Material for sealing threaded pipe joints and dispenser for a material

 

The invention relates to a material for sealing threaded pipe joints and, in particular, to use when performing plumbing-water works for the purpose of receiving sealed connection pipe. The invention relates also to a transfer material. Created material for sealing threaded joints containing a filament in the form of a multi-fiber yarn, covered with a sealing composition for sealing compounds, and placed in a distributing device from which the thread is coated may be submitted for direct overlay on the threaded area of the pipe. The dispensing device comprises a hollow body, a cap portion, which has a dispensing opening and closing means for closing the openings, and the case contains a filament coated composition. Appropriate sealing composition is Noteridae composition in paste form containing oil and a filler, optionally with other ingredients. The thread is made of polyamide or polypropylene. The technical result consists in increasing the efficiency of use as a handout device and material. 2 C. and 7 C.p. f-crystals, 8 ill.

Scope and what the sing when performing plumbing-water works for the purpose of obtaining compounds of pipes, used to supply water, production water, heating and the like, but also for use in other types of work with pipes, for example, in industrial plants. The invention also relates to a distributing device for the material.

A brief description of related technology Plumbers are well know for sealing threaded pipe connections systems, consisting of two parts, namely fiber tow and paste. Dry fiber tows usually put in a free, aspadana form, with the right amount of take and extend along the length. Tow can also be in the form of a coil wound on a bobbin, which may be deducted from the holding device with the tubular guide handout for a tow. In any case, the tow is wound around the threaded area covered by the tube fitting. Initially, the connecting part can be applied paste, and in this case the tow put through the pasta when it is wound around the connecting part, or, alternatively (or in addition to), paste should be applied on top of the tow. Pasta holds the tow in the proper place on the covered screw fitting. Then install cover screw soedinitelno> Although consisting of two parts, the system is widely used, it is unacceptable for pipes intended for drinking water supply, because the tow does not meet the standards for materials that may come into contact with drinking water. Tow has the ability to support microbial growth.

An alternative system consisting of two parts, can be used in place of a tow of polypropylene fibers, because the contact of such fibers with drinking water to Pets. However, any system, which consists of two parts, has the disadvantage of its use is time consuming and requires highly skilled, and its implementation will take some time.

Other commercially available sealing material is a tape of polytetrafluoroethylene (PTFE), which is a fibrous material. She usually has a width of about 10 mm and a thickness of the order of 0.25-0.5 mm When using the tape wound around the threaded area covered by the connecting part, using such a number of turns to provide the required thickness. Then, to complete the site, set covering the threaded part. Such a system also requires qualification is tightness in connection with the re-adjustment.

Georg Fischer Rohrverbindungstechnik GmbH of D-78224 Singen, Germany, serves to seal the set of materials, including pastes for use in conjunction with oakum, and also a material called PARALIQ RM 35 VLIES, which contains the tape in the form of a special synthetic fabric, fleece or gauze saturated paste to seal the threads. This material, like the tow, is a fiber and can be used without a tow or a single paste. Belt width is 16 mm, supplied in roll length 10 m or 25 m Tape length 25 m sufficient for 100 threaded sections 1 inch (25 mm), that is, the threads on the pipe with outside diameter of 1 inch (25 mm). Wide band less convenient for the plumber when dealing with it than tow or yarn. It imposes a certain amount of chamfer strip with a width of 16 mm, and not wound on a separate coils of a carving. The tape supply roll, not in the handout device with which the plumber could go with one hand.

In another technical field is used floss for cleaning interdental spaces, consisting of a large number of single threads, as an option, waxed, which is wound on a bobbin and is held in the dispenser device having a dispensing hole. and cuts a thread into the required pieces. Floss for cleaning interdental spaces is not sealing material or not covered by a composition suitable for sealing pipe joints. Accordingly, the thread for cleaning interdental spaces from a technical point of view cannot be considered acceptable in the field of threaded pipe connections.

A brief statement of the substance of the invention In the present invention as industrial products are created material for sealing threaded pipe joints containing a filament consisting of a large number of single yarns, coated with a composition for sealing joints and placed in a dispenser from which the thread is coated may be submitted for direct overlay on the area of the pipe with the screw thread.

The material according to the invention is more convenient to use than known materials. The thread is easy to wrap the threaded area of the pipe, it enters into the hollow screw threads. The plumber can manipulate the thread with one hand.

The term "thread", which is used in this description and in the subsequent claims, includes "thread".

The dispensing device before initial use may be sochka. It is also desirable that the dispensing device had a hole to feed the wires with a coating and a closing means for closing the orifice when the dispensing device is not in use; such closing tool must re-seal the dispensing device with provision for air for storage, at least one week, preferably for at least one month after the initial opening of the package, without a significant deterioration of the sealing composition.

