Abstract: The laminated sheet of this invention is a sheet including expanded porous polytetrafluoroethylene films laminated by thermal compression bonding, wherein the sheet has a specific surface area of 9.0 m2/g or larger and a density of from 0.4 g/cm3 to lower than 0.75 g/cm3, thereby making it possible to improve both the creep resistance and the adhesiveness between the films of the expanded porous PTFE film-laminated sheet.

Abstract: Novel synthetic leather articles comprise a substrate and a coating applied to a surface of the substrate. The coating comprises a resin and a polymeric colorant. The polymeric colorant comprises a chromophore and an oligomeric constituent bound to the chromophore. Novel methods for producing synthetic leather articles using polymeric colorants are also provided.

Abstract: Provided are multilayer laminates having one or more layers comprising twisted nematic liquid crystals and one or more layers of a polymeric sheet comprising a polymer with a modulus between 20,000 psi (138 MPa) and 100,000 psi (690 MPa). The twisted nematic liquid crystal layers reflect infrared radiation. Thus, the multilayer laminates are useful to reduce the transmission of infrared energy. For example, in some embodiments the multilayer laminates are useful as windows to reduce energy consumption necessary to cool the interior of a structure such as an automobile or building. Preferably, the multilayer laminates retain the beneficial properties of safety glass. The multilayer laminates may include additional layers such as infrared absorbing layers, half wave plates, and the like, to minimize the transmission of infrared energy. The multilayer laminates may also include further additional layers such as polymeric films, polymeric sheets, rigid sheets, and the like.

Abstract: The present invention aims at the continuous and stable production of an organic-resin-coated metal sheet in producing the organic-resin-coated metal sheet by an extrusion method using a laminating roll which can prevent resin portions (ear portions) protruding from the metal sheet being wound around shaft portions of the laminating roll. Using a laminating roll in which a width (A) of a region thereof coated with a lining material satisfies a relationship of 0?A?B?20 mm with respect to a width (B) of the metal sheet, a thermally melted organic resin is extruded and is applied to the metal sheet such that end portions of the organic resin in the widthwise direction protrude from outer portions of the laminating roll applied with the lining material, and the resin portions in a semi-molten state which protrude from respective edges of the metal sheet are removed by press-cutting.

Abstract: A method of forming an elastomeric tire component is provided, comprising the following steps. An apparatus is provided which includes a rotating applicator head and a non-rotating portion. The non-rotating portion has an internal channel having a first end in fluid communication with a gear pump and a second end in fluid communication with a first channel of the rotating applicator head. The first channel is substantially aligned with the Z axis. The rotating applicator head further includes a second channel in fluid communication with the first channel, and wherein the second channel is oriented at an angle with respect to a Y axis and is in fluid communication with a nozzle. The method further includes pumping a strip of elastomeric material through said internal channel and then into said first and second channel, and then through an outlet of said nozzle onto a surface.

Abstract: A seal for a container for comestibles, especially portable liquids, and in particular for use for sealing polyester containers such as bottles, which is suitable for passage through a PET recycling process, comprises a metal foil layer, a foam layer and a plastics film layer as well as a heat sealable layer below the foil. The foam is selected for its density and thickness so is to confer upon the seal a high buoyancy. The adhesion a between the foam and the foil is increased compared to currently available products, in order to prevent de-lamination between the foil and the foam during the recycling process.

Abstract: A method for making a water-proof laminate from wood, includes a lower mold. A lower cover is provided in the lower mold. A wood plate is provided on the lower cover in the lower mold. An upper cover is provided on the wood plate. An upper mold is provided for pressing the lower cover, the wood plate and lower cover against the lower mold. A coating is injected into the upper and lower molds to cover at least the edges of the upper mold, wood plate and lower mold so that a water-proof laminate is finished after the curing of the coating. The upper mold is moved from the lower mold, and the water-proof laminate is moved from the lower mold.

Abstract: A method for decorating the cylindrical walls of receptacles, comprising the following steps: a) moveable mandrels are arranged in a loop and are displaced, keeping their axes parallel to a direction D; b) each receptacle is engaged by the cylindrical wall thereof on the mandrel; c) the mandrel is brought into the vicinity of a marking cylinder which turns about a fixed axis parallel to direction D; d) the mandrel is rotated at a speed which is correlated with that of the marking cylinder; e) a transfer film support strip is displaced between the marking cylinder and the mandrel; f) the marking cylinder and mandrel are placed in contact with each other such that the marked area of the transfer film adheres to the cylindrical wall; g) the support strip is removed from the cylindrical wall of the receptacle. The inventive method is adapted to the manufacture of flexible tubes and can be easily implemented on existing devices such as capping machines.

