SUBSTANCE: invention relates to packaging materials and is meant for sealing containers. The container sealing is made from a composite film, having a polyester film/aluminium film/polyester film symmetrical structure.
EFFECT: disclosed container sealing has corrosion resistance, high resistance to puncture and breaking.
10 cl, 3 dwg, 3 ex
The invention relates to a packaging material, particularly designed for sealing containers.
Capping, which are used for packaging food products such as dairy products such as yogurt, cheese, cheese, juices, pastes, ground nuts, dip-sandwich spreads, ready-made sauces and the like, converted to the product side must be completed with quality, suitable for use in the food industry (compliance with the statutory regulations for food products).
From WO 98/26931 known packaging materials, which are converted to the Packed product side are coated with a rough surface deposited on a substrate material, and as the substrate material applied polymer material or aluminum, or a two-layer composite materials of aluminum/aluminum, aluminum/polymer material, the polymer material/aluminum, aluminum/paper or the like.
From WO 99/29508 known partially embossed elements closures for containers under the food, made of film material, which, in particular, may consist of the following three-layer composite combinations: aluminum/paper/polymeric material, aluminium/paper/aluminum or aluminum/polymer/aluminum.
However, aluminum is resistant to pack the products, such as, for example, yogurt, processed cheese, dairy products, juices, pastes, ground nuts, dip-sandwich spreads, ready-made sauces and the like.
Therefore, these three-layer composites on converted to the Packed product side in any case, should be provided on the entire surface by coating with a quality suitable for use in the food industry (compliance with the statutory regulations for food products).
In addition, in particular, during transport, packaging, closed aluminium capping, there is a danger of so-called "Flexcrack" (cracks forming under the action of bending), which occurs mainly due to the movement of the Packed product. This raises the bends in the aluminum layer capping capacity. These curves further lead to looseness of the Packed product can go out or deteriorate.
The present invention is the creation of a composite film for packaging material, in particular capping containers, which has improved resistance to puncturing and tearing, as well as excellent resistance to packaged product.
Therefore, the object of the invention is a composite film for packaging material, in particular capping containers, characterized in that the composite film is a symmetric composite of polymeric mater is Ala/aluminum/polymer material.
In addition, this composite film facing toward the product side can have a heat sealable coating.
As the polymer material in the proposed invention the composite is applied film, preferably made of polypropylene, polyethylene, polyamide, in particular, preferably of a tough polyester.
Between the two polymer films duplicated aluminum film with application of glue to duplicate.
It is preferable to use a known adhesive for duplication-based polyurethane.
The thickness of each of the polymer films can range from 3 to 100 μm, preferably from 10 to 30 microns.
The thickness of the aluminum layer, placed between the polymer films may be approximately 3-40 μm, preferably 6 to 15 μm.
Placing aluminum foil in symmetric composite between two polymer films provides the following benefits:
The composite has an absolute corrosion resistance and quality, suitable for use in the food industry (compliance with the statutory regulations for food products). In addition, in comparison with comparable composites or structures equipped with aluminium foil on the outside, the composite has superior resistance to puncturing and tearing.
Damage due to "Flexcrack" (cracks about azusena under the action of bending) are excluded; this damage prevents the polymer film deposited on the outer sides of the composite.
In addition, the aluminum film can be printed, with the use of printing inks as possible on the outside and on the inside, since the surface with printed coated with a polymer film, and the printing ink cannot come into contact with the Packed product.
When applying the staining of printing inks for printing on aluminum foil additionally can be obtained effects matte/gloss.
In addition, the manufacture of the composite film is more economical, as compared with the known compounds, fewer expensive aluminum foil (only one film instead of the previously used as the outer film composite of the two films).
The composite film may not have embossing or, at least, to have a partial embossing, allowing the separation of cutting film, for example, in the form of capping containers. If necessary, the surface can also be performed separators. Such separators in the form of expanding partial coatings are known, for example, from WO 01/68475. But you can also use as delimiters and other partial coatings deposited by a printing method.
