阅读说明：本技术 一种高阻燃耐火电缆填充绳及其制备方法 (High-flame-retardant fire-resistant cable filling rope and preparation method thereof ) 是由 张云 付前刚 周敏玉 张雨雷 史小红 王彪 强新发 郝桐帆 江涛 张灿灿 张云芳 于 2021-07-06 设计创作，主要内容包括：本发明公开一种高阻燃耐火电缆填充绳及其制备方法,包括以下步骤：利用原料制作纱线；将纱线浸渍在阻燃液中,取出后去除纱线内多余阻燃液；涂覆阻燃胶,压紧并去除多余阻燃胶；喷涂阻燃干粉；涂覆阻燃胶,压紧并去除多余阻燃胶,之后烘干；涂覆陶瓷化硅橡胶功能液,刮匀,之后烘干；制备填充绳,即得。本发明填充绳伸长率大于15％,具有包括纱线内部阻燃液在内的四层阻燃结构和外部的耐火结构,氧指数大于60％,在950℃下4h不开裂,同时具备优良的阻燃性能和耐火性能；表面具有抗氧化层自锁结构功能,提高产品在高温辐照环境下,阻燃与抗张强度的稳定性；无吸湿性,含水率小于1％。(The invention discloses a high flame-retardant fire-resistant cable filling rope and a preparation method thereof, wherein the preparation method comprises the following steps: making yarns by using raw materials; soaking the yarn in the flame-retardant liquid, and removing the redundant flame-retardant liquid in the yarn after taking out; coating flame-retardant glue, compressing and removing redundant flame-retardant glue; spraying flame-retardant dry powder; coating flame-retardant glue, compacting, removing redundant flame-retardant glue, and then drying; coating ceramic silicon rubber functional liquid, uniformly scraping, and then drying; preparing the filling rope to obtain the product. The elongation of the filling rope is more than 15%, the filling rope has a four-layer flame-retardant structure comprising flame-retardant liquid in the yarn and an external flame-retardant structure, the oxygen index is more than 60%, the filling rope does not crack at 950 ℃ for 4 hours, and the filling rope has excellent flame-retardant property and flame-retardant property; the surface has the function of an oxidation resistant layer self-locking structure, so that the stability of flame retardance and tensile strength of the product in a high-temperature irradiation environment is improved; no hygroscopicity, and water content less than 1%.)

1. A preparation method of a high-flame-retardant fire-resistant cable filling rope is characterized by comprising the following steps:

s1, making yarns by using the raw materials;

s2, soaking the yarn manufactured in the S1 in flame retardant liquid, and removing redundant flame retardant liquid in the yarn after the yarn is taken out to obtain A;

s3, coating the surface A obtained in the step S2 with flame retardant glue, compacting the surface A with flame retardant glue after coating is finished, and removing redundant flame retardant glue to obtain a product B;

s4, spraying flame-retardant dry powder on the surface B obtained in the step S3 to obtain C;

s5, coating the surface C obtained in the step S4 with flame retardant glue, after coating, compacting the surface C with flame retardant glue, removing redundant flame retardant glue, and then drying to obtain D;

s6, coating the surface D obtained in S5 with a ceramic silicon rubber functional liquid, after coating, scraping the surface E with the ceramic silicon rubber functional liquid uniformly, and then drying to obtain E;

s7 preparing filling rope from one or more E obtained from S6.

2. The preparation method of the high flame-retardant and fire-resistant cable filling rope according to claim 1, wherein the raw material in S1 is cotton, the yarn count of S1 is 2-3, and the specific preparation method of the yarn comprises the following steps:

s11, crushing the raw materials into small and long crushed materials by a high-speed tearing crusher, and processing the crushed materials by a coarse opener to obtain fibrous short filaments;

s12, processing the fibrous short filaments obtained in the step S11 by a large-bin cotton mixing machine to obtain fluffy fibers;

s13, further processing the fluffy fibers obtained in the step S12 by a fine opener, then collecting by an air pressure cotton box and carding by a carding machine to obtain a reticular fiber layer, and then manufacturing by adopting an air spinning process.

3. The preparation method of the high-flame-retardant and fire-resistant cable filling rope according to claim 1, wherein the flame-retardant liquid in S2 is a phosphorus-nitrogen aqueous flame-retardant liquid with a mass concentration of 15-25%.

4. The preparation method of the filling rope for the high-flame-retardant and fire-resistant cable according to claim 1, wherein the flame-retardant glue in the S3 and S5 comprises the following components in parts by mass: 7-8 parts of a flame retardant and 2-3 parts of an emulsion, wherein the flame retardant is magnesium hydroxide or a mixture of the magnesium hydroxide and the magnesium hydroxide, and the emulsion is an acrylic emulsion or an ethyl acetate copolymer emulsion.