Abstract: A gripping jig for assembling applies a force to a molded body in a direction perpendicular to an assembling direction. When an assembling load is applied to the molded body, the force is adjustable with an adjustment screw such that the molded body is guided to move in the assembling direction. Since the force is applied from a direction different from the assembling direction, the molded body can move in the assembling direction, and as the force is adjustable, application of the assembling load to the molded body and movement of the molded body can be adjusted. Since a plurality of molded bodies are fixed and assembled respectively, when there are variations in size of the molded bodies, if an excessive assembling load is applied, each molded body is guided to move, so that more uniform assembling load is applied to the plurality of molded bodies.

Abstract: A device for joining substrates (11) is provided inside a clean booth (12). a single axis robot (46) and a five axis robot (47) convey a wafer (25) and a glass substrate (33). A transcribing station (91) obtains a transcribing film (112) on which adhesive is applied from a film supplying section (113), and presses the transcribing film (112) to the glass substrate (33) so as to transcribe the adhesive to the glass substrate (33). A peeling station (92) peels the transcribing film (112) from the glass substrate (33). A joining station (57) positions the wafer (25) and the glass substrate (33), adjusts parallelism of joining surfaces of the wafer (25) and the glass substrate (33), and joins these substrates together. Since the handling and the joining of the wafer (25), the glass substrate (33) and the transcribing film (112) are performed in the clean booth, it is prevented that a yield ratio of the product decreases because of the adhesion of foreign matters.

Abstract: The invention discloses double-sided metal clad laminates and fabrication methods thereof. A plurality of polyamic acid coatings is co-extruded on a first metal foil and heat imidization to provide a multilayer polyimide film. A second metal foil is hot pressed on the multilayer polyimide film, thus providing a double-sided metal clad laminate. The polyamic acid coatings include a first, a second, and a third polyamic acid coating with surface tensions of S1, S2, and S3, respectively, satisfying relations of S1>S2>S3, wherein the first polyamic acid coating is the coating directly applied on the first metal foil.

Abstract: An elastic composite formed from a laminate that contains an elastic film and a lightweight nonwoven facing having a low strength in the cross-machine direction (“CD”) is provided. Due to the low strength of the facing, it is desirable that the elastic film have a sufficient thickness and weight to enhance the strength of the resulting composite. Unfortunately, the ability to join an elastic film to such a lightweight nonwoven facing becomes increasingly difficult as the thickness of the film increases. In this regard, the present inventors have discovered that a second laminate may be employed in the elastic composite that is formed from a thermoplastic film and nonwoven facing to impart increased strength to the composite. The film and facing of the second laminate may be formed from the same or different materials than the film and facing of the first laminate. Regardless, the laminates are positioned so that the elastic and thermoplastic films are in a face-to-face relationship.

Abstract: De-airing of PVB/glass laminates can be improved, while haze in the pre-press is minimized and sleep time reduced as a result using a PVB sheet having a roughened surface with directionality. A roughened surface with a washboard pattern that is useful in this regard can be obtained by varying certain conditions of a melt-fracture extrusion process.

Abstract: In accordance with the invention, substrate-supported linear arrays are formed by the steps of adhering a thin layer of polymer between a pair of substrates and separating the substrates perpendicular to the layer. The polymer layer separates to form substrate-supported polymer gratings on both substrates, each grating having a period proportional to the thickness of the layer. The process has been used to make gratings with periods in the sub-micron range or larger over areas covering square centimeters.

Abstract: A fluid-filled chamber may include an outer barrier formed from a polymer material and a foam tensile member located within the outer barrier. In manufacturing the fluid-filled chamber, a mold may be contoured to substantially equalize compressive forces between the outer barrier and various portions of the tensile member, thereby providing substantially uniform bonding between the outer barrier and the tensile member. Surfaces of the tensile member may also be contoured to substantially equalize compressive forces. In some configurations, the outer barrier and tensile member may be formed from thermoplastic polymer materials that form a direct bond between the outer barrier and surfaces of tensile member.

