EP0808245A1 - Stratifies plastiques/metalliques ameliores - Google Patents

Stratifies plastiques/metalliques ameliores

Info

Publication number
EP0808245A1
EP0808245A1 EP96907035A EP96907035A EP0808245A1 EP 0808245 A1 EP0808245 A1 EP 0808245A1 EP 96907035 A EP96907035 A EP 96907035A EP 96907035 A EP96907035 A EP 96907035A EP 0808245 A1 EP0808245 A1 EP 0808245A1
Authority
EP
European Patent Office
Prior art keywords
laminate
plastic
ethylene
laminate according
heat seal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96907035A
Other languages
German (de)
English (en)
Inventor
Felix Achille
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Publication of EP0808245A1 publication Critical patent/EP0808245A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
    • B32B2315/10—Mica
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/043—HDPE, i.e. high density polyethylene

Definitions

  • This invention generally relates to improved plastic/metal laminates with improved adhesion to various substrates, improved heat-sealabi ty. and a lower Coefficient of F ⁇ ction ("COF")
  • the improved plastic/metal laminates of the present invention also exhibit reduced breakage rates and substantially reduced flaking and dusting during the manufacture of cables and other formed plastic/metal composite articles utilizing the plastic/metal laminates of the present invention
  • the present invention relates to plastic/metal composite articles or laminates that can reasonably be expected to be installed and/or otherwise used as electrical communications cables.
  • metal/plastic/metal laminates for potential use as electrical appliance housings, in heating ducts, in various automotive applications, etc
  • plastic/metal laminates of the present invention is in electrical cables.
  • electrical cables especially telecommunication cables such as telephone cables, it is known to assemble insulated conductors or glass fibers in a core and surround it by shield and jacketing components.
  • the shield component is often referred to as shield, screen, shielding tape, or armoring tape.”
  • plastic/metal laminates for example, shielding or armoring tape
  • the process by which plastic/metal laminates are made into cables generally consists of an unwind stand which delivers the plastic/metal laminate, typically having a width from 0.5 inch ( 1.27 e i to 8.0 inches (20.32 cm), to a comigator. ( if smooth finished cable is desired, the comigator is bypassed ) From the corrugator.
  • the plastic/metal laminate is forwarded to a pretormer or a forming tray which starts the shaping of the laminate into a tube.
  • the preformed laminate is then forwarded to at least one forming die. at which point the laminate is formed into a tube having an overlap seam.
  • the core is fed inside the formed plastic/metal tube.
  • the plastic/metal tube containing the core is forwarded to at least one sizing die which sizes the plastic/metal tube to the proper dimension of the desired cable
  • a heating source can be used to promote the adhesion of the overlap seam
  • a jacketing resin is extruded onto the plastic/metal tube
  • the final cable is cooled in a water bath and is typicallv wound on a coil
  • the line speed of this cable fab ⁇ cation process can range from 8 ft/min (2.44 m/min.) to 300 ft/min (91 44 m min) In the present art.
  • a preferred mode of operation in the industry is to apply an oil lubricant to the surface of the plastic/metal laminate pnor to the preforming operation of the fabncation process
  • the intended purpose of the oil lubricant is to lower the COF of the plastic/metal laminate surface contacting the preformer, forming d ⁇ e(s). and sizing d ⁇ e(s)
  • the use of an oil lub ⁇ cant can sometimes substantially reduce the adhesion performance of the plastic/metal laminate to the jacketing component as well as reduce the adhesion in the overlap seam.
  • the use of an oil lubncant can also sometimes cause guidance problems between the plastic/metal laminate and affected process surfaces.
  • plastic/metal laminates that exhibit reduced rates of breakage, exhibit reduced flaking and dusting, maintain or increase adhesion to jacket components, and maintain or increase adhesion in overlap seams while eliminating or substantially reducing the amount of oil lubncant needed dunng manufacture into articles such as electrical cables
  • the present invention substantially solves the problems of. abrasion, flaking, dusting, and breakage of plastic/metal laminates (for example, plastic coated cable shielding tapes) dunng the shaping and forming of these laminates into cables and other formed plastic/metal articles while substantially reducing or eliminating the need to use an oil lubricant In general.
  • plastic/metal laminates for example, plastic coated cable shielding tapes
  • the plastic/metal laminates of the present invention also exhibit improved heat-sealabihty and adhesion to outer jacketing components
  • the present invention is a plastic/metal laminate comprising a metallic substrate and at least one surface layer adhered to said substrate either directly or ia an intermediate polymeric layer or iavers.
  • said surface layer consisting essentially of a base adhesive polymer or blend of polymers and an amount of embosser sufficient to substantially lower the coefficient ot friction of the laminate and sufficient to emboss said surface layer
  • the present invention is a more finished plastic/metal composite article, such as an electneal or communication cable, comprising a core of at least one insulating conductor or glass fiber, a shield surrounding said core, and an outer plastic jacket surrounding and adhered to said shield.
  • said shield compnsing a metallic substrate, a surface layer adhered to said metallic substrate either directly or via an intermediate polymeric layer or layers, said surface layer consisting essentially of a base adhesive polymer or blend of polymers and an embosser, wherein said shield exhibits a greater bond strength to said outer plastic jacket relative to a similar shield differing only by the absence of embosser in said shield, and wherein said shield exhibits greater heat-seal values relative to a similar shield differing onlv in the absence of embosser in said shield
  • Figure I is a graphical representation of heat sealability testing results for embodiments of the present invention
  • the present invention is a monolayer or multilayer thermoplastic adhesive system
  • Adhesive systems of the present invention contain at least one layer consisting essentially of a base adhesive resin and an amount of embosser sufficient to lower the coefficient of f ⁇ ction ("COF") of the adhesive system and sufficient to emboss the adhesive system
  • adhesive systems of the present invention have a thickness of from 0 1 mil (2.54 ⁇ m) to 5 mil ( 127 ⁇ m) More preferably are adhesive systems with a thickness of from 0 2 mil (5 08 ⁇ m) to 5 mil (127 ⁇ m). and most preferred are adhesive systems with a thickness of from 1 mil (25 4 ⁇ m) to 2 5 mil (63 5 ⁇ m)
  • plastic/metal laminates of the present invention are a plastic/metal laminate formed bv applying adhesive svstems of the present invention to one or both sides ol a metallic substrate in the form of a st ⁇ p or tape
  • the adhesive systems are applied via techniques well known in the art (tor example extrusion coating or lamination )
  • plastic/metal laminates of the present invention have a thickness of from 2 (50 8) to 25 mil (635 ⁇ m), and preferably, from 4 ( 101 6) to 15 mil (381 ⁇ m i
  • Yet another embodiment of the present invention is a composite structure comprising a core component, a shield component surrounding the core, and an outer thermoplastic jacket component surrounding and adhered to the shield component wherein the shield component consists essentially of a plastic/metal laminate ot the present invention
  • Adhesive svstems of the present invention must be capable of adhe ⁇ ng to both the metallic substrate of the plastic/metal laminate and the jacketing component of any composite article into which the laminate may be incorporated
  • the outer or surface layer li e . laver to be adhered to the jacketing component must contain the requisite sufficient amount of embosser
  • layers other than the surface layer do not necessarily contain embosser and may comprise either the same or a different base adhesive resin than the surface layer.
  • base adhesive polymers arc generally those known in the art of producing laminates useful for manufacturing communication cables.
  • Prefened base adhesive polymers include the known normally solid random copolymers of a major proportion ot ethylene with a minor proportion (for example, typically from 1 to 30. preferably from 2 to 20, percent by weight based upon the weight of such copolymer) of an ethylenically unsaturated carboxylic acid monomer.
  • suitable ethylenically unsaturated carboxylic acids which term includes mono- and polybasic acids, acid anhydndes.
  • esters of polybasic acids are acrylic acid, methacrylic acid, crotonic acid, fumanc acid, maleic acid, itaconic acid, maleic anhydride, mono- methyl maleate. monoethyl maleate. monomethyl fumarate. monoethyl fumarate. t ⁇ propylene glycol mono-methyl ether acid maleate, or ethylene glycol mono-phenyl ether acid moleaie.
  • the carboxylic acid monomer is preferably selected from the alpha/beta-eihylenically unsaturated mono- and polycarboxylic acids and acid anhydndes having from 3 to 8 carbon atoms per molecule and panial esters of such poly carboxylic acid wherein the acid moiety has at least one carboxylic acid group and the alcohol moiety has from 1 to 20 carbon atoms.
  • Such copolymers may consist essentially of ethylene and one or more of such ethylenically unsaturated acid or anhydride commoners or can also contain a small amount of other monomer copolymenzable with ethylene.
  • the copolymers can contain other copolymenzable monomers including esters of acrylic acid, methacrylic acid and the like. Random copolymers of such type and methods of making them are readily know in the art.
  • thermoplastic polymers suitable for use in the present invention include the known olefin polymers which are. as a general rule, the ethylenic olefin polymers such as. for example, the various known ethylene homopolymers (for example, ultra low. linear low. low. medium, and high density polyethylene s having a density range of 0.82 to 0.96 g/cc). copolymers having a major proportion of ethylene with a minor proportion of known copolymenzable monomers such as higher (tor example. C3 to C12 alpha-olefins. ethylenically unsaturated ester monomers (for example, vinyl acetate, ethyl acrylate. etc. ).
  • the known olefin polymers which are. as a general rule, the ethylenic olefin polymers such as. for example, the various known ethylene homopolymers (for example, ultra low. linear low. low. medium, and high density polyethylene s having
  • Olefin polymers, copolymers of such type and chemically modified olefin and or copolymers of such type and methods of making them are readily known in the an.
  • the base adhesive resin is a blend of (a) a random copolymer of ethylene with an ethylenically unsaturated carboxylic acid monomer with (b ) at least one different ethylenic olefin and or a copolymer of an ethylenic olefin polymer resin which is not a random ethylene/unsaturated carboxylic acid copolymer.
  • the base adhesive resin compnses from 5 percent to 95 percent of (a), more preferably from 50 percent to 95 percent, and most preferably from 65 percent to 95 percent, based on the weight ot the base adhesive resin
  • the base adhesive resin also comprises from ⁇ percent to 95 percent ot (b). more preferably 0 percent to 50 percent, and most preferably from 5 percent to 20 percent, based on the weight of the base adhesive resin
  • ethylenic olefin polymers that may be modified by copolymerizaiion or graft copolymerizaiion techniques employing an ethylenically unsaturated dicarboxyiic acid anhydride or anhydride precursor, esters of an ethylenically unsaturated dicarboxyiic acid and rubber modified derivatives thereof
  • embossers useful in the present invention are otherwise known in the an as organic or inorganic fillers
  • Embossers suitable for use in the present invention are desirably substantially noncompatibilized. chemically-inen. and insoluble in the base adhesive polymers
  • non- compatibihzed refers to a substantial lack of chemical (for example polymeric) linking or bonding with the base adhesive polymers and preferably such a lack with respect to any other substance in the film
  • chemically men refers to a substantial inability to dissolve in the base adhesive polymers, or preferably, any other components in the base adhesive resin.
  • Being insoluble refers to a substantial inability to dissolve in the base adhesive polymers to an extent such that the physical integnty of the embossed surface is substantially maintained.
  • embosser must be sufficient to substantially lower the COF of the plastic/metal laminate and to emboss the surface of the plastic/metal laminate.
  • embossing the surface of the plastic/metal laminate it is meant that there are bosses on the surface ranging in height from 1/100th to l/4th of the thickness of the adhesive layer(s). Larger bosses result in too rough of a surface and adversely affect film strength and other properties Smaller bosses are generally less effective in reducing the COF of the plastic/metal laminate.
  • the surface layer contains from 0 1 weight percent to 16 weight percent of embosser, more preferably from 2 weight percent to 16 weight percent, and most preferably from 4 weight percent to 8 weight percent.
  • organic embossers suitable for use in the present invention include paniculated polyester, polytetrafluoroethylene ("PTFE”). nylon, polystyrene, high-impact polystyrene ⁇ HIPS”) styreneacrylonit ⁇ le (“SAN”), acrylonitnle-butadiene-styrene CABS”), polycarbonate, etc
  • Suitable inorganic embossers include paniculated graphite, mica, chalk, calcium sulfate. caicium silicate, calcium carbonate, talcum, bentonues. barvtes. kaolin, magnesium aluminum silicates, magnesium silicate, mineral colloids, pyrophylite. sentes.
  • Prefened embossers are non-compatibilized. non-hygroscopic and non-microporous forming in the base adhesive polymers
  • a most prefened embosser is mica, which has the ability of not only effectively imparting a uniform embossed surface to the plastic/metal laminate, but also to improve the adhesion properties of the plastic/metal laminate
