CN108725617A - Rubber belt track - Google Patents
Rubber belt track Download PDFInfo
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- CN108725617A CN108725617A CN201810293159.5A CN201810293159A CN108725617A CN 108725617 A CN108725617 A CN 108725617A CN 201810293159 A CN201810293159 A CN 201810293159A CN 108725617 A CN108725617 A CN 108725617A
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- Prior art keywords
- rubber
- pattern block
- belt track
- rubber composition
- rubber belt
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/18—Tracks
- B62D55/24—Tracks of continuously flexible type, e.g. rubber belts
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- Mechanical Engineering (AREA)
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Abstract
The subject of the invention is to provide the rubber belt tracks that a kind of anti-wound performance (anti-cut performance) of decorative pattern root tuber is excellent.The solution of the present invention is to provide a kind of rubber belt track, it is the rubber belt track at least one pattern block, wherein, the central portion of length direction in the plan view of above-mentioned pattern block is on the section of the length direction, the root of above-mentioned pattern block has at least one recess portion for bending to the arc-shaped that radius of curvature is 15~45mm, and the top surface width of above-mentioned pattern block is 18mm or more；The rubber composition for constituting above-mentioned pattern block is the vulcanized rubber composition that elongation at break is 670% or more and the tan δ at 70 DEG C are 0.22 or more.
Description
Technical field
The present invention relates to a kind of rubber belt tracks of the mobile devices mounted on Work machines such as combine harvesters.
Background technology
Caterpillar often travels on the ground of out-of-flatness, at this point, elastomeric track formed of rubber by
The fierce ground of bumps in traveling, and cause to be deformed in pattern block (lug), collapse, and pattern block is grabbed attachedly
The ability (tractive force) in face reduces.In addition, if repeatedly the deformation of pattern block, collapse, lead to pattern block or track body
Cracking etc..
In this regard, for example, patent document 1, which discloses a kind of inside in pattern block, is embedded to hardness rubber more higher than other parts
The technology of colloid core.But, it is desirable that anti-wound performance (anti-cut performance) etc. further improves.
【Existing technical literature】
【Patent document】
【Patent document 1】Japanese Patent Laid-Open 9-249163 bulletins
Invention content
【The subject that the invention solves】
Present invention aim to address the above problems, and it is excellent to provide a kind of anti-wound performance (anti-cut performance) of decorative pattern root tuber
Different rubber belt track.
【The means to solve the problem】
It is the rubber belt track at least one pattern block the present invention relates to a kind of rubber belt track, which is characterized in that
The central portion of length direction in the plan view of above-mentioned pattern block is on the section of the length direction, in above-mentioned pattern block
Root there is at least one to bend to the recess portion for the arc-shaped that radius of curvature is 15~45mm, and the top surface of above-mentioned pattern block is wide
Degree is 18mm or more；The rubber composition for constituting above-mentioned pattern block is that elongation at break is 670% or more and at 70 DEG C
The vulcanized rubber composition that tan δ are 0.22 or more.
It is preferred that in above-mentioned rubber composition, the molecular weight distribution (Mw/Mn) in 100 mass % of rubber constituent is 1.7 or more
SBR styrene butadiene rubbers content be 50 mass % or more.
It is preferred that above-mentioned rubber composition includes isoprene-styrene resin or dicyclopentadiene novolacs.
【The effect of invention】
In accordance with the invention it is possible to provide a kind of rubber that the anti-wound performance (anti-cut performance) of decorative pattern root tuber is excellent shoe
Band, this is because the rubber belt track is the rubber belt track for having at least one pattern block, which is characterized in that in above-mentioned pattern block
The central portion of length direction in plan view has at least on the section of the length direction in the root of above-mentioned pattern block
1 recess portion for bending to the arc-shaped that radius of curvature is 15~45mm, and the top surface width of above-mentioned pattern block is 18mm or more；
The rubber composition for constituting above-mentioned pattern block is that elongation at break is 670% or more and the tan δ at 70 DEG C are 0.22 or more
Vulcanized rubber composition.
Description of the drawings
Fig. 1 is an example of the partial plan layout of rubber belt track.
Fig. 2 is an example of the vertical cross-section diagram of the central portion of the length direction of pattern block of the first embodiment
(the A-A arrow timberlines partial cross-sectional view of Fig. 1).
Fig. 3 is an example of the vertical cross-section diagram of the central portion of the length direction of pattern block of the second embodiment
(the A-A arrow timberlines partial cross-sectional view of Fig. 1).
