CN110546084B - Fiber-reinforced layer for conveyor belt and conveyor belt - Google Patents
Fiber-reinforced layer for conveyor belt and conveyor belt Download PDFInfo
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- CN110546084B CN110546084B CN201880026506.6A CN201880026506A CN110546084B CN 110546084 B CN110546084 B CN 110546084B CN 201880026506 A CN201880026506 A CN 201880026506A CN 110546084 B CN110546084 B CN 110546084B
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- 229920001971 elastomer Polymers 0.000 claims abstract description 80
- 239000005060 rubber Substances 0.000 claims abstract description 80
- 239000000835 fiber Substances 0.000 claims abstract description 41
- 239000000853 adhesive Substances 0.000 claims abstract description 16
- 230000001070 adhesive effect Effects 0.000 claims abstract description 16
- 238000004073 vulcanization Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 15
- 239000004952 Polyamide Substances 0.000 claims description 6
- 229920002647 polyamide Polymers 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 8
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 95
- 238000012360 testing method Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 229920002302 Nylon 6,6 Polymers 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/30—Belts or like endless load-carriers
- B65G15/32—Belts or like endless load-carriers made of rubber or plastics
- B65G15/34—Belts or like endless load-carriers made of rubber or plastics with reinforcing layers, e.g. of fabric
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D1/00—Woven fabrics designed to make specified articles
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Belt Conveyors (AREA)
- Woven Fabrics (AREA)
Abstract
The invention provides a fiber reinforced layer and a conveyor belt, which can improve the adhesiveness between rubber and a fiber reinforced layer when peeling the rubber and the fiber reinforced layer in the belt width direction. A fiber reinforcement layer 3 having a woven structure in which warp yarns 4 extend in a belt length direction and weft yarns 5 extend in a belt width direction is embedded in a conveyor belt 1 as a core 2, the ratio A1/A2 of an exposed area A1 of the warp yarns 4 to an exposed area A2 of the weft yarns 5 is 3.0 or more and 5.0 or less in a plan view of the fiber reinforcement layer 3, and when annular processing is performed, a rubber component R is appropriately left on the surface of the fiber reinforcement layer 3 by peeling off a covering rubber 6 in a belt width direction at each belt length direction end 1a, and vulcanization is performed with a vulcanization adhesive 7 or the like interposed between the remaining rubber components R, whereby the belt length direction ends 1a are joined to each other.
Description
Technical Field
The present invention relates to a fiber-reinforced belt for a conveyor belt and a conveyor belt, and more particularly, to a fiber-reinforced belt for a conveyor belt and a conveyor belt capable of improving the adhesion between rubber and a fiber-reinforced layer when peeling the rubber and the fiber-reinforced layer in the width direction of the conveyor belt.
Background
When the belt-like conveyor is looped, so-called endless processing (endless processing) is performed. In the ring-like processing, the covering rubber is removed at each belt longitudinal direction end portion to be joined. In a belt using a fiber-reinforced layer as a core, a slight amount of rubber component (such as an adhesive rubber for bonding a cover rubber and a fiber-reinforced layer) remains on the surface of each fiber-reinforced layer during endless processing, and the remaining rubber components are sandwiched between a vulcanization adhesive or the like to perform vulcanization, thereby joining the ends in the belt longitudinal direction to each other (for example, see patent document 1).
When the cover rubber laminated and joined to the fiber-reinforced layer is removed, a gap is added to the cover rubber, and the cover rubber is peeled from the fiber-reinforced layer with the gap as a starting point. In the case of peeling the coating rubber in the longitudinal direction of the belt (hereinafter referred to as the belt longitudinal direction) in the endless process, there is no problem, but in the case of peeling in the width direction of the belt (hereinafter referred to as the belt width direction), the amount of the rubber component remaining on the surface of the fiber-reinforced layer from which the coating rubber is peeled may be too small or none at all in the specification of the belt over-vulcanized or the like. When the residual amount of the rubber component is too small, the belt longitudinal direction end portions cannot be firmly joined to each other, and when the rubber component is not left, the belt longitudinal direction end portions cannot be joined to each other.
The inventors of the present application investigated the cause that no rubber component remains on the surface of the fiber-reinforced layer when the cover rubber is peeled off in the belt width direction, and studied various methods for eliminating the cause, thereby completing the present invention.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2014-37280
Disclosure of Invention
Problems to be solved by the invention
The invention aims to provide a fiber reinforced layer for a conveyor belt and a conveyor belt, which can improve the adhesiveness between rubber and the fiber reinforced layer when peeling the rubber and the fiber reinforced layer in the belt width direction.
Technical scheme
In order to achieve the above object, a fiber-reinforced belt layer according to the present invention has a woven structure in which warp yarns extend in a belt length direction and weft yarns extend in a belt width direction, and is characterized in that a ratio a1/a2 of an exposed area a1 of the warp yarns to an exposed area a2 of the weft yarns is 3.0 or more and 5.0 or less in a plan view of the fiber-reinforced belt layer.
The conveyor belt of the present invention is characterized in that the fiber-reinforced layer for a conveyor belt is embedded as at least the uppermost layer and the lowermost layer of the core.
Advantageous effects
According to the present invention, the ratio a1/a2 of the exposed area a1 of the warp yarns to the exposed area a2 of the weft yarns is lower than that of the conventional yarns in a plan view of the fiber-reinforced layer, and is set to be 3.0 or more and 5.0 or less. By setting the ratio a1/a2 lower than the conventional one, when the rubber and the fiber-reinforced layer are peeled off in the belt width direction, the filaments constituting the warp yarn are hardly stretched and opened by the rubber. Accordingly, the breakage of the filament portion of the warp is suppressed, and the adhesive layer attached to the surface of the fiber-reinforced layer is hardly separated from the warp. Therefore, the adhesion between the rubber and the fiber-reinforced layer can be improved as compared with the conventional rubber.
When the rubber is peeled in the belt longitudinal direction, the ratio a1/a2 is 3.0 or more, and therefore, the filaments constituting the weft yarn are not stretched by the rubber and are not excessively opened. Therefore, the rubber component can be appropriately left on the surface of the fiber-reinforced layer regardless of the direction in which the rubber is peeled off. Therefore, the belt longitudinal direction end portions can be firmly joined to each other by performing vulcanization with a vulcanization adhesive or the like interposed between the remaining rubber components at the respective belt longitudinal direction end portions.
Drawings
Fig. 1 is a cross-sectional view showing, by way of example, a conveyor belt in which a fiber-reinforced layer for a conveyor belt according to the present invention is embedded.
Fig. 2 is an explanatory view illustrating the conveyor belt of fig. 1 from a top view.
Fig. 3 is an explanatory view showing, by way of example, a state in which the conveyor belt of fig. 1 is stretched between pulleys.
Fig. 4 is an X-X sectional view of fig. 3.
Fig. 5 is an explanatory view of the fiber-reinforced layer of fig. 1 enlarged and exemplarily shown in a top view.
Fig. 6 is an explanatory view illustrating a process of peeling off the cover rubber of fig. 1 in a cross-sectional view.
Fig. 7 is an explanatory view showing, by way of example, a process of joining fiber-reinforced layers having rubber components remaining on the surfaces thereof when viewed in a cross-sectional side view.
Fig. 8 is an explanatory view showing a state where the fiber-reinforced layers of fig. 7 are joined to each other by way of example when viewed in a cross-sectional side view.
Fig. 9 is an explanatory view schematically illustrating a state of the fiber-reinforced layer in a plan view enlarged in the step of peeling the covering rubber.
Fig. 10 is an explanatory view of another embodiment of the fiber-reinforced layer enlarged and schematically illustrated in a top view.
Detailed Description
Hereinafter, a fiber-reinforced layer for a conveyor belt and a conveyor belt according to the present invention will be described based on embodiments shown in the drawings.
In the conveyor belt 1 of the present invention illustrated in fig. 1 and 2, a fiber-reinforced layer 3 for a conveyor belt of the present invention (hereinafter, referred to as a fiber-reinforced layer 3) is embedded as a core 2. The core 2 is a member that receives tension generated in the belt 1 placed in tension. An adhesive rubber is adhered to the surface of the fiber-reinforced layer 3, and cover rubbers 6 are disposed respectively above and below the core body 2. The core 2 and the covering rubber 6 are integrated by vulcanization adhesion. The core body 2 is continuous in the belt length direction, and the width direction dimension is slightly smaller than the belt width. Thus, both ends in the width direction of the conveyor belt 1 become the lug glue without the core 2. In the figure, arrow L indicates the belt longitudinal direction (the longitudinal direction of the conveyor belt 1), and arrow W indicates the belt width direction (the width direction of the conveyor belt 1).
The belt 1, in which the longitudinal direction end portions are joined to each other to form an endless loop, is used by being stretched between pulleys 8a and 8b as shown by way of example in fig. 3 and 4. Then, on the conveying side where the conveyed material 10 is carried and conveyed, both ends in the belt width direction support the lower surface by the support rollers 9 whose rotation axes are inclined at a predetermined angle a with respect to the horizontal, and the center portion in the belt width direction supports the lower surface by the support rollers 9 whose rotation axes are horizontal. Thereby, the belt width direction both end portions are bent upward with respect to the belt width direction central portion, and the conveyor belt 1 is used in a groove-like manner. When the belt is bent around the pulleys 8a and 8b, the maximum tensile stress is generated in the fiber-reinforced layer 3 disposed on the outermost periphery of the endless belt 1, and the maximum compressive stress is generated in the fiber-reinforced layer 3 disposed on the innermost periphery.
In this embodiment, the core 2 has a structure in which four fiber-reinforced layers 3 of the present invention are stacked. The core 2 is not limited to a four-layer structure, and may be a single-layer structure or another multilayer structure.
As shown by way of example in fig. 5, the fiber reinforcement layer 3 has a plain weave structure in which the warp yarns 4 extend in the belt length direction, the weft yarns 5 extend in the belt width direction, and every other warp yarn 4 and every other weft yarn 5 are interlaced up and down. The fiber reinforcing layer 3 is embedded with the extending direction of the warp 4 as the belt length direction.
The warp 4 uses a multifilament yarn formed by twisting a plurality of filaments. The weft yarn 5 is a multifilament yarn or a monofilament yarn formed by twisting one filament. The warp yarns 4 and the weft yarns 5 may be made of the same material or different materials. For example, polyester fibers are used for the warp yarns 4, and polyamide fibers are used for the weft yarns 5. Examples of the polyamide fiber include nylon 6 and nylon 66.
One feature of the present invention is that the ratio a1/a2 of the exposed area a1 of the warp yarns 4 to the exposed area a2 of the weft yarns 5 is 3.0 to 5.0 in a plan view of the fiber-reinforced layer 3. The exposed area a1 of the warp yarn 4 is an area excluding a portion covered with the weft yarn 5 and not visible in a plan view. The exposed area a2 of the weft yarn 5 is an area excluding a portion covered with the warp yarn 4 and not visible in a plan view. In fig. 5, the area of the exposed area a1 is indicated by a diagonal line of a one-dot chain line, and the area of the exposed area a2 is indicated by a diagonal line of a broken line.
In the fiber-reinforced layer, it is important to sufficiently ensure the strength in the belt longitudinal direction. Therefore, the warp yarns are generally thicker than the weft yarns, and the ratio A1/A2 is, for example, 5.3 or more. On the other hand, the fiber-reinforced layer 3 of the present invention has a smaller ratio A1/A2 than the conventional one. That is, the exposed area a1 of the warp yarn 4 in the present invention is smaller than that of the conventional fiber reinforced layer.
When the belt 1 is formed into an endless shape, the longitudinal direction end portions 1a of the belt-shaped belt 1 are joined to each other by endless processing. In the ring processing, a gap is added to the covering rubber 6, and the covering rubber 6 is peeled from the fiber-reinforced layer 3 with the gap as a starting point. The covering rubber 6 is peeled off in the belt width direction as exemplified in fig. 6.
In the case where the core 2 is formed of a plurality of fiber reinforced layers 3, the covering rubber 6 is removed and the fiber reinforced layers 3 are stepped at each longitudinal end 1a as shown by way of example in fig. 7. One of the laminated fiber-reinforced layers 3 is peeled off in the belt width direction from the other fiber-reinforced layer 3. In this peeling operation, the adhesive rubber of the fiber reinforced layers 3 to each other and the fiber reinforced layers 3 are peeled off in the belt width direction. Some rubber component R (bonding rubber or the like) remains on the surface of the fiber-reinforced layer 3 after the peeling operation.
Next, as shown by way of example in fig. 8, a vulcanization adhesive 7 is applied to the surface of the remaining rubber component R at each belt longitudinal direction end portion 1 a. Then, the opposing surfaces of the laminated fiber-reinforced layers 3 are joined to each other by vulcanization in a state where the vulcanization adhesive 7 or the like is interposed between the rubber components R. Thereby, the belt longitudinal direction end portions 1a are joined to each other to form the endless belt conveyor 1.
When the above-described peeling operation is performed, a peeling force f acts on the warp 4 as exemplified in fig. 9. Therefore, the filaments 4a constituting the warp 4 are widened by the peeling force f, and the filaments 4a are opened. The extending direction of the weft yarns 5 is substantially orthogonal to the extending direction of the warp yarns 4. Therefore, even if the peeling force f acts on the weft yarn 5, the filaments 5a constituting the weft yarn 5 are not opened like the filaments 4a constituting the warp yarn 4.
The inventors of the present application have found that the filaments 4a are in an open state, whereby the filaments 4a are easily broken in part, and the adhesive layer adhering to the filaments 4a integrally adheres to the peeled cover rubber 6 side, which is one cause of the difficulty in leaving the rubber component R on the surface of the fiber-reinforced layer 3. Therefore, based on this finding, in the fiber-reinforced layer 3 of the present invention, the above-mentioned ratio a1/a2 is smaller than the conventional one and is set to 5.0 or less.
By reducing the ratio a1/a2, the area of warp yarn 4 on which the peeling force f directly acts is reduced. Therefore, even if the same peeling force f is applied, the filaments 4a of the warp 4 are hardly opened, and the rubber component R tends to remain on the surface of the fiber-reinforced layer 3. As a result, even in the case where the rubber is peeled off in the belt width direction, the stacked fiber-reinforced layers 3 can be firmly joined to each other, and even the long-dimension-direction end portions 1a can be firmly joined to each other.
When the ratio a1/a2 is less than 3.0, when the rubber is peeled in the belt longitudinal direction, the filaments 5a are easily opened due to the peeling force at this time when the weft yarns 5 are multifilament yarns. As a result, the rubber component R hardly remains on the surface of the fiber-reinforced layer 3. Therefore, in the present invention, the ratio A1/A2 is set to 3.0 or more and 5.0 or less.
The invention is a solution which is beneficial to the following problems: a new problem that has occurred when peeling off rubber such as the covering rubber 6 in the belt width direction, that is, a problem that has not been noticed in the past when performing the annular processing. In addition, when the rubber is peeled in the belt longitudinal direction, a sufficient amount of the rubber component R remains on the surface of the fiber-reinforced layer 3 after the peeling operation in the case of peeling in a direction inclined with respect to the belt longitudinal direction, and the longitudinal direction end portions 1a can be firmly joined to each other.
