High-strength impregnated cord fabric conveying belt framework material and preparation method thereof

Abstract

The invention discloses a high-strength gum dipping cord fabric conveying belt framework material and a preparation method thereof.The preparation method comprises the steps that firstly, yarn is subjected to primary twisting and multiple times of secondary twisting, the twisting direction of the primary twisting is the same as that of the first time of secondary twisting, and cord threads are obtained; the prepared cord threads serve as warp yarns, the warp yarns and weft yarns are arranged in a staggered mode to be woven into cord fabric structure gray cloth, selvage yarns are added to the two sides of the warp yarns at the same time, a selvage folding method is adopted for folding the selvage yarns, and cord fabric is obtained; and carrying out gum dipping on the prepared cord fabric. The high-strength characteristic of the diameter straight-weft aramid fiber canvas belt and the advantage of light weight of the aramid fiber cord fabric are combined, the defect that the diameter straight-weft aramid fiber belt is poor in flame retardant property is overcome, the diameter straight-weft aramid fiber canvas belt is lighter and thinner than the diameter straight-weft aramid fiber belt, and the strength is improved.

Description

Technical Field

[0001] The invention relates to the technical field of dipped cord fabrics, and in particular to a high-strength dipped cord fabric conveyor belt skeleton material and a preparation method thereof. Background Art

[0002] Existing straight-diameter aramid canvases are widely used in heavy-load and long-distance transportation due to their thickness and high strength. However, since the nylon material accounts for about 15% to 45%, it is not flame-retardant and is not suitable for conveyor belts in high-temperature environments such as coal mines.

[0003] Although the existing traditional aramid cord fabric has high weaving efficiency, uses less weft yarn, is thin, and has reduced cost and overall weight, it is often inferior to the diameter straight weft aramid canvas in terms of strength level.

[0004] Therefore, this application designs a high-strength impregnated cord fabric conveyor belt skeleton material and its preparation method, combining the high-strength characteristics of the diameter straight weft aramid canvas belt and the lightweight advantages of aramid cord fabric, thereby improving the strength level, flame retardant properties and adhesion; it obviously has practical significance. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for preparing a high-strength dipped cord fabric conveyor belt skeleton material.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a method for preparing a high-strength impregnated cord fabric conveyor belt skeleton material, comprising the following steps:

[0007] S1, firstly twisting the yarn and performing several re-twisting, wherein the twist direction of the initial twist and the first re-twisting is the same, to obtain a cord;

[0008] S2, using the cord prepared in step S1 as warp yarn, interlacing the warp yarn and the weft yarn, and weaving the warp yarn and the weft yarn into a cord fabric structure fabric using a rapier loom, while adding selvedge yarns on both sides of the warp yarn and folding the selvedge yarns using a selvedge tuck-in method to obtain the cord fabric;

[0009] S3, dipping the cord fabric prepared in step S2 into glue.

[0010] Preferably, the content of aramid or polyarylate in the yarn in step S1 is 97.9-99.2%, and the rest is PET.

[0011] Preferably, the yarn in step S1 is 100% aramid or 100% polyarylate.

[0012] Preferably, the same twist direction of the initial twist and the secondary twist includes that both the initial twist and the secondary twist are S twist directions, or both the initial twist and the secondary twist are Z twist directions.

[0013] Preferably, the twist direction of each time of re-twisting is opposite.

[0014] Preferably, the yarn is twisted in step S1 and re-twisted twice, the two times of re-twisting are first re-twisting and second re-twisting respectively, and the twist directions of the first re-twisting and the second re-twisting are opposite.

[0015] Preferably, the weft yarn used in step S2 comprises PET staple fiber, the PET staple fiber comprises 10'S / 1 or 21'S / 2, and the weft yarn is 300D-600D.

[0016] Preferably, in step S2, the specific method of the selvedge folding method is that the weft yarn at the selvedge yarn is sheared and hooked to the selvedge yarn by a selvedge folding mechanism.

