N95和KN95的口罩有什么区别?

N95口罩和KN95口罩有区别吗?

这个简单易懂的图表解释了N95KN95口罩之间的区别。N95口罩是美国口罩标准;KN95是中国口罩标准。虽然两种口罩之间有很多不同之处,但这两种口罩在大多数人关心的功能上是一样的。

N95和KN95口罩的区别

口罩制造商3M说,有理由认为中国的KN95“相当于美国的N95。欧洲(FFP2)、澳大利亚(P2)、韩国(KMOEL)和日本(DS)的口罩标准也非常相似。

口罩标准

N95和KN95的共同之处

两种口罩都能捕捉95%的颗粒。在这个指标上,N95KN95口罩是相同的。

N95和KN95口罩都能过滤95%颗粒

因为一些测试标准说N95KN95口罩能够过滤95%0.3微米和以上的颗粒,很多人会说它们只能过滤95%0.3微米以上颗粒。他们以为口罩不能过滤小于0.3微米的微粒。举个例子,这是《南华早报》  的一张图。他们甚至说“N95口罩可以防止佩戴者吸入直径大于0.3微米的颗粒物

N95口罩可以过滤小于0.3微米的颗粒

但是,其实口罩比许多人以为的还能捕捉更小的颗粒。根据经验数据可以看到,实际上口罩在过滤更小的颗粒方面是非常有效的

N95和KN95口罩的区别

这两种标准都要求口罩在捕捉盐颗粒(NaCl)时进行过滤效果检测,都以每分钟85升的速度进行测试。但是,N95KN95之间有一些区别,在这里强调一下。

N95和KN95口罩的区别

这些差异都不大,对于一般使用口罩的人来说没有太大的区别。但是,这里有一些比较关键的差异:

1.如果制造商要拿到KN95的标准,需要对真人进行口罩密封测试,而且漏率(从口罩侧面漏过去的颗粒百分比)需要≤8%N95标准的口罩不要求密封测试。(记住:这是国家对商品的要求。很多工业公司和医院会自己要求员工做密封测试。)

Smart Air做口罩密封测试

2.N95口罩对吸气时的压降要求比较高。这代表着它们需要更透气一点。

3.N95口罩对呼气时的压降也有稍微严格的要求,这应该有助于提高口罩的透气性。

Bottom Line
划重点:N95和KN95口罩的区别

虽然只有KN95口罩需要通过密封测试,但N95口罩和KN95口罩都能够过滤95%的颗粒。另外,N95口罩对透气性有比较严格的要求。

Smart Air

Smart Air为印度儿童测试口罩密封性

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Jason
2024-01-11 10:41 am

Hey I also read a similar article from there:https://www.zxmedppe.com/whats-the-difference-between-n95-and-kn95-masks/ Is this article authoritative?

Planet Halo Health
2023-06-10 4:03 am

It is important to note that both N95 and KN95 masks should be worn properly in order to be effective. The mask should fit snugly against the face, and there should be no gaps around the edges. The mask should also be replaced every 8 hours or sooner if it becomes dirty or wet.

Planet Halo Health
2023-04-01 2:28 am

The main difference is that N95 masks are certified by the National Institute for Occupational Safety and Health (NIOSH) in the United States, while KN95 masks are certified by the Chinese government. Both certifications require the masks to meet similar standards for filtration efficiency, but there may be slight differences in the testing methods and requirements.

Jan Peterson
2022-04-27 12:22 pm

I love that your testing facility looks like it is set up in your college dorm room. Kudos, though, as you appear to be careful about it.

Kim
2022-03-12 5:33 am

KN95 is imported from China. N95 is made in USA

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