shit,查埋3744都係class 1,應該都係P1 80%https://www.aunsafety.com/wp-content/uploads/2018/09/2017-Worker-Safety-Mini-Catalogue.pdf3311k係咪p100我好質疑yes u right
不過n94以上就肯定既
如果戴呢個都中招 咁普通surgical mask都88
答完之後我唔放心再搵多啲料,但單罐好少料,官方直情冇準確數據
首先完全唔知3311入面濾棉係乜,唯有靠下圖斷估係7711級數
而7711亦都搵唔到官方過濾率,反而啲售賣網寫佢係P2級,即係N95級,過濾率95%
所以你講3311係N94係啱
另外3744棉都係94%
誤導咗各位唔好意思,我都係自己搵咗大輪先清楚
呢個catalog 話3311k 只有P1 = N80
https://www.3mcompany.jp/3M/ja_JP/company-jp/all-3m-products/~/3M-防じん機能を有する有機ガス用吸収缶-3311J-55-S1/?N=5002385+3292636738&rt=rud
3311j 都係 80%
https://www.3mphilippines.com.ph/3M/en_PH/company-ph/all-3m-products/~/3M-Particulate-Filter-3744-100-EA-Case/?N=5002385+8711017+3293805815&rt=rud
即係單咀全線只係防到80%
係咪可以收返埋