[0017] Preferably, the selvedge folding mechanism is arranged on both sides of a rapier loom and comprises a shearing mechanism and a hooking mechanism, the hooking mechanism comprises a hooking needle and a driving mechanism, and the driving mechanism drives the hooking needle to move to hook the sheared weft yarn and rotate the weft yarn to the direction close to the selvedge yarn.

[0018] Preferably, the hooking needle comprises an arc-shaped needle body and a hooking piece located on the arc-shaped needle body, the arc-shaped needle body is connected with the driving mechanism, and the hooking piece is located on the side surface of the end of the arc-shaped needle body away from the driving mechanism.

[0019] Preferably, the use method of the selvedge folding mechanism is that, during the weaving process, when the weft yarn moves to the between the warp yarns, the driving mechanism drives the hooking needle to rotate to the arc-shaped needle body inserted between the selvedge yarn and the warp yarn and rotate to the position close to the shearing mechanism, the shearing mechanism shears the weft yarn, the hooking piece on the hooking needle hooks the weft yarn and rotates in the opposite direction to make the weft yarn move to be inserted into the selvedge yarn to complete the selvedge folding.

[0020] Preferably, the selvedge yarn comprises one of aramid, polyarylate or PET, the thickness of the selvedge yarn is 1 / 3-1 / 4 of the thickness of the warp yarn, and the warp density of the selvedge yarn is 1.5-2 times of the warp density of the body.

[0021] Preferably, after the selvedge folding method is used in step S2, the warp yarn is 6000D-100000D, and the thickness of the selvedge is 0.5-0.8 times of the thickness of the body.

[0022] Preferably, in step S3, the specific method of the glue dipping is that, according to the type of the warp yarn, one-bath method or two-bath method is selected, the glue solution formula used in the one-bath method and the two-bath method is RFL glue solution, the process of the one-bath method is pouring opening-glue dipping-drying-high temperature reaction and drawing and setting-winding, the temperature of the drying is 100-150℃, the temperature of the high temperature reaction is 200-230℃, and the glue dipping speed is 5-15m / min.

[0023] Preferably, the process of two-bath dipping is as follows: opening, dipping in the first bath, drying, high-temperature reaction and drawing setting, dipping in the second bath, drying, high-temperature reaction and drawing setting, and winding; the drying temperature is 100-150 DEG C, the high-temperature reaction temperature is 200-230 DEG C, and the dipping speed is 5-15 m / min.

[0024] Preferably, the warp yarn is activated aramid and one-bath dipping is adopted; or the warp yarn is unactivated aramid or polyarylate and two-bath dipping is adopted.

[0025] Preferably, the solid content of the RFL glue solution in one-bath dipping is 3.5%; in two-bath dipping, the solid content of the RFL glue solution in the first bath is 3.5%, and the solid content of the RFL glue solution in the first bath is 25%.

[0026] The application also claims a high-strength dipped cord fabric conveyor belt skeleton material prepared by the above preparation method.

[0027] Thanks to the above technical solution, the application has the following advantages compared with the prior art:

[0028] 1. The application combines the high-strength characteristics of the diameter straight-weft aramid canvas belt and the lightweight advantages of the aramid cord fabric, overcomes the slight disadvantage of the diameter straight-weft aramid belt in flame retardation, and is lighter and thinner than the diameter straight-weft aramid belt, and the strength is improved.

[0029] 2. The application can select polyarylate or aramid to prepare the cord fabric according to the requirement, the polyarylate is consistent with the aramid in strength, thickness, fabric weight, fabric thickness and even cost, the fatigue resistance of the polyarylate conveyor belt is significantly better than that of the aramid; the aramid has obvious advantages in high-temperature use environment, but the strength of the polyarylate is better in extremely low-temperature environment, and the strength of the aramid decreases with the decrease of temperature, while the strength of the polyarylate increases with the decrease of temperature.

