Polyester industrial yarn for deep-sea drilling platform and preparation method thereof

Abstract

The present application relates to the field of spinning fibers, and in particular to a polyester industrial yarn for deep-sea drilling platforms and a preparation method thereof, wherein the preparation steps mainly include solid-phase viscosity enhancement treatment of polyester slices, melt blending, melt spinning, stretching and shaping, and winding. The present application endows the polyester fiber with excellent strength and corrosion resistance through the improvement of oil agent and process, which can effectively meet the operating conditions of deep-sea drilling platforms.

Description

Technical Field

[0001] The present application relates to the field of spinning fibers, and more specifically, to a polyester industrial yarn for deep-sea drilling platforms and a preparation method thereof. Background Art

[0002] Deep-sea drilling platforms are important facilities for offshore oil development. However, due to their extremely harsh working environment, they generally have high requirements for material performance. At this stage, deep-sea drilling platforms mainly use steel wire as reinforcement material. However, due to the problems of heavy weight and poor corrosion resistance of steel wire, spinning fibers that can effectively replace it have come into being.

[0003] In the related technology, the spinning fibers that can be applied to deep-sea drilling platforms are exemplified by relatively superior polyester industrial yarns, which refer to high-strength, coarse-denier polyester industrial filaments with a fineness of not less than 550 dtex, and generally have excellent properties such as high breaking strength, high elastic modulus, low elongation, and good impact resistance.

[0004] It should be noted that: due to the particularity of the usage scenario, although some polyester industrial yarns can reach the strength indicators under normal conditions, they are still susceptible to corrosion, temperature and many other influences in deep-sea environments, resulting in actual application performance significantly lower than expected and a short service life. Therefore, a polyester industrial yarn for a deep-sea drilling platform and a preparation method thereof are specially provided. Summary of the invention

[0005] In order to improve the above technical problems, the present application specifically provides a polyester industrial yarn for deep-sea drilling platforms and its preparation process. Mainly through the improvement of oil agents and processes, the polyester fiber is given excellent strength and corrosion resistance, which can effectively meet the operating conditions of deep-sea drilling platforms.

[0006] In a first aspect, the present application provides a method for preparing polyester industrial yarn for deep-sea drilling platforms, which adopts the following technical solution:

[0007] A method for preparing polyester industrial yarn for deep-sea drilling platforms, the preparation steps are as follows:

[0008] S1, polyester slice solid phase viscosity enhancement treatment;

[0009] S2, melt blending: melt the anti-ultraviolet masterbatch at 275-290°C, and then melt blend it with the polyester chips pretreated in S1, with the melting temperature being 275-295°C and the time being 2-5min;

[0010] S3, melt spinning: after the mixed solution obtained in S2 is spun, it is first cooled and solidified by side blowing, and then the first oiling is performed. The first oiling is a base oil agent, and the oiling rate is 0.3-1.6%;

[0011] S4, stretching and shaping: then the tow after oiling in S3 is subjected to drafting and shaping, network treatment and second oiling in sequence, the second oiling is a functional oil, and the oiling rate is 0.5-2.0%;

[0012] The functional oil agent is composed of one or more of polyoxyethylene rosin acid ester, hydroxyethyl ethylene bisstearamide, calcium dinonylnaphthalene sulfonate and hydrogenated castor oil;

[0013] S4, winding and forming: winding the wire harness stretched and shaped in S4 to obtain the wire harness.

[0014] Preferably, the amounts of the polyester chips, anti-ultraviolet masterbatch, base oil agent and functional oil agent are as follows by weight percentage: polyester chips 93.9-98.4%, anti-ultraviolet masterbatch 0.8-2.5%, base oil agent 0.3-1.6%, functional oil agent 0.5-2.0%.

[0015] Preferably, the base oil is selected from one or more of mineral oil, methyl silicone oil, polyoxyethylene stearate, and polyoxyethylene polyoxypropylene copolyether.

[0016] Preferably, the functional oil agent is composed of polyoxyethylene rosin acid ester, hydroxyethyl ethylene bisstearamide, calcium dinonylnaphthalene sulfonate and hydrogenated castor oil.

[0017] Preferably, the components of the functional oil are as follows by weight percentage:

[0018] 8.1-9.5% of polyoxyethylene rosin acid ester, 1.9-2.5% of hydroxyethyl ethylene bisstearamide, 3.0-5.0% of calcium dinonylnaphthalene sulfonate, and the balance is hydrogenated castor oil.

