Unite as One: Shandong Textile Research Institute Fully Ensures the Testing Quality of Medical Protective Articles for COVID-19 Prevention
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Based on its scientific research advantages, Shandong Textile Research Institute has fully ensured the testing quality of medical protective articles related to COVID-19 prevention. The LFY-228 Medical Protective Clothing Synthetic Blood Penetration Tester developed by our institute has been used for the benchmark evaluation and inspection of anti-epidemic products (unregistered domestic medical emergency products such as medical masks and protective clothing) under the emergency call of the COVID-19 Prevention and Control Leading Group of Hubei Provincial Medical Products Administration. According to relevant media reports, at 10 p.m. on January 27, Hubei Institute for Medical Device Supervision and Inspection received the inspection task of 6 batches of medical protective clothing. The technical personnel worked round the clock and completed all inspection tasks within 24 hours, half a working day ahead of the scheduled time.
During the Spring Festival holiday and the delayed resumption of work, facing the severe epidemic prevention and control situation, many medical device inspection institutions, institute for drug control and related manufacturers of medical protective articles across the country successively consulted the Instrument Research Office of Shandong Textile Research Institute on issues related to testing instruments for medical protective articles. To win the battle against the epidemic and provide a solid guarantee for the quality testing of medical protective articles such as masks and protective clothing used by medical staff on the front line, the staff of the Instrument Research Office gave up their holidays and provided detailed explanations of product functional parameters and technical support to relevant units through all possible means including the internet, telephone and self-media. At the same time, we are fully prepared for production, striving to increase the production capacity of performance testing instruments for medical protective products to support the fight against COVID-19.
To improve work efficiency, we now provide a relevant product catalog and disclose detailed information such as technical parameters, applicable standards and working principles of some core products for easy access by relevant institutions. Meanwhile, you are welcome to call us at: 135 1532 6790, and we will wholeheartedly provide you with technical support!
Technical Information of Some Core Products:
LFY-706 Particulate Protection Effect and Filtration Efficiency Tester (for Masks)
Main Application
It is used to test the particulate protection effect and filtration efficiency of daily protective masks and respirators. It is applicable to medical device inspection centers, safety protection inspection centers, labor protection inspection centers, drug inspection centers, centers for disease control and prevention, textile testing centers, hospitals, manufacturers of masks and respirators, etc.
Technical Parameters
1. Adopts a cold aerosol generator to produce continuous and stable aerosol particles, with convenient solution filling.
2. Adopts a high-precision PM2.5 sensor to measure aerosol concentration.
3. Full-process particulate anti-leakage design to protect the safety of laboratory personnel.
4. Compatible with the testing of particulate protection effect and filtration efficiency for mask and respirator samples.
5. 2 sets of aerosol generators: salt particulate aerosol generator and oil particulate aerosol generator.
6. Equipped with an aerosol particulate static charge neutralizer.
7. Pneumatic fixture with protective device, safe and convenient to use.
8. Equipped with a temperature and humidity sensor to display ambient temperature and humidity in real time (Temperature and humidity requirements: 25℃±5℃, 30%RH±10%RH).
9. Equipped with a glass rotameter, a vacuum pump and a laser particle counter.
10. Filtration efficiency detection range: 0-99.999%.
11. Filtration efficiency detection flowmeter range: (10-100) L/min, accuracy class 2.5.
12. Filtration efficiency sampling frequency: 1-9999 times/min, adjustable at will.
13. Filtration efficiency particulate concentration: (20-30) mg/m3; Count median diameter: salt particles (0.075±0.02) μm, oil particles (0.185±0.02) μm; Particle size distribution geometric standard deviation: salt particles ≤1.86, oil particles ≤1.60; Dynamic detection range: (0.001-100) mg/m3, accuracy 1%.
14. Front open-door design of the protection effect test chamber with good airtightness, equipped with operating gloves for convenient replacement of masks to be tested.
15. Standard head mold adopted for protection effect testing: 1 standard head mold to simulate the real situation of human wearing protective masks.
16. Protection effect aerosol particles: test chamber concentration range (20-30) mg/m3, adjustable and settable, concentration fluctuation less than ±10%; Aerosol generator produces particle size distribution of 0.02-2μm, mass median diameter: salt particles 0.6μm, oil particles 0.3μm.
17. Protection effect aerosol concentration detection device: gas sampling flow rate (1-2) L/min, sampling frequency: 20 times/min (1-9999 times/min, adjustable at will), dynamic detection (0.001-100) mg/m3, accuracy 1%.
18. The protection effect inhaled gas sampling tube is located at the lower right of the nostril (inside the oral cavity).
19. A breathing simulator is adopted for protection effect testing to simulate the human breathing state.
20. Breathing simulator: sinusoidal air flow, frequency 20 times/min, breathing flow control (30±1) L/min, respirator flow range: 0-40 L/min.
