Method of electrospinning

FIELD: electricity.

SUBSTANCE: fibre electrospinning is carried out from an electroconductive solution of polymer in presence of electric field between a nozzle and a source of earthing. In the method realisation the polymer before and after electrospinning process is exposed to linking reaction. At the same time the polymer contains linked silane groups along the length of the main chain of polymer, and the linked groups react with water, including water contained in air. The fibre made according to the method of electrospinning contains links -Si-O-Si-.

EFFECT: using linking reaction before and during the process of electrospinning results in increased viscosity of polymer solution, making it possible to form the fibre and to reduce usage of thickeners to the minimum.

14 cl, 2 dwg, 1 tbl, 3 ex

 

The technical field to which the invention relates.

The present invention relates to a method of electroprecizia, resulting by way of electroprecizia fiber and polymers used in the method of electroprecizia.

The level of technology

In the way electroprecizia for forming fine fibers using an electrical charge. The method is to use a mouthpiece with a metering needle, syringe pump, power source and a grounded collector device. Polymers in solution or in the melt is placed in a syringe and syringe pump serves on the tip of the needle, where they form a drop. In the case of application to the needle voltage drop is stretched, becoming electrified jet of fluid. The jet extends continuously until its deposition on the collector in the form of a Mat of fine fibers, typically having dimensions in the nanometer range. The resulting fibers are suitable for use in a wide range of applications such as protective clothing, bandaging wounds and the substrate or the carrier for catalyst. For molding fiber melt or polymer solution must have sufficient viscosity, otherwise instead of a jet of liquid will produce a drop. Usually to give the required viscosity in solution and the and the melt polymer include thickeners. However, the thickeners can have a negative impact on the properties of the resulting fibers, and for this reason their use should be minimized.

Brief disclosure of the invention

The present invention provides a method of electroprecizia fibers of the electrically conductive polymer solution in the presence of an electric field between the mouthpiece and the grounding source. The polymer before and during the process electroprecizia subjected to the crosslinking reaction, which results in increased viscosity of the polymer solution, making possible the formation of fibers and minimizing the use of thickeners.

The invention also provides the resulting by way of electroprecizia fiber, which has a silane, preferably carboxyl, hydroxyl group and optionally a nitrogen-containing group, such as amine or amide groups. Silane groups provide passage stitching and viscosity increase. Carboxyl, hydroxyl, amine and amide groups ensure the formation of hydrogen bonds and an increase in viscosity. The carboxyl group in the form of a carboxylic acid group and a nitrogen-containing group is a good group bearing an electric charge.

Brief description of drawings

Figure 1 shows the basic system for electroprecizia, f is Data2 models picture obtained by the method of scanning electron microscopy (SEM) for non-woven Mat.

Detailed disclosure of the invention

For the purposes of the following further detailed description of the invention should be understood that the invention may take various alternative variations and sequence stages except in those cases where definitely will be back. In addition, unlike any working examples or cases when it is specified otherwise, all numbers expressing, for example, the number of ingredients used in the description of the invention and the claims should be understood as in all cases modified by the term "approximately". Accordingly, unless indicated to the contrary, the numerical parameters in the following description of the invention and the accompanying claims, are approximate values that may vary depending on the desired properties obtained in the present invention. At the very least, and not in an attempt to limit the application to the scope of the claims of the doctrine of equivalents, each numerical parameter should be construed, at least in the light of the given number of significant numerical digits and in the framework of the conventional methods of rounding. Despite the fact that number is s ranges and parameters representing the broad scope of the invention, are approximate values, numerical values shown in the specific examples described most accurately. However, any numerical value by its very nature, includes specific errors as necessary resulting from the availability of standard errors that occur in the results of measurement obtained in the respective tests.

In addition, it must be understood that any numerical range specified in the present document, is intended to include all podpisano included in its limits. For example, the range of "1 to 10" is intended to include all sub-ranges between (and including) the minimum value of 1 up to (and including) the maximum value of 10, that is, if the minimum value is equal to or more than 1, and a maximum value equal to or smaller than 10.