Symbol description
1 rubber belt track
2 track bodies
The peripheral surface of 2a track bodies
The hole of 3 sprocket engagements
6,7,8 (6a, 6b, 7a, 8a) pattern block
The top surface of 9 pattern blocks
The width of the circumferencial direction of the top surface of a pattern blocks
The length of the circumferencial direction of the root of b pattern blocks
11 facades
12 (base portions)
12R, 12R1,12R2 recess portion
X width directions
Y circumferencial directions
Specific implementation mode
The rubber belt track of the present invention has at least one pattern block.Moreover, the length in the plan view of above-mentioned pattern block
The central portion in direction on the section of the length direction, in the root of above-mentioned pattern block there is at least one to bend to curvature half
Diameter is the recess portion of the arc-shaped of 15~45mm, and the top surface width of above-mentioned pattern block is 18mm or more.In addition, constituting above-mentioned flower
The rubber composition of line block is the vulcanized rubber group that elongation at break is 670% or more and the tan δ at 70 DEG C are 0.22 or more
Close object.
The decorative pattern root tuber of above-mentioned rubber belt track has excellent anti-wound performance (anti-cut performance).For this can be obtained
The principle of the function and effect of sample is also indefinite, but can be presumed as follows.
Rubber belt track generates cutting due to stone etc..Especially in traction, pattern block collapses, and is generated in decorative pattern root tuber
Large strain, at this point, being further deformed due to consumingly being contacted with stone, fracture of the strain more than material of generation is stretched
Become incised injury when long rate.Therefore, the root of pattern block is for the unfavorable position of incised injury.Moreover, this incised injury is due to anti-
Multiple deformation and grow, when reaching the steel cord of crawler belt, cord is made to deteriorate (getting rusty) due to the intrusion of water and air, from
And lead to the cut-out of cord, and then finally damage crawler belt.
On the other hand, in the present invention, it is 15 by the way that at least one is arranged to bend to radius of curvature (R) in the root of pattern block
The recess portion of the arc-shaped of~45mm, while making the top surface width of pattern block in 18mm or more, to which pattern block becomes to be not easy to collapse,
Deformation reduces.In the present invention, further, by the vulcanized rubber composition (rubber composition after vulcanization) for making composition pattern block
Elongation at break (EB) 670% or more so that rubber becomes difficult to be broken, while by making the tan δ at 70 DEG C
It is 0.22 or more, is heat to make the energy conversion of input rubber, deformation is made to mitigate.It can thus be assumed that in the present invention, in addition to logical
It crosses except the shape of adjustment pattern block, it is also contemplated that EB and energy when driving carry out matching design, exceed to show
The effect of the incised injury of the significant inhibition decorative pattern root tuber of anticipation.
In addition, it is believed that in above-mentioned rubber belt track, by using the molecular weight distribution of specified amount wide in pattern block
SBR, the energy (strain) due to low molecular weight compositions relative to input neatly moves accordingly, thus stress is made to be difficult to concentrate,
It is difficult to produce fracture, simultaneously because high molecular weight components show high rubbery intensity, thus it is shown that collaboration inhibits pattern block
The effect of the incised injury of root.
In addition, it is believed that in above-mentioned rubber belt track, by the intermiscibility for further containing the SBR wide with molecular weight distribution
High isoprene-styrene resin or dicyclopentadiene novolacs, accordingly by from external input strain energy of distortion when due to resin
It is present between rubber molecule, to which stress reception and registration becomes difficult between rubber molecule, energy is converted into fever rather than is turned
The deformation of rubber molecule is turned to, therefore the generation of rubber fracture becomes more difficult, shows collaboration and inhibit decorative pattern root tuber
The effect of incised injury.
Hereinafter, being illustrated to an example of the rubber belt track of the present invention with reference to attached drawing.
Fig. 1 is the partial plan layout (top partial view diagram) for the part for showing rubber belt track.Fig. 2 is the length side of pattern block
Into the central portion of (length direction in plan view), perpendicular to sectional view (the A-A arrows of Fig. 1 of length direction cut-out
Timberline partial cross-sectional view).
In the 1st embodiment of Fig. 1 and Fig. 2, rubber belt track 1 is mounted on the row of the agricultural machinery such as combine harvester
It sails and is used on device.The mobile devices are such as rotatable sprocket wheel, carrying roller, multiple idler wheels are arranged on track-frame
Made of device, rubber belt track 1 is wound onto on the mobile devices and by chain wheel drive.
As shown in Figure 1, rubber belt track 1 has band-like track body 2 for no reason made of rubber.Hereinafter, by crawler belt master
The strip length direction of body 2 is known as " circumferencial direction " (being indicated with symbol Y in figure), by the bandwidth direction orthogonal with circumferencial direction
Referred to as " width direction " (sign X is used in figure).
In the inside of track body 2, it is embedded with by the stretch-proof body of the endless shape of the formation such as steel cord, also, in order to mend
It is golden (core metal) (not shown) to be embedded with multiple cores at intervals on the circumferencial direction Y of track body 2 by force.In crawler belt
Main body 2 is provided with the hole 3 (hereinafter referred to as engaging hole 3) of multiple sprocket engagements.Thickness direction of the engaging hole 3 in track body 2
On be formed through, and on the circumferencial direction Y of track body 2 at certain intervals formed so that the tooth of sprocket wheel is sequentially embedded.
Engaging hole 3 is quadrangularly formed on circumferencial direction Y in length.
In the peripheral surface 2a of track body 2, multiple pattern block 6a, 6b, 7a, 8a are protrudedly formed outward.Each pattern block
(6a, 6b, 7a, 8a) is formed at certain intervals on the circumferencial direction Y of track body 2.As shown in Figure 1, each pattern block
Region on circumferencial direction Y between adjacent engaging hole 3 is formed along width direction X.
As shown in Figure 1, in track body 2 of the first embodiment, alternately it is formed on circumferencial direction Y：Decorative pattern
The long decorative pattern block portion 6 of the length length of the width direction X of block, the in contrast short short decorative pattern block portion 7 of the length of width direction X and same
Sample width direction X the short short decorative pattern block portion 8 of length.In long decorative pattern block portion 6, it is formed with 2 pattern blocks 6a, 6b；In short flower
Line block portion 7,8 is formed with 1 pattern block 7a, 8a.It is formed with the long decorative pattern block portion 6 of 2 pattern blocks 6a, 6b, except in circumferencial direction
It is formed with spreading all over the almost all width of the width direction X of rubber belt track 1 other than part between the upper adjacent engaging holes 3 of Y
Pattern block part.
At the top of each pattern block (6a, 6b, 7a, 8a), it is formed with flat planar and rectangular top surface 9.From anti-wound
From the viewpoint of performance (anti-cut performance) is excellent, the circumferencial direction Y's of the top surface 9 of each pattern block in the section view of Fig. 2
Width a (the width a of the central portion of the length direction in plan view：In the example of Fig. 1, the circumference side of the top surface 9 of each pattern block
It is 18mm or more, preferably 20mm or more, more preferably 22mm or more to the length a) of Y.Its upper limit is not particularly limited, but excellent
30mm is selected as hereinafter, more preferably 26mm or less.
Each pattern block (6a, 6b, 7a, 8a) is as shown in Fig. 2, in lateral plan (section view), the trapezoidal shape of pattern block
Formed to shape.Each pattern block is formed with the peripheral surface 2a relative to track body 2 on the side and the other side of circumferencial direction Y
With 0 inclined facade 11 (opposite 11 in the side of circumferencial direction Y and the other side) of predetermined angular (below by facade 11 with
The angle constituted along the discribed straight line M of the peripheral surface 2a of track body 2 is known as tilt angle theta).Although in this example, respectively
The facade of the tilt angle theta of the facade 11 of the side of the circumferencial direction Y of pattern block and the other side of the circumferencial direction Y of the pattern block
11 angle of inclination (θ) is identical but it is also possible to be different angles of inclination.
From the viewpoint of anti-wound performance (anti-cut performance) is excellent, above-mentioned angle of inclination (θ) is preferably 16~19 degree,
More preferably 17~19 degree, further preferably 18~19 degree.
As shown in the sectional view of Fig. 2, each pattern block (6a, 6b, 7a, 8a) is in lateral plan (section view), in each flower
It is formed on the side and the other side of the circumferencial direction Y of line block with recess portion 12R (the one of circumferencial direction Y for bending to arc-shaped
A pair of of recess portion 12R of side and the other side) root 12 (base portion 12).
Recess portion 12R has the curve form for bending to the arc-shaped that radius of curvature (R) is 15~45mm.From anti-wound performance
From the viewpoint of (anti-cut performance) is excellent, which is preferably 15~40mm, more preferably 15~35mm, further excellent
It is selected as 20~30mm.