The invention concerns also the capping capacity, representing a composite film having a symmetrical structure of the complex of polyester/aluminum/complex polyester, as a complex polyester preferably used polyethylene terephthalate (PET).
Below the invention is explained in more detail using the embodiments, examples, comparisons, and preferred embodiments of the proposed invention the composite film.
As a preferred variant implementation of the invention composite films figure 1 shows the capping 1 capacity of symmetric composite film consisting of a complex of the polyester/aluminum/complex polyester, this print representing the facial seal.
Figure 2 presents alternative 1' implementation of the present invention, the sealing capacity with overprinted 7' represents the interlayer printing.
Figure 3 shows a fragment I heat sealable lacquer layer 6, which is preferably performed by direct printing with a rough surface and consists of separators 8.
For the manufacture of the invention the closure 1 to the container, as shown in figure 1, the applied film of the complex of the polyester, preferably a film 2 made of polyethylene terephthalate with a thickness of the HH in the range from 10 to 30 μm. This PET film 2 on one side is covered with glue for duplication and use of this adhesive layer is connected with the aluminum film 3. The thickness of the aluminum film is, for example, in the range from 6 to 25 μm. On the free side of the aluminum film 3 is put another layer of glue 4 for duplication, joined by another PET film 2 with a thickness in the range from 10 to 30 μm. On the free side of the PET film 2 is applied to a heat sealable lacquer layer 6. On the opposite side is applied, as shown in figure 1, a printed layer 7, which can be applied by known printing methods such as gravure printing, flexographic printing, digital printing.
Capping the container 1', as shown in figure 2, is made as of manufacturing a composite material 5 consisting of an aluminum film 3, the adhesive 4 for duplication and polyester film 2, preferably of PET film. On the free side of the aluminum film 3 is applied with the method interlayer print printed layer 7'. On the free side of the printed layer 7' in turn can be applied with glue 4 for duplication, which is covered with another polyester film, preferably a PET film 2. Then, to provide the function of the capping containers on the side without the press to apply heat sealable lacquer layer 6.
Heat sealable lacquer is Loy 6, as shown in figure 3, may be made in the form of separators 8 with a rough surface. These separators 8 with a rough surface are used for the in between was the air that facilitates stacking usually stored in stacks of youporon containers 1, 1'. To further facilitate this process of stacking in heat sealable lacquer layer preferably added granular additives.
Other help when stacking is embossed as heat sealable lacquer layer 6 and sides 7 printed, with the preferred matrix is embossed. And these are obtained by stamping convexity also serve to facilitate stacking usually stored in stacks of youporon containers 1, 1'. Thanks to multi-layer symmetrical design of youporon containers 1, 1' their appearance does not deteriorate in the process of dot-matrix printing.
After this, the invention seals the container 1, 1' is compared with the known sheet workpiece for cups having a symmetrical structure made of aluminum/PET/aluminum. As can be seen from the table below, tested, respectively breaking load (N/15 mm)elongation (%) and resistance to puncturing in the measurement conditions using mandrel 9.5 mm and the holes 70 mm and the test results are compared with each other.
Design 1 PET 12/Al 15/PET 12 (the invention)
Design 2 PET 12/Al 25/PET 12 (the invention)
Design 3 Al 15/PET 12/Al 15 (prior art)
|The breaking load, longitudinal||73,9||to 75.2||71,0|
|The breaking load, shear||97,7||104,7||71,5|
|Elongation, longitudinal||116,0||of 60.5||19,1|
|Resistance to puncturing, Dorn 9.5 mm bore 70 mm||109,2||100,6||56,0|
From the above table it is seen that the invention seals the container 1, 1' has a very high resistance to puncturing and tearing in comparison with the known and, symmetric structures composites. The measured values of the transverse breaking load are proof that prevented also commonly arise curves, the so-called "Flexcracks" (cracks forming under the action of bending). In addition, thanks to the use of a very durable film of polyethylene terephthalate resistance to puncturing in comparison with the known composite structures, such as structure 3 with outside aluminum film is greatly improved.
