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- J-2762 AUTOMATIC MASK MACHINE, 110 TRIPLE-LAYER MASKS PER MINUTE – NEW
MASK DIMENSIONS: 17.5 x 9.5mm
CAPACITY: 90 TO 110 PIECES PER MINUTE
MATERIAL: PP FABRIC
3 LAYERS
USES ULTRASONIC SEALING, 15 KHZ WHILE RUNNING
THERE IS ALUMINUM STRIP ON THE NOSE BRIDGE (ALUMINUM STRIP INSERTION)
DIMENSIONS: 7100mm x 3000mm x 1980mm
POWER: 10 KW
220 VOLTS, 5O OR 60 Hz
AIR PRESSURE: 0.6 MPAQUANTITY: 1
Learn More - V-1807 AUTOMATIC FACE MASK WITH OUTER EAR LOOP MACHINE, 120 MASKS PER MINUTE, FLAT TYPE
I. FUNCTION
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THE MACHINE IS FULLY AUTOMATIC EAR TO LOOP MASK MAKING MACHINE. THIS MACHINE INCLUDES ONE SET OF CS-175 AND 2 SETS CS-WD175 AND BY A UNIT OF AUTOMATED DISPENSER. MASK BODIES PRODUCED ON THE MASK MACHINE CAN BE ALLOCATED ONTO 2 SETS OF SUBSEQUENT MACHINES CONTROLLED BY PLC AT THE SPEED OF 0 TO 120 PIECES PER MINUTE. ALL OF OPERATIONS OF THE MACHINE ARE CONTROLLED THROUGH TOUCH SCREEN OR PLCS.
II. PROCESS
AFTER THE MACHINE MAKES THE MASK BODY, THE CONVEYOR BELT STRUCTURE TRANSPORTS THE MASK BODY PIECE TO THE CONNECTING CONVEYOR. THROUGH THE CONNECTION CONVEYOR MASK PLATE TO THE CONVEYOR BELT, AGAIN THROUGH THE CONVEYOR BELT THE MASK IS TRANSPORTED TO THE EAR PIECE SECTION TO THE FRONT OF THE MACHINE ABOVE THE FIRST MASK PLATE, FINALLY THROUGH THE CYLINDER DOWN THE MASK ONTO MASK EAR MACHINE DISC, FOLLOWED UP BY EAR MASKS FOR THE EARS OF THE BELT WELDING MACHINE AND THEN IT’S COMPLETE.
III. FEATURES:
1. MACHINE FRAME IS MADE OF ALUMINUM ALLOY, PREVENTED FROM RUST;
2. THE MACHINE CAN MAKE 1 TO 3 TYPES OF MASK BLANKS ACCORDING TO WHAT THE CUSTOMER REQUIRES.
3. THE SIZE OF THE MASK BLANK AND THE FOLDING LOCATION CAN BE ADJUSTED;
4. THE DIRECTION OF THE EAR LOOP IS OUTSIDE;
5. A COMPUTER PROGRAM CONTROL AND PHOTOELECTRIC DETECTION ACHIEVES A HIGH RELIABILITY AND LOW FAILURE RATE. - J-2730 AUTOMATIC DISPOSABLE SURGICAL MASK (N95) PRODUCTION LINE WITH PACKAGING -PRODUCES SURGICAL MASKS WITH FILTRATION EFFICIENCY OF NO LESS THAN 95% -CAPACITY: 50 MASKS (N95) PER MINUTE
ITEM 001 - MASK PRODUCTION MACHINE WITH (2) ULTRASONIC EAR STRAP WELDING DEVICES
FOR THE PRODUCTION OF SURGICAL MASKS WITH FILTRATION EFFICIENCY OF NO LESS THAN 95% (N95)
CAPACITY: 50 FOLDED N95 MASKS PER MINUTE
MASK DIMENSIONS: 175mm x 95mm
MATERIAL TYPE: 3 LAYERS OF POLYPROPYLENE NONWOVEN COMPOSITE FIBER
OPERATION CONTROLLED BY LCD TOUCH SCREEN