About each pattern block (6a, 6b, 7a, 8a), by root 12, the facade 11 on the circumferencial direction Y of pattern block accordingly
It is connect in sequential like with the peripheral surface 2a of track body 2.That is, in each pattern block, facade 11 refers to pattern block front end side (decorative pattern
Block top surface side) with angle of inclination (θ) inclined planar portions.Root 12 refers to by facade 11 and the peripheral surface 2a of track body 2 in company
The position connected to continuous shape refers to the recess portion that there is at least one to bend to the arc-shaped with regulation radius of curvature in of the invention
Position (base portion).
About each pattern block, the height (block height) from the peripheral surface 2a of track body 2 to its top surface 9 is roughly equal
Ground is formed, but can also have different block heights.The block height is preferably 20 (in Fig. 2, H11+H12)~
40mm, more preferable 30~40mm.
As shown in Fig. 2, the ratio between the height H11 of the facade 11 of each pattern block and the height H12 of root 12 (H11/H12) are preferably
0.10~2.00, more preferably 0.20~1.80.
From the viewpoint of anti-wound performance (anti-cut performance) is excellent, the length of the circumferencial direction Y of the root 12 of each pattern block
It is preferably 35~55mm to spend b, more preferably 35~50mm, further preferably 35~45mm.In addition, as shown in Fig. 2, the length
B is the facade 11 along each pattern block to the peripheral surface 2a of track body 2 and the straight line (being indicated with two dot dot dash M) described and edge
The peripheral surface 2a of track body 2 and the intersection point P of straight line (being indicated with two dot dot dash M) that describes are each other in a circumferential direction
Distance.
In the 2nd embodiment of Fig. 3, in a same manner as in the first embodiment, it is formed with engaging hole 3 in track body 2, in circumference
Long decorative pattern block portion 6 and short decorative pattern block portion 7,8 are alternately formed on the Y of direction.In 2nd embodiment, such as the sectional view institute of Fig. 3
Show, the shape of each pattern block (6a, 6b, 7a, 8a) is different from the 1st embodiment.
As shown in figure 3, each pattern block is formed on the side and the other side of circumferencial direction Y relative to track body 2
Peripheral surface 2a is with the inclined facades 11 (side of circumferencial direction Y and an opposite 11 of the other side) of predetermined angular θ.The 2nd of Fig. 3
In embodiment, tilt angle theta is expressed as from the identical example of the 1st embodiment of Fig. 2 but it is also possible to be different examples.
The preferred scope of tilt angle theta is identical as above-mentioned record.
As shown in fig. 3 in cross section, each pattern block (6a, 6b, 7a, 8a) is in side view (sectional view), in each pattern block
Circumferencial direction Y side and the other side on be formed with bending to (the circumference side recess portion 12R1 and recess portion 12R2 of arc-shaped
To a pair of of the recess portion 12R1 and a pair of recess portion 12R2 of the side of Y and the other side) root 12 (base portion 12).Recess portion 12R1, recess portion
12R2 is respectively provided with the curved surface for bending to the arc-shaped that mutually different radius of curvature R is 15~45mm.The embodiment of Fig. 2 is
The form that the radius of curvature of recess portion 12R1 is 20mm, the radius of curvature of recess portion 12R2 is 30mm, and there is recess portion 12R1 and recess portion
The shape that 12R2 is connected in sequential like.The preferred scope of the radius of curvature is identical as above-mentioned record.
The rubber composition for constituting above-mentioned pattern block is that the vulcanized rubber that elongation at break (EB) is 670% or more combines
Object.That is, vulcanized rubber composition (rubber composition after vulcanization) shape that above-mentioned pattern block is 670% or more by elongation at break
At.The elongation at break (25 DEG C) is preferably 675% or more.By making the elongation at break more than lower limit, having can obtain
To the tendency of good anti-wound performance (anti-cut performance).Its upper limit is not particularly limited, but from abrasion when appearance sight
Point considers that preferably 900% hereinafter, more preferably 850% or less.
The rubber composition for constituting above-mentioned pattern block is vulcanized rubber compositions of the tan δ at 70 DEG C 0.22 or more.
That is, vulcanized rubber composition (rubber composition after vulcanization) shape that above-mentioned pattern block is 0.22 or more by the tan δ at 70 DEG C
At.The tan δ (70 DEG C) are preferably 0.24 or more, and more preferably 0.26 or more.By make the tan δ at 70 DEG C lower limit with
On, the energy of input is converted into heat when being contacted accordingly with stone, there is the tendency for becoming difficult to generate cutting.Its upper limit does not have
It is particularly limited to, but from the viewpoint of heat resistance, preferably 0.30 hereinafter, more preferably 0.28 or less.
