Shanghai Daoqin Plastics Co., Ltd.

口罩, in already formed is 人手必备 material product. new type 冠状病毒感染病例 不断 increase, large for 戴口罩 意识也 large degree “ improve/increase ”.

国 inner large 便利店, and other 零售渠道 口罩 product by 抢购一空, 淘宝, 京东, more more and other more electrical 商平台 in, 包括3M Brand 旗舰店 inner separation KN95 series 口罩, featuring anti 霾, anti powder 尘, anti series 口罩, large more in “缺货”, “无货”, “ lower 架”状态, full 民抢购口罩进入紧张状态.

currently medical grade main/primary separation is 3 types: anti grade most high medical grade anti 护口罩, 手术室 and other has as ring commonly used medical grade outer 科口罩 and grade one-time property use medical grade 口罩.

that 么口罩 is what can retardant 挡病毒 传播呢? it also is what 样 材质呢?

我们 usually 说口罩 is 无纺布材 material, 无纺布 is versus for textile 布 说, is non textile 布, is toward or machine fiber formed.

specific to upper, its raw materials full is polypropylene (PP) （Polypropylene, 简称PP）, medical use generally is more structure, generally is SMS structure, 示意图见图一 and 图二.

     from use material upper 看, polypropylene (PP) high MFI 无纺布 specialized material formed is most selection, production melt quality flow speed rate in 33-41g/min polypropylene (PP) product, to polypropylene (PP) 无纺布 standards.

from fiber application areas 看, polypropylene (PP) fiber specialized material product used for non 织造布, clothing/apparel material, carpet filament, medical grade use product, use use product and other field/area.

in medical 卫生方面, polypropylene (PP) 无纺布 specialized material production 无纺布 can used for one-time property 手术衣, by mono, 口罩, cover/cap 布, liquid absorption and other, 无纺布口罩 is 由专业 used for medical fiber 无纺布 inner 两层, in increase 一层 滤 anti 菌达99.999% above solvent 喷布经 ultra- 声波 welding formed ,无纺布口罩 鼻梁处 using/adopting environmental protection type full strip/profile ,不含任何 metal, belt/tape gas, 舒适.

国 inner 疫情逐渐 expand large, 各 口罩供不应求, enterprise fast speed production plan, ensure full force 保供.

据 understanding, currently inner high MFI fiber production enterprise 共31家, 2019 year full year high fiber output/production volume in 88 10,000 tons left right.

1 month lower 旬疫情骤起, 1 month 21 day can rate 先公布 full force high MFI fiber Y381H used for medical production, Shanghai full force 以赴, make 命保障医护 use product raw materials, cationic 石化指出 if 2 month fiber material has demand, will enterprise optimization production, raw materials supply.

in 石化华北因济南炼化 full month fiber material, currently add large 排产, large has machine di in high MFI fiber, positive 源继续 focus/key point 推广Y40L fiber material, 独山子石化随时待命 will adjustment production plan, ensure lower factory demand, China is full 国保供 excellent 质卫生材 material, in 疫情面 front, full force 以赴.

key/critical 时刻, make 命担当, large enterprise positive full force high fiber issues, will stability product quality, according to market demand 情况, increase output/production volume meet/satisfy market demand.

lower production enterprise 3M China, factory as 人员指出, currently factory has 存货, positive add add production product, full force for resistant this 一场没 has 硝烟 战争.

has data 显示, 1吨 high MFI fiber material can production large 约25万 病菌 anti 护口罩, 1吨 transparent material can production 约50万 medical grade one-time property injection device, 疫情面 front polypropylene (PP) production positive in action.

currently, new type 冠状病毒 positive 处于爆发期, also positive value year time, full medical grade basic 断货. again 者, is achieve resistant 病毒效果, can one-time property use, use cost 昂贵. this 里告诉 large what is anti medical grade 口罩.

一, medical grade antimicrobial principle introduction

can to anti function main/primary has medical grade outer 科口罩 and N95口罩. 国家YY 0469-2004《 medical grade outer 科口罩 technology requirements 》 standards 规定, medical grade outer 科口罩 must to important technology indicators 包括 滤 efficiency, fine 菌 滤 efficiency and retardant force:

efficiency: in gas amount （30±2）L/min conditions lower, for gas force in value 直径（0.24±0.06）μm chlorine gas solvent 胶 滤 efficiency low 于30%;

fine 菌 滤 efficiency: in conditions lower, for pellets is （3±0.3）μm color 葡萄球菌 gas solvent 胶 滤 efficiency low 于95%;

呼吸 retardant force: in efficiency amount conditions lower, gas retardant force ultra- 49Pa, gas retardant force ultra- 29.4Pa.

this its in ensure fine 菌 滤效果 standards is strip/profile, color 葡萄球菌 fine gas solvent 胶 滤 efficiency low 于95%, this is N95 concept 由. therefore N95口罩 although is medical grade 口罩, is meet/satisfy efficiency meet/satisfy 95% standards, can more good combined 人体面部, therefore can to very good 病毒预 anti function.

而 to this types belt/tape 病毒 滤 function main/primary material is fine belt/tape electrical inner 层 滤布——熔喷无纺布.

熔喷无纺布 main/primary is polypropylene (PP), is types ultra- fine electrical fiber 布, can powder 尘. has 肺炎病毒 飞沫靠近熔喷无纺布 rear, by electrical in 无纺布 surface, method 透.

this is this type of material 隔绝病菌 principle. powder by ultra- fine electrical fiber 捕捉住 rear, easy 因清洗而脱离, water 洗亦会 by bad electrical can force. therefore this type of can one-time property use. combined 平面口罩熔喷 滤 grade has: grade, BFE95（滤效95%）, BFE99（滤效99%）, VFE95（滤效99%）, PFE95（滤效99%）, KN90（滤效90%）.

二, medical grade outer 科口罩

medical grade outer 科口罩 generally is 由三层无纺布 made formed. material is viscous 无纺布+熔喷无纺布+纺 viscous 无纺布. can 一层改 use short improvement 皮肤触感, 即ES hot 轧无纺布+熔喷无纺布+纺 viscous 无纺布. outer tool has anti design, in 层 滤, inner wet. 熔喷布 generally selection 20克 heavy.

而N95杯 type 口罩则由针刺棉, 熔喷布, and 无纺布组 formed, its 熔喷布 usually using/adopting 40克 heavy more high, again add upper 针刺棉 thick degree, therefore appearance upper ratio 平面口罩 more thick 一, its anti 护效果至 less can to 95%.

几层口罩, in 口罩 国家 standards GB/T 32610 in has 规定, if is medical use 口罩, less is 3层, 即我们说 SMS（2层S层 and 1层M层）, currently inner most high is 5层, 即SMMMS（2层S层 and 3层M层）, 做口罩并不 difficult, comparison difficult is 做SMMMS布, Imported 无纺布 equipment price is upper 100 million yuan, 笔者见 most 贵 一台 medical 无纺布 equipment is 5 100 million 人民币.

this 里面 S table/sheet viscous 层（Spunbond）, its fiber comparison coarse, in 20 micron （μm） left right, 2层S纺 viscous main/primary function is 支撑整 无纺布 structure, for retardant 隔并没 has large function.

口罩里面 most important is retardant or 则熔喷层M（Meltblown）, 熔喷层 fiber comparison fine, in 2 micron （μm） left right, therefore has viscous 层直径 十 separation 之一, this for anti fine 菌, liquid its important function.

if S纺 viscous more, 口罩就 comparison hard, 而熔喷层M more, 则呼吸 comparison difficult, therefore from 口罩呼吸 difficult easy degree can 判断口罩 隔绝效果, 呼吸越困 difficult, retardant 隔效果 more good, is, if M层变 is film, basic upper can 呼吸, is retardant 隔, fast 不行, therefore, this is technology issues.

is more can issues, will viscous 层S fiber, 熔喷层M fiber and 头发做一 comparison lower ,头发直径 1/3, 接近纺 viscous fiber, 而头发直径 1/30, and 熔喷层M fiber 直径接近, 当然, R&D also in development more fine fiber, ensure more good antimicrobial retardant property.

front to, M层越 fine, can retardant fine and other micro small pellets 进入, ratio 如N95, is in positive 常情况 lower, can retardant 挡95% micro small pellets （0.3 micron ）, according to medical grade anti 护口罩国家 standards GB/T 19083 requirements, in gas amount is 85L/min情况 lower, for non property pellets efficiency combined lower table/sheet requirements:

table/sheet 1: medical grade anti 护口罩 滤 and other grade

from upper understanding 释 说, N95实际 upper is use polypropylene (PP) 无纺布SMMMS made as formed can 滤95% micro fine pellets 5层口罩.

most rear from material degree separation for S纺 viscous and M熔喷层都 has which requirements:

M层: 熔喷层

材 material requirements: high flow property.

recommendation material: Domestic material 如山东道恩 degradation method polypropylene (PP): Z-1400, Z1500, Imported LyondellBasell company metallocene polypropylene (PP) HP461Y, MF650Y.

S层: viscous 层

材 material requirements: high strength

recommendation material: melt in 25~60 polypropylene (PP), ratio ExxonMobil Exxon-Mobile and Shanghai 赛科 2040都 is very good viscous material, 如S2040 property can indicators lower: