Sorbent material for removal of the oil pollution
Features sorbent material for removal of the oil pollution. The material includes two layers, one of which is made of pre-bonded hypoproteinemia polypropylene fibers. Both layers are bonded together by hypoproteinemia. When this layer of polypropylene fibers is made thicker than the layer of hollow siliconized polyester fiber. The technical result is an increase in buoyancy of the material while maintaining its high absorption and retention capacity. 1 Il. The invention relates to materials for liquidation of emergency floods of oil and mineral oil on the surface of the water and the land. Such materials are preferred for cleaning and removal of oily liquids, when not effectively end the use of heavy equipment or in combination with last for purification of surfaces. The materials can be used as a preventative means to potentially dangerous objects (tank farms, enterprises, enterprises, air and Maritime transport, pipelines and any businesses associated with the use of oily liquids).Known soubirou, Ostoji of cellulose fibers, enclosed in a net, to absorb oil stains from the surface of the water.Famous U.S. patent 4006079 on CL 210-39, publ. February 2, 1977, protecting materials from glass fibers, enclosed in a net, for absorbing ability.With good sorption properties of these materials have low strength and lack buoyancy.Known absorptive non-woven material, as described in the application EPO 0287264 in class. D 04 H 1/46, publ. 88.10.19. According to this application proposed a material consisting of two layers of short cotton fibers and an intermediate non-woven fabric of synthetic fibers between the layers.The intermediate non-woven material is a material obtained from a melt of the polymer. All three layers are connected by hypoproteinemia.To impart water-repellent properties provides processing Mata special chemicals.The disadvantage of this material is the use of short fibers that can be separated during operation of the Mat, contaminating the collected liquid, and the need for special treatment for imparting water-repellent properties.The closest analogue in the e RF 2139959 on CL IPC6D 04 H 1/46, publ. 20.10.99.Known material has a high sorption and retention ability in combination with the buoyancy. However, when collecting thin film of oil from water surfaces there is a great saturation of the material with water and its partial immersion in the surface layer.The objective of the invention is to increase the buoyancy of the material while maintaining its high absorption and retention capacity.The solution of this problem is due to the fact that in the sorbent material for removal of the oil pollution, including two connected to each other by hypoproteinemia fibrous layer of synthetic staple fibres, one of which is made of polypropylene fibers and is made thicker than the other layer, the layer of lower density are made of hollow siliconized polyester fiber.The invention is illustrated a schematic depiction of the cross-section of the material presented on the drawing.As shown in the drawing, the material according to the invention contains a layer 7 made of polypropylene fibers 2, pre-bonded beams 3 fibers by hypoproteinemia, and layer 4 of the hollow siliconized polakow the structure of the fibrous material layer 1 is made more dense, than layer 4.When using cloth made of such material is placed on a spot of oil or oil product surface side layer 1 and, thus, layer 1 made of polypropylene fibers with high affinity to the oil comes in contact with the contamination, which is sucked inside the open pores of the layer 1, filling them and moving on to the layer 4, pereraspredelyaet throughout the volume. When this layer 4 is holding the cloth on the water surface, because the hollow siliconized fiber 5, are included in it, filled with air, which gives buoyancy to the entire structure.Since layer 1 made of polypropylene fibers 2 more compacted due to the beams 3 and 6 than layer 4, fastened only by the beams 6 and the surface of the hollow fibers 5 layer 4 siliconserver, first there is a reduction of the speed of movement of pollution in the form of a mixture of water and oil from layer 1 to layer 4, and then reducing the speed of movement of water droplets in contact with the siliconized surface of the fiber 5 layer 4. Thanks to these two processes hollow fibers remain filled with air even when loaded with oil layer 1 and provide increased buoyancy of the whole cloth.In Savelievich fibers of 0.1 to 0.68 Tex, preferably 0.15 to 0,68 Tex, and the fibrous layer 4 is of hollow siliconized polyester staple fibres by weight of 0.33 to 1.0 dtex, preferably 0.55 Tex.So, for example, to collect oil spills (gasoline) takes the napkin from the material in which the layer 1 formed of polypropylene fibers 2-0,15 Tex, pre-bonded hypoproteinemia fascicles of 3, and layer 4 is of hollow siliconized polyester fiber 5-0,55 Tex. Both layers are bonded together by hypoproteinemia fascicles of 6.Extracting oil is easily accomplished by any mechanical means, in particular by pressing the sting shaft. This wipes out such material can be used multiple times.Perhaps the use of polypropylene fibers with a linear density of less than 0.1 dtex and more 0,68 Tex. However, in the first case, the difficult process of fibers on the carding and haloperidolum equipment, and the second is sharply reduced holding capacity of the material in relation to petroleum and petroleum products.As hollow siliconized fibers can for example be used such fibers Mogilev "Khimvolokno" (Belarus) or company DuPont (USA), known under the commercial names of petroleum products, includes two connected to each other by hypoproteinemia fibrous layer, one of which is made of polypropylene fibers and placed on the spot of oil, is made thicker than the other layer is less dense and is made of polyester fibers, characterized in that as polyester fibers used hollow siliconized polyester fiber that gives the whole structure of buoyancy.
FIELD: methods of production of electret items, electret filters and respirators.
SUBSTANCE: the invention presents a method of production of electret items, electret filters and respirators with heightened resistivity to the oil mist. The invention falls into production processes of electret items, electret packed beds and respirators, and may be used for removal of corpuscles from gases, especially for removal of aerosols from air. The method provides for: formation of a melted material consisting of a mixture of a polymer composed of a mixture of a polymer representing a non-current-conducting thermoplastic resin with a specific resistivity exceeding 1014 Ohms·cm with a fluorine compound as an additive compound; shaping it to the required form and quenching it up to the temperature lower than the melting point of the polymer. The material is calcined and treated with an electric charge to give it electret properties. The invention improves the capability of filtering oily aerosols.
EFFECT: the invention improves the capability of filtering oily aerosols.
19 cl, 16 tbl, 19 dwg, 23 ex