Polyarylate fabric integral belt core for coal mine conveying belt

Abstract

The invention discloses an integral polyarylate fabric belt core for a coal mine conveying belt. The integral polyarylate fabric belt core is of a 4-5-layer integral woven structure composed of liquid crystal polyarylate fibers, nylon fibers and cotton fibers. According to the polyarylate fabric integral belt core stress line, polyarylate fibers are adopted, the strength is high, the belt body is thin, the weight is light, the weight of a finished belt is about 50% of that of a steel wire rope core conveying belt with the same strength, energy consumption in the running process of the conveying belt can be greatly reduced, polyarylate is lower than aramid fibers in price, bending fatigue resistance is good, and the service life of the conveying belt is prolonged. And the whole belt core weaving structure can be fully impregnated with flame-retardant adhesive cement, the whole belt core subjected to impregnation and plasticization has excellent flame-retardant performance, and compared with an aramid fiber canvas core flame-retardant conveying belt with the same strength, the aramid fiber canvas core flame-retardant conveying belt has better safety and economic performance.

Description

Technical Field

[0001] The invention belongs to the technical field of conveyor belts, and in particular relates to a polyarylate fabric integral belt core for a coal mine conveyor belt. Background Art

[0002] The fabric whole core flame retardant conveyor belt for coal mines is the main tool for transporting coal underground in coal mines. In the prior art, the fabric whole core flame retardant conveyor belt has good flame retardant performance, low production cost, mechanical joints, convenient maintenance and replacement, and is the safest to use. However, since the fabric whole belt core of the prior art is subjected to force using polyester or nylon fibers, the strength is relatively low.

[0003] MT / T914 "Textile Core Flame Retardant Conveyor Belts for Coal Mines" limits the maximum tensile strength to below 3400N / mm. Flame retardant conveyor belts above 3400N / mm can only be made of steel cord core flame retardant conveyor belts or aramid canvas core flame retardant conveyor belts. Steel cord core flame retardant conveyor belts have high strength, but the vulcanization joint takes a long time, the quality is difficult to control, and they are prone to longitudinal tearing. Therefore, joint pull-off and longitudinal tearing accidents often occur. At the same time, steel cord core flame retardant conveyor belts cannot be melted when ignited, which will cause a larger fire. There have been many fire accidents of steel cord core conveyor belts in coal mines; aramid canvas core flame retardant conveyor belts have high strength, but the vulcanization joint takes a long time, the quality is difficult to control, and they are prone to longitudinal tearing. Therefore, joint pull-off and longitudinal tearing accidents often occur. At the same time, steel cord core flame retardant conveyor belts cannot be melted when ignited, which will cause a larger fire. There have been many fire accidents of steel cord core conveyor belts in coal mines; Compared with steel cord flame-retardant conveyor belts with the same strength, aramid canvas core flame-retardant conveyor belts are thin and light in weight, which can reduce the energy consumption of conveyors. However, due to the high price of aramid fiber and poor bending fatigue resistance, the strength decays rapidly during use, and the flame-retardant performance is not good after stripping the covering layer. When used for transporting coal underground in coal mines, the cost is high, the strength loss is large, and there are certain safety risks. In addition, the aramid canvas core flame-retardant conveyor belts of MT / T914 standard can only use vulcanized joints, which are complicated to operate and take a long time to construct. When used as a chute belt, frequent joints will affect production.

[0004] Patent CN106697727A discloses an integral belt core for a conveyor belt. The intermediate woven layer is woven with aramid as the warp and twisted yarn as the weft, thereby improving the poor adhesion between aramid fiber and the covering adhesive and avoiding the peeling of the covering layer and the belt core. The obtained integral belt core has a low cotton content, a light belt body, and high strength, thereby improving the comprehensive performance of the conveyor belt, avoiding the delamination of the conveyor belt, and having a long service life. However, the integral belt core obtained by this solution is expensive and has poor bending fatigue resistance, and cannot meet the demand for high-strength conveyor belts. Summary of the invention

[0005] The purpose of the present invention is to provide a polyarylate fabric integral belt core for a coal mine conveyor belt to meet the use requirements of a high-strength fabric integral core flame-retardant conveyor belt.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] The utility model relates to a polyarylate fabric integral belt core for a coal mine conveyor belt, which has a 4-5-layer integral braided structure composed of liquid crystal polyarylate fibers, nylon fibers and cotton fibers.

[0008] The width of the overall belt core of the polyarylate fabric for coal mine conveyor belt is 104-106% of the nominal width of the conveyor belt.

[0009] Furthermore, the warp force lines of the entire belt core are made of liquid crystal polyarylate fibers.

[0010] Furthermore, the liquid crystal polyarylate fiber is formed by plying 1000D or 1500D high-strength liquid crystal polyarylate fibers, and the tensile strength of a single fiber after plying is 1500-3500N, and the density is 184-279 fibers / 10cm.

[0011] Furthermore, the upper and lower layers of warp threads of the integral belt core are cotton fibers, and the middle 2-3 layers of warp threads are liquid crystal polyarylate fibers.

[0012] Furthermore, the warp cotton content of the entire belt core is 15-25%.

[0013] Furthermore, the weft force lines of the entire belt core are made of nylon fibers.

[0014] Furthermore, the nylon fiber is formed by plying 1000D or 1500D nylon fiber and cotton fiber, and the tensile strength of a single warp thread after plying is 450-1250N / thread, and the density is 124-160 threads / 10cm.

[0015] Furthermore, the overall weft cotton content of the core is 35-45%.

[0016] Beneficial effects of the present invention:

[0017] (1) The polyarylate fabric integral belt core of the present invention adopts polyarylate fiber as the force bearing line, which has high strength, thin belt body and light weight. The weight of the finished belt is about 50% of that of the steel cord core conveyor belt with the same strength, which can greatly reduce the energy consumption during the operation of the conveyor belt. Polyarylate is cheaper than aramid and has good bending fatigue resistance. The integral belt core braided structure can be fully impregnated with flame retardant glue. The integral belt core after impregnation and plasticization has excellent flame retardant performance. Compared with the flame retardant conveyor belt with aramid canvas core of the same strength, it has better safety and economic performance.

[0018] (2) The tensile strength of the fabric whole core flame retardant conveyor belt produced by the present invention reaches 7500N / mm, which can completely replace the aramid canvas core flame retardant conveyor belt and the steel wire rope core flame retardant conveyor belt, and has better safety and economic performance than the aramid canvas core flame retardant conveyor belt and the steel wire rope core flame retardant conveyor belt.

[0019] (3) The present invention is used to produce high-strength fabric whole-core flame-retardant conveyor belts, which can be vulcanized or mechanically joined. Mechanical joints can be used to quickly install or replace the conveyor belt, reducing production downtime. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1: A polyarylate fabric integral belt core for a coal mine conveyor belt, comprising a four-layer integral woven structure consisting of liquid crystal polyarylate fibers, nylon fibers and cotton fibers.

[0022] The width of the overall belt core of the polyarylate fabric for coal mine conveyor belt is 1059mm.

[0023] The warp force lines of the overall belt core are made of liquid crystal polyarylate fibers.

[0024] The liquid crystal polyarylate fiber is formed by plying 1000D high-strength liquid crystal polyarylate fibers. The tensile strength of a single fiber after plying is 1500N and the density is 184 fibers / 10cm.

[0025] The upper and lower layers of warp threads of the integral belt core are cotton fibers, and the middle two layers of warp threads are liquid crystal polyarylate fibers.

[0026] The overall warp cotton content of the core is 25%.

[0027] The overall belt core weft force line is made of nylon fiber.

[0028] Nylon fiber is made of 1000D nylon fiber and cotton fiber. After plying, the tensile strength of a single warp thread is 450N / thread and the density is 160 threads / 10cm.

[0029] The overall weft cotton content of the core is 45%.

[0030] Example 2: A polyarylate fabric integral belt core for a coal mine conveyor belt, comprising a four-layer integral woven structure consisting of liquid crystal polyarylate fibers, nylon fibers and cotton fibers.

[0031] The width of the overall belt core of the polyarylate fabric for coal mine conveyor belt is 1057mm.

[0032] The warp force lines of the overall belt core are made of liquid crystal polyarylate fibers.

[0033] The liquid crystal polyarylate fiber is formed by plying 1000D high-strength liquid crystal polyarylate fibers. The tensile strength of a single fiber after plying is 1500N and the density is 205 fibers / 10cm.

[0034] The upper and lower layers of warp threads of the integral belt core are cotton fibers, and the middle two layers of warp threads are liquid crystal polyarylate fibers.

[0035] The overall belt core has a cotton content of 25% in the warp direction.

[0036] The overall belt core weft force line is made of nylon fiber.

[0037] Nylon fiber is made of 1000D nylon fiber and cotton fiber. After plying, the tensile strength of a single warp thread is 500N / thread and the density is 152 threads / 10cm.

[0038] The overall weft cotton content of the core is 44%.

[0039] Example 3: A polyarylate fabric integral belt core for a coal mine conveyor belt, comprising a four-layer integral woven structure consisting of liquid crystal polyarylate fibers, nylon fibers and cotton fibers.

[0040] The width of the overall belt core of the polyarylate fabric for coal mine conveyor belt is 1055mm.

[0041] The warp force lines of the overall belt core are made of liquid crystal polyarylate fibers.

[0042] The liquid crystal polyarylate fiber is formed by plying 1000D high-strength liquid crystal polyarylate fibers. The tensile strength of a single fiber after plying is 1500N and the density is 228 fibers / 10cm.

[0043] The upper and lower layers of warp threads of the integral belt core are cotton fibers, and the middle two layers of warp threads are liquid crystal polyarylate fibers.

[0044] The overall belt core has a cotton content of 25% in the warp direction.

[0045] The overall belt core weft force line is made of nylon fiber.

[0046] Nylon fiber is made by plying 1000D nylon fiber and cotton fiber. After plying, the tensile strength of a single warp thread is 600N / thread and the density is 140 threads / 10cm.

[0047] The overall weft cotton content of the core is 43%.

[0048] Example 4: A polyarylate fabric integral belt core for a coal mine conveyor belt, comprising a four-layer integral woven structure consisting of liquid crystal polyarylate fibers, nylon fibers and cotton fibers.

[0049] The width of the overall belt core of the polyarylate fabric for coal mine conveyor belt is 1272mm.

[0050] The warp force lines of the overall belt core are made of liquid crystal polyarylate fibers.

[0051] The liquid crystal polyarylate fiber is formed by plying 1000D high-strength liquid crystal polyarylate fibers. The tensile strength of a single fiber after plying is 2000N, and the density is 187 fibers / 10cm.

[0052] The upper and lower layers of warp threads of the integral belt core are cotton fibers, and the middle two layers of warp threads are liquid crystal polyarylate fibers.

[0053] The overall warp cotton content of the core is 23%.

[0054] The overall belt core weft force line is made of nylon fiber.

[0055] Nylon fiber is made of 1000D nylon fiber and cotton fiber. After plying, the tensile strength of a single warp thread is 600N / thread and the density is 150 threads / 10cm.

[0056] The overall weft cotton content of the core is 43%.

[0057] Example 5: A polyarylate fabric integral belt core for a coal mine conveyor belt, comprising a four-layer integral woven structure consisting of liquid crystal polyarylate fibers, nylon fibers and cotton fibers.

[0058] The width of the overall belt core of the polyarylate fabric for coal mine conveyor belt is 1270mm.

[0059] The warp force lines of the overall belt core are made of liquid crystal polyarylate fibers.

[0060] The liquid crystal polyarylate fiber is formed by plying 1000D high-strength liquid crystal polyarylate fibers. The tensile strength of a single fiber after plying is 2000N, and the density is 220 fibers / 10cm.

[0061] The upper and lower layers of warp threads of the integral belt core are cotton fibers, and the middle two layers of warp threads are liquid crystal polyarylate fibers.

[0062] The overall warp cotton content of the core is 23%.

[0063] The overall belt core weft force line is made of nylon fiber.

[0064] Nylon fiber is made of 1000D nylon fiber and cotton fiber. After plying, the tensile strength of a single warp thread is 750N / thread and the density is 145 threads / 10cm.

[0065] The overall weft cotton content of the core is 40%.

[0066] Example 6: A polyarylate fabric integral belt core for a coal mine conveyor belt, comprising a four-layer integral woven structure consisting of liquid crystal polyarylate fibers, nylon fibers and cotton fibers.

