Insulating material

FIELD: electrical engineering.

SUBSTANCE: proposed insulating material that can be effectively used to insulate conductors for various industries, including radio engineering, cable industry, microelectronics, and the like, has multilayer structure of N thin-film layers, where N > 1; all layers are made of separate piled films produced from same material and by same method, having actually equal thickness d < 25 μm.

EFFECT: facilitated manufacture, reduced cost of materials used, enhanced electric and mechanical strength.

1 cl, 1 dwg, 2 tbl

 

The invention relates to electrical engineering, namely the dielectric materials which can be effectively used as insulators, electrical conductors, used in various industries, in particular in the radio industry, cable industry, microelectronics, etc.

There is currently a wide range of electrical insulating materials, distinguished by its physical structure and chemical composition.

It is known, in particular, the use as dielectric materials in a single layer of massive blocks, plates or films of the classic polymers having dielectric properties, in particular, polyimides, fluoropolymers, polyethylene, polystyrene, polyethylene terephthalate, and others (see Reference electrical materials, Ed. by Uwhich and other Meters: Energy, 1974, volume 1, 584 C.). The feasibility of using a specific polymer is determined depending on operating conditions of the material, as well as the impact of external loads or aggressive environment. The disadvantages of the known single-layer block and a film of polymeric materials are relatively low strength characteristics. The magnitude of the breakdown voltage of these materials is 0,15-0,30 kV/μm, and the amount of mechanical about the activity on the gap - 20-400 MPa.

Also known composite insulating materials on the basis of various textolite (usually fiberglass), nonwoven composites based on different fibers (fiberglass, bazaltovolokno and others), as well as filled polymers.

In particular, in patent RU 2111568 C1, H 01 B 3/00, Tenenbaum and others, publ. 20.05.1998 described single layer of insulating material containing a thermoplastic copolymer, sooty carbon as a conductive filler and a ferroelectric barium titanate as the inorganic filler, with specified polymer composite material can be further crosslinked by ionizing radiation.

In the patent RU 2029998 C1, H 01 B 3/00, Institute of ELPA, publ. 27.02.1995 described single layer of insulating material in the form of a tape made plain weaves a complex twisted glass threads, the main thread combined with high-modulus synthetic fibers, and synthetic and glass yarn taken at a certain ratio of their linear densities.

In the patent RU 2032949 C1, H 01 B 3/48, Kiba and others, publ. 10.04.1995 described single layer of flexible insulating material with high elasticity, electrical and mechanical strength on the basis of impregnated epoxy-bonded fabric, made of basalt crucen the x filaments with a diameter of less than 9 μm, linear density based 100-250 Tex × 1×2, duck 100-250 Tex × 1×4 multilayer weave thickness of 1-3 mm

In the patent RU 2043446 C1, H 01 B 3/52, NPOST "Syntex", publ. 10.09.1995 described multilayer insulating material made of one or two layers of insulating paper on the basis of polyaramid threads hibrido and blends of polyester fibers with different linear density, and a layer of polyester film, which is connected via a connecting layer or layers of insulating paper. As binders it is proposed to use a mixture of polyester and epoxy resin at a ratio of 1:5-5:1, with the possible addition of hardener.

The above described insulating materials can be obtained with the use of sophisticated technological methods, but their electrical and mechanical strength slightly higher than the above-mentioned single-layer materials on the basis of classical polymers.

Closest to the claimed insulating material is known from patent US 5300364, 32 In 15/08, Hase et al., publ. 05.04.1994 having a multilayer structure made of N layers of thin films, where N>1. In known insulating material layers have different thicknesses, which must meet certain what the rate, which includes also the coefficients of thermal expansion of each layer. Each layer serves to perform from the polyimide film.

Known material, as described earlier, is characterized by a rather complex technology of its production because of the requirement for the selection of layers, each of which has a strictly individual, different from the other layers, characteristics. Thus, to achieve a significant increase in electric and mechanical strength as compared with other known materials (based on classical polymers and composites) in a known material fails.

The present invention is to create a new insulating material, characterized by a simpler manufacturing technology at significantly lower cost of used materials than those in the prior art, and at the same time significantly larger values of electrical and mechanical strength.

This task is solved in that the insulating material having a multilayer structure made of N layers of thin films, where N>1, according to the invention, all the layers are made from a single homogeneous films of essentially equal thickness d<25 μm, the joint in the foot.

Under a foot in the framework of the present invention should be understood a lot of launoy structure, with the bottom layer, top layer and, when N>2, intermediate layers, each of which is posted by any known method in the near to it from the bottom layer. Under the same type should be same film obtained from the same material in the same way. The ideal situation, when all of the films prepared from the same material in the same way, are absolutely identical in size and physical properties, in the framework of the present invention is desirable, but in practice difficult to achieve, that is why films are characterized as similar and having essentially equal thickness. The characteristic of "individual" in relation to the film that forms the foot, implies the absence of any relationship (physical or chemical) between every two adjacent films.

The present invention is based on the authors found an unexpected effect of high and ultra-high gain inherent in solids and polymers physical characteristics in the multi-layer structure composed of separate homogeneous films of essentially equal thickness d<25 μm, the joint in the foot. In particular, when placing individual of the same type on the chemical composition of the films is essentially equal thickness less than 25 microns, having dielectric properties, the stop value of the breakdown electric n the voltage and mechanical strength of the obtained laminated material is increased in comparison with known materials by several orders of magnitude. With this configuration, the film does not matter.

The essence of the invention and the possibility of achieving the claimed technical result is explained hereinafter with specific examples of its implementation with regard to the attached drawing, which shows graphs of the durability of the constant voltage gap to a single-layer film and a multi-element films (feet) polymethylmethacrylate (PMMA) at the test temperature of 293 K.

Figure 1 presents comparative data on the durability of the films of polymethylmethacrylate (PMMA). Curve 1 indicates the durability of the multi-element film (feet) PMMA total thickness of 90 μm, formed by N=10 individual homogeneous PMMA films of equal thickness (d0=9 μm), and curve (2) singleton film PMMA thickness d0=90 μm. From these data it is seen that the multi-element film (foot) PMMA has a significantly larger value of durability. Based on figure 1 time guaranteed performance (durability) mono films (at a load of 60 MPa) is 10-4sec, while the stack with the same total thickness at a load of 60 MPa, the durability is 104sec, ie, 108sec more.

Similar results are obtained for the electric durability, i.e. the time from the beginning of the electrical load to a voltage electricity is one breakdown for any of the films.

Table 1 provides data on the impact of the number of elements of the films in the multi-element structure (foot) on the ultimate tensile stress films of polyethylene terephthalate (PET). The value of the discontinuous voltage for each sample was calculated as the average of 10 measurements at the loading rate of the bursting machine W=2.9 MPa/s From table 1 it is evident, in particular, that the cut-off voltage massive mono film thickness of 145 μm is 100 MPa, while the stack of 8 thin mono films with almost the same total thickness 144 μm is 700 MPa, 7 times more. Table 1 data show that in single-element and multi-element structures one layer at a thickness of more than 80 μm, the effect of increasing values of the discontinuous voltage is not observed.

Comparative characteristics and the effect of a significant increase in electric strength for samples of PET film is shown in table 2. The value of electric strengthfor each sample was calculated as the average of 10 measurements. As can be seen from table 2, the dielectric strength of the mono film thickness of 80 μm, equal 0,26 kV/mm, and dielectric strength, recruited from 8 pieces of 10-micron films with a total thickness of 80 μm is equal to 1.6 kV/mm or 6 times higher. Table 2 shows the visible, when testing a single-element or multi-element structure with a layer thickness beyond the limitations of the present invention (80 μm) of the effect of increasing the values of the electric strength is not observed.

To achieve the effect of significantly enhancing the physical characteristics in the foot configuration films is irrelevant. A significant influence on the result has only a number of films in the foot and their thickness is more than in the foot films and less than the thickness of one film, the higher the physical characteristics of the final multilayer structure. This pattern is easy to see from the values in table 2.