  • substantially lowe ⁇ ng the COF of the plastic/metal laminate it is meant that both the resulting static or staning COF and resulting kinetic or sliding COF are lower than the static COF and kinetic COF of an essentially identical plastic/metal laminate differing only by the absence of any embosser
  • the static and kinetic COFs of the plastic/metal laminate were measured using a modified ASTM Dl 894 (See Example I )
  • the static COF of the plastic/metal laminate is at most 040 more preferably at most 0.30.
  • the kinetic COF of the plastic/metal laminate is at most 040. more preferably at most 0.30. and most preferably, at most 0.20 as measured by the modified ASTM D1894
  • Plastic/metal laminates ot the present invention exhibit improved adhesion Adhesion properties were evaluated by measuring the peel strength of the plastic/metal laminate pursuant to a modified ASTM B736 (See Example II) The adhesion of the plastic/metal laminate to matenals typically found in jacketing components was measure using a modified ASTM 1876 (See Example V) Further, it should be understood that when improved adhesion is referred to herein, it is meant that the adhesion is improved relative to the adhesion observed when utilizing essentially identical plastic/metal laminates or composite articles differing only by the absence of embosser.
  • the adhesion between layers of a multilayer adhesive system of the present invention is at least 5 lbs/in. more preferably at least 8 lbs/in ( 142.86 kg/m l. and most preferably at least 12 lbs/in (214.30 kg/m) as measured by the modified ASTM B736
  • the adhesion between a coating layer ( i e. such as an outer insulating jacketing layer in an electncal cable) and plastic/metal laminates ot the present invention is at least 8 lbs/in. more preferably at least 10 lbs/in ( 178 58 kg/m ). and most preferably at least 15 lbs/in (267 87) as measured by the modified ASTM 1876
  • metallic substrates for example, sheets, strips, foils, etc
  • the thickness of metallic substrates (for example, sheets, strips, foils, etc ) employed in the present invention is not c ⁇ tical Foils less than 1 mil may be used as well as relatively thick sheets
  • metallic substrates have a thickness of from 3 (76 2) to 25 mil (635 OOum). and preferably trom 4 mil ( 101 60) to 15 mil (381 OO ⁇ m)
  • the metallic substrate can be composed of a wide variety of metallic matenals such as.
  • metallic substrates tor use herein include those composed of chrome/chrome oxide coated steel (also commonly refened to in the art as tin-free steel ), stainless steel, aluminum, and copper
  • Adhesive systems of the present invention can be applied to the metallic substrates in any convenient fashion which may be desired.
  • conventional extrusion coating techniques may be employed to apply the adhesive system to the chosen metallic substrate.
  • conventional film lamination techniques can also be suitably employed to adhere an adhesive film system to the desired metallic substrate.
  • a combination of conventional coextrusion and film lamination technologies can be employed. For example, it may be desirable to first extrude or coextrude an adhesive system as a film and laminate the film to one or two surfaces of a metallic substrate.
  • Example I In this example. 1.6 mil (40.64 ⁇ m) thick monoiayer adhesive films were created using a conventional blown film process.
  • the adhesive film contained a base adhesive resin and a blend containing high density polyethylene and 40 weight percent mica (i.e.. Micafil 40. available from DuPont Canada).
  • the base adhesive resin was a blend of a random ethylene/acrylic acid (“EAA”) copolymer and an olefin polymer.
  • EAA copolymer contained 6 weight percent acrylic acid based upon the weight of the copolymer and had a melt index of 5.5.
  • the olefin polymer used was either a polyethylene having a melt index of 5.5 and a density of 0.916 g/cc ("LDPE- 1 ") or a polyethylene having a melt index 5.0 and a density of 0.958 g/cc ( "HDPE- 1 ").
  • LDPE- 1 polyethylene having a melt index 5.0 and a density of 0.958 g/cc
  • the amounts of EAA. LDPE- 1. HDPE- 1. and Micafil 40 used in various samples are shown in Table I.
  • va ⁇ ous film samples were laminated to one side of a 7.5 mil (190.5 ⁇ m) thick sheet of aluminum.
  • the indicated monoiayer film was laminated by preheating the metal for one minute in a circulating air oven heated to 300°F ( 148.89°C) and by then pulling the preheated metal sheet and the indicated monoiayer film through a set of rubber nip rolls.
  • the resulting laminate was then post heated for one minute in a circulating air oven heated to 300°F ( 148.89°C)
  • the resulting post heated laminate was allowed to equilibrate in 73°F (22.78°C) air having 50 percent relative humidity for at least 12 hours before any testing was done.
  • Laminate samples were cut using a template into 2.75 inches (6.99cm i by 4.00 inch ( 10.16 cm ) pieces, with the larger dimension in the machine direction.
