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- D-2388 What’s the Best Material for a Mask?
Federal health officials have now recommended that we cover our faces with fabric during the coronavirus pandemic. But what material offers the most protection?
The Centers for Disease Control and Prevention has posted a no-sew mask pattern using a bandanna and a coffee filter as well as a video on making masks using rubber bands and folded fabrics found at home.
While a simple face covering can reduce the spread of coronavirus by blocking outgoing germs from coughs or sneezes of an infected person, experts say there is more variation in how much homemade masks might protect the wearer from incoming germs, depending on the fit and quality of the material used.
Scientists around the country have taken it upon themselves to identify everyday materials that do a better job of filtering microscopic particles. In recent tests, HEPA furnace filters scored well, as did vacuum cleaner bags, layers of 600-count pillowcases and fabric similar to flannel pajamas. Stacked coffee filters had medium scores. Scarves and bandanna material had the lowest scores, but still captured a small percentage of particles.
If you don’t have any of the materials that were tested, a simple light test can help you decide whether a fabric is a good candidate for a mask.
“Hold it up to a bright light,” said Dr. Scott Segal, chairman of anesthesiology at Wake Forest Baptist Health who recently studied homemade masks. “If light passes really easily through the fibers and you can almost see the fibers, it’s not a good fabric. If it’s a denser weave of thicker material and light doesn’t pass through it as much, that’s the material you want to use.”
Researchers say it’s important to remember that lab studies are conducted under perfect conditions with no leaks or gaps in the mask, but the test methods give us a way to compare materials. And while the degree of filtration for some homemade masks seems low, most of us — who are staying home and practicing social distancing in public — don’t need the high level of protection required for medical workers. More important, any face covering is better than none, especially if worn by a person who has the virus but doesn’t know it.
The biggest challenge of choosing a homemade mask material is to find a fabric that is dense enough to capture viral particles, but breathable enough that we can actually wear it. Some items being touted online promise high filtration scores, but the material would be unwearable.
Dressing Up for Work … at Home
Yang Wang, an assistant professor of environmental engineering at Missouri University of Science and Technology, worked with his graduate students to study various combinations of layered materials — including both air filters and fabric. “You need something that is efficient for removing particles, but you also need to breathe,” said Dr. Wang, who last fall won an international award for aerosol research.To test everyday materials, scientists are using methods similar to those used to test medical masks, which everybody agrees should be saved for medical workers who are exposed to high doses of virus from seeing infected patients. The best medical mask — called the N95 respirator — filters out at least 95 percent of particles as small as 0.3 microns. By comparison, a typical surgical mask — made using a rectangular piece of pleated fabric with elastic ear loops — has a filtration efficiency ranging from 60 to 80 percent.
Dr. Wang’s group tested two types of air filters. An allergy-reduction HVAC filter worked the best, capturing 89 percent of particles with one layer and 94 percent with two layers. A furnace filter captured 75 percent with two layers, but required six layers to achieve 95 percent. To find a filter similar to those tested, look for a minimum efficiency reporting value (MERV) rating of 12 or higher or a microparticle performance rating of 1900 or higher.
The problem with air filters is that they potentially could shed small fibers that would be risky to inhale. So if you want to use a filter, you need to sandwich the filter between two layers of cotton fabric. Dr. Wang said one of his grad students made his own mask by following the instructions in the C.D.C. video, but adding several layers of filter material inside a bandanna.
Dr. Wang’s group also found that when certain common fabrics were used, two layers offered far less protection than four layers. A 600 thread count pillow case captured just 22 percent of particles when doubled, but four layers captured nearly 60 percent. A thick woolen yarn scarf filtered 21 percent of particles in two layers, and 48.8 percent in four layers. A 100 percent cotton bandanna did the worst, capturing only 18.2 percent when doubled, and just 19.5 percent in four layers.
The group also tested Brew Rite and Natural Brew basket-style coffee filters, which, when stacked in three layers, showed 40 to 50 percent filtration efficiency — but they were less breathable than other options.
If you are lucky enough to know a quilter, ask them to make you a mask. Tests performed at the Wake Forest Institute for Regenerative Medicine in Winston-Salem, N.C., showed good results for homemade masks using quilting fabric. Dr. Segal, of Wake Forest Baptist Health, who led the study, noted that quilters tend to use high-quality, high-thread count cotton. The best homemade masks in his study were as good as surgical masks or slightly better, testing in the range of 70 to 79 percent filtration. Homemade masks that used flimsier fabric tested as low as 1 percent filtration, Dr. Segal said.
The best-performing designs were a mask constructed of two layers of high-quality, heavyweight “quilter’s cotton,” a two-layer mask made with thick batik fabric, and a double-layer mask with an inner layer of flannel and outer layer of cotton.
Bonnie Browning, executive show director for the American Quilter’s Society, said that quilters prefer tightly woven cottons and batik fabrics that stand up over time. Ms. Browning said most sewing machines can handle only two layers of fabric when making a pleated mask, but someone who wanted four layers of protection could wear two masks at a time.
Ms. Browning said she recently reached out to quilters on Facebook and heard from 71 people who have made a combined total of nearly 15,000 masks. “We quilters are very much in the thick of what’s going on with this,” said Ms. Browning, who lives in Paducah, Ky. “One thing most of us have is a stash of fabric.”
People who don’t sew could try a folded origami mask, created by Jiangmei Wu, assistant professor of interior design at Indiana University. Ms. Wu, who is known for her breathtaking folded artwork, said she began designing a folded mask out of a medical and building material called Tyvek, as well as vacuum bags, after her brother in Hong Kong, where mask wearing is common, suggested it. (DuPont, the maker of Tyvek, said in a statement that Tyvek is intended for medical apparel, not masks.) The folded mask pattern is free online, as is a video demonstrating the folding process. In tests at Missouri University and University of Virginia, scientists found that vacuum bags removed between 60 percent and 87 percent of particles. But some brands of vacuum bags may contain fiberglass or are harder to breathe through than other materials, and shouldn’t be used. Ms. Wu used a bag by EnviroCare Technologies, which has said it does not use fiberglass in its paper and synthetic cloth bags.
“I wanted to create an alternative for people who don’t sew,” said Ms. Wu, who said she is talking to various groups to find other materials that will be effective in a folded mask. “Given the shortage of all kinds of materials, even vacuum bags might run out.”
The scientists who conducted the tests used a standard of 0.3 microns because that is the measure used by the National Institute for Occupational Safety and Health for medical masks.
Linsey Marr, a Virginia Tech aerosol scientist and an expert in the transmission of viruses, said the certification method for respirators and HEPA filters focuses on 0.3 microns because particles around that size are the hardest to catch. While it seems counterintuitive, particles smaller than 0.1 microns are actually easier to catch because they have a lot of random motion that makes them bump into the filter fibers, she said.
“Even though coronavirus is around 0.1 microns, it floats around in a wide range of sizes, from around 0.2 to several hundred microns, because people shed the virus in respiratory fluid droplets that also contain lots of salts and proteins and other things,” said Dr. Marr. “Even if the water in the droplets fully evaporates, there’s still a lot of salt and proteins and other gunk that stays behind as solid or gel-like material. I think 0.3 microns is still useful for guidance because the minimum filtration efficiency will be somewhere around this size, and it’s what NIOSH uses.”
Learn More - L-7129 NONWOVEN SMS PRODUCTION LINE, 1600mm, SPUNBONDED, MELT BLOWN
PP CHIPS FOR MELTBLOWN: 1200 TO 2000
FABRIC WIDTH: 1600mm
2 SPINNING BEAMS FOR SPUNBOND & 1 FOR MELTBLOWN
BASIC WEIGHT: SMS 9 TO 80 GRAMS PER SQUARE METER
SS: 15 TO 100 GRAMS PER SQUARE METERPRODUCT:
SMS LAMINATED NONWOVEN FABRIC
SS SPUNBOND NONWOVEN FABRIC SS
M MELTBLOWN NONWOVEN FABRIC MTO MAKE HYGENIC FABRICS SUCH AS BABY DIAPERS, SANITARY NAPKINS, ADULT DIAPERS, MEDICAL OPERATION SUITS, OPERATION CAPS, OPERATIONS SHOES, MASKS, ETC.
CONSISTING OF:
3 X FEEDING SYSTEMS
AUTOMATIC VACUUM SUCTION FOR BOTH MAIN MATERIAL AND ADDITIVES
CAPACITY (SB + MB) 2 X 520 KGS/H, (SB) 2 X 200 KGS/HR
WITH THREE HOPPERS, THREE SUPPLIYING DEVICESSPUNBOND SYSTEM
2 X EXTRUDERS
DIAMETER: 150mm
CAPACITY: 450 KGS/HR
L/D 30:1
DRIVE POWER: 110 KW
HEATING POWER: 90 KW2 X RECYCLING SYSTEMS
DIAMETER: 105mm
CAPACITY: 100 KGS PER HOUR
L/D: 15:12 X MELT FILTERS
WORKING TEMPERATURE: UP TO 280 CELSIUS
FILTRATION CAPACITY: 520 KGS PER HOUR2 X METERING PUMPS
TYPE: GEAR PUMP
FLOW VOLUME: 250 ML/R
DESIGNING TEMPERATURE: 280 CELSIUS2 X MELT PIPELINES
WITH STATIC MIXER2 X MONOMER EXHAUSTER
INCLUDING BLOWER, CHILLER, PIPELINE, VALVE, INSULATION, ETC2 X SPINNING BEAMS
SINGLE COAT-HANGER MELT DISTRIBUTION
DESIGNING PRESSURE: 9MPA
WORKING TEMPERATURE: MAX 280 CELSIUS4 X SPINNERETS
HOLE DIAMETER: 0.45mm
L/D: 5:1
15,500 HOLESMELTBLOWN SYSTEM
1 X EXTRUDER
DIAMETER 120mm
CAPACITY: 280 KGS/HR
L/D: 30:1
DRIVE POWER: 75 KW
HEATING POWER: 80 KW1 X MELT FILTER
FILTRATION PRECISION: 20 TO 60 MICROMETERS
FILTRATION: 280 KGS PER HOUR1 X METERING PUMP
GEAR PUMP
MAX. FLOW VOLUME: 100ML/R
DESIGNED TEMPERATURE: 300 CELSIUS1 X MELT PIPELINE
WITH STATIC MIXER1 X SPINNING BEAM
INCLUDING STRETCHING CHANNEL, NOZZLE, ETC. WITH INSULATION MATERIAL
DESIGNED PRESSURE: 6 MPA2 X SPINNING DIE PACKS
COMPACT DIE PACKS
HOLE DIAMETER: 0.35mm
L/D: 12:1
# OF HOLES: 42HPI1 X SCREW BLOWER
INCLUDING MUFFLE, PRESSURE REDUCER VALVE, PIPELINE, ETC.
POWER: 200 KW1 X HOT AIR SYSTEM
FLOW VOLUME: 6000 CUBIC METERS PER HOUR
WORKING TEMP: MAX 350 CELSIUS
INCLUDING HEATER, STAINLESS STEEL PIPELINE, ETC.
POWER: 290 KW1 X OFF-LINE CONVEYOR
RANGE OF SPEED: 5 TO 100 METERS PER MINUTE1 X CONVEYOR
MECHANICAL SPEED: MAX 400 METERS PER MINUTE
BELT WIDTH AND PENETRATION
3800±10mm, 10000 CUBIC METERS PER H.M21 X CALENDAR
DOUBLE ROLLS HEATED BY OIL
PROCESS SPEED: 350 METERS PER MINUTE
EMBOSSING WIDTH: UP TO 2000mm
MAX LINEAR PRESSURE: 110 DAN/C
MAX. TEMP OF EMBOSSING ROLLER, 180 CELSIUS1 X WINDER
ONLINE CHANGING ROLL, ONLINE EDGE CUTTING, TENSION CONTROL
MAX. LINEAR SPEED: 350 METERS PER MINUTE
WIDTH: 1600mm
WIND DIAMETER: MAX 1500mm1 X SLITTER
MAX. LINE SPEED: 600 METERS PER MINUTE
MAX. WIND DIAMETER: 1200mm
MIN. SLITTING WIDE: 120mm
22 CIRCULAR BLADES1 X STEEL PLATFORM
1 X ELECTRICAL CONTROL SYSTEM
2 X OIL OVEN
1 X AIR CONDITIONING SYSTEM
1 X WATER COOLING SYSTEM
1 X CLEANING EQUIPMENTS FOR DIE PACK
1 X AUXILIARY PLATFORM
1 X AUXILIARY EQUIPMENTS
1 X LABORATORY TESTING DEVICE
Learn More - J-2795 DISPOSABLE FACE MASKS, 3-PLY SPUNBOND-MELTBLOWN-SPUNBOND, 50 PIECES PER BOX
DISPOSABLE FACE MASKS
MATERIAL: 3-PLY (100% VIRGIN FIBER)
1ST LAYER NONWOVEN PP SPUNBOND
2ND LAYER NONWOVEN PP MELTBLOWN
3RD LAYER NONWOVEN PP SPUNBOND
MASK SIZE: 175mm x 95mm (ADULT SIZE)
WEIGHT: 2.9 TO 3.2 GRAMS EACH
50 PIECES PER BOX / 40 BOXES PER CARTON
• LOW BREATHING RESISTANCE
• SOFT LINING, NON-IRRITATING TO SKIN
• FIBERGLASS FREE AND LATEX FREE
• WITH ADJUSTABLE NOSE BRIDGE SUPPORT PIECE
• WITH ELASTIC EAR LOOPSQUANTITY: 50,000 PIECES OF FRESH STOCK CURRENTLY AVAILABLE
Learn More - V-1817 SEMI-AUTOMATIC NOSE CLIP WELDING MACHINE
SEMI-AUTOMATIC NOSE CLIP WELDING MACHINE FOR NOSE CLIP WELDING FOR DUST MASK RESPIRATORS, IT’S EASY TO OPERATE, FIRM WELDING EFFECT. THIS MACHINE INCORPORATES CONSTANT TEMPERATURE WELDING, WHICH IS NOT HARMFUL TO THE FABRIC, IT’S THE IDEAL MACHINE FOR DUST MASK RESPIRATOR MANUFACTURING.
FEATURES:
1. THIS MACHINE IS EASY TO OPERATE; THE GLUED ALUMINUM NOSE CLIP IS MOVED BY PNEUMATIC THEN WELDED ONTO THE MASK.
2. IT’S HIGH PRECISION AND THE NOSE CLIP WELD IS FIRM.
3. WELDING WITH CONSTANT TEMPERATURE WHICH IS NOT HARMFUL TO THE FABRIC.
ITEM NAME
TECHNICAL PARAMTER
QTY
REMARK
SPECIFICATION
1200mm X 650mm X 1000mm
1
HONGDA
WEIGHT
50KG
EFFICIENCY
8 TO 15PCS/MIN
VOLTAGE
220V/380V
AIR PRESSURE
5KG/CM²
FREQUENCY
20KHZ
POWER
600W
MOLD SERVO MOTOR
SGM7G-09AFC61 4.4KW
1
YASKAWA
ULTRASONIC POWER SERVO MOTOR
SGM7G-13AFC61 1.3KW
2
YASKAWA
MATERIAL PULLING SERVO MOTOR
SGM7G-09AFC61 0.85KW
2
YASKAWA
MATERIAL FEEDING/CORRECTING/INDENTATION MOTOR
130BYG-350A
4
SONGYANG
POUCHING MOTOR
110BYG-350B
4
SONGYANG
110 STEPPER MOTOR
110BYG-350A
10
SONGYANG
UP AND LOWER MOTOR
90BYG-350A
2
SONGYANG
STEPPER MOTOR 56
SY57STH56-2004A
8
SONGYANG
DIRECT CURRENT MOTOR
0.4KW
2
DIRECT CURRENT MOTOR
0.6KW
1
ASYNCHRONOUS THREE-PHASE MOTOR
90S-6
1
0.75KW
FREQUENCY CONVERTER
AVF200-0152
1
1.5KW
MAIN PNEUMATIC COMPONENTS: AIRTAC(TAIWAN); MAIN ELECTRICAL COMPONENTS: PANASONIC(JAPAN), SICK(GERMANY), DONLIM(CHINA&JAPAN), ETC.
EMAIL US FOR PRICE & PICTURES
INCLUDE OUR REFERENCE NUMBER
- V-1816 AUTOMATIC RESPIRATOR REPLACEMENT FILTER MAKING MACHINE
AUTOMATIC RESPIRATOR REPLACEMENT FILTER MAKING MACHINE IS ALSO CALLED A PARTICULATE RESPIRATOR FILTER MAKING MACHINE OR HALF FACE RESPIRATOR FILTER MAKING MACHINE, IT’S MADE UNDER MATURE TECHNOLOGY THAT SUPPORTS AUTOMATICALLY MATERIAL FEEDING, WELDING, PUNCHING AND CUTTING, REPLACEMENT FILTER FORMING, THIS MACHINE IS EASY TO OPERATE, BY CHANGING THE ROLLER, IT CAN PRODUCE DIFFERENT SHAPES OF FILTER. THIS MACHINE INCORPORATES ADVANCED ULTRASONIC WELDING AND EQUIPPED WITH CONSTANT TEMPERATURE CONTROLLER WHICH ENSURES THE FILTER FIRMLY AND CLEARLY WELDED.
FEATURES:
1. ADVANCED ULTRASONIC TECHNOLOGY WITH FIRM WELDING EFFECT, IT’S EQUIPPED WITH PULL AND PUSH TYPE MATERIAL FEEDING WHICH MAKES IT EASIER OPERATING.
2. THE MOLD (PATTERN ROLLER) CAN BE CUSTOMIZED TO PRODUCE DIFFERENT FILTERS.
3. THE WELDING LINE IS CLEAR AND FIRM.
ITEM NAME
TECHNICAL PARAMETERS
QTY
REMARK
SPECIFICATION
1800mm X 1200mm X 1800mm
1
HONGDA
WEIGHT
500KG
EFFICIENCY
20 TO 30PCS/MIN
VOLTAGE
220V/380V
AIR PRESSURE
3-6KG/CM²
FREQUENCY
15/20KHZ
POWER
4200W
MOLD SERVO MOTOR
SGM7G-09AFC61 4.4KW
1
YASKAWA
ULTRASONIC POWER SERVO MOTOR
SGM7G-13AFC61 1.3KW
2
YASKAWA
MATERIAL PULLING SERVO MOTOR
SGM7G-09AFC61 0.85KW
2
YASKAWA
MATERIAL FEEDING/CORRECTING/INDENTATION MOTOR
130BYG-350A
4
SONGYANG
POUCHING MOTOR
110BYG-350B
4
SONGYANG
110 STEPPER MOTOR
110BYG-350A
10
SONGYANG
UP AND LOWER MOTOR
90BYG-350A
2
SONGYANG
STEPPER MOTOR 56
SY57STH56-2004A
8
SONGYANG
DIRECT CURRENT MOTOR
0.4KW
2
DIRECT CURRENT MOTOR
0.6KW
1
ASYNCHRONOUS THREE-PHASE MOTOR
90S-6
1
0.75KW
FREQUENCY CONVERTER
AVF200-0152
1
1.5KW
MAIN PNEUMATIC COMPONENTS: AIRTAC (TAIWAN); MAIN ELECTRICAL COMPONENTS: PANASONIC (JAPAN), SICK (GERMANY), DONLIM (CHINA&JAPAN), ETC.
EMAIL US FOR PRICE & PICTURES
INCLUDE OUR REFERENCE NUMBER
Learn More - V-1813 N95 MASK MAKING MACHINE, ROTARY ULTRASONIC DIE CUTTING
A. SEMI-AUTOMATIC N95 FACE MASK MACHINE
30 TO 45PCS/MIN
MAXIMUM ROLL DIAMETER: 600mm
NUMBER OF ROLLS FEEDING THE MACHINE: 4 ROLLS OR 4 LAYERS
WIDTH OF THE ROLL: 230mm
TOTAL KW OF THIS MACHINE: 3KW
FREQUENCY (KHZ) OF THE ROTARY ULTRASONIC DIE: 15KHZ 2600W
DIAMETER OF THE ROTARY DIE: 74mm
FLOOR SPACE DIMENSIONS OF THIS MACHINE: 3000mm X 1500mm
MACHINE WEIGHT: 400KGS
PACKING DIMENSIONS OF THE MACHINE: 1600mm X 1000mm X 1700mm(L X W X H)
HEIGHT OF THE MACHINE: 1960mmB. N95 EARLOOP MACHINE
15 TO 20PCS/MIN
NUMBER OF PAIRS OF EAR LOOPS DONE PER MINUTE: 15 TO 20PCS/MIN
FLOOR SPACE DIMENSIONS OF THE MACHINE: 1200mm X 1000mm
MACHINE WEIGHT: 350KGS
PACKING DIMENSIONS OF THE MACHINE: 1200mm X 1000mm X 1500mm(L X W X H)
HEIGHT OF THE MACHINE: 1300mm
SPOT WELDING IS USED TO ADHERE THE CLIP TO THE MESK. NO GLUE IS USED.C. N95 SEALING MACHINE
15 TO 20PCS/MIN
TOTAL KW OF THE MACHINE: 20K 2600W
FREQUENCY (KHZ) OF THE ROTARY ULTRASONIC DIE: 20K
FLOOR SPACE DIMENSIONS OF THE MACHINE: 600mm X 600mm
MACHINE WEIGHT: 100KGS
PACKING DIMENSIONS OF THE MACHINE: 700mm X 700mm X 1300mm (L X W X H)
HEIGHT OF THE MACHINE: 1200mmD. N95 NOSE CLIP MACHINE
15 TO 20PCS/MIN
15 TO 20PCS/MIN
SEE VIDEO OF HOW THE CLIOP IS ATTACHED TO THE MASK.
DIMENSIONS OF THE MACHINE: 500mm X 500mm
WEIGHT OF THE MACHINE: 20KGS
https://youtu.be/4IGKM5TxsqYPACKED: IN ONE WOODEN CASE,
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PACKAGE SIZE: 2000mm X 1500mm X 1900mm (L X W X H),
GROSS WEIGHT: ABOUT 1000KGS
WARRANTY OF MACHINE:1.5 YEARS
LEAD TIME IS 12 DAYS AFTER ORDER IS CONFIRMED - J-2792 MEDICAL FACE MASK SYNTHETIC BLOOD PENETRATION TESTER
USED FOR MEASURING THE RESISTANCE OF MEDICAL FACE MASKS TO PENETRATION BY A SPLASH OF SYNTHETIC BLOOD
BLOOD SPRAYING DISTANCE: 300 TO 310mm (APPROXIMATE, ADJUSTABLE)
NEEDLE INNER DIAMETER: 0.84mm
SPRAY SPEED: 4500mm PER SECOND, 5500mm PER SECOND, 6350mm PER SECOND
SIMULATED SYNTHETIC BLOOD PRESSURE: 10.6kPa, 16.0 kPa, 21.3 kPa, (i.e. 80mmHg, 120mmHg, 160mmHg)
SUPPORTS THE SPECIMEN MEDICAL FACE MASK ON THE TESTER’S CLAMPING DEVICE AND SPRAYS A FIXED VOLUME (~2ml) OF SYNTHETIC BLOOD SPLASHED HORIZONTALLY TO HIT THE MASK
TESTER CAN PROVIDE DIFFERENT BLOOD PRESSURES WITH PRECISION CONTROL VALVE TO GENERATE 2ml SYNTHETIC BLOOD WITH SURFACE TENSION OF 0.042 ± 0.002 N/m, WHICH MEETS THE REQUIREMENTS DEFINED IN STANDARDS BELOW:
ISO 22609
ASTM F1862
YY 0469-2011
GB/T 19083-2010LEAD TIME: 5 TO 7 WEEKS FROM RECEIPT OF ORDER
QUANTITY: 1
Learn More - How To Choose an N95 Respirator Mask For Coronavirus Prevention? All You Need to Know Before Buying Face Masks
How To Choose an N95 Respirator Mask For Coronavirus Prevention? All You Need to Know Before Buying Face Masks.
1. What’s an N95 mask?
An N95 respirator is a respiratory protective face mask, designed to help reduce the user’s exposure to airborne particles including very small particles (0.3 microns) and large droplets. N95 respirator face mask literally has a filtration efficiency of at least 95% against non-oily particles.
2. Differences between N95 mask and surgical mask?
Generally, the N95mask also includes an N95 surgical mask. So, here we will just compare a standard N95 particulate mask with a disposable surgical mask. Surgical masks are designed to be worn by healthcare professionals during surgery and nursing, to help prevent contamination of the surgical field or the patient by capturing liquid droplets that are expelled by the user.
An N95 particulate mask blocks at least 95 percent of very small (0.3 microns) test particles, and while a disposable surgical mask is fluid-resistant and protects the user against large particles (5 microns), droplets, sprays or splatter.
Different from a loose-fitting, disposable surgical mask, an N5 mask is tight-fitting to achieve a very close facial fit, which guarantees a minimal leakage around the edges of the mask when the user inhales. If properly fitted, the filtration capabilities of N95 respirators exceed those of disposable surgical face masks.Speaking of the N95 mask price and disposable surgical mask price, the N95 respirator mask is pricier than a surgical mask. In contrast, the N95 mask is reusable but the common surgical mask is disposable. Strictly speaking, N95 respirator masks should be worn for a maximum of eight hours while the disposable surgical mask is recommended to be replaced every four hours.
However, during the novel coronavirus outbreak, face masks are in short supply and everyone discards one or two face masks every day. A surgical mask could be used for a whole day in a good condition of no damage, no moisture, and no deformation. According to some researches, the N95 respirator mask used for two days still maintains a filtration efficiency of at least 95%, while the filtration efficiency of an N95 respirator used for three days reduced to 94.7%. So, if an N95 respirator is in good maintenance, you can wear it for at least 2 days, a week, maybe even a month.
3. Types of N95 mask
Generally, according to their intended use, the types of N95 masks include the standard N95 particulate respirators and N95 surgical respirator masks. Additionally, there are N95 masks with a breathing valve or not.
1) Differences between standard N95 particulate respirator and N95 surgical mask:
How to differentiate standard N95 particulate-filtering respirators and N95 surgical masks? The N95 surgical mask is literally a combination of N95 respirator and surgical mask, it is both certificated by NIOSH as an N95 respirator and also cleared by the FDA as a surgical mask. N95 surgical respirator masks are also referred to as medical respirators, healthcare respirators, or surgical N95s.
The significant difference between a standard N95 particulate respirator and an N95 surgical mask is that the N95 surgical mask is fluid-resistant while the standard N95 particulate respirator is not.
An N95 particulate respirator, also called N95 dust mask or N95 pollution mask, helps reduce very small particles inhaled by the user, and it is used for respiratory protection when the user might be exposed to particulate hazards. With a fluid resistance plus, an N95 surgical mask help reduce particles both inhaled and exhaled by the user, it is designed to be used during surgery and nursing tasks, whatever the user requires respiratory protection, expelled particulates or requires fluid resistance.
2) Differences between N95 masks with a breathing valve or not:
Many people question: Is an N95 mask with an exhalation valve better than the one without a valve?
In fact, the N95 respirators with an exhalation valve are not recommended to be used for coronavirus prevention, because the valve is a one-way vent that couldn’t keep your exhalation to yourself. It means that this valved N95 mask makes your breathing out easier and helps reduce heat build-up to avoid fogging up your glasses, however, it’s not that friendly to others.
Besides, the N95 mask with the valve is pricier than the one without a valve.4. What are the differences between N95, KN95, FFP2, and KF94?
When you search for the N95 respirators, there are many respirators such as KN95, FFP2, and KF94 that appeared in the same breath. What’s different between these respirators of different letters?
Actually, both the N95, KN95, FFP2 and KF94 respirators have almost the same filtration efficiency, it means that KN95, FFP2, and KF94 are as effective as the N95 respirator mask. The main difference between these respirators is that they are tested by different nations.
The N95 mask has a full name of NIOSH-certified N95 respirator, which means these respirators are tested of 95% filtration and certified by the U.S. National Institute of Occupational Safety and Health (NIOSH). The KN95 respirator is a particulate-filtering mask tested using the China criteria. The FFP2 is a filtering facepiece score of 94% filter capacity approved by Europe, and the KF94 is tested by Korea criteria.
To simply put, we could put these respirators into an equation as below:
N100 (99.97%) = FFP3 (99.95%) > N95 (95%) = KN95 (95%) = FFP2 (94%) = KF94 (94%) > KN90 (90%).
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Anti Virus Flu Mask Meets FFP2 N95 KN95 KF94 Guidance - L-7121 MASK PROTECTIVE EFFECT TESTING MACHINE -STANDARDS COMPLIANCE: GB/T 32610-2016
FOR TESTING THE EFFECTIVENESS OF DAILY PROTECTIVE MASKS
COLD GENERATED AEROSOL GENERATOR
PM2.5 SENSOR TO MEASURE AEROSOL CONCENTRATION
WITH SALT PARTICULATE AEROSOL GENERATOR AND OIL PARTICULATE GENERATOR
ELECTROSTATIC NEUTRALIZATION
EQUIPPED WITH TEMPERATURE AND HUMIDITY SENSORS, REAL-TIME DISPLAY OF AMBIENT TEMP
LASER DUST PARTICLE COUNTER
GAS SAMPLING FLOW: 1 TO 2 LITERS PER MINUTE
SAMPLING FREQUENCY: 20 TIMES PER MINUTE
RESPIRATORY SIMULATOR AND BREATHING SIMULATOR
POWER SUPPLY: 220 VOLTS, 50 OR 60 Hz (AS PER CUSTOMER)QUANTITY: 1
Learn More - J-2788 SEMI-AUTOMATIC DISPOSABLE FLAT MASK PRODUCTION LINE
3 LAYER MASKS CONSTRUCTED OF NONWOVEN AND MELTBLOWN FABRIC
MASK DIMENSIONS: 175 x 95mm (ADULT) & 145 x 90mm (CHILD)---COMPOSED OF TWO MACHINES, AS BELOW
1) AUTOMATIC MASK LAYER MAKING AND CUTTING MACHINE
CAPACITY: 200 TO 300 PIECES PER MINUTE
INCLUDES
• MATERIAL FEEDING FRAME
• MACHINE FRAME
• ALUMINUM NOSE STRIP INSERTION
• ULTRASONIC WELDING
• CONVEYOR
DIMENSIONS: 4600 x 500 x 2100mm
WEIGHT: 300 KGS
POWER: 220 VOLTS, 50 Hz (OR AS PER CUSTOMER)
2) MANUAL EAR BAND WELDING MACHINE
CAPACITY: 30 TO 40 PIECES PER MINUTE
INCLUDES
• WORKBENCH
• LIGHT
• AIR CYLINDER
• ULTRASONIC GENERATOR
• CONTROL SYSTEM
DIMENSIONS: 800 x 500 x 1000mm
WEIGHT: 43 KGS
POWER: 380 VOLTS, 50 Hz (OR AS PER CUSTOMER)WARRANTY: 1 YEAR FOR MAJOR COMPONENTS, LIFELONG SERVICE FOR THE USER
QUANTITY: 1 COMPLETE SEMI-AUTOMATIC LINE
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