Insulating material according to the invention can be obtained and used, in particular, as follows.

Selects a specified number of similar films such as plastic, in particular PTFE, polystyrene, etc. or films made of quartz, mica, and any film of dielectric material is essentially equal to the thickness of d0<25 μm. Film thickness is chosen based on the required characteristics of the final multilayer material for each specific application. It should be noted that such films are currently in a commercial way that ensures their availability and provides significant control is the communication technology of the production of the final insulating material in comparison with the prior art.

Next, the film formed in multiple layers. If, for example, it is necessary to obtain an electronic charge is small, for example, thin-film chips from a stack of books blanks are cut to the size and configuration of the future of the electronic Board. The blank cards are put into place. Further, if necessary, to the film on the bottom layer in the foot by spraying is applied to the shielding metal coating, for example, by vacuum deposition or electroplating method. On the top layer of the foot (in the case of unilateral installation) by spraying or electroplating applied conductive paths to which are soldered the radio. In the case of a typical installation of the stack bore through holes in which are inserted the conclusions of the radio. At the top of the film (plate) stacks are small conductive ring (half ring). After inserting radiokomponent, for example output resistor, capacitor, etc. is soldering the output of the element-side mounting (bottom of stack). Part of the solder getting in the ring (or semicircle) with the top of the stack (the direction of insertion of radiokomponent) remains there after solidification and thereby securely holds together without any glue film (plate) stack with each other. Installation happens to be sturdy and breakdown n is Prairie ultra, that allows you to use charge at high voltages in high voltage engineering. If the current-carrying paths should be placed on both surfaces of the Board (two-way installation), then the rings are not doing, and installation of lead on the upper and lower film stack.

Multilayer Board or any other multi-element designs have along with ultra-high electrical strength, ultra-high mechanical strength and very low value of tangent of dielectric loss angle, which allows their use in exposure of large loads and microwave ranges.

Similarly fabricate flexible printed (ribbon) cables and flexible coils.

If you want to get a heavy-duty dielectric layer in the capacitor, the foot-books cut down on the landing configuration of the workpiece and place it between the plates of the electrodes. The capacitor is ready.

To obtain the simplest heavy-duty electrical cable is also preparing a batch of N>1 layers of the film material, but in this case, the foot is prepared in the form of a multilayer tape wound on the reel drum. With reel-reel multi-layer tape is wound on a conductive core, for example, of copper wire. Then multilayer stop the top is covered, depending on the purpose of the additional protective layers of polymer or metal, for example, polyethylene or lead. In industrial conditions, the procedure for manufacturing of cables is on drawing machines. Using the multilayer insulating material fits well with the existing technological process. In General, it should be noted that any additional new equipment for the implementation of the multi-layer insulating material according to the invention is not required.

In addition, the use of multilayer thin electrical insulating materials according to the invention leads to a significant reduction of the material - in particular, to a multilayer insulator with the technical requirement of the same breakdown voltage is required several times less material, which naturally reduces the cost of the cable.

In conclusion, it should be noted that the above examples are presented only for a better understanding of the invention and its advantages, and in no way cover all possible variations in its implementation. Specialist in the art it is clear that there may be other specific variants of its realization, is not beyond the scope of the claims defined by the attached claims.

td align="center"> 6
Table 1.
Total the thickness of the multi-element patterns (stack) D NThe number of elements of the films in the multi-element structure (stack) NThe average breaking stress, MPa
145 microns1100
290 mcm2100
580 microns4100
1160 μm8100
18 microns1430
36 microns2450
72 microns4500
144 mcm8700
Table 2.
The total thickness of the multi-element patterns (stack) DNThe number of elements of the films in the multi-element structure (stack) NThe average value of voltage electrical breakdown, kV/MM
3 microns11,4
6 mcm21,9
9 µm32,8
33 microns114,5
10 µm10,91
20 mm21,15
30 µm31,23
60 micron1,4
80 microns81,6
20 mm10,5
40 microns20,6
80 microns10,26
160 microns20,26

Insulating material having a multilayer structure made of a thin film, characterized in that it is made of separate films obtained from the same material in the same way essentially equal to the thickness d of<25 μm, the joint in the foot.



