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- ADVANCED LEVEL SINGLE NOZZLE ELECTROSPINNING UNIT - DRUM COLLECTORREFERENCE NUMBER: A-2477 ADVANCED LEVEL SINGLE NOZZLE ELECTROSPINNING UNIT - DRUM COLLECTOR MACHINE IS A LABORATORY SCALE ELECTROSPINNING UNIT WITH A SINGLE NOZZLE. THE STANDARD MACHINES HAVE A 500 RPM ROTATING DRUM COLLECTOR AND A FLAT COLLECTOR. THERE ARE OPTIONAL ACCESSORIES UPON REQUEST FOR FUNCTIONALITY IMPROVEMENT. OPERATION PARAMETERS LIKE THE NEEDLE-COLLECTOR DISTANCE AND HIGH VOLTAGE VALUE COULD BE AUTOMATICALLY ADJUSTED FROM THE USER PANEL, WITH HIGH PRECISION. THE SYSTEM COMES WITH AN ENCLOSED CABINET MAKING IT POSSIBLE TO ADD TEMPERATURE AND RELATIVE HUMIDITY CONTROL SYSTEMS. SPECIFICATIONS: SPINNING-TYPE: BOTTOM-UP SPINNING CHASSIS: ELECTROSTATICALLY PAINTED STEEL FEEDING AREA MATERIAL: PE 1000 (HIGH DENSITY, CHEMICAL RESISTANT) COLLECTOR MATERIAL: 7000 SERIES ALUMINUM ALLOY, STAINLESS STEEL LED ILLUMINATION EXHAUST FAN ATMOSPHERE CONTROL (OPTIONAL) TOTAL WEIGHT: APPROX.150 KGS DIMENSIONS: 770 X 675 X 1040 mm HIGH VOLTAGE POWER SUPPLY VOLTAGE RANGE: 0 TO 40 KV VOLTAGE PRECISION: 0.1 KV MAX CURRENT: 0.125 MA HIGH PRECISION MICRO PUMP FLOW RATE: 0.01 TO 4464 ML/H (BD 60 ML SYRINGE) FLOW RATE PRECISION: 0.01 ML/H AVAILABLE SYRINGES STANDARD: ALL TYPES ARE AVAILABLE FEEDING AREA NUMBER OF NOZZLES: 1 NOZZLE NOZZLE MATERIAL: ELECTRICALLY CONDUCTIVE STAINLESS STEEL NOZZLE INNER DIAMETER: 0.8 mm COMPATIBLE WITH STANDARD SYRINGE NOZZLES MINIMUM REQUIRED SOLUTION FOR SINGLE NOZZLE FEEDING: 2 ML SPINNING DISTANCE DISTANCE BETWEEN NOZZLE AND COLLECTOR: 33.5 TO 233.5 mm DISTANCE ADJUSTMENT PRECISION: 1 mm ROTATING COLLECTOR DRUM COLLECTOR MATERIAL: ALUMINUM DIMENSIONS OF DRUM: 100 X 150 mm FIBER DEPOSITION AREA: 314 X 150 mm DRUM ROTATING SPEED: 100 TO 500 RPM SURFACE SPEED: 52.3 CM/S TO 261.6 CM/S STATIONARY PLATE COLLECTOR MATERIAL: STAINLESS STEEL DIMENSIONS OF STATIONARY PLATE: 370 X 130 mm UNIQUE USER INTERFACE 9" TOUCH SCREEN CONTROL PANEL WITH WELL DESIGNED USER FRIENDLY INTERFACE FULLY ABLE TO CONTROL ALL PARAMETERS SAVING & RECALLING ALL PARAMETERS VIA RECIPE & RECALL FUNCTION SAFETY FUNCTION SAFE DOOR EMERGENCY BUTTON & SAFETY RELAY HV WARNING LIGHT ELECTRICAL ISOLATED & GROUNDED CABINET OVER CURRENT PROTECTION FULLY SEALED CABINET TECHNICAL REQUIREMENTS POWER: 220 VOLTS AND 50/60 HZ @ MAX 25A GROUNDING: EXTERNAL GROUNDING LINE AREA: MIN. 1000 X 1000 mm WORKBENCH ABLE TO CARRY MINIMUM 150 KGS. Learn More