Abstract: A hybrid composite fabric garment includes a first fabric portion and a second fabric portion. The first fabric portion includes a first inner fabric layer, a first outer fabric layer, and a first barrier layer disposed therebetween. The first barrier includes a first nonwoven membrane and has a first predetermined air permeability. The second fabric portion includes a second inner fabric layer, a second outer fabric layer, and a second barrier layer disposed therebetween. The second barrier layer includes a second nonwoven membrane and has a second predetermined air permeability substantially greater than the first predetermined air permeability.

Abstract: A method for manufacturing a complex including a support layer, based on a textile, a foam or a heavy mass, combined with a surface layer based on a polymeric material having a predefined surface state. The method of consisting of: (i) depositing a coating film of the said polymeric material of the surface layer on a sheet of paper having a surface state complementary to the predefined surface state of the complex to be obtained; (ii) calendering the support layer with an intermediate layer based on a second polymeric material obtained by extrusion upstream of the calender, and the assembly formed from the sheet of paper and the coating film; and (iii) withdrawing the sheet of paper.

Abstract: The present invention is directed to a method for manufacturing a panel containing wood fibers. The wood material is cut into strands having a thickness and a width perpendicular to the grain direction and a length parallel with the grain direction, the length being significantly greater with respect to the other dimensions. An adhesive is applied to the strands, the glued strands are formed into an assembly, wherein the strands are substantially parallel in the longitudinal direction, and the strands remaining substantially parallel in the longitudinal direction are extruded by applying a thrusting force substantially perpendicular with respect to the longitudinal direction of the strands.

Abstract: Systems and methods are described where at least one roller (e.g., a kicker roller) is used to impregnate fibers (i.e., a charge or reinforcement) with a liquid resin (i.e., matrix) by eliminating air from the resin and fibers as they enter a pressurized zone. Air is forced out as the resin is first drawn into an entry zone of the roller, then into an entry gap adjacent to the roller, and then into the pressurized zone on the opposite side of the roller. The pressurized zone is an enclosed area at the output side of the roller where the resin is allowed to accumulate and the resin and composite combination are then forced out through a small exit gap. Shear forces between the surface of the quickly rotating driven roller and the resin provide the driving force. The fibers may be continuous (e.g., from a roller) or discontinuous or loose cut.

Abstract: A method of manufacturing a replica diffraction grating includes the steps of: forming a metal thin film on a grating surface of a master diffraction grating, adhering a replica substrate to the metal thin film via an adhesive, and removing the replica substrate so that the metal thin film in a reverse state is adhered on the replica substrate. In the method, before forming the metal thin film on the grating surface of the master diffraction grating, the grating surface is coated with a fluorine surface treating agent as a release agent. Then, the metal thin film is formed with vacuum vapor deposition.

Abstract: A laminate for electronic-type applications having a conductive layer and a dielectric multilayer. The dielectric multilayer comprises at least three layers: i. an adhesive layer; ii. a low coefficient of thermal expansion layer; and iii. a curl balancing layer. Optionally, the laminate can also comprise a second conductive layer bonded to the curl balancing layer.

Abstract: A glass fiber reinforced thermoplastic sheet material is provided in which certain properties, or combinations of properties, are improved relative to similar comparative sheet materials. The sheet material generally comprises a glass mat or glass fabric fiber reinforced thermoplastic resin in which the thermoplastic resin at least partially impregnates the glass mat or fabric. The thermoplastic sheet material contains about 15 wt. % to about 65 wt. % of the glass mat or fabric based on the weight of the thermoplastic sheet material and has a thickness in the range of about 0.4 mm to about 3.0 mm. By including glass mat or fabric and maintaining the sheet thickness in the aforementioned range, the present invention thermoplastic sheet material exhibits improved flexural and/or tensile strength and modulus properties at reduced basis weight compared to a comparative thermoplastic sheet materials.

Abstract: A laminate thermoplastic sheet, and an apparatus and a method of making the sheet are disclosed. The laminate sheet has a substrate layer, a middle foam layer, and a cap layer bonded together. Each layer is chemically compatible with the others, thereby facilitating a recycling thereof. The apparatus and the method of producing the sheet includes extruding the cap layer, feeding a sheet foam material for the middle layer in substantial alignment with the cap layer; providing a roll assembly that compresses the cap layer and the middle layer together and forms a bond therebetween; extruding a thermoplastic substrate layer; and compressing the laminate and the substrate layer to form a bond therebetween and form a final three-layer laminate sheet.