Preferably, the stress (M100) when the rubber composition for constituting above-mentioned pattern block is 100% stretching is 1.5 or more
Vulcanized rubber composition.That is, vulcanized rubber composition (the rubber group after vulcanization that above-mentioned pattern block is preferably 1.5 or more by M100
Close object) it is formed.The M100 is preferably 1.7 or more, and more preferably 2.0 or more.By making the M100 more than lower limit, have accordingly
It can obtain the tendency of good anti-wound performance (anti-cut performance).Its upper limit is not particularly limited, but from the viewpoint of traction
Consider, more preferably 4.0 hereinafter, further preferably 3.5 or less.
In addition, in the present specification, EB (25 DEG C), tan δ (70 DEG C) and M100 are surveyed by the method described in embodiment
The value measured.
Next, being said with rubber composition ((unvulcanized) rubber composition for constituting pattern block) for pattern block
It is bright.
In pattern block rubber composition, as rubber constituent, isoprene rubber, butadiene rubber can be enumerated
(BR), styrene butadiene ribber (SBR), styrene isoprene butadiene rubber (SIBR), ethylene propylene diene rubber
(EPDM), neoprene (CR), acrylonitrile butadiene rubber (NBR), butyl system rubber etc..Wherein, good from that can obtain
From the viewpoint of anti-wound performance (anti-cut performance), preferably SBR, isoprene rubber.
It is not particularly limited as SBR, emulsion polymerization styrene butadiene ribber (E-SBR), solution can be used for example
Polymerizing styrene butadiene rubber (S-SBR) etc..Can be any one of unmodified SBR, modified SBR.By improving SBR ratios
Example, hereby it is possible to improve tan δ.Wherein, it is examined from the viewpoint for the effect that can synergistically obtain the incised injury for inhibiting decorative pattern root tuber
Consider, preferred molecular weight is distributed the SBR that (Mw/Mn) is 1.7 or more.
The molecular weight distribution (Mw/Mn) of SBR is preferably 1.7 or more, more preferably 2.0 or more, further preferably 2.3 with
On.By making the molecular weight distribution be 1.7 or more, good anti-wound performance (anti-cut performance) can be obtained accordingly by having
Tendency.The upper limit of Mw/Mn is not particularly limited, but preferably 2.7 hereinafter, more preferable 2.5 or less.In addition, weight average molecular weight
(Mw) and number-average molecular weight (Mn) can will use gel permeation chromatography (the GPC) (GPC- manufactured by TOSOH Co., Ltd
8000 series, detector：Differential refractometer, pillar：The TSKGEL SUPERMALTPORE HZ- manufactured by TOSOH Co., Ltd
M it based on the test value) obtained, is acquired by standard polystyren conversion.
In pattern block rubber composition, the content for the SBR that the Mw/Mn in 100 mass % of rubber constituent is 1.7 or more is excellent
It is selected as 50 mass % or more, more preferably 55 mass % or more.When the content is more than 50 mass %, having can obtain well
Anti- wound performance (anti-cut performance) the case where.The upper limit of above-mentioned content is not particularly limited, but preferably 90 mass % with
Under, more preferably 80 mass % or less.
As SBR, it is, for example, possible to use by Sumitomo Chemical Co manufacture polymerisation in solution SBR, by Asahi Chemical Industry strain formula
The polymerisation in solution SBR of commercial firm's manufacture, the polymerisation in solution SBR manufactured by Zeon Corp.
As isoprene rubber, synthesis isoprene rubber (IR), natural rubber (NR), modified natural rubber can be enumerated
Glue etc..Also include deproteinized natural rubber (DPNR), high-purity natural rubber (HPNR) in NR；It, can as modified natural rubber
Enumerate epoxy natural rubber (ENR), HNR hydrogenated natural rubber (HNR), grafting natural rubber etc..In addition, as NR, can make
With common product, such as SIR20, RSS#3, TSR20 etc. in tire industry.Wherein, preferably NR, IR, more preferable NR.
In pattern block rubber composition, the content of the isoprene rubber in 100 mass % of rubber constituent is preferably 5
Quality % or more, more preferably 20 mass % or more, further preferably 30 mass % or more.The upper limit of the content is preferably 80
Quality % hereinafter, more preferably 60 mass % hereinafter, further preferably 50 mass % or less.
Pattern block preferably comprises carbon black with rubber composition.Thus, it is possible to obtain anti-wound performance (anti-cut performance).
As the carbon black that can be used, can enumerate N134, N110, N220, N234, N219, N339, N330, N326,
N351, N550, N762 etc..These carbon blacks may be used alone, used in two or more.
N2 adsorption specific surface area (the N of carbon black2SA) it is preferably 50m2/ g or more, more preferably 80m2/ g or more, it is further excellent
It is selected as 90m2/ g or more.By making N2For SA more than lower limit, good anti-wound performance (anti-cut can be obtained accordingly by having
Can) tendency.In addition, above-mentioned N2SA is preferably 200m2/ g is hereinafter, more preferably 150m2/ g is hereinafter, further preferably
125m2/ g or less.By making N2SA is in the upper limit hereinafter, having the tendency for the good dispersion that can obtain carbon black accordingly.
In addition, the N2 adsorption specific surface area of carbon black can be according to JIS K 6217-2：2001 acquire.
As carbon black, can be used for example Asahi Caton Co., Ltd., Cabot Amada Co., Ltd., Tokai Carbon Co., Ltd.,
Mitsubishi chemical Co., Ltd, Lion Corporation, Shinnitsuka Carbon KK, Colombia's carbon (Colombian carbon) are public
The product of department etc..
In pattern block rubber composition, by rubber constituent in terms of 100 mass parts, the content of carbon black is preferably 20 mass parts
More than, more than more preferably 40 mass parts, more than further preferably 50 mass parts.By make the content of carbon black lower limit with
On, there is the tendency that can obtain good anti-wound performance (anti-cut performance) accordingly.In addition, above-mentioned content is preferably 100
Below mass part, more preferably 70 is below mass part, and further preferably 65 is below mass part.By making the content of carbon black upper
Limit hereinafter, have the tendency for the good dispersion that can obtain carbon black accordingly.
Preferably, pattern block rubber composition contains isoprene-styrene resin or dicyclopentadiene novolacs.Isoamyl
Styrene resin is the resin at least containing isoprene and styrene as composition monomer, such as can enumerate C5C9 and be total to
Poly resin etc..Dicyclopentadiene novolacs are at least to contain bicyclopentadiene as the resin for constituting monomer, for example, can enumerate two
Cyclopentadiene fraction has carried out bicyclopentadiene through-stone oleoresin etc. obtained from thermal polymerization.These resins can be used alone
It can be used in combination with two or more.
As isoprene-styrene resin, dicyclopentadiene novolacs, can use by the production of the manufactures such as Tosoh company
Product.
In pattern block rubber composition, by rubber constituent be 100 mass parts in terms of, isoprene-styrene resin
Content is preferably 5 mass parts or more, more than more preferably 10 mass parts.By making the content more than lower limit, there is EB accordingly
Increased tendency.In addition, the upper limit of above-mentioned content is not particularly limited, but preferably 30 is below mass part, more preferably 20 matter
Measure part or less.
In pattern block rubber composition, by rubber constituent in terms of 100 mass parts, the content of dicyclopentadiene novolacs is excellent
5 mass parts or more are selected as, more than more preferable 9 mass parts, more than 10 mass parts, more than particularly preferred 11 mass parts.
By making the content more than lower limit, there is the increased tendencies of EB accordingly.In addition, the upper limit of above-mentioned content is not particularly limited,
But preferably 30 is below mass part, and more preferably 20 is below mass part.
In pattern block rubber composition, by rubber constituent be 100 mass parts in terms of, isoprene-styrene resin and
Total content of dicyclopentadiene novolacs is preferably 5 mass parts or more, more than more preferable 10 mass parts.By making its total content
More than lower limit, there is the increased tendencies of EB accordingly.In addition, the upper limit of above-mentioned content is not particularly limited, but preferably 30 matter
Part is measured hereinafter, more preferably 20 is below mass part.
Pattern block rubber composition can contain oil.
Or mixtures thereof as oil, such as operation oil, vegetable fat can be enumerated.As operation oil, stone can be used for example
Wax system operation oil, aromatic series operation oil, naphthene series operation oil etc..As vegetable fat, castor oil, cottonseed oil, flax can be enumerated
Seed oil, rapeseed oil, soybean oil, palm oil, coconut oil, peanut oil, rosin, pine tar, pine tar, tall oil, corn oil, rice bran
Oil, safflower oil, sesame oil, olive oil, sunflower oil, palm-kernel oil, camellia oil, SIMMONDSIA CHINENSIS SEED OIL, macadimia nut oil, tung oil etc..
Wherein, preferred operations oil.
As oil, such as Idemitsu Kosen Co., Ltd., Sankyo Yuka Kogya K.K., Japan Energy strain formula meeting can be enumerated
Society, Ao Lisuo (Olisoy) company, H&R companies, Feng Guo liquefactions Co., Ltd., Showa Shell Sekiyu, the emerging production of Fuji
The product of Co., Ltd. etc..
By rubber constituent be 100 mass parts in terms of, oily content is preferably 15 below mass part, more preferably 10 mass parts with
Under, further preferably 7 is below mass part.By making the content of oil in the upper limit hereinafter, having the increased tendencies of EB accordingly.This
Outside, the lower limit of above-mentioned content is not particularly limited, but more than preferably 0.5 mass parts, more than more preferably 1.0 mass parts.
In pattern block rubber composition other than mentioned component, it can also add in rubber industry and commonly add
Agent can enumerate the vulcanizing agents such as sulphur, vulcanization accelerator, silica, calcium carbonate, talcum, aluminium oxide, clay, aluminium hydroxide, mica
Equal fillers, wax, antioxidant, stearic acid, zinc oxide etc..
For example, by using silica (for example, by rubber constituent be 100 mass parts in terms of, be 7~10 mass parts journeys
Degree), hereby it is possible to improve EB.By filling filler to which fracture strength (TB) improves, another aspect EB declines, but due to two
Silica is not strong with being bonded for polymer compared with carbon black, therefore the decline of EB is small.Therefore, by the way that a part of carbon black to be replaced into
Silica becomes advantageous hereby it is possible to ensure EB while keeping hardness for anti-cut performance.
Constitute pattern block vulcanized rubber composition (rubber composition after vulcanization) can by using open roller,
The compounding rubbers devices such as banbury mixers (Bunbury mixer) are by the pattern block rubber composition containing above-mentioned each ingredient
It is kneaded, the method etc. then vulcanized is prepared.In addition, rubber belt track can be by using pattern block rubber group
Object is closed to manufacture to obtain using usual way.
【Embodiment】
Hereinafter, the various chemicals used in embodiment and comparative example are carried out to summarize explanation.
NR：TSR20
SBR1：Styrene butadiene ribber 1 (Mn/Mw=1.8)
SBR2：Styrene butadiene ribber 2 (Mn/Mw=1.4)
Carbon black 1：N2SA 111m2/g
Carbon black 2：N2SA 75m2/g
C5C9 copolymer resins：Isoprene styrene the copolymer resins (" Petrotack of TOSOH Co., Ltd's manufacture
70”)
Dicyclopentadiene novolacs (DCPD resins)：" Quintone 1325 " of Zeon Corp's manufacture
Anti-aging agent 6C：N- phenyl-N '-(1,3- dimethylbutyl)-p-phenylenediamine
Anti-aging agent RD：2,2,4- trimethyl -1,2- dihydroquinoline polymer
Oil：Operation oil
Sulphur：Powdery sulphur
Vulcanization accelerator NS：N- tertiary butyls -2-[4-morpholinodithio sulfenamide
<Embodiment and comparative example>
Use the pattern block rubber composition of formula content, the endless shape made of steel cord shown in Tables 1 and 2
Stretch-proof body, multiple core gold etc., manufacture the rubber belt track of the form of Fig. 1, Fig. 3.
In addition, pattern block rubber composition is had sulphur by vulcanizing 35 minutes conditions of vulcanizations, manufacture at 150 DEG C
(decorative pattern is block-shaped for the pattern block of change rubber composition (rubber composition after vulcanization)：It is recorded in table 1, table 2).
(elongation at break (25 DEG C))
Using by being formed by vulcanizing at 150 DEG C the vulcanized rubber composition that 35 minutes above-mentioned conditions of vulcanizations manufacture
No. 3 dumbbell shape test films, according to JIS K 6251 " assay method of vulcanized rubber and thermoplastic elastomer-tensile properties ", 25
Implement tension test at DEG C, measures elongation at break EB (%).
(tanδ(70℃))
Using viscoplasticity spectrometer VES (manufactured by this making of Co., Ltd.'s rock), in temperature 70 C, frequency 10Hz, initial
Under conditions of strain 10% and dynamic strain 2%, the above-mentioned conditions of vulcanization system by carrying out vulcanization in 35 minutes at 150 DEG C is measured
The loss angle tangent (tan δ) of standby obtained vulcanized rubber composition.
