SU1730277A1 - Non-woven fabric - Google Patents

Abstract

Use: manufacture of filter elements of devices for fine air purification from toxic gases and solid particles. SUMMARY OF THE INVENTION: The skeleton is made in the form of a stitched-out beer-free material from ion-exchange modified polycaproamide fiber, wherein the ratio of the layers by weight is 1: (0.7-1.0), and the pile height is from 10 to 14 mm. 2 hp f-ly.

Description

The invention relates to the textile industry, in particular to the production of filter nonwovens, and can be used to make the filter elements of devices for fine air purification from toxic gases and solid particles.

Known needle-punched material from anion-exchange modified polycaproamide fiber (MPV) KM-A1. The fiber is a graft copolymer of polycaproamide and polydimethylaminoethyl methaclyrate. The material has high protective properties for sour gases (time to slip HC1-11.8 h, HP-23.8 h).

The disadvantages of this material are low degree of purification of solid particles (potassium dichromate 58%), decrease in sorption capacity with the accumulation of solid particles in the material, simultaneous growth of aerodynamic resistance, inability to use for cleaning the main gases.

Known in the film-pierced non-filar material from anion-exchange MPV

KM-AI. The material has a high time of protective action on hydrogen chloride.

The disadvantage of this material is the inability to use when cleaning the main gases, the low degree of purification of solid particles (potassium dichromate 45%).

Known needle-punched material obtained from a mixture of anion-and cation-exchange MPV. The material has good protective properties for sour and basic gases.

The disadvantages of this material are the low degree of purification of solid particles, a decrease in the sorption capacity with the accumulation of solid particles with a simultaneous increase in aerodynamic drag.

The closest to the present invention is a nonwoven fabric produced by the Volteks technology. Cotton fabric, article 4779, weave reinforced satin, weighing 145 g / m is used as a frame. The pile layer is made of a mixture of dragles C fibers

M

ABOUT

ABOUT

Yu

and

Lone (50 wt.%) and Nitron (50 wt.%). The material has a high specific surface, considerable strength. It is used as a heat shield. But such a material cannot be used to clean gas-air mixtures from toxic gases (time to HCI slip of 0.1 h).

The purpose of the invention is to expand the operational properties of the material.

This goal is achieved in that the nonwoven fabric consists of a textile frame, which is made of a non-woven material made of ion-exchange MPVs and a fibrous layer interconnected by means of pile loops formed by bundles of fibers constituting the fibrous layer. The ratio of the layers by weight is 1: (0.7-1). Anion-exchange KM-AI fiber and a cation-exchange fiber representing a graft copolymer of polycaproamide and polymethrylic acid, the ratio of fibers in the mixture (30-70) wt.%, The pile height is 10-14 mm are selected as ion-exchange MPV.

A comparative analysis with the prototype showed that the proposed material contains a non-thinnest material from ion-exchange MPV as a framework, which differs from the prototype. Such material can be used to clean air from toxic gases.

The proposed material has the ability to adsorb toxic gases, both acidic (time to HCI breakthrough 31.4 hours) and basic (time to breakthrough MPHs 5.5 hours), high purification efficiency for solid particles (purification rate for potassium dichromate 95% ), high specific surface, significant mechanical strength.

The effectiveness of the proposed material is due to the fact that the material consists of a skeleton, which is used as an impregnated threadless material made of ion-exchange MPV, and a pile layer. When cleaning gas-air mixtures containing particulate matter and toxic gases, purification from solid particles occurs in the pile layer. The pile layer is characterized by a high dust capacity, since the pile fibers are not twisted together, but arranged in parallel. The pile layer protects the ion exchange layer from the ingress of solid particles. In the ion exchange layer air purification from toxic gases occurs. Since dust particles are deposited on the pile fibers, the entire surface of the ion-exchange fibers is involved in the gas cleaning process, which increases the protective properties of the material. The presence of both cationic and anion-exchangeable fibers determines the possibility of cleaning and basic and acidic gases.

