University, Test Report IRITS202112110001, 11 December 2021; The Open University of Hong Kong, Test Report IRITS2020007030001R1, 7 June 2021. A copy may be made available on our review of the request.
Reviewed on .
Sources
- C-POLAR — Validation
- C-POLAR — Terms of Use, section 3
- The Open University of Hong Kong, Test Report IRITS2020007030001R1, 7 June 2021
- Hong Kong Metropolitan University, Test Report IRITS202112110001, 11 December 2021