AUTOMATICALLY ALIGNS 3 ROLLS OF MATERIAL TO FEED IN (OUTER, FILTER AND INNER LAYERS)
PRESSES BOTH SIDES TOGETHER SYMMETRICALLY WHILE WELDING WITH ULTRASONIC HEAD
SPLITS TO 2 SERPATE WELDING DEVICES FOR EARLOOPS AND SENDS TO DIGITAL COUNTER
EARLOOPS ARE FINISHED WITH ULTRASONIC CUTTING AND WELDING
NOSE BRIDGE CAN BE PRODUCED WITH AUTOMATIC FEEDING, CUTTING AND ULTRASONIC WELDING
ULTRASONIC HEADS
VOLTAGE: 220 VOLTS
WATTS CAPACITY: 1500 WATT
FREQUENCY (KHZ): 20 KHZ
WARRANTY PERIOD FOR HEADS: 1 YEAR
COMPONENT MANUFACTURERS
SERVO MOTOR: PANASONIC / SCHNEIDER
CONTROL SYSTEM: PROPRIETARY
ULTRASONIC GENERATOR: PROPRIETARY, 220 VOLTS, 1.5 KW, 20 KHZ
SENSOR: OMRON / SICK
PNEUMATIC COMPONENT: SMC / FESTO
BELT: SAMSUNG / BANDO
MAIN BODY: PRE-MADE MATERIAL, WELDED ASSEMBLY
BEARINGS: NSK
BALL SCREWS: HIWIN
SECURITY DEVICE: SICK (SAFETY DEVICES TO PROTECT WORKERS)
TOTAL POWER: 4 KW
MACHINE MUST BE STOPPED TO FEED NEW ROLL OF MATERIAL
END OF ROLL DETECTOR INCLUDED: WHEN FABRIC IS FINISHED THE MACHINE WILL ALARM AND STOP
AIR PRESSURE: 0.6 MPa
VOLTAGE: 220 VOLTS, 60 Hz
DIMENSIONS: 6400mm x 4700mm x 1700mm
INCLUDES ELECTRONIC MANUAL BOOK (STORED ON USB MEMORY) AND WARRANTY CARD
OPTIONS (INQUIRE FOR PRICING): EAR STRAP FOLDER
ITEM 001 QUANTITY: 1 MASK PRODUCTION MACHINE AND 2 ULTRASONIC WELDING DEVICES FOR EAR STRAPS
ITEM 002 AUTOMATIC BAGGING MACHINE
SUITABLE FOR AUTOMATIC BAGGING OPERATIONS FOR VARIOUS MASK TYPES
MOTOR CONTROL SYSTEM: SERVO (3), AUTOMATICALLY SETS BAG LENGTH (UP TO 400mm) FOR SPECIFIED BAGGING LENGTH, WITH ANTI-AIR BAG , AUTOMATICALLY DETECTS PRODUCT BASE POINT AND MATERIAL POSITION, AUTOMATIC STOP WHEN OUT OF MATERIAL & STARTS WHEN MATERIAL IS PRESENT
FAST & CONVENIENT SETTING OF PARAMETERS, STORES SETS OF PARAMETERS FOR MULTIPLE PRODUCTS, OPERATOR CAN CHOOSE PARAMETERS ACCORDING TO PRODUCT SIZES
DIAGNOSTICS SYSTEM CLEARS ERROR & RESETS IN SINGLE STEP
HIGHLY SENSITIVE PHOTOELECTRIC EYE COLOR MARK TRACKER, DIGITAL INPUT SEAL/CUT POSITION MAKES SEAL & CUT POSITIONS MORE ACCURATE
TEMPERATURE CONTROLLED WITH INDEPENDENT PID, ALLOWS FOR VARIOUS MATERIALS IN PACKAGING
SIMPLE TRANSMISSION SYSTEM ALLOWS FOR EASY MAINTENANCE AND RELIABILITY
ALL CONTROLS SET BY SOFTWARE ALLOWING FOR ADJUSTING OF FUNCTIONS AND UPGRADES
MATERIALS
PVC FILM (HEAT SEALING), BOPP, OPP, CPP, ALUMINIZED PET FILM, ALUMINUM-PLASTIC FILM, PAPER FILM, PAPER GLUE, OTHER SINGLE- OR MULTIPLE-LAYERED HEAT-SEALED DIALYZABLE MATERIALS, ETC.
