Multilayer filtering material

FIELD: textile fabrics, paper.

SUBSTANCE: invention is related to multilayer filtering materials. Suggested nonwoven material consists of inlet and outlet layers. Outlet layer consists of main and additional sublayers previously attached to each other. Inlet layer and main sublayer of outlet laye consist of mixture of hollow silicone fibre with linear density of 0.68 tex and polypropylene fibre with linear density of 2 tex, and additional sublayer of outlet layer consists of polypropylene fibre with linear density of 0.68 tex. Ratio of surface densities of inlet and outlet layers makes 1:1÷1:1.5.

EFFECT: improved operational properties.

2 dwg

 

The invention relates to the production of nonwoven filter media, designed for cleaning atmospheric air from dust, which comes in spray-drying chamber, mounted on the car plants and car factories.

Known multilayer filter material described in A.S. No. 1583142, CL IPC B01D 39/16, published. 07.08.90. The material is intended for cleaning atmospheric air from dust, including coming in internal combustion engines.

According to the invention a multilayer non-woven filter material extends from the air inlet side of the loose layer of coarse synthetic fibers and on the output side of the air tight layer of thin synthetic fibers. The layers are connected by bundles of fibers through hypoproteinemia. Between loose and dense layers placed intermediate layer in the form of a flat glued or thermally bonded non-woven material.

Describes the material due to the weakly bonded structure and the presence of the intermediate layer is partially destroyed when the bond hypoproteinemia areas may not provide sufficient filtration and high dust holding capacity with a slight increase in the resistance required when cleaning atmospheric air supplied to the spray-drying chamber.

This material bol is the most similar essential features and their purpose is the closest analog is proposed and can be used as a prototype.

The objective of the invention is to provide a filtering material having high dust holding capacity up to 8000 g/m2and providing a nominal fineness of dropout 15 microns.

This technical result is achieved due to the fact that the output layer consists of pre-bonded between a primary and secondary, hardened by heat treatment, sub-layer and the input layer and the main sublayer of the output layer consists of a blend of hollow siliconized fiber linear density of 0.68 Tex and polypropylene fibers with a linear density of 2 Tex with a ratio of fibers (wt%) 40:60, and an additional sublayer of the output layer consists of polypropylene fibers with a linear density of 0.68 Tex, and the ratio of surface densities of the primary and secondary sublayers is (wt.%) 80:20 with a ratio of surface densities of the input and output layers 1:1÷1:1,5.

Coarse polypropylene fibers produce three-dimensional frame structure, which is filled with siliconized fibers with specific smooth slippery surface. Due to this particle contamination when filling patterns, easily gliding over the surface of the fibers, redistributed, without clogging interfibrillar space that provides slow growth resistance.

Additional sublayer of the output layer of finer fibers provides barrier properties of the filter material and the detention of smaller particles, and it melted the surface eliminates the entrainment of small particles of fiber and getting them into working solutions spray chambers, which is very important when painting vehicles.

Summary of the invention the following examples 1 and 2.

Example 1. Fibrous base multilayer filter material formed in a known manner (see, for example, Mderately and other Mechanical technology production of nonwoven materials. M: Light industry, 1973, str). Input pre-bonded layer formed of a mixture of hollow siliconized fibers with a linear density of 0.68 Tex and polypropylene fibers with a linear density of 2.0 dtex when the ratio of fibers (wt%) 40:60. When generating the output layer on the sublayer siliconized fibers with a linear density of 0.68 Tex and polypropylene fibers with a linear density of 2.0 dtex when the ratio of fibers (wt%) 40:60 incorporating a sublayer of polypropylene fibres and with a linear density of 0.68 Tex. The formation of layers of the led so that the ratio of surface densities of the input and output layers was 1:1. Both layers were bonded by hypoproteinemia. The sublayer of the polypropylene fiber is n condensed by processing on the calender under certain temperature and pressure.

Example 2. Input pre-bonded layer formed of a mixture of hollow siliconized fibers with a linear density of 0.68 Tex and polypropylene fibers with a linear density of 2.0 dtex when the ratio of fibers (wt%) 40:60. When generating the output layer on the sublayer siliconized fibers with a linear density of 0.68 Tex and polypropylene fibers with a linear density of 2.0 dtex when the ratio of fibers (wt%) 40:60 incorporating a sublayer of polypropylene fibres and with a linear density of 0.68 Tex. The formation of layers of the led so that the ratio of surface densities of the input and output layers was 1:1,5. Both layers were bonded by hypoproteinemia. The sublayer of polypropylene fibers was condensed by processing on the calender under certain temperature and pressure.

The obtained filter material used in painting and drying chambers, installed in automotive plants and car factories.

The test results of the filtering ability of the developed material by the method of electron microscopy are presented in figure 1 and 2.

The test results confirm the result.

Multilayer filter material, including input and output layers of synthetic fibers, bonded together by bundles of fibers by means of acupuncture is rotaliana, characterized in that the output layer consists of pre-bonded between a primary and secondary, hardened by thermal treatment of substrates, the input layer and the main sublayer of the output layer consists of a blend of hollow siliconized fiber linear density of 0.68 Tex and polypropylene fibers with a linear density of 2 Tex with a ratio of fibers (wt.%), is 40:60, and an additional sublayer of the output layer consists of polypropylene fibers with a linear density of 0.68 Tex, and the ratio of surface densities of the primary and secondary sublayers is (wt.%) 80:20 with a ratio of surface densities of the input and output layers are 1:1÷1:1,5.



 

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5 cl, 1 tbl, 1 dwg

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