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Nitrile glove composition and performance-Substandard properties and inaccurate packaging information
Ashley Herkins1, Sriloy Dey2, Dan Conroy3
1Department of Food, Agricultural, and Biological Engineering, The Ohio State University, Columbus, Ohio, United States of America.
Plos One
|October 31, 2024
Summary
Nitrile glove quality varies by brand. This study analyzed glove composition, durability, and mechanical properties, finding significant differences in performance and adherence to ASTM standards, with some brands failing critical safety requirements.
Area of Science:
- Materials Science
- Polymer Chemistry
- Medical Device Analysis
Background:
- Synthetic medical gloves, particularly nitrile, exhibit variable durability and mechanical properties.
- Manufacturer-specific variations can impact glove performance and safety.
- Adherence to established standards like ASTM International is crucial for medical-grade gloves.
Purpose of the Study:
- To determine the chemical composition of various nitrile glove brands.
- To correlate chemical composition with mechanical properties, durability, and ASTM standard compliance.
- To identify brands that meet or fail critical performance benchmarks.
Main Methods:
- Fourier-transform infrared spectroscopy (FTIR) for chemical composition analysis.
- Solid-state Nuclear Magnetic Resonance (NMR) spectroscopy for detailed material identification.
- Glove Air Diffusion (GAD) testing for durability assessment.
- Instron mechanical testing for tensile strength and elongation analysis.
- Comparison against ASTM International standards for examination gloves.
Main Results:
- American Nitrile Slate gloves showed superior durability and correct acrylonitrile butadiene rubber composition.
- U.S. Medical brand gloves, also pure nitrile, demonstrated excellent tensile strength with over 800% elongation.
- Restore Touch gloves, though nitrile, had poor tensile strength and durability due to minimal thickness.
- Vglove gloves exhibited the worst mechanical properties, failed ASTM standards, and contained polyvinyl chloride (PVC) instead of nitrile.
Conclusions:
- Significant variations exist in the quality and composition of nitrile examination gloves.
- Some brands fail to meet essential ASTM standards for mechanical properties and durability.
- Medical gloves not meeting minimum performance requirements pose risks and should not be used.
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