天然橡胶板,以其高弹性而闻名,抗撕裂性,耐磨性,和减震,广泛应用于机械密封等领域,设备垫片,车间地板,以及水利工程防腐衬里。确保产品质量，避免采购损失,遵守当前的执行标准至关重要。目前,中国工业级天然橡胶板的主要国家标准是GB/T 5574-2008″工业橡胶板,”作为生产的法律依据,测试,投标,和接受.
国标/T 5574-2008 2008年10月1日起实施，代替旧版GB/T 5574-1994。由国家市场监督管理总局和国家标准化管理委员会联合发布。京东橡胶股份有限公司是本标准起草单位之一。本标准明确适用于以天然橡胶为主要原料经硫化生产的各种纯橡胶和织物增强天然橡胶板。,with rectangular rubber strips also regulated under this standard.The new standard optimizes thickness tolerances,hardness grading,and product labeling rules,introduces a new ultra-high hardness grade(90一个),and refines additional performance indicators such as aging resistance and chemical resistance.This unifies production and inspection criteria across the industry,providing a standardized and authoritative reference for manufacturing,测试,and acceptance within China’s natural rubber sheet sector.
从产品分类来看,国家标准根据耐油性能将天然橡胶板分为三类:A型—通用天然橡胶板(不耐油;市场上主流的黑色橡胶板);B型——中度耐油板材,exhibiting a volume change of+40%to+90%after 72 100℃3号标准油浸泡时间;C型——耐油改性天然橡胶板,体积变化控制在-5%至+40%之间。买家可根据具体使用条件选择合适的型号。关于尺寸参数,该标准规定了常规厚度范围为 0.5 毫米至 50 毫米,厚度公差因规格而异——例如,±0.3 毫米，厚度可达 3 mm 和 ±2.0 mm（厚度超过） 20 mm.宽度标准化为 500 毫米和 2000 毫米,公差±20毫米。非标准长度和宽度由供需双方合同约定.
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对于物理和化学性能,适用多项配套国家标准:拉伸性能按GB/T 528，撕裂强度按GB/T 529，邵氏A硬度按GB/T 531测定，热老化、耐酸碱性液体按GB/T 3512 分别为GB/T 1690。该标准将拉伸强度分为七个等级(3 MPA到 17 兆帕)断裂伸长率分为九级(100%到 600%).高品质处女 天然橡胶板 通常达到上述优势 15 MPa and an elongation of 500%,offering superior rebound performance compared to recycled rubber sheets.Thermal aging tests are conducted under two conditions—70°C/72h and 100°C/72h—with post-aging reductions in strength and elongation strictly limited within the ranges defined by the standard.
Beyond general industrial rubber sheet standards,specialized specifications exist for special-purpose natural rubber sheets:insulating natural rubber sheets must meet relevant power industry insulation pad regulations;anti-static natural rubber sheets conform to national standards for anti-static materials;products exported to the EU must additionally comply with REACH environmental regulations and ISO 37 international rubber testing standards,ensuring dual compliance with both domestic and international requirements.Surface quality is also strictly specified—qualified sheets must be free from cracks,气泡,洞,or raised impurities,though minor processing marks are acceptable.Large-scale depressions or damage result in rejection.
For manufacturers and buyers alike,adherence to national standards is key to quality control.As a drafting organization,Jingdong Rubber has been deeply involved in the development and revision of these standards,possessing in-depth knowledge of all core technical requirements.Before shipment,manufacturers conduct batch-by-batch sampling tests for hardness,抗拉强度,and dimensions in accordance with GB/T5574-2008.Buyers can verify these parameters upon receipt,effectively preventing the purchase of substandard or adulterated recycled rubber products,thereby reducing issues such as equipment sealing leakage and gasket cracking requiring rework.
总之,GB/T5574-2008 serves as the core standard for natural rubber sheets,distinguishing between general-purpose and specialized applications through detailed specifications.It is a crucial reference for product selection,制造业,and acceptance.When purchasing natural rubber sheets,优先检查产品是否符合国家标准，从源头上保证工程和设备应用的稳定性和可靠性.
Jingdong Rubber Co., 有限公司. 是专业人士 橡胶板制造商, 生产硅橡胶板, 天然橡胶板, 氟橡胶板, 氯丁橡胶板, 绝缘橡胶板,三元乙丙橡胶板, 耐油橡胶板, 防静电橡胶板, 阻燃橡胶板, 导电橡胶板, 防滑橡胶板, 和牛棚垫, ETC. 与超过 40 多年行业经验, 畅销国内外. 如果您需要我们的任何产品,请发送电子邮件至 sales@jingdongrubber.com.