AATCC M14返回 Back
AATCC M14
美标, 一般用途织物面罩，社区口罩检测
其为美国和加拿大市场上首个此类文件，以协助纺织行业遵循美国疾病控制与预防中心（CDC）针对COVID-19流行期间提出的建议，以及美国和加拿大的其他相关法规开发和制造成人织物面罩。
周期: 30-40个工作日
样品数量80pcs + 8m耳带+2m鼻梁筋
测试内容：
* 合体性和尺寸
* 材料和构造
* 颗粒物过滤效率
* 呼吸阻力
* 洗涤护理和使用寿命
* 头带和耳带
* 产品标签和标记
技术参数:
Perform one of the following test methods on the material assembly. It is not necessary to evaluate the air permeability of individual layers in a multi-layer assembly.
2. ASTM D737 using a standard 125 Pa pressure drop. Use the standard 38.3 cm2 test area.
3. ISO 9237 using a standard 100Pa pressure differential
The following air permeability values are recommended for face coverings:
For EN 14683 (Annex C), a maximum of 36.7 Pa/cm2.
For ASTM D737, a minimum of 37.5 ft3/min/ft2 (1.14 L/min/cm2).
For ISO 9237, a minimum of 0.91 l/min/cm2 (or 15 cm/s).
Test additional specimens after multiple laundering cycles (see Laundering and Care Considerations). Do not retest the same specimens.
Air permeability is measured on the fabric only. While this test indicates the potential for the fabric to be effectively used in a face covering, construction, printing, and other processes may also impact the breathing resistance of the finished face covering.
