Method of low-temperature moulding solid biodegradable objects

FIELD: engineering processes.

SUBSTANCE: group of inventions relates to a method of making solid biodegradable objects from wheat gluten and a solid object made using this method. Hydrated wheat gluten is in form of sticky, elastic dough. The sticky, elastic dough contains at least 8 wt % wheat gluten, where wheat gluten contains a protein primary structure. The sticky, elastic dough is moulded, obtaining a shaped object and the latter is put into a medium where conditions allow for removal of excess water from the shaped object without changing the protein primary structure of the wheat gluten. A solid biodegradable object is obtained as a result, where the said object contains at least 8 wt % gluten. The shaped object is put into a medium with temperature approximately lower than 60°C. Moulding the object involves the following operations: flattening the sticky, elastic dough, putting the sticky, elastic dough into a mould which has male and female parts, and compressing the flattened sticky, elastic dough in the mould, thereby obtaining a shaped object. The solid biodegradable object is made in accordance with methods given in subclaim 1 or 5.

EFFECT: provision for a low-temperature moulding method, which involves drying and not steaming wheat gluten, so that the protein primary structure of wheat gluten basically remains the same.

21 cl, 1 ex

 

In this patent application, the applicants represent their rights to provisional patent application entitled "Method for low-temperature molding and biodegradable products obtained using (USA, serial number 60/599 215), registered on 5 August 2004; this application is entirely incorporated in this application by reference.

The present invention relates to a method of low-temperature molding. In particular, it relates to a method of low-temperature molding, which is used to produce a solid biodegradable products from the gluten of wheat.

Waste management is one of the major global challenges today. The population growth coupled with the use of an increasing number of polymeric materials has led to the formation of extensive landfills, which are filled with materials that are not biodegradable. Attempts have been made to create a more biodegradable materials. These efforts are aimed primarily at obtaining polymers which decompose under the action of sunlight, or receive materials from starch or vegetable proteins, which decompose in a relatively short period of time under normal environmental conditions or when the temperature, humidity, and under the action of microorganis the s in composting conditions.

Bassi (Bassi) with co (U.S. patent 5665152) suggest a way to get solid inedible biodegradable materials based on grain protein. A composition including grain protein, is heated to a maximum temperature of about 80°C, to create essentially homogeneous and fluid mixture from which it is possible to produce a solid biodegradable items. This composition includes from about 20-80 wt.%, grain protein, from about 5-75 wt.%, starch, up to about 14 wt.%, water, from about 10-40 wt.% plasticizer and about at least 0.01 wt.%. a reducing agent such as sodium bisulfite, designed to destroy those present in grain protein disulfide bonds. You can also use the optional ingredients such as fillers, fibers, lubricants/agents for release forms and dyes. The composition is heated at moderate temperatures, usually with a shift, you get essentially homogeneous and fluid composition. Thus in the situation of the injection molding preferred temperature conditions of formation provide essentially complete denaturation of the protein. The reducing agents is an important component of the compositions as they radically improve the fluidity and mixing grain protein, and also serve to improve the final products of the terms of appearance, mechanical properties and moisture resistance.

RAS (Rayas) with co (U.S. patent 6045868) propose a method where the squirrel grain flour sew with aldehydes and bleach using bleach to obtain crosslinked transparent polymers which are used as packaging film. In the method using ethanol and water for extraction under acidic or basic pH, and possibly heated with or without reducing agent, to obtain a polymer, which need to whiten and sew. More specifically, the method includes the allocation of biopolymer materials from grain flour for the purpose of obtaining plastic films using solubilization in suitable solvents. After extraction of biopolymers on the basis of grain flour and sew plasticity to obtain the solution for forming the film. For the concentration of the solution, which form a film, and denaturation of the protein flour is preferable to use the heat, and only then to sew and bleach, so that during the drying of the film proteins interacted more intensively, and as a result the film has gained a lot of strength. The heating should be carried out in the temperature range from 30°C and up to the boiling point of the solution, and preferably between 60°C and up to boiling point.

Werderman (Woerderman) with co (WO 2004/029135 A2) offer gluten polymer matrix with adjustable properties the AMI material, obtained using during the process of manufacture containing polythiol molecules. The method of obtaining gluten polymer matrix comprises dispersing or mixing the gluten in the presence containing polythiol molecules, or a combination of gluten with polythiol-containing molecules in the dispersing gluten mixture. In another embodiment of the invention the method also includes an operation selection, which consists in the deposition of proteins or their fractions, for example by changing the pH of the dispersion, by changing the concentration of one of the solvents or by changing the ionic strength of the mixture. When conducting compression molding, the required minimum temperature of 100°C and a minimum pressure of 0.2 MPa (2 bar) for at least 1 minute.