To reduce the ratio a1/a2, specifically, the following options exist: thinning the warp yarn 4 (making the fineness F1 of the warp yarn 4 smaller); the arrangement density of the warp yarns 4 is reduced; thickening the weft yarn 5 (increasing the fineness F2 of the weft yarn 5); increase the arrangement density of the weft yarns 5, and the like. When the warp 4 is made too thin or the arrangement density of the warp 4 is made too small, there arises a problem that it is difficult to secure the strength of the fiber reinforced layer 3 in the belt longitudinal direction. On the other hand, when the weft 5 is made too thick or the arrangement density of the warp 4 is made too small, the crimp ratio (the degree of vertical bending) of the warp 4 increases. Accordingly, the belt 1 stretched in tension has a problem that the elongation rate with time becomes large, and the belt 1 tends to meander. Therefore, the fineness F1 and the arrangement density of the warp yarns 4 and the fineness F2 and the arrangement density of the weft yarns 5 are set within appropriate ranges according to the use conditions of the conveyor belt 1.
Therefore, the ratio F1/F2 of the fineness F1 of the warp yarn 4 to the fineness F2 of the weft yarn 5 is preferably 1.5 or more and 2.5 or less. When the ratio F1/F2 is less than 1.5, the crimp ratio of the warp yarn 4 tends to become excessively large, and when the ratio F1/F2 exceeds 2.5, the exposed area a1 of the warp yarn 4 tends to become excessively large.
The twist multiplier T1 of the weft yarn 5 calculated by the following expression (1) is preferably 20 or more and 50 or less.
Twist multiplier T1 ═ T/10 (D)1/2……(1)
T in the formula (1) is the number of twists per 10cm of the weft yarn 5, and D is the fineness dtex of the weft yarn 5.
At a twist multiplier T1 of less than 20, it is advantageous to reduce the exposed area a1 of the warp yarns 4, while it is disadvantageous to reduce the exposed area a2 of the weft yarns 5, and is also disadvantageous to ensure sufficient fatigue resistance of the weft yarns 5. At twist multiplier T1 exceeding 50, it is disadvantageous to reduce the exposed area a1 of the warp yarns 4.
The twist direction of the warp yarns 4 and the weft yarns 5 may be S direction (clockwise twist) or Z direction (counterclockwise twist), and it is preferable that the warp yarns 4 having opposite twist directions are alternately arranged in every one or every two or more pieces in the belt width direction as shown in fig. 10 by way of example. By alternately weaving the S-direction twisted warp yarns 4 and the Z-direction twisted warp yarns 4 in the belt width direction, even if the filaments 4a of one half of the warp yarns 4 of the fiber reinforcing layer 3 are easily opened when the covering rubber 6 is peeled in the belt width direction, the filaments 4a of the other half of the warp yarns 4 are twisted. Therefore, even when the cover rubber 6 is peeled off from one side in the belt width direction or peeled off from the other side in the belt width direction, the rubber component R is likely to remain on the surface of the fiber-reinforced layer 3 to a moderate degree. Therefore, by adopting the specification in which the warp yarns 4 twisted in the S direction and the warp yarns 4 twisted in the Z direction are alternately woven in the belt width direction, directionality of adhesion to the rubber and the fiber reinforcing layer 3 can be eliminated.
Compared with polyester fibers, polyamide fibers have better adhesion to rubber. Thus, the use of polyester fibers for the warp yarns 4 and polyamide fibers for the weft yarns 5 contributes to further improvement in adhesion between the rubber and the fiber-reinforced layer 3 when the rubber is peeled off in the belt width direction.
In the case where the core 2 has a structure in which a plurality of fiber reinforced layers are stacked, all of the fiber reinforced layers may be the fiber reinforced layer 3 of the present invention, but in order to control the cost, only a part of the fiber reinforced layers may be the fiber reinforced layer 3 of the present invention, and the remaining fiber reinforced layers may be inexpensive and general-purpose fiber reinforced layers. In this case, the fiber-reinforced layer 3 of the present invention is disposed as the outermost layer most susceptible to the thermal influence caused by vulcanization at the time of manufacturing the conveyor belt 1.
That is, the belt conveyor 1 before being formed into an endless shape is set to the following specifications: of the fiber-reinforced layers constituting the core 2, at least the uppermost layer and the lowermost layer are formed of the fiber-reinforced layer 3 of the present invention. Of course, the following specifications may be set: only the uppermost layer and the lowermost layer are made to employ the fiber-reinforced layer 3 of the present invention. By setting such a specification, the effect of the fiber-reinforced layer 3 can be obtained efficiently while minimizing the amount of the fiber-reinforced layer 3 to be used.
Examples
As a sample of the fiber reinforced layer, 7 kinds of specifications (conventional example, comparative example, examples 1 to 5) shown in table 1 were produced. In addition, samples of the conveyor belt were made using samples of the individual fiber reinforced layers. In Table 1, PET refers to polyester and N66 refers to nylon 66. In table 1, a1 denotes the exposed area of the warp, a2 denotes the exposed area of the weft, F1 denotes the fineness of the warp, and F2 denotes the fineness of the weft. In the samples of the respective belts, only the fiber-reinforced layer as the core was different in specification, and the other specifications were the same. Two fiber reinforced layers were embedded in each sample of the conveyor belt.
The following measurements of the belt length change rate and the warp strength utilization rate were performed for each conveyor sample. Further, the following peel test (adhesion of the fiber-reinforced layer to the rubber) was performed on each sample of the fiber-reinforced layer. The results are shown in Table 1.
[ Table 1]
[ Belt Length Change ratio ]
Under the same conditions, samples of the respective conveyor belts were placed under tension between pulleys, and running tests were performed under the same conditions to measure the rate of change in the circumferential length of the samples before and after running. The rate of change was evaluated as an index based on the conventional example of 100, and a smaller value of the index means that the increase in the circumferential length with time is suppressed and the rate of change is more excellent.
[ strength utilization of warp ]
The strength utilization factor F of the warp yarn calculated by the following expression (2) was grasped for each sample of the belt before running.
Strength utilization factor F ═ breaking strength in the extending direction of the warp yarns per unit width of the fiber-reinforced layer/(tensile breaking strength of one warp yarn x number of warp yarns per unit width of the fiber-reinforced layer)) × 100% … … (2)
The strength utilization factor F is an index indicating to what extent the tensile strength originally possessed by the warp yarn in the fiber-reinforced layer can be exhibited, and a larger value of F means that the strength of the warp yarn is efficiently exhibited without waste, and is more excellent. In table 1, evaluation is performed using an index in which the strength utilization rate of the conventional example is set as reference 100, and a larger numerical value of the index means better.
[ peeling test ]
Using a sample of each fiber-reinforced layer, according to JIS K6256-1: 2013 "peel strength with cloth" test pieces were manufactured. The test piece was integrated by sandwiching each sample between an adhesive rubber (NR weight ratio of 50%) and a covering rubber (NBR weight ratio of 20% and SBR weight ratio of 40%) and vulcanizing the sample. Then, the reaction was carried out in accordance with JIS K6256-1: 2013 "peel strength with cloth", the sample and the adhesive rubber were peeled off, and the area of the adhesive rubber remaining on the joint surface of the sample and the adhesive rubber was measured. The direction of peeling the sample was performed using both the belt length direction (extending direction of warp) and the belt width direction (extending direction of weft). That is, only the fiber-reinforced layer was different for each test piece, and the test conditions were the same. The area of the residual adhesive rubber was evaluated by an index based on the conventional example of 100, and a larger numerical value of the index means that the residual amount of the adhesive rubber is more excellent.