The invention symmetric composite construction allows also to obtain improved corrosion resistance, if in containers with food products stored aggressive packaged products and acidic compounds, or compounds which form acid gases. In this regard, a test was conducted such foods as cheese and deep-spreads, and the portion was Packed in known containers for food, sealed in a conventional aluminum film, and the other identical portion was useprivacy the invention capping containers 1, 1'. After four weeks of storage on aluminum capping was observed corrosion, in contrast to the invention of capping containers 1, 1' foci corrosion was not.
In addition, had the camping, the proposed invention the capping containers 1, 1' is a convenient way for consumers; thanks to the symmetrical design of composite prevents known susceptibility to twisting, in particular, even when the materials are applied to a relatively small thickness. A fact which is also often considered for disposal.
In addition, the proposed invention the sealing capacity has very good resistance to tearing, which, when opened, prevents the formation of sharp edges on detached pieces of film and therefore significantly reduce the risk of damage.
Because, according to the wishes of customers, often high demands are made to the appearance of the packaging material, such as capping of the containers, with the invention of capping containers 1, 1' it is also possible to perform this requirement, as located outside polyester film, preferably a film of polyethylene terephthalate, in particular, when applied to the print has shiny appearance. This visual effect slightest does not deteriorate even after the dot-matrix printing, because polymeric film is provided with sufficient elasticity during the printing process.
Flawless appearance can also be achieved in the case of interlayer printing ways is which additionally has the advantage he refers to the packaged product intermediate layer consisting of aluminum, glue for duplication, complex polyester and heat sealable lacquer layer, completely prevents the penetration of the printing ink in the packaged product. On the other hand, the printing ink is coated with a complex of the polyester, so often sensitive printing is protected from damage.
Summarizing, we can say that using the proposed invention, capping the container 1, 1' was found corresponding to the wishes of our customers a convenient solution packaging. This effect is achieved by using symmetric construction of a composite consisting of a polyester film, aluminum foil and polyester film. Especially preferred in this regard is to use polyethylene terephthalate (PET). Since the complex polyester, and consequently, a polyethylene terephthalate (PET) have stable tensile adhesion to termosvarivaemaya paints, the proposed invention capping containers are for welding the same properties as already known billet aluminum for cups. And yet, compared with them, it is also possible storage of acidic Packed product, as well as PET film have sufficient stability, in particular, to acids, and the e acidic gases.
1. Capping containers, made of a composite film having a symmetrical structure of the complex film of polyester/aluminum foil/film complex polyester.
2. Capping the container according to claim 1, characterized in that the film of the complex of the polyester comprises polyethylene terephthalate.
3. Capping the container according to claim 1, characterized in that the film thickness of the complex of the polyester is in the range from 3 to 100 μm, preferably from 10 to 30 microns.
4. Capping the container according to claim 1, wherein the aluminum film has a thickness of from 3 to 40 μm, preferably from 6 to 25 μm.
5. Capping the container according to claim 1, characterized in that the sealing capacity converted to the Packed product side provided with a seal representing a facial seal.
6. Capping the container according to claim 1, characterized in that the sealing capacity converted to the Packed product side provided with a seal representing the interlayer printing.
7. Capping the container according to claim 1, characterized in that the sealing capacity converted to the Packed product side provided with thermovalve paint layer.
8. Capping the container according to claim 7, characterized in that the heat sealable lacquer layer has a rough surface and is made in the form of geometrically ordered separators.
9. Capping the container according to claim 7 or 8, characterized in that the heat sealable lacquer layer contains granular additives.
10. Capping the container according to claim 1, characterized in that the sealing capacity is embossed on one or both sides.
FIELD: process engineering.
SUBSTANCE: invention relates to producing coextruded biaxially-oriented thermosetting polyether films to be used for sealing packges. Proposed film comprises base layer from polyether with characteristics viscosity exceeding 0.75 and outer thermo sealing layer glued directly to base layer from amorphous polyether or crystalline polyether with fusion temperature not exceeding that of base layer. Proposed method comprises coextrusion of said polymers, cooling coextrudate and biaxial orientation at temperature not exceeding 130°C. Package comprises container, product and aforesaid film to seal said product.