 

Same patents:

FIELD: marking materials.

SUBSTANCE: invention relates to pigmentation and compositions for use in laser marking, in particular UV absorbing pigment at least partly covered with synergist having general formula [Rm(SiOn)]pR'q wherein m=1-3, n=1-3, p is a number equal to at least 1, q=0-3, and at least one of R or R' represents substituent. When pyrolized, pigment forms black material appropriate to form label. Such pigments are suitable for fluoropolymers serving to insulate wire conductors and cables.

EFFECT: expanded marking possibilities.

20 cl, 6 tbl, 38 ex

FIELD: electronic engineering; gas panel manufacture.

SUBSTANCE: protective coating that can be used for manufacturing contact members of gas-panel strip conductors is formed on both sides of polyamide and applied by stenciling method using for the purpose dielectric composition resistant to 20-30% alkali solutions at temperature of 65 - 85oC that incorporates in its composition ethyl cellulose in the amount of maximum 9 parts by weight and organic solvent in the amount of minimum 91 parts by weight with boiling temperature of ≥ 190oC, minimal amount of ethyl cellulose and maximal amount of organic solvent being, respectively, 7.5 and 92.5 parts by weight.

EFFECT: improved rheological and protective properties of coating using proposed composition.

1 cl, 1 ex

The invention relates to the field of electrical insulating equipment, in particular the silicone composition used in the electrical industry for the production of insulating materials and for impregnation of windings of electrical machines and apparatus

The invention relates to the field of electrical engineering, in particular to compositions based on ethylene-propylene rubber, used as maguilera placeholder in electric cables and wires

The invention relates to the field of electrical engineering, in particular to compositions for the manufacture of coatings for electrical steels for magnetic circuits of electrical machines and apparatus

The invention relates to the production of insulating coatings on electrical steel used in the magnetic circuits of electrical machines, apparatus and instruments

The invention relates to electrical engineering, in particular compositions for the manufacture of coatings for electrical steels for magnetic circuits of electrical machines and apparatus
The invention relates to electronic devices and can be used in the manufacture of gas discharge display panels

The invention relates to electrical engineering, and in particular to compositions for the manufacture of coatings for electrical steels for magnetic circuits of electrical machines and apparatus

Laminated structure // 2278937

FIELD: protection devices, particularly structures to protect vehicles and stationary devices against tamper, including terroristic acts.

SUBSTANCE: laminated structure comprises solid body and protective means formed of heat-resistant material and phase-changeable material, which may absorb heat. The protective means is located in the body. Two layers of highly rigid non-metallic material and layer of porous material having compressive strength of not less than 1.5 MPa and percent elongation in compression of not less than 20% are included in the laminated structure. Heat-resistant layer is applied to one surface, namely outer surface with respect to object to be protected, of highly rigid non-metallic layer. The protective means are united in single layer and arranged on inner side of the first layer of highly rigid non-metallic material. Substrate comprising at least two layers abuts the protective means. The substrate includes the first layer made of material with percent elongation of not less than 20% and tensile strength of 100÷360 MPa and the second layer made of material with percent elongation of not less than 25% and tensile strength of not less than 370 MPa. Layer of porous material is arranged between the substrate and the second layer of highly rigid non-metallic material. All layers are covered with layer of resilient non-metallic material.

EFFECT: improved protective properties, increased bullet-proofness and resistance to arc-jet cutters.

2 cl, 2 dwg

FIELD: construction industry; domestic appliances; electrical engineering; motor-car industry; methods of production and application of the laminated composite materials with the different layers of a resin.

SUBSTANCE: the invention is pertaining to the method of production and application of the laminated composite material with the different layers of a resin and may used in construction industry, domestic appliances, electrical engineering, motor-car industry. The laminated composite material contains the carrier made out of the thermoplastic polymeric compound, the located on it intermediate layer also made out of the thermoplastic polymeric compound and the applied on the intermediate layer of the thermoreactive layer. Between the carrier and the intermediate layer there is a layer of the resin (a) with the rate of consolidation of at least 20 %. Between the intermediate layer and the thermoreactive layer there is the layer of the resin (c) with the rate of consolidation of at least 60 %. The materials of the layers are laid as the flat sheets and at the temperature of 150-300° C link to the carrier. The material possess the high degree of stiffness and impact toughness, the high quality of the surface, the fast and easy solidification.

