EP0696808B1 - Winding-type noise-suppressing high-tension resistive cord - Google Patents

Winding-type noise-suppressing high-tension resistive cord Download PDF

Info

Publication number
EP0696808B1
EP0696808B1 EP19950111676 EP95111676A EP0696808B1 EP 0696808 B1 EP0696808 B1 EP 0696808B1 EP 19950111676 EP19950111676 EP 19950111676 EP 95111676 A EP95111676 A EP 95111676A EP 0696808 B1 EP0696808 B1 EP 0696808B1
Authority
EP
European Patent Office
Prior art keywords
polymer
winding
core
tension resistive
type noise
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.)
Expired - Lifetime
Application number
EP19950111676
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0696808A2 (en
EP0696808A3 (enrdf_load_stackoverflow
Inventor
Makoto C/O Sumitomo Higashikozono
Genya C/O Sumitomo Kawakita
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.)
Sumitomo Wiring Systems Ltd
Original Assignee
Sumitomo Wiring Systems Ltd
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 Sumitomo Wiring Systems Ltd filed Critical Sumitomo Wiring Systems Ltd
Publication of EP0696808A2 publication Critical patent/EP0696808A2/en
Publication of EP0696808A3 publication Critical patent/EP0696808A3/en
Application granted granted Critical
Publication of EP0696808B1 publication Critical patent/EP0696808B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0063—Ignition cables

