Abstract A "nonwoven" refers to a sheet or a mat of fibers connected together by physical entanglements, or contact adhesion between individual fibers, without any knitting or stitching. The nonwoven industry has been expected to grow further due to new applications requiring fibers of much smaller ...
Abstract A "nonwoven" refers to a sheet or a mat of fibers connected together by physical entanglements, or contact adhesion between individual fibers, without any knitting or stitching. The nonwoven industry has been expected to grow further due to new applications requiring fibers of much smaller sizes. Electro -spinning, melt blown spinning, melt spinning processes are the most commonly used technologies for nonwovens consisting of small size fibers. Especially, melt blowing process is known for its single step process of extruding a polymer melt through an orifice die and drawing down the extrudate with jet of hot air. In general, melt blowing nonwovens are composed of fibers with average diameter of 1~6㎛. Therefore, melt blown nonwovens are popularly used in the range of applications including filtration, membrane separation, wound dressing, and scaffolds for tissue engineering. In this paper, we examined the effects of different concentrations of aliphatic-aromatic copolyester(PBAT) on the mechanical and filtration properties of PLA melt blown nonwoven. PLA(poly lactic acid) is a biodegradable linear thermoplastic polyester derived from 100% renewable sources such as corn, and the polymer is compostable. It is an aliphatic polyester made up of lactic acid(2-hydroxy propionic acid)building block. PLA is used broadly in packaging and fiber application. It has a number of characteristics that are similar to many other thermoplastic polymer, such as controlled mechanical properties, smooth surface and low moisture regain. But it has many disadvantages such as poor heat resistance, flexibility, alkali resistance, and so on. To improve this disadvantages of PLA, it has been blended with aliphatic-aromatic copolyester. It is biodegradable, based on the monomers 1,4-butanediol, adipic acid and terephthalic acid for improving PLA properties. The aliphatic fraction provides biodegradability, while the aromatic fraction offers useful performance properties. The addition of the copolyester is known for overcoming the disadvantages of PLA such as flexibility, elongation, and impact toughness. The results demonstrated that the mechanical properties of PLA nonwoven were greatly improved with increasing amount of aliphatic-aromatic copolyester. In Addition, filtration properties were affected by amount of copolyester. It was shown that the dust holding efficiency of PLA melt blown nonwoven has been improved while the pressure drop increased along with the concentration of aliphatic-aromatic copolyester.
Abstract A "nonwoven" refers to a sheet or a mat of fibers connected together by physical entanglements, or contact adhesion between individual fibers, without any knitting or stitching. The nonwoven industry has been expected to grow further due to new applications requiring fibers of much smaller sizes. Electro -spinning, melt blown spinning, melt spinning processes are the most commonly used technologies for nonwovens consisting of small size fibers. Especially, melt blowing process is known for its single step process of extruding a polymer melt through an orifice die and drawing down the extrudate with jet of hot air. In general, melt blowing nonwovens are composed of fibers with average diameter of 1~6㎛. Therefore, melt blown nonwovens are popularly used in the range of applications including filtration, membrane separation, wound dressing, and scaffolds for tissue engineering. In this paper, we examined the effects of different concentrations of aliphatic-aromatic copolyester(PBAT) on the mechanical and filtration properties of PLA melt blown nonwoven. PLA(poly lactic acid) is a biodegradable linear thermoplastic polyester derived from 100% renewable sources such as corn, and the polymer is compostable. It is an aliphatic polyester made up of lactic acid(2-hydroxy propionic acid)building block. PLA is used broadly in packaging and fiber application. It has a number of characteristics that are similar to many other thermoplastic polymer, such as controlled mechanical properties, smooth surface and low moisture regain. But it has many disadvantages such as poor heat resistance, flexibility, alkali resistance, and so on. To improve this disadvantages of PLA, it has been blended with aliphatic-aromatic copolyester. It is biodegradable, based on the monomers 1,4-butanediol, adipic acid and terephthalic acid for improving PLA properties. The aliphatic fraction provides biodegradability, while the aromatic fraction offers useful performance properties. The addition of the copolyester is known for overcoming the disadvantages of PLA such as flexibility, elongation, and impact toughness. The results demonstrated that the mechanical properties of PLA nonwoven were greatly improved with increasing amount of aliphatic-aromatic copolyester. In Addition, filtration properties were affected by amount of copolyester. It was shown that the dust holding efficiency of PLA melt blown nonwoven has been improved while the pressure drop increased along with the concentration of aliphatic-aromatic copolyester.
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