In this application the use of the singular includes the use of the plural, and the use of the plural includes the singular number, unless specifically do not specify another. In addition, in this application the use of "or" means "and/or", unless specifically is not specified otherwise, even though unambiguous use the/or" in some cases.

The term "polymer" also includes the incorporation of the copolymer and oligomer. The term "acrylic" refers to the inclusion of the term "methacrylic", and is represented as "(meth)acrylic".

As you can tell, referring to figure 1, the system for electroprecizia consists of three main components - power supply 1, the mouthpiece 3 and electrosensing collector 4. In the way electroprecizia can be used direct current or alternating current. The polymer solution 5 contained in the syringe 7. Syringe pump 9 perelavlivaet the solution through the mouthpiece 3 at a controlled flow rate. At the tip of the needle 11 is formed by a drop of the solution. When a voltage is usually in the range from 5 to 30 kilovolts (kV), the drop becomes electrically charged. Therefore, the droplet undergoes the impact of the electrostatic repulsion between the surface charges and the forces created by external electric field. Data electric power will distort drop and, ultimately, will overcome the surface tension of the polymer solution, resulting in the ejection of a jet of fluid 13 from the tip of the needle 11. Due to its charge jet is drawn down towards the grounded collector 4. During their movement in the direction of the collector 4 jet 13 is subjected to tensile impact provodyaschemu the formation of fine fibers. Loaded fiber is deposited on the collector 4 in the form of randomly oriented non-woven Mat for the General case shown in figure 2.

The polymers of the present invention may be acrylic polymers. In accordance with the usage in this document, the term "acrylic polymer refers to those polymers that are well known to experts in the relevant field of technology and which is obtained by carrying out polymerization for one or more of the polymerized materials with the unsaturation of ethylene type. (Meth)acrylic polymers suitable for use in the present invention can be obtained according to any one of a wide range of ways, as it should be understood by experts in the relevant field of technology. (Meth)acrylic polymers can be obtained by carrying out polymerization connection for the unsaturated curable materials, which have a silane group, carboxyl group, hydroxyl group and optionally a nitrogen-containing group. Examples Milanovich groups include the following, but are not limited to only these groups, which have Si-Xn(where n is an integer having a value from 1 to 3, and X is chosen from chlorine, complex alkoxyamino and/or complex acyl is of cefiro). Such groups are hydrolyzed in the presence of water, including moisture in the air, with the formation of silanol groups, which are condensed with the formation of groups-Si-O-Si-.

Examples selectarray of the polymerized materials with the unsaturation of ethylene type, suitable for use upon receipt of such (meth)acrylic polymers include the following, but are not limited to only these: alkoxysilane with the unsaturation of ethylene type and alloccasion with the unsaturation of ethylene type, more specific examples of which include vinylsilane, such as VINYLTRIMETHOXYSILANE, createassociation, such as gamma acrylonitrilebutadiene and gamma aryloxypropanolamine, and methacryloyloxyethyl, such as gamma methacryloxypropyltrimethoxysilane, gamma methacryloxypropyltrimethoxysilane and gamma-methacryloxypropyl(2 methoxyethoxy)silane; alloccasion, including, for example, Galatasaray, methacryloyloxyethyl and acetoxysilane with the unsaturation of ethylene type, such as createprofilerviewerelement and methacryloyloxyethyl. In certain embodiments of desirable may be the use of monomers, which results in the polymerization accession will result in a (meth)acrylic polymer in which the om Si atoms in the resulting hydrolyzable silyl groups will be separated from the main polymer chain, at least two atoms. The preferred monomers are (meth)aryloxyalkanoic, in particular (meth)aryloxyalkanoic, in which the alkyl group contains from 2 to 3 carbon atoms, and alkoxygroup contain from 1 to 2 carbon atoms.