The ratio of the layers by weight 1: (0,7-1)

is optimal, since with a decrease in the ratio the protective properties of the material deteriorate. With an increase, an instability is observed in the process of obtaining the material,

0, the dynamic loads on the needles increase, the needles breakage increase, the aerodynamic resistance of the material increases, the breathability decreases.

Mixed fiber ratio

5 is optimal, since with increasing or decreasing, the protective properties of either acidic or basic gases are deteriorated. The pile height of 10-14 mm is optimal because it provides high

0 specific surface, high protective

properties. When reducing the height of the pile

the protective properties of the material deteriorate,

with an increase increases the consumption of materials.

The stitch length at binding is 5 mm, which corresponds to the stitch length of the material of the prototype.

The material is obtained using the Volteks technology on the Befamo Malimo production line, a type of Voltex. The mixture of fibers is combed on a Betham combing machine, then bonded to the frame on a Voltex machine.

According to standard methods, the properties of the material and material-proto5 type (GOST15902.1-80,

1509.3-79,12088-77,10185-75) under comparable conditions (concentration of HCI 100 mg / m, S02 150 mg / m3, NHa 25 mg / m3; humidity HCI 82%, S0290%, NH82%).

0 Material properties are given in Table. 1 and 2.

PRI me R 1. A mixture of 175 g of fibers Nitron (50 wt.%) And Dralon (50% wt.%) Comb through a carding machine. On the Voltex bus, the fibrous layer is bonded to the skeleton by binding with the fiber bundles of this layer with the simultaneous formation of pile loops. The frame is made of anion exchange MPV.

0 The ratio of the frame and the fibrous layer by weight of 1: 0.7. The pile height is 10 mm. By standard methods, the material properties are determined (the time to HCI breakthrough is 28.3 hours, the degree of purification by potassium dichromate

5 85%).

PRI mme R 2. A mixture of 190 g of fiber nitrone (50 wt.%) And dralon (50 wt.%) Comb through a carding machine. On a Voltex machine, the fibrous layer is bonded to a skeleton of an anion-exchange MPV by binding with bundles of fibers of this layer with the simultaneous formation of pile loops. The ratio of the frame and the fibrous layer by weight 1: 0,76. Height of pile is 10 mm. By standard methods, the material properties were determined (the time to HCI sweep was 29.1 h), the degree of purification of bichromate K was 88%. Indicators are given in table. one.

PRI me R 3. A mixture of 208 g of fiber nitron (50%) and dralon (50%) combed on a carding machine. On a Voltex machine, the fibrous layer is bonded to a skeleton of an anion-exchange MPV by binding with bundles of fibers of this layer with the simultaneous formation of pile loops. The ratio of the frame and the fibrous layer by weight 1: 0,83. Height of pile is 12 mm. By standard methods, the material properties were determined (the time to HCI slip of 29.9 hours, the degree of purification for potassium dichromate was 91%).

PRI me R 4. A mixture of 225 g of fiber nitron (50 wt.%) And dralon (50 wt.%) Comb through a carding machine. On the Voltex machine, the fibrous layer is bonded to the skeleton of an anion-exchangeable MPV with bundles of fibers of this layer with the simultaneous formation of pile loops. The ratio of the frame and the fibrous layer by mass is 1: 0.9. Height of pile is 14 mm. By standard methods, material properties were determined (time to HCI breakthrough of 30.1 h, the degree of purification for potassium dichromate was 92%).

PRI me R 5. A mixture of 250 g of fiber nitrone (50 wt.%) And dralon (50 wt.%) Comb through a carding machine. On a Voltex machine, the fibrous layer is bonded to a skeleton of an anion-exchange MPV by binding with bundles of fibers of this layer with the simultaneous formation of pile loops. The ratio of the frame and the fibrous layer by weight is 1: 1. Height of pile is 14 mm. By standard methods, the material properties were determined (time to breakthrough of HCI31.4 h, the degree of purification for potassium dichromate was 95%).