(stress (M100) when 100% stretching)
Use the vulcanized rubber composition shape by the above-mentioned conditions of vulcanization manufacture by carrying out vulcanization in 35 minutes at 150 DEG C
At No. 3 dumbbell shape test films, according to JIS K6251 " assay method of vulcanized rubber and thermoplastic elastomer-tensile properties ",
Implement tension test at 25 DEG C, measures M100 (MPa).
(durability (anti-cut) relative to wound)
By the vulcanized rubber composition made by carrying out the above-mentioned conditions of vulcanization of vulcanization in 35 minutes at 150 DEG C, it is made
The rubber sample of wide 10cm, long 30cm, thickness 1cm.Grit is paved on manufactured rubber sample, and make the load of heavy burden 10kg
Roller was continuously driven 12 hours with 5cm/ seconds speed.Measure the size of the damage of rubber sample generation.By the rubber of embodiment 1
The damage of sample is set as 100, by the durability of each formula with exponential representation.The bigger expression damage of the index is smaller, and durability is (anti-
Cutting) it is more excellent.If the index is 90 or more, there is no problem on practicability.
【Table 1】
【Table 2】
According to table 1 it is found that compared to the comparative example without defined EB, tan δ, the comparative example without regulation shape
Rubber belt track, the width for having the recess portion for having regulation radius of curvature in root and top surface is the pattern block of 18mm or more, into
The rubber belt track of embodiment of one step also with defined EB, tan δ, the anti-cut of the root of pattern block are excellent.
According to table 2 it is found that in pattern block formula, pass through use, the SBR and the isoamyl of the Mw/Mn SBR for being 1.7 or more
Being used in combination for styrene resin or dicyclopentadiene novolacs, can synergistically improve anti-cut.
Claims (10)
1. a kind of rubber belt track is the rubber belt track for having at least one pattern block, which is characterized in that
The central portion of length direction in the plan view of the pattern block is on the section of the length direction, described
The root of pattern block has at least one recess portion for bending to the arc-shaped that radius of curvature is 15~45mm, and the pattern block
Top surface width is 18mm or more；
The rubber composition for constituting the pattern block be elongation at break be 670% or more and the tan δ at 70 DEG C be 0.22 with
On vulcanized rubber composition.
2. rubber belt track according to claim 1, which is characterized in that in the rubber composition, 100 matter of rubber constituent
The content for measuring the SBR styrene butadiene rubbers that the molecular weight distribution mw/mn in % is 1.7 or more is 50 mass % or more.
3. rubber belt track according to claim 1 or 2, which is characterized in that the rubber composition includes isoprene-benzene
Vinyl or dicyclopentadiene novolacs.
4. rubber belt track according to claim 1 or 2, which is characterized in that the top surface width of the pattern block be 20mm with
On.
5. rubber belt track according to claim 2, which is characterized in that the content of the SBR styrene butadiene rubbers is 55
Quality % or more.
6. rubber belt track according to claim 2, which is characterized in that the content of the SBR styrene butadiene rubbers is 60
Quality % or more.
7. rubber belt track according to claim 3, which is characterized in that in the rubber composition, with rubber constituent for 100
The content of mass parts meter, the isoprene-styrene resin is 5~30 mass parts.
8. rubber belt track according to claim 3, which is characterized in that in the rubber composition, with rubber constituent for 100
The content of mass parts meter, the isoprene-styrene resin is 10~30 mass parts.
9. rubber belt track according to claim 3, which is characterized in that in the rubber composition, with rubber constituent for 100
The content of mass parts meter, the dicyclopentadiene novolacs is 5~30 mass parts.
10. rubber belt track according to claim 3, which is characterized in that in the rubber composition, be with rubber constituent
The content of 100 mass parts meters, the dicyclopentadiene novolacs is 10~30 mass parts.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-079801 | 2017-04-13 | ||
| JP2017079801A JP6866739B2 (en) | 2017-04-13 | 2017-04-13 | Rubber crawler |
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| Publication Number | Publication Date |
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| CN108725617A true CN108725617A (en) | 2018-11-02 |
| CN108725617B CN108725617B (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810293159.5A Active CN108725617B (en) | 2017-04-13 | 2018-04-03 | Rubber track |
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| CN (1) | CN108725617B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114746330A (en) * | 2019-11-25 | 2022-07-12 | 米其林集团总公司 | Tread for vehicle track |
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| CN114746330B (en) * | 2019-11-25 | 2023-11-03 | 米其林集团总公司 | Tread for a track of a vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108725617B (en) | 2022-06-14 |
| JP6866739B2 (en) | 2021-04-28 |
| JP2018177009A (en) | 2018-11-15 |
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