Abstract: A method for forming a laminated synthetic leather includes engaging a textile carrier onto a carrying roll, extruding one or more materials with an extruder machine into a film, and feeding the film downwardly onto a lamination roll to have the film carried on a portion of an outer peripheral portion of the lamination roll and to have the film to be suitably cooled by the lamination roll. The film and the textile carrier are then compressed together with the rolls, to form the laminated synthetic leather, and to prevent the film from penetrating into the textile carrier to a greater extent, and to form a soft or flexible laminated synthetic leather.

Abstract: A laminate of inorganic sheet and polyester resin having an overall thickness of 5 to 25 mils and having an elongation at break in both the cross direction and machine direction of at least 25%.

Abstract: A reconfigurable material press having a first portion and a second portion. The first portion includes a frame, a plurality of plates releasably coupled to the frame, and a pressing surface. Each plate has a semi-circular profile. The second portion includes a plurality of support structures generally longitudinally parallel and laterally spaced apart from one another, and a top plate slidably coupled to each support structure and having a forming edge. Each top plate is configured to be laterally adjustable, and the top plates define a channel therebetween.

Abstract: A laminate for electronic-type applications having a conductive layer and a dielectric multilayer. The dielectric multilayer comprises at least three layers: i. an adhesive layer; ii. a low coefficient of thermal expansion layer; and iii. a curl balancing layer. Optionally, the laminate can also comprise a second conductive layer bonded to the curl balancing layer.

Abstract: The present invention includes a process for making a magnetically readable card. The process includes providing a polymeric extrudable substrate material and one or more magnetic strips. The substrate is extruded in an extruder. The magnetic strips are aligned and coextruded with the polymeric substrate in the extruder to form a continuous length of magnetic strips and polymeric material.

Abstract: The invention concerns a method for preparing a thin ceramic material with controlled surface porosity gradient, including (A) infiltrating a porous pore-forming substrate of controlled thickness, with a ceramic material suspension; (B) evaporating the solvent; (C) a step which includes eliminating the pore-forming agents and the various organic additives, and (D) a sintering step. The invention also concerns the use of the ceramic material in the method for preparing a solid electrolyte and a mixed ionic-electronic conductor, in methods for preparing ultra-pure oxygen, for eliminating oxygen from a gaseous atmosphere, for producing heat energy, for preparing gas or liquid filtering membranes, for ceramic/metal joints, for biomaterials and sensors.

Abstract: A process for preparing a laminated, thermoformed film which comprises: a. blowing a film-forming composition to form a bubble; b. collapsing the bubble to form a film stack comprising a plurality of layers; and c. heating said film stack in a mould to thermoform said film stack and to adhere the layers together.

Abstract: A method for forming a laminated synthetic leather includes engaging a textile carrier onto a carrying roller and engaging a release liner onto a lamination roller, extruding one or more materials with an extruder machine into a film, and feeding the film downwardly onto the release liner and to have the film carried on the release liner, and to have the film and the release liner to be suitably cooled by the lamination roller. The film and the textile carrier may be compressed together with the rollers, to form the laminated synthetic leather. The release liner may include one or more flat or spatial patterns for transmitting to the film.

Abstract: The invention relates to a method and a plant for producing polyolefinic transpiring films by means of bubble extrusion of a LLDPE and filler mix, flattening of the extruded tube to obtain a double layer flat film and transversely and/or longitudinally stretching of the double layer flat film.

Abstract: Disclosed is a method for preparing a corrugated sandwich panel including the steps of: extruding melted polyethylene resin by use of an extruder and a slit nozzle; molding the extruded polyethylene resin to a vertically corrugated inner sheet by use of a plurality of molding rolls; supplying a lower sheet from the lower portion of the inner sheet and an upper sheet from the upper portion thereof; forming a plurality of melting grooves by use of heaters each provided between the upper sheet and the inner sheet and between the lower sheet and the inner sheet such that the melting and bonding between the upper sheet and the inner sheet and between the lower sheet and the inner sheet is conducted; and pressing the upper sheet, the inner sheet and the lower sheet each having the plurality of melting grooves formed thereon by use of a plurality of press rolls.

