N95和KN95的口罩有什么区别?

N95 vs KN95 Masks Differences

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。

 

总结:N95和KN95口罩的区别

 

总结:虽然只有KN95口罩需要通过密封测试,但N95口罩和KN95口罩都是被认可能够过滤95%的颗粒。另外,N95口罩对透气性有比较强的要求。

 

Smart Air为印度儿童测试口罩密封性

 

 

聪明空气科普雾霾之时

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Mike f

What’s the best cleaning method for KN95 masks?

Good question Mike! We’ve written up on a reliable way of disinfecting respirators like N95 and KN95 in this article.

JillJJ

*PLEASE* put a big red “not true” lettering over the pictures/charts that are false. Instead of randomly mixing true and false images and buried somewhere in the text are small mentions of what’s true/false. Ugh. People on Facebook are sharing the “false” images as “directly found on SmartAirFilters.com”

Great point Jill, we definitely don’t want to see the data being taken out of context. We’ve updated the graphic in this article to state how it is misleading.

Kristīne Klints

For how long time can person wear this respirator kn95?

This is a tough question to answer Kristīne. It really depends whether your mask has been infected with the virus. We suggest you read this article on how long pollution masks really last, as well as our article on the recommended practice for disinfecting masks.

marco diaz

Hi, i have a question. Is there a difference if the respirator uses the elastic loops over the ear or if it is worn over the neck, as the kn95??

Liz - Smart Air

hi Marco, strip designs doesn’t affect the mask efficiency. So you can pick one with the loop that helps to fit the mask on your face the best.

Cathy

I think you have this wrong. I have always had to get a “fit test” with N-95 masks for healthcare usage. Many years and many different companies have required this.

We’ve updated our article to add more clarity on this matter, Cathy. The N95 (NIOSH) standard does not require a fit test, but many hospitals and companies do. We’ve added this to the article.