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Henan Tongwei Medical Equipment Co., LtdCall us : +86 − −19139704654 // Email us : [email protected]
Henan Tongwei Medical Equipment Co., LtdCall us : +86 − −19139704654 // Email us : [email protected]
2 Melt blown extrusion is a manufacturing process that is used for creating a type of fabric called non-woven fabric which is made from polymers such as polypropylene Traditional fabrics made of natural materials like cotton are woven together meaning that the material is first formed into a yarn and then interlaced using a weaving or knitting
Continuous production and properties of mutil PAN nanofibers were sprayed directly on the melt-blown filter by blow spinning The composite filters have more stable filtration performance and higher efficiency when intercepting particles with a diameter below 100 nm than melt-blown filters
Aug 20 2020In this work three linear isotactic polypropylenes with different weight-average molecular weights M w and comparable polydispersities were used to produce nonwovens by melt blowing technology at two different temperatures T The air/polymer flow rate was changed to maintain the same average fiber diameter resulting in a different broadness of fiber diameter distribution which was
The preparation of melt-blown filtration materials was studied in this paper The effects of collection distance screw speed air temperature on web structure and properties were discussed and moreover fiber diameter thickness surface density pore size air permeability and breaking force of PP nonwoven fabrics were characterized in this paper
Lee Y Wadsworth LC (1990) Structure and filtration properties of melt blown polypropylene webs Polym Eng Sci 30: 1413-1419 Wente VA (1956) Superfine Thermoplastic Fibers Ind Eng Chem 48: 1342-1346 Ellison CJ Phatak A Giles DW Macosko CW Bates FS (2007) Melt blown nanofibers: Fiber diameter distributions and onset of fiber breakup
Sep 27 2019Lee and L C Wadsworth " Structure and filtration properties of melt blown polypropylene webs " Polym Eng Straeffer and B C Goswami " Mechanical and structural properties of melt-blown fibers " in Principles of Nonwovens edited by J E
Nov 07 2016Recently the usage of melt blown products in many areas has increased In melt blown process generally polymers have been used There are a variety of polymers Characteristics of melt blown nonwovens have changed significantly depending on the polymer type Also there are several parameters such as die temperature die-to-collector distance (DCD) air pressure etc that modify the
Study on filtration performance and mechanism of melt-blown polypropylene electret web used as air filter material against challenge aerosols with different chemical properties XIAO Hui-ming XIE Wen-hu CHEN Gang-jin(Laboratory of Electret and its Application Hangzhou Dianzi
Nov 07 2016Recently the usage of melt blown products in many areas has increased In melt blown process generally polymers have been used There are a variety of polymers Characteristics of melt blown nonwovens have changed significantly depending on the polymer type Also there are several parameters such as die temperature die-to-collector distance (DCD) air pressure etc that modify the
Melt blowing is a conventional fabrication method of micro- and nanofibers where a polymer melt is extruded through small nozzles surrounded by high speed blowing gas The randomly deposited fibers form a nonwoven sheet product applicable for filtration sorbents apparels and drug delivery systems The substantial benefits of melt blowing are simplicity high specific productivity [jargon
Structure and Filtration Properties of Melt Blown Polypropylene Webs YOUNGCHUL LEE* and LARRY C WADSWORTH Textile Materials Research Laboratory Centerfor Materials Processing f Tennessee University o Knoxville Tennessee 37996 Polypropylene melt blown webs have been studied in terms of the relationships among the processing conditions structure and filtration efficiency
Apr 22 2020Most of the traditional filter materials are ordinary melt-blown non-woven fabrics etc which has a poor filtering effect and cannot effectively filter the tiny particles and bacteria in the air after research the electret process is used that is: adding electret materials And the non-woven polypropylene non-woven fabric with high electret treatment has high filtration efficiency
Melt-blown non-woven fabric with PP polypropylene as the main material fiber diameter can reach 1 ~ 5 microns its unique capillary structure of ultra-fine fibers increase the number and surface area of fibers per unit area so that the melt-blown fabric has a good filtration Shielding thermal insulation and oil
The melt-blown nonwoven fabric is known as the heart of the mask disperses molten plastic through high-speed hot air and spins the polymer melt through the spinneret of the ultra-fine nozzle making it a high-performance polypropylene melt-blown filter material Fibers are extremely thinner than other materials Introduction
Oct 12 2020Melt blown extrusion is a manufacturing process that is used for creating a type of fabric called non-woven fabric which is made from polymers such as polypropylene Traditional fabrics made of natural materials like cotton are woven together meaning that the material is first formed into a yarn and then interlaced using a weaving or knitting
‡ Cummins Filtration 1200 Fleetguard Road Cookeville Tennessee 38502 Fluorine-Enriched Melt-Blown Fibers from Polymer Blends of Poly(butylene terephthalate) and a Fluorinated Multiblock Copolyester Tuning Surface Properties of Poly(butylene terephthalate) Melt Blown Fibers by Alkaline Hydrolysis and Fluorination
The melt blown cartridge filters are sturdy with a fixed pore structure The process fluids travel through the medium in a straight path and may encounter up to eight impingements on the way The cartridge filters are widely is used in applications involving water filtration RO pre filtration Oils Filtration of slightly corrosive liquids compatible solvents and gasses
Sep 27 2019Lee and L C Wadsworth " Structure and filtration properties of melt blown polypropylene webs " Polym Eng Straeffer and B C Goswami " Mechanical and structural properties of melt-blown fibers " in Principles of Nonwovens edited by J E
Furthermore the introduction of MgSt changed the crystal structure of the melt blown nonwovens thus improving the electret properties to achieve a high filtration efficiency of 99 22% a low pressure drop of 92 Pa and a satisfactory QF of 0 054 Pa −1 In particular the electret filtration materials exhibited excellent filtration stability
The key in all the masks is the melt-blown fabric filtration layer Due to the dense structure of the fabric it helps ensure that the smallest particles are filtered out at high efficiency It's because of these characteristics that the fabric is crucial for filtering viruses and any other pathogens
Melt blown fabric acts as a medium between the two layers of spun bonded material and is the most important component of the mask The melt blown intermediary fabric generally has smaller diameter filaments and superior filtration properties This melt blown fabric has high efficiency and a higher capacity for holding dust
The structure characteristic and filtration mechanism of melt-blown filtration materials were introduced The influence of melt-blown filtration material with electrets treatment on the filtration efficiency was studied The electrets treatment could enhance filtration efficiency of the material greatly and almost remain absorption resistance stable the filtration efficiency of the material
Typical melt blown webs will have fibers in the range of 2-5 microns on the average with a wide distribution in diameter Because of the type of the polymer used and the process the fibers are not necessarily strong but the fabrics have good barrier properties and serve as ideal materials for filter
Physical properties namely thickness basis weight tensile properties air permeability and fibre diameter of were measured and effect of various production parameters on the physical properties of PP meltblown nonwovens were investigated and possibility fo r using such materials in air filtration
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