According to one aspect of the invention, the sealing composition may respectively represent Noteridae composition in paste form, for example, of this type, which is known as used with a tow system, consisting of two parts, for sealing pipes, or olomolaiye sealing composition, or mastic, such polishing mastic. Such compositions are placed in sealed so as to prevent pollution and to minimize exposure to air, which can cause deterioration in the quality of the composition, for example, by drying (evaporation) or oxidation. It is desirable that the packaging was Vostokenergo is engaged in more than 2 years without significant loss of quality.

Acceptable Noteridae composition in the form of pastes contain a mixture of oil and granular filler, oil, respectively, may represent an unsaturated oil (e.g. linseed oil). Granular filler, respectively, may be selected from one or more mineral fillers (e.g. calcium carbonate), powdered polymer fillers (for example, polyethylene powder or powder of PTFE and fillers of chopped fibrous materials (e.g., chopped aramid fibers, polyethylene fibers or carbon fibers, in particular aramid fiber pulp described in U.S. patent 5068265, the rights to which are owned by Loctite, a content of which is introduced here by reference). Can be used a mixture of two or more types of fillers. The filler provides for the formation of oil paste. To increase the viscosity of the composition may be used in an increased amount of filler. Typical compositions contain oil and a filler in a weight ratio of about 20-40 parts oil and 80-60 parts of filler. The composition may also contain additional resins or plasticizers, in order to contribute to p is about oil, has some drawbacks, including limited stability in relation to its storage due to the tendency of linseed oil to oxidation. This leads to drying of the composition. To solve this problem can be used in special packaging, but packaging increases the cost of the finished product. In addition, the composition may be quickly dried after packing will open for its use. Next, Flaxseed oil, as it makes drinking water a certain flavor that is the result of seepage of oil from the composition, sealing the connection.

Therefore, in some cases it is necessary to use a different potverzhdenie oil, different from linseed oil. Silicone oil and mineral oil are two groups acceptable Noteridae oils. Silicone oil can, in particular, to provide a liquid polydimethylsiloxane listed in the GAS Registry Number 63148-9. They are, accordingly, may have a viscosity in the range from 1000 to 100,000 mPas and a molecular weight in the range from 10000 to 500000. The examples used silicone oils include polydimethylsiloxane with hydroxyl end, such as Silopren E2 from Bayer A. G., or polydimethylsiloxane Any mineral oil. Mineral oils are in General having a high molecular weight liquid hydrocarbons listed in the GAS Registry Number 8012-95-4. A suitable example is liquid paraffin. Other acceptable examples include oil and Risella oil Ondina from Shell Chemical Company.

It is desirable that potverjdeniya composition in the form of paste had a viscosity in the range from 20,000 to 500,000 mPas, in particular from 50000 to 100000 mPas.

Advantages neocoregames compositions are that (i) it can be done without any chemically active substances and therefore will have minimal toxic effects, and therefore, it is suitable in systems where the unavoidable contact with food products, and (ii) sealed connection pipe remains regulated after applying the sealing material, and without the risk of damaging the seal. In addition, potverjdeniya composition based on silicone oil or mineral oil may be required shelf life when stored without its sealed packaging.

According to an alternative aspect of the invention the sealing composition may be a curable polymer composition, more anaerobic composition, such as anaerobic composition known the te).

This composition can contain one or more reactive monomer (mainly polyfunctional and monofunctional acrylate and methylacrylate esters), fillers, stabilizers and curing components. The advantage of the curable compositions is that the mechanical strength of the pipe connections can be changed by changing the components of the composition parts depending on the particular desired application and final use of the pipe. Usually the material, which is applied curable sealing composition is not intended that it was primarily used by plumbers, but is suitable for sealing joints when performing other types of work with pipes, for example, in industrial plants.

In the case of a curable sealing composition, it is desirable that the thread with the floor was Packed in dispenser or other container, or packaging that minimizes the curing of the composition prior to its use. In the case of anaerobic sealant compositions it is desirable that the composition prior to its use remained in contact with air or oxygen.

According to another tnovyh pipe connections, includes a housing, a cap portion located inside the transfer opening and closing means for closing the orifice when the dispensing device is not in use, the housing contains a thread from a large number of single yarns, coated with a composition designed to seal pipe connections.

Thread from a large number of single strands usually has a cylindrical elongated shape, for example, in the form of single strands, which is different from the fabric, fleece or gauze. The thread thus represents a natural fibrous material or synthetic polymer, preferably a polyamide (such as nylon or polypropylene. The thread may be made of a large number of single yarns, which are used as filaments for cleaning interdental spaces (see, for example, U.S. patent 5560377 in the name of Donovan, the content of which is introduced here by reference), provided, however, that the thread is applied to a sealing composition. This thread should be soft enough to be flexible for winding around the threaded part of the pipe, as well as sufficient absorbency to absorb the sealing composition, and to have sufficient strength to videogioco element, which in the case of unsuitable threads can be cut and divided into pieces. One of the main functions of the thread is that she acted in a pipe connection as a clamp and attached threaded mechanical strength. The thread may also have a water-absorbing property, which can lead to some swelling of the material in the connection and to provide a better seal. If you want to maintain sealing contact of the material with the food product, especially with drinking water, it is desirable that the thread was not a toxic fiber.

The thread accordingly can be a staple fiber, or may contain twisted and/or matted elementary fibers or filaments. Preferably, it had a form comparable with twine or cord. Its numbering may be in the range from 500 to 5000 "decitex" (i.e. from 500 to 5000 grams per 10,000 meters of yarn), and especially in the range from 900 to 2500 "decitex".

Decitex or "dtex" is a metric unit of fiber diameter, determined by weight in grams per 10,000 meters of yarn (Encyclopedia of Polymer Science and Engineering, 2nd edition, volume 10, page 209). In the case of heavier material, for example, with 2100 decitex, it is necessary for the example 970 decitex.

No cover thread is usually wound on the reel, after which the thread in the usual way cover sealing composition to the desired content. The required content is such that provides the number of sealing composition on the yarn, sufficient for sealing threaded pipe connections. Content can be in the range of 30-70% by weight (more preferably 40-65% weight) sealing composition on 70-30% by weight (preferably 60-35% weight) yarn. The thread may have an outer coating of sealing composition or it may be impregnated or saturated with this song. Then the thread is coated usually wound in reverse order into smaller reels for use by a plumber or other consumers. It is desirable that each small bobbin housed in a compact transfer device or stored in an airtight container to move from the holding device, when it is required when using.

For short-term use, for example for the sample, the thread is coated with a composition based on linseed oil, may be wound on the spool with a cylindrical cover which covers located on coil is and can be sealed in airtight packaging, until you need to use it.

According to another alternative aspect of the invention, the thread is coated wound not on a bobbin or spool, and inside the transfer case.

A brief description of the figures Below two options for the implementation of the design transfer device for use in the present invention will be described with reference to the accompanying drawings, in which Fig. 1 presents a perspective view of the first variant of implementation of the design transfer device being in closed position; Fig.2 shows a similar view of a distributing device, but in its open condition (condition of supply); Fig.3 presents a view of the cap part of the transfer device of Fig.4 shows a view of a bobbin on which the thread having a coating designed for use inside the dispensing device according to Fig.1 or 2; Fig. 5 presents a perspective view of the second variant of implementation of the design transfer devices in the closed state;
in Fig.6 presents a similar view of the second variant of implementation of the design, but in the open state (status);
in Fig. 7 presents young the view of Fig.6, but showing the casing of the transfer device without the cap part and with a partial cutaway to show internal thread.

Detailed description of the invention
As shown in Fig.1 and 2, a distributing device according to the first variant of implementation of the design includes a housing 1 of a suitable plastic, which is attached to this form that it came bobbin 2 with a thread having a floor, which is shown in Fig.4.

Dispenser has a nozzle part 3, which is tightly fitted on the neck in the upper part of the housing 1 and the cover 4, which may be rotated from the closed position shown in Fig.1, in the open position shown in Fig.2.

The cap portion 3 has a slot 5 at the edges, which together with the housing 1 defines a dispensing opening 6 for extracting the yarn 7, having a floor, with the reel 2. On the upper surface of the cap part 3 by means of rivets 9 are attached cutting blade 8 that is designed for cutting the yarn when it is extracted in sufficient quantities, and it runs like a thread for cleaning interdental spaces.

The cap portion 3 has a rib 10, passing around her skirts, which compacted otno with the housing 1 so, that handout hole 6 when not in use, can be closed.

Bobbin has a base 11, which rests on the inside of the housing 1, and the roller 12, which passes up inside the housing 1 to the cap part 3. Thread 7 coated wound in a spiral on the platen 12 so that if necessary it can be removed.

Each bobbin after use can be discarded. The cap part 3 can be lifted from the housing 1 so that it can be removed empty bobbin and inserted a full bobbin, whereupon the cap part 3 again tightly mounted on the housing. Thus the dispensing device can be repeatedly reused.

The plumber or another user can hold the housing in one hand and pull the thread with the covering from the holes 6 at the desired length, after which the thread is cut by the blade 8. These simple and fast operation provide easy handling of the transfer device and the immediate imposition of threads coated onto the threaded pipe element.

In Fig. 5-8 presents the second version of the implementation of the design transfer device. For similar parts used similar position.

In the second variant osushestvleniu and forms a separate element, which has internal screw threads mating with the external threads 21 on the housing 1. The cap portion 13 is also made cylindrical and tightly attached to the top of the housing 1. The cap part 13 has a pass through hole 16. The saw blade 18, similar to the blade in a distributing device for threads designed for cleaning interdental spaces, stands above the cap part 13, inclined to it and is used to cut the thread with the floor.

As can be seen in Fig.8, the distributing device is not used roller similar to that shown in Fig.4. Instead, the thread is coated coiled inside the housing 1 by means of a technique of winding, which is used in the manufacture of the filament coil. The thread can be unwound from the axial channel 22 formed when laying in the case.

The first variant implementation of the design according to Fig.1-3 can also be used without the roller 12, but with the thread wound inside the method shown in Fig.8.

Some embodiments of the material according to the invention will be described below by way of example, viscosity measurements in examples 3-7 were made by Haake viscometer RC cone RK 1.2 degrees after 3 minutes at 20 revolutions per cut is nderte EN 751-2:1996 (standard UK BS EN 751-2: 1997) "Sealing materials for metallic threaded joints, in contact with 1st, 2nd and 3rd family gases and hot water."

Example 1
The sealing composition was prepared in paste form using the following materials, wt.%:
Linseed oil - 60
Plastic powder - 6
Calcium carbonate - 34
This composition is in the form of paste was deposited on a nylon thread in 2100 decitex.

100 m nylon thread was covered by its double passage through the pasty composition intended for coating, g:
Pasta - 24
Nylon thread (100 m) - 21
When this ratio was, wt.%:
Pasta - 53,2
Nylon thread - 46,8
Then the thread with the floor was wound on a bobbin transfer for subsequent use in threaded connection parts of the pipes.

Was the experimental unit, which consists of a certain number of screw threaded connection fittings steel pipe with outside diameter of 1 inch (25 mm) and 1/2 inch (12.5 mm). Thread the connecting portions are located in parallel with the note on the cone, which are commonly used in the plumbing industry. One connection was an adapter with a 1 inch by 1/2 inch (25 mm 12.5 mm). The node in the ready state, EMEA. The number of threaded connections on the node was four. This site, when he was under pressure without location in connection sealing material according to the invention, proceeded, if subjected to very low air pressure. However, when the thread with the floor had been pulled out of the transfer device and attached directly to the screw thread of the connecting parts (i.e. covered elements) by means of its winding in sufficient quantity to fill the grooves of the order of 3-5 screw threaded cuts each connecting part, and to end node connected spanning the connecting piece, then the site was subjected to air pressure up to 0.6 MPa (6 bar), leakage was absent.

It shows satisfactory function of the threaded seal according to the invention. Bobbin with the thread coated before use was Packed in airtight packaging.

Example 2
The sealing composition was prepared in paste form using the following materials, wt.%:
Linseed oil - 36
Plastic powder - 5
Calcium carbonate - 59
The composition had a viscosity of about 35000 mPas, measured by the Brookfield viscometer PVT with VA is Lanovoy thread in 2100 decitex. The thread with the floor was wound on the body transfer device. After that, she was tested as described in example 1.

Example 3
The sealing composition was prepared in paste form using the following materials, wt.%:
Silicone oil (silopren E2 from Bayer A. G.) - 32,1
Calcium carbonate - 67,9
The composition had a viscosity of about 28000 mPas.

Nylon thread in 2100 decitex was covered by its transmission through the composition to provide a coating with a content of about 52% by weight of the composition of the sealing composition. Fiber coating weight was approximately 0.45 grams per meter.

The thread with the floor was wound on the body transfer device for application to a threaded connecting part of the pipes. It does not require airtight packaging.

The thread is coated, extruded from distributing device was tested as described in example 1.

Example 4
The sealing composition was prepared in paste form using the following materials, wt.%:
Silicone oil (silopren E2 from Bayer A. G.) - 32,0
Polyethylene powder is 6.0
Calcium carbonate - 62,0
The viscosity of the composition was about 29200 mPas.

Composers is bringing by weight of 60%. The weight of the fiber coating was approximately 0.53 grams per meter.

The thread with the floor was wound on the body transfer device. It was then tested as described in example 1.

Pasty composition according to this example was subjected to accelerated aging for two months at 82oC. No loss of weight of the paste was not observed.

The thread is coated according to this example was also subjected to aging at a temperature of 82oWith samples of yarn coated bundling up in a closed plastic container or in a sealed glass container, or leave them open. Then different samples were tested regarding their ability to seal threaded pipe connections. No differences were observed between different samples and between samples subjected to aging and nepodtvergdenie aging. These tests eventually show that materials based on silicone oils optionally be stored in tightly Packed containers or packages.

Example 5
The sealing composition was prepared in paste form using the following materials, wt.%:
Silicone oil (silopren E2 from Bayer A. G.) - 32,0
Polyterephthalate 3062 mPas.

The composition was deposited on a nylon thread in 2100 decitex, as in example 3, with filling sealing composition comprising, by weight, 69%. The weight of the filled yarn was 0.7 grams per meter.

The thread with the floor was wound on the body transfer device. After that, she was tested as described in example 1.

Example 6
The sealing composition was prepared in paste form using the following materials, wt.%:
Silicone oil (silopren E2 from Bayer A. G.) - 35
Plastic powder - 14
Calcium carbonate - 51
The composition was deposited on a nylon thread in 2100 decitex, as in example 3, with the filling comprising, by weight, 63%. The weight of the fiber coating was 0.57 grams per meter.

The thread with the floor was wound on the body transfer device. After that, she was tested as described in example 1.

Example 7
The sealing composition was prepared in paste form using the following materials, wt.%:
Liquid paraffin - 60
Plastic powder - 6
Calcium carbonate - 34
Liquid paraffin is a standard product, commercially produced catalog BDH. The viscosity of the composition was 20000 mPas.

The composition was applied is as well, as described in example 1.


Claims

1. Material for sealing threaded pipe joints, including the thread in the form of a multi-fiber yarn, covered with a sealing composition for sealing compounds, and Packed in a dispenser from which the thread is coated is supplied for direct use on the threaded area of the pipe, thus sealing composition is a curable polymer composition or Noteridae composition in the form of a paste having a viscosity in the range from 20,000 to 500,000 mPas.

2. The material under item 1, characterized in that the dispensing device, in which it is Packed, prior to its initial use hermetically sealed.

3. The material under item 1 or 2, characterized in that the dispensing device into which it is sealed, has a hole for feeding yarn coated and closing means for closing the orifice when the dispensing device is not in use.

4. The material under item 1, characterized in that potverjdeniya composition in paste form contains oil and a filler, optionally with other ingredients, the oil is selected from linseed oil, silicone oils and mineral oils.

5. The material is of nowych proportions, components 20-40 weight.h. oil and 80-60 weight.h. the filler.

6. The material under item 1, characterized in that thread made of polyamide or polypropylene.

7. The material under item 1, characterized in that the weight composition contains 30-70 wt.% the sealing composition 70-30 wt.% thread.

8. The material under item 1, characterized in that the dispensing device, in which it is Packed, contains a hollow body, a cap portion, which has a dispensing opening and closing means for closing the orifice when the dispensing device is not in use.

9. Dispenser for material intended for sealing threaded pipe joints, containing a hollow body, a cap portion, which has a dispensing opening and closing means for closing the orifice when the dispensing device is not in use, the housing contains a multi-fiber yarn, covered with a sealing composition for sealing pipe joints, and sealing composition is curable polymer composition or Noteridae composition in the form of a paste having a viscosity in the range from 20,000 to 500,000 mPas.

 

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FIELD: polymer materials.

SUBSTANCE: invention relates to novel liquid molding compositions comprising water-soluble or water-foaming polymer, which can be employed to improve water and moisture resistance as well as for waterproofing operation, for instance of waterproofing of cables. Composition contains water, water-soluble or water-foaming organic polymer obtained from monomer mixture containing 25 to 90 wt % of nonomer(s) selected from group including (meth)acrylamide and (meth)acrylic acid or salts thereof; 10 to 75 wt % of nonomer(s) selected from group including C8-C30-alkylethoxylated (meth)acrylamides, C8-C0-alkyl(meth)allyl ethers and C8-C30-alkylethoxylated (meth)allyl ethers; and water-miscible organic volatile liquid. Polymer is present in the form of discrete particles with average cross dimension below 10 μm. Invention further provides a method for improving water and moisture resistance of articles and/or preventing introduction of water into interior of article by way of contacting this article with above-indicated composition. Method of imparting waterproofing to outside or internal components of a cable comprises contacting at least one internal component with liquid molding composition. Invention allows preparation of composition capable of protecting fiber-optic cable.

EFFECT: enhanced waterproofing properties.

15 cl, 2 tbl, 11 ex

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