In certain embodiments of the amount selectabase of the polymerized material, the unsaturation of ethylene type, used in the total mixture of monomers is chosen so that the result to obtain (meth)acrylic polymer having a silane group containing from 0.2 to 20, preferably from 5 to 10, weight percent of silicon in the calculation of the total mass of the combination of monomers used for obtaining the (meth)acrylic polymer.

(Meth)acrylic polymer suitable for use in the present invention, may be a reaction product of one or more of the above-mentioned selectarray of the polymerized materials with the unsaturation of ethylene type, and preferably the polymerized material, the unsaturation of ethylene type, which contains carboxyl, such as the group of carboxylic acid or carboxylic acid anhydride. Examples suitable for use acids with unsaturation of ethylene type, and/or their anhydrides include the following, but not limited to what are stated only these: acrylic acid, methacrylic acid, taconova acid, crotonic acid, maleic acid, maleic anhydride, citraconic anhydride, itacademy anhydride, sulfonic acid with ethylene saturation type and/or anhydrides, such as sulfoaildenafil, and complex palefire maleic and fumaric acids, such as butylhydroxytoluene and acylhydrolase, in which one carboxyl group is subjected to esterification under the influence of alcohol.

Other examples of the polymerized monomers with the unsaturation of ethylene type, allowing to introduce carboxyl functionality are alkyl-, including cycloalkyl-, and aryl(meth)acrylates containing from 1 to 12 carbon atoms in the alkyl group and from 6 to 12 carbon atoms in the aryl group. Specific examples of such monomers include methyl methacrylate, n-butylmethacrylate, n-butyl acrylate, 2-ethylhexylacrylate, cyclohexylmethyl and fenilsalicilat.

The amount of the polymerized carboxyl-containing monomers with ethylene unsaturation of the type preferably is sufficient to get the content of carboxyl that goes up to 55, preferably in the range from 15.0 to 45,0, mass percent when calculated on the total weight of the combination of monomers used for obtaining the (meth)acrylic polymer. Preferably, the lower is her least part of the carboxyl groups formed carboxylic acid so that the acid number of the polymer will be in the range from 20 to 80, preferably from 30 to 70, based on 100% solids resin.

(Meth)acrylic polymer used in the invention also preferably contains hydroxyl functionality, usually resulting from use hydroxypentanal of the polymerized monomer with the unsaturation of ethylene type. Examples of such materials include hydroxyalkyl esters of (meth)acrylic acid containing from 2 to 4 carbon atoms in the hydroxyalkyl group. Specific examples include hydroxyethyl(meth)acrylate, hydroxypropyl(meth)acrylate and 4-hydroxybutyl(meth)acrylate. The number hydroxyquinoline monomer with the unsaturation of ethylene type is sufficient for obtaining a content of hydroxyl, reaching up to 6.5, such as in the range from 0.5 to 6.5, preferably from 1 to 4, weight percent when calculated on the total weight of the combination of monomers used for obtaining the (meth)acrylic polymer.

(Meth)acrylic polymer optionally contains a nitrogen-containing functionality introduced with the help of nitrogen-containing monomer with the unsaturation of ethylene type. Examples of the nitrogen-containing functionality are amines, amides,urea, the imidazoles and pyrrolidone. Examples suitable for use N-containing monomers with ethylene unsaturation are amidofunctional curable materials with the unsaturation of ethylene type, which include the following, but are not limited to only these: p-dimethylaminoacetyl, tert-butylaminoethyl(meth)acrylate, dimethylaminoethyl(meth)acrylate, diethylaminoethyl(meth)acrylate, dimethylaminopropyl(meth)acrylate and dimethylaminopropyl(meth)acrylamide; amidofunctional materials unsaturation of ethylene type, which include acrylamide, methacrylamide, n-methylacrylamide and n-ethyl(meth)acrylamide; mochevinoformaldegidnye monomers with the unsaturation of ethylene type, which include methacrylamidoethylene.

In the case of nitrogen-containing monomer with the unsaturation of ethylene type, its amount is sufficient to obtain a nitrogen content that goes up to 5, such as from 0.2 to 5.0, preferably from 0.4 to 2.5 mass% based on the total weight of the combination of monomers used for obtaining the (meth)acrylic polymer.