- SPINNBAU CARDING LINE, YEAR 2013REFERENCE NUMBER: T-6848 SPINNBAU CARDING LINE, YEAR 2013 BRAND: SPINNBAU SHORT DESCRIPTION: CARDING LINE YEAR: 2013 INSTALLED 2014 LIKE NEW, LITTLE RUN TIME 4 HOPPER TEMAFA BLEND LINE, 1600mm WIDE, 1 WITH CONDENSER FED FROM TRIM MACHINE CARDING WILLOW – 800mm WIDE FEED BELT AND 1200mm WIDE – TEMAFA TEMAFA MIXMASTER BLENDING BIN – 3000mm WIDE X 8000mm LONG X 4600mm HIGH (FILL HEIGHT 3000mm). 72 CUBIC METER CAPACITY. TEMAFA FINE OPENER – 2000mm WIDE WITH PINS 3000mm SPINNBAU CARD FEEDING UNIT – FEED TRUNK, VIBRATING CHUTE, WEIGHT BELT 708mm BREAST SECTION WITH 3 WORKERS AND STRIPPERS, 1500mm MAIN WITH 5 W/S AND (2) 708mm DOFFERS. 1 FOUNDATIONS AND PLATFORMS. DILO PROFILINE – BATT WEIGHT CONTROL SYSTEM MAHLO WEIGHT MEASURING UNIT – QUALISCAN CMS-12 DILO LAYER CROSSLAPPER – TYPE DLS 30/60 – 3000mm INFEED AND UP TO 6000mm LAYDOWN. MAX WEB HEIGHT 650mm. MAXIMUM SPEED 125M/MIN. SPINNBAU LAP DRAFTER TYPE VST 19 – MAX 6000mm WORKING WIDTH. 9 ROLLER PAIRS. LIFTING DEVICE TO ALLOW FOR 600mm CLEARANCE. 159mm ROLLER DIAMETER. INFEED HEIGHT 650 mm BRUCKNER THERMOBONDING OVEN – 5000mm OVEN WITH 3 HEATING AND 2 COOLING ZONE. MAGNETIC BELT. 3 NATURAL GAS MAXON BURNER. SLITTING – 9 POSITION BRUCKNER CRUSH CUTTER SLITTING HEADS. PNEUMATIC LIFTING. 450mm KNIFE DIAMETER CROSS CUTTER – ROTARY CUTTER STYLE WITH CLAMPING. CAPABLE OF 3 CUTS/MINUTES FOR MATERIALS UP TO 200mm THICK. WINDING – ASCENDING BATCH STYLE WINDER. MAX ROLL DIAMETER OF 1200mm. 3000mm DRIVEN FEED CONVEYOR. MANDREL GUIDANCE SYSTEM, MANUALLY ADJUSTABLE BRAKE SYSTEM FOR CONTROLLING TENSILE FORCE AND COMPACTION. TEMAFA FILTER HOUSE – TFS 50. MAX FLOW 50,000 CUBIC METER/H ELECTRICL INFO – 3 X 480V/60Hz. CONTROLS 110V AC/24 DC. SIEMENS PLC QUANTITY: 1 Learn More
- T-6546 PFE TESTER FOR PELLET FILTRATION EFFICIENCY OF SURGICAL MASKREFERENCE NUMBER: T-6546PFE TESTER FOR PELLET FILTRATION EFFICIENCY OF SURGICAL MASKINTRODUCTIONMEDICAL SURGICAL MASK PARTICLE FILTRATION EFFICIENCY PFE TESTER IS SUITABLE FOR MEDICAL INSTRUMENT INSPECTION CENTER, SAFETY PROTECTION INSPECTION CENTER, LABOR PROTECTION INSPECTION CENTER, DRUG INSPECTION CENTER, DISEASE PREVENTION AND CONTROL CENTER, TEXTILE INSPECTION CENTER, HOSPITAL, MASK AND RESPIRATOR MANUFACTURERS, ETC.FEATURESTHE PFE TESTER FOR PARTICLE FILTRATION EFFICIENCY OF SURGICAL MASKS IS EQUIPPED WITH A SPECIAL SALT AEROSOL GENERATOR, WHICH CAN