Abstract: The present invention relates to an imaging element comprising at least one imaging layer and a base. The base comprises a foam core layer, which comprises a polymer that has been expanded through the use of a blowing agent, and at least one polymeric surface smoothing layer, which comprises a solution polymer.

Abstract: The present invention relates to an imaging element comprising an imaging layer and a support, wherein the support comprises a core layer having a surface roughness of at least 1.4 microns and a pit camouflaging flange layer between the support and the imaging layer. The present invention also relates to a method of forming an imaging support comprising extruding a polymer layer onto a core layer of surface roughness of at least 1.4 microns, and passing the extruded polymer layer on the core layer between two temperature controlled rollers, one of which comprises a pit camouflaging surface and a method of forming an imaging support comprising extruding a polymer layer, passing the extruded polymer layer between two temperature controlled rollers, one of which comprises a pit camouflaging surface, and laminating the polymer layer onto a core layer with a surface roughness of at least 1.4 microns.

Abstract: The present invention provides a method for treating a surface of a layered polymeric structure. The method includes the steps of: (1) providing a first sheet of material, (2) providing a second sheet of material, (3) positioning the first sheet or the second sheet to overlap at least a portion of the other sheet to define an interference zone, (4) directing a first polymeric material into the interference zone to adhere the first sheet to the second sheet to form the layered structure; and (5) texturing a surface of the first sheet or the second sheet to form a pattern on the surface.

Abstract: Laminates of thermoplastic films and nonwoven fibrous webs are made at high speeds on the order of about 700 fpm to about 1200 fpm. Bond strengths of film and nonwoven laminates are effectively controlled to make breathable laminates at high speeds. Air cooling devices cause the air to flow substantially parallel to the extruded plastic web during drawdown and provide a plurality of cooling air vortices to effectively cool the web. Film gauge control is also achieved by the method.

Abstract: A process for reducing the haze of extrusions of clear polymeric blends containing styrene-butadiene copolymer and a polymer immiscible therewith. An assembly of extrusion layers in which a layer of clear polymeric blends containing styrene/butadiene copolymer and a polymer immiscible therewith is overlayered with layers of clear material that provides a smooth extruded surface.

Abstract: The invention relates to a method for fabricating a drip irrigation pipe, comprising a pipe (5) wherein a plurality of dripping elements (4) are bound, communicating with the outside through holes formed in the pipe wall. The method according to the invention provides that the pipe (5) is extruded and the individual dripping elements (4) are bound therein by consecutively feeding the dripping elements (4) inside the pipe through the extruding head (1). The speed of the dripping elements (4) is higher than that of the pipe upon extrusion at least in the area of first contact between the pipe and the dripping elements (4). The invention also relates to a plant for implementing said method.

Abstract: Methods for forming a thermoplastic film with an attached closure strip are disclosed. The film can be used to produce zippered reclosable plastic bags. The methods include providing a thermoplastic film web having a sealing surface and a closure strip having a binding surface, both being in a non-melted condition. The film web and the closure strip are aligned in non-overlapping relationship and a heated thermoplastic binder layer is positioned on the film web sealing surface and on the closure strip binding surface quickly after extrusion. The hot binder layer transfers enough heat to the closure strip and to the film web to melt the closure strip binding surface and the film web sealing surface. Pressure is applied to seal the closure strip to the film web. An apparatus for practicing the method and a reclosable bag formed from the thermoplastic film with attached closure strips are also disclosed.

Abstract: This invention relates to a non-contact coating method for producing a substantially continuous coating and articles constructed therefrom. This invention further relates to a non-contact slot coating method for producing a variety of coatings and laminations. This invention particularly relates to a method of coating a non-porous substrate including film, foil and paper with a molten thermoplastic composition which reduces streaking caused by particles such as impurities, fillers and superabsorbent polymers. This invention further relates to thermoplastic compositions useful in the present non-contact coating method.

Abstract: Rollers, substrates, products and the like are not smeared with a sticky volatile component when a gas is blown from a blower provided near an extruding die to produce laminates. The blower is heated by a heater at a temperature not below the volatilization temperature of the volatile component volatilized from a resin film of thermoplastic resin extruded in molten conditions from the extruding die, and therefore the volatile component cannot stick on the blower and is immediately volatilized on the blower.

Abstract: The invention relates to methods for joining or assembling thermoplastic synthetic extrudates, especially in the form of a billet or band, to material surfaces, preferably by means of gluing, in addition to objects produced according to said methods. The invention also relates to the use of special adhesives and adhesive compositions for gluing thermoplastic synthetic extrudates to material surfaces.