  • Laminate samples were subjected to coefficient of friction (COF) testing in accordance with ASTM Dl 894 (except that a five- inch per minute crosshead speed, a 2000 gram load cell, a #7 high luster stainless steel plate, and a 1 kg sled are employed, conditioning is at least 12 hours in 50 percent relative humidity air at 73°F (22.78°C .
  • the balance of the film composition contained approximately equal weight percents of anti-blocking agent and heat stabihzing antioxidam agent
  • a control sample was created and tested in the same way as the above examples except that no mica was incorporated in the adhesive film used to make the laminates.
  • Laminates were prepared in the same manner as the laminates in Example I.
  • an additional low density polyethylene having a melt index of 1 9 and a density of 0.925 g cc (“LDPE-2"), was used.
  • the laminates were cut TABLE II
  • the balance of the film composition contained approximately equal weight percents of anti ⁇ blocking agent and heat stabihzing/antioxidant agent.
  • Samples were subjected to 90° heat sealabihty testing in accordance with ASTM B736 (except that a 12- ⁇ nches per minute crosshead speed, a 25 kilograms load cell, a heat seal temperature of 300° F ( 148 89°C). a heat seal pressure of 40 psig, a dwell time of 2 seconds are employed, conditioning is at least 5 minutes in 50 percent relative humidity air at 73° F (22.78°C). and testing is performed on at least 5 test specimens) at standard laboratory conditions
  • control sample was created and tested in the same manner as the other samples.
  • the control did not contain any HDPE- 1 or Micafil 40
  • Samples were prepared and tested in a manner similar to the samples in Examples I and II.
  • the adhesive film used to prepare the samples was a 2.3 mil (58.42 ⁇ m) thick two-layer adhesive film with each layer being of equal thickness.
  • the adhesive film was prepared by a conventional cast film process as opposed to a blown film process.
  • a control sample was prepared using a 2.3 mil (58.42 ⁇ m) thick monoiayer film.
  • Each sample in Example III had one layer contacting the metal having the same composition as the control.
  • the composition of the other layer (surface layer) in each sample is shown in Table III.
  • the samples were tested in the same manner as the samples in Examples I and II and the test results are also shown in Table III.
  • III-3 45.60 30.40 20.00 0.3015 0.3440 1 18.04 92.33
  • the balance of the surface layer composition contained approximately equal weight percents of anti ⁇ blocking agent and heat stabilizing/antioxidant agent.
  • Example III Two sets of samples were prepared in the same manner as the samples in Example III.
  • the samples in one set had a thickness of 1.6 mil (40.64 ⁇ mt and the samples in the other set had a thickness of 2.3 mil (58.42 ⁇ m).
  • Each set of samples contained samples made in accordance with both Sample Ill- control and Sample III-7. The samples were cut into 1 inch by 6 inch pieces with the larger dimension in the machine direction.
  • Samples were prepared in the same manner as the samples in Example III except in that the two-layer adhesive film had a total thickness of 1 6 mil (40 64 ⁇ m) instead of 2 3 mil (58 42 ⁇ ⁇
  • these samples were compression molded to two different sets of 75 mil ( 1.905 ⁇ m) thick sheets of polyethylene to form composite structures
  • the first set of sheets were made of a high density polyethylene IUC3479. available from Union Carbide i and the second set of sheets were made of a medium density polyethylene ( UC8864. available from Union Carbide) Both sets of sheets also contained approximately 2.6 weight percent carbon black
  • a control sample was prepared and tested in the same manner as the other samples except the adhesive film used was a 2.3 mil (58 42 ⁇ m) thick monoiayer film
  • V-A-2 58.80 25.20 12.00 1 1.68 18.08 19.15 18.67 19.00
  • the balance of the surface layer composition contained approximately equal weight percents anti ⁇ blocking agent and heat stabilizing/antioxidant agent.
  • V-B-2 58.80 25.20 12.00 12.35 18.49 18.88 18.33 18.25
  • the balance of the surface layer composition contained approximately equal weight percents anti ⁇ blocking agent and heat stabilizing/antioxidant agent.
  • laminates were prepared in the same manner as Example III.
  • the resulting laminates were then slit to a 1 1 1/16 inch (4.29 c iwidth tape and were shaped and formed into electrical and or communication cables using a conventional cable manufacturing process as described in this application.
  • the laminates used to make the cables are shown in Table VI and some resulting cable processing data are shown in Table VII. TABLE vi LAMINATES USED TO MAKE CABLES
  • the balance of the surface layer composition contained approximately equal weight percents anti-blocking agent and heat stabilizing antioxidant agent.