Definitions

  • the present invention relates to a winding-type noise-suppressing high-tension resistive cord to be used as an ignition cable for an internal combustion engine of an automotive vehicle and the like.
  • High-tension resistive cords for transmitting a high voltage generated at an ignition coil to a spark plug directly or through a distributer have been required to have a low electric transmission loss, a good noise suppressing effect, and high resistance to heat and voltage.
  • currently used high-tension resistive cords are of two types: a string-type high-tension resistive cord which includes fibers impregnated with carbon; and a winding-type high-tension resistive cord which includes a metal small-gage wire having a high specific resistance and wound about a core made of a magnetic material or the like.
  • the winding-type high-tension resistive cord which comprises a reinforcing string 51 of aramid fibers, glass fibers or the like; a core 52 formed by extrusion-coating the reinforcing string 51 with a base polymer including ferrite powder mixed therein; a resistance wire 53 coiled around the core 52; an insulating layer 54 for extrusion-coating the core 52 and the resistance wire 53; a braid 55 for coating the insulating layer 54; and an outermost sheath 56 for coating the braid 55 (Japanese Utility Model Publication No. 1-32253 (1989)).
  • the material of the core 52 generally used is fluororubber and silicone rubber which are a base polymer of high heat-resistance and high strength (Japanese Utility Model Publication No. 60-28002 (1985) and Japanese Utility Model Publication No. 5-20467 (1993)).
  • fluororubber and silicone rubber which are a base polymer of high heat-resistance and high strength
  • EPR ethylene propylene rubber
  • the EPR used as the base polymer of the core does not provide a suitable hardness when it is unvulcanized, failing to cause the resistance wire to suitably resiliently dent the surface of the core when the resistance wire is wound around the core of the unvulcanized base polymer. Further, vulcanized EPR has a low strength and low elongation, resulting in the core torn off during the removal of the insulating layer and cracks in the core when bent for connection to the terminal.
  • Document EP-A-0 329 188 which is considered to represent the most relevant state of the art discloses a winding-type noise-suppressing high-voltage resistive cord comprising a core, a resistance wire coiled around the core and an insulating layer for coating said core around which the resistance wire is coiled.
  • the core is formed as ferrite rubber layer comprising a base polymer, for example ethylene-propylene, which contains ferrite powder and electrically conductive particles.
  • Object of the present invention is to improve a winding-type noise-suppressing high-voltage cord according to the preamble of claim 1 in such a way that tensile strength and hardness of a core of the cord and adhesion of a resistance wire on the core are increased.
  • the reinforcing polymer is ethylene-vinyl acetate copolymer.
  • the reinforcing polymer is polyethylene.
  • the reinforcing polymer is polypropylene.
  • the presence of the reinforcing polymer having the good compatibility with EPR allows the unvulcanized core to have a strength suitable to coil the resistance wire therearound.
  • the vulcanization causes cross-linkage in the EPR, in the reinforcing polymer, and between the EPR and reinforcing polymer to increase the strength of the vulcanized core. Therefore, the winding-type noise-suppressing high-tension resistive cord having physical properties identical with those of the conventional cord including the core of fluororubber and silicone rubber is fabricated at low costs.
  • a winding-type noise-suppressing high-tension resistive cord 10 comprises a reinforcing string 11 including three twisted 1000-denier aramid yarns, and a core 12 of a 1.3 mm outer diameter formed by extrusion-coating the reinforcing string 11 with a polymer including ferrite powder mixed therein.
  • the ferrite powder preferably includes Mn-Zn based ferrite such as Mn-Zn-Fe (manganese-zinc-ferric oxide).
  • the polymer is a blend of ethylene-propylene-diene terpolymer (EPDM) which is one of the EPR as a base polymer and ethylene-vinyl acetate copolymer (EVA) which is EPDM-compatible and to be covulcanized during vulcanization as a reinforcing polymer.
  • EPDM ethylene-propylene-diene terpolymer
  • EVA ethylene-vinyl acetate copolymer
  • the core 12 contains 100 parts by weight of the blend polymer and 500 parts by weight of the ferrite powder.
  • a 50 ⁇ m Ni-Cr resistance wire 13 is coiled 7200 times per meter around the core 12, with the blend polymer unvulcanized. Since the unvulcanized blend polymer has a suitable hardness, the resistance wire 13 is half embedded in the core 12 as shown in Fig. 2. The resistance wire 13 is held half embedded in the core 12 by subsequent vulcanization (under conditions of 160°C.; 30 minutes).
  • An insulating layer 14 is formed by EPDM extrusion coating on the core 12 around which the resistance wire 13 is wound.
  • the insulating layer 14 is coated with a reinforcing braid 15 made of glass yarn, and the reinforcing braid 15 is coated with a sheath 16 made of EPDM.
  • the reinforcing polymer is not limited to EVA but may be polypropylene (PP) and polyethylene (PE), for example.
  • EVA and PE are suitable.
  • the blend ratio of EPDM to PE is within the range of about 80 to about 70 parts by weight of the former to, correspondingly, about 20 to about 30 parts by weight of the latter (that is, the blend polymer includes about 20 to about 30 % by weight of the PE) and the blend ratio of EPDM to EVA is within the range of about 80 to about 40 parts by weight of the former to, correspondingly, about 20 to about 60 parts by weight of the latter (that is, the blend polymer includes about 20 to about 60 % by weight of the EVA), satisfactory extrusion workability is obtained if about 100 to about 600 parts by weight of the ferrite powder is mixed, and the physical properties of the unvulcanized polymer are a hardness of 75 to 85 and an elongation of 50 % or more. This prevents the core 12 from being cracked when the resistance wire 13 is wound therearound and from being torn off.
  • the obtained physical properties of the vulcanized polymer are a strength of 5 MPa or more and an elongation of 50 % or more. This prevents the core 12 from being torn off and cracked when the insulating layer 14 is stripped and the core is bent for connection between the cord and the metal terminal.

Landscapes

  • Insulated Conductors (AREA)
  • Communication Cables (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
EP19950111676 1994-08-08 1995-07-25 Winding-type noise-suppressing high-tension resistive cord Expired - Lifetime EP0696808B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP186073/94 1994-08-08
JP6186073A JP3013710B2 (ja) 1994-08-08 1994-08-08 巻線型雑音防止高圧抵抗電線

Publications (3)

Publication Number Publication Date
EP0696808A2 EP0696808A2 (en) 1996-02-14
EP0696808A3 EP0696808A3 (enrdf_load_stackoverflow) 1996-03-27
EP0696808B1 true EP0696808B1 (en) 1999-03-17

Family

ID=16181919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950111676 Expired - Lifetime EP0696808B1 (en) 1994-08-08 1995-07-25 Winding-type noise-suppressing high-tension resistive cord