In addition to the above-mentioned curable monomers for obtaining (meth)acrylic polymer can be used and other polymerized monomers with the unsaturation of ethylene type. Examples of the same, the monomers include poly(meth)acrylates, such as etilenglikoli(meth)acrylate, trimethylolpropane(meth)acrylate, diameteroperating; aromatic vinyl monomers such as styrene, vinyltoluene and alpha methylsterol; monoolefins and diolefins hydrocarbons, unsaturated esters of organic and inorganic acids and esters of unsaturated acids and NITRILES. Examples of such monomers include 1,3-butadiene, Acrylonitrile, vinylboronate, vinyl acetate, allylchloride, divinylbenzene, diallylmalonate, treelistener, and mixtures thereof. Polyfunctional monomers, such as polyacrylates, if their use is usually present in quantities reaching up to 20 mass percent. Monofunctional monomers, if present in use the number that goes up to 70 weight percent; the percentage gain in the calculation of the total mass of the combination of monomers used for obtaining the (meth)acrylic polymer.

(Meth)acrylic polymer is usually obtained in the solution polymerization for the polymerized monomers with the unsaturation of ethylene type in the presence of a polymerization initiator, such as azo compounds such as alpha,alpha'-azo-bis(isobutyronitrile), 2,2'-azo-bis(methylbutyronitrile) and 2,2'-azo-bis(2,4-dimethylvaleronitrile); peroxides, so is e as benzoyl peroxide, Gidropress hydroperoxide and tert-AMYLPEROXY-2-ethylhexanoate; (tertiary butyl)peracetate; (tertiary butyl)perbenzoate; isopropylcarbonate; butylisopropylamine and similar compounds. The amount of initiator used can vary considerably, but in most cases it is desirable the use of from 0.1 to 10 weight percent of the initiator when the calculation of the total mass used copolymerizing monomers. In the polymerization mixture can be added to the modifier circuit or controller of the degree of polymerization. This purpose can be used mercaptans, such as dodecylmercaptan, (tertiary dodecyl)mercaptan, artilleryman, exillerating, and mercaptoacetyltriglycine, such as 3-mercaptopropionylglycine and other regulators degree of polymerization, such as cyclopentadiene, ZIOC scientists, allylcarbamate and mercaptoethanol.

The polymerization reaction for the mixture of monomers for obtaining the acrylic polymer can be carried out in a medium of an organic solvent using conventional methods, solution polymerization, which are well known in the field of polymers obtained by carrying out polymerization by accession, and specifically illustrated, for example, in the patents of the United States of America No. 2978437; 079434 and 3307963. Organic solvents that can be used in the polymerization of monomers include almost any organic solvents, often used to obtain acrylic or vinyl polymers, such as, for example, alcohols, ketones, aromatic hydrocarbons or mixtures thereof.

Illustrative organic solvents of the aforementioned type, which can be used are alcohols, such as lower alkanols containing from 2 to 4 carbon atoms, including ethanol, propanol, isopropanol and butanol; partial ethers of polyols, such as monoethylamine ether of ethylene glycol, monobutyl ether of ethylene glycol, onomatology ether of propylene glycol and monotropy broadcast dipropyleneglycol; ketones such as methyl ethyl ketone, methyl-N-butylketone and methyl isobutyl ketone; esters such as butyl acetate and aromatic hydrocarbons, such as xylene, toluene and naphtha.

In certain embodiments of the polymerization components unsaturation of ethylene type is carried out at a temperature in the range from 0C to 150C, such as from 50C to 150C, or in some cases from 80C to 120C.

The polymer obtained as described earlier, usually dissolved in a solvent and are usually solids content of the resin in the range from approximately 15 d is 80, preferably from 20 to 60 weight percent when calculated on the total weight of the solution. The molecular weight of the polymer is usually in the range of 3000 to 1000000, preferably from 5,000 to 100,000, according to the definition by the method of gel permeation chromatography using a polystyrene standard.