Aung (Aung) (U.S. patent 5279658) proposed a composition suitable for molding from it shaped products, including flour, starch and water. Flour, starch and water are present in such amounts that the composition is stable in a certain temperature range. The composition preferably comprises 40-80 wt.%, flour, 20-60% starch and 15-25% of water. Flour and starch is produced from natural grains such as corn, rice, potato, tapioca and wheat. The composition may be in the form of granules or in any other form suitable for use upon receipt the fittings. Prepare a mixture of flour and starch, in which the particles of flour and starch have a uniform size. The mixture is heated and stirred at a suitable pressure, temperature and humidity and for a sufficient period of time so that when the pressure is reduced, the mixture expands and forms a composition which upon cooling becomes stable at a certain temperature. In phase steaming sifted mixture, water and any colors and flavors served in the extruder at a feed rate of 2-7 kg/h, the broadening of the nozzles (nozzle ratio 2:4, with single or double auger, rotating at a speed of 90-220 rpm mass of Thick mix, knead and are steamed at a moisture content of 15-35%, a temperature of 120°-220°C. and the pressure 14,06-21,09 kg/cm2(200-300 pounds per square inch). The pressure is reduced through the removal of air, which leads to the expansion of a dense mass. Extended hot dense mass of injected under pressure into the molding press with a water-cooled press-form. Extended hot dense mass quickly cooled in the molding press on the cold surface of the mold. Expanded packaging material Vistanova to the required thickness in the molding press. Then moulded packaging material can be coated with a water-repellent substance, dried in an oven and cooled in cooling is the Amer.

The purpose of this invention is the provision of low-temperature method of molding to obtain a solid biodegradable products from the gluten of wheat.

Another purpose of this invention is to provide a low temperature method of forming, which includes drying, and not steaming gluten of wheat, so that the primary structure of the protein gluten wheat remains essentially unchanged.

In General, the present invention is directed to a method of manufacturing a solid biodegradable products made from wheat gluten. Hydrated wheat gluten has the form of an adhesive elastic thick mass. Adhesive elastic thick mass includes at least 8 wt.%, gluten wheat. Adhesive elastic mass of thick molded to obtain molded products and is placed in an environment with conditions sufficient to remove excess water from the molded thick mass without altering the primary structure of the gluten protein of wheat, and get a solid biodegradable product, including at least 8 wt.%, gluten wheat. Examples of solid biodegradable articles according to the present invention include such items as containers for storage of food, food utensils, containers for beverages, boxes, toys, biological dressings, medical implants, filters and biodegradable insulation, and cargoes solid biodegradable products includes at least 8 wt.%, wheat gluten.

Additional objectives and advantages of the invention are set out in the part of the description, which is given below, and in part will be obvious from the description, or you can see them by carrying out the invention in practice. These objectives and advantages of the invention is achieved by using a combination of tools, which paid special attention in the claims.

In the present invention proposed a low-temperature method of manufacturing a solid biodegradable products made from wheat gluten. In principle, the shaped articles are subjected to the action of the environment, conditions which are sufficient to remove excess water, drying up so they become solid biodegradable products. It is desirable that some water remained in the molded product and to serve as a plasticizer. Therefore, to achieve a balance between drying outer part shapes and diffusion of water from the inner part of the latter. This balance is achievable through the use of low temperatures, and controlling the humidity of the environment, or through the use of both low temperature and low humidity. Under low temperature imply that any increase in temperature above room temperature (up to a temperature of less than approximately 60°C), it is necessary to remove excess moisture, and carried to change the primary structure of the gluten protein of wheat. In particular, it is undesirable to steamed gluten wheat (which can be proved by the swelling of the protein) or decomposing by heating. Rather, it is desirable to provide conditions under which the fitting will be dry. Therefore, a product with a soft inner part is not suitable or desirable as a solid biodegradable products, izgotavlivaemykh by the proposed method. However, the allowable superficial damage to the surface of the object resulting from the use of low temperatures, and it is clear to the expert in this field.

To implement the process necessary to start a hydrated wheat gluten in the form of adhesive elastic thick mass, which includes at least 8 wt.%, gluten of wheat, where the wheat gluten consists of protein primary structure. Used in the present invention, the wheat gluten is wheat gluten in any form known to specialists in this field. Preferably wheat gluten comprises at least 10 wt.%, gluten wheat. More precisely, the gluten of wheat comprises about 75 wt.%, protein of wheat, about 10 wt.%, starch, about 10 wt.%, moisture, about 5 wt.%, lipids and approximately less than 1 wt.%, minerals. This gluten wheat exists in the form of powder, commercially available and known under the names and Amylum 110 (it produces Aalst, Belgium) or Vital Wheat Gluten (it produces MGP Ingredients Incorporated, Atchinson, Kansas). Alternatively, industrial gluten clean fractionation of protein, suitable for this purpose also and extraction.

