JP2003027376A - ADHEREND OF ETHYLENE/alpha-OLEFIN RUBBER COMPOSITION WITH FIBER AND DRIVING BELT USING THE SAME - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adherend of fiber with an ethylene/α-olefin rubber composition capable of well adhering the ethylene/α-olefin rubber composition with a textile or the like such as a fiber cord or a cover canvas as the core line of a driving belt, and to provide a driving belt using the adherend as the adhering rubber layer. SOLUTION: The V-ribbed belt 1 comprises an adhering rubber layer 3 obtained by burying a fiber cord in an ethylene/α-olefin rubber composition along the longitudinal direction of the belt and a compression rubber layer 4 comprising the ethylene/α-olefin rubber composition, wherein the adhering rubber layer 3 comprises an adherend obtained by performing adhesion treatment of fiber with an RFL treating liquid obtained by adding a vulcanization accelerator to a resorcin-formalin-rubber latex solution comprising an ethylene-α- olefin-diene copolymer rubber latex, adhering the adherend with an unvulcanized rubber composition of an ethylene/α-olefin rubber and vulcanizing the obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive product of an ethylene / α-olefin rubber composition and a fiber and a transmission belt, and more specifically, to an excellent adhesion of the ethylene / α-olefin rubber composition and a fiber cord. Ethylene that can
The present invention relates to an adhesion product of an α-olefin rubber composition and a fiber cord, and a transmission belt using the adhesion product as an adhesion rubber layer of a transmission belt.

[0002]

2. Description of the Related Art In recent years, the ambient temperature around the engine room of an automobile has risen as compared with the conventional one, against the backdrop of social demands for energy saving and compactness. Along with this, the operating environment temperature of the transmission belt has also risen. Conventionally, natural rubber, styrene-butadiene rubber, and chloroprene rubber have been mainly used for power transmission belts, but in a high temperature atmosphere, a problem occurs that cracks occur early in the cured compressed rubber layer.

For such an early breaking phenomenon of the belt,
Although improvement of heat resistance of chloroprene rubber has been studied in the past, recently, instead of this, ethylene-α-olefin elastomer such as ethylene-propylene rubber (EPR) or ethylene-propylene-diene copolymer rubber (EPDM). Is a relatively inexpensive polymer having excellent heat resistance and cold resistance, and its use in a transmission belt is under consideration, and is disclosed in, for example, JP-A-6-345948.

However, the ethylene-propylene rubber has a low tearing power, and when a peroxide cross-linking system is used, the tearing power is further lowered, and the core wire tends to pop out during running. On the other hand, in the case of using the sulfur cross-linking system, it is difficult to sufficiently raise the vulcanization degree, and therefore the wear is increased during running. Especially, in the V-ribbed belt, wear debris is accumulated at the bottom portion between the rib portions, resulting in adhesive wear. It was easy to cause, and this was a big problem that caused pronunciation. Further, when EPDM having an extremely large amount of double bonds in the molecule is used to increase the degree of vulcanization, adhesive wear can be improved to some extent, but heat resistance is deteriorated.

A further problem is a method of adhering the ethylene-α-olefin elastomer and the fiber cord. Specifically, the fiber material is resorcin-formalin-
After immersing in a dip solution containing styrene-butadiene-vinyl pyridine latex, vulcanization adhesion with EPDM rubber composition (JP-A-8-113657), and adhesion with resorcin-formalin-rubber latex adhesive solution Attempts have been made to vulcanize and bond the treated fiber material to an EPDM rubber composition containing a methylene donor, a methylene acceptor and a silicic acid compound (JP-A-8-113656).

[0006]

[Problems to be Solved by the Invention] However, resorcin-
When treated with a dip solution containing formalin-styrene-butadiene-vinylpyridine latex, even if the adhesive strength is improved, when it is used in a region such as the core of a power transmission belt, which is subject to repeated bending fatigue, In some cases, the core wire and the adhesive rubber layer were separated at an early stage.

Even when an EPDM rubber composition blended with a methylene donor, a methylene acceptor and a silicic acid compound is used, when it is used in a region which is repeatedly subjected to repeated bending fatigue, the core wire and the adhesive rubber layer are quickly formed. It may peel off.

In consideration of these points, the present invention is capable of favorably adhering an ethylene / α-olefin rubber composition to a fiber cord or a woven fabric such as a cover canvas which is a core of a transmission belt. An object of the present invention is to provide an adhesive between an α-olefin rubber composition and a fiber, and a transmission belt using the adhesive for an adhesive rubber layer.

[0009]

[Means for Solving the Problems] That is, the invention according to claim 1 of the present application provides an adhesive of an ethylene / α-olefin rubber composition and a fiber, wherein the fiber is an ethylene-α-olefin-diene copolymer rubber. Ethylene / α-adhesively vulcanized with an unvulcanized rubber composition of ethylene / α-olefin rubber after adhesion treatment with an RFL treatment liquid in which a vulcanization accelerator was added to a resorcin-formalin-rubber latex liquid consisting of latex. It exists in the adhesive between the olefin rubber composition and the fiber, and the vulcanization adhesive force between the fiber and the ethylene / α-olefin rubber composition can be increased by adding a vulcanization accelerator to the RFL treatment liquid.

The invention according to claim 2 of the present application is the ethylene / α
In an adhesive of an olefin rubber composition and a fiber, the fiber is subjected to an adhesion treatment with a pre-dip treatment liquid containing an isocyanate compound and / or an epoxy compound, and then resorcin consisting of an ethylene-α-olefin-diene copolymer rubber latex. -Formalin-Ethylene / α-olefin rubber composition adhered and vulcanized with an unvulcanized rubber composition of ethylene / α-olefin rubber after adhesion treatment with an RFL treatment liquid in which a vulcanization accelerator is added to a rubber latex liquid It is in the adhesive between the fiber and.

The invention according to claim 3 of the present application is the ethylene-α
-Rubber paste obtained by applying an adhesion treatment with an RFL treatment liquid prepared by adding a vulcanization accelerator to a resorcinol-formalin-rubber latex liquid consisting of an olefin-diene copolymer rubber latex, and further dissolving an ethylene / α-olefin rubber composition in a solvent. Of the ethylene / α-olefin rubber unvulcanized rubber composition and ethylene
It is an adhesive of an α-olefin rubber composition and a fiber.

In the invention according to claim 4 of the present application, the RFL treatment liquid is an adhesive between an ethylene / α-olefin rubber composition containing a vulcanizing agent and a vulcanization accelerator and a fiber. The vulcanization adhesive force between the fiber and the ethylene / α-olefin rubber composition can be increased by adding the agent and the vulcanization accelerator.

The invention according to claim 5 of the present application is a compression rubber comprising an adhesive rubber layer in which a fiber cord is embedded in an ethylene / α-olefin rubber composition along a belt length direction, and an ethylene / α-olefin rubber composition. It is a transmission belt composed of layers, and it can be expected that the initial adhesive strength of the belt and the residual adhesive strength of the belt are improved and the running life of the belt is extended.

According to the sixth aspect of the present invention, an adhesive rubber layer in which a transmission belt has a fiber cord embedded in an ethylene / α-olefin rubber composition along a belt length direction, and an ethylene / α-olefin rubber composition. Is a V-ribbed belt in which a plurality of rib portions extending in the belt length direction are laminated.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Ethylene.α-used in the present invention
As olefin rubber, ethylene and α-olefin (propylene, butene, hexene, or octene)
Or a copolymer of ethylene, the above α-olefin and a non-conjugated diene, and specifically, ethylene-propylene rubber (EPM) or ethylene-propylene-
A rubber composed of a diene terpolymer (EPDM).
The diene component has 5 carbon atoms such as ethylidene norbornene, dicyclopentadiene, 1,4-hexadiene, cyclooctadiene and methylene norbornene.
-15 non-conjugated dienes are included.

Sulfur or organic peroxide is used for crosslinking the rubber. Examples of the organic peroxide include dicumyl peroxide, di-t-butyl peroxide, t-
Butyl cumyl peroxide, benzoyl peroxide, 1,3-bis (t-butylperoxyisopropyl) benzene, 2,5-dimethyl-2,5-di (t-butylperoxy) hexyne-3,2,5- Dimethyl
2,5- (benzoylperoxy) hexane, 2,5-
Examples thereof include dimethyl-2,5-mono (t-butylperoxy) hexane. This organic peroxide, alone or as a mixture, is usually 0.005 to 0.02 per 100 g of ethylene-α-olefin elastomer.
Used in the molar range.

By adding a co-agent, the degree of crosslinking can be increased and problems such as adhesive wear can be prevented. Examples of the crosslinking aid include TIAC, TAC, 1,2 polybutadiene, unsaturated carboxylic acid metal salts, oximes, guanidine, trimethylolpropane trimethacrylate, ethylene glycol dimethacrylate, NN′-m- Phenylene bismaleimide, sulfur, etc. are usually used for peroxide crosslinking.

In addition to the above, conventional rubbers such as carbon black, reinforcing agents such as silica, fillers such as calcium carbonate and talc, plasticizers, stabilizers, processing aids, and colorants may be added as required. What is used in the formulation is used.

The fibers used in the present invention are aramid fibers,
It is a polyester fiber such as polyethylene terephthalate fiber (PET fiber) and polyethylene naphthalate fiber (PEN fiber), and a cord or a woven fabric as its form is used.

The fibers used are treated by the following three methods. (A) After the fibers are adhered to the resorcin-formalin-rubber latex liquid consisting of an ethylene-α-olefin-diene copolymer rubber latex with an RFL treatment liquid containing a vulcanization accelerator, an ethylene / α-olefin rubber Closely vulcanize with the unvulcanized rubber composition. This RFL processing liquid contains
A vulcanizing agent may be added.

(B) The fiber is an isocyanate compound or /
And a pretreatment liquid containing an epoxy compound, and an adhesion treatment with the RFL treatment liquid, followed by adhesion vulcanization with an unvulcanized rubber composition of ethylene / α-olefin rubber.

(C) The fiber is an isocyanate compound or /
And an adhesion treatment with a pretreatment liquid consisting of an epoxy compound, and an adhesion treatment with an RFL treatment liquid obtained by adding a vulcanization accelerator to a resorcinol-formalin-rubber latex liquid consisting of an ethylene-α-olefin-diene copolymer rubber latex, Further, 5 to 30% by mass of rubber paste prepared by dissolving an ethylene / α-olefin rubber composition in a solvent or the RFL treatment liquid is used.
The solution containing the carbon black of 1. is overcoated.

In this case, the temperature of the treating solution is adjusted to 5 to 40 ° C., the dipping time is 0.5 to 30 seconds, and 200 to
It is heat-treated by passing through an oven adjusted to 250 ° C. for 1 to 3 minutes.

The RFL solution is a mixture of an initial condensate of resorcin and formalin with a rubber latex of ethylene-α-olefin-diene copolymer, in which case the molar ratio of resorcin and formalin is 1: 2 to 2: 1. It is suitable to increase the adhesive strength. If the molar ratio is less than 1/2, the three-dimensional reaction of the resorcin-formalin resin proceeds too much to cause gelation. On the other hand, if it exceeds 2/1, the reaction between resorcin and formalin does not proceed so much, and the adhesive strength decreases. To do. Then, a vulcanization accelerator or a vulcanization accelerator and a vulcanizing agent are added to the RFL liquid.

Typical examples of the ethylene-α-olefin-diene copolymer rubber latex include ethylene-propylene-diene monomer latex rubber, and examples of the diene monomer include dicyclopentadiene, methylene norbornene and ethylidene norbornene. ,
Examples include 1,4-hexadiene and cyclooctadiene.

As a method for producing the rubber latex,
There are the following two types, one is a method in which a solid polymer is dissolved in a solvent and then phase-changed to emulsify and disperse in water to form a latex. Is the method. Although the ethylene-propylene-diene monomer latex produced by the former method is used in Examples described later, it may be produced by any method.

The mass ratio of the solid content of the resorcin-formalin initial condensate to the rubber latex is 1: 2 to 1: 1.
8 is preferable, and maintaining this range is suitable for increasing the adhesive strength. When the above ratio is less than 1/2, the resin content of resorcin-formalin is large, the RFL film becomes hard and the dynamic adhesion is poor, and when it exceeds 1/8, the resin content of resorcin-formalin is high. As a result, the RFL film becomes soft and the adhesive strength is reduced.

Further, the vulcanization accelerator added to the RFL solution is a sulfur-containing vulcanization accelerator, and specifically, 2-mercaptobenzothiazole (M) and salts thereof (eg, zinc salt, sodium salt, Cyclohexylamine salt, etc.) Thiazoles such as dibenzothiazyl disulfide (DM), N
-Sulfenamides such as cyclohexyl-2-benzothiazyl sulfenamide (CZ), thiurams such as tetramethylthiuram monosulfide (TS), tetramethylthiuram disulfide (TT) and dipentamethylenethiuram tetrasulfide (TRA) And dithiocarbamate salts such as sodium di-n-butyldithiocarbamate (TP), zinc dimethyldithiocarbamate (PZ) and zinc diethyldimethyldithiocarbamate (EZ). As the vulcanizing agent, there are sulfur, metal oxides (zinc oxide, magnesium oxide, lead oxide), peroxides and the like, which are used in combination with the above vulcanization accelerator.

The vulcanization accelerator is ethylene-α of RFL liquid.
-Olefin-diene copolymer rubber latex is 1 to 20 relative to 100 parts by mass of solid content, and the vulcanizing agent is 1 to 1
0 parts by weight are used.

In the pre-treatment, untreated fibers are immersed in a treatment liquid which is set at room temperature with an isocyanate compound and / or an epoxy resin for 0.5 to 30 seconds, and then 150 to 190.
It is dried by passing through an oven adjusted to ℃ for 2 to 5 minutes.

The isocyanate compound used in this pretreatment liquid is, for example, 4,4'-diphenylmethane diisocyanate, tolylene 2,4-diisocyanate, polymethylene polyphenyl diisocyanate, hexamethylene diisocyanate, polyaryl polyisocyanate (for example, as a trade name. There is PAPI) etc. This isocyanate compound is also used as a mixture with an organic solvent such as toluene or methyl ethyl ketone.

Blocked polyisocyanates obtained by blocking the isocyanate groups of polyisocyanates by reacting the above isocyanate compounds with blocking agents such as phenols, tertiary alcohols and secondary alcohols can also be used. .

The epoxy compound used in the pretreatment liquid is, for example, a reaction product of a polyhydric alcohol such as ethylene glycol, glycerin and pentaerythritol, a polyalkylene glycol such as polyethylene glycol and a halogen-containing epoxy compound such as epichlorohydrin. Or resorcin, bis (4-hydroxyphenyl) dimethylmethane, phenol. Formaldehyde resin, resorcin. It is a reaction product with a polyhydric phenol such as formaldehyde resin or a halogen-containing epoxy compound. The epoxy compound is used as a mixture with an organic solvent such as toluene or methyl ethyl ketone.

In the overcoat process, ethylene / α-
A liquid containing 5 to 30% by mass of carbon black in an RFL liquid composed of a rubber paste obtained by dissolving an olefin rubber composition in a solvent or an ethylene-α-olefin-diene copolymer rubber latex is used. As a result, ethylene / α-
The adhesive force between the olefin rubber composition and the fiber is improved.

As the application of the fiber subjected to the above-mentioned adhesion treatment, for example, it is used for the core wire of the V-ribbed belt shown in FIG. According to this V-ribbed belt 1, the core wire 2 made of a high-strength and low-elongation cord made of the twisted cord in the adhesive rubber layer 3 is embedded in the adhesive rubber layer 3, and an elastic layer is formed below the core wire 2. It has a certain compressed rubber layer 4. The compressed rubber layer 4 is provided with a plurality of ribs 7 extending in the longitudinal direction of the belt and having a substantially triangular cross section. The canvas 5 with rubber may be provided on the belt surface, but it is not necessary to provide it.

The rubber composition used for the compressed rubber layer 4 is 1 to 50 parts by mass, preferably 1 to 50 parts by mass, of short fibers such as aramid, nylon, polyester, vinylon and cotton with respect to 100 parts by mass of ethylene / α-olefin rubber. 5 to 25 parts by mass may be contained.

On the other hand, the adhesive rubber layer 3 is made of the above-mentioned ethylene / α-olefin rubber composition which can be crosslinked with sulfur in order to have heat resistance and to improve the adhesion to the core wire. To do. In addition, if necessary, used in usual rubber compounding such as carbon black, reinforcing agent such as silica, filler such as calcium carbonate and talc, plasticizer, stabilizer, processing aid, coloring agent. Stuff used.

The amount of sulfur added to the adhesive rubber layer 3 is 0.5 to 3.0 parts by mass with respect to 100 parts by mass of the ethylene / α-olefin rubber.

Of the ethylene / α-olefin rubbers used for the adhesive rubber layer 3, EPDM has an iodine value of 4
When it is less than 40 and less than 4, crosslinking of the rubber composition with sulfur is not sufficient, and a problem of core wire pop-out occurs. On the other hand, when it exceeds 40, the scorch of the rubber composition is shortened to make it difficult to handle, and the heat resistance is deteriorated.

An example of the method of manufacturing the V-ribbed belt is as follows. First, one to a plurality of cover canvases and an adhesive rubber layer are wound around the peripheral surface of a cylindrical molding drum, and then a cord made of a rope is spirally spun on this, and a compression rubber layer is sequentially wound. After being attached to obtain a laminated body, this is crosslinked with sulfur or organic peroxide to obtain a crosslinked sleeve.

Next, the bridging sleeve is hung on the driving roll and the driven roll to run under a predetermined tension, and the further rotated grinding wheel is moved so as to come into contact with the running bridging sleeve to compress the bridging sleeve. 3 to 100 on the rubber layer surface
The plurality of groove portions are individually polished.

The bridging sleeve thus obtained is removed from the driving roll and the driven roll, the bridging sleeve is hung on the other driving roll and the driven roll to run, and is cut into a predetermined width by a cutter to be individually cut. Finish with V-ribbed belt.

In addition to the V-ribbed belt described above, the present invention also includes a V-belt 21 in which a canvas 22 with rubber is attached only to the upper and lower surfaces of the belt as shown in FIG. The V-belt 21 has a core wire 23 embedded in an adhesive rubber layer 24, and has a compression rubber layer 26 which is an elastic layer below the core rubber 23. Cogs may be provided on the compressed rubber layer 26 at predetermined intervals along the longitudinal direction.

[0044]

EXAMPLES The present invention will now be described in more detail with reference to examples. Examples 1 to 4, Comparative Example 1 1220 dtex / 1 × 5 untreated twisted yarn cord of polyethylene terephthalate (PET) was prepared, immersed in the pre-dip solution shown in Table 1, and then heat treated at 180 ° C. for 4 minutes. Next, it was immersed in the RFL solution shown in Table 2 and heat-treated at 230 ° C. for 2 minutes. Furthermore, it was immersed in an overcoat treatment liquid and heat-treated at 150 ° C. for 4 minutes. The overcoat treatment liquid was prepared by dissolving the compounded rubber of Table 3 in toluene. The obtained cords are arranged in a width of 25 mm on a rubber sheet having a composition shown in Table 4 and a thickness of 4 mm, a pressure of 0.2 MPa is applied by a press plate, vulcanization is performed at 163 ° C. for 30 minutes, and a peel test is performed. A sample was prepared. And JISK
The flat peel force was measured according to 6256. The results are shown in Table 5.

The obtained treated cord was used as a core wire, a rubber compound shown in Table 4 was used as an adhesive rubber layer, and a rubber compound shown in Table 4 was added as a compression rubber layer to which 20 parts by mass of nylon cut yarn was added. Then, two plies of rubber-coated cotton canvas and an adhesive rubber layer are laminated on the peripheral surface of a cylindrical molding drum, the core wire is pinned with a pitch of 1.03 mm and a tension of 50 N, and then a compression rubber layer is laminated. The article was vulcanized. While the vulcanization sleeve is hung on the drive roll and the driven roll and run under a predetermined tension, the rotating grinding wheel is applied to the surface of the compressed rubber layer to grind a plurality of grooved parts, and then to a predetermined width. It was cut to obtain a V-ribbed belt.

The obtained V-ribbed belt is a K-shaped 3-ribbed belt having a length of 975 mm according to the RMA standard, and has a rib pitch of 3.56 mm, a rib height of 2.0 mm, a belt thickness of 4.3 mm and a rib angle of 40 °. The initial adhesive force of the obtained belt and the residual adhesive force of the belt after running were determined by the following methods. The results are also shown in Table 5.

(1) Initial adhesive strength of the belt: Two core wires embedded in the circumferential direction of the belt are raised to 50 m.
It is the stress when peeling at a speed of m / min. (2) Belt residual adhesive force Belt is driven pulley (diameter 120 mm), driven pulley (diameter 120 mm), tension pulley (diameter 45 m)
It was hung on each pulley of m). The bending angle of the belt on the tension pulley is about 90 ° C. The ambient temperature is 100 ° C., the rotation speed of the drive pulley is 4900 rpm, the load of the driven pulley is 8.8 kW, and the tension pulley is 83
After running the belt for 100 hours with an initial tension of 4N, two core wires embedded in the belt circumferential direction were struck.
It is the stress when peeling at a speed of 0 mm / min.

[0048]

[Table 1]

[0049]

[Table 2]

[0050]

[Table 3]

[0051]

[Table 4]

[0052]

[Table 5]

As a result, by adding the vulcanization accelerator to the RFL liquid, the flat peeling force between the cord and the rubber, the belt initial adhesive force, and the belt residual adhesive force are improved, and the belt running life is prolonged. Can be expected.

Examples 5 to 8 The core wire treatment was performed by using the RFL solution shown in Table 6 in the same procedure as in Example 1. The obtained cords were arranged in a width of 25 mm and press-vulcanized with the compounded rubber shown in Table 4, and the peeling force was measured.
The results are shown in Table 7. Further, a V-ribbed belt was produced in the same manner as in Example 1, and the adhesive force when two cords were caused from the belt was measured. The results are shown in Table 7.

[0055]

[Table 6]

[0056]

[Table 7]

As a result, by adding a vulcanizing agent and a vulcanization accelerator to the RFL liquid, it is expected that the adhesive strength will be increased, the initial adhesive strength of the belt and the residual adhesive strength of the belt will be improved, and the belt running life will be extended.

[0058]

As described above, in the invention described in the claims of the present application, the fiber is mixed with a resorcin-formalin-rubber latex liquid comprising an ethylene-α-olefin-diene copolymer rubber latex and a vulcanization accelerator or a vulcanizing agent. After adhesion treatment with an RFL treatment liquid containing a vulcanization accelerator, ethylene
It is in an adhesive between an unvulcanized rubber composition of an α-olefin rubber and an ethylene / α-olefin rubber composition that has been adhesion-vulcanized, and a fiber. By adding a vulcanization accelerator to the RFL treatment liquid, the fiber and the ethylene -It is possible to increase the vulcanization adhesive strength with the α-olefin rubber composition. Also, a transmission belt comprising an adhesive rubber layer in which a fiber cord is embedded in an ethylene / α-olefin rubber composition along the length direction of the belt, and a compression rubber layer comprising the ethylene / α-olefin rubber composition. The initial adhesive strength and the residual adhesive strength of the belt are improved, and the belt running life is extended.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a V-ribbed belt.

FIG. 2 is a sectional view of a V-belt.

[Explanation of symbols]

1 V ribbed belt 2 cores 3 Adhesive rubber layer 4 Compressed rubber layer 5 Rubber canvas 7 ribs

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F16G 1/08 F16G 1/08 A 5/06 5/06 A F term (reference) 4L033 AA07 AA08 AB03 AB05 AC11 AC15 BA08 BA23 BA69 CA34 CA49 CA50 CA68

Claims (6)

[Claims] 1. An adhesive between an ethylene / α-olefin rubber composition and a fiber, wherein the fiber is a vulcanization accelerator in a resorcin-formalin-rubber latex liquid comprising an ethylene-α-olefin-diene copolymer rubber latex. After the adhesion treatment with the RFL treatment liquid containing ethylene,
An adhesive product of an ethylene / α-olefin rubber composition and a fiber, which is obtained by closely vulcanizing with an unvulcanized rubber composition of an olefin rubber. 2. In an adhesive of an ethylene / α-olefin rubber composition and a fiber, the fiber is applied with a pre-dip treatment liquid containing an isocyanate compound and / or an epoxy compound, and then ethylene-α-olefin-
R in which a vulcanization accelerator was added to a resorcin-formalin-rubber latex liquid composed of a diene copolymer rubber latex
An adhesion product of an ethylene / α-olefin rubber composition and a fiber, which has been adhered and vulcanized with an unvulcanized rubber composition of an ethylene / α-olefin rubber after adhesion treatment with a FL treatment liquid. 3. A resorcin-formalin-containing ethylene-α-olefin-diene copolymer rubber latex.
After adhesion treatment with an RFL treatment liquid in which a vulcanization accelerator is added to a rubber latex liquid, and further overcoating with a rubber paste obtained by dissolving an ethylene / α-olefin rubber composition in a solvent, an untreated ethylene / α-olefin rubber is removed. Ethylene according to claim 1 or 2, which has been adhered and vulcanized with a vulcanized rubber composition.
An adhesive product of an α-olefin rubber composition and a fiber. 4. The ethylene / α- according to claim 1, wherein the RFL treatment liquid contains a vulcanizing agent and a vulcanization accelerator.
Adhesive of olefin rubber composition and fiber. 5. A transmission belt comprising an adhesive rubber layer having a fiber cord embedded in an ethylene / α-olefin rubber composition along the length direction of the belt, and a compression rubber layer made of the ethylene / α-olefin rubber composition. A transmission belt, wherein the adhesive rubber layer comprises the adhesive according to any one of claims 1 to 4. 6. An adhesive rubber layer in which a transmission belt has a fiber cord embedded in an ethylene / α-olefin rubber composition along the belt length direction, and a belt made of the ethylene / α-olefin rubber composition in the belt length direction. The transmission belt according to claim 5, which is a V-ribbed belt in which a plurality of extending rib portions are laminated.