Non-woven protective material

 

(57) Abstract:

The invention relates to the manufacture of nonwoven materials and can be used as a protective material for aggressive environments. The technical result - the increase of the protective properties of the material when working with aggressive media (acids, alkalis). This result is ensured by the fact that non-woven material comprising two layers, one of which is made of a mixture of anion-exchange and cation-modified nylon fibers and the other of the hydrophilic modified nylon fibers bonded hypoproteinemia, further comprises a layer of polypropylene fibers, located above the layer of a mixture of anion-exchange and cation-modified nylon fibers, and as anion-exchange fiber is fiber-based graft copolymer of polycaproamide and polydimethylaminoethyl, and as a cation-exchange fibre based on phosphorylated grafted copolymer of polycaproamide and polyglycerylmethacrylate, the content of the latter in the mixture is (35-65) wt.%the layer of hydrophilic fibers is located under a layer of a mixture of aminoethane relates to the manufacture of nonwoven materials and can be used as a protective material for aggressive environments.

Known non-woven protective material comprising a base of fibrous canvas of a modified polyamide fibers bonded loops warp weave of the bundles of fibers of the canvas [AC USSR 1805152, D 04 H 13/00. Non-woven protective material, 1993]. The base has an additional layer of polypropylene volokna and looped pile of hydrophilic modified polyamide fiber.

The lack of material are non-resistant to aggressive environments, the main character, such as alkalis.

The closest solution is non-woven material comprising two layers, made of modified nylon fibers, bonded hypoproteinemia [AC USSR 1682431 non-Woven material, 1991 - prototype]. One layer made of hydrophilic modified nylon fiber megalon, and the second from a mixture of anion-exchange modified polyamide fiber when the content of 40-60% by weight and cation-modified polyamide fiber, the content of the cation exchange fiber is 40-60% by weight of the mixture. As the anion-exchange fiber is used on the basis of grafted copolymer of polycaproamide and polydimethylaminoethyl iloveu acid. The disadvantage of the material is low resistance to aggressive environments.

The technical task of the invention is to increase the protective properties of the material when working with aggressive media (acids, alkalis).

The task is ensured by the fact that non-woven material comprising two layers, one of which is made of a mixture of anion-exchange and cation-modified nylon fibers and the other of the hydrophilic modified nylon fibers further comprises a layer of polypropylene fibers, located above the layer of a mixture of anion-exchange and cation-modified nylon fibers, and as anion-exchange fiber is fiber-based graft copolymer of polycaproamide and polydimethylaminoethyl, and as a cation-exchange fibre based on phosphorylated grafted copolymer of polycaproamide and polyglycerylmethacrylate, the content of the latter in the mixture is (35-65) wt.%, a layer of hydrophilic fibers is located under a layer of a mixture of anion-exchange and cation-exchange fibers, the ratio of the layer by weight is 1:(0,5-0,7):0,3.

Analysis sidnie fiber, however, the inventive material comprises anion-exchange fibre based graft copolymer polycaproamide with polydimethylaminoethyl and cation-exchange fibre based phosphorylated grafted copolymer of polycaproamide with polyglycerylmethacrylate. Material-the prototype of such fibers in its composition has not. The composition of the claimed material is polypropylene fiber. Material-the prototype of the fibre in its composition has not. Consequently, we declare that the material meets the criterion of "novelty".

The effectiveness of the proposed material due to the fact that it contains a layer of polypropylene fibers having a high resistance to aggressive media (acids and alkalis), a layer of a mixture of anion-exchange fiber-based graft copolymer polycaproamide with polydimethylaminoethyl and cation-exchange fibre based on phosphorylated grafted copolymer of polycaproamide with polyglycerylmethacrylate and the hydrophilic layer of the modified polyamide fibers in a certain ratio. In contact with aggressive environment comes a layer of polypropylene fibers. Deposited droplets of alkali or acid linger on the fibers ecohaus in ion exchange reactions with enaminoaldehyde and cation-exchange fibers. Introduction the composition of the mixture of cation exchange fibers with high static exchange capacity (SOYA NaOH up to 4 mg/EQ-g dry. fiber), and a significant normal humidity (up to 3.6%), and anion-exchange fiber-based graft copolymer polycaproamide with polydimethylaminoethyl with the SOYA HCl to 2.5 mEq/g dry. fiber and high normal humidity (W to 5.7%) makes it possible to catch acids and alkalis. The hydrophilic layer of the modified polyamide fibers increases the protective properties and material provides high hygienic conditions. Introduction to the composition of the material layer from the hydrophilic polyamide fibers increases the overall humidity of the material, causes additional swelling of the ion exchange fibers, thereby improving the ability to chemisorption, improved protective properties. Improving hygienic properties, in particular the lowering of the electrified, due to the fact that the composition of the material includes a polypropylene fiber, loaded negatively and polyamide fiber, loaded positively, and that contributes to the production of a material with low electrified.

The selection of the ratio of layers Chemodanov, ion-exchange and hydrophilic is the local properties, the increase in the content of these fibers affects the hygienic properties. The reduction in the content of hydrophilic modified polyamide fiber megalon affects the hygienic properties, increasing its content increases the stiffness and increases the intensity.

The selection of the ratio of the content of the cation exchange fiber in the material due to the fact, to ensure a high protective properties. With the increase of its content above 65% reduction of total normal humidity of the material, which lowers the protective properties of both acids and alkalis. After the reduction of its content below 35% decrease of the protective properties of the alkali.

Thus, the presence in the composition of the material of the additional layer of polypropylene fibers, is introduced in a ratio by weight of hydrophilic and ion-exchange layers, as well as the introduction of the ion-exchange anion-exchange layer of fiber-based graft copolymer polycaproamide with polydimethylaminoethyl and cation-exchange fibre based on phosphorylated grafted copolymer of polycaproamide with polyglycerylmethacrylate in the optimal ratio, provides protection from areseveral get punched technologies. Fiber combing on the carding machines, form a three-layer fibrous canvas on the Converter webs, fasten on needle machine.

According to the standard methods (GOST 15902.1-80, 15902.3-79, 12088-77, 16166-70, 10185-75, 16166-70, 12.4.048-78) defined properties of the inventive material and the material of the prototype under comparable conditions.

Example 1. 200 g of polypropylene fibres combing on the carding machine, the fibrous mixture containing 48 g of anion-exchange fiber-based graft copolymer polycaproamide with polydimethylaminoethyl and 72 g of cation-exchange fibre based on phosphorylated grafted copolymer of polycaproamide with polyglycerylmethacrylate combing on the second carding machine, 60 g of hydrophilic modified polyamide fiber combing the third carding machine to form a fibrous canvas and fasten it on the needling machine.

Example 2. 200 g of polypropylene fibres combing on the carding machine, the fibrous mixture containing 50 g of anion-exchange fiber-based graft copolymer polycaproamide with polydimethylaminoethyl and 50 g of cation-exchange fibre based on phosphorylated grafted copolymer parvanova polyamide fibers combing the third carding machine, form a fibrous canvas and fasten it on the needling machine.

Example 3. 200 g of polypropylene fibres combing on the carding machine, the fibrous mixture containing 90 g of anion-exchange fiber-based graft copolymer polycaproamide with polydimethylaminoethyl and 50 g of cation-exchange fibre based on phosphorylated grafted copolymer of polycaproamide with polyglycerylmethacrylate combing on the second carding machine, 60 g of hydrophilic modified polyamide fiber combing the third carding machine to form a fibrous canvas and fasten it on the needling machine.

Performance properties given in the table.

The material has a high efficiency protection against aggressive environments (acid 14%, collateralizable 35 min, deletefromdocument 34 min), significant mechanical strength (breaking load up to 756 N), good hygienic parameters (permeability to 245 DM3/(m2·C), normal humidity 8,0%).

Non-woven protective material comprising two layers, one of which is made of a mixture of anion-exchange and cation-modified kuivaniemi, characterized in that it further comprises a layer of polypropylene fibers, located above the layer of a mixture of anion-exchange and cation-modified nylon fibers, the anion-exchange fiber is fiber-based graft copolymer of polycaproamide and polydimethylaminoethyl, and as a cation-exchange fiber - based fiber phosphorylated grafted copolymer of polycaproamide and polyglycerylmethacrylate, and the content of the latter in the mixture is 35-65 wt.%, and a layer of hydrophilic fibers is located under a layer of a mixture of anion-exchange and cation-exchange fibers, the ratio by weight of layers of polypropylene fibers from a mixture of anion-exchange and cation-exchange fibers and hydrophilic fibers is 1:(0,5-0,7):0,3 respectively.



 

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