EFFECT: the invention ensures the high degree of stiffness and impact toughness, the high quality of the surface, the fast and easy solidification.

13 cl, 1 ex

FIELD: chemical industry; methods of production of the cloth-shaped laminates with a cruciform arrangement of the layers.

SUBSTANCE: the invention is pertaining to chemical industry, in particular to the methods of production of the cloth-shaped laminates with a cruciform arrangement of the layers used for manufacture mainly of bags made out of the such material and having a shape of a pipe, or a folded laminate cloth with a cruciform-shaped arrangement of layers manufactured out of two or more linked to each other oriented films. The film(s)of the laminate representing A-component is (are) placed on one side of the laminate with a cruciform arranged layers and has (have) the main or resulting direction of orientation essentially corresponding to the longitudinal direction of the cloth. The film(s) the laminate, representing B-component is (are) placed on the other side the laminate with a cruciform arrangement of the layers and has (have) the main or resulting direction of orientation essentially perpendicularly to the longitudinal direction of the cloth. The modulus of elasticity of the A- component material being in a non-oriented state is at least by 15 % below the modulus of elasticity of the B-component material being in a non-oriented state. The A- and B-components have different thermal shrinkage along the longitudinal direction of the laminate cloth. At that the thermal shrinkage of A-component is more, than the thermal shrinkage of B-component. The bags made out of the laminate with cruciform-shaped arrangement of the layers have the thermal-welded seams with the heightened strength for delamination at an impact.

EFFECT: the invention ensures, that the film of the laminate representing A-component has a bigger thermal shrinkage, than film of the laminate representing B-component, and the thermal-welded seams of bags have the heightened strength for delamination at an impact.

22 cl, 12 dwg, 2 tbl, 1 ex

FIELD: carpet securing facilities.

SUBSTANCE: apparatus has continuous layer of foamed material including continuous lower layer of foamed material with non-sliding and non-adhesive lower surface contacting directly with floor surface, and continuous upper layer of foamed material with upper surface for contacting with lower side of covering. Apparatus is further provided with continuous thin woven layer intermediate lower layer of foamed material and upper layer of foamed material, and adhesive layer on upper surface of layer of foamed material. Adhesive layer may be layer of acrylic adhesive. According to second version, adhesive layer may be pressure-sensitive adhesive layer. According to third version, apparatus has layer of detachable paper coated with silicone, said paper layer covering said adhesive layer. Method involves providing carpet holding apparatus consisting of non-sliding and non-adhesive separate non-bound and continuous sheet with upper surface adapted for engagement with carpet lower side, and lower side adapted for preventing carpet from displacement relative to floor surface without utilization of adhesive; applying adhesive means onto upper surface of said sheet; placing said sheet between carpet and floor surface so that said adhesive means cooperates with carpet and said lower surface of said sheet cooperates with floor for preventing carpet from displacement relative to floor.

EFFECT: simplified method for operation of repositionable carpet holding apparatus, reduced production costs and increased efficiency in preventing carpet from sliding relative to floor.

6 cl, 5 dwg

Laminated plastic // 2265521

FIELD: mechanical engineering; aircraft industry; railroad construction; production of lamellar products of the constructional designation.

SUBSTANCE: the invention is pertaining to production of lamellar products of the constructional designation containing mainly glass fibers and may be used in various branches of industry, for example, in mechanical engineering and aircraft industry as a material of load-bearing panels, and also in building of railroads as a material of straps of rails butts insulating bonds. The lamellar hardware product contains the interleaving with each other impregnated with a binder layers of a skeleton glass-fiber cloth and the glass fiber strands of a roving. The maximum retention of strength of the constructional composite hardware products, in which holes are made as well as simplification of the method of production of a hardware product is achieved due to a pairwise connection with the help of a thread and a needle by a broaching method of layers of the strands of a roving and the skeleton glass-fiber cloth.