[0067] The width of the overall belt core of the polyarylate fabric for coal mine conveyor belt is 1268mm.

[0068] The warp force lines of the overall belt core are made of liquid crystal polyarylate fibers.

[0069] The liquid crystal polyarylate fiber is formed by plying 1000D high-strength liquid crystal polyarylate fibers. The tensile strength of a single fiber after plying is 2000N, and the density is 245 fibers / 10cm.

[0070] The upper and lower layers of warp threads of the integral belt core are cotton fibers, and the middle two layers of warp threads are liquid crystal polyarylate fibers.

[0071] The overall warp cotton content of the core is 23%.

[0072] The overall belt core weft force line is made of nylon fiber.

[0073] Nylon fiber is made of 1000D nylon fiber and cotton fiber. After plying, the tensile strength of a single warp thread is 750N / thread and the density is 157 threads / 10cm.

[0074] The overall weft cotton content of the core is 40%.

[0075] Example 7: A polyarylate fabric integral belt core for a coal mine conveyor belt, comprising a five-layer integral woven structure consisting of liquid crystal polyarylate fibers, nylon fibers and cotton fibers.

[0076] The width of the overall belt core of the polyarylate fabric for coal mine conveyor belt is 1470mm.

[0077] The warp force lines of the overall belt core are made of liquid crystal polyarylate fibers.

[0078] The liquid crystal polyarylate fiber is formed by plying 1500D high-strength liquid crystal polyarylate fibers. The tensile strength of a single fiber after plying is 2500N, and the density is 220 fibers / 10cm.

[0079] The upper and lower layers of warp threads of the integral belt core are cotton fibers, and the middle three layers of warp threads are liquid crystal polyarylate fibers.

[0080] The overall warp cotton content of the core is 20%.

[0081] The overall belt core weft force line is made of nylon fiber.

[0082] Nylon fiber is made by plying 1500D nylon fiber and cotton fiber. After plying, the tensile strength of a single warp thread is 850N / thread and the density is 142 threads / 10cm.

[0083] The overall weft cotton content of the core is 38%.

[0084] Example 8: A polyarylate fabric integral belt core for a coal mine conveyor belt, comprising a five-layer integral woven structure consisting of liquid crystal polyarylate fibers, nylon fibers and cotton fibers.

[0085] The width of the overall belt core of the polyarylate fabric for coal mine conveyor belt is 1470mm.

[0086] The warp force lines of the overall belt core are made of liquid crystal polyarylate fibers.

[0087] The liquid crystal polyarylate fiber is formed by plying 1500D high-strength liquid crystal polyarylate fibers. The tensile strength of a single fiber after plying is 2500N and the density is 238 fibers / 10cm.

[0088] The upper and lower layers of warp threads of the integral belt core are cotton fibers, and the middle three layers of warp threads are liquid crystal polyarylate fibers.

[0089] The overall warp cotton content of the core is 20%.

[0090] The overall belt core weft force line is made of nylon fiber.

[0091] Nylon fiber is made by plying 1500D nylon fiber and cotton fiber. After plying, the tensile strength of a single warp thread is 900N / thread and the density is 138 threads / 10cm.

[0092] The overall weft cotton content of the core is 37%.

[0093] Example 9: A polyarylate fabric integral belt core for a coal mine conveyor belt, comprising a five-layer integral woven structure consisting of liquid crystal polyarylate fibers, nylon fibers and cotton fibers.

[0094] The width of the overall belt core of the polyarylate fabric for coal mine conveyor belt is 1462mm.

[0095] The warp force lines of the overall belt core are made of liquid crystal polyarylate fibers.

[0096] The liquid crystal polyarylate fiber is formed by plying 1500D high-strength liquid crystal polyarylate fibers. The tensile strength of a single fiber after plying is 3000N, and the density is 231 fibers / 10cm.

[0097] The upper and lower layers of warp threads of the integral belt core are cotton fibers, and the middle three layers of warp threads are liquid crystal polyarylate fibers.

[0098] The overall warp cotton content of the core is 17%.

[0099] The overall belt core weft force line is made of nylon fiber.

[0100] Nylon fiber is made by plying 1500D nylon fiber and cotton fiber. After plying, the tensile strength of a single warp thread is 1050N / thread and the density is 133 threads / 10cm.