LENGTH OF PACKAGE BAGS: ≤400mm
WIDTH OF PACKAGE BAGS: 100 TO 165mm
HEIGHT OF PRODUCT: 55mm MAXIMUM
LENGTH OF FILM: 360mm MAXIMUM
DIAMETER OF FILM ROLL: 320mm MAXIMUM
CAPACITY/SPEED OF PACKAGING: 40 TO 230 BAGS PER MINUTE (1 TO 20 PIECES PER BAG)
POWER: 220 VOLTS, 50 OR 60 Hz, 2.4 KW
DIMENSIONS: 4050mm x 750mm x 1450mm
WEIGHT: APPROXIMATELY 300 KGS
COMPONENT MANUFACTURERS
TOUCH SCREEN: WEINVIEW
SERVO MOTOR: DORNA / WEIDE
SERVO CONTROLLER: DORNA / WEIDE
PROXIMITY SWITCH: OMRON
PHOTOELECTRIC SWITCH: OETAI
TEMPERATURE CONTROLLER: YATAI
SOLID STATE RELAY: SCHNEIDER
INTERMEDIATE RELAY: WEIDMUELLER
OPTIONS, INQUIRE FOR PRICING: STRAIGHT GRAIN SEALING, STAINLESS STEEL FRAME, CODE STAMPER (PRODUCTION DATE), EXHAUST (PINHOLE EXHAUST FEATURE)
ITEM 002 QUANTITY: 1 BAGGING MACHINE
ENTIRE LINE COMPOSED OF ITEM 001 AND ITEM 002 - L-7134 PP NONWOVEN FABRIC PRODUCTION LINE, SPUNBONDED, MELT BLOWN
EFFECTIVE WIDTH: 1600mm
DAILY OUTPUT: 10,000 KGS PER DAY
WEIGHT RANGE: 10 TO 150 GSM
FILAMENT DIAMETER: 1.6 TO 2.0 DENIER
SPEED: 350 TO 400 METERS PER MINUTE
RAW MATERIAL: POLYPROPYLENE (PP)
DIMENSIONS: 35,000 X 15,000 X 11,000mm
VOLTAGE: 380 VOLTS, 3 PHASECONSISTING OF:
SPUNBOND EQUIPMENT
PP VACUUM SUCTION MACHINE (2)
7800 TO 900 KGS PER HOUR
AIR CAPACITY: 300 CUBIC METERS PER HOUR
POWER: 7.5 KWMASTER BATCH DOSING UNIT (2)
ACCURACY: 0.01%EXTRUDER (2)
DIAMETER: 130mm
SINGLE SCREW (2)
HEATING SYSTEM: ELECTRICITY
MOTOR: 75 KWMELT FILTRATION MACHINE (2)
PIPE SIZE: 50mm
FILTER AREA: 3.5 SQUARE METERS
MELT FLOW: 650 KGS PER HOUR
DOUBLE FILTRATION CHAMBERMELTING PUMP (2)
40 RPM
FLOW CAPACITY: 400 KGS PER HOUR
POWER: 7.5 KWSPINNING BEAM (2)
DIMENSIONS: 1900 X 256mm
HANGER TYPE MELT DISTRIBUTION
HEATING SYSTEM: OIL
WORKING TEMPERATURE: 200 TO 260 CELSIUSSPINNERET (4)
HARDNESS: 30
SIZE: 1900mm LONG X 256mm WIDE
HOLE DIAMETER 0.45mm
HOLE QUANTITY: 6500 HOLE PER METERQUENCHING UNIT (2)
WORKING TEMP: 20 CELSIUS
AIR FLOW CAPACITY: 12,000 CUBIC METERS/H
AIR PRESSURE: 6500
FILTER SIZE: 80#FILAMENT DRAFT UNITS (2)
AIR PRESSURE: 5020PA
AIR FLOW CAPACITY: 12,000 CUBIC METERS/H
INSIDE TEMP: 10 TO 25 CELSIUS
FILAMENT FINENESS: 1.6 TO 2.0 DENIERMELT BLOWN EQUIPMENT
VACUUM SUCTION MACHINE (2)
LOAD CAPACITY: 700 TO 900 KGS PER HOUR
AIR CAPACITY: 300 CUBIC METERS/H