PRODUCE AEROSOLS WITH SPECIFIC PARTICLE SIZE AND CONCENTRATION.EQUIPPED WITH A SERIES OF SPECIAL FIXTURE, SUITABLE FOR THE DETECTION OF ALL KINDS OF MASKS.BUILT-IN HIGH LIFE PHOTOMETER MODULE, SAMPLING TIME ACCUMULATION, PROMPT LIGHT CLEANING.AUTOMATIC CONTROL OF AEROSOL GENERATION, AUTOMATIC CALCULATION OF CAPTURE EFFICIENCY AND MASK AIRFLOW RESISTANCE, REDUCE HUMAN INTERVENTION.BUILT-IN HIGH PRECISION ELECTRONIC FLOWMETER AND HIGH PERFORMANCE SAMPLING PUMP TO ENSURE FLOW STABILITY.PARAMETERTEST FLOW: PARAMETER RANGE: (5 ~ 100) L/MIN; RESOLUTION: (5 ~ 100) L/MIN;MAXIMUM ALLOWABLE ERROR: ±1%PRESSURE DETECTION RANGE: PARAMETER RANGE: (0 ~ 2500) PA; RESOLUTION: 0.1PA; MAXIMUM ALLOWABLE ERROR: ±1%CONCENTRATION DETECTION RANGE: PARAMETER RANGE: (0.001 ~ 100) 0 G/L;DETECTION ACCURACY: 1% OF THE READ VALUE IN THE RANGE OF 0.01% TO 100%DETECTION REPEATABILITY: 5% OF THE READ VALUE IN THE RANGE OF 0.01% TO 100% MEDIAN DIAMETER OF SALT AEROSOL PARTICLES (CMD): (0.075±0.02)MMEDIAN AEROSOL PARTICLE NUMBER DIAMETER (CMD) (OPTIONAL): (0.185±0.02) MOPERATING TEMPERATURE: 20±5CINSTRUMENT NOISE: <60DB(A)POWER SUPPLY: AC220V±10%, 50HZMAIN MACHINE SIZE: (LENGTH 700 X WIDTH 720 X HEIGHT 1450) mmQUANTITY: 1
- T-6550 MEDICAL PROTECTIVE CLOTHING BLOOD SYNTHETIC PENETRABILITY TESTER
REFERENCE NUMBER: T-6550
MEDICAL PROTECTIVE CLOTHING BLOOD SYNTHETIC PENETRABILITY TESTER
TECHNICAL SPECIFICATIONS AND CONFIGURATION:
1. THE INSTRUMENT ADOPTS AN AIR SOURCE THAT CAN PROVIDE (0.5 ~ 30±0.1) KPA PRESSURE TO CONTINUOUSLY PRESSURIZED THE SAMPLE, WHICH IS NOT RESTRICTED BY THE SPACE OF THE TEST SITE;
2. THE AIR PRESSURE RANGE CAN BE ADJUSTED FREELY, AND THE ADJUSTMENT RANGE (0.5 ~ 30) KPA;
3. COLOR TOUCH SCREEN DISPLAY AND OPERATION;
4. THE SAMPLE CLAMPING PAD IS PROCESSED WITH IMPORTED SPECIAL ALUMINUM PROFILES, WHICH IS LIGHT IN MATERIAL, CLEAN IN SURFACE AND NEVER RUSTS.
5. THE INSTRUMENT ADOPTS IMPORTED SPECIAL ALUMINUM WIRE DRAWING PANEL, EQUIPPED WITH METAL KEYS, SENSITIVE OPERATION, NOT EASY TO DAMAGE;
6. CLAMPING DEVICE FOR INSTRUMENT SAMPLES, EQUIPPED WITH LOCKING PROTECTION, TO PREVENT THE SYNTHETIC BLOOD FROM SPLASHING AROUND;
7. CLAMPING FORCE IS ACCURATE AND RELIABLE;
8. THE TEST TANK IS EQUIPPED WITH A SPECIAL PLACEMENT DEVICE, WHICH IS CONVENIENT FOR CUSTOMERS TO OPERATE;
9. THE TEST TANK IS PROCESSED WITH SPECIAL 316 STAINLESS STEEL, AND THE TOP IS EQUIPPED WITH A SPECIAL COVER FOR HIGH TRANSPARENT PROTECTION;