[0030] 3. The application also adopts the special twisting method of the same twist direction of the primary and secondary twists, so that the yarn and the fabric surface pattern are clearer, the contact area between the fabric surface and the rubber is effectively increased, and the adhesion is improved.

[0031] 4. The application also increases the special yarn method of the fabric edge folding-in, effectively solves the technical problems of the thick fabric edge of the conventional folding-in edge, the influence on the package and the unfolding-in edge. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 (a) is the cord in Example 2 of the present application, Figure 1 (b) is the cord of the diameter straight weft aramid canvas tape of comparative example 2;

[0034] Figure 2 (a) is the surface structure of the straight-weft aramid canvas with a medium diameter in comparative example 2. Figure 2 (b) is the fabric structure in Example 2 of the present application;

[0035] Figure 3 (a) is the diameter straight weft aramid canvas with selvedge structure in comparative example 2, Figure 3 (b) is a schematic diagram comparing the fabric edge structure in Example 2 of the present application with that in Example 3;

[0036] Figure 4 (a) is the selvedge structure of the aramid cord fabric in Comparative Example 1, Figure 4 (b) is a schematic diagram comparing the fabric edge structure in Example 2 of the present application.

[0037] Figure 5 (a) is the fabric fatigue test diagram of Example 2, Figure 5 (b) is the fabric fatigue test diagram of Example 7.

[0038] Figure 6 (a) is a single yarn breaking test diagram of Example 2; Figure 6 (b) is the single yarn fatigue test diagram of Example 7.

[0039] Figure 7 This is a strength comparison chart of aramid and polyarylate at different temperatures. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be described clearly and completely below. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0041] Example 1

[0042] A method for preparing a high-strength dipped cord fabric conveyor belt skeleton material comprises the following steps:

[0043] S1, firstly twisting the yarn and performing several re-twisting, wherein the twist direction of the initial twist and the first re-twisting is the same, to obtain a cord;

[0044] S2, using the cord prepared in step S1 as warp yarn, interlacing the warp yarn and the weft yarn, and weaving the warp yarn and the weft yarn into a cord fabric structure fabric using a rapier loom, while adding selvedge yarns on both sides of the warp yarn and folding the selvedge yarns using a selvedge tuck-in method to obtain the cord fabric;

[0045] S3, dipping the cord fabric prepared in step S2 into glue.

[0046] Furthermore, the content of aramid in the yarn in step S1 is 97.9-99.2%, and the rest is PET.

[0047] Furthermore, the same twist direction of the initial twist and the secondary twist includes that the initial twist and the secondary twist are both S twist directions, or the initial twist and the secondary twist are both Z twist directions.

[0048] Furthermore, the twist direction of each re-twist is opposite.

[0049] Furthermore, in step S1, the yarn is subjected to primary twisting and two secondary twistings, wherein the two secondary twistings are a first secondary twisting and a second secondary twisting, and the twist directions of the first secondary twisting and the second secondary twisting are opposite.

[0050] Furthermore, the weft yarn used in step S2 includes PET staple fibers, and the PET staple fibers include 10'S / 1 and 21'S / 2; and the weft yarn is 300D to 600D.

[0051] Furthermore, in step S2, the specific method of the selvedge tuck-in method is: using the selvedge tuck-in mechanism to cut the weft yarn at the selvedge yarn and hook the weft yarn to insert it into the selvedge yarn.

[0052] Furthermore, the fabric edge folding mechanism is arranged on both sides of the rapier-type cloth-making machine, including a shearing mechanism and a hooking mechanism. The hooking mechanism includes a hooking needle and a driving mechanism. The driving mechanism drives the hooking needle to move to hook the weft yarn cut by the shearing mechanism and drives the weft yarn to rotate in the direction close to the fabric edge yarn.

