Based on its own scientific research advantages, Shandong Textile Science Research Institute is fully committed to ensuring the quality of medical protection products related to the fight against the new coronavirus. The LFY-228 medical protective clothing synthetic blood penetration performance tester developed by our hospital was used in the emergency call prevention and control products (medical masks, protective clothing, etc. Domestically registered medical emergency products) are in the process of benchmarking evaluation and inspection. According to relevant media reports, at 10 pm on January 27th, the Hubei Provincial Institute of Medical Device Supervision and Inspection received 6 batches of medical protective clothing inspection tasks. Technicians worked day and night to complete all inspection tasks within 24 hours, earlier than expected. It took half a working day.
During the Spring Festival holiday and delayed resumption of work, in the face of a severe epidemic prevention and control situation, many medical device testing institutions, drug inspection institutes and related medical protective equipment manufacturers across the country have successively found the Instrument Research Office of the Shandong Textile Science Research Institute for medical protection Issues related to supplies testing equipment. In order to win the fight against the epidemic and provide a solid guarantee for the quality testing of masks, protective clothing and other medical protective equipment used by medical personnel who are fighting on the front line, the staff in the instrument research room give up all the possibilities of the Internet, telephone, and self-media during the vacation. Provide detailed explanations of product function parameters and technical support for relevant units. At the same time, we are making every effort to increase the production capacity of medical protective product performance testing instruments to help fight the new coronavirus campaign.
In order to improve work efficiency, we now provide related product catalogs, and disclose some core product technical parameters, applicable standards, working principles and other detailed information for easy access by related organizations. At the same time, please call: 135 1532 6790, and we will provide you with technical support!
Part of the core product technical information:
LFY-706 particle protection effect and filtration efficiency tester (mask)
The main purpose
It is used to test the protective effect and filtration efficiency of daily protective masks and respirators against particulates. Applicable to medical device inspection centers, safety protection inspection centers, labor protection inspection centers, drug inspection centers, disease prevention and control centers, textile inspection centers, hospitals, masks and respirator manufacturers, etc.
Technical index
1. The cold-generating aerosol generator is used to produce continuous and stable aerosol particles, which is convenient for filling the solution.
2. The high-precision PM2.5 sensor is used to measure the aerosol concentration.
3. The particle leakage prevention design in the whole process protects the safety of experiment personnel.
4. Compatible with masks and respirators to test particle protection and filtration efficiency.
5. Two sets of aerosol generators: salt particulate aerosol generator and oil particulate aerosol generator.
6. Equipped with aerosol particles electrostatic charge neutralization device.
7. Pneumatic clamps are equipped with protection devices, which are safe and convenient to use.
8. Equipped with temperature and humidity sensors, real-time display of ambient temperature and humidity (temperature and humidity requirements: 25℃±5℃, 30%RH±10%RH).
9. Equipped with glass rotor flowmeter, vacuum pump, laser dust particle counter.
10. Detection range of filtration efficiency: 0-99.999%.
11. Filter efficiency detection flow meter range (10-100) L/min, precision 2.5.
12. Filtering efficiency sampling frequency: 1-9999 times/min can be set arbitrarily.
13. Filtration efficiency, particle concentration: (20-30) mg/m3; counting median diameter: salt particles (0.075±0.02) μm, oil particles (0.185±0.02) μm; geometric standard deviation of particle size distribution: salt particles ≤1.86, Oil particles ≤1.60; dynamic detection range (0.001-100) mg/m3, accuracy 1%.
14. The front door of the protective effect test chamber is designed with good airtightness and equipped with operating gloves to facilitate the replacement of the mask to be tested.
15. The protective effect test uses a standard head model: 1 standard head model, imitating the real situation of people wearing protective masks.
16. Protective effect Aerosol particles: The concentration range of the test chamber (20-30) mg/m3, adjustable settings, the concentration fluctuation is less than ±10%; the aerosol generator produces a particle size distribution of 0.02-2μm, and the mass median diameter: salt The particles are 0.6μm and the oil particles are 0.3μm.
17. Protection effect aerosol concentration detection device: gas sampling flow (1-2) L/min, sampling frequency: 20 times/min (1-9999 times/min can be set arbitrarily), dynamic detection (0.001-100) mg/ m3, accuracy 1%.
18. Protective effect The inhalation gas sampling tube is directly under the nostril (in the mouth).
19. The protective effect adopts a breathing simulator to simulate the human breathing state.
20. Breathing simulator: sinusoidal air flow, frequency 20 times/min, breathing flow control (30±1) L/min, flow range of respirator: 0-40 L/min.
21. Instrument accuracy level (precision level): Level 1
22. Control system: The computer controls the test process, automatically collects data, and is equipped with a dedicated computer and test software.
23. Computer automatic test and display: test chamber medium concentration, 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 (for different standards, different accessories are required)
GB/T 32610-2016 Technical Specifications for Daily Protective Masks 6.13 (Appendix A), 6.14 (Appendix B)
GB 2626-2006 Respiratory protection products-self-priming filter anti-particulate respirator
GB 19082-2009 Technical requirements for medical disposable protective clothing
GB 19083-2010 Technical requirements for medical protective masks
YY 0469-2011 Medical surgical mask
LFY-718 Protective clothing anti-virus penetration tester
The main purpose
The protective clothing anti-virus penetration tester is suitable for testing the penetration ability of protective clothing materials against blood-borne pathogens and the ability of protective materials to resist liquid penetration.
Working principle
A suspension containing substitute microorganisms was used to measure the virus penetration ability under a certain hydrostatic pressure.
Technical index
1. The instrument uses an air source that can provide (20-22) kPa air pressure to continuously pressurize the sample without being restricted by the space of the test site.
2. The instrument has a pressure gauge to display the pressure, which is adjustable.
3. Use pressurized medium: compressed air.
4. The special stainless steel penetrating test tank ensures that the sample is firmly clamped and prevents the test liquid from splashing around.
5. Transparent cover material: corrosion resistance.
6. Square metal blocking net: open space ≥50%; deformation ≤5mm.
7. Pressurization time can be set, digital display timer, accuracy ±1 second.
8. The instrument has a clamp that can produce 13.6N·m torque.
9. The structure of the instrument is the same as the "Schematic diagram of the test instrument" and "The structure of the test tank" in the standard.
10. Pressure point: 1.75 kPa; 3.5kPa; 7kPa; 14kPa; 20kPa
11. Prepared by the user: culture medium, control, phage suspension, sedimentation plate.
12. User-supplied: Thickness gauge, incubator, water bath, balance, vortex gas mixture, refrigerator, sterilizer, oscillator, PH meter, inoculation loop, spectrophotometer, centrifuge, pipette, test tube, Glass bottle.
13. Power supply: AC220V, 50Hz, 100W
Applicable standards (for different standards, different accessories are required)
YY/T 0689-2008 Blood and body fluid protective equipment, protective clothing material resistance to blood-borne pathogen penetration test Phi-X174 bacteriophage test method
YY/T 0699-2008 Liquid chemical protective equipment and protective clothing materials anti-pressurized liquid penetration performance test method
LFY-227 Synthetic Blood Penetration Tester for Medical Masks
The main purpose
It is used to determine the resistance of medical protective masks to penetration of synthetic blood under different test pressures, and can also be used to determine the blood penetration resistance of other coating materials.
Instrument characteristics
1. The protruding sample fixing device can simulate the actual use state of the mask, leaving the test target area without destroying the sample, and distributing the synthetic blood in the target area of the sample.
2. A special constant pressure spray device can spray a certain volume of synthetic blood within a controlled time.
3. It can fully simulate the injection speed corresponding to the average human blood pressure 10.6kPa, 16kPa, and 21.3kPa for testing.
4. It is equipped with a fixed target plate, which can block the high-pressure edge part of the sprayed liquid flow, and only the steady-state flow part is sprayed on the sample, which increases the accuracy and repeatability of the liquid velocity sprayed on the sample.
Technical index
1. Spraying distance: 300mm～305mm adjustable
2. The nozzle diameter: 0.84mm
3. Jet speed: 450cm/s, 550cm/s, 635cm/s
Applicable standards
GB 19083-2010 Technical requirements for medical protective masks, 5.5 synthetic blood penetration barrier performance
YY/T 0691-2008 Protective equipment for infectious pathogens Test method for resistance to penetration of synthetic blood of medical masks (fixed volume, horizontal spray)
YY 0469-2011 Technical requirements for medical surgical masks Blood penetration test device
ISO 22609:2004 Protective equipment for infectious pathogens-Test method for resistance to penetration of synthetic blood by medical masks (fixed volume, horizontal jet)
ASTM F1862-07 Standard Test Method for Resistance of Medical Face Masks to Penetration by Synthetic Blood (Horizontal Projection of Fixed Volume at a Know Velocity)
Attached is the catalog of some medical protective performance test instruments in our hospital:
https://mp.weixin.qq.com/s/j-23kpDmrxkhidQ07VGj5Q