With regard to applications when electroprecizia, the polymer solution, such as described previously, can be mixed with water to initiate the crosslinking reaction and increasing the viscosity required for forming fibers. Typically, the polymer solution add approximately from 5 to 20, preferably from 10 to 15, weight percent water, with a mass percentage obtained when the calculation of the total mass of the polymer solution and water. Preferably for catalysis reactions are stapled to the solution of water-polymer type base, such as water-soluble organic amine. For a better regulation of the viscoelastic behavior of recipes for electroprecizia it may not necessarily be added to the thickener, such as polyvinylpyrrolidone, polyvinyl alcohol, polyvinyl acetate, polyamides and/or cellulosic thickener. In the case of thickening agent is present in amounts not greater than 20 weight percent, usually in the range from 1 to 6 mass percent, p and based on the weight of polymer solution.

Recipe for electroprecizia obtained as described earlier, then store to ensure increasing the viscosity to a level appropriate reaction stitching. At a sufficiently high viscosity, but shortly before the moment of gelation of the formulation is subjected to the process of electroprecizia, as described previously.

In the way electroprecizia viscosity is usually at least 5 and is less than 2000, typically less than 1000, such as preferably being in the range from 50 to 250, Centistokes. The viscosity is determined using a bubble viscometer in accordance with ASTM D-1544. The retention time of the formulation to electroprecizia will depend on several factors, such as temperature, functionality stitching and a catalyst. Usually the recipe for electroprecizia will be retained for a period of time ranging from as little as one minute up to two hours.

During the process of electroprecizia formulations described previously, will usually result in fibers having a diameter that goes up to 5000, such as in the range from 5 to 5000 nm, more frequently in the range from 50 to 1200 nanometers, such as from 50 to 700 nanometers. Fiber can also have a belt configuration, and in this case, the diameter implies about the value of the largest dimension of the fiber. Usually the width of the ribbon-like fibers comes up to 5000, for example in the range from 500 to 5000 nanometers, and a thickness goes up to 200, for example in the range from 5 to 200 nanometers.

To demonstrate the General principles of the invention offers the following examples. However, the invention should not be construed as limited to the specific examples presented. All parts are mass, unless specified otherwise.

Examples a, b and C

Synthesis of acrylic-Milanovich polymers

For each of the examples a to C in the following table, the reaction flask provided with stirrer, thermocouple, inlet for nitrogen and a refrigerator. Then added the download and nitrogen atmosphere were stirring at temperatures up to boiling under conditions of flavobacteria (75-80C). To boiling under conditions of flavobacteria ethanol for three hours at a time was added loading In and loading C. the Reaction mixture is in a state of boiling under conditions of flavobacteria maintained for two hours. After this period of time of 30 minutes was added load D. the Reaction mixture for two hours was kept in a state of boiling under conditions of flavobacteria, and then was cooled to 30C.

Example aThe example InExample
Download (weight in grams)
Ethanol SDA 401360,1752,81440,2
Loading (weight in grams)
The methyl methacrylate12,841,8137,9
Acrylic acid8,718,134,6
SilquestA-1742101,4211,9405,4
2-Hydroxyethylmethacrylate14,50,30,64
n-butyl Acrylate0,20,30,64
Acrylamide 7,2--
Sartomer SR 3553-30,3-
Ethanol SDA 40B155,7325,5622,6
Download (weight in grams)
Vazo 6746,112,824,5
Ethanol SDA 40B76,7of 160.4306,8
Download D (weight in grams)
Vazo 671,52,16,1
Ethanol SDA 40B9,118,936,2
% solids17,919,519,1
Acid number (100%51,9645,6445,03
solid resin)
Mn-302155810
1Denatured ethyl alcohol, 200 of the first fortress on the system adopted in the USA, available in the company's Archer Daniel Midland Co.
2Gamma methacryloxypropyltrimethoxysilane, available from GE silicones.
3Diameteroperating, dostepny in the company Sartomer Company Inc.
42,2'-Azo-bis(2-methylbutyronitrile), available at company E. I. duPont de Nemours & Co., Inc.
5Mn soluble part; the polymer in tetrahydrofuran completely insoluble.