When wheat gluten is available in powder form, as a hydrating agent for powder gluten of wheat in the present invention can use any water solvent known to the ordinary person skilled in the art. Therefore, the hydrating agent is not limited to water, but may include various aqueous solvents. Among such solvents include (but are not limited to the following) water, dilute HCl, dilute acetic acid, dilute lactic acid, an aqueous solution of NaOH, aqueous solutions of alcohols, urea solutions, chaotrope agents, detergents, salt solutions and organic solvents, can cause swelling of the protein chains. It is preferable to use as the aqueous solvent is water. The solvent based water choose, based on the information about the conditions of mixing. For example, it may be necessary to reduce the pH to 4 or less. In such cases, you can use a diluted solution of HCl, acetic acid or lactic acid. If necessary, create an alkaline environment the selected solvent can be an aqueous solution of NaOH. E is selected strongly alkaline or strongly acidic conditions, this may affect the protein structure. Examples of aqueous solutions of alcohols include a mixture of water/alcohol, such as a mixture containing 70% ethanol or 50% propanol, but not limited to the above. If you want to break hydrogen bonds, the use of urea solutions. Example chaotropes agent is guanidine hydrochloride (guanidium hydrochloride). Detergents such as sodium dodecyl sulphate and bromide, cetyltrimethylammonium, can also serve as a water solvent. For this purpose also suitable salt solutions. You can also use other organic solvents, such as ketones, amides, m-cresol, hexafluoroisopropanol, provided that such solvents can swell the protein chain. In order powder gluten was gidratirovana and formed a sticky elastic mass of thick, must be mixed with it a sufficient quantity of an aqueous solvent. Typically, the powder gluten add from about 0.1 to ~ 0.9 mass parts of an aqueous solvent. It is more preferable to add to the powder gluten from about 0.5 mass parts to approximately 0,75 mass parts of an aqueous solvent. Any solvents can be used in combination with a reducing agent and/or oxidizing agent (such as KIO3to optimize the properties of dense mA the son.

To obtain products with desired properties to the composition is administered additional additives. For example, to gidratirovannom gluten wheat add filler. You can use any filler known to the person skilled in the art, and it is preferable to choose a filler from the group consisting of inorganic fillers, organic fillers, reinforcing fillers and organic fillers. Alternatively, you can use this natural filler, as the shells of mollusks and crustaceans, and more particularly - ground shells of crustaceans.

When necessary, enter the additives that facilitate processing. In particular, introducing additives such as brighteners, crosslinking agents and plasticizers. Specific examples of brighteners include hydrogen peroxide, ozone, calcium carbonate and barium peroxide, but not limited to. Cross-linking agents include bifunctional aldehyde; p,p'-debtor-m,m'-dinitrodiphenylamine; 1,5-debtor-2,4-dinitrobenzene; 1-fluoro-2-nitro-4-azidobenzoyl; phenol-2,4-disulfonate; α-naphthol-2,4-disulfonate; bis-(p-nitrophenyloctyl) ester of adipic acid; carboxyl-bis-(methionine-p-nitrophenyl)new ester; tartaricacid; tartari-bis-(gliclazide); succinate bis-(hydroxysuccinimide of ester); N(azionario)-γ-aminobutyrate hydroxysuccinimidyl ester; 1,3-dibromoacetone; p-azidoaniline; 1,1-bis-(diazoacetic)-2-Penilaian; 1-diazoacetic-1-bromo-2-Penilaian; bis-diazobenzene; glutaraldehyde; polietilen(h-3-12)diimide and politely, but is not limited to. More specific examples of bifunctional aldehydes include formaldehyde and glutaraldehyde. Also add plasticizers, such as glycerin and ethylene glycol.

To prevent the formation of mold on the product, add preservatives. Such preservatives include ascorbic acid, sulphites, phenols, calcium chloride, silica gel, propionic acid, acetic acid, inorganic acid, sodium azide and formaldehyde, but not limited to. In addition, for some applications it is desirable to add a fungicide. If the product must meet certain requirements, if necessary add pigments, UV stabilizers and antioxidants.

In an alternative embodiment of the invention the hydrated wheat gluten is mixed with a biodegradable polymer, thus receive adhesive elastic thick mass. Examples bioresearch polymers include polylactic acid or polyvinyl alcohol, but are not limited to them. In the formation of adhesive elastic thick mass of at least 8 wt.% gluten wheat is mixed with a biodegradable polymer and water (if necessary). More t is a rule of proportion of gluten, wheat, polymer and water pick up to provide education adhesive elastic thick mass, which includes at least 8 wt.% gluten wheat.

