WO2007102310A1 - 伝動ベルト - Google Patents
伝動ベルト Download PDFInfo
- Publication number
- WO2007102310A1 WO2007102310A1 PCT/JP2007/053132 JP2007053132W WO2007102310A1 WO 2007102310 A1 WO2007102310 A1 WO 2007102310A1 JP 2007053132 W JP2007053132 W JP 2007053132W WO 2007102310 A1 WO2007102310 A1 WO 2007102310A1
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- WO
- WIPO (PCT)
- Prior art keywords
- rubber layer
- belt
- rubber
- core wire
- less
- Prior art date
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Classifications
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- 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
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G5/00—V-belts, i.e. belts of tapered cross-section
- F16G5/20—V-belts, i.e. belts of tapered cross-section with a contact surface of special shape, e.g. toothed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D29/00—Producing belts or bands
- B29D29/10—Driving belts having wedge-shaped cross-section
- B29D29/103—Multi-ribbed driving belts
Definitions
- a rubber layer in which an ethylene oi elastomer elastomer is used as a base rubber is formed in the longitudinal direction of the belt, and the core is bonded to the rubber layer so that a cord is formed in the longitudinal direction of the belt. It relates to a transmission belt that is buried, and in particular, to a transmission belt that requires a high load transmission capability.
- transmission belts have been widely used as means for transmitting power from the drive side to the driven side.
- high load transmission has been used for toothed belts, V belts, V ribbed belts for automobiles and general industries.
- Ability is required.
- a transmission belt a belt in which a tensile body called a beveled core that applies a tensile force in the transmission direction (belt longitudinal direction) is embedded is widely used.
- this core wire is arranged outside the compressed rubber layer that performs frictional transmission with the pulley and inside the back rubber layer that is the outermost layer of the transmission belt.
- this core wire is bonded and embedded in a rubber layer that is usually formed with a lower elastic modulus than a compressed rubber layer called an adhesive rubber layer! /
- EPDM ethylene propylene terpolymer
- polyester fiber, aramid fiber, polyamide fiber, etc. which have excellent heat resistance and strength, are usually used for the core wire! /
- each component material must have heat resistance, cold resistance, It is important not only to use those with improved properties such as wear resistance and bending fatigue resistance, but also to improve the durability of the interface between each component.
- Ethylene a-olefin elastomers such as EPDM are usually less polar and less adhesive than other rubbers.
- the adhesive rubber layer is formed using a highly fluid and flexible rubber so that it flows during hot pressing in the transmission belt molding and surely adheres to the core wire.
- the compressed rubber layer is usually formed so that the rubber contains short fibers and the like and has an extremely higher elastic modulus than the adhesive rubber layer from the viewpoint of preventing deformation and improving the transmission capability of the transmission belt.
- Patent Documents 1 and 2 in order to suppress the occurrence of cracks at the bonded interface between the compressed rubber layer and the adhesive rubber layer, or the core wire and these rubber layers, the short fibers and carbon It describes that black is included to form an adhesive rubber layer with a higher elastic modulus than before.
- the core wire is arranged at the interface between the compression rubber layer and the adhesive rubber layer, and the core wire is adhered to both the rubber layer of the compression rubber layer and the adhesive rubber layer.
- Patent Document 4 describes that an adhesive rubber layer is formed using a rubber having a high elastic modulus at a high temperature.
- the adhesive rubber layer is made to have a high elastic modulus as described in Patent Documents 1 and 2, the high elastic modulus is increased when used over a small-diameter pulley.
- the problem of dynamic heat generation of the adhesive rubber layer may become obvious.
- chlorosulfonated polyethylene or hydrogenated-tolyl rubber should be used between the rubber layer using EPDM and the core wire. Is described in Patent Document 5. However, in practice, the adhesiveness has not been sufficiently improved, and is practically difficult.
- Patent Document 1 Japanese National Fair 1 10513
- Patent Document 2 Japanese Patent Laid-Open No. 10-103413
- Patent Document 3 Japanese Patent Publication No. 57-204351
- Patent Document 4 Japanese Special Table 2004-507679
- Patent Document 5 Japanese Patent Laid-Open No. 10-103417
- An object of the present invention is to provide a transmission belt in which a decrease in transmission efficiency is suppressed and durability is improved.
- the present inventors have found that the durability can be improved while suppressing a decrease in the transmission efficiency of the transmission belt by setting the rubber layer to which the core wire is bonded to predetermined physical properties. IJ has been completed.
- the present invention has been made to solve the above-mentioned problems, and the invention according to the transmission belt includes a rubber layer in which an ethylene a -refin elastomer is used as a base rubber and is formed in the belt longitudinal direction.
- the transmission belt is bonded to the rubber layer and has a core wire embedded in the longitudinal direction of the belt, and the rubber layer bonded to the core wire has a jumometer hardness (Shore A) of 72 or more 85
- the tensile stress at 10% elongation in the belt longitudinal direction at 25 ° C is 0.5 MPa or more and 1.7 MPa or less.
- the weight increase after being immersed in 25 ° C light oil for 48 hours is 90% or less, or the weight increase force after being immersed in 25 ° C toluene for 48 hours is 3 ⁇ 40% or less. It is characterized by being formed!
- the base rubber and in during this specification, are intended to rubber used in the 50 weight 0/0 or more in the rubber component used in the rubber layer.
- durometer hardness (Shore A) is intended to be a value measured according to JIS K 6253.
- Tensile stress at 10% elongation is a tensile test based on JIS K 6251. It is intended to be a value obtained by conducting and measuring the stress when the gap between the marked lines is extended by 10%.
- a rubber layer formed by using ethylene-a-olefin elastomer as a base rubber is formed in a belt longitudinal direction, and the belt is bonded to the rubber layer.
- a rubber belt embedded in the longitudinal direction with a core wire embedded therein, and the rubber layer attached to the core wire is in a tensile mode in the longitudinal direction of the belt, with a static load of 3 kgfZcm, a dynamic strain of 0.4%, and a frequency. It is formed so that the storage elastic modulus measured by dynamic viscoelasticity at 10Hz and 25 ° C is lOMPa or more and 50MPa or less and tan ⁇ is 0.15 or less. ing.
- the invention that is effective for the method of manufacturing a transmission belt is that a rubber layer in which an ethylene- ⁇ -olefin elastomer is used as a base rubber and is cross-linked with an organic peroxide is formed in the longitudinal direction of the belt.
- the rubber layer to be bonded to the wire has a weight increase of 90% or less after being immersed in light oil at 25 ° C for 48 hours, or the weight increase after being immersed in toluene at 25 ° C for 48 hours is 80%.
- the organic peracid compound formed so as to have any of the following forces Effective peroxide basic force The rubber layer is crosslinked by blending the organic peroxide compound with the rubber component so that the rubber component used in the rubber layer is 0.021 mol or more per 10 g of the rubber component. As a feature.
- the effective peroxide group means a peroxide group that can be cleaved at the time of crosslinking among the peroxide groups in the molecule of the organic peroxide.
- the state where the effective peroxide group of the organic peroxide is 0.021 mol or more means that the amount of the organic peroxide per 100 g of rubber component is divided by the amount of the organic peroxide.
- the value obtained by multiplying the effective peroxide group in one molecule of the organic peroxide is intended to be 0.021 or more.
- a further invention for producing a transmission belt is that a rubber layer is formed in the longitudinal direction of the belt in which ethylene a-olefin elastomer is used as a base rubber and crosslinked with an organic peroxide.
- the storage elastic modulus measured by dynamic viscoelasticity at a static load of 3 kgfZcm 2 , dynamic strain of 0.4%, frequency of 10 Hz, and 25 ° C in the mode is not less than lOMPa and not more than 50 MPa and tan S is not more than 0.15.
- the organic peroxide is added to the rubber component so that the effective peroxide group of the organic peroxide is 0.021 mol or more per lOOg of the rubber component used in the rubber layer. Characterized by carrying out cross-linking of layers Yes.
- the rubber layer force durometer hardness (Shore A) bonded to the core wire is 72 or more and 85 or less, or the tensile stress at 10% elongation in the belt longitudinal direction at 25 ° C is 0. .5MPa or more 1. Since it is formed to be any one of 7MPa or less, the hysteresis loss can be reduced compared to the case where the rubber layer bonded to the core wire has a high elastic modulus, and the transmission efficiency can be reduced. Can be suppressed.
- ethylene a-olefin elastomer is used as the base rubber for the rubber layer that is bonded to the core wire, the heat resistance and cold resistance of the rubber layer itself are improved to improve the transmission belt. Durability can be improved.
- the rubber layer force durometer hardness (Shore A) bonded to the core wire is 72 or more and 85 or less, or the tensile stress at 10% elongation at 25 ° C is 0.5 MPa or more and 1.7 MPa or less.
- the weight increase after immersing the rubber layer in 25 ° C light oil for 48 hours is 90% or less, or the rubber layer is immersed in toluene at 25 ° C for 48 hours. After that, the weight increase is 80% or less, and it is formed so as to be shifted! Dynamic heat generation during belt running can be suppressed, and separation and pop-out can be suppressed. That is, durability can be improved while suppressing a reduction in transmission efficiency of the transmission belt.
- the weight increase after the rubber layer is immersed in 25 ° C light oil for 48 hours is 90% or less, or the weight increase after the rubber layer is immersed in toluene at 25 ° C for 48 hours is 80%. If the rubber layer is adhered to the core wire from the transmission belt, the core wire is further removed, and this rubber is removed. It is obtained by immersing in a sufficient amount of light oil or toluene to swell the layer and measuring the change in weight before and after immersion.
- the initial weight before immersion (M) is about 0.1 mm thick from the transmission belt.
- the rubber pieces can be taken out so that the total is about 50 mg and weighed with an electronic balance having a minimum measurement unit of about 0.1 mg.
- the rubber sample weighed at the initial weight is wrapped in a mesh of 50 / zm mesh, for example, and used as a measurement sample.
- This measurement sample is light oil at 25 ° C or immersed in toluene for 48 hours. By soaking, the weight can be increased by swelling with light oil or toluene.
- the weight (M) of the rubber sample after swelling which is increased in weight by swelling with light oil or toluene, is filtered after taking out the swollen rubber sample with light oil or toluene.
- each weight measurement is carried out, for example, five times, and the median value of the following five ⁇ ⁇ values obtained by the following formula is calculated, whereby this median value is reduced to 25 ° C gas oil or toluene. It can be calculated as the weight increase after 48 hours of immersion.
- the viscoelasticity measurement of the rubber layer bonded to the core wire is performed in a tensile mode in the belt longitudinal direction at a static load of 3kgfZcm 2 , a dynamic strain of 0.4%, a frequency of 10Hz, and 25 ° C.
- the storage elasticity is set so that it is not less than lOMPa and not more than 50 MPa, the hysteresis loss and the like can be reduced compared to the case where the rubber layer has a high elastic modulus, and the reduction in transmission efficiency can be suppressed.
- the rubber layer bonded to the core wire uses ethylene a-olefin elastomer as the base rubber, the heat resistance and cold resistance of the rubber layer itself are improved to improve the durability of the transmission belt. Can be improved.
- a rubber layer formed by cross-linking ethylene ⁇ -olefin elastomer as a base rubber with an organic peroxide is formed in the longitudinal direction of the belt, and is attached to the rubber layer.
- the rubber layer is bonded to the core wire to form a durometer hardness by forming the organic peroxide compound in the rubber layer and crosslinking the rubber layer.
- the degree of stress (Shore A) is 72 or more and 85 or less, or the tensile stress at 10% elongation in the belt longitudinal direction at 25 ° C is 0.5 MPa or more and 1.7 MPa or less.
- the weight increase is less than 90% after the rubber layer bonded to the core wire is immersed in 25 ° C light oil for 48 hours, or the weight increase after 48 hours of immersion in toluene at 25 ° C. It becomes easy to form so as to have any force of 3 ⁇ 40% or less.
- a rubber layer formed by cross-linking ethylene ⁇ -olefin elastomer as a base rubber with an organic peroxide is formed in the belt longitudinal direction, and is attached to the rubber layer.
- the rubber layer to be bonded to the core wire is formed in a tension mode in the longitudinal direction of the belt with a static load of 3 kgfZcm 2
- FIG. 1 is a cross-sectional view showing a transmission belt according to an embodiment.
- FIG. 2 is a schematic diagram showing a test method for an adhesion durability test.
- the V-ribbed belt of this embodiment is formed in an endless shape.
- the belt inner peripheral side Are provided with ribs 6 that are formed in a trapezoidal shape whose cross section is narrower toward the inner peripheral side, and the ribs 6 are provided in a plurality of rows in the belt width direction.
- a compressed rubber layer 5 is formed as a rubber layer for forming the rib 6 on the inner peripheral side of the V-ribbed belt 1, that is, on the side of the transmission surface contacting the pulley.
- the rubber layer on the outer peripheral side of the compressed rubber layer 5 is formed with an adhesive rubber layer 3, and the rubber layer on the outer peripheral side of the adhesive rubber layer 3 is formed with a back rubber layer 2 which is the outermost layer of the V-ribbed belt 1. ing.
- the V-ribbed belt is formed by continuously forming rubber layers of the compression rubber layer 5, the adhesive rubber layer 3, and the back rubber layer 2 in the longitudinal direction of the belt.
- a plurality of core wires 4 are embedded in the adhesive rubber layer 3 by being adhered to the rubber of the adhesive rubber layer 3 with a certain interval in the width direction of the V-ribbed belt 1.
- the back rubber layer 2 is formed using a rubber sheet.
- the adhesive rubber layer 3 is formed by using ethylene a-olefin elastomer as a base rubber, and is formed by crosslinking with an organic peroxide.
- a compounding agent such as carbon black, an inorganic filler or a short fiber is used in addition to the rubber component based on the ethylene (X-olefin elastomer) and an organic peroxide. ing.
- the carbon black used for the adhesive rubber layer 3 is not particularly limited as long as it is generally used for the rubber of a transmission belt.
- carbon black called furnace black, channel black, thermal black, acetylene black, etc. Can be used.
- the amount of carbon used in the adhesive rubber layer 3 depends on the amount of other inorganic fillers, the amount of short fibers, etc., and the type of ethylene- ⁇ -olefin elastomer that contains them. In general, when carbon black called FEF is used, the amount is preferably 80 parts by weight or less with respect to 100 parts by weight of a rubber component based on ethylene elastomer.
- the inorganic filler used in the adhesive rubber layer 3 is not particularly limited as long as it is generally used for a rubber of a transmission belt.
- silica, calcium carbonate, talc, or the like may be used. it can.
- the short fibers used in the adhesive rubber layer 3 include, for example, polyester fibers, polyvinyl alcohol fibers, polyamide fibers, cotton fibers, silk fibers, hemp fibers, wool fibers, cellulose fibers, and aromatic polyamides. Fibers, wholly aromatic polyester fibers, polyparaphenylene benzbisoxazole fibers, carbon fibers, polyketone fibers, basalt fibers, etc. can be used, among which polyamide fibers, cotton fibers, aromatic polyamide fibers, polybulu alcohol fibers Is preferred.
- ethylene a-olefin elastomer used for the adhesive rubber layer 3 for example, ethylene propylene copolymer, ethylene propylene terpolymer, ethylene otaten copolymer, and ethylene butene copolymer can be used.
- ethylene-propylene-gen-terpolymer is preferred because it is low in cost, has excellent workability, and has high crosslinking efficiency.
- Examples of the gen component of this ethylene propylene terpolymer include linear chains such as 1,4 monohexagen, 1,5 hexagen, 1,7-octadiene, 1,9-decadiene, and 1,6-octadiene.
- Branched genes such as diene, 5-methyl-1,4 monohexagen, 3,7 dimethyl-1,6-octagen, 3,7 dimethyl-1,7-octagen, 1,3 cyclopentagen, 1, 4 -Cyclocyclogens such as cyclohexagen, 1,5 cyclooctadiene and 1,5 cyclododecadiene, tetrahydroindene, methyltetrahydroindene, dicyclopentagen, bicyclo (2, 2, 1) 5 Gen, alkell, alkylidene, 5—methylene 2 norbornene, 5 —probelu 2 norbornene, 5 isopropylidene 2 norbornene, 5— 4 —Cyclopentyl) Cycloalkenyls such as 2 norbornene, 5 cyclohexylidene, 1 norbornene, 5 Biruo 2 norbornene, and cycloalkylidene norbornene and 5 ethylidene 2
- the ethylene ⁇ - O reflex in elastomer one are used in 50 wt 0/0 or more of the total rubber component, a rubber component other than it, for example, natural rubber, styrene butadiene E down copolymerization Combined rubber, chloroprene rubber, hydrogenated-tolyl-butadiene rubber, alkylated rubber Rubbers such as borosulfonated polyethylene, isoprene rubber, epichlorohydrin rubber, butyl rubber, acryl rubber, etc. can be appropriately provided as long as the effects of the present invention are not impaired.
- An organic peroxide is used for crosslinking of the ethylene propylene terpolymer (or rubber mixed with other rubber).
- organic peroxide examples include di-t-butyl peroxide, dicumyl peroxide, t-butyl tamil peroxide, 1,1 t-butyl peroxide 3, 3, 5-trimethylcyclohexane, 2, 5 dimethyl 2, 5 Di- (t-butylperoxy) hexane, 2,5-dimethyl-2,5-di-tert-butylperoxy) hexyne-3, bis (t-butylperoxydiisopropyl) benzene, 2,5 dimethyl-2,5-di (benzoyloxy) Xan, t-butyl peroxybenzoate, t-butyl peroxy 2-ethylhexyl carbonate, etc. can be used.
- a crosslinking aid can be used in combination with the crosslinking agent using the organic peroxide.
- crosslinking aids include triallyl isocyanurate, triallyl cyanurate, 1,2 polybutadiene, metal salts of unsaturated carboxylic acids, oximes, guanidine, trimethylol propane pan trimethacrylate, ethylene glycol dimethyl ester. Tartrate, N-N'-m-phenol bismaleimide or the like can be used.
- the compounding agent for forming the adhesive rubber layer 3 does not impair the effects of the present invention! In the range of ⁇ , anti-aging agents, scorch inhibitors, plasticizers, processing aids, pigments, flame retardants and the like that are usually used in rubber compositions for transmission belts can be contained.
- the adhesive rubber layer 3 using such a compounding agent has a durometer hardness after the formation of the transmission belt.
- the weight increase after being immersed in light oil at 25 ° C for 48 hours is 90% or less, or the weight increase after being immersed in toluene at 25 ° C for 48 hours.
- the caro is less than 80%!
- Adhesive rubber layer strength Durometer hardness (Shore A) is 72 or more and 85 or less, or the tensile stress at 10% elongation in the belt longitudinal direction at 25 ° C is 0.5 MPa or more and 1.7 MPa or less.
- the weight increase after the adhesive rubber layer is immersed in 25 ° C light oil for 48 hours is 90% or less, or the weight increase after 48 hours is immersed in toluene at 25 ° C is 80% or less.
- the reason why it is formed so as to have a displacement force is that if this adhesive rubber layer to which the core wire is bonded is out of this range force, cracks and separation due to the cracks will occur during operation of the transmission belt. It is.
- the compressed rubber layer 5 and the back rubber layer 2 can be formed using the same composition as that used for the adhesive rubber layer 3, and if necessary, the functions required for each. It can also be formed using a composition with a different formulation content to be added.
- all the layers are formed of a composition containing ethylene a-olefin elastomer as a base rubber in that the adhesion between each layer can be more reliably increased!
- the adhesive rubber layer is crosslinked with an organic peroxide
- the compressed rubber layer 5 and the back rubber layer 2 are bridged with a crosslinking system other than an organic peroxide such as io crosslinking or resin crosslinking. It is pretty easy to bridge.
- the back rubber layer 2 is a force that can be formed by a rubber sheet.
- a rubber-coated canvas can be used instead of the rubber sheet.
- the rubber sheet of the back rubber layer, the rubber of the rubber-coated canvas, and the canvas are generally used.
- the rubber and canvas used in this transmission belt can be used.
- it can be formed of a rubber sheet using the same compounding agent as the compressed rubber layer and the adhesive rubber layer.
- the core wire bonded and embedded in the adhesive rubber layer includes polyester fiber (polyethylene terephthalate fiber, polyethylene naphthalate fiber, etc.), polyamide fiber (6, 6 nails). Nylon fiber, 6 nylon fiber, 4, 6 nylon fiber, etc.), aromatic polyamide fiber (aramide fiber), wholly aromatic polyester fiber (polyarylate fiber), polyparaphenol-lenbenzbisoxazole fiber, carbon fiber, polyketone fiber, basalt fiber, It is possible to use glass fiber.
- polyester fiber, polyamide fiber, and aromatic polyamide fiber are suitable.
- core wire that also has such material strength, it is usually necessary to use a material that has been pretreated with isocyanate or epoxy and resorcin / formalin 'latex treatment (hereinafter referred to as “RFL treatment”). If necessary, it can be further overcoated with rubber glue.
- RTL treatment resorcin / formalin 'latex treatment
- Various compounding materials used in the rubber composition of such a compressed rubber layer, an adhesive rubber layer, and a back rubber layer are kneaded rubbers such as kneaders, Banbury mixers, rolls, and biaxial kneaders. It can be kneaded by means.
- the unvulcanized rubber composition kneaded by the kneading means can be sheeted by a sheeting means such as a calender roll, and a V-ribbed belt can be produced using the sheet.
- the back rubber layer and the compression rubber layer are arranged so that the direction of travel of the calender roll is the width direction of the transmission belt (direction perpendicular to the longitudinal direction), and the adhesive rubber layer is aligned with the direction of travel of the calender roll.
- a calender roll sheet is rolled and laminated on a cylindrical mold so as to be in the longitudinal direction, and the rubber sheet of the back rubber layer, the rubber and core of the adhesive rubber layer, the rubber of the compression rubber layer, etc.
- the adhesive rubber layer to which the core wire is bonded at this time is blended with an organic peroxide so that the effective peroxide group of the organic peroxide is 0.021 mol or more per lOOg of the rubber component.
- the adhesive rubber layer has a durometer hardness (Shore A) of 7 2 or more and 85 or less, or a tensile stress at 10% elongation in the belt longitudinal direction at 25 ° C of 0.5 MPa or more 1 It is formed so as to be any force of 7 MPa or less, and the force is 90% or less after the rubber layer to be bonded to the core wire is immersed in light oil at 25 ° C for 48 hours. It can be easily formed so that the increase in weight after dipping in toluene at 25 ° C for 48 hours is less than 80%.
- the adhesive rubber layer contains short fibers in an amount of not more than 20 parts by weight per 100 parts by weight of the rubber component of the adhesive rubber layer, whereby the adhesive rubber layer has a durometer hardness (Shore A). It is formed so that the tensile stress at 10% elongation in the longitudinal direction of the belt at 25 ° C is 72 to 85 or less, and 0.5 MPa or more and 7 MPa or less.
- the weight increase after being immersed in light oil for 48 hours should be 90% or less, or the weight increase after being immersed in 25 ° C for 48 hours should be less than 80%. Can be made easier. From this point of view, it is preferable that the short fiber is contained in an amount of 1 to LO parts by weight with respect to 100 parts by weight of the rubber component contained in the adhesive rubber layer.
- the V-ribbed belt of the second embodiment has the same configuration as the first embodiment in the compression rubber layer, the adhesive rubber layer, the core wire, the back rubber layer, and the like, and the compounding agent used in each configuration is also the same. This is the same as the first embodiment.
- the adhesive rubber layer to which the core wire is bonded is a tensile mode in the belt longitudinal direction
- the static load is 3 kgfZcm 2
- the dynamic strain is 0.4. %
- the storage elastic modulus is from 1 OMPa to 50 MPa and tan ⁇ is 0.15 or less.
- the adhesive rubber layer to which the V-belt is bonded to the core wire in the first embodiment has a durometer hardness (Shore ⁇ ) of 72 or more and 85 or less, or in the belt longitudinal direction at 25 ° C. Hysteresis loss, etc. compared to the case where the tensile stress at 10% elongation is 0.5 MPa or more and 1.7 MPa or less and the rubber layer bonded to the core wire has a high elastic modulus.
- the weight increase after immersing the adhesive rubber layer in light oil at 25 ° C for 48 hours is 90% or less, or the rubber layer is dissolved in toluene at 25 ° C.
- the V-belt in this second embodiment has a static load of 3 kgfZcm 2 and a dynamic strain of 0.4 in the tension mode in the longitudinal direction of the belt.
- % Frequency of 10Hz, 25 ° C Dynamic viscoelasticity is measured so that the storage elastic modulus is 1OMPa or more and 5OMPa or less. The decrease in transmission efficiency is reduced, and the force is also 0.
- the ta ⁇ ⁇ of the adhesive rubber layer measured by dynamic viscoelasticity at a static load of 3kgfZcm 2 , dynamic strain of 0.4%, frequency of 10Hz, and 25 ° C is 0. It is formed to 15 or less to suppress the generation of cracks and separation caused by the cracks by suppressing dynamic heat generation.
- the adhesive rubber layer of the V-ribbed belt of the second embodiment is also an effective peroxide of the organic peroxide per rubber component lOOg of the adhesive rubber layer.
- this adhesive rubber layer is in a tensile mode in the belt longitudinal direction, with a static load of 3 kgfZcm 2 , dynamic strain of 0.4. %, Frequency 10 Hz, and 25 ° C dynamic viscoelasticity can be easily formed so that the storage elastic modulus is not less than lOMPa and not more than 50 MPa.
- the adhesive rubber layer is made to contain short fibers in an amount of not more than 20 parts by weight, preferably in the range of 1 to 10 parts by weight per 100 parts by weight of the rubber component of the adhesive rubber layer.
- the storage elastic modulus by dynamic viscoelasticity measurement measured at a static load of 3kgfZcm 2 , dynamic strain of 0.4%, frequency of 10Hz, and 25 ° C should be greater than lOMPa and less than 50MPa.
- the V-ribbed belt of the second embodiment is the same as that of the first embodiment in that it can be made easier.
- the core wire includes the adhesive rubber layer and the compressed rubber.
- the rubber layer bonded to the core wire has a durometer hardness (Shore A) of 72 to 85 or a tensile stress at 10% elongation in the longitudinal direction of the belt at 25 ° C.
- the core wire is bonded and sandwiched between both the adhesive rubber layer and the compressed rubber layer, or the back rubber layer, the adhesive rubber layer, and the compressed rubber layer are separated from each other.
- the rubber layer bonded to the core wire is pulled in the longitudinal direction of the belt in a tensile mode in a static load of 3 kgfZcm 2 .
- the intent of the present invention is that the storage elastic modulus measured by dynamic viscoelasticity at 0.4% dynamic strain, frequency 10Hz and 25 ° C is lOMPa or more and 50MPa or less and tan S is 0.15 or less. It is the range to do.
- a coating rubber layer that is coated on the surface of the core wire by coating it on the surface of the core wire is applied to the belt at a durometer hardness (Shore A) of 72 to 85 or 25 ° C.
- the tensile stress at 10% elongation in the longitudinal direction is 0.5 MPa or more and 1. 7 MPa or less, and the applied rubber layer is bonded to the core wire to 25 ° C light oil.
- the transmission belt is not limited to the V-ribbed belt. Belts, flat belts and the like are also within the intended scope of the present invention.
- Table 1 shows the compounding agents used in each Example and Comparative Example, and Table 2 shows the cords.
- Table 3 shows the composition of the back rubber layer and the compressed rubber layer.
- Sarako, each example, comparative belt Tables 4 and 5 show the composition of the adhesive rubber layer and the cores used.
- EPDM1 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 EPDM1
- the unit of numerical values in the table is parts by weight.
- adhesive rubber layers used in the transmission belts of Examples 1 to 6 (Examples 7 to 9 are the same as Example 6) and Comparative Examples 1 to 4 (Comparative Examples 5 to 7 are the same composition as Comparative Example 1).
- the materials were blended based on the blending, kneaded with a Banbury mixer, and an unvulcanized sheet having a thickness of 0.4 mm was prepared with a calender roll.
- 6 sheets of this unvulcanized sheet are stacked to 170 ° CX A 20-minute hot press was performed to prepare a sheet for tear strength test and tensile test evaluation of about 2.2 mm thickness.
- a tear specimen was cut out from each physical property evaluation sheet and subjected to a tear-type tear test in order to perform a tear test in the direction of the calendar according to JIS K 6252.
- Table 6 shows the measurement results of ⁇ I cracking force and elongation.
- a JIS No. 3 dumbbell specimen was cut out from each physical property evaluation sheet in the direction of the calendar, and a tensile test was conducted in accordance with JIS ⁇ 6251.
- 3 ⁇ 4J constant items are 10% modulus (M), 20% modulus (M), 50% modulus (M)
- the storage elastic modulus (E,) and tan ⁇ are calculated at a static load of 3kgfZcm 2 , dynamic strain of 0.4%, frequency of 10Hz, and 25 ° C. It was measured. Similarly, measurements were performed at 80 ° C, 100 ° C, 130 ° C, and 150 ° C. In the measurement, a viscoelasticity measuring device “RSAII” manufactured by Rheometrics was used. The results are shown in Table 6.
- the compounding powers in Tables 4 and 5 were also calculated for the effective peroxide groups per lOOg of rubber component in the adhesive rubber layer.
- the purity of the organic peroxides (dicumyl peroxide) used in the formulations in Tables 4 and 5 was examined and found to be 40%.
- the molecular weight of dicumyl peroxide is 270.38 (g / mol)
- the compound per rubber component lOOg in Table 4 and Table 5 The effective peroxide group per lOOg of rubber component when the amount is X (g) is obtained by the following formula.
- materials are blended based on the blending of the compression rubber layer, adhesive rubber layer, and back rubber layer used in the power transmission belts of each Example and Comparative Example, kneaded with a Banbury mixer, and unvulcanized for the compression rubber layer with a calender roll.
- a sheet (0.8 mm thickness), an unvulcanized sheet for the adhesive rubber layer (0.4 mm thickness), and an unvulcanized sheet for the back rubber layer (0.6 mm thickness) were prepared.
- the unvulcanized sheet for the compression rubber layer and the unvulcanized sheet for the back rubber layer are wound around a cylindrical forming drum so that the width direction of the transmission belt is aligned with the calendar direction, and the unvulcanized sheet for the adhesive rubber layer is not used.
- the vulcanized sheet was wound around a cylindrical forming drum so that the longitudinal direction (circumferential direction) of the transmission belt was aligned with the calendar, and an unvulcanized laminate was prepared.
- the core wire used was treated with resorcin 'formaldehyde' latex (RFL).
- the unvulcanized laminate is vulcanized in a vulcanizing can and demolded to obtain a cylindrical preform.
- a rib shape was formed on the surface of this cylindrical preform using a grinding mortar, and cut into a width corresponding to three ribs to produce a V-ribbed belt having substantially the same cross-sectional shape as FIG.
- the total thickness of this V-ribbed belt (hi in Fig. 1) was 4.3 mm, the rib height (h2 in Fig. 1) was 2. Omm, and the belt pitch circumference was 1100 mm.
- the adhesive rubber layer portion was cut out to a thickness of about 0.1 mm from the power transmission belts of the examples and comparative examples manufactured as described above, and the cut out 0.1 mm-thick sample pieces were obtained. After stacking, the durometer hardness was measured using a Type A durometer. The results are shown in Table 6.
- the adhesive rubber layer portion is cut out to a thickness of about 0.1 mm from the power transmission belts of each Example and Comparative Example, and the total amount of the cut sample pieces is about 50 mg so that the accuracy of the minimum measurement unit is 0.1 mg.
- the initial weight (M) was weighed with an electronic balance having Then this sample
- the piece was wrapped in a 50 ⁇ m square mesh and immersed in toluene at 25 ° C. for 48 hours. After soaking for 48 hours, take out the sample piece together with the true mesh and put the sample piece wrapped in the true mesh on the filter paper, 23 ⁇ 2 ° C, relative humidity 60 ⁇ 5% of Left in the environment for 30 minutes. Thereafter, the sample was weighed with an electronic balance and the sample weight (M) after immersion in toluene was measured.
- the weight increase rate was measured using five samples for each example and comparative example.
- Table 6 shows the intermediate values.
- the V-ribbed belts of each of the examples and comparative examples produced as described above were spread over three pulleys, and an adhesion durability test was performed. That is, using a driving pulley 21 with a diameter of 120 mm, a driven pulley 22 with a diameter of 120 mm, and an idler pulley 23 with a diameter of 40 mm, the driven pulley 22 has a load of 12 ps (about 8.8 kW), and the idler pulley 23 has 834 N While rotating the drive pulley 21 at 490 Orpm while driving the transmission belt 1 in the direction of the arrow in Fig. 2 and running the transmission belt 1 in an atmosphere of 90 ⁇ 2 ° C, the temperature of the back surface of the transmission belt is adjusted after 50 hours. It was measured. The results are shown in Table 7.
- the time until the total length of the separation between the core and the adhesive rubber layer (the total of the separation lengths if there are multiple locations) is 50 mm is defined as the attachment durability time. Measured. The results are shown in Table 7.
- Comparative Example 1 the adhesion durability is inferior to that of the transmission belt of the example.
- the transmission belts of Comparative Examples 2 and 3 in which the increase in weight after immersion in toluene and the increase in weight after immersion in light oil are larger than those in the examples are more durable than those in the examples. Is inferior.
- Comparative Example 4 corresponds to the case where an adhesive rubber layer is formed by using a rubber having a high elastic modulus at a high temperature as described in Patent Document 4, but is different from the transmission belt of the example. As a result, the dynamic heat generation is large, resulting in poor adhesion durability.
- Example 5 From comparison between Example 5 and Examples 6 to 9, it can be seen that the adhesive durability can be further improved by adding a short fiber to the adhesive rubber layer to which the core wire is adhered.
- Example 2 Further, from the comparison between Example 1 and Example 2, it was found that the use of ethylene propylene terpolymer containing dicyclopentagen as the gen component was more excellent in adhesion durability. I know you get.
- the transmission belt can be prevented from being reduced in transmission efficiency and improved in durability.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
- Tires In General (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/281,700 US9115784B2 (en) | 2006-03-07 | 2007-02-21 | Transmission belt |
DE112007000568.8T DE112007000568B4 (de) | 2006-03-07 | 2007-02-21 | Treibriemen, Verfahren zum Herstellen eines Treibriemens |
CN2007800079238A CN101395401B (zh) | 2006-03-07 | 2007-02-21 | 传动带 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-060935 | 2006-03-07 | ||
JP2006060935A JP5016239B2 (ja) | 2006-03-07 | 2006-03-07 | 伝動ベルト |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007102310A1 true WO2007102310A1 (ja) | 2007-09-13 |
Family
ID=38474752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/053132 WO2007102310A1 (ja) | 2006-03-07 | 2007-02-21 | 伝動ベルト |
Country Status (5)
Country | Link |
---|---|
US (1) | US9115784B2 (ja) |
JP (1) | JP5016239B2 (ja) |
CN (1) | CN101395401B (ja) |
DE (1) | DE112007000568B4 (ja) |
WO (1) | WO2007102310A1 (ja) |
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US20110124453A1 (en) * | 2008-07-17 | 2011-05-26 | Bando Chemical Industries, Ltd. | Power transmission belt |
US20110218069A1 (en) * | 2008-10-23 | 2011-09-08 | Bando Chemical Industries, Ltd | Friction drive belt |
US20130005883A1 (en) * | 2010-03-16 | 2013-01-03 | Hidenari Nakahama | Packing for laminator |
WO2014064879A1 (ja) * | 2012-10-23 | 2014-05-01 | バンドー化学株式会社 | 伝動ベルト |
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JP5060248B2 (ja) * | 2007-11-06 | 2012-10-31 | バンドー化学株式会社 | 平ベルト |
CN102362095B (zh) | 2009-03-26 | 2016-03-16 | 阪东化学株式会社 | 平带 |
JP2010276127A (ja) * | 2009-05-29 | 2010-12-09 | Mitsuboshi Belting Ltd | Vリブドベルト |
KR101292987B1 (ko) * | 2009-12-14 | 2013-08-02 | 반도 카가쿠 가부시키가이샤 | 마찰 전동벨트 |
US20120017150A1 (en) * | 2010-07-15 | 2012-01-19 | MySongToYou, Inc. | Creating and disseminating of user generated media over a network |
JP5367006B2 (ja) * | 2011-03-31 | 2013-12-11 | ゲイツ・ユニッタ・アジア株式会社 | 摩擦伝動ベルト |
CA2750750A1 (en) * | 2011-08-29 | 2013-02-28 | James Haythornthwaite | Food transport belt |
KR102070476B1 (ko) * | 2012-07-06 | 2020-01-29 | 반도 카가쿠 가부시키가이샤 | 전동 벨트 |
WO2015045255A1 (ja) * | 2013-09-26 | 2015-04-02 | バンドー化学株式会社 | Vベルト及びその製造方法 |
DE112015000769T5 (de) * | 2014-02-12 | 2016-11-10 | Bando Chemical Industries, Ltd. | Verfahren zum Herstellen eines Übertragungsriemens und Übertragungsriemen |
JP6483745B2 (ja) * | 2016-04-15 | 2019-03-13 | 三ツ星ベルト株式会社 | 摩擦伝動ベルト |
JP6616793B2 (ja) * | 2016-04-15 | 2019-12-04 | 三ツ星ベルト株式会社 | 摩擦伝動ベルト |
WO2017179688A1 (ja) * | 2016-04-15 | 2017-10-19 | 三ツ星ベルト株式会社 | 摩擦伝動ベルト |
JP6748152B2 (ja) * | 2017-07-04 | 2020-08-26 | 三ツ星ベルト株式会社 | Vリブドベルト |
JP6652678B1 (ja) * | 2018-10-12 | 2020-02-26 | 三ツ星ベルト株式会社 | 摩擦伝動ベルトおよびその製造方法 |
JP7285374B2 (ja) * | 2021-04-30 | 2023-06-01 | バンドー化学株式会社 | 歯付ベルト |
JP7448724B2 (ja) | 2021-11-19 | 2024-03-12 | バンドー化学株式会社 | 伝動ベルト |
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JP2006153059A (ja) * | 2004-11-25 | 2006-06-15 | Bando Chem Ind Ltd | 伝動ベルト |
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- 2007-02-21 CN CN2007800079238A patent/CN101395401B/zh not_active Expired - Fee Related
- 2007-02-21 DE DE112007000568.8T patent/DE112007000568B4/de not_active Expired - Fee Related
- 2007-02-21 US US12/281,700 patent/US9115784B2/en not_active Expired - Fee Related
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US20110124453A1 (en) * | 2008-07-17 | 2011-05-26 | Bando Chemical Industries, Ltd. | Power transmission belt |
US8974336B2 (en) * | 2008-07-17 | 2015-03-10 | Bando Chemical Industries, Ltd. | Power transmission belt |
US20110218069A1 (en) * | 2008-10-23 | 2011-09-08 | Bando Chemical Industries, Ltd | Friction drive belt |
US8882621B2 (en) * | 2008-10-23 | 2014-11-11 | Bando Chemical Industries, Ltd. | Friction drive belt |
US20130005883A1 (en) * | 2010-03-16 | 2013-01-03 | Hidenari Nakahama | Packing for laminator |
WO2014064879A1 (ja) * | 2012-10-23 | 2014-05-01 | バンドー化学株式会社 | 伝動ベルト |
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Also Published As
Publication number | Publication date |
---|---|
JP5016239B2 (ja) | 2012-09-05 |
DE112007000568B4 (de) | 2020-06-10 |
DE112007000568T5 (de) | 2009-04-02 |
JP2007239821A (ja) | 2007-09-20 |
CN101395401B (zh) | 2011-06-01 |
US20090011884A1 (en) | 2009-01-08 |
US9115784B2 (en) | 2015-08-25 |
CN101395401A (zh) | 2009-03-25 |
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