POWER: 7.5 KWMASTER BATCH DOSING UNIT (2)
4 HOPPERS
200 KGS HOPPER LOADEXTRUDER
DIAMETER: 105mm
SINGLE SCREW
MOTOR: 18.5 KWMELT FILTER
DOUBLE CYLINDER
HYDRAULIC
MELT FLOW CAPACITY: 450 KGS/HR
FILTER SIZE: 150mm DIAMETER
ELECTRIC HEATINGMELTING PUMP
SPEED: 40 RPM
MELT FLOW CAPACITY: 450 KGS PER HOUR
POWER: 7.5 KWMELT BLOWN DIE SPINNARET
SPINNERET HOLE SIZE: 0.32 TO 0.35mm
HOLE DISTANCE: 40 TO 42 PER INCH
FABRIC WEIGHT: 2 TO 200 GSMHIGH PRESSURE AIR BLOWER
AIR FLOW CAPACITY: 70 TO 100 CUBIC METERS PER MINUTE
AIR PRESSURE: 100 KPA
POWER: 200 KWWEB FORMING MACHINE
SPEED: 100 METERS PER MINUTEELECTRIC TREATMENT
VOLTAGE: 220 VOLTS, 50 Hz
INPUT CURRENT: 3A
OUTPUT VOLTAGE: 60 KV
TREAT WEB WIDTH: 1.6 METERSHOT AIR HEATING MACHINE
WORKING TEMP: 350 CELSIUS
PRESSURE: 0.8 KPA
HEATING: ELECTRIC
POWER: 200 KWTHERMAL CALENDER
PROCESSING SPEED: 400 METERS PER MINUTE
ROLLER SIZE: 2000mm LONG, 520mm DIAMETER
EMBOSSING ROLLER: 1
LINEAR PRESSURE: 30 TO 125 N/mm
HEATING SYSTEM: OILHYDROPHILIC MACHINE
SPEED: 400 METERS PER MINUTE
FEEDING SYSTEM: DOUBLE KISSING ROLLER
KISS ROLLER DIAMETER: 215mm
LIQUID TANK: 200 KGS WITH HEAT/WARM AND MIXDRYING SYSTEM:
INFRARED + HOT AIR
DRIVE ROLL SIZE: 150mm
HEATING EQUIPMENT: QUARTZ HEATER, HOT AIR BLOWER, EXHAUST AIR BLOWERINSPECTION MACHINE
EFFECTIVE WIDTH: 1600mm
INSPECTION SPEED: 400 METERS PER MINUTE
INSPECT GSM: 10 TO 40 GSMAUTOMATIC WINDING MACHINE
SPEED: 400 METERS PER MINUTE
ROLLER DIAMETER: 2000mm
ROLLER EXCHANGE SYSTEM: AUTOMATIC
FABRIC INSPECTOR: ONLINE
POWER: 15 KWHIGH SPEED SLITTING MACHINE
PROCESS SPEED: 800 METERS PER MIN
ROLL DIAMETER: MAX 1500mm
SLITTING WIDTH: 80mm
PAPER TUBE SIZE: 76mm DIAMETER
AUTO TENSILE CONTROL: AVAILABLE ONLINE
METER COUNTING: AVAILABLE ONLINEOIL HEATER (4)
HEATING POWER: 60 KW
MOTOR POWER: 7.5 KW
OIL PUMP FLOW: 30 CUBIC METERS PER SECOND
PRESSURE: 0.4 KPAWATER CHILLER
DRIVE SYSTEM: SCREW
COOLING CAPACITY: 300,000 CALORIES
TEMP: 0 TO 20 CELSIUS
POWER: 110 KWAIR BLOWER
SPEED: 1450 RPM
AIR BLOW CAPACITY: 12,000 CUBIC METERS PER HOUR
PRESSURE: 5200 PA
POWER: 30 KW x 3, 45 KW x 1AIR COMPRESSOR
DRIVE SYSTEM: SCREW
PRESSURE: 0.8 KPA
POWER: 15 KWHEATING SYSTEM: ELECTRIC
TEMP: 350 CELSIUS
HEATING TIME: 6 TO 8 HOURS
POWER: 4 KWULTRASONIC CLEANING MACHINE