[0101] The overall weft cotton content of the core is 36%.

[0102] Example 10: A polyarylate fabric integral belt core for a coal mine conveyor belt, comprising a five-layer integral woven structure consisting of liquid crystal polyarylate fibers, nylon fibers and cotton fibers.

[0103] The width of the overall belt core of the polyarylate fabric for coal mine conveyor belt is 1456mm.

[0104] The warp force lines of the overall belt core are made of liquid crystal polyarylate fibers.

[0105] The liquid crystal polyarylate fiber is formed by plying 1500D high-strength liquid crystal polyarylate fibers. The tensile strength of a single fiber after plying is 3500N, and the density is 236 fibers / 10cm.

[0106] The upper and lower layers of warp threads of the integral belt core are cotton fibers, and the middle three layers of warp threads are liquid crystal polyarylate fibers.

[0107] The overall warp cotton content of the core is 15%.

[0108] The overall belt core weft force line is made of nylon fiber.

[0109] Nylon fiber is made by plying 1500D nylon fiber and cotton fiber. After plying, the tensile strength of a single warp thread is 1250N / thread and the density is 124 threads / 10cm.

[0110] The overall weft cotton content of the core is 35%.

[0111] The performance test was conducted on the polyarylate fabric integral belt core for coal mine conveyor belts prepared in Examples 1 to 10 after being dipped and plasticized. The dipping formula composition is:

[0112] 1OOkg polyethylene paste resin, 50kg dioctyl phthalate, 15kg epoxidized soybean oil, 20kg 52# medium-chain chlorinated paraffin, 25kg TCEP, 10kg aluminum hydroxide, 6kg antimony trioxide, and 5kg calcium-zinc composite stabilizer.

[0113] After the dipping, the rubber content of the whole belt core of the polyarylate fabric is 60%, the plasticizing temperature is 170°C, and the plasticizing time is 2 min / mm.

[0114] The results are shown in Table 1:

[0115] Table 1

[0116]

[0117]

[0118] As shown in Table 1, the polyarylate fabric integral belt core prepared by the present invention has excellent mechanical properties and flame retardant properties after dipping and plasticizing, high mechanical joint strength, and a longitudinal full-thickness tensile strength of up to 7694 N / mm, which can meet the demand for high-strength fabric integral belt core.

[0119] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polyarylate fabric integral belt core for a coal mine conveyor belt, characterized in that: A 4-5 layer overall woven structure consisting of liquid crystal polyarylate fibers, nylon fibers and cotton fibers; The width of the overall belt core of the polyarylate fabric for coal mine conveyor belt is 104-106% of the nominal width of the conveyor belt.

2. The polyarylate fabric integral belt core for coal mine conveyor belt according to claim 1, characterized in that: The warp force lines of the integral belt core are made of liquid crystal polyarylate fibers.

3. The polyarylate fabric integral belt core for coal mine conveyor belt according to claim 2, characterized in that: The liquid crystal polyarylate fiber is formed by plying 1000D or 1500D high-strength liquid crystal polyarylate fibers, and the tensile strength of a single fiber after plying is 1500-3500N, and the density is 184-279 fibers / 10cm.

4. The polyarylate fabric integral belt core for coal mine conveyor belt according to claim 1, characterized in that: The upper and lower layers of warp threads of the integral belt core are cotton fibers, and the middle 2-3 layers of warp threads are liquid crystal polyarylate fibers.

5. The polyarylate fabric integral belt core for coal mine conveyor belt according to claim 1, characterized in that: The warp cotton content of the integral belt core is 15-25%.

6. The polyarylate fabric integral belt core for coal mine conveyor belt according to claim 1, characterized in that: The integral belt core latitude force bearing line is made of nylon fiber.

7. The polyarylate fabric integral belt core for coal mine conveyor belt according to claim 6, characterized in that: The nylon fiber is formed by plying 1000D or 1500D nylon fiber and cotton fiber. After plying, the tensile strength of a single weft thread is 450-1250N / thread, and the density is 124-160 threads / 10cm.

8. The polyarylate fabric integral belt core for coal mine conveyor belt according to claim 1, characterized in that: The integral belt core has a weft cotton content of 35-45%.

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