After receiving adhesive elastic thick mass it is given the desired shape. Of adhesive elastic thick mass is formed into shaped articles by any method known to the person skilled in the art. For example, a three-dimensional shaped products are produced using the mold, which is used in conjunction with standard equipment, which is used in molding processes such as extrusion, injection molding, compression molding, blow molding. Alternatively, the molding process can be done by giving a certain form. Giving some form includes such actions as the rollers in the sheet or the rolling of a thick mass and stamping products from this thick mass. You can also use the molding press. In the molding process is obtained hydrated shaped product, which is necessary to dry, so it has become a final strength. Hydrated shaped products similar to the products from clay that still needed to burn (they are often called raw).

Regardless of the method of molding in all cases, once the dense mass of a given f the RMA, hydrated shaped article is placed in an environment whose conditions sufficient to remove excess water from the hydrated shapes without altering the primary structure of the protein gluten wheat. The conditions under which removes excess water, can be achieved either temperature control or humidity, or the control of temperature and humidity. Suitable environment allows excess water to escape from the inside of the fittings before completely dry the outer part shapes. It is desirable that some water remained in the inner part of the product and served as a plasticizer. Preferably the ambient temperature is less than about 60°C. Most preferably, the ambient temperature was less than about 25°C., in particular in the range from approximately 5°to approximately 20°C. In some cases the environment may be an environment with forced ventilation air, which promotes drying. Alternatively, also suitable environment with low humidity and a temperature of less than about 60°C. Upon completion of this stage get biodegradable product, including at least 8 wt.% gluten wheat.

As additional embodiments of the invention, if the surface has cracks on the surface of the shaped what the cause was manufactured water to initiate the disappearance of cracks. Ambient humidity is controlled so that it was possible to remove excess water without altering the primary structure of the protein gluten wheat. In the end, if necessary, to biodegradable product applied water repellent coating.

The preferred embodiment of the method of manufacturing a solid biodegradable products includes compression molding. In this process the adhesive elastic mass of thick rolled into a sheet and placed in a mold consisting of a covered and covering parts. Rolled in a sheet of thick mass is compressed in the form to obtain shaped products, which are placed in an environment with a temperature less than about 60°C., preferably less than about 25°C., and most preferably in the range from approximately 5°to approximately 20°C. it is Preferable to carry out the compression elastic thick mass at a pressure in the range of from about 0.2 MPa (2 bar) to about 2.5 MPa (25 bar).

Also covered in detail the forms are removed so that the covering part that contains a mass of thick, remains and return covering the detail form in an environment with a temperature less than about 60°C., preferably less than about 25°C., or in the most preferred range is from approximately 5°to approximately 20°C. (as al is ternative remove the covering part of the form and leave covered item placed on her thick mass.) When the dense mass takes the form, it is removed from the low-temperature environment and re-placed on a mass of thick covered the detail form. Then remove the covering part of the form and leave covered in detail form posted on her thick mass. Then covered the detail of the return form in the low-temperature environment until the dough will not form. After removal of the covered parts of the low-temperature environment covering part of the form is placed on a covered item form, so now it contains a mass of thick, covered part of the form is removed and the covering part form containing a mass of thick, return in a low-temperature environment. These operations repeat until the dough becomes dry to the touch. At this point covered in detail and covering part of the form is removed and the fitting (similar to raw) is placed in a low temperature environment up until the fitting does not stop responding to touch.

Alternatively, before compression elastic thick mass, before placing the latter in the form of thick paste is put in an environment with a temperature less than about 60°C., preferably less than about 25°C., or in the most preferred range is from approximately 5°to approximately 20°C and preferably at approximately 1 hour when there is no air circulation. What is s to prevent the formation of cracks during this process, on the fitting applied water. In the low temperature environment air circulation, which improves the drying of the product.

Solid biodegradable articles of the present invention are completely decomposed biologically and reach their full strength at temperatures below 60°C. in Addition, when in the original dense mass contains no additives, products safe for consumers. At least, solid biodegradable articles include at least 8 wt.% gluten, wheat, and primary structure of the protein gluten wheat intact.

EXAMPLE

Materials. This study used two sources of industrial wheat gluten: the first source - industrial wheat gluten [70,2% protein from whole product, taken as he is that determined by the method of Dumas (Dumas) (N × 5,7)] of the product Amylum (Aalst, Belgium), and the second source - industrial wheat gluten [75% protein (N × 5,7), as indicated in the attached manufacturer specifications] - from MGP Ingredients Incorporated (Atchinson, Kansas, USA).

The experimental part. 100 g of wheat gluten connected with about 60 g of water. The ingredients are thoroughly mixed for several minutes until the powder is gluten was not gidratirovana sufficiently, and the dense mass of gluten did not reach maximum strength (as defined by experts in chemistry of grain. After this dense mass was rolled into a sheet and wrapped around the covered parts of the cardboard shape in the form of eggs. Then a thick mass was placed conjugated covering part and the entire structure was placed refrigerator under the weight of 2,268 kg (5 pounds). After 8 hours the load was removed together with the cover part forms. In such an open form of the covered item forms were returned to the refrigerator, to give a dense mass to dry for several hours. After 8 hours the thick mass was removed from the covered items and again placed in the covering part. After following 8 hours of drying, the sample was again placed on a covered item forms for the implementation of the uniform drying. When the sample was not responsive to touch, it was completely removed from the form and return to the refrigerator for additional drying. When egg-shaped cardboard from gluten has reached sufficient strength, it was removed from the refrigerator for testing. The above procedure allowed us to obtain a sample from biobased plastic, no cracks and surface defects.

The above description is only illustrative of preferred embodiments of the invention, which can achieve these goals and implement the features and advantages of the present invention; however, not intended that the present invention is limited only by the Tim description. Any modification of the present invention, which corresponds to the entity and within the following claims should be considered as part of the present invention.

1. A method of manufacturing a solid biodegradable products, and this method includes the following stages:
a) obtaining a hydrated wheat gluten in the form of adhesive elastic thick mass, where this adhesive elastic thick mass includes at least 8 wt.% gluten, wheat and wheat gluten consists of protein primary structure;
b) forming an adhesive elastic thick mass of obtaining shaped articles and
in placing shapes in the environment, where conditions sufficient to remove excess water from this shapes without altering the primary structure of the protein gluten of wheat, where you get a solid biodegradable product, including at least 8 wt.% gluten wheat.

2. The method according to claim 1, where the shaped article is placed in an environment with a temperature less than about 60°C.

3. The method according to claim 1, where the shaped article is placed in an environment with air circulation.

4. The method according to claim 1, where forming shaped articles includes the steps:
a) rolling the sheet adhesive elastic thick mass;
b) placing rolled in a sheet of thick mass in the form of having a covered part and the covering part, br/> in) compression rolled in a sheet of thick mass in the form of obtaining shaped articles.

5. The method according to claim 4, further comprising the operation:
a) removal of covered parts of the shape, and covering a part containing a dense mass remains, and the return of the thick mass with covering part of the form in an environment with a temperature less than approximately 25°C for the period until the dough will not form;
b) re premises covered parts form a thick mass and destruction of covering the parts of the shape, and the dense mass remains on the covered parts of the form;
in return covered the details of the form posted on her thick mass in an environment with a temperature less than approximately 25°C for the period until the dough will not form;
g) re premises covering parts form a thick mass, and removing the covered parts of the shape, and covering part of the form contains a dense mass;
d) the return covering the details of the form that contains a dense mass, in an environment with a temperature less than approximately 25°C for the period until the dough will not form;
(e) repeating operations (b)-(d)until a thick mixture becomes dry to the touch;
g) removing the covered parts of the shape and covering parts of the shape with a thick mass to obtain shaped products and
C) this shapes in the environment with temperature is uroy less than approximately 25°C for a period while the fitting is no longer responsive to touch.

6. The method according to claim 5, further including the operation of the premises thick mass in an environment with a temperature less than approximately 25°C before placing the thick mass into a form having a covered part and the covering part, and where rolled in a sheet of thick mass is compressed at a pressure in the range of from about 0.2 MPa (2 bar) to about 2.5 MPa (25 bar).

7. Solid biodegradable product obtained by the method according to claim 5, where the biodegradable product contains at least 8 wt.% gluten wheat.

8. The method according to claim 1, where the environment has a temperature in the range from approximately 5°to approximately 20°C.

9. The method according to claim 1, further comprising the operation of providing air circulation in the environment with temperature sufficient to remove excess water from the shaped product.

10. The method according to claim 1, further comprising the operation of applying water on the molded product.

11. The method according to claim 1, further comprising an operation control humidity in the environment and conditions in this environment enables the removal of excess water without altering the primary structure of the protein gluten of wheat.

12. Solid biodegradable product obtained by the method according to claim 1, where the solid biodegradable product contains at least 8 wt.% gluten wheat.

13. Solid bioreclamation indicated in paragraph 12, where the solid biodegradable product selected from the group consisting of containers for storage of food, food utensils, containers for beverages, boxes, toys, biological dressings, medical implants, filters, and biodegradable insulation.