Country Status (4)

Country Link
EP (1) EP0696808B1 (enrdf_load_stackoverflow)
JP (1) JP3013710B2 (enrdf_load_stackoverflow)
CN (1) CN1121632A (enrdf_load_stackoverflow)
DE (1) DE69508323T2 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108129743A (zh) * 2017-12-20 2018-06-08 苏州希普拉斯新材料有限公司 新能源汽车用无卤阻燃高弹性聚烯烃电缆料

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6054028A (en) * 1996-06-07 2000-04-25 Raychem Corporation Ignition cables
JPH1068849A (ja) * 1996-08-29 1998-03-10 Tokin Corp 光ファイバケーブル
JP4508401B2 (ja) * 2000-11-20 2010-07-21 三井化学株式会社 アロイ押出成形品の製造方法、その製造装置および成形品
CN102385946A (zh) * 2010-09-04 2012-03-21 深圳市沃尔核材股份有限公司 一种屏蔽电线及制造方法
US20130133921A1 (en) * 2011-11-28 2013-05-30 Prestolite Wire Llc Anti-capillary resistor wire

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58103415U (ja) 1981-12-31 1983-07-14 株式会社デンソー 低静電容量巻線型高圧抵抗電線
JPS6028002U (ja) 1983-08-03 1985-02-25 株式会社　堀技術研究所 真空保持弁
JPH01211807A (ja) * 1988-02-19 1989-08-25 Yazaki Corp 巻線型高圧抵抗電線
JPH0770249B2 (ja) * 1989-11-16 1995-07-31 矢崎総業株式会社 雑音防止用高圧抵抗電線
JPH0520467U (ja) 1991-01-04 1993-03-12 日本電気株式会社 フアクシミリ装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108129743A (zh) * 2017-12-20 2018-06-08 苏州希普拉斯新材料有限公司 新能源汽车用无卤阻燃高弹性聚烯烃电缆料

Also Published As

Publication number Publication date
EP0696808A2 (en) 1996-02-14
DE69508323D1 (de) 1999-04-22
JP3013710B2 (ja) 2000-02-28
DE69508323T2 (de) 1999-11-11
CN1121632A (zh) 1996-05-01
EP0696808A3 (enrdf_load_stackoverflow) 1996-03-27
JPH0850816A (ja) 1996-02-20

Similar Documents

Publication Publication Date Title
EP0329188B1 (en) Noise-suppressing high voltage cable and method of manufacturing thereof
JPH0770249B2 (ja) 雑音防止用高圧抵抗電線
EP0690459A1 (en) Coil type high-tension resistive cable for preventing noise
EP0696808B1 (en) Winding-type noise-suppressing high-tension resistive cord
CN101263566B (zh) 具有低阻抗和高感应系数的点火线
JP2943621B2 (ja) 巻線型雑音防止高圧抵抗電線
US6259030B1 (en) Electrical cables adapted for high voltage applications
CN205959643U (zh) 一种耐低温拖曳软电缆
EP0644556B1 (en) Winding-type high-voltage resistant, resistive cord for preventing noises
CN101156220A (zh) 点火装置
KR102381550B1 (ko) 와이어 하네스용 전선 구조체
EP0696033A2 (en) Winding-type noise-suppressing high-tension resistive cord
US7282639B2 (en) Ignition wire having low resistance and high inductance
WO2002001580A1 (en) High-conductivity carbon-fiber cable with protected core
US6252172B1 (en) Electrical cable adapted for high-voltage applications
EP0655750B1 (en) Coil type high-voltage resistive cable for preventing noise
KR200203666Y1 (ko) 차량의 점화플러그용 점화케이블
CN208036186U (zh) 一种汽车仪表线束
JPH01319208A (ja) 雑音防止電線
JPS6128333Y2 (enrdf_load_stackoverflow)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19960222

17Q First examination report despatched

Effective date: 19960514

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 69508323

Country of ref document: DE

Date of ref document: 19990422

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20010712

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010716

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010725

Year of fee payment: 7

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020725

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030201

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020725

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030331

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST