CN103298996A - Compact steel cord - Google Patents

Compact steel cord Download PDF

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Publication number
CN103298996A
CN103298996A CN2011800645947A CN201180064594A CN103298996A CN 103298996 A CN103298996 A CN 103298996A CN 2011800645947 A CN2011800645947 A CN 2011800645947A CN 201180064594 A CN201180064594 A CN 201180064594A CN 103298996 A CN103298996 A CN 103298996A
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Prior art keywords
steel cord
diameter
intermediate layer
silk
core
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CN2011800645947A
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CN103298996B8 (en
CN103298996B (en
Inventor
程志超
�田�浩
张爱军
罗奕文
唐秋菊
潘雷
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Bekaert NV SA
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Bekaert NV SA
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Priority to CN201180064594.7A priority Critical patent/CN103298996B8/en
Priority claimed from PCT/EP2011/072074 external-priority patent/WO2012095224A1/en
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    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0606—Reinforcing cords for rubber or plastic articles
    • D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
    • D07B1/0633—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration having a multiple-layer configuration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2001—Wires or filaments
    • D07B2201/2006—Wires or filaments characterised by a value or range of the dimension given
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2024—Strands twisted
    • D07B2201/2029—Open winding
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2051—Cores characterised by a value or range of the dimension given
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2401/00—Aspects related to the problem to be solved or advantage
    • D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
    • D07B2401/208—Enabling filler penetration

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  • Ropes Or Cables (AREA)

Abstract

A steel cord (20) adapted for the reinforcement of elastomer products, comprises a single core filament (22) with a core filament diameter D0 and 3N layer filaments (24, 26) twisted around the core filament in the same direction and with the same step. N ranges from four to five. The 3N layer filaments are arranged in an intermediate layer of N filaments (24) having an intermediate layer diameter D1 and in an outer layer of 2N filaments (26) having an outer layer diameter D2 and the steel cord (20) has the following characteristics (D0, D1, D2 in mm): D0<=D1<D2.

Description

Tight shaped steel cord
Technical field
The present invention relates to be applicable to the steel cord that strengthens elastomer product, be particularly useful for strengthening medium-sized casingply to heavy truck and passenger vehicle radial tire.The steel cord comprises a core silk with core filament diameter, and two-layer around the core silk with identical sth. made by twisting to the layer silk that twists with the identical lay pitch.
Background technology
Such steel cord known in the state of the art, wherein, with identical sth. made by twisting to the identical lay pitch all steel wires being twisted together; Because this steel cord can hold a large amount of steel wires in limited cross-sectional area, thereby forms cross-sectional configuration closely, therefore this steel cord is called as " closely shaped steel cord ".
In the grouping of tight shaped steel cord, following structure is widely used in strengthening in the elastomeric field:
-1×d c|18×d l?CC
-1×d c|15×d l?CC
1 * d c| 18 * d lCC is a kind of tight type cord, comprises that has a core filament diameter d cThe core silk, and 18 have a layer filament diameter d lLayer silk, layer silk arranged according to being made of the intermediate layer 6 steel wires and constituting outer field mode by 12 steel wires.This kind tight type cord is disclosed in patent EP-B1-0 627 520.Because the canonical form of the cross section of this steel cord is center symmetry and highly stable regular hexagon, so this tight type cord has constituted stable structure.
Patent WO-A1-03 069 055 disclosed 1 * d c| 15 * d lThe CC cord comprises a core silk with core filament diameter, and 15 layer silks that have layer filament diameter and twist around the core silk.15 layer silks are arranged according to being made of the intermediate layer five steel wires and constituting outer field mode by ten steel wires.
The core filament diameter is less than layer filament diameter.Though it is not this structure is possible technically, always practical technically.Because the cross section of cord has typical non-centrosymmetrical regular pentagon structure, therefore this tight type cord does not always constitute stable structure, and it is subjected to the interference of twisting machine and disequilibrium easily in manufacture process.Can occur converse suddenly or kink.In addition, it is transformed into (1+4+11) CC structure or (1+6+9) CC structure sometimes, rather than the front describe in desired (1+5+10) CC structure.This can make an explanation with following explanation: with required 0.2+(5+10) * 0.245mm CC structure is example, has small slit " g " as shown in Figure 1a between adjacent monofilament.Yet, in construction process, form big slit " G " shown in Fig. 1 b when each micro gap pools together, and " G " just produced the 0.2+(4+11 shown in Fig. 1 c when entering even as big as a rhizoid that allows the intermediate layer) * 0.245mm CC structure.Because this undefined structure, rubber osmosis has been subjected to very big influence.Ten outer silks become so closely, to such an extent as to can't make required rubber osmosis enter inside, this has caused aqueous vapor to move along the steel cord with along steel cord internal voids.Therefore, corrosion resistance is not fine.Because this mass defect of the steel cord that structure itself causes can't be avoided by adjustment technology parameter in manufacture process.
Summary of the invention
The present invention is intended to avoid the above-mentioned shortcoming of prior art.
An object of the present invention is to provide a kind of stabilized steel cord structure with anti-fatigue ability of acceptable level.
Another object of the present invention provides a kind of steel cord with good corrosion resistance.
According to the present invention, provide a kind of steel cord that strengthens elastomer product that is applicable to.This steel cord comprises that has a core filament diameter D 0The core silk, and with identical sth. made by twisting to the 3N root layer silk that twists around the core silk with the identical lay pitch, the scope of N is four to five.3N root layer silk arrangement is: have intermediate layer diameter D by the N root 1Steel wire constitute the intermediate layer, have outer diameter D by the 2N root 2Steel wire constitute outerly, and the steel cord has following characteristic (D 0, D 1, D 2Unit: mm):
D 0≤D 1<D 2
Cord of the present invention is a kind of tight type cord.This cord has good corrosion resistance, high breaking load and less diameter.
N is preferably five, this means that this steel cord comprises ten six roots of sensation silks.Five are better than four, and this is because five rhizoids in intermediate layer are filled the intermediate layer better with stable manner.
In first preferred embodiment of the present invention, the core silk has identical diameter (D with the intermediate layer silk 0=D 1).First preferred embodiment also can satisfy following formula:
0.76<（D 0/D 2）<0.93。
Because diameter compares D 0/ D 2Optimization, make via intermediate layer and outer and even reach the rubber osmosis optimum at center, this has guaranteed very high corrosion stability and has prevented from corroding possible expansion.
In addition, by selecting diameter to compare D 0/ D 2Above-mentioned scope, (1+5+10) CC structure of construction of stable is practical technically, thereby avoids undesirable or unsettled structure.
The advantage that first embodiment also has is only to need two kinds of different steel wire diameter.
In second preferred embodiment of the present invention, core filament diameter D 0Less than intermediate layer diameter D 1This second preferred embodiment also can satisfy following formula:
0.69<（D 0/D 1）<0.81；
0.59<（D 0/D 2）<0.73。
Because not only diameter compares D 0/ D 1Optimization and diameter compare D 0/ D 2Optimize, always desirable technically, because can construct the rock-steady structure with good corrosion resistance like this.
Description of drawings
The present invention will be described in more detail below with reference to the accompanying drawings:
Fig. 1 a, 1b and 1c be in the prior art in construction process the varying cross-section figure of steel cord;
Fig. 2 is the cross-sectional view according to the steel cord of first embodiment of the invention;
Fig. 3 is the cross-sectional view according to the steel cord of second embodiment of the invention.
The specific embodiment
Shown in Figure 2 is the cross-sectional view of the steel cord 10 of first embodiment.This steel cord comprises that has a core filament diameter D 0Core silk 12.Has intermediate layer diameter D 1Five intermediate layer silks 14 constituted intermediate layer around core silk 12.Diameter D 1With diameter D 0Identical.Has outer diameter D 2Ten skins that outer silk 16 constitutes around the intermediate layer.All intermediate layer silks 14 and all outer silks 16 with identical sth. made by twisting to twisting with the identical lay pitch, thereby constitute the tight type structure.
Core filament diameter D 0With outer filament diameter D 2Relational expression below also satisfying:
0.76<（D 0/D 2）<0.93。
Adopt following method manufacturing according to steel cord 10 of the present invention.Raw material is the steel wire rod.The steel wire rod has following composition of steel: minimum carbon content be 0.65%(for example, at least 0.80% or at least 0.92%, maximum 1.2%); Manganese content range from 0.20% to 0.90%; Silicone content scope from 0.15% to 0.90%; Maximum sulfur is 0.03%; Maximum phosphorus content is 0.30%; In order to reduce to obtain the predetermined required deflection of tensile strength, can also add additional elements for example chromium (reaching 0.2 to 0.4%), boron, copper, cobalt, nickel, vanadium All percentages all are percentage by weights.
Steel wire rod through a plurality of in succession step and be drawn to required final diameter.The final diameter scope of steel wire is from 0.05mm to 0.60mm.When being used for strengthening the casingply of tire, the steel wire diameter preferable range is that 0.05mm is to 0.35mm.
Between these drawing steps one or more heat treatment steps can be arranged, for example sorbitizing is handled.
Steel wire preferably has the coating that promotes the rubber adhesion, or makes steel wire have corrosion proof coating.The coating that rubber can adhere to for example is brass; Anti-corrosion coating for example is zinc.
Suitable example according to the cord of first embodiment of the invention has:
0.18＋5×0.18＋10×0.215CC
0.19＋5×0.19＋10×0.23CC
0.21＋5×0.21＋10×0.25CC
Shown in Figure 3 is cross-sectional view according to the steel cord 20 of second embodiment of the invention.Steel cord 20 comprises that has a core filament diameter D 0Core silk 22.Has intermediate layer diameter D 1Five intermediate layer silks 24 twist around core silk 22.Has outer diameter D 2The skins that constitute around the intermediate layer of outer silk 26.
Core filament diameter D 0Less than intermediate layer diameter D 1, and diameter D 0, D 1, D 2Satisfy following relation:
0.69<（D 0/D 1）<0.81；
0.59<（D 0/D 2）<0.73。
Compare with Fig. 2, diameter compares D 0/ D 2Littler.Because diameter compares D 0/ D 1And D 0/ D 2Optimization, obtained rock-steady structure (1+5+10) CC, therefore avoided undesirable structure.
According to the degree of used composition of steel and final drawing, can make the steel cord of different stretch characteristic, scope from common TENSILE STRENGTH to the superelevation TENSILE STRENGTH.
Can adopt tubular type twisting machine or the device fabrications of the two sth. made by twisting of preferred employing according to steel cord of the present invention.
Two kinds of embodiment can have or not have the looping silk of looping on other.But when being used for casingply, the form of no looping silk is preferred.
Suitable example according to the cord of second embodiment of the invention has:
0.175+5 * 0.23+10 * 0.25CC the lay pitch=16mm
Sth. made by twisting is to=Z
Other example has:
0.17＋5×0.22＋10×0.24CC
0.175＋5×0.225＋10×0.245CC
0.18＋5×0.23＋10×0.255CC
Following table 1 has been summed up some performances of measuring at the steel cord of foundation second embodiment of the invention.
0.175＋5×0.23＋10×0.25CC?ST
Figure BDA00003487653700051
Figure BDA00003487653700061
This tight shaped steel cord structure can obtain high corrosion resistance, because its allows elastomer or rubber osmosis to advance between each individual wire in the skin at least of steel cord, thereby has just prevented that aqueous vapor from moving along the steel cord and along the space of steel cord inside.But, select the scope of diameter ratio by strictness, because this compact nature of steel cord has not only improved the steel cross section amount of compactness and per unit total cross section, and because having avoided constituting undesirable or unsettled structure in space suitable between the adjacent wires, therefore can obtain to have the corrosion proof structure of improvement.
Most of above-mentioned test is at the paper " research of steel cord mechanical performance and correlation test method " (" Survey of Mechanical Properties of Steel Cord and Related Test Methods ") of Bourgois Luc, " tire reinforcement and tyre performance ", ASTM STP694, R.A.Fleming and D.I.Livingston, Eds., American Society for Testing and Materials is described in detail in 1979, the 19-46 pages or leaves.

Claims (6)

1. steel cord that be used for to strengthen elastomer product, described steel cord comprises that has a core filament diameter D 0The core silk and around described core silk with identical sth. made by twisting to the 3N root layer silk that twists with the identical lay pitch, the scope of N from 4 to 5, the arrangement of described 3N root layer silk is: have intermediate layer diameter D by the N root 1Monofilament constitute the intermediate layer, the 2N root has outer diameter D 2Monofilament constitute outerly, wherein, described steel cord has following characteristics (D 0, D 1, D 2Unit: mm):
D 0≤D 1<D 2
2. steel cord according to claim 1, wherein, N equals five.
3. steel cord according to claim 2, wherein, core filament diameter D 0Equal intermediate layer diameter D 1.
4. steel cord according to claim 3, wherein, core filament diameter D 0With outer diameter D 2Satisfy following relation:
0.76<（D 0/D 2）<0.93
5. steel cord according to claim 2, wherein, core filament diameter D 0Less than intermediate layer diameter D 1
6. steel cord according to claim 5, wherein, core filament diameter D 0, intermediate layer diameter D 1With outer diameter D 2Satisfy following relation:
0.69<（D 0/D 1）<0.81；
0.59<（D 0/D 2）<0.73。
CN201180064594.7A 2011-01-10 2011-12-07 Compact steel cord Active CN103298996B8 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN2011000042 2011-01-10
CNPCT/CN2011/000042 2011-01-10
PCT/EP2011/072074 WO2012095224A1 (en) 2011-01-10 2011-12-07 Compact steel cord
CN201180064594.7A CN103298996B8 (en) 2011-01-10 2011-12-07 Compact steel cord

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104191910A (en) * 2014-07-17 2014-12-10 赛轮集团股份有限公司 All-steel radial agricultural tyre
CN107190541A (en) * 2017-06-21 2017-09-22 盛利维尔（中国）新材料技术股份有限公司 A kind of open type steel cord with 1+5+10 structures
CN111278759A (en) * 2017-10-27 2020-06-12 贝卡尔特先进帘线阿尔特公司 Belt comprising a steel cord suitable for wear detection
CN111926597A (en) * 2020-07-20 2020-11-13 江苏兴达钢帘线股份有限公司 Radial tire steel wire cord
CN112779797A (en) * 2021-01-15 2021-05-11 江苏兴达钢帘线股份有限公司 Compact steel cord
CN113123149A (en) * 2021-04-22 2021-07-16 江苏兴达钢帘线股份有限公司 Steel cord with glue permeation structure and preparation method thereof
CN113969511A (en) * 2021-11-16 2022-01-25 山东大业股份有限公司 High-permeability-rubber intensive steel cord

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56122814U (en) * 1980-02-19 1981-09-18
EP0143767A1 (en) * 1983-09-02 1985-06-05 N.V. Bekaert S.A. Steel cord for rubber articles
US4756151A (en) * 1986-09-15 1988-07-12 Compagnie Generale Des Etablissements Michelin Assembly of reinforcement cords for plastic and/or rubber materials having a core and article reinforced thereby
EP0290082A1 (en) * 1987-05-04 1988-11-09 N.V. Bekaert S.A. Compact steel cord structure
EP0627520A1 (en) * 1993-06-02 1994-12-07 N.V. Bekaert S.A. Compact steel cord with no wrapping filament
EP0675223A1 (en) * 1994-03-24 1995-10-04 N.V. Bekaert S.A. Layered steel cord construction
CN1282390A (en) * 1997-12-15 2001-01-31 贝克特股份有限公司 Steel cord with polymer material
WO2003069055A1 (en) * 2002-02-14 2003-08-21 N.V. Bekaert S.A. Compact steel cord
US6863103B1 (en) * 1999-11-11 2005-03-08 Bridgestone Corporation Steel cord for the reinforcement of a rubber article and tire

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56122814U (en) * 1980-02-19 1981-09-18
EP0143767A1 (en) * 1983-09-02 1985-06-05 N.V. Bekaert S.A. Steel cord for rubber articles
US4756151A (en) * 1986-09-15 1988-07-12 Compagnie Generale Des Etablissements Michelin Assembly of reinforcement cords for plastic and/or rubber materials having a core and article reinforced thereby
EP0290082A1 (en) * 1987-05-04 1988-11-09 N.V. Bekaert S.A. Compact steel cord structure
EP0627520A1 (en) * 1993-06-02 1994-12-07 N.V. Bekaert S.A. Compact steel cord with no wrapping filament
EP0675223A1 (en) * 1994-03-24 1995-10-04 N.V. Bekaert S.A. Layered steel cord construction
CN1282390A (en) * 1997-12-15 2001-01-31 贝克特股份有限公司 Steel cord with polymer material
US6863103B1 (en) * 1999-11-11 2005-03-08 Bridgestone Corporation Steel cord for the reinforcement of a rubber article and tire
WO2003069055A1 (en) * 2002-02-14 2003-08-21 N.V. Bekaert S.A. Compact steel cord

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104191910A (en) * 2014-07-17 2014-12-10 赛轮集团股份有限公司 All-steel radial agricultural tyre
CN107190541A (en) * 2017-06-21 2017-09-22 盛利维尔（中国）新材料技术股份有限公司 A kind of open type steel cord with 1+5+10 structures
CN111278759A (en) * 2017-10-27 2020-06-12 贝卡尔特先进帘线阿尔特公司 Belt comprising a steel cord suitable for wear detection
CN111278759B (en) * 2017-10-27 2022-05-10 贝卡尔特先进帘线阿尔特公司 Belt comprising a steel cord suitable for wear detection
CN111926597A (en) * 2020-07-20 2020-11-13 江苏兴达钢帘线股份有限公司 Radial tire steel wire cord
CN112779797A (en) * 2021-01-15 2021-05-11 江苏兴达钢帘线股份有限公司 Compact steel cord
WO2022151623A1 (en) * 2021-01-15 2022-07-21 江苏兴达钢帘线股份有限公司 Compact steel cord
CN113123149A (en) * 2021-04-22 2021-07-16 江苏兴达钢帘线股份有限公司 Steel cord with glue permeation structure and preparation method thereof
CN113969511A (en) * 2021-11-16 2022-01-25 山东大业股份有限公司 High-permeability-rubber intensive steel cord

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Correction item: National priority

Correct: PCT/CN2011/000042 2011.01.10 CN

Number: 01

Page: The title page

Volume: 32

Correction item: National priority

Correct: PCT/CN2011/000042 2011.01.10 CN

Number: 01

Volume: 32