[0019] Preferably, the specific conditions for the solid phase viscosity enhancement treatment of the polyester chips in S1 are: placing the polyester chips in a solid phase polymerization viscosity enhancement reactor and treating them at 170-220° C. for 24-36 hours.

[0020] Preferably, the specific conditions for cooling and solidifying by blowing air in S2 are: wind speed 0.3-1.0 m / s, temperature 18-25° C., and humidity 60-70%.

[0021] Preferably, the conditions for drawing and setting in S4 are: drawing temperature 220-235° C., total drawing ratio 5.6-6.2, relaxation temperature 150-190° C., total relaxation ratio 0.8-3.0%.

[0022] Preferably, the pressure of the network treatment in S4 is 0.15-0.40 MPa.

[0023] In a second aspect, the present application provides a polyester industrial yarn for a deep-sea drilling platform, which is produced by any of the above-mentioned methods for preparing polyester industrial yarn for a deep-sea drilling platform. The obtained polyester industrial yarn has excellent strength and corrosion resistance, and can effectively meet the operating conditions of the deep-sea drilling platform.

[0024] In summary, this application has the following beneficial effects:

[0025] 1. The polyester industrial yarn obtained by oiling twice in the present application has excellent corrosion resistance and strength through the coordination of oil agent selection and process conditions, which makes the polyester industrial yarn not easily damaged by extreme conditions when used in deep-sea operations;

[0026] 2. The functional oil in the present application can not only cooperate with the base oil to increase the bundling and textile convenience of spinning, but also can be compounded with the traction and shaping process, and the functional oil can penetrate into the spinning fiber to significantly enhance the corrosion resistance of the original spinning fiber;

[0027] 3. The polyester industrial yarn for deep-sea drilling platforms prepared by the preparation process of this application has stable and uniform quality and excellent corrosion resistance and strength, and can effectively meet the relevant operations in the field of deep-sea drilling. DETAILED DESCRIPTION

[0028] The present application is further described in detail below with reference to the embodiments.

[0029] Preparation Example

[0030] Preparation Example 1-5

[0031] A functional oil agent, the dosage of each component of which is shown in the following table, is prepared by mixing and dispersing:

[0032] Table: Components and weights of functional oil raw materials in Preparation Examples 1-5 (kg)

[0033]

[0034] Preparation Example 6-10

[0035] A functional oil agent, which differs from Preparation Example 1 in that the amounts of its components are shown in the following table, and is prepared by mixing and dispersing:

[0036] Table: Components and weights of functional oil raw materials in Preparation Examples 6-10 (kg)

[0037]

[0038] Performance testing

[0039] The polyester industrial yarn (3000D / 384F) prepared in the following embodiments and / or comparative examples was selected as the test object, and its mechanical properties before and after simulated deep-sea operation were tested. The specific test conditions are as follows:

[0040] First, refer to GB / T14344-2008 "Test method for tensile properties of chemical fiber filaments" to test its breaking strength (cN / dtex) to characterize the mechanical properties of polyester industrial yarn;

[0041] Then the polyester industrial yarn sample was placed horizontally in a deep sea environment testing machine, the deep sea environment testing machine was purchased from Simingte (Jinan) Technology Co., Ltd., model: SUPF-HD-120, and the test conditions were as follows:

[0042] Test medium: seawater / simulated depth: 10000m / test temperature: 2℃ / test pressure: 101MPa / test duration: 48h (calculated to be equivalent to 60d at a depth of 1000m);

[0043] It should be noted that the actual drilling operation environment is mostly 1000m. Here, in order to accelerate the simulation of aging conditions, the condition of 10000m was used, and then the breaking strength (cN / dtex) of the polyester industrial yarn was tested again, and the test results were averaged and recorded (three groups of parallel tests).

[0044] Example

[0045] Examples 1-5

[0046] A polyester industrial yarn for deep-sea drilling platforms, the dosage of each component is as follows:

[0047] Table: Components and weights of polyester industrial yarn raw materials for deep-sea drilling platforms in Examples 1-5 (kg)

[0048]

[0049] The polyester chips were purchased from Zhejiang Guxiandao Green Fiber Co., Ltd. with the brand name GC811;

[0050] The anti-UV masterbatch was purchased from Shandong Nuosen Plastic Co., Ltd., brand: NS anti-aging 007;

[0051] The base oil is methyl silicone oil, and the functional oil is prepared in Preparation Example 1;

[0052] And it is prepared by the following preparation process:

[0053] S1. Solid phase viscosity enhancement treatment of polyester chips: The polyester chips were placed in a solid phase polymerization viscosity enhancement reactor and dried and viscosity enhanced at 170° C. for 36 hours.

[0054] S2, melt blending: melt the anti-ultraviolet masterbatch at 280°C, and then melt blend it with the polyester chips pretreated in S1, with the melting temperature being 285°C and the time being 5 minutes.

[0055] S3, melt spinning: After the mixed solution obtained in S2 is spun, it is first cooled and solidified by side blowing at a wind speed of 0.3m / s, a temperature of 18°C, and a humidity of 60%, and then oiled for the first time by an oil pump with a specification of 0.05cc. The first oiling is a base oil agent with an oiling rate of 0.3%.

[0056] S4, stretching and shaping: then the tow after oiling in S3 is subjected to drafting and shaping, network treatment and second oiling in sequence, the second oiling is a functional oil, and the oiling rate is 0.5%;

[0057] The conditions for drawing and shaping are: drawing temperature 220°C, total drawing ratio 5.6, relaxation temperature 150°C, total relaxation ratio 0.8%; the pressure of network treatment is 0.15Mpa.

[0058] S4, winding and forming: the wire bundle after stretching and shaping in S4 is wound and formed by a winding machine to obtain polyester industrial yarn for deep-sea drilling platforms.

[0059] Comparative Example 1

[0060] A polyester industrial yarn for deep-sea drilling platforms, which is different from Example 1 only in that the second oiling in step S4 is still the base oil, i.e., methyl silicone oil.

[0061] The polyester industrial yarns prepared in the above Examples 1-5 and Comparative Example 1 were selected as test objects, and then their mechanical properties before and after simulated deep-sea operations were tested according to the above steps. The average values ​​of the test results were recorded in the following table.

[0062] Table: Performance test results of Examples 1-5 and Comparative Example 1

[0063]

[0064] It can be seen from the above table that the polyester industrial yarn for deep-sea drilling platforms obtained in Examples 1-5 has excellent mechanical properties and corrosion resistance, and its breaking strength before simulated deep-sea operation is 7.5-7.8 cN / dtex, and its breaking strength after simulated deep-sea operation is 7.1-7.4 cN / dtex;

[0065] In summary, it can be seen that the above polyester industrial yarns can effectively meet the application in deep-sea operations, and can ensure the safety of operations by resisting the corrosiveness and high pressure conditions of the deep-sea environment. Compared with comparative example 1, they are all improved to varying degrees. The reasons may be analyzed as follows:

[0066] The functional oil agent in the present application, in addition to playing a basic lubricating role like the base oil agent, can also significantly enhance the corrosion resistance of the original spun fibers by virtue of the penetration of the functional oil agent into the spun fibers. Thanks to the special selection of components, it is not easy to seep out due to the high-pressure environment of the deep sea. Therefore, the comparative example 1 using conventional oil agent obviously cannot achieve the above-mentioned effect, and various performances are reduced to varying degrees.

[0067] In addition, it can be seen from Examples 1-5 that the preferred amounts of the components of the polyester chips, anti-UV masterbatch, base oil, and functional oil are as follows by weight percentage: 93.9-98.4% polyester chips, 0.8-2.5% anti-UV masterbatch, 0.3-1.6% base oil, and 0.5-2.0% functional oil; where too little polyester chips will affect its basic mechanical properties before simulated deep-sea operations, and too much functional oil will affect the mechanical properties after simulated deep-sea operations. Analysis shows that this may be related to the high-pressure environment of the deep sea, which leads to the seepage of the functional oil and the subsequent loss of its original performance.

[0068] Embodiment 6-9

[0069] A polyester industrial yarn for a deep-sea drilling platform is different from Example 1 in that the usage of the functional oil agent is different, and the specific corresponding relationship is shown in the table below.

[0070] Table: Comparison of functional oil usage in Examples 6-9

[0071] Group Functional oil Example 6 Prepared from Preparation Example 2 Example 7 Prepared from Preparation Example 3 Example 8 Prepared by Preparation Example 4 Example 9 Prepared from Preparation Example 5

[0072] The polyester industrial yarns prepared in the above Examples 6-9 were selected as test objects, and then their mechanical properties before and after simulated deep-sea operations were tested according to the above steps. The average values ​​of the test results were recorded in the following table.