14. The method according to claim 1, further comprising the operation of applying a water-repellent coating on a solid biodegradable product.

15. The method according to claim 1, where the adhesive elastic thick mass includes bleach.

16. The method according to claim 1, where the adhesive elastic thick mass includes a crosslinking agent.

17. The method according to claim 1, where the adhesive elastic thick mass includes a plasticizer.

18. The method according to claim 1, where the adhesive elastic thick mass includes a preservative.

19. The method according to claim 1, where the adhesive elastic thick mass includes at least one additive selected from the group consisting of a fungicide, pigment, UV stabilizer and antioxidant.

20. The method according to claim 1, where the adhesive elastic thick mass includes a biodegradable polymer, and this adhesive elastic thick mass includes at least 8 wt.% gluten wheat.

21. The method according to claim 1, where forming shaped articles of adhesive elastic thick mass using the mold.



 

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26 cl, 1 ex

FIELD: chemical industry; ferrous metallurgy; production of the steel pipes with the polyolefin coating.

SUBSTANCE: the invention is pertaining to the field of polymer chemistry, in particular, to production of the polyolefin coating with the high dynamic resistibility to breaking at the coating of the steel pipes during their breaking and operation. The steel pipes with the polyolefin coatings consist of the core - the steel pipe, the not obligatory present intermediate foamed plastic material and the polyolefin coating; At that the polyolefin coating consists of the propylene block copolymers with the nucleating agents of the crystallization in the β-form, containing from 90.0 up to 99.9 (in mass %) links of propylene and from 0.1 up to 10.0 (in mass %) links α-olefins with 2 or 4-18 atoms of carbon, with the melt indexes within the range from 0.1 up to 8 g/10 minutes at 230°C/2.16 kg, which have IRτ of the propylene homopolymer cluster > 0.98, the coefficient of elasticity of elongation ≥ 1100 MPa and Sharpie impact elasticity at -20°C in the case of usage of the tested samples notched ≥ 6 kJ/m2, where the tested polyolefin pipe manufactured out of the propylene copolymer with the nucleating agents of the crystallization in the β-form has the critical pressure > 25 bar and the dynamic resistibility to breaking > 3.5 Mnm-3/2. The invention also presents the method of production of the steel pipes with the polyolefin coating. The steel pipes with the polyolefin coating may be used for transportation in the coastal area of such products as the crude oil or gas, or in the systems of the district centralized heat supply.

EFFECT: the invention ensures, that the steel pipes with the polyolefin coating may be used for transportation in the coastal area of the crude oil or gas, or in the systems of the district centralized heat supply.

2 dwg, 3 ex, 3 cl

FIELD: knots of bypass pipes for containers filled with medical liquids.

SUBSTANCE: device has bypass pipe and membrane pipe. Bypass pipe has first layer and second layer. First layer has to be polymer mixture. Second layer is disposed coaxial inside the first layer. Membrane pipe is disposed coaxial inside bypass pipe. Membrane pipe has outer, medium and inner layers. All the parts of device do not contain PVC.

EFFECT: improved efficiency of operation.

42 cl, 1 ex, 2 dwg

FIELD: process engineering.

SUBSTANCE: filler is impregnated with polymer binder and wound on form-building mandrel. Polymer binder with filler is solidified to allow regular descent of product from aforesaid mandrel fixed in cantilever. Filler represent threads and/or roving. In winding on aforesaid mandrel, first a solid layer with longitudinal orientation of threads or roving is wound and, simultaneously, a solid layer with transverse orientation of threads or roving is wound. Longitudinal layer is laid by continuous drawing threads and/or roving through spreading arrangement along form-building mandrel via squeezing spinneret. Transverse layer of threads and/or roving is wound directly at the squeezing spinneret outlet. Polymer binder polymerisation conditions is selected to allow solidification of product at the form-building mandrel outlet. Product descent is performed by drawing device. Proposed device comprises also filler feed unit, impregnating bath with polymer binder and device to arrange the filler. The latter represents at least one unit consisting of arrangement ring, squeezing spinneret and swivel arranged aligned with the form-building mandrel. Aforesaid swivel revolves around form-building axle. Note here that each aforesaid device is furnished with impregnating bath. Note also that product descent device represents drawing device fitted behind polymerisation chamber.

EFFECT: higher strength properties, simpler design and expanded performances.

7 cl, 1 dwg

FIELD: technological processes.