EFFECT: ease of manufacture, expanded applications.
14 cl, 5 tbl, 6 ex
FIELD: transport, package.
SUBSTANCE: package 1 for touch-sensitive foodstuffs, e.g. chocolate or praline paste, comprising tray-like container 2 made from elastically-deformable material to receive first part of said foodstuff and having outlet edge 3 that envelopes said foodstuff and allows its major part to extend out of it, and film 4 made of tear-away plastically-deformable material of in fact, dome-shaped configuration, to contain aforesaid major part of foodstuff extending out of edge 3 of aforesaid tray-like container outlet. Note here that said tray-like container 2 and film 4 are tightly jointed together along edge 3 of aforesaid tray-like container outlet.
EFFECT: ease of opening foodstuff and gripping of it by Consumer lips, ruling out of foodstuff falling out and Consumer fingers dirting.
29 cl, 12 dwg
SUBSTANCE: composite material consists of material of basis and thermoplast deformed layer with convex and recessed sections. Herewith thermoplastically deformed layer in the range of convex sections are implemented thinner than in the range of convex sections. Additionally thermoplastically deformed layer is applied by matting or extrusion on basis material and then at simultaneous forming is heated up to softening temperature. Group of inventions also relate to application of composite material, manufacturing by mentioned above method for glyptic of sealing elements in the form of cup cover.
EFFECT: there is provided manufacturing of sealing elements, storing by piles which are by simple method transferred for its following usage and which, herewith, simultaneously allows acceptable for consumer appearance.
21 cl, 6 dwg
FIELD: personal demand items.
SUBSTANCE: cover is intended for package of foodstuffs, such as yoghurt can or similar. At the same time it may be made of aluminium foil or embossed aluminium composite foil, plastic foil, plastic composite foil, paper foil or paper composite foil. At the same time embossing consists of large number of almost parallel embossed lines. At the same time depth of embossed lines makes value up to 40 mcm, preferably around 30 mcm, and width of embossed lines from 100 to 300 mcm, preferably around 200 mcm. Besides at least several embossed lines have interruption and/or at least in parts have various width and/or various depth of impression.
EFFECT: invention provides for creation of covers that are easily separated from each other when stacked.
11 cl, 3 dwg
SUBSTANCE: repeatedly closing packing for various products consists of a cover and a packing tray, interconnected in rim zone by a heat sealing. Note that the said cover is made from heat-sealable multi-layer film and a substrate, the said heat-sealable multi-layer film is arranged on the product being packed. Note also that the packing tray is made from heat-sealable multi-layer film and a substrate. Mind that the multilayered film from which the packing tray is heat-sealed features a layered structure adjoining directly the heat-sealed layer. Note also that the said layered structure is formed by the adhesive layer preventing migration of substances by a layer, which comprises, at least, 75% be weight of ethylene copolymer with vinyl alcohol and has thickness less than 2 microns, and a layer of the contact glue arranged consecutively in direction from the packing outside.
EFFECT: simple and convenient repeated opening and repeated closing of packing after its first opening.
22 cl, 4 ex
SUBSTANCE: construction (1) of separatable lid has catch (3), which has hole (5), is folded over central panel (4) and fixed on it in folded position by means of strap on catch. Said strap by means of thermal welding is connected with panel (4) only through hole (5) of catch (3), which ensures finger access under unconnected part of catch (3) during container opening. Fixing catch (3) eliminates necessity to apply thick aluminium foil, which preserves folded position of catch without fixing.
EFFECT: allows to reduce thickness of aluminium foil or use instead of it in lid manufacturing oxygen-proof material of lower cost, preserving convenience of processing and use of container.
6 cl, 4 dwg
FIELD: transportation, process engineering.
SUBSTANCE: method of producing the vessel closing plugs consists in fabricating the plug on the basis of, at least, two-layer combination of solid-bed layers furnished with an auxiliary opening element. Note here, that the layer facing the vessel is tightly attached to its edge so that, with combined layers getting separated, a hole is formed to remove the product contained in the vessel there through. The aforesaid layer consists, preferably, from plastic material with the inner breaking strength in the location of the said hole lower than the adhesion with the other part of the plug. Note that the combination of layers in the said hole location is subjected to a higher-pressure and higher-temperature effects using a thermal welding device to up the adhesion in the aforesaid location between the combined layers as compared to the plug remaining crosswise section.
EFFECT: easier access to the vessel content, protection against bacteria and other harmful effects.
10 cl, 11 dwg
FIELD: chemical industry; light industry; other industries; production of the caps for the packing tare sealing.
SUBSTANCE: the invention is pertaining to production of the caps used for the packing tare sealing. The cap is made with the capability of its fixation by means of the thermal welding to the opening of the hermetic bowl and the subsequent its opening. At that the cap contains the layer of the fibrous material, the polymeric layer, the barrier layer concerning the oxygen and the polymeric thermosealing layer. At that the thermosealing layer contains: the copolymer of ethylene and methylacrylate, the copolymer of ethylene and vinylacetate and the polyamide wax. The thermosealing layer is fixed directly on the barrier layer in relation to the oxygen layer having the more higher fusion point - all without any intermediate binding agents. The presented invention also concerns to the method of manufacture of the cap, and also the hermetic bowl supplied with the above-mentioned cap, and to the method of manufacture of the above- mentioned bowl. The invention ensures manufacture of the cap attached by the thermal method and easily opened, besides, the given cap may be manufactured by extrusion within the limits of one operation, and also to diminish the number of the polymeric layers applied one over another.
EFFECT: the invention ensures manufacture of the cap attached by the thermal method and easily opened, besides, the given cap may be manufactured by extrusion within the limits of one operation, and to diminish the number of the polymeric layers applied one over another.
17 cl, 5 dwg, 3 ex
FIELD: food for pets.
SUBSTANCE: proposed packing contains one or more cans and box. Each can is provided with flexible tearoff lid fitted on can by thermal welding. Said lid is made easy to remove. Box is fiber material based sheet placed around cans. Sheet is provided with cuts to receive upper seam of cans and hold them in place. Box protects can lids and holds cans making it possible to take them out of box. Cans can be made of size providing one time feeding of pet and contain feed differing in taste and smell.
EFFECT: provision of diversity in food taste and smell.
8 cl, 3 dwg
FIELD: sealed plastic package for personal use.
SUBSTANCE: proposed package has plastic container forming zone of storage and having sealing surface around entrance into said zone, and metal foil-free multiplayer film hermetically connected to sealing surface and containing plastic layers. At least one of plastic layers is structural plastic layer with parameters providing complete preservation of partly uncovered position of film separated from sealing surface in one piece. Invention relates also to material for cover, containing plastic multiplayer structural film for manufacture of sealed packages for individual use articles placed in plastic container forming zone of storage and provided with sealing surface around entrance of said zone. Plastic multiplayer structural film has at least one of plastic layers with parameters providing complete preservation of partly uncovered position of film and consisting, in fact, of upper layers of polyethylene terephthalate, second layer of low density polyethylene and main layer of high density polyethylene. Material for cover made for removing from sealing surface in one piece provides preservation of partly uncovered position of film. Proposed device provides getting of film having structural integrity which does not separate into layers and does not break when being removed in one piece and it does not decompose in presence of water or domestic detergents, etc. Film protects articles inside from negative substances and it features preset parameters providing complete preservation of partly uncovered position of film facilitating taking of article. Its cost is lower than other films using metal foil, it does not interact with electronic control systems and it permits printing of its surface.
EFFECT: enlarged operating capabilities, reduced cost.
55 cl, 7 dwg
SUBSTANCE: invention relates to multilayer films, having an active oxygen barrier and can be used for packaging using an autoclave. The film contains at least one active oxygen barrier layer which contains a mixture of thermoplastic resin (A), transition metal salts (B) and an oxygen barrier polymer (C), and a layer which contains an iron-based oxygen-binding composition. The film has oxygen binding rate of at least approximately 0.01 cm3 oxygen per day per gram of the oxygen-binding composition.
EFFECT: invention enables to produce sealed packaging from a film with inside oxygen concentration of about 0% after 35 days of storage in relative humidity of 75% and temperature 75°C.
11 cl, 2 tbl, 14 ex
SUBSTANCE: invention relates to articles made from aluminium alloy having high internal pressure resistance at high temperatures and can be used in multilayer tubes used as sanitary pipes or heating pipes. The multilayer tube has a tube wall comprising a core layer made from a rolled aluminium alloy product, and an inner and an outer layer made from plastic. The aluminium alloy in the core layer contains the following, wt %: Si from 0.2 to 1.4, Fe+Mn from 1.1 to 1.8, Cu from 0.15 to 0.5, Mg <0.2, Ti <0.2, Zn <1.5, impurities <0.05 each, total <0.2, and the balance being aluminium.
EFFECT: longer service life of flexible multilayer tubes.
13 cl, 1 dwg, 4 tbl, 1 ex
FIELD: process engineering.
SUBSTANCE: invention relates to production of composite materials, particularly, to two-layer sheet material and to method of its fabrication. Two-layer sheet material comprises metal substrate from aluminium and layer of PTFE. Metal substrate is made from aluminium powder and bonded with the layer of PTFE powder layer over the entire surface of contact by blast extrusion to produce wavy surface of bond. Proposed method comprises producing metal substrate, applying polymer coat from PTFE and thermal treatment. Aluminium powder is used as substrate material. Application of polymer coat is accompanied by blas extrusion using sliding shock wave at the pressure of 0.5-0.7 GPa and with shock pulse duration of, at least, 35 mcs while thermal treatment is performed at 400°C and 0.6-0.7 MPa.
EFFECT: higher adhesion due to PTFE blast shock wave effects.
2 cl, 3 dwg, 1 tbl, 1 ex
FIELD: paint-and-varnish industry.
SUBSTANCE: this invention covers application methods of decorative coatings, and lamination of a decorative film from resin-base material covered with a decorative metal film. Polymer leveling film is laminated at resin-base material by precipitation polymerization method, and then the decorative metal film is laminated at the leveling film.
EFFECT: perfect adhesion of a resin-base material, and a glaze for a decorative metal film.
6 cl, 2 dwg
SUBSTANCE: invention refers to a structural part that comprises a metal component and a plastic component, which are connected to each other by means of a linkage system that may withstand long-term load of connection between part components, and to the method for manufacturing of such a structural part. The linkage system that connects the metal component and the plastic component comprises a binding substance based on plastic or a binding substance based on plastic in combination with a primer. At the same time the plastic-based binding substance is an epoxide modified by means of covalent attachment of 1,3-diene. Besides, the binding substance contains a hardener.
EFFECT: manufactured structural parts have high bending strength and torsional stiffness, are able to withstand dynamic and static load, may be applied in corrosion media.
23 cl, 1 dwg, 1 tbl
FIELD: process engineering.
SUBSTANCE: invention relates to laminar material made from metal sheets and polymer layer reinforced by fibers and bonded therewith, to be used in aircraft or aerospace engineering. Laminar material comprises at least one first metal layer of invariable thickness of at least 1.5 mm and at least one second of invariable thickness of at least 1.5 mm. Said first and second layers are bonded together by polymer layer reinforced by fibers, volume content of fibers not exceeding 45%. Aforesaid polymer layer comprises reinforcing fibers laid in polymer matrix and selected from the group including fiber glass, carbon fibers, drawn thermoplastic fibers, natural fibers and combinations thereof. Said fibers are impregnated by polymer matrix in partially hardened state.
EFFECT: hardened, high fatigue strength material.
17 cl, 6 dwg
FIELD: process engineering.
SUBSTANCE: set of inventions relates to plain bearing and method of its production. Proposed plain bearing comprises metal base, intermediate layer applied thereon and antifriction layer applied on said intermediate layer. Said intermediate layer comprises at least one thermoplastic polymer containing functional groups of the formula
Note here that R stands for cyclic or linear organic radicals with 1-20 carbon atoms. Note also that functional groups are implanted into thermoplastic polymer by adding at least one modifying agent, namely, toxilic acid and its derivatives, in particular its anhydride and or itaconic acid and its derivatives, particularly, its anhydride, and/or citraconic acid and its derivatives, particularly, its anhydride.
EFFECT: bearing that requires no servicing.
24 cl, 2 dwg
SUBSTANCE: coating composition contains a polyvinyl chloride polymer, an acrylic resin which is preferably a polymer obtained from monomer acrylates or methacrylates, such as acrylic acid, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, pentyl acrylate, hexyl acrylate, methacrylic acid, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, pentyl methacrylate, hexyl methacrylate resins, copolymer resins of said components or mixtures thereof, a cross-linking agent which is obtained from phenol, para-tert-butylphenol, xylenol or mixture thereof, and formaldehyde, an additive, a dye and a solvent component, and the composition essentially does not contain bisphenol A diglycidyl ether (BADGE) and bisphenol A resin. The coatings are suitable for containers made from three parts, as well as for metal cans made through deep-drawing. The coatings are particularly useful for covers which are torn in order to open due to their unusual flexibility and resistance to sterilisation.
EFFECT: composition provides coatings for metal cans which have suitable flexibility, resistance to scratching, adhesion and sterilisation during processing while in contact with food.
FIELD: process engineering.
SUBSTANCE: invention relates to sensor foil and sensor switch made thereof. Sensor foil is made up of multiple superimposed layers. Note that carrier second conducting layer 2 is arranged above first carrier layer 1, while second carrier layer 3 coated by paint 4 is arranged on conducting later 2. First carrier layer 1 provided with conducting layer 2 and second carrier layer 3 with pint coat 4 are glued together by adhesive layer 5. Device assembled of said layers 1 - 5 is glued to carrier layer 7 by adhesive 6 made, for example, from glass.
EFFECT: possibility to use in household electrical appliances, eg furnaces.
7 cl, 2 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to coat and method of coating outer surfaces. Proposed method of coating pipeline outer surfaces by polymer capable of forming cross-links under action of water comprises the following stages: a) pipeline outer surface is coated by, at least, one polymer that forms cross-links under action of water. Note here that said polymer represents HDPE grafted by alkoxy silane. b) Polymer is cross linked on subjecting it to water at increased temperature to produce cross-linked polymer layer unless cross linking degree makes ≥30% to ≤80%. c) Polymer is cross linked that can form cross links under action of water at ≥50°C to ≤350°C, preferably at ≥150°C to ≤300°C, more preferably at ≥200°C to ≤260°C. Note here that during these stages, pipeline is heated to ≥170°C to ≤230°C, preferably to ≥180°C to ≤220°C, more preferably to ≥190°C to ≤210°C. Powder ionic spraying method is used epoxy resin layer is applied with thickness of ≥0.08 to ≤0.16 mm, preferably of ≥0.10 to ≤0.13 mm, more preferably, 0.125 mm. Method of envelopment extrusion is used to apply a layer of glue with thickness of ≥0.15 mm to ≤0.30 mm, preferable of ≥0.22 mm to ≤0.27 mm, more preferably of 0.25 mm. By method of extrusion, applied is upper layer of HDPE with thickness of ≥2.8 mm to ≤3.2 mm, preferably of ≥2.9 mm to ≤3.1 mm, more preferably of 3 mm. Extrusion is used to apply layer of HDPE cross linked by silane with thickness of ≥0.8 mm to ≤1.2 mm, preferably of ≥0.9 mm to ≤1.1 mm, more preferably of 1 mm. Now, pipeline is treated by water with temperature of ≥10°C to ≤40°C, preferably of ≥20°C to ≤30°C, more preferably of 25°C. Coat is made as described above. Invention covers also coated pipeline.
EFFECT: improved operating performances and expanded applications.
11 cl, 2 tbl, 3 dwg, 2 ex
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