Examples 1, 2 and 3

Acrylic-silane nanofibres

Example 1

Solution of acrylic-a silanol resin from example (8.5 grams) was mixed with polyvinylpyrrolidone (0.2 grams) and water (1.5 grams). The formulation was stored at room temperature is over 215 minutes. Part of the resulting formulation was loaded into a syringe to 10 ml using a syringe pump with a flow rate of 1.6 ml per hour was applied to the mouthpiece (a stainless steel tube with an outer diameter of 1/16 inch (1,59 mm) and an inner diameter of 0.010 inch (0.25 mm)).

This tube is connected with the grounding aluminum manifold through the high voltage source, to which was applied a potential of approximately 21 kV. The supply tube and the collector was made in the case, a nitrogen blowing which made it possible to withstand a relative humidity of less than 25%. On a grounded aluminum panels gathered ribbon-like nanofibers, having a thickness equal to approximately 100-200 nm, and the width in the 500-700 nm, which was characterized by optical microscopy and scanning electron microscopy.

Example 2

Solution of acrylic-a silanol resin from example In (8.5 grams) was mixed with polyvinylpyrrolidone (0.1 gram) and water (1.5 grams). The formulation was stored at room temperature for 210 minutes. Part of the resulting solution was loaded into a syringe to 10 ml using a syringe pump with a flow rate of 0.2 ml per hour was applied to the mouthpiece of example 1. Conditions for electroprecizia were the same as described in example 1. On a grounded aluminum foil gathered ribbon-like nanofibers having is the thickness of 100-200 nm and a width of 900-1200 nm, which was characterized by optical microscopy and scanning electron microscopy.

Example 3

Acrylic-silane resin from example A (8.5 grams) was mixed with polyvinylpyrrolidone (0.1 gram) and water (1.5 grams). The formulation was stored at room temperature for 225 minutes. Part of the resulting solution was loaded into a syringe to 10 ml using a syringe pump with a flow rate of 1.6 ml per hour was applied to the mouthpiece described in example 1. Conditions for electroprecizia were the same as described in example 1. On a grounded aluminum foil gathered ribbon-like nanofibers, having a thickness of 100-200 nm and a width in 1200-5000 nanometers, which are characterized by the methods of optical microscopy and scanning electron microscopy. Sample nanofibers for two hours, dried in an oven at 110C. any measurable mass loss was observed. It shows the complete schiesty nanofibers.

Despite the above, for purposes of illustration, the description of specific embodiments of the invention, the experts in the relevant field of technology should be obvious that without deviating from the invention defined in the attached claims, can be implemented with numerous variations of the details of the present invention.

1. The way ele is troparia fibers of the electrically conductive polymer solution in the presence of an electric field between the mouthpiece and the grounding source, in which the polymer before and during the process electroprecizia subjected to the crosslinking reaction, and the polymer contains stitched silane group on the length of the main chain of the polymer, and the stitching groups react with water, including water contained in the air.

2. The method according to claim 1, wherein the polymer is a (meth)acrylic polymer.

3. The method according to claim 1, wherein the polymer is a (meth)acrylic polymer having a silane group.

4. The method according to claim 1, wherein the polymer in addition to the existing link group also includes groups selected from carboxyl and hydroxyl.

5. The method according to claim 1, wherein the polymer has a silane group, carboxyl group, hydroxyl group and the nitrogen-containing group.

6. The method according to claim 1 in which the silane groups in the polymer are present in a quantity ranging from 0.2 to 20 wt.% silicon in the calculation on the total weight of the polymer.

7. The method according to claim 5, in which the polymer contains, wt%:
(a) from 0.2 to 20 Milanovich groups, as measured by the silicon,
(b) from 1 to 45 carboxyl groups,
(c) from 0.5 to 6.5 hydroxyl groups and
(d) from 0.2 to 5.0 nitrogen-containing groups;
while the percentage by weight gain in the calculation on the total weight of the polymer.

8. The method according to claim 1, in which the solution contains a thickener.

9. The method according to claim 8, in which the thickening agent is polyvinylpyrrolidone.

11. The fiber obtained by the method of electroprecizia containing polymer which sew before and during the process electroprecizia, when this fiber contains knitting-Si-O-Si-.

12. The fiber obtained by the method of electroprecizia, according to claim 11, having a diameter in the range from 5 to 5000 nm.

13. The fiber obtained by the method of electroprecizia, according to claim 11, which represents a crosslinked (meth)acrylic polymer.

14. The fiber obtained by the method of electroprecizia, according to claim 11, which represents a (meth)acrylic polymer containing a crosslinking-Si-O-Si-.



 

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4 cl, 3 dwg, 2 tbl

FIELD: machine building.

SUBSTANCE: line consists of extruder, of unit of first broach, of device for thread cooling, of thread directing elements, of unit of second broach and of cut-off mechanism. Also, the line consists of a directing support element. The cut-off mechanism is positioned behind the support element. The thread cooling device is installed between the unit of the first and the second broach. Thread is laced-up S-like into upper and lower rollers in the first unit of broach. The upper roller is driven. The elements of thread direction in the device of thread cooling transfer thread in linear motion through the unit of the second broach and the directing support element to the cut-off mechanism.

EFFECT: arrangement of compact lines of high efficiency for fabrication of qualitative fibre.

12 cl, 8 dwg

FIELD: equipment for cooling of polymer molded threads.

SUBSTANCE: apparatus is adapted for cooling of threads delivered from spinnerets of spinneret set positioned in spinning shaft. After molding of threads from polymer melt, threads are drawn downward and wound. Cooling pipe connected to spinneret set is made perforated to form sieve for passage of cooling air from the outside into inside. Threads may be drawn through said cooling pipe. Cooling pipe 4 includes at least one pipe 7 perforated to form sieve and adapted for admission of cooling air. At least one adjustable closing ring 9 is arranged on inner or outer side of perforated sieve-like pipe 7 for preventing cooling air from discharge.

EFFECT: fast and effective coordination of cooling pipe with thread cooling conditions.

3 cl, 3 dwg

FIELD: production of complex chemical filaments.

SUBSTANCE: method involves producing by known method of filament with linear density of 0.05-0.17 tex by wet or dry-wet forming and winding onto winder with winding being combined with twisting operation; after forming and twisting processes, unwinding filaments from winder and joining into yarn with following stretching, finishing, drying and winding onto bobbin. Yarn may include from 5 to 30 filaments with linear density of 5-200 tex. Each of filaments from which yarn is composed is preliminarily stretched during forming procedure. Method allows complex chemical filaments with lower linear density to be produced.

EFFECT: stabilized process for manufacture of thin chemical filaments with reduced linear density and improved quality of filaments.

4 cl, 2 dwg, 5 ex

FIELD: production of complex chemical filaments.

SUBSTANCE: method involves producing by known method of filament with linear density of 0.05-0.17 tex by wet or dry-wet forming and winding onto winder with winding being combined with twisting operation; after forming and twisting processes, unwinding filaments from winder and joining into yarn with following stretching, finishing, drying and winding onto bobbin. Yarn may include from 5 to 30 filaments with linear density of 5-200 tex. Each of filaments from which yarn is composed is preliminarily stretched during forming procedure. Method allows complex chemical filaments with lower linear density to be produced.

EFFECT: stabilized process for manufacture of thin chemical filaments with reduced linear density and improved quality of filaments.

4 cl, 2 dwg, 5 ex

FIELD: production of complex chemical filaments.

SUBSTANCE: method involves producing by known method of filament with linear density of 0.05-0.17 tex by wet or dry-wet forming and winding onto winder with winding being combined with twisting operation; after forming and twisting processes, unwinding filaments from winder and joining into yarn with following stretching, finishing, drying and winding onto bobbin. Yarn may include from 5 to 30 filaments with linear density of 5-200 tex. Each of filaments from which yarn is composed is preliminarily stretched during forming procedure. Method allows complex chemical filaments with lower linear density to be produced.

EFFECT: stabilized process for manufacture of thin chemical filaments with reduced linear density and improved quality of filaments.

4 cl, 2 dwg, 5 ex

FIELD: production of synthetic materials from thermoplastic substances and mixtures thereof, including high-quality commercial raw material and various kinds of municipal and industrial wastes of thermoplastic materials.

SUBSTANCE: apparatus has rotating hollow reactor made in the form of hollow toroid with outer and inner shells having spherical upper parts. Such construction provides reduced heating of reactor. Spinneret is mounted inside reactor on its shaft. Fibrous materials produced by means of apparatus may be used for manufacture of sorbents for catching of oil or oil products from water.

EFFECT: simplified construction, enhanced reliability in operation, reduced heat losses and improved quality of filaments.

16 cl, 4 dwg

FIELD: chemical industry; method of production of extruded cellulose continuously molded bodies.

SUBSTANCE: the invention presents a method of production of extruded cellulose continuously molded bodies from a spinning solution consisting of cellulose, water and tertiary aminoxide. To improve textile properties of extruded continuous molded bodies, as compared with existing level of engineering, the invention provides, that between an extrusion aperture of the die and the product removal device the continuous molded body is transported by a conveyor practically without stretching. At that it is preferable, that the speed of the intermediate conveyor motion should be less than the speed of extrusion and the speed of the product removal device. Due to these measures it is possible to improve considerably such textile properties as strength in a loop and a tendency to fibrillation.

EFFECT: the invention ensures improvement of textile property of extruded continuously molded bodies such as strength in a loop and a tendency to fibrillation.

34 cl, 5 dwg

FIELD: production of synthetic materials from thermoplastic substances and mixtures thereof, including high-quality industrial wastes, and also various kinds of domestic and industrial thermoplastic material wastes, in particular, may be used for producing of sorbents for catching of petroleum and petroleum products from water.

SUBSTANCE: apparatus has plate with detachable cover equipped with central opening where slider bearing for reactor shaft is mounted, inlet branch pipes adapted for feeding of melt into reactor and mounted within detachable cover, and rotating hollow reactor provided with spinneret and made in the form of truncated cone whose open part, that is, diverging cone and truncated cone of reactor are continuously joined to one another. Cylindrical rods having diameter D are serving as spinneret and spaced apart by equal gap L from each other to thereby allow separation of melt film into equal filaments of substantially equal cross-section Di. Heater is made in the form of truncated cone and arranged coaxially to reactor in spaced relation thereto. Also, rear side of heater is protected by heat-insulating sleeve of refractory ceramics to facilitate maintaining of working temperature mode within reactor, provide predetermined temperature of melt film and substantially eliminate destruction thereof to thereby increase quality of resultant filament.

EFFECT: simplified construction, enhanced reliability in operation, improved quality of filaments and increased efficiency of reactor.

9 cl, 5 dwg

FIELD: production of fibers from thermoplastic material, such as fiberglass.

SUBSTANCE: system comprises at least one spinneret cooperating with at least one stapling machine, fiber and/or filament smoothing device for smoothing of fibers and/or filaments exiting from spinneret, at least one discharge device, supporting platform, device for displacement and positioning of stapling machine to at least two positions: above supporting machine and under supporting machine, and first opening provided in supporting machine and adapted for passage of stapling machine therethrough. Said devices and supporting platform are arranged as continuation of each other. System is further provided with device for separating fibers before they are fed into stapling machine and member for closing of first opening, in particular, in case stapling machine is under supporting platform. Displacement device has horizontal axis around which stapling machine may be moved between first and second positions.

EFFECT: increased efficiency, prolonged service life of each stapling cylinder, improved quality of end product and decreased manufacture costs.

10 cl, 2 dwg

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