[0073] Table: Performance test results of Examples 6-9

[0074]

[0075] It can be seen from the above table that the polyester industrial yarn for deep-sea drilling platforms obtained in Examples 6-9 has excellent mechanical properties and corrosion resistance, and its breaking strength before simulated deep-sea operation is 7.8 cN / dtex, and its breaking strength after simulated deep-sea operation is 7.4-7.6 cN / dtex;

[0076] In summary, it can be seen that when the oiling rate is constant, the selection of the above functional oil agent will not affect the breaking strength before the simulated deep-sea operation, but will only affect the breaking strength after the simulated deep-sea operation. With reference to Examples 6-9, the theoretical analysis is as follows:

[0077] One or more of polyoxyethylene rosin acid ester, hydroxyethyl ethylene bisstearamide, calcium dinonylnaphthalene sulfonate and hydrogenated castor oil can enhance the corrosion resistance by penetrating into the fiber. In addition, since the functional oil agent does not contain surfactants, the penetration is more efficient. Among them, calcium dinonylnaphthalene sulfonate can effectively adsorb the penetrating components, thereby adapting to the high-pressure operating environment on the seabed.

[0078] Examples 10-14

[0079] A polyester industrial yarn for a deep-sea drilling platform is different from Example 1 in that the usage of the functional oil agent is different, and the specific corresponding relationship is shown in the table below.

[0080] Table: Comparison of the usage of functional oils in Examples 10-14

[0081] Group Functional oil Example 10 Prepared from Preparation Example 6 Embodiment 11 Prepared from Preparation Example 7 Example 12 Prepared from Preparation Example 8 Embodiment 13 Prepared from Preparation Example 9 Embodiment 14 Prepared from Preparation Example 10

[0082] The polyester industrial yarns prepared in the above Examples 10-14 were selected as test objects, and then their mechanical properties before and after simulated deep-sea operations were tested according to the above steps. The average values ​​of the test results were recorded in the following table.

[0083] Table: Performance test results of Examples 10-14

[0084]

[0085] It can be seen from the above table that the polyester industrial yarn for deep-sea drilling platforms obtained in Examples 10-14 has excellent mechanical properties and corrosion resistance, and its breaking strength before simulated deep-sea operation is 7.8 cN / dtex, and its breaking strength after simulated deep-sea operation is 7.6-7.8 cN / dtex;

[0086] In summary, it can be seen that when the oiling rate is constant, the selection of the above functional oil agent will not affect the breaking strength before the simulated deep-sea operation, but will only affect the breaking strength after the simulated deep-sea operation. For details, refer to Examples 10-14, as follows:

[0087] The preferred components of the functional oil are as follows by weight percentage: 8.1-9.5% of polyoxyethylene rosin acid ester, 1.9-2.5% of hydroxyethyl ethylene bisstearamide, 3.0-5.0% of calcium dinonylnaphthalenesulfonate, and the balance is hydrogenated castor oil. Adjustment within this range can obtain polyester industrial yarn with stable performance.

[0088] The dosage ratio of calcium dinonylnaphthalene sulfonate to the sum of polyoxyethylene rosin acid ester and hydroxyethyl ethylene bisstearamide should not be too high, and the preferred weight ratio is 1:(2-3). When the dosage ratio is too high, referring to Examples 13-14, the breaking strength after simulating deep-sea operation is only 7.6 cN / dtex, which has decreased slightly. Analysis shows that this may be related to the weakened adsorption of calcium dinonylnaphthalene sulfonate on the infiltrated components.

[0089] Examples 15-17

[0090] A polyester industrial yarn for deep-sea drilling platforms, which is different from Example 1 in that the specific conditions for the solid phase viscosity enhancement treatment of the polyester slices in S1 are different, as shown in the following table:

[0091] Comparison table of solid phase thickening treatment conditions in S1 of Examples 15-17

[0092] Group Solid phase thickening treatment conditions in S1 Embodiment 15 Drying and viscosity enhancement at 200℃ for 30h Example 16 Drying and viscosity enhancement at 220℃ for 24h Embodiment 17 Drying and viscosity enhancement at 250℃ for 18h

[0093] The polyester industrial yarns obtained in the above Examples 15-17 were selected as test objects, and then their mechanical properties before and after simulated deep-sea operations were tested according to the above steps. The average values ​​of the test results were recorded in the following table.

[0094] Table: Performance test results of Examples 15-17

[0095]

[0096] It can be seen from the above table that the polyester industrial yarn for deep-sea drilling platforms obtained in Examples 15-17 has excellent mechanical properties and corrosion resistance, and its breaking strength before simulated deep-sea operation is 7.7-7.8 cN / dtex, and its breaking strength after simulated deep-sea operation is 7.3 cN / dtex;

[0097] In summary, it can be seen that the change of the process conditions will only affect the breaking strength before deep-sea operations, and the preferred conditions are: drying and thickening at 170-220°C for 24-36 hours. Adjustments within this range are conducive to ensuring the stability of product quality and are conducive to industrial production.

[0098] Examples 18-20

[0099] A polyester industrial yarn for deep-sea drilling platforms, which is different from Example 1 in that the specific conditions for blowing cooling and solidification in S2 are different, as shown in the following table:

[0100] Comparison table of air blowing cooling and solidification conditions in S2 of Examples 18-20

[0101] Group S2 Testing of Blowing Cooling Solidification Conditions Embodiment 18 Wind speed 0.5m / s, temperature 20℃, humidity 60% Embodiment 19 Wind speed 1.0m / s, temperature 25℃, humidity 60% Embodiment 20 Wind speed 1.5m / s, temperature 30℃, humidity 70%

[0102] The polyester industrial yarns obtained in the above Examples 18-20 were selected as test objects, and then their mechanical properties before and after simulated deep-sea operations were tested according to the above steps. The average values ​​of the test results were recorded in the following table.

[0103] Table: Performance test results of Examples 18-20

[0104]

[0105] It can be seen from the above table that the polyester industrial yarn for deep-sea drilling platforms obtained in Examples 18-20 has excellent mechanical properties and corrosion resistance, and its breaking strength before simulated deep-sea operation is 7.6-7.8 cN / dtex, and its breaking strength after simulated deep-sea operation is 7.3 cN / dtex;

[0106] In summary, it can be seen that the change of the process conditions will only affect the breaking strength before deep-sea operations, and the preferred conditions are: wind speed 0.3-1.0m / s, temperature 18-25℃, humidity 60-70%. Adjustments within this range are conducive to industrial production. Adjustments beyond this range are likely to affect the original performance. Analysis may be related to changes in the crystallization and orientation of the fibers.

[0107] Examples 21-23

[0108] A polyester industrial yarn for deep-sea drilling platforms, which is different from Example 1 in that the specific conditions for traction and shaping in S4 are different, as shown in the following table:

[0109] Comparison table of traction and shaping conditions in S4 of Examples 21-23

[0110] Group S4 medium traction shaping conditions Embodiment 21 Drawing temperature 225℃, total drawing ratio 6.0, relaxation temperature 160℃, total relaxation ratio 1.5% Embodiment 22 Drawing temperature 235℃, total drawing ratio 6.2, relaxation temperature 190℃, total relaxation ratio 3.0% Embodiment 23 Drawing temperature 210℃, total drawing ratio 6.5, relaxation temperature 200℃, total relaxation ratio 2.0%

[0111] The polyester industrial yarns obtained in the above Examples 21-23 were selected as test objects, and then their mechanical properties before and after simulated deep-sea operations were tested according to the above steps. The average values ​​of the test results were recorded in the following table.

[0112] Table: Performance test results of Examples 21-23

[0113]

[0114] It can be seen from the above table that the polyester industrial yarn for deep-sea drilling platforms obtained in Examples 21-23 has excellent mechanical properties and corrosion resistance, and its breaking strength before simulated deep-sea operation is 7.5-7.9 cN / dtex, and its breaking strength after simulated deep-sea operation is 7.2-7.3 cN / dtex;

[0115] In summary, it can be seen that the process conditions will have a certain impact on the breaking strength before and after deep-sea operations, and the optimal conditions are: drawing temperature 220-235°C, total drawing ratio 5.6-6.2, relaxation temperature 150-190°C, total relaxation ratio 0.8-3.0%. Adjustments within this range are conducive to industrial production.

[0116] Adjustments beyond this range are likely to affect the original performance. Analysis shows that this may be related to the different surface quality of the fiber, which leads to the insignificant penetration of the functional oil agent in the second oiling. Therefore, the breaking strength of Example 23 before and after deep-sea operation is relatively low.

[0117] Examples 24-26

[0118] A polyester industrial yarn for deep-sea drilling platforms, which is different from Example 1 in that the network processing pressure in S4 is different, as shown in the following table:

[0119] Comparison table of network processing pressure conditions in S2 of Examples 24-26

[0120] Group Network processing stress conditions in S4 Embodiment 24 The network processing pressure is 0.30Mpa Embodiment 25 The network processing pressure is 0.40Mpa Embodiment 26 The network processing pressure is 0.05Mpa

[0121] The polyester industrial yarns obtained in the above Examples 24-26 were selected as test objects, and then their mechanical properties before and after simulated deep-sea operations were tested according to the above steps. The average values ​​of the test results were recorded in the following table.

[0122] Table: Performance test results of Examples 24-26

[0123]

[0124] It can be seen from the above table that the polyester industrial yarn for deep-sea drilling platforms obtained in Examples 24-26 has excellent mechanical properties and corrosion resistance, and its breaking strength before simulated deep-sea operation is 7.6-7.8 cN / dtex, and its breaking strength after simulated deep-sea operation is 7.3 cN / dtex;

[0125] From the above, it can be seen that the change of process conditions will only affect the breaking strength before deep-sea operation, and the preferred processing pressure is 0.15-0.40Mpa. The adjustment performance within this range is uniform. If the pressure is lower than this range, it will affect the mechanical properties. The analysis may be related to the change in fiber network degree.

[0126] This specific application example is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the application example without any creative contribution as needed. However, as long as it is within the scope of the claims of the present application, it shall be protected by the patent law.

Claims

1. A method for preparing polyester industrial yarn for deep-sea drilling platforms, characterized in that: The preparation steps are as follows: S1, polyester slice solid phase viscosity enhancement treatment; S2, melt blending: melt the anti-ultraviolet masterbatch at 275-290°C, and then melt blend it with the polyester chips pretreated in S1, with the melting temperature being 275-295°C and the time being 2-5min; S3, melt spinning: after the mixed solution obtained in S2 is spun, it is first cooled and solidified by side blowing, and then the first oiling is performed. The first oiling is a base oil agent, and the oiling rate is 0.3-1.6%; S4, stretching and shaping: the tows after oiling in S3 are then subjected to drafting and shaping, network treatment and second oiling in sequence, the second oiling is a functional oil, and the oiling rate is 0.5-2.0%; S4, winding and forming: winding the wire harness stretched and shaped in S4 to obtain the wire harness; The amounts of the above polyester chips, anti-ultraviolet masterbatch, base oil agent and functional oil agent are calculated by weight percentage as follows: polyester chips 93.9-98.4%, anti-ultraviolet masterbatch 0.8-2.5%, base oil agent 0.3-1.6%, functional oil agent 0.5-2.0%; The components of the functional oil are as follows by weight percentage: 8.1-9.5% polyoxyethylene rosin acid ester, 1.9-2.5% hydroxyethyl ethylene bisstearamide, 3.0-5.0% calcium dinonylnaphthalene sulfonate, and the balance is hydrogenated castor oil.

2. The method for preparing polyester industrial yarn for deep-sea drilling platform according to claim 1, characterized in that: The base oil is selected from one or more of mineral oil, methyl silicone oil, polyoxyethylene stearate, and polyoxyethylene polyoxypropylene copolyether.

3. The method for preparing polyester industrial yarn for deep-sea drilling platform according to claim 1, characterized in that: The specific conditions of the solid phase viscosity enhancement treatment of the polyester chips in S1 are: placing the polyester chips in a solid phase polymerization viscosity enhancement reactor and treating them at 170-220° C. for 24-36 hours.

4. The method for preparing polyester industrial yarn for deep-sea drilling platform according to claim 1, characterized in that: The specific conditions for cooling and solidifying by side-blowing air in S3 are: wind speed 0.3-1.0 m / s, temperature 18-25° C., and humidity 60-70%.

5. The method for preparing polyester industrial yarn for deep-sea drilling platform according to claim 1, characterized in that: The conditions for stretching and setting in S4 are: stretching temperature 220-235℃, total stretching ratio 5.6-6.2, relaxation temperature 150-190℃, total relaxation ratio 0.8-3.0%.

6. The method for preparing polyester industrial yarn for deep-sea drilling platform according to claim 1, characterized in that: The pressure of network processing in S4 is 0.15-0.40 Mpa.

7. A polyester industrial yarn for deep-sea drilling platforms, characterized in that: The polyester industrial yarn is prepared by the method for preparing polyester industrial yarn for deep-sea drilling platform as described in any one of claims 1-6.

Images