10. THE WASHER BELOW THE SAMPLE IS MADE OF HIGH-QUALITY PTFE MATERIAL AFTER SPECIAL PROCESSING;
11. SQUARE METAL BLOCK NET: OPEN SPACE ≥50°%; BENDING ≤5mm AT 30KPA;
12. INSTRUMENT TIME CONTROL ACCURACY ≤01 SECONDS;
13. THE SHELL OF THE INSTRUMENT IS MADE OF HIGH-QUALITY METAL BAKING PAINT, WHICH IS BEAUTIFUL AND GENEROUS.
14. EQUIPPED WITH PRINTER INTERFACE, CONNECTED TO THE PRINTER CAN DIRECTLY PRINT DATA REPORTS.
TECHNICAL PARAMETERS:
1. SAMPLE SIZE: 75mm X 75mm
2. TEST AREA: 28.26 SQUARE CENTIMETERS
3. AIR PRESSURE ADJUSTMENT RANGE (0.5 ~ 30) KPA
4. EXTERNAL SIZE: 500mm X 500mm X 500mm (L X W X H)
5. WEIGHT OF THE INSTRUMENT: 40 KG
6. POWER SUPPLY: AC220V, 50HZ,SCOPE OF SUPPLY: 1. ONE MAIN MACHINE; 2. TWO PTFE GASKETS; 3. TWO ORDINARY WASHERS; 4. ONE METAL BLOCKING NET; 5. A SET OF SPECIAL LOCKING TOOLS; 6. ONE HIGH-QUALITY SILENT AIR PUMP, [NOTE: SAFETY PRODUCTION LICENSE IS NOT INCLUDED]. 7. EQUIPPED WITH PRINTER INTERFACE; 8. ONE SAMPLE TEMPLATE; 9. ONE PRODUCT CERTIFICATE; 10. ONE COPY OF PRODUCT OPERATION MANUAL.
OPERATION INSTRUCTION:
INSERT THE AIR PUMP OUTPUT PIPE INTO THE OIL AND WATER SEPARATOR OF THE INSTRUMENT AS REQUIRED (PRESSURE 0.1-0.3MPA).
AFTER SWITCHING ON THE POWER, THE STARTUP INTERFACE (NAME OF THE DEVICE) IS DISPLAYED.
PRESS THE "ENTER" BUTTON TO ENTER THE TEST INTERFACE, AS SHOWN IN THE FOLLOWING FIGURE:
CLICK "SETTING” BUTTON, GET INTO PARAMETER SETTING SCREEN, AS BELOW THIS SCREEN CAN SET THE SYSTEM TIME, DATE AND TESTING TIME, AFTER SETTING, CLICK "SAVE” BUTTON TO KEEP THE SETTING DATA. (NOTE: IT REQUIRES 5 MINUTES IN THE STANDARD)
QUANTITY: 1
Learn More - P-8696 ULTRASONIC SEWING MACHINE
REFERENCE NUMBER: P-8696
ULTRASONIC SEWING MACHINE
CAN BE USED WITH EITHER 20 KHz, 30 KHz OR 40 KHz EQUIPMENT
LED DISPLAY FOR EASY PROCESS MONITORING
19” (483mm) THROAT
INDEPENDENT CONTROLS FOR SLITTING AND ROTARY ANVIL WELDING
DUAL SEALING CAPABILITIES WITH INDEPENDENT ADJUSTMENTS
EDGE GUIDING, REWINDING, AND FEED ROLLS CAN BE USED
CAN BE OPERATOR CONTROLLED AS A BENCHTOP UNIT OR INTEGRATED INTO AN EXISTING LINE
QUANTITY: 1
- T-6575 NON-INVASIVE VENTILATOR
NON-INVASIVE VENTILATOR
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CERTIFICATE: CE
MEDICAL VENTILATOR
TECHNICAL PARAMETERS OF DOUBLE LEVEL VENTILATOR
VENTILATOR TYPE: ELECTRIC CONTROL
SCOPE OF APPLICATION: TREATMENT AND TITRATION OF SLEEP APNEA HYPOPNEA SYNDROME, SEVERE SNORING, AND RESPIRATORY INSUFFICIENCY.