Abstract: Improvements are disclosed for an apparatus for continuously molding small fastener elements integral with a base web from a flowable resin. The apparatus comprises a cylindrical mold roll rotatable about an axis and defining small fastener element-shaped mold cavities in the surface thereof, and pressure-applying means to apply operating pressure to force the resin into the cavities at a pressure zone. The pressure-applying means and mold roll define a mold gap therebetween for forming the base web. The advantageous use of relatively long mold rolls, to produce a correspondingly wide web, and the use of higher molding pressures, e.g. to form very small fastener elements, is enabled by various improvements, including means to maintain the mold gap at a desired thickness profile across the length of the molding region of the mold roll under operating pressure. In some cases the pressure-applying means includes a pressure roll, in other cases it includes a resin nozzle assembly or pressure head.

Abstract: A molded product of fiber reinforced composite material is provided, which includes a substantially flat portion and a shaping portion that is molded to be more complex in shape than the flat portion. The substantially flat portion has a first parent material and a reinforcing material made of long-fiber sheet, and the shaping portion has a second parent material and short fibers.

Abstract: Process for the continuous solvent-free and mastication-free production of self-adhesive compositions based on non-thermoplastic elastomers in a continuously operating apparatus having a filling section and a compounding section, comprising a) feeding the solid components of the self-adhesive composition, such as elastomers and resins, into the filling section of the apparatus, optionally feeding of fillers, colorants and/or crosslinkers, b) transferring the solid components of the self-adhesive composition from the filling section to the compounding section, c) adding the liquid components of the self-adhesive composition, such as plasticizers, crosslinkers and/or further tackifier resins to the compounding section, d) preparing a homogeneous self-adhesive composition in the compounding section, and e) discharging the self-adhesive composition.

Abstract: A method for the manufacture of a cable having at least one conductor and at least one sheath surrounding the conductor which is made of an insulating plastic material, wherein the plastic material is applied to the conductor by extrusion and is subsequently cross-linked or cured in a tube-like envelope by supplying heat thereto, wherein a tube-shaped or hose-shaped envelope is continuously produced around the cable sheath in an intimate contact with or at a radial distance therefrom after said extrusion, which envelope is adapted to ensure the counterpressure required for the cross-linking or curing process in the cable sheath.

Abstract: A multi-layered stretched resin film comprises a base layer (A) comprising more than 90 wt % of a polyolefinic resin and less than 10 wt % of an inorganic fine powder and/or an organic filler; and an amorphous resin-containing layer (B), comprising 0 to 85 wt % of a second polyolefinic resin, which may be the same or different than the first polyolefinic resin, and 15 to 100 wt % of an amorphous resin. The amorphous resin-containing layer (B) is disposed on at least one side of the base layer (A), and has a porosity of 5% or less. Such multi-layered stretched resin films are resistant to waving or curling caused by exposure to the vehicle component of offset printing inks during offset printing, and therefore have excellent printing properties.

Abstract: A manufacturing method for a synthetic leather includes a first step of feeding materials of preset volume, a second step of materials foaming (capable to be skipped if unnecessary), a third step of material and mixing injecting to produce liquid mixed materials by instant reaction, a fourth step of conveying two basic cloths, a fifth step of compressing the two basic cloths with the liquid mixed materials producing reaction between the two basic cloths conveyed to an upper portion of two rollers to produce synthetic leather, and a sixth step of winding finished synthetic leather on two winding wheels.

Abstract: An over-current protection device and manufacturing method thereof are revealed. The method for manufacturing an over-current protection device comprises the steps of: (1) providing at least two polymer current-sensing elements, the at least two polymer current-sensing elements comprise flame retardant, and the switching temperatures of adjacent polymer current-sensing elements differ from each other by at least 5° C.; (2) irradiating the at least two polymer current-sensing elements; (3) annealing the at least two polymer current-sensing elements; and (4) combining a first electrode foil and a second electrode foil with the at least two polymer current-sensing elements as a laminate. The at least two polymer current-sensing elements can be irradiated of less than 50 Mrads by Cobalt 60, and be annealed 6-20 hours with a temperature between 100-120° C. Moreover, the flame retardant may be composed of magnesium hydroxide or talc.