As is clear from the results in table 1, in examples 1 to 5, the rate of change with time of the belt length, the fatigue resistance, and the strength utilization rate of the warp yarn had performances equivalent to those of the conventional example, and when the rubber and the fiber-reinforced layer were peeled off in the belt width direction, much more rubber remained in the fiber-reinforced layer than in the conventional example.
Description of the symbols
1 conveyor belt
1a longitudinal end
2 core body
3 fiber reinforced layer
4 warp yarn
4a filament
5 weft yarn
5a filament
6 coating rubber
7 vulcanization adhesive
8a, 8b pulley
9 supporting roller
10 conveying article
R rubber component
Claims (8)
1. A method of joining conveyor belts having a woven structure in which warp yarns are embedded and extend in a belt length direction and weft yarns extend in a belt width direction, the method being characterized in that the method comprises the steps of,
the ratio A1/A2 of the exposed area A1 of the warp yarns to the exposed area A2 of the weft yarns is 3.0 to 5.0 in a top view of the fiber-reinforced layer,
the method for manufacturing the belt comprises the steps of peeling off and removing a cover rubber from the fiber-reinforced layer in a belt width direction at one end portion and the other end portion in a longitudinal direction of the conveyor belt, leaving a rubber component on surfaces of the fiber-reinforced layer at the one end portion and the other end portion after peeling off the cover rubber, and laminating and vulcanizing the fiber-reinforced layers with a vulcanization adhesive interposed therebetween, thereby joining facing surfaces of the fiber-reinforced layers to each other and joining the one end portion and the other end portion.
2. The joining method of a conveyor belt according to claim 1,
the ratio F1/F2 of the fineness F1 of the warp yarn to the fineness F2 of the weft yarn is set to be 1.5 to 2.5.
3. The joining method of a conveyor belt according to claim 1,
the twist factor T1 of the weft yarn calculated by the following formula (1) is set to be more than 20 and less than 50,
twist multiplier T1 ═ T/10 (D)1/2……(1)
Here, T is the number of twists per 10cm of the weft yarn, and D is the fineness of the weft yarn in dtex.
4. The joining method of a conveyor belt according to claim 2,
the twist factor T1 of the weft yarn calculated by the following formula (1) is set to be more than 20 and less than 50,
twist multiplier T1 ═ T/10 (D)1/2……(1)
Here, T is the number of twists per 10cm of the weft yarn, and D is the fineness of the weft yarn in dtex.
5. The joining method of a conveyor belt according to any one of claims 1 to 4,
the warp yarns twisted in the S direction and the warp yarns twisted in the Z direction are alternately arranged in the belt width direction.
6. The joining method of a conveyor belt according to any one of claims 1 to 4,
the warp yarns are made of polyester fibers, and the weft yarns are made of polyamide fibers.
7. The joining method of a conveyor belt according to claim 5,
the warp yarns are made of polyester fibers, and the weft yarns are made of polyamide fibers.