Landscapes

  • Laminated Bodies (AREA)
  • Insulated Conductors (AREA)

Abstract

L'invention porte sur des stratifiés plastiques/métalliques (un blindage de câble enduit de plastique ou une bande de renforcement, par exemple) présentant des propriétés améliorées en matière de résistance au frottement, d'adhérence et de capacités d'adhérence à chaud, qui comportent au moins un substrat métallique sur la surface duquel a été collée, au moins, une couche adhésive thermoplastique pourvue de granulations en quantité suffisante tant pour abaisser de façon notable le coefficient de frottement du stratifié que pour marquer la surface du stratifié plastique/métallique.
EP96907035A 1995-02-10 1996-02-09 Stratifies plastiques/metalliques ameliores Withdrawn EP0808245A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US38639895A 1995-02-10 1995-02-10
US386398 1995-02-10
PCT/US1996/001809 WO1996024487A1 (fr) 1995-02-10 1996-02-09 Stratifies plastiques/metalliques ameliores

Publications (1)

Publication Number Publication Date
EP0808245A1 true EP0808245A1 (fr) 1997-11-26

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Country Link
EP (1) EP0808245A1 (fr)
JP (1) JPH10513412A (fr)
CN (1) CN1173845A (fr)
AU (1) AU698769B2 (fr)
CA (1) CA2211610A1 (fr)
IL (1) IL117101A0 (fr)
TW (1) TW368472B (fr)
WO (1) WO1996024487A1 (fr)

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JP4580079B2 (ja) * 2000-09-21 2010-11-10 昭和電工パッケージング株式会社 深絞り成形用アルミニウム箔複合材の製造方法およびその成形方法
DE102010042862B4 (de) * 2010-10-25 2017-05-11 Battenfeld-Cincinnati Germany Gmbh Vorrichtung zum Führen und Formen eines extrudierten Kunststoffstranges
JP6805516B2 (ja) * 2015-03-23 2020-12-23 住友ベークライト株式会社 多層フィルム

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CA2211610A1 (fr) 1996-08-15
MX9706097A (es) 1997-10-31
AU5022196A (en) 1996-08-27
IL117101A0 (en) 1996-06-18
TW368472B (en) 1999-09-01
AU698769B2 (en) 1998-11-05
WO1996024487A1 (fr) 1996-08-15
JPH10513412A (ja) 1998-12-22
CN1173845A (zh) 1998-02-18

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