5. The preparation method of the high flame-retardant and fire-resistant cable filling rope according to claim 1, wherein the flame-retardant dry powder in the S4 is magnesium hydroxide powder or aluminum hydroxide powder, and the mesh number of the flame-retardant dry powder is 1000-5000 meshes.

6. The method for preparing the filling rope of the high flame-retardant and fire-resistant cable according to claim 1, wherein D obtained in S5 in S6 is subjected to surface roughening treatment before being coated with the ceramic silicone rubber functional liquid.

7. The preparation method of the high flame-retardant and fire-resistant cable filling rope according to claim 6, wherein the surface roughening treatment specifically comprises the following steps: and D obtained in the step S5 is coiled on the coiled head, the coiled head is uncoiled on an uncoiling frame, and the D is subjected to surface roughening treatment by using a pair of surface roughening rollers during uncoiling, wherein the rotating speed of the surface roughening rollers is greater than the uncoiling speed, and the surface roughening rollers are 150-250-mesh chromium-plated rollers.

8. The preparation method of the high flame-retardant and fire-resistant cable filling rope according to claim 1, wherein the ceramic silicone rubber functional liquid in the step S7 comprises the following components in parts by mass: 300-400 parts of nanobelt toughened ceramic powder, 100-150 parts of antimony flame retardant, 250-300 parts of ethyl ester, 100-150 parts of silica gel, 0.5-1 part of molybdenum disilicide and 0.5-1 part of chromium disilicide.

9. The method for preparing the filling rope for the high flame-retardant and fire-resistant cable according to claim 1, wherein the preparation of the filling rope in the step S8 is specifically as follows: when the filling rope with the specification of phi 1-6mm is prepared, 1 or more F prepared in the step S6 are doubled and twisted into a round shape; when the filling rope with the specification of phi 6-10mm is prepared, a plurality of F strands prepared in the step S6 are taken and twisted into a round shape in a doubling and twisting mode; when the filling rope with the specification of phi 10-20mm is prepared, a plurality of F prepared in the step S6 are naturally stranded, and then the outside of the F is wound with the S-shaped wrapped terylene flame retardant yarn.

10. A high flame-retardant fire-resistant cable-filling rope prepared by the preparation method of any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of cable manufacturing, in particular to a high-flame-retardant fire-resistant cable filling rope and a preparation method thereof.

Background

The cable industry has become the second largest industry in the mechanical industry, second only to the automotive industry. The production value of the cable in 2020 has been about 15000 trillion yuan, and the flame-retardant cable fire-resistant cable accounts for about 50 percent of the cable. The annual demand of the flame-retardant fire-resistant cable 2020 reaches approximately 5 billion yuan, and the annual consumption of the cable core filling rope in the necessary flame-retardant fire-resistant cable reaches more than 5 ten thousand tons, and still increases by about 10%.

At present, the filling ropes used for the flame-retardant and fire-resistant cables in the market are various, and domestic similar products have uneven performances and poor stability and environmental protection. The filling ropes commonly used in the domestic flame-retardant filling rope at present comprise a glass fiber filling rope, a rock wool filling rope, a flame-retardant polypropylene tearing net filling rope, a flame-retardant polyester cotton yarn filling rope, a flame-retardant cotton yarn filling rope and a ceramic siliconized rubber filling rope, wherein only the ceramic siliconized rubber filling rope can achieve better fire resistance, but has high price, large specific gravity, flame-retardant oxygen index less than 30 percent and poor flame-retardant property. In addition, the environment-friendly performance of filling the glass fiber filling rope, the rock wool filling rope and the flame-retardant polypropylene tearing net filling rope is poor, the radiation resistance is poor, and the glass fiber filling rope, the rock wool filling rope and the flame-retardant polypropylene tearing net filling rope cannot be applied to nuclear-grade cables. The flame-retardant polyester cotton yarn filling rope and the flame-retardant cotton yarn filling rope have the flame-retardant oxygen index less than 30 percent and poor flame-retardant performance.

Therefore, a multi-performance filling material integrating oxidation resistance, radiation resistance, long service life, flame retardance and fire resistance is not available in the market at present, and the requirements of long service life, high flame retardance and radiation resistance of cables such as nuclear power cables, high-speed rails and the like running in the world in China are difficult to meet.

Disclosure of Invention

The invention aims to provide a high-flame-retardant fire-resistant cable filling rope and a preparation method thereof, the filling rope has excellent oxidation resistance, radiation resistance, long service life, flame retardance and fire resistance, and each performance index can meet the requirement of high-performance fire-resistant cable development at a high speed.

In order to achieve the above object, the first aspect of the present invention discloses a method for preparing a high flame-retardant fire-resistant cable filling rope, comprising the following steps:

a preparation method of a high-flame-retardant fire-resistant cable filling rope comprises the following steps:

s1, making yarns by using the raw materials;

s2, soaking the yarn manufactured in the S1 in flame retardant liquid, and removing redundant flame retardant liquid in the yarn after the yarn is taken out to obtain A;

s3, coating the surface A obtained in the step S2 with flame retardant glue, compacting the surface A with flame retardant glue after coating is finished, and removing redundant flame retardant glue to obtain a product B;

s4, spraying flame-retardant dry powder on the surface B obtained in the step S3 to obtain C;

s5, coating the surface C obtained in the step S4 with flame retardant glue, after coating, compacting the surface C with flame retardant glue, removing redundant flame retardant glue, and then drying to obtain D;

s6, coating the surface D obtained in S5 with a ceramic silicon rubber functional liquid, after coating, scraping the surface E with the ceramic silicon rubber functional liquid uniformly, and then drying to obtain E;

s7 preparing filling rope from one or more E obtained from S6.

By adopting the scheme, the yarns are used as the base materials, and are firstly soaked in the flame retardant liquid, so that the flame retardant liquid can fully permeate into fibers in the yarns, the problems that the interior of the existing like products has no flame retardant characteristic and the like products can be combusted again in the yarns after being combusted outside are solved, and the flame retardant characteristic of the products from inside to outside is improved; then, coating flame-retardant glue for the first time, wherein the flame-retardant glue exists as a flame-retardant layer, and meanwhile, the flame-retardant liquid which is easy to absorb moisture and regain moisture inside can be isolated from outside air, so that the flame retardance of the yarn can be kept; then, spraying flame-retardant dry powder on the surface by using the viscosity of the flame-retardant adhesive, wherein the flame-retardant dry powder forms another flame-retardant layer; then coating flame-retardant glue on the surface of the flame-retardant dry powder for the second time, and drying to seal the flame-retardant dry powder to form another flame-retardant layer, so that the flame-retardant dry powder is effectively prevented from falling off, falling off and flying; and finally, coating ceramic silicon rubber functional liquid on the surface of the flame-retardant rubber coated for the second time to increase the fire resistance.

The whole filling rope is of a multilayer structure, so that the flame-retardant property of the product from inside to outside is ensured, and the flame-retardant and fire-resistant properties and the service life of the filling rope are improved under the synergistic action of the flame-retardant layers and the fire resistance outside.

On the basis of the technical scheme, the invention can be further improved as follows:

further, the raw material in the S1 is cotton, the yarn number of the S1 is 2-3, and the specific manufacturing method of the yarn comprises the following steps:

s11, crushing the raw materials into small and long crushed materials by a high-speed tearing crusher, and processing the crushed materials by a coarse opener to obtain fibrous short filaments;

s12, processing the fibrous short filaments obtained in the step S11 by a large-bin cotton mixing machine to obtain fluffy fibers;

s13, further processing the fluffy fibers obtained in the step S12 by a fine opener, then collecting by an air pressure cotton box and carding by a carding machine to obtain a reticular fiber layer, and then manufacturing by adopting an air spinning process.

By adopting the scheme, the raw materials of the yarn can adopt waste clothes, cotton and the like, so that the problem of recycling a large amount of waste clothes, cotton quilts and other wastes in the market is solved; after the raw materials are smashed by a high-speed tearing crusher, the raw materials are subjected to rough opening, fluffy of a cotton mixer, fine opening, carding and air spinning in sequence to form fibers rapidly, and the fiber forming qualification rate is high.

Further, the flame retardant liquid in the S2 is a phosphorus-nitrogen water-based flame retardant liquid with the mass concentration of 15-25%.

Further, the flame retardant glue in S3 and S5 comprises the following components in parts by mass: 7-8 parts of a flame retardant and 2-3 parts of an emulsion, wherein the flame retardant is magnesium hydroxide or a mixture of the magnesium hydroxide and the magnesium hydroxide, and the emulsion is an acrylic emulsion or an ethyl acetate copolymer emulsion.

Further, the flame-retardant dry powder in the S4 is magnesium hydroxide powder or aluminum hydroxide powder, and the mesh number of the flame-retardant dry powder is 1000-5000 meshes.

By adopting the scheme, the density of the flame-retardant dry powder is reduced and the flame-retardant performance is influenced due to the excessively small mesh number; too large a mesh would result in too high a cost.