PRI me R 6. A mixture of 175 g of fibers nitron (50 wt.%) And dralon (50 wt.%) Comb through a carding machine. On the Voltex machine, the fibrous layer is bonded to the skeleton with a thread-free material from ion-exchange MPV (the content of cation-exchange MPV is 70% by weight, anion-exchange is 30% by weight). The ratio of the frame and the fibrous layer by weight is 1: 0.7. Height of pile is 10 mm. According to standard methods, the material properties were determined (time to HCI breakthrough of 27.3 h, MPH 5.3 h, purification degree of potassium dichromate 85%.

PRI me R 7. A mixture of 190 g of fibers Nitron (50 wt.%) And Dralon (50 wt.%) Comb through a carding machine. On the Voltex machine, the fibrous layer is bonded with a non-filamentous material made of ion-exchange MPV with an anion-exchange fiber content of 40% by weight, and cation-exchange material being 60% by weight. The ratio of the frame and the fibrous layer by weight 1: 0,76. Height of pile is 10 mm. By standard methods, the material properties are determined (time to HCI breakthrough

0 27.8 h, MPH 5.2 h, the degree of purification of potassium bichromate 88%).

PRI me R 8. A mixture of 208 g of fibers Nitron (50 wt.%) And Dralon (50 wt.%) Comb through a carding machine. By car

5 Voltex fiber layer bonded with a threadless material of ion-exchange MPV, when the content of anion-exchange MPV 50 wt.%, Cation-exchange 50 wt.% The ratio of the skeleton and fiber layer

0 by weight 1: 0.83. Height of pile is 12 mm. According to standard methods, the material properties were determined (the time to HCI breakthrough was 28.2 hours, the discharge rate was 5.0 hours, the purification rate for potassium dichromate was 91%).

5 PRI me R 9. A mixture of 250 g of the fiber nitron (50 wt.%) And dralon (50 wt.%) Comb through a carding machine. On the Voltex machine, the fibrous layer is bonded to the beadless ion exchange material.

0 fibers with an anion-exchange MPV content of 60 wt.%, A cation-exchange MPV 40 wt.%. The ratio of the frame to the fibrous layer by weight is 1: 1, the pile height is 14 mm. By standard methods, the properties of the material were determined (the time to HCI breakthrough was 28.5 hours, the oil pressure was 4.8 hours, the degree of purification for potassium dichromate was 92%).

EXAMPLE 10 A mixture of 250 g of fiber, nitrone (50 wt.%) And dralon (50 wt.%) Is combed on a carding machine. On the Voltex machine, the fibrous layer is bonded with a non-filamentous material of ion-exchange MPV with an anion-exchange fiber content of 70% by weight, cation-exchange 30

5 wt.%. The ratio of the layers by weight is 1: 1. Height of pile is 14 mm. By standard methods, the material properties were determined (time to breakthrough, Och, Mn3.4 h, the degree of purification for potassium dichromate 95%).

Claims (3)

0 Non-woven material can be used in devices for fine air purification from toxic gases and solid particles. Invention Non-woven material consisting of a layer 5 of the textile carcass and the fibrous layer interconnected by means of pile loops formed by bundles of fibers constituting the fibrous layer, in which, in order to enhance the performance properties, the carcass made in the form of a piercing-free non-filament material from ion-exchange modified polycaproamide fiber, the ratio of the layers by weight is 1: (0.7-1.0), and the pile height is 10-14 mm. 2. The material according to claim 1, characterized by the fact that, in the pierced-piercing, the non-threaded material is made of anion-exchangeable modified polycaproamide fiber. 3. A material according to claim 1, characterized in that in a pierced-through threadless material is made of a mixture of anionic and cation-exchange modified polycaproamide fibers as a percentage. Table 1 The comparative characteristic of the framework is made of a threadless A comparative characteristic of the properties of a nonwoven material, in which a non-woven material from a mixture of anionic and cation-exchange NP8 is used as a framework. in non-woven material, in which a quality material from anion-exchange MP8 Table 2