[0053] Furthermore, the hook needle includes an arc-shaped needle body and a hooking piece located on the arc-shaped needle body, the arc-shaped needle body is connected to the driving mechanism, and the hooking piece is located on the side of the arc-shaped needle body away from the driving mechanism.

[0054] Furthermore, the method of using the fabric edge folding mechanism is as follows: when the weft yarn moves between the warp yarns during the weaving process, the driving mechanism drives the hook needle to rotate to the arc-shaped needle body to insert between the fabric edge yarn and the warp yarn and rotate to a position close to the shearing mechanism. The shearing mechanism cuts the weft yarn while the hooking piece on the hook needle hooks the weft yarn and rotates in the opposite direction to move the weft yarn to insert into the fabric edge yarn to complete the folding.

[0055] Furthermore, the selvedge yarn comprises one of aramid, polyarylate or PET, the thickness of the selvedge yarn is 1 / 3 to 1 / 4 of the thickness of the warp yarn; the warp density of the selvedge yarn is 1.5 to 2 times the warp density of the cloth body.

[0056] Furthermore, after the selvedge tuck-in method is adopted in step S2, the warp yarn is 6000D to 100000D, and the selvedge thickness is 0.5 to 0.8 times the thickness of the cloth body.

[0057] Furthermore, in step S3, the specific method of dipping is: one-bath dipping or two-bath dipping is adopted according to the type of warp yarn, and the glue formula adopted for one-bath dipping and two-bath dipping is RFL glue; the dipping process is: pouring - dipping - drying - high temperature reaction and stretching and shaping - winding; the drying temperature is 100-150°C, the high temperature reaction temperature is 200-230°C, and the dipping speed is 5-15m / min.

[0058] Preferably, the process of the two-bath dipping method is: opening, dipping in one bath of glue, drying, high-temperature reaction and stretching and shaping, dipping in two baths of glue, drying, high-temperature reaction and stretching and shaping, and winding; the drying temperature is 100-150°C, the high-temperature reaction temperature is 200-230°C, and the dipping speed is 5-15m / min.

[0059] Preferably, when the warp yarn is activated aramid, one-bath dipping is adopted; when the warp yarn is unactivated aramid or polyarylate, two-bath dipping is adopted.

[0060] Preferably, the solid content of the RFL glue in the one-bath dipping method is 3.5%; in the two-bath dipping method, the solid content of the RFL glue in the first bath is 3.5%, and the solid content of the RFL glue in the second bath is 25%.

[0061] Furthermore, when the warp yarn is activated aramid, a one-bath dipping method is adopted, and when the warp yarn is non-activated aramid and polyarylate, a two-bath dipping method is adopted.

[0062] Furthermore, the solid content of the RFL glue in the one-bath dipping method is 3.5%; in the two-bath dipping method, the solid content of the RFL glue used in the first bath is 3.5%, and the solid content of the RFL glue used in the second bath is 25%.

[0063] Example 2

[0064] This embodiment is carried out on the basis of the above embodiment 1, and the similarities with the above embodiment are not repeated here.

[0065] In this embodiment, the aramid content in the warp yarn is 97.9%, and the remaining material is PET with a density of 9000D. The preparation method described in Example 1 is used to prepare a dipped cord fabric with a warp strength grade of 630 N / mm.

[0066] Example 3

[0067] This embodiment is carried out on the basis of the above embodiment 1, and the similarities with the above embodiment are not repeated here.

[0068] In this embodiment, the aramid content in the warp yarn is 98.5%, and the remaining material is PET with a density of 18000D. The preparation method described in Example 1 is used to prepare a dipped cord fabric with a warp strength grade of 1000 N / mm.

[0069] Example 4

[0070] This embodiment is carried out on the basis of the above embodiment 1, and the similarities with the above embodiment are not repeated here.

[0071] In this embodiment, the warp yarn contains 99% aramid and the remaining material is PET with a density of 27000D. The preparation method described in Example 1 is used to prepare a dipped cord fabric with a warp strength grade of 1600 N / mm.