DISPLAY INTERFACE: 3.5-INCH LED SCREEN, CHINESE OPERATING SYSTEM
*VENTILATION MODE: CPAP, S, S/T, T
PRESSURE RANGE:
PRESSURE RANGE: 4-30CMH2O (±0.5CMH2O)
PRESSURE ACCURACY: + 0.5CMH2O
PARAMETER SETTING:
DELAYED BOOST: 0-60MIN, SET THE DIVISION INTERVAL 5MIN
INITIAL PRESSURE: 4CMH2O TREATMENT PRESSURE / RESPIRATORY PRESSURE SETTING
THERAPEUTIC PRESSURE: 4-20CMH2O (IN CPAP MODE)
TARGET TIDAL VOLUME: 150ML - 1500ML, ON/ OFF
MAXIMUM SUCTION PRESSURE: 4-30CMH2O, (CAN BE SET WHEN THE TARGET TIDAL VOLUME FUNCTION IS ON)
MINIMUM SUCTION PRESSURE: 4-30CMH2O (NOT HIGHER THAN THE SUCTION PRESSURE), (CAN BE SET WHEN THE TARGET TIDAL VOLUME FUNCTION IS ON)
INSPIRATORY PHASE PRESSURE: 4-30CMH2O
EXPIRATORY PRESSURE: 4-30CMH2O
EXPIRATORY DECOMPRESSION: PATIENT, OFF, 1-3, THREE ADJUSTABLE
MANUAL VOLTAGE REGULATION: 0-2 GEAR, 0-2CMH2O (ONLY AVAILABLE IN CPAP MODE)
INSPIRATORY SENSITIVITY: 1-8 STALLS
EXPIRATORY SENSITIVITY: 1-8 STALLS
RESPIRATORY FREQUENCY: 3-40 TIMES / MIN
INSPIRATORY TIME: 0.3-3.0S
BACKUP RATE: ON / OFF, DEFAULT 10
PRESSURE RISE TIME: 1-4 STALLS
HUMIDIFIER: 1-5 ADJUSTABLE IN 5 GEARS
*TITRATION FUNCTION: SUPPORT MANUAL AND AUTOMATIC PRESSURE TITRATION, BUILT-IN REMOTE WIRELESS COMMUNICATION MODULE, COMPLETE THE RANDOM SWITCHING OF SINGLE AND DOUBLE LEVEL MODES IN THE TITRATION PROCESS, AND CONTROL MORE THAN 11 VENTILATOR PARAMETERS AT THE SAME TIME.
AUXILIARY FUNCTION: AUTOMATIC AIR LEAKAGE COMPENSATION, AUTOMATIC STARTUP, AUTOMATIC SHUTDOWN, DELAYED SHUTDOWN, SCREEN BACKLIGHT ADJUSTMENT
MONITORING PARAMETERS: PRESSURE, TIDAL VOLUME, RESPIRATORY RATE, MINUTE VENTILATION VOLUME, AIR LEAKAGE VOLUME, INSPIRATORY TIME, BLOOD OXYGEN SATURATION
WAVY CURVE: PRESSURE TIME WAVEFORM, FLOW RATE TIME WAVEFORM
ALARM PROMPT: PIPELINE AND MASK FALLING OFF, AIR LEAKAGE PROMPT, POWER INTERRUPTION, TREATMENT MACHINE FAILURE, HUMIDIFIER FAILURE, LOW VOLTAGE, HIGH RESPIRATORY RATE, LOW RESPIRATORY RATE, LOW MINUTE VENTILATION VOLUME, LOW BLOOD OXYGEN, REPLACEMENT OF FILTER COTTON, FULL SD CARD, RE INSERTION OF SD CARD
*DATA MANAGEMENT:
NETWORK DATA: BMC + RESPIRATORY HEALTH MANAGEMENT CLOUD PLATFORM
SD CARD DATA: RESART NPAP DATA ANALYSIS SOFTWARE
PARTS:
SD CARD: STANDARD
SD CARD SLOT: STANDARD
PIPING: 9 22MM, 1.8M LONG
FACE SHIELD: F2 NOSE MASK AS STANDARD
NOISE: LESS THAN 30DB
ENVIRONMENT CONDITION:
TEMPERATURE:
(WHEN USED) 5 -35 C
(DURING TRANSPORTATION AND STORAGE) -20 C -55 C
ATMOSPHERIC PRESSURE:
(WHEN USED) 760-1060HPA
(DURING TRANSPORTATION AND STORAGE) 760-1060HPA
WORKING HOURS: MORE THAN 8 HOURS
POWER SUPPLY REQUIREMENTS:
AC VOLTAGE: 100-240V
FREQUENCY: 50HZ/60HZ
INPUT POWER: LESS THAN 2A
WATERPROOF LEVEL: IP22 - DRIP PROOF EQUIPMENT