SUBSTANCE: invention may be used in production of pipes from reinforced plastics and other products. Device for continuous making of pipes from composite fiber material in the form of self-feeding holder, comprises block of sectors that forms internal surface of pipes and consists of several pairs of diametrically opposite sectors and supports installed in internal cavity of block and rigidly joined with each sector from pair, besides, each pair of sectors may execute reciprocal motion in axial direction by value of axial travel of sectors by means of driving mechanisms independently on other pairs. Number of coupled surfaces in supports is equal to number of sectors. In specified device coupled surfaces of supports and sectors in cross section are arranged in the form of circumferential arcs that have common centre on circumference with diametre that is more than diametre of transverse contour of support. Rigid connection of each support with pair of sectors is done with the help of single connection part, for instance, by means of bolt or pin. Distance along axis between two neighbouring supports is selected as more than sum of support thickness and axial travel of sectors by value of guaranteed axial gap between supports. Geometric parametres of coupled surfaces of support are arranged so that to provide for required tangential gap between two neighbouring sectors, for instance, within the limits of 0.3-0.6 mm after mechanical processing of external surface of sector block. Openings in sectors for connection elements are closed with plugs having external surface that matches external surface of sector block.

EFFECT: provision of significant increase of sector block rigidity and improvement of structure manufacturability.

4 cl, 5 dwg

FIELD: technological processes.

SUBSTANCE: internal layer made of glass-fibre plastic is wound onto holder, internal glass-fibre plastic layer is pasted, ribs and external glass-fibre layer are wound, and then thermal treatment of produced pipe is carried out. Ribs are arranged as bundles of threads, installed in annular grooves, which are produced in foam plastic layer, and fixed with internal and external layers. Thermal treatment of pipe is carried out under external pressure.

EFFECT: production of pipe made of flaky composite material of multiangular section of higher manufacturability and higher reliability of operation.

2 cl, 4 dwg

FIELD: technological processes.

SUBSTANCE: device for pipe manufacturing from composite-fiber materials consists of self-feeding holder, which consists of sectors, packers of transverse and longitudinal threads, support for pipe coming off the holder, polymer-making furnaces, which are installed along holder axis, circular template. Self-feeding holder, circular template, swivels of longitudinal threads packers are equipped with independent drives, which are connected with automatic system of control and equipped with rotation speed detectors. Method of pipe manufacturing from composite-fiber materials includes longitudinal and transverse winding on sectors of self-feeding holder of composite-fiber material that is soaked with binder, subsequent polymerisation of formed pipe layers, continuous pipe descent from holder. In the process of winding holder rotation speeds are changed, as well as speeds of circular template rotation, swivels of longitudinal threads packers rotation, pipe thickness is measured after winding of external layer from composite-fiber material and after final polymerisation. Then with the help of automatic control system rotation speeds of holder, circular template and swivels of longitudinal threads packers rotation are regulated.

EFFECT: increase of quality of reinforced pipes at the account of its thickness regulation in the process of winding.

3 cl, 1 dwg

FIELD: technological processes.

SUBSTANCE: method for continuous manufacture of pipes consists of casing with spindle and device for pipe displacement along holder. Device for pipe displacement consists of drive, pushers and pipe gripping units. Drive of device for pipe displacement is made in the form of doubled hydraulic cylinder installed in the casing with coaxial rods, which are fixed with pushers. Pipe gripping units in pushers and pushers in spindle are installed with the possibility of relative rotation.

EFFECT: expansion of device functional resources and exclusion of point loads in drive operation.

3 dwg

FIELD: construction; water supply.

SUBSTANCE: invention concerns the pipes intended mainly for construction of heat and water supply lines. The pipe contains base layer from a composite material on a basis of epoxy connecting and glass-basalt roving or the fabrics, located on a base layer of a pipe a thermal protection from elastic heat-insulating material, the exterior envelopment located on a thermal protection and made from a composite material on a basis of epoxy connecting and glass-basalt roving or fabrics, thus the ends of a base layer of a pipe are executed straight and smooth or have a threaded socket pipe and a nipple, or a socket pipe and a socket pipe, or a nipple and a nipple. Epoxy connecting of a base layer of a pipe contains a hardener on the basis of an aromatic amine, the exterior envelopment of a pipe is preliminary strained towards a tensioning, and epoxy connecting of exterior envelopments is selected from a solidification condition at temperature of 15-100°C and an elongation of hardened epoxy connecting, roving or fabrics of an exterior envelopment of 5-15%. The thermal protection is executed from at least one radially pressed elastic element. Such performance provides increase of durability and decrease in labour input of its manufacturing.

EFFECT: increase of durability and decrease in labour input at manufacturing of thermal protection for pipes.

5 cl, 7 dwg

FIELD: production methods.

SUBSTANCE: installation tubes for producing and packing, consists of tube body from one polymer slit and connected by one of the end with end element with screwed neck and drawn cap, which by stretch transporter are fed packing position, where they are packed into big portions. The slit stretch is looked like double or more stretch, which by one ore more separating knifes is cut to different stretches, which are welded in parallel planes for obtaining endless tubes and by the device for transversal cutting are cut to the tubes of necessary length. Then parallelly produced and cut tubes are organized into one big moving group and together fed to the device, which has necessary amount of arbors the rotational engine, by which they together and by step are fed to the technological positions for dressing the end elements with screwed neck and cap. After this the finished tubes are fed to the output transporter, which consists of two parallel situated cog belts with transportational prismatic guides, the gap between which is consider to the gap between arbors on the rotational disk feeding. The finished tubes are fed to the controller zones for checking, and flawless tubes are taken away from output controller by rotational inducting prismatic guides, and without gaps are fed to the tray.

EFFECT: it is provided tubes packing and producing by big portions.

30 cl, 11 dwg

FIELD: production methods.

SUBSTANCE: method of tube producing includes the nonstop material rolling from traversing mechanism to arbor and moving of the tube on it through the polymerization chamber to the direction of output. Producing of the tube is made with dashed moving on the arbor by hydro-pusher and reciprocative moving of the traversing mechanism. The moving of the hydro-pusher is done with speed two times more then the speed of the traversing mechanism.

EFFECT: method led to exceed the list of polymer tube products and provides the solid spiral winding of the material.

5 cl, 2 dwg

FIELD: mechanical engineering.

SUBSTANCE: device comprises mandrel, member for filling the mandrel with a filler, polymerizing furnaces, and support that are mounted on the base. The support is made of a pillar secured to the base, race, and ring mounted inside the race. The race and ring are mounted for permitting rotation with respect to the vertical axis of the device. The race is provided with supporting rollers that are in a contact with the outer side of the ring and face rollers that are in a contact with the ring surfaces. The bearing roller underlies the ring and has a drive for forced rotation with a controlled speed of rotation. The axis of rotation of the face rollers are arranged tangentially to the ring. The supporting outer roller may be arranged from the side or from the top of the ring. The drive for forced rotation is connected with the bearing roller through the clutch with the variable torque. The race receives the pickups of longitudinal movement of the pipe. The signals from the pickups are transmitted to the controlled drive and clutch through the control system for measuring velocity and torque. The face rollers may be connected to the flexible plates and the plates may be provided with pickups of direction and value of the axial loading acting on the ring from the side of the mandrel with pipe. The device may be provided with the drive for forced rotation of the race with the ring with respect to the vertical axis of the device . The signal from pickups of axial loading is transmitted to the drive of the forces rotation of the race with ring through the control system.

EFFECT: enhanced efficiency.

6 cl, 4 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention can be used in production of carrying members of filters, fittings of metal-plastic pipes, spatial reinforcement members of reinforced concrete articles, etc. According to proposed method, wire spiral is uniformly wound at preset pitch on longitudinal wire members arranged uniformly over circumference of mandrel and is welded by roller electrode with crossed over longitudinal wire members in process of winding. Position of electrodes is adjusted by opposite longitudinal displacement. Speed of displacement is adjusted continuously either manually, or automatically. Automatic adjustment is done taking into account readings of support electrode wear sensor connected through feedback with electrode shifting mechanism.

EFFECT: provision of stability of diameter over length of skeleton at its manufacture, reduced labor input, provision of high accuracy of skeleton diameter, stable strength of welded joints over length of skeleton.

3 cl, 5 dwg

FIELD: technological processes.

SUBSTANCE: invention is related to production of mechanical rubber goods. Method for production of mechanical rubber goods consists in installation of die mold in vertical vulcanising boiler, product billet installation in it with further moulding, supply of heat for die mold heating. As heating temperature becomes less than vulcanisation temperature by 30-35°C in one of parts of die mold fixed by sensor, electric heating elements controlled by this sensor are disconnected from heat supply. After the same temperature is achieved in another part of die mold, appropriate sensor disconnects electric heating elements of cylindrical part. After heating to the same temperature of the last part of die mold, vulcanisation temperature is established manually or automatically for all sensors, and all parts of die mold are heated by electric heating elements up to vulcanisation temperature. Then mechanical rubber product is vulcanised. Device for method realisation comprises vertical vulcanisation boiler and die mold. Electric heating elements are located on internal surface of vertical vulcanisation boiler in three points: above upper cover, along cylindrical part and under lower cover of die mold. Electric heating elements are controlled by sensors, in the form of needle thermocouples that register temperature of each part of die mold. Sensors are mounted directly on each part of die mold.

EFFECT: provision of even heating of all parts of die mold and maintenance of permanent temperature in process of mechanical rubber product vulcanisation.

1 dwg

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