21. Instrument accuracy class: Class 1.
22. Control system: computer controls the test process, automatically collects data, equipped with a dedicated computer and testing software.
23. Computer automatic testing and display: medium concentration in the test chamber, inhaled gas medium concentration, background concentration; Automatic calculation: filtration efficiency, protection effect; Test data can be saved, output, inquired and printed.
24. Power supply: AC220V, 50Hz.
Applicable Standards (Different accessories are required for different standards)
GB/T 32610-2016 Technical Specification for Daily Protective Masks 6.13 (Appendix A), 6.14 (Appendix B)
GB 2626-2006 Respiratory Protective Devices - Self-priming Filtering Type Anti-particulate Respirators
GB 19082-2009 Technical Requirements for Disposable Medical Protective Clothing
GB 19083-2010 Technical Requirements for Medical Protective Masks
YY 0469-2011 Medical Surgical Masks
LFY-718 Protective Clothing Antiviral Penetration Tester
Main Application
The Protective Clothing Antiviral Penetration Tester is suitable for testing the resistance of protective clothing materials to the penetration of blood-borne pathogens and the liquid penetration resistance of protective materials.
Working Principle
Determine the viral penetration capacity with a suspension containing surrogate microorganisms under a certain hydrostatic pressure.
Technical Parameters
1. The instrument adopts an air source that can provide a pressure of (20-22) kPa for continuous pressurization of the test sample, without being limited by the space of the test site.
2. The instrument is equipped with a pressure gauge to display the pressurization pressure, and the pressurization pressure is adjustable.
3. Pressurization medium: compressed air.
4. A specially made stainless steel penetration test tank ensures firm clamping of the test sample and prevents the test liquid from splashing around.
5. Transparent cover material: corrosion resistant.
6. Square metal barrier net: open area ≥50%; deformation ≤5mm.
7. Pressurization time is settable, with a digital display timer and an accuracy of ±1 second.
8. The instrument is equipped with a clamp that can generate a torque of 13.6N·m.
9. The structure of the instrument is consistent with the "Schematic Diagram of Test Instrument" and "Structure of Test Tank" specified in the standards.
10. Pressure points: 1.75 kPa; 3.5 kPa; 7 kPa; 14 kPa; 20 kPa
11. To be prepared by the user: culture medium, control substance, phage suspension, settling plate.
12. To be prepared by the user: thickness gauge, incubator, water bath, balance, vortex mixer, refrigerator, sterilizer, oscillator, pH meter, inoculation loop, spectrophotometer, centrifuge, pipette, test tube, glass bottle.
13. Power supply: AC220V, 50Hz, 100W
Applicable Standards (Different accessories are required for different standards)
YY/T 0689-2008 Blood and Body Fluid Protection Equipment - Test Method for Resistance of Protective Clothing Materials to Penetration by Blood-borne Pathogens - Phi-X174 Phage Test Method
YY/T 0699-2008 Liquid Chemical Protection Equipment - Test Method for Resistance of Protective Clothing Materials to Penetration by Pressurized Liquids
LFY-227 Medical Mask Synthetic Blood Penetration Tester
Main Application
It is used to determine the resistance of medical protective masks to synthetic blood penetration under different test pressures, and can also be used to determine the blood penetration resistance of other coated materials.
Instrument Features
1. Protruding sample fixing device, which can simulate the actual use state of masks, reserve the test target area without damaging the sample, and distribute synthetic blood on the target area of the sample.
2. Special constant pressure injection device, which can inject a certain volume of synthetic blood within a controlled time.
3. Can fully simulate the injection speeds corresponding to the average human blood pressure of 10.6kPa, 16kPa and 21.3kPa for testing.
4. Equipped with a fixed target plate, which can block the high-pressure edge part of the injected liquid flow and only allow the steady flow part to be injected onto the sample, improving the accuracy and repeatability of the liquid velocity injected onto the sample.
Technical Parameters
1. Injection distance: 300mm～305mm, adjustable
2. Nozzle diameter: 0.84mm
3. Injection speed: 450cm/s, 550cm/s, 635cm/s
Applicable Standards
GB 19083-2010 Technical Requirements for Medical Protective Masks, 5.5 Synthetic Blood Penetration and Barrier Performance
YY/T 0691-2008 Infection Pathogen Protection Equipment - Test Method for Resistance of Medical Face Masks to Synthetic Blood Penetration (Fixed Volume, Horizontal Projection)
YY 0469-2011 Technical Requirements for Medical Surgical Masks - Blood Penetration Test Device
ISO 22609:2004 Infection Pathogen Protection Equipment - Test Method for Resistance of Medical Face Masks to Synthetic Blood Penetration (Fixed Volume, Horizontal Projection)
ASTM F1862-07 Standard Test Method for Resistance of Medical Face Masks to Penetration by Synthetic Blood (Horizontal Projection of Fixed Volume at a Known Velocity)
Attached is the catalog of some medical protection performance testing instruments of our institute:
