Device and method of making band from crude fabric for use as auxiliary layer for tyres
SUBSTANCE: band made from crude fabric can be used as an auxiliary layer, cushion layer and reinforcement base in the carcass of a tyre. The band is made by saturating crude mini-fabric, which contains several separate strands, with a solvent based adhesive. The adhesive, which contains a solvent and an elastomer composition, is dried such that, most of the solvent evaporates. The elastomer composition remains, covering the fabric and forming a band that way.
EFFECT: reduced cost of making the said band, as well as improvement of its quality.
12 cl, 7 dwg
The technical field
This invention relates to a device and method of manufacturing the tape, which can be used as an auxiliary layers of the breaker and the strengthening fundamentals in the carcass of the tire, and, in particular, to a device and method of manufacturing such a tape from the harsh fabric. Such a tape can be manufactured in accordance with the size depending on the application, for example when used as an auxiliary layer with a certain number of threads.
The level of technology
To achieve the goal of strengthening the tyres in the tyre industry for a long time showed considerable interest in the construction of radial tires. An example of strengthening the foundations of the tires described in U.S. patent No. 3720569 on the name Kimble. This firming Foundation is made by passing through an extruder set of cords arranged with the required spacing between them. The cords may be coated with rubber latex by multiple impregnation before the formation of the solid strip. The advantage of such structures firming Foundation is that their use allows to improve stability on the road and increase the service life of the tire tread as in the structures of the layer with the radial location of cords, and layer structures with diagonal location of cords. However, the constructions are susceptible to damage, caused by the separation of the edges of the breaker due to insufficient bonding firming Foundation with rubber tires.
Auxiliary layers, which cover the Brecker radial tires, can be used to minimize the destruction caused by the separation of the edges of the breaker. Originally auxiliary layers were attached across the width of the strip by gluing overlap. Experience has shown that the drying process may be sticking. In addition, since the auxiliary layer is located on top of the breaker, this limits the stretching of the breaker. Moreover, with this design across the tread width of the material should be the same. As a result of such restrictions in the 90-ies of the twentieth century was developed more than a narrow strip, which was used as an auxiliary layer. This tape is spirally wound on the breaker. The tape is made by longitudinal cutting rubberized fabric. The width of this tape depends on the number of cords per inch, which for different tire manufacturers is different. It was noted that the use of such tape allows you to increase the tension in the winding due to the fact that it is not spliced. In addition, the edges of the breaker you can use additional layers of this tape, to improve the working properties of the tire. However, you shall olnine of this method depends on several technological processes/stages such as manufacturing (weaving) textile, fabric finishing to ensure reliable bonding with calendered rubber, preparation of rubber mixtures, calendering or surface treatment of rubber on the treated fabric and the longitudinal cutting rubberized fabric into strips of a certain width. The above processes are costly/time consuming. In the longitudinal cutting edges of the tape can be cut ply cords, which can cause deterioration of the tape edges. Consequently, the use of this method leads to the formation of a considerable quantity of defective material. In addition, manufactured thus the tape may have an uneven structure due to the different number of single ply cords in each band. The possibility of inaccuracies and different variances at each stage leads to the existence of excessive tolerances in the manufacturing process of tires. Finally, the addition of rubber to ensure reliable bonding fabric with rubber tires increases the overall weight of the tire.
A method of manufacturing a fabric breaker similar to the way in which perform longitudinal cutting of the fabric, in that it involves the manipulation of tissue, for example, by impregnation of the composition on the basis of resorcine-formaldehyde resins and latex to provide for the panorama bonding. However, the fabric of the breaker has significant differences: weft cord Corda was identical to the face, the fabric is ready to use for the manufacture of the breaker, as it does not require longitudinal cutting and obrezinivanie.
Due to the disadvantages inherent in the way in which perform longitudinal cutting rubberized fabric, was developed the method of manufacturing a tape used as a support layer, a single-ply cords using a crosshead extruder cross-head extruder). This method is widely known as the Steelastic® process and is demonstrated in figure 1. Using "Steelastic® process" (a device for implementing the method generally indicated by the numeral 1. the set of cords 2 and the rubber 3 is served in the extrusion head 4, where the cords covered with rubber to ensure reliable bonding with rubber tires. Thus made the tape, which contains many rubberized single ply cords. Before entering the extrusion head, the cords must be processed through the impregnation composition on the basis of resorcine-formaldehyde resins and latex to ensure reliable bonding with rubber on stage extrusion process.
The way Steelastic® process provides improved uniformity compared with the way in which perform the longitudinal cutting rubberized fabric, as eliminates the possibility of uneven longitudinal cutting and, thus, provides precise control of the number of single ply cords in the belt. In addition, this method can reduce the number of defective material in comparison with the way in which perform longitudinal cutting rubberized fabric, eliminating cutting of cords at the edges of the tape. In addition, the application of the method "Steelastic® process enables you to increase the length of the tape roll. However, the use of the extruder and the extrusion head according to this method requires substantial investment. In addition, there is dependence retrieve the tape from the stage of preparation of the rubber mixture and add/use of rubber used as a means to ensure reliable bonding with the rubber components of the tire, resulting in increases its weight and cost. In addition, the "Steelastic® process requires high pressure and temperature. Therefore, the bus industry needs to develop a method of manufacturing a tape or strip, which can be used as an auxiliary layers of the breaker and the strengthening fundamentals in the carcass of the tire, which requires less investment and is less time-consuming compared with the methods known from the level of the ISR. In addition, there is a need in the method, the application of which will allow you to make a tape with a more uniform structure in the absence of defective material. In addition, it would be desirable to obtain ready-to-use Packed (folded) tape or strip intended for use in the tire as an auxiliary layer, or to use as a breaker and strengthening fundamentals in the carcass of the tire.
Disclosure of inventions
The authors of this invention, it was found that the fluidity of the adhesive (impregnating composition) is many times higher than the yield strength of the rubber, and that the use of glue to soak single ply cords is preferred over the use of rubber used in the way "Steelastic® process. In addition, it was found that the adhesive can be applied at room temperature and ambient pressure, unlike rubber, which in the way "Steelastic® process must be submitted in a heated extruder. Thus, this invention allows to overcome the drawbacks inherent in the prior art, by creating a method that does not require the use of extrusion heads, as is the way "Steelastic® process.
In addition, the method according to this invention is not as time-consuming as known from the prior art in which perform rhodoline cutting rubberized fabric, since the method according to this invention does not require a longitudinal cutting fabric. In addition, this method is not as capital intensive as the way in which perform longitudinal cutting rubberized fabric, because it does not require the use of a calender. Moreover, the use of the method according to this invention allows to avoid inaccuracies, because it does not perform phase longitudinal cutting, and therefore practically excluded the possibility of formation of uneven patterns due to the different number of single ply cords in each band. Also, due to the fact that the method according to this invention does not contain stage longitudinal cutting, does not occur wear tape around the edges and does not cut the cords on the edges of the tape. Thus, the use of the method according to this invention leads to the formation of fewer defective material than it does in the way in which perform longitudinal cutting rubberized fabric. Finally, the total weight of the tire can be reduced, because there is no need to add rubber to ensure reliable bonding fabric with rubber tires.
Therefore, in accordance with this invention, a method of manufacturing strips of fabric. The method includes propety is the use of fabric, contains a lot of single cords, glue solvent-based, when the adhesive contains an elastomeric composition dissolved in the solvent, and drying the adhesive to a large part of the solvent has evaporated, education, thus, the tape containing fabric coated with an elastomeric composition. In the end, the tape is ready for use, can be manufactured in accordance with the size depending on the application, for example when used as an auxiliary layer with ten threads.
Brief description of drawings
Figure 1 presents a General view of the equipment used in well-known from the prior art method ("Steelastic® process") for the manufacture of strips of single ply cords used as strengthening the foundations of tires.
Figure 2 presents a view in vertical section of part of the equipment used in the method of manufacturing a tape of the single ply cords according to this invention, used as strengthening the foundations of tires.
Figure 3 presents a General view of the pressure roller according to this invention.
Figure 4 presents a General view of part of the guide roller used in the device according to this invention as a guide parts for the tape.
Figure 5 presents a General view of the final drive unit of the device shown in figure 2.
The piano is 6 presents a General view of the comb, intended for the direction of the tape according to this invention to a winding device.
Figure 7 presents a view in vertical section of the winding device according to this invention.
Detailed description of the invention
In accordance with this invention a device and a method of manufacturing strip, which can be used as an auxiliary layers of the breaker and the strengthening fundamentals in the carcass of the tire. The method according to this invention will be described with reference to the device according to this invention with reference to Fig.2-7. The tape is made from harsh "Bracero-fabric" (as opposed to "tire-cord fabric") or mini tissue, which contains a lot of single cords. Such Bracero-fabric can be produced on a loom, for example on the machine, which can be purchased from the company Jakob Muller AG, grik, Switzerland. This machine can be established for the manufacture of fabric, which has a smaller width than a traditional tire-cord fabric used in the way in which perform longitudinal cutting rubberized fabric. The width of severe tissue equal to the width of the desired auxiliary layer and is usually about 1/4-3/8 inch. This fabric can be made by locating a variety of single ply cords in the main direction. If estvo single ply cords per inch when used as an auxiliary layers or frame varies depending on the design of the cord and, for a given design, depending on the bus type and manufacturer. The weft thread is moved to cross (perpendicular) direction. The weft yarn is an elastic yarn covered with cotton. The purpose of the weft yarn is a continuous holding of a single ply cords in a predetermined close distance from each other.
Typical synthetic yarn is used as the cords according to this invention, is made from polyamides such as nylon 6,6, nylon 6, or from any of their copolymers. Alternatively, the strands may contain polyesters, aramid fiber, viscose fiber, glass or carbon, etc. Especially suitable filament for use in this invention is the thread brand T-728, which is a thermally stabilized nylon 66, which can be purchased from the company DUSA International, Wilmington, USA, Delaware. To meet the requirements of strength and durability when used in the tire industry, the threads are usually made of a high-viscosity polymers containing stabilizers, and pull with a high multiplicity of extraction with obtaining high-strength fibers, as described in U.S. patent No. 3311691.
Harsh fabric, generally designated in figure 2 by the numeral 10, is served in the device according to this invention. The device according to this breath is retenu contains the frame, equipped with multiple vertical beams 12, a pair of horizontal beams 14 and brackets 16. The harsh fabric is usually treated with an activating means for the connection of rubber with cords. Usually as the activating means for impregnation of the use composition based on resorcin-formaldehyde resins and latex. The implementation of this stage is not shown, as this is standard procedure in the industry. The treated fabric serves to guide roller 18, which can be installed as an option, depending on the distance to be covered fabric. The treated fabric is then applied to the block for impregnation, which is generally designated in figure 2 by the numeral 20. Block for impregnation contains 20 conclusion 22, the tray 24 for soaking and a mechanism 26 for lifting and lowering the tray to soak.
Through the mechanism, as described below, the fabric is dipped in a tray for soaking. As shown, particularly in figure 2, the tray 24 for impregnation contains many foster rollers 32. Rollers facilitate the movement of the fabric through the tray for soaking and provide immersion of the fabric in this tray. Rollers 32 contain many protrusions 32A, as shown in Figure 3, and the many grooves or recesses 32b, as shown in figure 3 and 4. The fabric is placed in the grooves 32b of the receiving waltz is. The pressure roller 34 is located above the middle of the roller 32 of the tray to soak. The pressure roller 34 includes numerous protrusions and recesses 34a 34b. As shown in Figure 3, the protruding portion 34a with grooves 32b of the receiving roller 32 have a mutual effect on the fabric. It should be noted that you can impregnate several strips of fabric. Fabric stripes are located on the protruding parts of the pressing rollers and the grooves of the roller tray for soaking, in order to pressout adhesive in the space between the strips of fabric as it moves through the tray to soak. Solvated, or wet, tape, indicated by the numeral 33, is shown in Figure 4 coming out of the grooves of the roller tray to soak. If you impregnate a few strips of fabric at this stage to separate strips of fabric during subsequent processing, you can use the guides rollers.
In addition, without going beyond the scope of this invention, special equipment may be amended. For example, if the tension of the fabric passing through the tray for soaking is sufficient, not necessary to use the pressure roller. In this case, the tension of the fabric should only be sufficient to hold the fabric in the recesses of the receiving roller tray for soaking. In this case you can use are appropriate to ejstvujuschij supporting element for the fabric, for example, the guide roller or glass beam.
A sealing compound, which is used in the tray for soaking, is a glue solvent-based. Such adhesives are solvent based, contains an elastomeric composition which is dissolved in a solvent, for example toluene. The elastomeric composition may, for example, to include (but not limited to listed natural rubber or natural rubber with a copolymer of butadiene and styrene or a copolymer of butadiene and styrene and polybutadiene. These substances included in the elastomeric composition can be mixed with strengthening (hardening) agent, the activating additives and/or plasticizers, depending on the needs of the end customer. The percentage of solvent in the adhesive depends on the speed with which the ply cords that travel through the device, and is typically in the range 10-30%.
Solvated, or wet, the tape is then applied to the guide roller 36 and another guide roller 38, as shown in figure 2 and in more detail in figure 4. 4 shows a view in section, showing a portion shown as an example, the guide roller according to this invention. As shown in figure 4, the notches 40 are made in the guiding roller to accommodate solvated tape. It should be noted that h is about instead of the guide rollers, intended for the direction of the tape after it leaves the tray for soaking, you can use a sleeve located around the guide roller for the tray to soak. The purpose of the use or guide rollers or bushings is holding the tape smooth and preventing its collapse when it exits, as shown in figure 2.
Solvated tape is then fed into the drying chamber 42, where it is once moved in the direction of the other guide roller 44, and then move through the drying chamber in the opposite direction. In the drying chamber, the fabric should be fixed in the same plane. This is achieved by holding the fabric in a taut position, and it is necessary to preserve the integrity of the tape. Adhesive including a solvent and an elastomeric composition, the drying chamber is subjected to drying. Drying usually takes place at a temperature of about 110°C for some time, which depends on the speed with which the harsh fabric is moved through the device. When drying a large part of the solvent is removed (evaporated). What remains is a covered elastomeric composition fabric, ready made, therefore, in the form of a tape. This tape is indicated by the numeral 46 and is shown in Figure 5. In the final paragraph is oducti as a component of Lena remains a small residual (trace) amount of solvent. The solvent may be 0,0009-5% by weight of the tape.
From the drying chamber ribbon-circulate back through the guide roller 38 to sequentially located guide rollers 46, 48 and 50 and to the drive unit, which is generally indicated by the numeral 52 and is shown in figure 2 and Figure 5. Another drive unit 54 containing the shaft 54A and rollers 54b and C, may be included in the design as an option, and it is used only if the drive unit 52 is in an unusable state. As shown in figure 2, the drive unit 52 includes a shaft 52a and gear rollers 52b and is designed to move the tape through the device. As shown in Figure 5, the node is supported by a frame 56, which contains the reference beam 58 that is designed to accommodate the tape when it is moving through the device. The reference beam feature between the two brackets 60.
The tape, which figure 6 indicated by the numeral 62, is then applied to the two pair of guide rollers 62 and 64 and to the mechanism 66, intended for placing the tape in a supporting ridge 68, as shown in Fig, 6. The mechanism 66 includes vertical supports 66A, horizontal beam 66b, and a roller s. Beam and the roll held together with end caps 66d. The tape is moved over the roller s and served to the ridge 68. The comb shown in Fig.6, similar to a comb, which is used in a known way technology is increasing cord with single yarns, designed for holding cords separated, except that the ridge is shown in Fig.6, designed to accommodate the tape has fewer teeth, and the teeth are separated from each other farther than the crest used in the known method of manufacturing a cord with a single thread. The tape is then fed to the winding device 70, as shown in Fig.7, which is supported by the frame 72, as shown in Fig.7. After reeling device the tape is fed to the coil 74 on which is wound the tape on which it is stored. Two coils are shown in Fig.6.
After the crest of the tape serves to guide wheel 76, as shown in Fig.7. A steering wheel is held in the frame 72 of the winding device with fasteners 78. From idler 76 tape serves to the other guide wheel 80. Similar guide wheels can be found in the known device for the manufacture of cord with a single thread, however, such guide wheels contain protrusions and recesses to accommodate single ply cords. On the contrary, in the device according to this invention the surfaces of both guide wheels 76 and 80 do not contain protrusions and recesses, and made smooth, in order to place the tape. Such guide wheel according to this invention is used as an option is La, to ensure that the tape remains in the desired position. As the tape moves from the guide wheel 76 to the guide wheel 80 and to the final closing (packing) of the device (i.e. to the winding device 70 is wound on the ribbon), the tension of the tape support by floating lever 82. The ends of the floating lever is rotated in the upper pivot point 84 and the lower pivot point 86. The movement of the floating lever is limited by the lower limiter 88, which prevents the collision of the floating lever with the coil. The upper pivot point 84 and the lower limiter 88 is located on the plate 90, which is fixed to the armature winding device. The guide roller 92 sends the tape to the guide device 94 through which moves the tape for submission to the final closing device.
According to this invention, since the rubber has such a fluidity like glue, thread the cord better absorb the glue than the rubber used in the prior art, because each thread the cord is dipped in glue. Thus you can get more full coverage fabric and thread cord tissue compared with the method known from the prior art. Therefore, with this invention it is possible to make a better tape than the articles is receiving, received by way Steelastic® process or the way in which perform longitudinal cutting of the tissue. While the desirable properties of the encapsulation for elastomeric compositions, such as rubber, can be obtained at high temperature and high pressure, the use of this invention allows to obtain such properties encapsulate at room temperature and ambient pressure, as this invention apply glue.
The tape according to this invention ready for use as an auxiliary layer of the tire. Used in this way, the tape is fixed directly on the bus. Single ply cords in the ribbon, then dries to stick to the rubber tires. Alternatively, as noted above, the tape can be used as a breaker or strengthening fundamentals in the carcass of the tire. The width of the tape according to this invention in the General case is about 1/4-3/8 of an inch.
The invention will be described in more detail in relation to the following example scenarios, which are presented as illustrative, not limiting the scope of the invention.
The tape was produced using the device shown in figure 2, as described above. Severe tissue unilateral weft cord tires, made of nylon 6,6, has applied through the device to the tray prior to the preliminary impregnation, where did her soaking composition on the basis of resorcine-formaldehyde resins and latex. Soaking in the tray for pre-impregnation was carried out by adding to the tank water, sodium hydroxide (NaOH) or granules of alkali, resorcinol flakes and formaldehyde. This solution contained about 6% of the solid phase. The solution was stirred for approximately 30 minutes. Then the solution was kept for about 3 hours (minimum aging time is 2 hours, maximum 4 hours). In other tank was added to the latex. Then the water is mixed with ammonium hydroxide, NH4OH, and slowly added to the latex. Then added antifoam and it all slowly shuffled. The solution contained about 35% of the solid phase. Then the solution was combined with the solution from the first tank. The combined solution before use was stirred for about 30 minutes. The fabric was soaked in this combined solution for approximately 3 seconds. The impregnated fabric was passed at a temperature of about 226°C for time, which ranged from 100 to 200 seconds. Then the fabric is submitted to different drying chamber, where it is kept at a temperature of 165°C. Then, the fabric was impregnated with a mixture of toluene (85 kg) and elastomeric compositions (15 kg) rubber-based. Toluene and an elastomeric composition was dried in a drying chamber at a temperature of 110°C. so that a large part of tolua is and evaporated. He got the tape, the width of which was1/2inches.
1. A method of manufacturing a tape of severe tissue for use as an auxiliary layer, which does the following: impregnate the harsh fabric glue solvent-based, and the adhesive contains a solvent and an elastomeric composition, and dried glue so that a large part of the solvent evaporates, and the elastomeric composition remains, coating fabric, forming thus the tape.
2. Tape manufactured by the method according to claim 1.
3. Tape according to claim 2, characterized in that the solvent is 0,0009-5% by weight of the tape.
4. Tape that can be used as an auxiliary layer containing raw fabrics, containing a lot of single ply cords coated with an elastomeric composition, and trace amounts of solvent.
5. Tape according to claim 4, characterized in that the solvent is 0,0009-5% by weight of the tape.
6. Tape according to claim 4, characterized in that the solvent is a toluene.
7. Tape according to claim 4, characterized in that the elastomeric composition selected from the group comprising natural rubber, natural rubber with a copolymer of butadiene and styrene or a copolymer of butadiene and styrene and polybutadiene.
8. Tape that can be used as an auxiliary layer containing many is estvo single ply cords, located in the first direction, and weft thread, which is located in the second direction perpendicular to the first direction, characterized in that the weft thread is an elastic thread.
9. Tape according to claim 9, characterized in that the filling thread is covered with cotton.
10. The method according to claim 1, characterized in that the tape can be used as a breaker or strengthening fundamentals in the carcass of the tire.
11. Tape according to claim 2, characterized in that it can be used as a breaker or strengthening fundamentals in the carcass of the tire.
12. The tape of claim 8, characterized in that it can be used as a breaker or strengthening fundamentals in the carcass of the tire.
SUBSTANCE: stabilising composition for resistant to atmospheric impacts halogen-containing thermoplastic resins, and polymer composition based on halogen-containing thermoplastic resins, containing said stabilising composition, which includes stabilising calcium compound representing calcium hydroxide and/or calcium oxide, whose surface can probably be modified, or calcium salt of organic carboxylic acid, or mixture of two or more such compounds at least one dye or pigment or their mixture, dye or pigment giving halogen-containing thermoplastic resin colour parameters L≤95, a=0 ± >1 or b=0 ± >1, or a=0 ± >1 and b=0 ± >1, and at least one isocyanurate, which has hydroxyl groups, content of β-diketone, or β-diketone salts, or their mixtures in stabilising composition constituting less than 0.1 wt % of all stabilising composition. Polymer compositions are obtained by mixing said ingredients and are used for manufacturing formed products.
EFFECT: obtaining coloured polymer compositions resistant to atmospheric impacts.
15 cl, 2 tbl
SUBSTANCE: invention relates to concentrate of additives for polyolefin processing. The concentrate contains polybutylene-1, polypropylene and from 5% to 6% of one or more additives. The concentrates compound a product, which can be added to various polyolefin for adding additives. Colored polypropylene fiber is prepared by mixing polyolefin with concentrate containing pigments with further moulding. The concentrates are used for volume coloring of polyolefines.
EFFECT: precisely, invention simplifies coloring stage during extrusion of polypropylene fibers.
8 cl, 2 tbl, 1 dwg
SUBSTANCE: present invention relates to the rubber industry, particularly to oil resistant rubber composition with good operational characteristics. The rubber composition is based on butadiene-nitrile rubber mixed with, wt.pts, 1.8-2.0 tetramethylthiuram disulphide, 1.4-1.6 hexachloro-n-xylol, 0.9-1.1 N-phenyl- N1-isopropyl-n-phenylenediamine and 1.0-2.0 oligomer of 2,2,4tetramethyl-1,2 dihydroquinoline, 0.9-1.1 antifatigue agent and heat stabiliser of dioctylamine(4-phenylaminophenyl) thiophosphonic acid ("Б"-26) with technical carbon, sulphur and target additives.
EFFECT: increased tear resistance and improved physical and mechanical properties of the rubber.
SUBSTANCE: present invention relates to the technology of obtaining rubber, particularly to hydrogenated or non-hydrogenated nitrile rubber, to the method of obtaining it, to a polymer composite material, to the method of obtaining it and method of making moulded objects. Hydrogenated or non-hydrogenated rubber is obtained, with molecular weight Mw between 20000 and 250000, Mooney viscosity -ML 1+4 at 100°C between 1 and 50 and polydispersity index of not more than 2.5. The polymer composite material contains not less than one hydrogenated or non-hydrogenated nitrile rubber, not less than one filler and not less than one crosslinking agent. Without adding coolefin, the nitrile rubber is subjected to metathesis in the presence of Grubbs's catalyst in an inert solvent.
EFFECT: obtaining hydrogenated or non-hydrogenated nitrile rubber with low molecular weight and narrower molecular weight distribution.
13 cl, 4 tbl, 4 ex
SUBSTANCE: invention can be applied in tire production and rubber industries for obtainment of cured stock with long-term resistance to thermal oxidation and ozone ageing. Cured rubber mix includes natural or synthetic rubber, curing substances, curing boosters and activation agents, fillers and other additives, and composition age resistor in amount of 0.5-2.0 weight parts per 100 weight parts of rubber, including colloid silicic acid as powder carrier and liquid alloy of age resistors obtained at 70-90°C and containing N-isopropyl-N-phenyl-n-phenylenediamine - 21-22.5 and ε-caprolactam - 11-14. Additionally age resistor alloy includes 2,2,4-trimethyl-1,2-dihydroquinolin polymer - 10.0-11.5, stearic acid - 10.0-11.5, protection wax - 24.0-25.5.
EFFECT: enhanced resistance of cured stock to thermal oxidation and ozone.
6 tbl, 2 ex
SUBSTANCE: method of polyvinylchloride stabilisation involves adding thermostabilising amount of mix including at least A) 0.01 to 10 weight parts of one polyalkylene glycol selected out of group including tetraethylene glycol, tetraporopylene glycol and tetraglicerine, per 100 weight parts of polyvinylchloride, and B) 0.001 to 5 weight parts of at least one metal chloride per 100 weight parts of polyvinylchloride, to indicated polymer. Additionally the mix includes at least one more additive or stabiliser. Heat-resistant polymer composition includes polyvinylchloride and thermostabilising amount of mix: A) 0.01 to 10 weight parts of at least one polyalkylene glycol of the general formula per 100 weight parts of polyvinylchloride, where: R1 and R2 are independently selected out of group including hydrogen and alkyl; R3 and R4 are independently selected out of group including hydrogen and alkyl; n is 4; B) 0.01 to 5 weight parts of at least one metal chloride per 100 weight parts of polyvinylchloride.
EFFECT: application of nitrogen-free thermostabilising mix with high efficiency, preventing heavy metal ion presence in the mix.
14 cl, 11 ex
SUBSTANCE: invention refers to lightproof and/or heat-resistant composition, method of production, to threads, fibres and/or filaments, as well as to textile product. The composition contains the following components: polyamide matrix, at least, one lightproof and/or heat-resistance stabilising agent containing, at least, one hindered functional amino group, titanium dioxide and manganese salt. Method of producing the composition consists that, at least, one lightproof and/or heat-resistance agent, titanium dioxide and manganese salt are introduced to polyamide base monomers before or with polymerisation. Threads, fibres and/or filaments are made of cast composition. Textile product contains, at least, threads, fibres and/or filaments made of above-stated composition.
EFFECT: improved lightproof and/or heat-resistance of the compositions, and textile products of high colour retention.
15 cl, 3 tbl, 8 ex
SUBSTANCE: invention refers to elastic composition for many practices, including manufacturing tyre tracks and tyre casing side plates, tyre pillows, tank liners, hoses, rollers, conveyor belts, rubber tubes, gas masks, etc. Elastic composition contains, at least, one halogenated butyl elastomer and, at least, one mineral additive with a surface modified by, at least, one organic compound, containing, at least, one hydroxyl group and one base group including nitrogen atom and chosen of protein and amino alcohol group. Tyre casing tracks made of this composition are characterised with improved mechanical properties, e.g., tensile strength, abrasion resistance, i.e. wear resistance, as well as low rolling resistance and good force transfer especially while wet.
EFFECT: production of composition for tyre tracks improving mechanical properties of the material, ensuring low rolling resistance and good force transfer especially while wet.
6 cl, 6 tbl, 6 ex, 9 dwg
SUBSTANCE: polymeric piezoresistive material contains polymer as base and additive, as polymer it contains, at least, plastyzol based on polyvinylchloride or dispersion of polyvinyl acetate or siloxane elastomer or thermoelastoplast, and as additive, material contains carbon nanopipes and/or carbon nanofibre in amount 0.1-20.0 wt %.
EFFECT: reduction of cost and simplification of material production procedure.
SUBSTANCE: thermoplastic elastomeric composition contains polypropylene, polyethylene, triple ethylene-propylene-diene copolymer, sulfur, primary and secondary vulcanisation accelerators, stearic acid and zinc oxide. Rubber crumb and bitumen are introduced into composition additionally. Combination of components in definite ratio improves rheological properties of composition and, correspondingly its processability.
EFFECT: high-strength products, of high ozone and atmosphere stability, resistance, can be practically fully utilised after expiry of product life.
5 cl, 2 tbl, 6 ex
FIELD: technological processes.
SUBSTANCE: invention is related to polymer compositions used as structural material in different fields, mostly for manufacture of safety parts of threaded pipe sections. Polymer composition includes low pressure polyethylene, fibrous filler and silicate lubricant, linear high pressure polyethylene and sliding additive on polymer basis Booster PO. Fibrous filler and silicate lubricant are short-fiber chrysotile-asbestos with length of fibers of 0.1 and 1.35 mm taken in ratio of 1:6. Sliding additive on polymer basis Booster PO consists of olefinic elastomers, ethylene copolymer and secondary vinyl copolymer, polyethylene.
EFFECT: products made of this polymer composition have increased physical-mechanical properties and operational parametres at low and high temperatures.
FIELD: technological processes.
SUBSTANCE: invention is related to technology of molded items production, in particular, to production of composite polymer materials that contain wood. Molding composition consists of polyethylene terephthalate and reinforcing component - wood material in the form of fibres. The item from the mentioned composition is produced by thermoplastic molding with extrusion or pressurised casting.
EFFECT: high quality composition material with low prime cost is produced.
27 cl, 4 tbl, 1 ex
FIELD: technological processes.
SUBSTANCE: invention is related to cured without heating binding agent composition, which is able to be mixed and cured under conditions without heating. Cured without heating binding agent composition is described, which contains the following main components: trifunctional or tetrafunctional phenol that carries one or two electron-donating groups on phenol benzene ring, coupling agent and catalyst, and trifunctional or tetrafunctional phenol benzene ring has three or four carbon positions that are able to interact with coupling agent, where coupling agent is aldehyde or xylain glycol, and catalyst content is approximately from 10-5 to 0.3 gram-molecules per gram-molecule of trifunctional or tetrafunctional phenol. Also the set is described for production of cured without heating binding agent (variants); method is described to produce moulded piece out of phenol resin that contains above mentioned cured without heating composition; moulded piece out of phenol resin that is produced by above described method; method of making sand mould for casting, which contains the following stages: (A) mixing of moulding sand, dissolvent and above mentioned cured without heating binding agent composition, and (B) casting of prepared mixture in mould, moulding and curing it under conditions without heating; sand mould for casting made by the above mentioned method; method of producing porous ceramic moulded piece, which includes the following stages: (C) mixing of ceramic powder, surface-active substance, dissolvent, phosphate and above mentioned binding agent composition cured without heating, (D) casting of prepared mixture into mould, moulding and curing under conditions without heating, and (E) baking of prepared cured item at the temperature of 600-1900°C; porous ceramic item produced by above mentioned method: method of producing ceramic moulded piece, which includes the following stages: (F) mixing of ceramic powder, phosphate (or its hydrate) and above mentioned binding agent composition cured without heating; (G) casting of prepared mixture in mould, moulding and curing under conditions without heating, and (H) baking of produced cured item at the temperature 600-1900°C; ceramic moulded piece produced by above mentioned method; method of crucible production; method of making composite material carbon/carbon; composite material carbon/carbon produced by above mentioned method.
EFFECT: reduces power consumption and simplifies production process.
24 cl, 23 ex, 1 tbl
FIELD: composite materials.
SUBSTANCE: invention relates to preparation of thermoplastic reinforced polymeric composite materials and can be used in manufacture of structural-destination plastics suitable for use in different fields of mechanical engineering and shipbuilding, in aircraft and special industries as well as manufacturing profiled parts, e.g. thin- and thick-walled casings. Material according to invention contains alternating copolymer of carbon monoxide with olefins or dienes (polyketone), 0.4-7.0%, polymer film, 30-45%, and reinforcing fibrous filler, the rest, or composite material contains 0.4-40% polyketone and reinforcing fibrous filler. Preparation procedure: polyketone and film or polyketone only are applied on fibrous filler, after which coated filler is molded at 200-230°C and pressure 2-6 Mpa, and then cooled at a rate of 0.2-0.5°C/min. Invention enables obtaining nontoxic thermoplastic reinforced materials showing unlimited vitality and lack of corrosive effects on equipment during preparation of prepregs and composite material based thereon, which favors technological effectiveness of manufacture.
EFFECT: increased adhesion of polymeric binder if filler surface at minimum content thereof, which provides compatibility of material with all commercial thermoplastics.
7 cl, 2 dwg, 3 tbl, 34 ex
FIELD: polymer materials.
SUBSTANCE: invention provides granule containing matrix of star-shaped polyamide and fibers, which granule can be obtained when performing following steps. (a) At least one matrix of star-shaped polyamide in molten state is combined with fibers selected from group consisting of continuous fibers and fibers with lengths constituting 80% granule length and preferably at least 100% granule length. Matrix of star-shaped polyamide is obtained by copolymerization of mixture of monomers containing polyfunctional compound including at least three identical reactive functional groups such as amino groups and carboxylic acid groups, in particular monomers depicted by following general formulae: X-R2-Y (IIa) and/or
(IIb), if needed, monomers of general formula Z-R2-Z (III), wherein Z represents functional group identical with reactive functional groups of polyfunctional compound; R1 and R2, the same or different, represent substituted or unsubstituted aliphatic, cycloaliphatic, or aromatic hydrocarbon radicals containing from 2 to 20 carbon atoms and optionally include heteroatoms such as nitrogen and oxygen atoms; Y represents primary amino group when X is carboxylic acid group or Y represents carboxylic acid group when X is amino group. (b) Composition obtained in step (a) is the molded into stick, which is cur into granules. Granules are used to prepare high-strength products.
EFFECT: increased strength of granules.
14 cl, 5 tbl, 10 ex
FIELD: mechanical rubber goods.
SUBSTANCE: invention, in particular, relates to a method for improving direct adhesion between adhesive-activated textile reinforcing material and activated rubber, to compositions of textile reinforcing materials, and to articles in the form of thread, cord, or cloth. Material is activated with gluing substance based on halohydroxyl or epoxide resin. As-deposited coating composition is fixed on material, imbedded into activated rubber, and cured at suitable temperature for suitable time. Coating composition contains at least one hydroxyl aromatic compound with at least two hydroxyl groups or phenol-formaldehyde resin compound and at least one polydiene.
EFFECT: increased adhesion with rubber and improved dynamic fatigue characteristics of rubber article.
58 cl, 22 tbl, 20 ex
FIELD: composite polymer biomedicine materials containing polymer binder, biocompatible filler and carbon reinforcing filler.
SUBSTANCE: claimed composition contains polymer binder, namely mixture of polymethylmethacrylate or methylmethacrylate copolymer with methylacrylate and monomer methylmethacrylate in ratio of polymer part to monomer from 1:0.3 to 1:0.5 mass pts (50-72 mass pts); peroxide initiator (0.05-0.5 mass pts): carbon continuous fibers of 200-1000 filaments made of hydratcellulose fiber of polyacrylonitrile fiber (2-10 mass pts); and hydroxyapatite as filler (25-40 mass pts). Method for production of material from claimed composition useful in manufacturing of jowl implants also is disclosed.
EFFECT: polymer material having natural bone-like properties.
3 cl, 10 ex, 1 tbl
FIELD: structural materials for chemical, space, aircraft, etc., industries.
SUBSTANCE: claimed material comprises at least two protective layers made of carbon fabric and reinforcing layer made of glass fabric impregnated with binder such as phenol-formaldehyde resin containing 3-5 % benzenesulfonic acid as curing agent. Ratio of carbon fabric layer and glass fabric layer number is 1:3-1:5. Method for material production includes impregnation of glass fabric and carbon fabric with binder and assembly to form a package, followed by curing.
EFFECT: chemical and heat resistant structural material of increased impact strength.
7 cl, 1 dwg, 1 tbl, 11 ex
FIELD: polymer materials.
SUBSTANCE: polymeric pressed composition is fabricated by impregnating basalt thread with liquid mixture of phenol and formaldehyde monomers in presence of sodium hydroxide catalyst at ratio 1:1.4:0.02, respectively, followed by polycondensation of resol phenol-formaldehyde oligomer at 90°C for 60 min at basalt thread-to-oligomer weight ratio 1:1, after which resulting material is dried for 15 min at 120°C and pressed for 9 min at 150°C and pressure 25 MPa to produce composite.
EFFECT: improved physico-mechanical properties of composites, which can be used in construction, instrumentation and mechanical engineering.
2 cl, 1 tbl, 13 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to technology of preparing elastic polymeric elements used in curable compositions and can be used in production of composites based on curable binders and reinforced with fibers for use in aircraft industry and in construction. Elastic polymeric element is in solid phase and undergoes phase transfer into liquid phase when dissolved in contact with component of polymeric matrix of curable composition. Dissolution temperature is below temperature of the beginning of gelation and/or composition setting. Element is prepared by formation of melt, extrusion, drawing, processing involving heating upon stretching, and cooling. Element is converted into substrate via stitching, binding, pinching, winding and so forth. Curable composition contains elastic polymeric element or substrate, curable polymeric matrix, and other additives.
EFFECT: improved physico-mechanical characteristics of products.
53 cl, 31 dwg, 11 tbl, 28 ex
SUBSTANCE: tyre contains at least two inserts (104) made of stitched elastomeric material radial superimposed from outside with regard to breaker construction element near outer axial edges of breaker construction element. At that, each insert contains inner, as per axis, part located between breaker construction element and tread band, insert tapers towards tyre girdle and outer, as per axis, part located between skeleton construction and respective tyre side and insert tapers towards tyre axis of rotation. Stitched elastomeric material has dynamic modulus of elasticity (E') measured at 70°C comprising less than 7 MPa.
EFFECT: increase of reliability and quality of tyre.
38 cl, 2 dwg, 2 tbl, 2 ex