8. A method of joining conveyor belts, wherein,
the fiber-reinforced belt according to any one of claims 1 to 7, which is embedded as at least an uppermost layer and a lowermost layer of the core.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-114837 | 2017-06-12 | ||
| JP2017114837A JP7059523B2 (en) | 2017-06-12 | 2017-06-12 | Conveyor belt joining method |
| PCT/JP2018/011347 WO2018230072A1 (en) | 2017-06-12 | 2018-03-22 | Fiber-reinforced layer for conveyer belts and conveyer belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110546084A CN110546084A (en) | 2019-12-06 |
| CN110546084B true CN110546084B (en) | 2021-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880026506.6A Active CN110546084B (en) | 2017-06-12 | 2018-03-22 | Fiber-reinforced layer for conveyor belt and conveyor belt |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7059523B2 (en) |
| CN (1) | CN110546084B (en) |
| AU (1) | AU2018284627B2 (en) |
| WO (1) | WO2018230072A1 (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11246018A (en) * | 1998-03-06 | 1999-09-14 | Yokohama Rubber Co Ltd:The | Conveyer belt |
| JP2001063811A (en) * | 1999-08-31 | 2001-03-13 | Mitsuboshi Belting Ltd | Resin belt |
| CN102144063A (en) * | 2008-07-03 | 2011-08-03 | 沃依特专利有限责任公司 | Structured forming fabric, papermaking machine and method |
| JP2011195301A (en) * | 2010-03-19 | 2011-10-06 | Yokohama Rubber Co Ltd:The | Method of manufacturing fiber-reinforced layer for conveyor belt and fiber-reinforced layer for conveyor belt |
| JP2014094836A (en) * | 2009-07-07 | 2014-05-22 | Mitsubishi Heavy Industries Printing & Packaging Machinery Ltd | Heat-resistant laminated conveyor belt |
| JP2014201853A (en) * | 2013-04-05 | 2014-10-27 | 横浜ゴム株式会社 | Fiber reinforced layer for conveyor belt |
| CN104603034A (en) * | 2012-08-10 | 2015-05-06 | 横滨橡胶株式会社 | Method for joining conveyor belt |
| JP2017036111A (en) * | 2015-08-07 | 2017-02-16 | ニッタ株式会社 | Conveyance belt for optical inspection |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH058821A (en) * | 1991-09-21 | 1993-01-19 | Bridgestone Corp | Conveyor belt hardly causing friction and snaking movement |
| JP3433700B2 (en) * | 1999-05-31 | 2003-08-04 | 東海ゴム工業株式会社 | Conveyor belt and joining method thereof |
-
2017
- 2017-06-12 JP JP2017114837A patent/JP7059523B2/en active Active
-
2018
- 2018-03-22 WO PCT/JP2018/011347 patent/WO2018230072A1/en active Application Filing
- 2018-03-22 AU AU2018284627A patent/AU2018284627B2/en active Active
- 2018-03-22 CN CN201880026506.6A patent/CN110546084B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11246018A (en) * | 1998-03-06 | 1999-09-14 | Yokohama Rubber Co Ltd:The | Conveyer belt |
| JP2001063811A (en) * | 1999-08-31 | 2001-03-13 | Mitsuboshi Belting Ltd | Resin belt |
| CN102144063A (en) * | 2008-07-03 | 2011-08-03 | 沃依特专利有限责任公司 | Structured forming fabric, papermaking machine and method |
| JP2014094836A (en) * | 2009-07-07 | 2014-05-22 | Mitsubishi Heavy Industries Printing & Packaging Machinery Ltd | Heat-resistant laminated conveyor belt |
| JP2011195301A (en) * | 2010-03-19 | 2011-10-06 | Yokohama Rubber Co Ltd:The | Method of manufacturing fiber-reinforced layer for conveyor belt and fiber-reinforced layer for conveyor belt |
| CN104603034A (en) * | 2012-08-10 | 2015-05-06 | 横滨橡胶株式会社 | Method for joining conveyor belt |
| JP2014201853A (en) * | 2013-04-05 | 2014-10-27 | 横浜ゴム株式会社 | Fiber reinforced layer for conveyor belt |
| JP2017036111A (en) * | 2015-08-07 | 2017-02-16 | ニッタ株式会社 | Conveyance belt for optical inspection |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2018284627B2 (en) | 2021-04-08 |
| AU2018284627A1 (en) | 2020-01-16 |
| JP2019001553A (en) | 2019-01-10 |
| CN110546084A (en) | 2019-12-06 |
| WO2018230072A1 (en) | 2018-12-20 |
| JP7059523B2 (en) | 2022-04-26 |
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Address after: Kanagawa Prefecture, Japan Patentee after: THE YOKOHAMA RUBBER Co.,Ltd. Country or region after: Japan Address before: Tokyo, Japan Patentee before: THE YOKOHAMA RUBBER Co.,Ltd. Country or region before: Japan |