標準編號:	GB/T 45331-2025
中文名稱:	質子交換膜增強用聚四氟乙烯膜
英文名稱:	ePTFE membrane for reinforcement of proton exchange membrane
行業分類:	GB    國家標準
發布機構:	國家市場監督管理總局 國家標準化管理委員會
發布日期:	2025-02-28
實施日期:	2025-9-1
標準狀態:	valid
翻譯語言:	英文
文件格式:	PDF
中文字符數:	18000 字
翻譯價格(元):	1260.0
交付時間:	付款后 1~3 個工作日

GB/T 45331-2025 ePTFE membrane for reinforcement of proton exchange membrane 1 Scope This standard specifies technical requirements, test methods, inspection rules as well as marking, packaging, transportation and storage of ePTFE membrane for reinforcement of proton exchange membrane (hereinafter referred as “ePTFE membrane”). This document is applicable to the scientific research, production, use and management of ePTFE membrane for reinforcement of proton exchange membrane, and as for other categories of ion exchange membrane reinforcement materials, it serves as a reference. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 191 Packaging - Pictorial marking for handling of goods GB/T 20042.3-2022 Proton exchange membrane fuel cell - Part 3: Test method for proton exchange membrane GB/T 32361-2015 Test methods for pore size properties of separation membrane - Bubble point and mean flow pore test 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 ePTFE membrane for reinforcement of proton exchange membrane membrane produced by biaxial stretching process with polytetrafluoroethylene resin as raw material, which can be compounded with proton conductive polymer and enhance mechanical strength 3.2 porosity percentage of membrane pore volume to the total membrane volume [Source: GB/T 20103-2006, 2.1.32] 3.3 most probable pore size pore size corresponding to where the percentage of occurrence is maximum on pore size distribution curve [Source: 3.2 of GB/T 5002-2016] 3.4 mass per unit area mass per unit area of membrane in its natural state Note 1: It includes membrane entities and their open pores and closed pores. Note 2: It is consistent with the concept of gram weight, g/m2. 3.5 volume density mass per unit volume of membrane in its natural state Note 1: It includes membrane entities and their open pores and closed pores. Note 2: The unit is gram per cubic centimeter (g/cm2). 4 Technical requirements 4.1 Appearance The surface of ePTFE membrane shall be flat, uniform in color, and free from defects such as cracks, indentations, scratches, impurities and pinholes visible to the naked eye. 4.2 Physical properties The physical properties of ePTFE membrane shall be as specified in Table 1.

Contents Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Technical requirements 5 Test methods 6 Inspection rules 7 Marking, packaging, transportation and storage Bibliography

質子交換膜增強用聚四氟乙烯膜 1 范圍 本文件規定了質子交換膜增強用聚四氟乙烯膜(以下簡稱“聚四氟乙烯膜")的技術要求、試驗方法、檢驗規則以及標志、包裝、運輸和貯存。 本文件適用于質子交換膜增強用聚四氟乙烯膜的科研、生產、使用和管理，其他類型的離子膜增強材料參照執行。 2 規范性引用文件. 下列文件中的內容通過文中的規范性引用而構成本文件必不可少的條款。其中,注日期的引用文件,僅該日期對應的版本適用于本文件;不注日期的引用文件,其最新版本(包括所有的修改單)適用于本文件。 GB/T 191 包裝 儲運圖示標志 GB/T 20042.3-2022 質子交換膜燃料電池 第3部分：質子交換膜測試方法 GB/T 32361-2015 分離膜孔徑測試方法 泡點和平均流量法 3 術語和定義 下列術語和定義適用于本文件。 3.1 質子交換膜增強用聚四氟乙烯膜ePTFE membrane for reinforcement of proton exchange membrane 以聚四氟乙烯樹脂為原料,經雙向拉伸工藝生產的、能與質子導電聚合物復合并起到增強機械強度作用的薄膜。 3.2 孔隙率porosity 膜孔體積與整個膜體積的百分比。 [來源:GB/T 20103-2006，2.1.32] 3.3 最可幾孔徑most probable pore size 孔徑分布曲線上對應于出現百分率最大處的孔徑。 [來源：QB/T 5002-2016，3.2] 3.4 單位面積質量mass per unit area 薄膜在自然狀態下單位面積的質量。 注1:包括薄膜實體及其開口孔隙、閉口孔隙。 注2:與克重的概念一致，單位為克每平方米(g/m2)。 3.5 表觀密度volume density 薄膜在自然狀態下單位體積的質量。 注1：包括薄膜實體及其開口孔隙、閉口孔隙。 注2：單位為克每立方厘米(g/cm2)。 4 技術要求 4.1 外觀 聚四氟乙烯膜表面應平整、色澤均勻,應無肉眼可見的裂紋、壓痕、劃痕、雜質和針孔等缺陷。 4.2 物理性能 聚四氟乙烯膜的物理性能指標應符合表1的規定。