3mm THICK
SIZE: 2000 X 500mm
FREQUENCY VIBRATION: 100 KHZ
TEMP: 40 CELSIUSELECTRONIC PANEL BOARD
PLATFORM
Learn More - J-2765 3-LAYER FACE MASK PRODUCTION MACHINE – 150 MASKS PER MINUTE
CAPACITY: 100 TO 150 MASKS PER MINUTE
PRODUCES MASKS WITH 3 LAYERS OF POLYPROPYLENE NONWOVEN MATERIAL
AIR PRESSURE: 0.6 MPa, AIR CONSUMPTION 300 LITERS PER MINUTE
CONTROLLED BY PLC, OPERATED BY LCD TOUCH SCREEN
USES ULTRASONIC WELDING FOR EAR STRAPS
VOLTAGE: AS PER CUSTOMER
TOTAL POWER: 11 KW
DIMENSIONS: 6850 x 3520 x 1990mm
WEIGHT: ≤ 5000kgMASK SURFACE LAYER, FILTER LAYER AND BOTTOM LAYER CAN BE ALIGNED AND FED TO THE MACHINE AUTOMATICALLY
BOTH SIDES ARE SYMMETRICAL WITH ULTRASONIC PROCESS STATIONS FOR EAR STRAP WELDING
AFTER WELDING, THE MASKS ARE COUNTED AND PILED TOGETHER AUTOMATICALLY
MASKS ARE DISTRIBUTED EVENLY TO TWO SETS OF EAR STRAP STATIONS BY AUTOMATIC TRANSMISSION SYSTEM, CONTROLLED BY PLC
NOSE CLIPS CAN BE AUTOMATICALLY FED, CUT AND ULTRASONICALLY WELDEDTHE CUP TYPE MASK PRODUCTION LINE CAN BE SENT BY AIR, THERE ARE TOTAL 5 WOODEN CASES, SIZES AND WEIGHT AS BELOW:
1. 2500 X 1100 X 1000mm, 1PC, 250KGS
2. 2200 X 1000 X 1500mm, 1PC, 1100KGS
3. 3000 X 1200 X 1500mm, 1PC, 1100KGS
4. 3000 X 1200 X 1500mm, 1PC, 1100KGS
5. 1900 X 700 X 1150mm, 1PC, 250KGSIF CUSTOMER NEEDS MASK BAGGING MACHINE TO CONNECT WITH DISPOSABLE MASK PRODUCTION LINE, THERE WILL BE ANOTHER TWO WOODEN CASES EXTRA, BUT WILL CANCEL THE FIFTH WOODEN CASE, SIZES AND WEIGHT AS BELOW:
1. 1580mm X 840MM X 1510 mm,1PCS, 340KG
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2. 2540 mm X 540 mm X 1510 mm,1PCS, 80KG - V-1806 HALF AUTOMATIC FACE MASK WITH INNER EAR LOOP PACKING MACHINE
I. FUNCTION
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THIS MACHINE IS USED TO PACK DISPOSABLE SURGICAL FACE MASK WITH THE SIZE OF 190 X 65mm. IT CAN ALSO BE USED TO PACK OTHER PRODUCTS SUCH AS WET TISSUE.
II. FEATURES:
1. ONE SET OF INK TO INJECT PRINTER IS INCLUDED; IT CAN BE USED TO PRINT THE DATA AND OTHER INFORMATION.
2. THE AIR COMPRESSOR EQUIPMENT IS OPTIONAL.
3. PACKING MATERIAL: SINGLE TO SIDE HEAT TO SEALING PACKAGING FILM MATERIALS, SUCH AS OPP, CPP, OPP COMPOSITE PE, PET COMPOSITE PE, SINGLE TO LAYER OR COMPOSITE PACKAGING FILM MATERIALS.
