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D3578-19 – Standard Test Method Technical Guide
📐 Standard Scope and Classification
ASTM D3578-19 (Reapproved 2023) establishes critical performance requirements for natural rubber gloves used in medical examination, diagnostic, and therapeutic procedures, as well as the handling of contaminated medical materials. This standard accommodates gloves fitting either hand, paired gloves, and various sizes, setting specifications for both packaged sterile and nonsterile formats.
The standard classifies gloves into two distinct categories based on physical properties. Type I gloves require a minimum tensile strength of 18 MPa and a maximum stress at 500% elongation of 5.5 MPa. Type II gloves are designed for greater flexibility, with a minimum tensile strength of 14 MPa and a maximum stress at 500% elongation of 2.8 MPa.
⚙️ Materials, Manufacture, and Sampling
Manufacturers may use any natural rubber compound, provided the finished glove meets all specified performance requirements. A critical material restriction is the explicit prohibition of talc on both the interior and exterior surfaces. Any lubricant applied must conform to the U.S. Pharmacopeia (USP) standard for Absorbable Dusting Powder, or its safety and efficacy must be rigorously established prior to use.
For referee and compliance testing, gloves must be sampled in strict accordance with ISO 2859 (Sampling Procedures for Inspection by Attributes). The required inspection levels and Acceptable Quality Levels (AQL) are detailed in Table 1 of the standard, unless a more comprehensive agreement exists between the purchaser and seller.
📊 Performance Requirements and Test Methods
Beyond tensile and elongation demands, the standard mandates strict adherence to several ASTM test methods to ensure comprehensive quality. Dimensional conformance is verified through ASTM D3767. Barrier integrity (freedom from holes) is assessed using ASTM D5151. Accelerated aging properties are evaluated by ASTM D573, while extractable proteins are analyzed via ASTM D5712 to monitor allergen levels. Residual powder is quantified using ASTM D6124.
| 🟦 Parameter | 📐 Type I | 🎯 Type II |
|---|---|---|
| Minimum Tensile Strength | 18 MPa | 14 MPa |
| Max. Stress at 500% Elongation | 5.5 MPa | 2.8 MPa |
⚠️ Strict Prohibition of Talc: ASTM D3578-19 mandates that the inside and outside surfaces of the gloves must be completely free of talc. This is a critical safety requirement for compliance with the specification.
💡 Lubricant Compliance Note: If a lubricant other than USP Absorbable Dusting Powder is employed, its safety and efficacy for the intended medical application must be established through robust documented evidence before the product is marketed.
❓ Frequently Asked Questions
🔍 What is the scope of ASTM D3578-19?
This specification covers the performance and safety requirements for natural rubber gloves intended for medical examinations, diagnostic and therapeutic procedures, and the handling of potentially contaminated medical materials.
💡 What distinguishes Type I from Type II gloves?
Type I gloves are formulated for higher strength and stiffness, requiring a minimum tensile strength of 18 MPa. Type II gloves offer greater flexibility, with a lower minimum tensile strength of 14 MPa and a lower maximum stress at 500% elongation.