Further, the D obtained in S5 in S6 is subjected to surface roughening treatment before being coated with the ceramming silicone rubber functional liquid.

By adopting the scheme, the surface roughening treatment is carried out before the ceramic silicon rubber functional liquid is coated, so that a roughened surface is formed on the surface of the flame-retardant rubber, the adsorption capacity of the ceramic silicon rubber functional liquid can be effectively improved, and the fire resistance is improved.

Further, the surface sanding treatment specifically comprises: and D obtained in the step S5 is coiled on the coiled head, the coiled head is uncoiled on an uncoiling frame, and the D is subjected to surface roughening treatment by using a pair of surface roughening rollers during uncoiling, wherein the rotating speed of the surface roughening rollers is greater than the uncoiling speed, and the surface roughening rollers are 150-250-mesh chromium-plated rollers.

By adopting the above scheme, the upper and lower surface sanding rollers all adopt the chrome plating roller, and the rotational speed is greater than the yarn functioning speed, makes fire-retardant glue film surface have mixed and disorderly mar phenomenon, is convenient for increase the coating adsorption capacity when next process.

Further, the ceramic silicone rubber functional liquid in the step S7 includes the following components in parts by mass: 300-400 parts of nanobelt toughened ceramic powder, 100-150 parts of antimony flame retardant, 250-300 parts of ethyl ester, 100-150 parts of silica gel, 0.5-1 part of molybdenum disilicide and 0.5-1 part of chromium disilicide.

By adopting the scheme, the nanobelt toughened ceramic powder improves the fire resistance, and the antimony flame retardant improves the outer-layer flame resistance; molybdenum disilicide and chromium disilicide are added, the molybdenum disilicide and chromium disilicide react with oxygen at high temperature to generate silicon oxide glass and molybdenum and chromium oxides, and the molybdenum and chromium oxides are mixed in the silicon dioxide glass to play the roles of increasing the fluidity and stabilizing the glass state, so that the coated surface has the function of an oxidation resistant layer self-locking structure, the stability of flame retardance and tensile strength of the product in a high-temperature irradiation environment is improved, and the defects that the existing like products are poor in irradiation resistance and easy to oxidize on the surface are overcome.

Further, the preparation of the filling rope in the step S8 specifically includes: when the filling rope with the specification of phi 1-6mm is prepared, 1 or more F prepared in the step S6 are doubled and twisted into a round shape; when the filling rope with the specification of phi 6-10mm is prepared, a plurality of F strands prepared in the step S6 are taken and twisted into a round shape in a doubling and twisting mode; when the filling rope with the specification of phi 10-20mm is prepared, a plurality of F prepared in the step S6 are naturally stranded, and then the outside of the F is wound with the S-shaped wrapped terylene flame retardant yarn.

By adopting the above scheme, the filling rope selects different rope making modes according to different specifications, the small-caliber filling rope is directly twisted in parallel, the middle caliber adopts a hinge twisting process, the large-caliber flame-retardant polyester yarn is additionally used as a binding belt to be S-shaped bound, the tightness and the roundness of the filling rope are ensured, the effects of light specific gravity and round filling are achieved, and the defects that the traditional process needs to adopt different outer diameters to form bundles for twisting, and the defects of labor and time consumption and poor efficiency are overcome.

The invention also discloses a high-flame-retardant fire-resistant cable filling rope prepared by the preparation method.

Compared with the prior art, the invention has the beneficial effects that:

1. the filling rope adopts the yarns as the base materials, ensures that the elongation of the filling rope is more than 15 percent, can avoid fracture under different working conditions, and effectively prolongs the service life of the filling rope;

2. the filling rope yarn is soaked in the flame-retardant liquid, the flame-retardant liquid can fully permeate into fibers in the yarn, the problems that the existing like products have no flame-retardant characteristic and the like products can be combusted again in the yarn after being combusted outside are solved, the flame-retardant characteristic of the product from inside to outside is improved, then the first layer of flame-retardant glue is coated, the flame-retardant glue exists as a flame-retardant layer, and meanwhile, the flame-retardant liquid which is easy to absorb moisture and regain moisture in the yarn can be isolated from the outside air, so that the flame retardance of the yarn can be kept; after the first layer of flame-retardant glue is coated, flame-retardant dry powder is sprayed on the surface by using the viscosity of the flame-retardant glue, the flame-retardant dry powder forms another flame-retardant layer, the flame-retardant glue is coated on the surface of the flame-retardant dry powder for the second time, and the flame-retardant dry powder is sealed by drying to form another flame-retardant layer, so that the flame-retardant dry powder is effectively prevented from falling off, falling off and flying; finally, ceramic silicon rubber functional liquid is coated on the filling rope, so that the fire resistance is increased, the filling rope has a four-layer flame-retardant structure comprising flame-retardant liquid in the yarn and an external flame-retardant structure, the oxygen index is more than 60%, the filling rope does not crack at 950 ℃ for 4 hours, and the filling rope has excellent flame-retardant performance and fire resistance;

