JP2002179231A - Rubber composition for belt of belt conveyer, and belt, and belt conveyer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rubber composition for a belt of a belt conveyer having improved abrasion resistance, a belt using the rubber composition, and a belt conveyer having the belt. SOLUTION: This rubber composition for the belt of the belt conveyer is produced by mixing a friction reducing agent made of (B) acid amide and/or silicone oil into (A) rubber component, the belt uses the rubber composition, and the belt is mounted to the belt conveyer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber composition for a belt of a belt conveyor, a belt using the composition, and a belt conveyor equipped with the belt, and more particularly to an upper cover rubber, a reinforcing material, and a lower cover. TECHNICAL FIELD The present invention relates to a rubber composition for a belt of a belt conveyor with improved friction resistance, a belt using the composition, and a belt conveyor to which the belt is attached, particularly for a belt upper cover rubber of a belt of a belt conveyor made of rubber. .

[0002]

BACKGROUND OF THE INVENTION Belt conveyors are extremely useful as a means of transporting articles and are used in many places. The belt of this belt conveyor is usually made of an upper cover rubber, a reinforcing material, and a lower cover rubber. In particular, the upper cover rubber is easily worn due to friction with a mounted transported object, and controls the life of the entire belt. Therefore, it is necessary to improve the wear resistance life of the rubber. Conventionally, the wear resistance life has been improved by blending various polymers and carbon into the rubber, but a sufficient improvement has not been obtained. The present invention relates to a rubber composition for a belt of a belt conveyor having an improved abrasion life and suitable for use as a top cover rubber of the conveyor belt, a belt using the composition, and a belt conveyor equipped with the belt. It is intended to provide.

[0003]

Means for Solving the Problems As a result of intensive studies, the present inventors have solved the above-mentioned problems by adding a friction reducing agent composed of an acid amide and / or a silicone oil to a rubber component. The present inventors have found that a rubber composition for a belt of a belt conveyor having an improved life can be obtained, and arrived at the present invention.

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION The rubber component (A) in the rubber composition of the present invention is a natural rubber (NR).
Or synthetic rubber. As the synthetic rubber, for example, butadiene rubber (BR), isoprene rubber, styrene-butadiene rubber (SBR), butyl rubber, and halogenated butyl rubber are preferable. copolymer with p-halogenated methylstyrene), ethylene-propylene-diene rubber (EPDM)
Etc. can also be mentioned as suitable. The rubber component in the present invention is used by appropriately selecting one or more from natural rubber and the above-described synthetic rubber according to the use of the belt of the belt conveyor.

[0005] The friction reducing agent in the rubber composition means a substance which, when blended with the rubber, precipitates on the surface of the vulcanized rubber to reduce friction with the transported material.
In the rubber composition of the present invention, a friction modifier comprising an acid amide and / or silicone oil is used. As the acid amide, a monoamide type of a higher fatty acid, for example, oxystearoamide, erucylamide, methylolamide, laurylamide, palmitylamide, pehenamide, stearamide (stearamide), oleic amide (oleylamide), and a bisamide type of higher fatty acid E.g., methylene pistearamide, ethylene bis stearamide, ethylene pisoleylamide, ethylene pislaurilamide, complex amide type such as stearyl oleyl amide, N-stearyl erucamide, N-oleyl palmitamide and special resin acids Amides of saturated or unsaturated fatty acids such as amides are suitable. Suitable silicone oils include polyalkylsiloxanes, particularly polydimethylsiloxane and modified products thereof, and polymeterphenylsiloxane and modified products thereof. Particularly, TSF451 series manufactured by Toshiba Silicone Co., Ltd. is preferable.

The amount of the friction reducing agent varies depending on the kind and the required abrasion resistance and cannot be determined unconditionally, but is 0.1 to 15 parts by weight, preferably 0.5 to 5 parts by weight per 100 parts by weight of the rubber component. Used in a range of parts. In particular, in the case of oleic acid amide, 0.1 parts by weight per 100 parts by weight of the rubber component is used.
The range is suitably from 10 to 10 parts by weight, preferably from 0.5 to 3 parts by weight.
0.1 to 15 parts by weight, preferably 1 to 5 parts by weight per 0 parts by weight
A suitable range is 0.5 to 7 parts by weight, preferably 1 to 4 parts by weight, per 100 parts by weight of the rubber component. If it is less than these ranges, the desired effect cannot be obtained, and if it exceeds this range, a problem may occur in factory workability (moldability).

[0007] The rubber composition of the present invention usually contains sulfur. The content of this sulfur is the same as that of component (A) 1
The range of 0.3 to 5 parts by weight per 00 parts by weight is preferred. If the content is less than 0.3 parts by weight, a sufficient vulcanizing effect cannot be obtained, and the target performance cannot be achieved. If the amount exceeds 5 parts by weight, the rubber becomes brittle and the fatigue performance of the rubber is unfavorably reduced.

Further, in addition to the above components, a compounding agent usually used in the rubber industry can be appropriately compounded in the rubber composition of the present invention in a usual compounding amount. Specifically, fillers such as carbon black and silica, softeners such as aroma oil, guanidines such as diphenylguanidine, thiazoles such as mercaptobenzothiazole, N, N′-dicyclohexyl-2-benzothiazolylsulfen Vulcanization accelerators such as sulfenamides such as amides, thiurams such as tetramethylthiuram disulfide, vulcanization accelerators such as zinc oxide, poly (2,2,4-trimethyl-1,
Antioxidants such as amines such as 2-dihydroquinoline) and phenyl-α-naphthylamine.

As described above, the belt of the belt conveyor is usually made of an upper cover rubber, a reinforcing material and a lower cover rubber, and the upper cover rubber comes in contact with the transported object. The belt for the belt conveyor of the present invention, the upper cover rubber, the reinforcing material and the belt comprising the lower cover rubber,
The top cover rubber uses the rubber composition of the present invention. As the reinforcing material and the lower cover rubber, those conventionally known for this type of belt can be used, but, of course, the use of the rubber composition of the present invention for the lower cover rubber does not impede. The belt of the belt conveyor of the present invention can be used for any conventionally known belt conveyor. Thus, the belt conveyor of the present invention is one in which the belt for the belt conveyor of the present invention is mounted as a conventionally known belt conveyor belt.

[0010]

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

Comparative Example 100 parts by weight of a rubber component consisting of 80% by weight of natural rubber and 20% by weight of BR are 45 parts by weight of carbon black (trade name: ASAHI # 70-NP , manufactured by Asahi Carbon Co., Ltd.) and 3 parts by weight of stearic acid. , 3.5 parts by weight of zinc white, wax 2
Parts by weight, antioxidant 2,2,4-trimethyl-1,2-
0.2 parts by weight of dihydroquinoline polymer [manufactured by Seiko Co., Ltd., trade name: Nonflex RD], antioxidant (6C) N
-(1,3-dimethylbutyl) -N'-phenyl-p-
3 parts by weight of phenylenediamine [manufactured by Ouchi Shinko Chemical Co., Ltd., trade name: Nocrack 6C], 2 parts by weight of aroma oil, 1.4 parts by weight of sulfur, and a vulcanization accelerator N-tertbutyl-2
1.6 parts of -benzothiazyl-1-sulfenamide [manufactured by Ouchi Shinko Chemical Co., Ltd., trade name: Noxeller NS] was blended to prepare a rubber composition.

Examples 1 to 11 In addition to the composition of Comparative Example 1, the amount of a friction reducing agent [oleic acid amide (trade name: Diamid O-200, manufactured by Nippon Kasei Co., Ltd.), stearic acid amide] shown in Table 1 (Trade name: Amide AP-1 manufactured by Nippon Kasei Co., Ltd.) and / or polyalkylsiloxane (trade name: TSF manufactured by Toshiba Silicone Co., Ltd.)
451-10M)] to prepare a rubber composition.

The rubber compositions prepared in Comparative Example 1 and Examples 1 to 11 were subjected to an abrasion resistance test using a DIN abrasion tester, and the results are shown in Table 1. (The abrasion resistance test was performed at room temperature and expressed as an index relative to the control.)

[0014]

[Table 1]

[0015]

[Table 2]

[0016]

[Table 3]

[0017]

Industrial Applicability The rubber composition for a belt of a belt conveyor of the present invention and a belt using the same have excellent abrasion resistance, and the belt conveyor equipped with the belt has less damage and dirt due to friction. is there.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3F024 AA03 CA08 CB03 CB06 CB13 4J002 AC011 AC031 AC061 AC081 BB151 BB181 BB241 CP032 EP016 EP026 FD010 FD020 FD030 FD140 FD150 FD172 FD176 GM01

Claims (9)

[Claims] 1. A rubber composition for a belt of a belt conveyor, comprising a rubber component blended with a friction reducing agent comprising an acid amide and / or silicone oil. 2. The rubber composition for a belt of a belt conveyor according to claim 1, wherein the acid amide is oleic amide. 3. The rubber composition for a belt of a belt conveyor according to claim 1, wherein the acid amide is stearic acid amide. 4. The rubber composition for a belt of a belt conveyor according to claim 2, wherein the compounding amount of the oleic acid amide is 0.1 to 10 parts by weight per 100 parts by weight of the rubber component. 5. The rubber composition for a belt of a belt conveyor according to claim 3, wherein the amount of stearic acid amide is 0.1 to 15 parts by weight per 100 parts by weight of the rubber component. 6. The rubber composition for a belt of a belt conveyor according to claim 1, wherein the silicone oil is a polyalkylsiloxane. 7. The rubber composition for a belt of a belt conveyor according to claim 6, wherein the compounding amount of the polyalkylsiloxane is 0.5 to 7 parts by weight per 100 parts by weight of the rubber component. 8. A belt for a belt conveyor, wherein the rubber composition according to claim 1 is used as an upper cover rubber of a belt comprising an upper cover rubber, a reinforcing material and a lower cover rubber. . 9. A belt conveyor equipped with the belt according to claim 8.