The Bacterial Filtration Efficiency (BFE) test is performed on filtration materials and devices that are designed to provide protection against biological aerosols, such as face masks, surgical gowns, caps, and air filters. This test is used for FDA 510(k) submissions for surgical masks, is required by ASTM F2100 and EN 14683, and complies with ASTM F2101 and EN14683. Click to view BFE tester Applicable Standards · ASTM F2100 · EN 14683 · ASTM F2101 Study Outline Bacterial Filtration Efficiency (BFE) The Bacterial Filtration Efficiency test determines the filtration efficiency by comparing the bacterial control counts to test article effluent counts. The test is conducted using Staphylococcus aureus as the challenge organism. After the filtration media is preconditioned, a liquid suspension of S. aureus is aerosolized and delivered to the filtration media at a constant flow rate of 28.3 liters per minute (LPM) or 1 cubic foot per minute (CFM). The aerosol droplets are drawn through a six-stage Andersen sampler for collection. The number of bacterial aerosol droplets contacting the filter media is determined by conducting challenge controls without filter medium in the test system. Challenge controls are maintained at 1700 – 3000 colony-forming units (CFU) with a mean particle size (MPS) of 3.0 ± 0.3 µm. This allows filtration efficiencies to be reported up to >99.9%. The BFE test offers a number of advantages over other filtration efficiency tests. It has been used with little or no modification for years and provides a standard reference for comparison of filtration materials. The mean particle size can be tightly controlled and is sized using a six-stage viable-particle Andersen sampler, permitting stage-by-stage analysis. The BFE procedure is reproducible, and provides a more severe challenge to most filtration devices than would be expected in normal use. Large numbers of material can be evaluated in a relatively short time. BFE testing is commonly performed along with the Differential Pressure (Delta P) test. For housed filters, we recommend the Increased Challenge method. This procedure uses a higher concentration of challenge to be delivered to each test material. Filtration efficiency measurements can be determined up to >99.9999%. Increased Challenge Bacterial Filtration Efficiency (BFE) The Increased Bacterial Filtration Efficiency test determines the filtration efficiency by comparing the bacterial control counts to test article effluent counts. The test is conducted using Staphylococcus aureus as the challenge organism. A liquid suspension of S. aureus is aerosolized and delivered to the filtration media at a constant flow rate of 30 liters per minute (LPM). The aerosol droplets are collected in all-glass impingers (AGIs) in parallel. The challenge is delivered for a one-minute interval and sampling through the AGIs is conducted for two minutes to clear the aerosol chamber. The titer of the assay fluid is det...

Gas chromatography is a term used to describe the group of analytical separation techniques used to analyze volatile substances in the gas phase. In gas chromatography, the components of a sample are dissolved in a solvent and vaporized in order to separate the analytes by distributing the sample between two phases: a stationary phase and a mobile phase. The mobile phase is a chemically inert gas that serves to carry the molecules of the analyte through the heated column. Gas chromatography is one of the sole forms of chromatography that does not utilize the mobile phase for interacting with the analyte. The stationary phase is either a solid adsorbant, termed gas-solid chromatography (GSC), or a liquid on an inert support, termed gas-liquid chromatography (GLC). For packaging materials, gas chromatography (GC) is used to analyse solvent residues in printing or adhesive layers. If solvent residue levels are too high, this poses a risk, as it could lead to undesirable odours or poor laminate adhesion. That is why we measure each production stage multiple times. A gas chromatograph (GC) is an analytical instrument that measures the content of various components in a sample. The analysis performed by a gas chromatograph is called gas chromatography. Principle of gas chromatography: The sample solution injected into the instrument enters a gas stream which transports the sample into a separation tube known as the "column." (Helium or nitrogen is used as the so-called carrier gas.) The various components are separated inside the column. The detector measures the quantity of the components that exit the column. To measure a sample with an unknown concentration, a standard sample with known concentration is injected into the instrument. The standard sample peak retention time (appearance time) and area are compared to the test sample to calculate the concentration. GBPI Design and Manufacture new GC Gas Chromatography GC9803 on 9th April 2019,its updating function as below,more details please feel free to contact us Standard PC side counter control software, built-in chromatographic workstation, PC side counter control and the host touch screen synchronous two-way control. The main machine adopts 7-inch color touch screen, which displays the flow value and pressure value of the air circuit electronically. Multi-core, 32-bit embedded hardware system ensures the reliable operation of the instrument. One-click start function. It has perfect system self-check function and automatic fault identification function. Quick opening after cooling system, from 250 ° to 50 ° cooling less than 10 minutes Memory function of 20 groups of samples was tested. RS232 communication port, LAM network port FID automatic ignition, no need for igniter

How to produce the aseptic bags? The production environment of aseptic bags needs to be performed in a clean room above level C. Aseptic bag production process is mainly divided into blown film, cutting, heat sealing bag, vacuum packaging, sterilization and so on. Blown film: Must first open the air purification system in the workshop, disinfect and sterilize the workshop and operating personnel, and then blow the membrane through the purified polyethylene particles at a certain temperature; Cutting: The tubular film obtained after blown film is cut into different size film barrels according to the customer’s requirements; Heat sealed bag: Sealing the film cylinder with a heat sealer; Vacuum packaging: The aseptic packaging bag after sealing is vacuum packed according to a certain amount; Because it is very easy to be polluted during the transportation. Sterilization: The packaged aseptic bags are gamma sterilized to achieve the sterility requirements of the product. Compared with ordinary food packaging bags, the essence of aseptic packaging bags is still a plastic bag, and its material and production process are not much different. However, aseptic bags must be carried out in a clean room, through a complex sterilization process to achieve the strict requirements of aseptic packaging. It is a specialized manufacturing process in which food, pharmaceutical, or other contents are sterilized separately from packaging. The contents are then inserted into the pouches in a sterile environment How to test your aseptic bags water vapor transmission rate WVTR? GBPI W501 Water Vapor Permeability Tester can greatly help you testing your aseptic bags WVTR,below introduce some technical details about our WVTR Tester W501 Application W501 Water Vapor Permeability Analyzer test the water vapor transmission rate of various materials, including: plastic film, composite film, aluminum-plated film, aluminum foil etc.; sheets, such as PP sheet, PVC sheet, rubber, building material, porcelain; other application, such as solar panel, paint film, medical patch etc. It is widely used in packaging, plastic film, food, pharmaceuticals, personal care industries, inspection agency, research institute, college and so on. Working Principle Gravimetric method. Fix the test sample in the middle of test chamber to separate the chamber into upper room and lower room; humid gas flows in upper room, and place desiccant device in lower room; as in lower room it remains dry (0-8%RH) by desiccant, water molecules penetrate through the sample from upper room into lower room, absorbed by desiccant; then the cup weight will increase; system weigh the increasing cup weight so as to calculate the water vapor transmission rate. Testing Standard: GB 1037, GB/T 16928, YBB00092003, ASTM E96, ASTM D1653, ISO 2528, TAPPI T464, DIN 53122-1, JIS Z0208

In the food packaging industry, using a material composition that extends shelf life is a key component to ensuring the safety of the product and preserving the taste of the food. In addition, using packaging material that prolongs a products shelf life can drastically cut down on waste of perishable products, and creates a longer window for grocery stores to stock product before it reaches the hands of the consumer. A great way to achieve this is by using a packaging material that reduces the amount of oxygen that permeates the plastic, such as EVOH. So what is EVOH film and how does it contribute to increasing the shelf life of packaged food products? EVOH stands for Ethylene-vinyl alcohol copolymer and is a flexible, crystal clear, glossy thermoplastic copolymer. This material has excellent flex-crack resistance, and exhibits a high resistance to hydrocarbons, oils and organic solvents. EVOH is known for having some of the best barrier resistance to gases such as oxygen, nitrogen, and carbon dioxide which makes it particularly suited for packaging food, drugs, cosmetics, and other perishable products. When compared to other common films, EVOH is considered to have superior barrier properties. You might be thinking so how to test EVOH oxygen transmission rate.GBPI Oxygen Permeability Analyzer Y110 help you find out the answer.This oxygen permeation tester is our GBPI design for EVOH Barrier film oxygen transmission rate testing,popular for our EVOH Barrier material customers. Advanced technology Temperature control: International advanced electromagnetic technology, program controlled, auto heating and cooling; and no need of external accessories. Precision: 0.1℃. Humidity control: Dual gas flow method(dry gas and humid gas), with broad range, high precision (1%RH) and stable flow. Carrying cutting-edge ARM controlling system, can run independently without computer.

产品的质量和完整性很重要。高水分阻隔薄膜是最有效的保护方式，同时仍能吸引各种商品。 高阻隔膜是一种优质产品，具有以下特点： 防潮膜-这种包装非常适合防潮。防潮膜可以用多层专用膜定制，以防止水分损害您的产品。确保食品和其他粉状物品保持干燥，并具有高阻隔薄膜的防潮保护功能。 隔氧膜–膜的气密安全性通过特殊的涂层设计来防止氧气透过，从而保护您的产品免于透过氧气。隔氧膜旨在保持您产品的风味，气味和颜色。 因此，如何确认您的阻隔膜是高性能的。凭借超过16年的包装测试设备经验，我们的专家团队随时可以帮助您找到满足您需求的完美的高防潮包装。低于GBPI 水蒸气渗透率测试仪W403和氧渗透率测试仪 Y310可以极大地帮助您测量阻隔膜的水蒸气和氧气透过率。