NO781871L - MATERIAL FOR PREPARATION OF FOAMED INSULATION - Google Patents
MATERIAL FOR PREPARATION OF FOAMED INSULATIONInfo
- Publication number
- NO781871L NO781871L NO78781871A NO781871A NO781871L NO 781871 L NO781871 L NO 781871L NO 78781871 A NO78781871 A NO 78781871A NO 781871 A NO781871 A NO 781871A NO 781871 L NO781871 L NO 781871L
- Authority
- NO
- Norway
- Prior art keywords
- parts
- mixture
- polyethylene
- cross
- stated
- Prior art date
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 title description 3
- 239000000203 mixture Substances 0.000 claims abstract description 25
- 239000006260 foam Substances 0.000 claims abstract description 3
- 239000004698 Polyethylene Substances 0.000 claims description 21
- -1 polyethylene Polymers 0.000 claims description 21
- 229920000573 polyethylene Polymers 0.000 claims description 21
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000004156 Azodicarbonamide Substances 0.000 claims description 6
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 claims description 6
- 235000019399 azodicarbonamide Nutrition 0.000 claims description 6
- 239000003431 cross linking reagent Substances 0.000 claims description 6
- 239000003380 propellant Substances 0.000 claims description 6
- WHHGLZMJPXIBIX-UHFFFAOYSA-N decabromodiphenyl ether Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1OC1=C(Br)C(Br)=C(Br)C(Br)=C1Br WHHGLZMJPXIBIX-UHFFFAOYSA-N 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 239000003063 flame retardant Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- YXUGBTHHXGQXPO-UHFFFAOYSA-N 1-tert-butylperoxy-3-(2-tert-butylperoxypropan-2-yl)benzene Chemical group CC(C)(C)OOC1=CC=CC(C(C)(C)OOC(C)(C)C)=C1 YXUGBTHHXGQXPO-UHFFFAOYSA-N 0.000 claims 1
- 229910052787 antimony Inorganic materials 0.000 claims 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims 1
- 229920002959 polymer blend Polymers 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- MJSQSKNNMZQLQZ-UHFFFAOYSA-N 1-butylperoxy-2-propan-2-ylbenzene Chemical compound CCCCOOC1=CC=CC=C1C(C)C MJSQSKNNMZQLQZ-UHFFFAOYSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/06—Ethers; Acetals; Ketals; Ortho-esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/021—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
Landscapes
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Thermal Insulation (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Organic Insulating Materials (AREA)
Abstract
Blanding for fremstilling av skumisola sjonMixture for making foam insulation
Description
Oppfinnelsen angår en blanding på polymerbasis for fremstilling av oppskummet tverrbundet isolasjon for metallrør og elektriske ledere. The invention relates to a polymer-based mixture for the production of foamed cross-linked insulation for metal pipes and electrical conductors.
For isolasjonsformål forsynes elektriske ledere og metallrør med plastlag. For å øke isolasjonsverdien og spare polymermaterialet, har man i det senere mer og mer anvendt opp-skummede materialer eller skumplast som isolasjonsmaterialer; For insulation purposes, electrical conductors and metal pipes are provided with a plastic layer. In order to increase the insulation value and save the polymer material, foamed materials or foam plastics have been used more and more in the past as insulation materials;
men hverken temperaturbestandighet eller mekanisk bestandighet eller oppskummingsgrad har hittil vært tilfredsstillende. but neither temperature resistance nor mechanical resistance nor degree of foaming have so far been satisfactory.
Av disse grunner er det allerede foreslått å tverr-binde polymermaterialene. For these reasons, it has already been proposed to cross-link the polymer materials.
Oppfinnelsens formål er å tilveiebringe en blandingThe object of the invention is to provide a mixture
som er bearbeidbar i en' ekstruder og kan oppskummes til høy oppskummingsgrad og forholdsvis lav volumvekt og derved gir både materialbesparelse og høy temperaturfasthet. which can be processed in an extruder and can be foamed to a high degree of foaming and a relatively low volume weight, thereby providing both material savings and high temperature resistance.
Løsningen, på denne oppgave er en blanding som bestårThe solution to this task is a mixture that consists
av 0 - 80 deler hardpolyethylen, 100 - 20 deler mykpolyethylen,of 0 - 80 parts hard polyethylene, 100 - 20 parts soft polyethylene,
1 til 5 deler drivmiddel og 0,1 - 2 deler.tverrbindingsmiddel. 1 to 5 parts propellant and 0.1 - 2 parts crosslinking agent.
Som hardpolyethylen brukes med fordel en polyethylen som markeds-føres under betegnelsen "Lupolen 5011 K". Som mykpolyethylen brukes en polyethylen med fordel som markedsføres under vare-market "Lupolen 2425 MX". Det valgte forhold mellom hardpolyethylen og mykpolyethylen retter seg etter de krav som stilles til isolasjonsmaterialet. Mens en blanding med høyere andel hardpolyethylen er hardere og utmerker seg ved høyere temperar-bestandighet, består fordelen ved å bruke relativt mer mykpolyethylen av bedre bøyelighet. Særlig når rørene eller ledningene skal brukes til innredning av boliger, har det vist seg gunstig å tilsette blandingen 4 -' 15 deler brannhiridrende middel. Ved å tilsette det brannhindrende eller flammedempende middel redu-seres isolasjonskappens antennelighet vesentlig. Som drivmiddel A polyethylene that is marketed under the name "Lupolen 5011 K" is advantageously used as hard polyethylene. As soft polyethylene, a polyethylene is used with advantage which is marketed under the trade name "Lupolen 2425 MX". The chosen ratio between hard polyethylene and soft polyethylene is based on the requirements placed on the insulation material. While a mixture with a higher proportion of hard polyethylene is harder and is characterized by higher temperature resistance, the advantage of using relatively more soft polyethylene consists of better flexibility. Especially when the pipes or cables are to be used for furnishing homes, it has proven beneficial to add the mixture 4-15 parts fire retardant. By adding the fire-preventing or flame-reducing agent, the flammability of the insulation jacket is significantly reduced. As a propellant
har altså dicarbonamid vist seg særlig gunstig. Tverrbindings-. midlet er med fordel en 1,3-bistert. butylperoxyisopropylbenzen. Kombinasjonen av dette drivmiddel og nevnte tverrbindingsmiddel dicarbonamide has thus proved particularly beneficial. Cross-linking. the agent is advantageously a 1,3-bister. butylperoxyisopropylbenzene. The combination of this propellant and said cross-linking agent
■ sikrer at polymerblandingen ved oppvarming først i det minste ■ ensures that the polymer mixture when heated first at least
delvis tverrbindes og først deretter oppskummes. På grunn av dette forhold oppnås den relativt lave volumvekt .på f.eks. partially cross-linked and only then foamed. Due to this ratio, the relatively low volumetric weight is achieved on e.g.
200 kg/m . Som flammebeskyttende middel har man funnet en blanding av 3 - 10 deler decabromdifenylether og 1 - 5 deler antimontrioxyd som særlig virksom. En blanding som har vist seg optimal både med hensyn til bøyeevne og temperaturfasthet samt kjemisk bestandighet består av 50 - 70 deler hardpolyethylen, 30 - 50 deler mykpolyethylen, 2-4 deler azodicarbonamid, 0,3 - 200 kg/m . As a flame retardant, a mixture of 3 - 10 parts decabromodiphenyl ether and 1 - 5 parts antimony trioxide has been found to be particularly effective. A mixture that has proven to be optimal both with regard to bending capacity and temperature resistance as well as chemical resistance consists of 50 - 70 parts hard polyethylene, 30 - 50 parts soft polyethylene, 2-4 parts azodicarbonamide, 0.3 -
0,7 deler 1,3-bis-tert.-butylperoxyisopropylbenzen, 4-7 deler decabromdifenylether og 3-4,5 deler antimontrioxyd. 0.7 parts of 1,3-bis-tert.-butylperoxyisopropylbenzene, 4-7 parts of decabromodiphenyl ether and 3-4.5 parts of antimony trioxide.
Oppfinnelsen skal beskrives nærmere ved et eksempel. The invention shall be described in more detail by means of an example.
En blanding av 60 deler hardpolyethylen (Lupolen 5011 K), 40 deler mykpolyethylen (Lupolen 2425 MX), 3 deler azodicarbonamid, 0,5 deler 1,3-bis-tert.butylperoxydisopropylbenzen, 5,7 deler decabromdifenylether og 3,8 deler antimontrioxyd som eventuélt er tilsatt små mengder aldringsbeskyttelsesmiddel, blandes omhyggelig i en blander og oppvarmes til en temperatur på 130° C. Fra blanderen går plastblandingen inn i ekstruderhodet som inneholder en dreibart opplagret dor.■ Doren eller kjernen har en gjennomgående aksial boring hvorigjennom metall-røret eller kobbertråden som skal isoleres, føres gjennom. Under transporten i ekstruderhodet fra påfyllingsåpningen til munnstykket oppvarmes polymerblandingen på grunn av de herskende' skjærkrefter ved blandingen. Polymerblandlngens temperatur bør ved utgang fra munnstykket være 190 - 200° C. Allerede ved 190° C begynner dekomponeringen av tverrbindingsmidlet som fører til at smeiten begynner å tverrbindes kjemisk. Ved ca. 180° C spaltes azodicarbonamidet og gir en gass som virker oppskummen-de. På grunn av at tverrbindingen av polymerblandingen allerede har begynt, har smeltens viskositetøket slik at en større del av de frigjorte gasser fra azodicarbonamidet blir tilbake i polymerblandingen og man derved kan øke oppskummingsgraden vesentlig. Ved utgang fra ekstruderen bør tverrbindingsgraden A mixture of 60 parts hard polyethylene (Lupolen 5011 K), 40 parts soft polyethylene (Lupolen 2425 MX), 3 parts azodicarbonamide, 0.5 parts 1,3-bis-tert.butylperoxydiisopropylbenzene, 5.7 parts decabromodiphenyl ether and 3.8 parts antimony trioxide which may have small amounts of anti-aging agent added, is carefully mixed in a mixer and heated to a temperature of 130° C. From the mixer, the plastic mixture enters the extruder head which contains a rotatably supported mandrel.■ The mandrel or core has a continuous axial bore through which the metal tube or the copper wire to be insulated is passed through. During the transport in the extruder head from the filling opening to the nozzle, the polymer mixture is heated due to the prevailing shear forces of the mixture. The temperature of the polymer mixture at the exit from the nozzle should be 190 - 200° C. Already at 190° C, the decomposition of the cross-linking agent begins, which causes the melt to begin to cross-link chemically. At approx. At 180° C, the azodicarbonamide decomposes and gives a gas that appears foamy. Due to the fact that the cross-linking of the polymer mixture has already begun, the viscosity of the melt has increased so that a larger part of the released gases from the azodicarbonamide remain in the polymer mixture and the degree of foaming can thereby be increased significantly. At the exit from the extruder, the degree of cross-linking should
vær-e 10 % slik at blandingen ut fra munnstykket ikke drypper av fra røret eller kobbertråden. Ved den begynnende kjemiske nett-verksbinding av blandingen kan man få et polymersjikt med jevn •veggtykkelse over det hele. Etter utgang fra ekstruderen tverrbindes blandingen videre og man kan oppnå en tverrbindingsgrad på 50 %. be 10% so that the mixture from the nozzle does not drip from the pipe or copper wire. With the initial chemical cross-linking of the mixture, a polymer layer with uniform wall thickness can be obtained over the whole. After exiting the extruder, the mixture is further cross-linked and a cross-linking degree of 50% can be achieved.
Blandingen egner seg med særlig fordel til fremstilling av isolerende sjikt 1 til husinstallsjonsrør 2 av kobber (se fig. 1). Blandingen kan også brukes som utgangsst<p>ff for isolasjonskapper 3 omkring svakstrømsledninger 4' (se fig. 2). The mixture is particularly suitable for the production of insulating layer 1 for house installation pipes 2 made of copper (see fig. 1). The mixture can also be used as a starting material for insulation jackets 3 around low-current lines 4' (see fig. 2).
Blandingen utmerker seg særlig ved at det kan oppnås usedvanlig høy oppskummingsgrad, dvs. lav volumvekt, på 200 The mixture is particularly distinguished by the fact that an exceptionally high degree of foaming can be achieved, i.e. low volume weight, of 200
kg/m og under det. Den mekaniske fasthet er bare noe mindre enn for ren polyethylen. En vesentlig fordel som særlig er av betydning ved installasjonsrør er den høye temperåturfasthet. Isolerende sjikt fremstilt i henhold til oppfinnelsen er tempe-raturbestandige opp til 130° C. kg/m and below. The mechanical strength is only slightly less than that of pure polyethylene. A significant advantage that is particularly important for installation pipes is the high temperature resistance. Insulating layers produced according to the invention are temperature-resistant up to 130°C.