[0072] Example 5

[0073] This embodiment is carried out on the basis of the above embodiment 1, and the similarities with the above embodiment are not repeated here.

[0074] In this embodiment, the warp yarn contains 99.2% aramid and the remaining material is PET with a density of 36000D. The preparation method described in Example 1 is used to prepare a dipped cord fabric with a warp strength grade of 2000 N / mm.

[0075] Example 6

[0076] This embodiment is carried out on the basis of the above embodiment 1, and the similarities with the above embodiment are not repeated here.

[0077] In this embodiment, the content of polyarylate in the warp yarn is 99.3%, and the remaining material is PET with a density of 90000D. The preparation method described in Example 1 is used to prepare a dipped cord fabric with a warp strength grade of more than 4500N / mm.

[0078] Example 7

[0079] This embodiment is carried out on the basis of the above-mentioned embodiment 1, and the similarities with the above-mentioned embodiment are not repeated here.

[0080] In this embodiment, the content of polyarylate in the warp yarn is 98.1%, and the remaining material is PET with a density of 9000D. The preparation method described in Example 1 is used to prepare a dipped cord fabric with a warp strength grade of 630 N / mm.

[0081] Example 8

[0082] This embodiment is carried out on the basis of the above-mentioned embodiment 1, and the similarities with the above-mentioned embodiment are not repeated here.

[0083] In this embodiment, the content of polyarylate in the warp yarn is 98.5%, and the remaining material is PET with a density of 18000D. The preparation method described in Example 1 is used to prepare a dipped cord fabric with a warp strength grade of 1000 N / mm.

[0084] Example 9

[0085] This embodiment is carried out on the basis of the above-mentioned embodiment 1, and the similarities with the above-mentioned embodiment are not repeated here.

[0086] In this embodiment, the content of polyarylate in the warp yarn is 96.6%, and the remaining material is PET with a density of 27000D. The preparation method described in Example 1 is used to prepare a dipped cord fabric with a warp strength grade of 1600 N / mm.

[0087] Example 10

[0088] This embodiment is carried out on the basis of the above-mentioned embodiment 1, and the similarities with the above-mentioned embodiment are not repeated here.

[0089] In this embodiment, the content of polyarylate in the warp yarn is 99.1%, and the remaining material is PET with a density of 36000D. The preparation method described in Example 1 is used to prepare a dipped cord fabric with a warp strength grade of 2000 N / mm.

[0090] Comparative Example 1

[0091] This comparative example is carried out on the basis of the above-mentioned Example 1, and the similarities with the above-mentioned Example are not repeated here.

[0092] This comparative example is a conventional cord fabric with an aramid content of 99% and a density of 13500D.

[0093] The preparation method of the conventional cord fabric is as follows: the yarn is twisted using a direct twisting machine, and the initial and final twists are completed at the same time. It is impossible to achieve the same twist direction for the initial and final twists, and a maximum of 3 strands of yarn can be twisted, and the twisting process capacity is limited; while the yarn of this application is twisted using a doubling machine + a single-spindle twisting machine, the initial and final twist directions can be freely set, and the number of strands is unlimited, as long as the final twist denier is not higher than 15000D; the cord fabric loom is an air-jet loom with limited weaving capacity, and the dipping process is consistent with Example 1.

[0094] Comparative Example 2

[0095] This comparative example is carried out on the basis of the above-mentioned Example 1, and the similarities with the above-mentioned Example are not repeated here.

[0096] In this comparative example, the aramid content in the warp yarn used is 56.8%, and the remaining material is nylon 66 with a density of 6000D. The preparation method described in Example 1 is used to prepare a dipped cord fabric with a warp strength grade of 630 N / mm.

[0097] Comparative Example 3

[0098] This comparative example is carried out on the basis of the above-mentioned Example 1, and the similarities with the above-mentioned Example are not repeated here.

[0099] In this comparative example, the warp yarn contains 70.1% aramid and the remaining material is nylon 66 with a density of 15000D. The preparation method described in Example 1 is used to prepare a dipped cord fabric with a warp strength grade of 1000 N / mm.

[0100] Comparative Example 4

[0101] This comparative example is carried out on the basis of the above-mentioned Example 1, and the similarities with the above-mentioned Example are not repeated here.

[0102] In this comparative example, the aramid content in the warp yarn used is 73.6%, and the remaining material is nylon 66 with a density of 24000D. The preparation method described in Example 1 is used to prepare a dipped cord fabric with a warp strength grade of 1600 N / mm.

[0103] Comparative Example 5

[0104] This comparative example is carried out on the basis of the above-mentioned Example 1, and the similarities with the above-mentioned Example are not repeated here.

[0105] In this comparative example, the warp yarn used contained 78.7% aramid, and the remaining material was nylon 66 with a density of 45000D. The preparation method described in Example 1 was used to prepare a dipped cord fabric with a warp strength grade of 2000 N / mm.

[0106] Comparative Example 6

[0107] This comparative example is carried out on the basis of the above-mentioned Example 1, and the similarities with the above-mentioned Example are not repeated here.

[0108] In this comparative example, the aramid content in the warp yarn used is 88.7%, and the remaining material is nylon 66 with a density of 126000D. The preparation method described in Example 1 is used to prepare a dipped cord fabric with a warp strength grade of more than 4500N / mm.

[0109] The dipped cord fabrics prepared in Examples 2 to 4 and Comparative Examples 1 to 5 were tested, and the results were shown in Table 1 and Figures 1 to 4 shown.

[0110] Table 1

[0111]

[0112]

[0113] It can be clearly seen from the above table that the cord fabric prepared by the preparation method and raw materials adopted in this application combines the high-strength characteristics of the aramid canvas belts shown in Comparative Examples 2 to 5 and the lightweight advantages of the aramid cord fabric shown in Comparative Example 1, and the strength level can reach 4500N / mm; the present invention overcomes the shortcomings of slightly poor flame retardant properties of the diameter straight weft aramid belt, and is lighter and thinner than the diameter straight weft aramid belts shown in Comparative Examples 2 to 5, and it also breaks through the strength level upper limit of 1000N / mm of the conventional aramid cord fabric shown in Comparative Example 1.

[0114] From the above table and Figure 7 It can be seen that the cord fabric made of polyarylate has a lower weight, and its strength is improved below 200°C, especially in extremely low temperature environments, and its fatigue resistance is qualitatively improved, which can effectively extend the service life of the conveyor belt; the cord fabric made of aramid has reduced strength in low temperature environments and is more suitable for high temperature environments.

[0115] from Figures 1 to 4 It can be clearly seen that the cord fabric prepared in this embodiment makes the yarn and fabric texture clearer, effectively increases the contact area between the fabric and the rubber, and is beneficial to the improvement of adhesion; in addition, the fabric edge processing technology is added to effectively solve the technical defects of the conventional tucked-in edge fabric edge having a large thickness affecting the winding, and solves the problem of loose edges without tucked-in edges.

[0116] The warp yarns and cord fabrics prepared in Example 2 and Example 6 were dipped in glue and subjected to fatigue resistance tests. The test conditions were: load: 400N; speed: 120 cycles / min; time: 4.0h, for a total of 28,800 times. The experimental results are shown in Table 2 and Figures 5 and 6 shown.

[0117] Table 2

[0118] Example 2 Example 6 Dipped single yarn strength (N) 2674 3007 Strength of dipped single yarn after fatigue (N) 181 1131 Strength retention rate after fatigue (%) 6.8 37.6

[0119] From Figure 5 it is obvious that the cord fabric prepared from aramid in Example 2 has aramid breakage on the fabric surface after testing; the cord fabric prepared from polyarylate in Example 7 has no polyarylate breakage on the fabric surface after testing; from Table 2 and Figure 6 it is obvious that the warp yarn prepared from aramid in Example 2 has aramid complete breakage after testing; the warp yarn prepared from polyarylate has incomplete polyarylate breakage after testing.

[0120] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for preparing a high-strength impregnated cord fabric conveyor belt skeleton material, characterized in that: The following steps are involved: S1, first performing a primary twist and at least one secondary twist on the yarn, wherein the primary twist and the first secondary twist have the same twist direction, to obtain a cord; S2, using the cord prepared in step S1 as warp yarn, interlacing the warp yarn and the weft yarn, and weaving the warp yarn and the weft yarn into a cord fabric structure fabric using a rapier loom, while adding selvedge yarns on both sides of the warp yarn and folding the selvedge yarns using a selvedge tuck-in method to obtain the cord fabric; S3, dipping the cord fabric prepared in step S2 into glue.

2. The method for preparing a high-strength dipped cord fabric conveyor belt skeleton material according to claim 1, characterized in that: The content of aramid or polyarylate in the yarn in step S1 is 97.9-99.2%, and the rest is PET.

3. The method for preparing a high-strength dipped cord fabric conveyor belt skeleton material according to claim 1, characterized in that: The yarn in step S1 is 100% aramid or 100% polyarylate.

4. The method for preparing a high-strength dipped cord fabric conveyor belt skeleton material according to claim 1, characterized in that: The same twist direction of the initial twist and the first secondary twist includes that the initial twist and the first secondary twist are both S twist directions, or the initial twist and the first secondary twist are both Z twist directions.

5. The method for preparing a high-strength dipped cord fabric conveyor belt skeleton material according to claim 1, characterized in that: The weft yarn used in step S2 includes PET staple fibers, including 10'S / 1 and 21'S / 2; the weft yarn is 300D to 600D.

6. The method for preparing a high-strength dipped cord fabric conveyor belt skeleton material according to claim 1, characterized in that: In step S2, the specific method of the selvedge tuck-in method is: using a selvedge tuck-in mechanism to cut the weft yarn at the selvedge yarn and hook the weft yarn to insert it into the selvedge yarn.

7. The method for preparing a high-strength dipped cord fabric conveyor belt skeleton material according to claim 6, characterized in that: The selvedge yarn comprises one of aramid, polyarylate or PET, the thickness of the selvedge yarn is 1 / 3 to 1 / 4 of the thickness of the warp yarn; the warp density of the selvedge yarn is 1.5 to 2 times the warp density of the cloth body.

8. The method for preparing a high-strength dipped cord fabric conveyor belt skeleton material according to claim 7, characterized in that: After the selvedge tuck-in method is adopted in step S2, the warp yarn is 6000D to 100000D, and the selvedge thickness is 0.5 to 0.8 times the thickness of the cloth body.

9. The method for preparing a high-strength dipped cord fabric conveyor belt skeleton material according to claim 1, characterized in that: In step S3, the specific method of dipping is: using a one-bath dipping method or a two-bath dipping method, and the glue formula used in the one-bath dipping method and the two-bath dipping method is RFL glue; The process of one-bath dipping is: opening - dipping - drying - high temperature reaction and stretching and shaping - winding; the drying temperature is 100-150℃, the high temperature reaction temperature is 200-230℃, and the dipping speed is 5-15m / min. The process of two-bath dipping is: opening, dipping in one bath of glue, drying, high-temperature reaction and stretching to set the shape, dipping in the second bath of glue, drying, high-temperature reaction and stretching to set the shape, and winding; the drying temperature is 100-150℃, the high-temperature reaction temperature is 200-230℃, and the dipping speed is 5-15m / min.

10. A high-strength dipped cord fabric conveyor belt frame material, characterized in that: The preparation method is described in any one of claims 1 to 8.

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