INSTRUMENT SIZE: 290mm X 180mm X 134mm
WEIGHT: 1.5KG (EXCLUDING HUMIDIFIER) 2.5KG (INCLUDING HUMIDIFIER)
ITEM 001
QUANTITY: 10 SETS-999 SETS
ITEM 002
QUANTITY: 1,000 SETS-9,999SETS
ITEM 003
QUANTITY: ≥10,000 SETS - 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-2779 SEMI-AUTOMATIC FACE MASK EAR STRAP WELDING MACHINE, 20 PIECES PER MINUTE -This machine fastens the ear straps to masks only. For mask production, See J-2778
SEMI-AUTOMATIC BLANK FACE MASK EAR STRAP WELDING MACHINE
ULTRASONICALLY WELDS EAR STRAPS TO FACE MASK BLANKS
MASK DIMENSIONS: 175 x 95mm
CAPACITY: 15 TO 20 PIECES PER MINUTE
POWER: 2 KW
DIMENSIONS: 1200mm L x 750mm W x 1700mm H
WEIGHT: 350 KGWITH AUTOMATIC FEEDING AUTOMATIC CUTTING OF EAR STRAP MATIERAL
MANUAL LOADING & UNLOADING
FLEXIBLE CONFIGURATION, EASY TO OPERATE
VERY EFFICIENT, WITH LOW FAILURE RATEPACKAGE BY WOODEN BOX: 800 X 1250 X 1600mm
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TOTAL WEIGHT IS EXPECTED TO BE AROUND 100KGS - J-2778 SEMI-AUTOMATIC FACE MASK MACHINE FOR MASS 175 x 95mm – 200 PER MINUTE (Air Freight Available)
SEMI-AUTOMATIC FACE MASK MACHINE
PRODUCES BLANK MASKS WITH NO EAR STRAPS (see our J-2779 for ear strap machine)
MASK DIMENSIONS: 175 x 95mm
CAPACITY: 150 TO 200 PIECES PER MINUTE
WEIGHT: 650 KGS
DIMENSIONS (L x W x H): 3400 x 800 x 2020mm
MATERIAL: NONWOVEN/ MELT-BLOWN FABRIC
VOLTAGE: 220 VOLTS / 380 VOLTS
POWER: 6 KWWITH ADJUSTABLE SPEED
CONSISTENT PRODUCT QUALITY
CONVENIENT OPERATION
USES ULTRASONIC WELDING TO FORM MASKSLEAD TIME: 5 DAYS FROM RECEIPT OF PAYMENT
PACKAGE 1 BY WOODEN BOX: 2400 X 1000 X 1300mm
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PACKAGE 2 BY WOODEN BOX: 2150 X 700 X 2300 mm
TOTAL WEIGHT IS EXPECTED TO BE AROUND 650KGS - M-5140 MACHINE TO PRODUCE VARIOUS TYPES OF COTTON PADS- 3 PUNCH AND 810 PADS PER MINUTE
MODEL: 96
DESIGNED FOR PRODUCTION OF VARIOUS TYPES OF COTTON PADS
ALSO CALLED COTTON ROUNDS, COTTON SQUARES, DISC COTTON, FACIAL COTTON
COTTON PADS FOR HYGIENIC USE, COSMETIC USE, INDUSTRIAL USE, AND MEDICAL APPLICATIONS
PRODUCT OUTPUT DEPENDS ON THE SIZE OF THE PADS AND CAN REACH UP TO 1080 PIECES/MINUTE
VARIOUS SHAPES OF COTTON PADS CAN BE PRODUCED AUTOMATICALLY IF SEPARATE TOOLS OF DIFFERENT SHAPES OR SIZES ARE INSTALLED
THE COTTON PAD PRODUCER HAS THE OPTION OF MANUFACTURING EITHER EMBOSSED OR PLAIN COTTON PADS
THE PRODUCT IS PACKAGED IN POLYBAGS IN SEMI AUTOMATIC MODE
THE MACHINE CAN ALSO BE CONNECTED TO THE AUTOMATIC PACKAGING DEVICE TO OBTAIN DIFFERENT KINDS OF PACKAGING
3 PUNCH MOULD
MAXIMUM PERFORMANCE 810 ROUND PADS PER MINUTE
EACH STROKE OF THE PUNCHING UNIT CUTS 4 ROUNDS AT ONE TIMEQUANTITY: 1
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