Claims (7)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2724454A DE2724454C2 (en) | 1977-05-31 | 1977-05-31 | Mixture for the production of foamed insulation |
Publications (1)
Publication Number | Publication Date |
---|---|
NO781871L true NO781871L (en) | 1978-12-01 |
Family
ID=6010272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO78781871A NO781871L (en) | 1977-05-31 | 1978-05-30 | MATERIAL FOR PREPARATION OF FOAMED INSULATION |
Country Status (14)
Country | Link |
---|---|
JP (1) | JPS53149267A (en) |
AR (1) | AR213333A1 (en) |
AT (1) | AT368538B (en) |
BE (1) | BE867673A (en) |
CH (1) | CH630398A5 (en) |
DE (1) | DE2724454C2 (en) |
DK (1) | DK499077A (en) |
ES (1) | ES463362A1 (en) |
FR (1) | FR2393408A1 (en) |
GB (1) | GB1552204A (en) |
IT (1) | IT1093099B (en) |
NL (1) | NL7709996A (en) |
NO (1) | NO781871L (en) |
SE (1) | SE7806200L (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2915188C2 (en) * | 1979-04-10 | 1983-02-17 | Siemens AG, 1000 Berlin und 8000 München | Plastic-insulated electrical cable with a flame-retardant inner sheath |
DE3424269C2 (en) * | 1984-06-30 | 1994-01-27 | Krupp Ag | Device for producing reinforced profiles and reinforced hoses |
US6365268B1 (en) | 2000-06-05 | 2002-04-02 | Fmc Corporation | Deep sea insulation material |
EP1070906A1 (en) * | 1999-07-16 | 2001-01-24 | Fmc Corporation | Deep sea insulation material |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1640350A1 (en) * | 1966-11-11 | 1970-09-17 | Kabel Metallwerke Ghh | Process for the production of telecommunication wires with a foam insulation |
DE2359876C3 (en) * | 1973-01-17 | 1984-08-30 | Sumitomo Electric Industries, Ltd., Osaka | Process for the production of high frequency coaxial cables |
DE2615317C3 (en) * | 1976-04-06 | 1979-08-02 | Aeg-Telefunken Kabelwerke Ag, Rheydt, 4050 Moenchengladbach | Electrical insulation material for communication cables |
-
1977
- 1977-05-31 DE DE2724454A patent/DE2724454C2/en not_active Expired
- 1977-08-22 CH CH1027077A patent/CH630398A5/en not_active IP Right Cessation
- 1977-09-06 AT AT0640377A patent/AT368538B/en not_active IP Right Cessation
- 1977-09-12 NL NL7709996A patent/NL7709996A/en not_active Application Discontinuation
- 1977-10-19 ES ES463362A patent/ES463362A1/en not_active Expired
- 1977-10-20 FR FR7731653A patent/FR2393408A1/en active Granted
- 1977-10-25 IT IT51552/77A patent/IT1093099B/en active
- 1977-10-31 AR AR269789A patent/AR213333A1/en active
- 1977-11-10 DK DK499077A patent/DK499077A/en not_active Application Discontinuation
- 1977-12-13 GB GB51780/77A patent/GB1552204A/en not_active Expired
-
1978
- 1978-02-22 JP JP1864578A patent/JPS53149267A/en active Granted
- 1978-05-30 NO NO78781871A patent/NO781871L/en unknown
- 1978-05-30 SE SE7806200A patent/SE7806200L/en unknown
- 1978-05-31 BE BE188208A patent/BE867673A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES463362A1 (en) | 1978-07-16 |
ATA640377A (en) | 1982-02-15 |
AT368538B (en) | 1982-10-25 |
NL7709996A (en) | 1978-12-04 |
FR2393408B1 (en) | 1982-12-10 |
DK499077A (en) | 1978-12-01 |
IT1093099B (en) | 1985-07-19 |
AR213333A1 (en) | 1979-01-15 |
JPS6224450B2 (en) | 1987-05-28 |
CH630398A5 (en) | 1982-06-15 |
DE2724454A1 (en) | 1978-12-14 |
GB1552204A (en) | 1979-09-12 |
JPS53149267A (en) | 1978-12-26 |
BE867673A (en) | 1978-11-30 |
SE7806200L (en) | 1978-12-01 |
DE2724454C2 (en) | 1986-08-14 |
FR2393408A1 (en) | 1978-12-29 |
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