Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM F1927-14
• Năm ban hành / Publication date: 2014
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Standard Test Method for Determination of Oxygen Gas Transmission Rate, Permeability and Permeance at Controlled Relative Humidity Through Barrier Materials Using a Coulometric Detector
• Chỉ số phân loại Quốc tế (ICS) / By field: 83.140.01 - Cao su và sản phẩm chất dẻo nói chung
• Số trang / Page: 6

Phạm vi áp dụng / Scope of standard

1.1 This test method covers a procedure for determination of the rate of transmission of oxygen gas, at steady-state, at a given temperature and %RH level, through film, sheeting, laminates, co-extrusions, or plastic-coated papers or fabrics. This test method extends the common practice dealing with zero humidity or, at best, an assumed humidity. Humidity plays an important role in the oxygen gas transmission rate (O₂GTR) of many materials. This test method provides for the determination of oxygen gas transmission rate (O₂GTR), the permeance of the film to oxygen gas (PO ₂), the permeation coefficient of the film to its thickness (P"O₂), and oxygen permeability coefficient (PʹO₂) in the case of homogeneous materials at given temperature and %RH level(s).

1.2 The values stated in SI units are to be regarded as the standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 9.