EFFECT: the invention ensures maximum retention of strength of the constructional composite hardware products and simplification of the method of their production of a hardware product.

2 cl, 1 dwg

FIELD: production of a thermostructural monolithic composite fiber-array component part.

SUBSTANCE: the invention is pertaining to the method of production of a thermostructural monolithic composite fiber-array component part, which includes two surface layers made out of a composite material, spaced one from another and the bound one with another by a set of threadlike connectors made out of a composite material. First they shape a soft structure - sandwich containing a soft intermediate core made out of a material easily penetrable by a needle and penetrable for a resin, and two outside soft filamentary fixtures. The fixtures are located on both counter sides of the soft core. The filamentary fixtures and the core of the given structure - sandwich are connected by sewing with the help of a filament forming tacks. The tacks contain the cuttings of a filament passing through the filamentary fixtures and the core. The structure - sandwich is permeated with a resin being in a viscous state. Then conduct a hardening of the resin, penetrating the structure - sandwich and remove the core. The knitting needle thread is made out of strands containing a set of not linked to each other filaments. After the operation of sewing the cuttings of the filaments passing through the filamentary fixtures and the core make the longitudinal channels inside the latter formed between the filaments passing from one of the filamentary armatures to another. The operation of impregnation is exercised so, that the cured resin can penetrate into the longitudinal channels of the through cuttings of the filaments for formation in the location of each of these channels of the a bridge made out of the resin, the opposite ends of which adjoin the resin penetrating the soft filamentary fixtures. The technical effect of the method is production of a filamentary-array monolithic composite component part without additional operations of impregnation and hardening and a preliminary impregnation of the sewing filaments. Also it is necessary to observe precise positioning of a fibrous structure in the impregnation mould and the optimal use of the mechanical characteristics of the filaments, which form the surface layers.

EFFECT: the invention ensures production of a filamentary-array monolithic composite component part without additional operations of impregnation and hardening and a preliminary impregnation of the sewing filaments.

16 cl, 5 dwg

FIELD: shaping or joining of plastics.

SUBSTANCE: method comprises applying adhesive polymeric composition on the metallic surface, molding a plastic covering on the metallic surface, and heating and pressing the metallic surface. The surface is pressed during five seconds or less, the pressure ranging from 0.01 MPa to 5 MPa.

EFFECT: enhanced adhesion between the polymeric and metallic surfaces.

4cl, 2 ex

FIELD: radio-electric engineering.

SUBSTANCE: cover is formed in form of layer on basis of fiber, placed between outer and inner layers of dielectric materials. Fiber layer along thickness is formed of several cloths of textile material of synthetic filaments with carbon cover with specific electrical, in which adjacent cloths are interconnected by inserts of given thickness on basis of dielectric connecting substance. Outer layer is made of rubber. Inner layer is made of dielectric connecting substance, containing granulated material, weakening reflection of electro-magnetic waves, in amount of 5-25% of total.

EFFECT: higher efficiency.

3 cl, 1 dwg

The invention relates to mechanical engineering and can be used in the design and manufacture of hull structures, resistant to shock loading
The invention relates to the textile industry, in particular the production of non-woven heat insulation materials, and can be used, for example, in the textile and garment industry as insulation in clothing and footwear, sleeping bags, tents, quilts etc

FIELD: radio-electric engineering.

SUBSTANCE: cover is formed in form of layer on basis of fiber, placed between outer and inner layers of dielectric materials. Fiber layer along thickness is formed of several cloths of textile material of synthetic filaments with carbon cover with specific electrical, in which adjacent cloths are interconnected by inserts of given thickness on basis of dielectric connecting substance. Outer layer is made of rubber. Inner layer is made of dielectric connecting substance, containing granulated material, weakening reflection of electro-magnetic waves, in amount of 5-25% of total.

EFFECT: higher efficiency.

3 cl, 1 dwg

Up!