4. BAG FORM: BACK TO SEALED PACKING, CAN BE CUSTOMIZED.
5. VERTICAL/HORIZONTAL SEAL: RETICULATED PACKAGING/VERTICAL AND RETICULATED PACKAGING.
III. SPECIFICATION:
NAME: PILLOW PACKING MACHINE
TYPE KD TO 350
APPLICATION: FOR ALL KINDS OF OPP HEAT TO SEALING FILM, COMPOSITE FILM, SPRAY FILM PAPER, ALUMINUM FOIL FILM, ALUMINUM PLASTIC COMPOSITE FILM
MACHINE SIZE: 4600 X 850 X 1500
PACKING SPEED: 60 TO 220 BAG/MIN
MAX. PACKING SIZE: 330mm, 150mm, 80mm. LENGTH: 330mm, WIDTH: 150mm, HEIGHT: 80mm
MIN. PACKING SIZE: 50mm, 10mm, 5mm. LENGTH: 50mm, WIDTH: 10mm, HEIGHT: 5mm
ELECTRICAL: AC220V, 2.7KW
AIR PRESSURE 0.5 TO 0.7 MPA
AIR CONSUMPTION: >0.36 (M3/H)
(DB) NOISE: 60 TO 70DB
MACHINE WEIGHT: 550KG
MOTOR FREQUENCY ADJUST: 0 TO 50HZ
AUTOMATIC CONTROL
AUTOMATIC PRINTING
STANDARD: GMP STANDARD, PACKAGING MACHINE ENTERPRISE STANDARD
APPROVAL: ISO9001:2000, CE ISO:2000 - 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 - J-2752 FACE MASK PRODUCTION MACHINE – 120 PIECES PER MINUTE
COMPOSED OF
FACE MASK BLANK MAKING MACHINE
AUTOMATICALLY PRODUCES THE MAIN PART OF THE MASK
MACHINE HANDLES FEEDING, ALUMINUM STRIP INSERTION, CUTTING, FOLDING, ULTRASONIC WELDING, CUTTING
OUTPUT: 120 PIECES PER MINUTE
VOLTAGE: 220 VOLTS
POWER CONSUMPTION: 2.7 KW
DIMENSIONS: 3345 x 630 x 1830mm
CAN PRODUCE 3 TO 4 DIFFERENT MASK BLANKS ACCORDING TO PRODUCTION REQUIREMENTS
FOLDING LOCATION AND SIZE OF MASK IS ADJUSTABLE
COMPUTER CONTROLS AND PHOTOELECTRIC DETECTION ENSURE LOW FAILURE RATE AND HIGH RELIABILITY
FRAME CONSTRUCTED OF ALUMINUM ALLOY
QUANTITY: 1FACE MASK TRANSFERRING MACHINE
TRANSFERS THE MASKS TO THE ULTRASONIC EAR STRAP WELDING MACHINE
QUANTITY: 1ULTRASONIC EAR STRAP WELDING MACHINE
WELDS THE ELASTICS ON BOTH EDGES OF THE MASK
AUTOMATIC COUNTING
AUTOMATICALLY CONVEYS THE FINISHED MASKS TO PACKING PROCESS (PACKING BY HAND)
COMPUTER CONTROLS AND PHOTOELECTRIC DETECTION ENSURE LOW FAILURE RATE AND HIGH RELIABILITY
FRAME CONSTRUCTED OF ALUMINUM ALLOY
QUANTITY: 2PRODUCES MASKS WITH DIMENSIONS: 175mm x 95mm (ADULT SIZE)
FOR MASK TYPES: 2 LAYERS OF NONWOVEN CLOTH, 3 LAYERS OF NON-WOVEN FABRIC MASKS, 4 LAYERS OF ACTIVATED CARBON MASKS
• 2 LAYER FACIAL MASK: NONWOVEN, ALUMINUM STRIP, EAR STRAP WELDING
• 3 LAYER FACIAL MASK: NON-WOVEN, ALUMINUM STRIP, EARLOOP WELDING, FILTER COTTON (FILTER PAPER)
• ACTIVATED CARBON MASKS: NONWOVEN, ALUMINUM STRIP, EARLOOP WELDING, FILTER COTTON (FILTER PAPER), ACTIVATED CARBON CLOTHTECHNICAL PARAMETERS
OVERALL DIMENSIONS: 6500 L x 4000 W x 2000 H (mm)
PRODUCTION EFFICIENCY: 95%
PRODUCT SIZE: 175 x 95mm (ADULT SIZE)
FACIAL MASK LAYERS: 3 TO 4 LAYERS
POWER: 9 KW
AIR PRESSURE REQUIRED: 0.6 MPA
AIR CONSUMPTION: 300 LITERS PER MINUTE
WEIGHT: APPROXIMATELY 1800 KG
GROUND WEIGHT BEARING: ≤ 500KG/m2
ALL OF THE MAIN DRIVING PARTS ARE PROTECTED BY PROTECTIVE COVERQUANTITY: 1 COMPLETE LINE
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