3. the ceramic silicon rubber functional liquid coated on the outermost part of the filling rope contains molybdenum disilicide and chromium disilicide, the molybdenum disilicide and the chromium disilicide react with oxygen at high temperature to generate silicon oxide glass and molybdenum and chromium oxides, and the molybdenum and chromium oxides are mixed in the silicon oxide glass to play roles in increasing fluidity and stabilizing glass state, so that the coated surface has the function of an oxidation resistant layer self-locking structure, the stability of flame retardance and tensile strength of the product in a high-temperature irradiation environment is improved, and the defects that the existing like products are poor in irradiation resistance and easy to oxidize on the surface are overcome;

4. the filling rope is coated with the ceramic silicon rubber functional liquid for surface roughening treatment, so that the adsorption capacity of the ceramic silicon rubber functional liquid can be effectively improved, and the fire resistance is improved;

5. the filling rope disclosed by the invention adopts a multi-layer flame-retardant structure and an outermost layer fireproof structure, is free of moisture absorption, has a water content of less than 1%, can adapt to different working condition requirements, and effectively prolongs the service life.

6. The filling rope provided by the invention adopts different rope manufacturing processes aiming at products with different diameters and specifications, so that the tightness and the roundness of the filling rope are ensured.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

The first embodiment is as follows:

the embodiment discloses a high-flame-retardant fire-resistant cable filling rope which is prepared by the following steps:

s1 yarn is prepared by using waste cotton-padded clothes as raw materials, which comprises the following steps:

s11, crushing the raw materials into small and long crushed materials by a high-speed tearing crusher, and processing the crushed materials by a coarse opener to obtain fibrous short filaments;

s12, processing the fibrous short filaments obtained in the step S11 by a large-bin cotton mixing machine to obtain fluffy fibers;

s13, further processing the fluffy fibers obtained in the step S12 by using a fine opener, then collecting by using an air pressure cotton box and carding by using a carding machine to obtain a reticular fiber layer, and then manufacturing by using an air spinning process to obtain the fluffy fiber;

s2, dipping the yarn manufactured in the S1 into flame retardant liquid, taking out the yarn, and then extruding the yarn by using a compression roller to remove redundant flame retardant liquid in the yarn to obtain A, wherein the flame retardant liquid is phosphorus-nitrogen water-based flame retardant liquid with the mass concentration of 15%;

s3, dipping the A obtained in S2 in flame-retardant glue, taking out the glue, pressing the surface flame-retardant glue by using a press roll, and removing redundant flame-retardant glue to obtain B, wherein the flame-retardant glue comprises the following components in parts by mass: 7 parts of magnesium hydroxide and 3 parts of acrylic emulsion;

s4, spraying flame-retardant dry powder on the surface B obtained in the step S3 to obtain a powder C, wherein the flame-retardant dry powder is 1000-mesh magnesium hydroxide powder;

s5, dipping the C obtained in the step S4 in flame-retardant glue, taking out the C, pressing the surface flame-retardant glue by using a press roll, removing redundant flame-retardant glue, putting the C into an oven, and drying the C at 150 ℃ to obtain D, wherein the flame-retardant glue comprises the following components in parts by mass: 7 parts of magnesium hydroxide and 3 parts of acrylic emulsion;

s6, coating the surface D obtained in S5 with a ceramic silicon rubber functional liquid, scraping the surface E with the ceramic silicon rubber functional liquid after coating, and drying at 150 ℃ to obtain E, wherein the ceramic silicon rubber functional liquid comprises the following components in parts by mass: 300 parts of nanobelt toughened ceramic powder, 150 parts of antimony flame retardant, 250 parts of ethyl ester, 150 parts of silica gel, 1 part of molybdenum disilicide and 0.5 part of chromium disilicide;

s7 taking two E obtained in S6, directly stranding and twisting to obtain the high-flame-retardant fire-resistant cable filling rope with the diameter of 2 mm.

Example two:

the embodiment discloses a high-flame-retardant fire-resistant cable filling rope which is prepared by the following steps:

s1 yarn is prepared by using waste cotton-padded clothes as raw materials, which comprises the following steps:

s11, crushing the raw materials into small and long crushed materials by a high-speed tearing crusher, and processing the crushed materials by a coarse opener to obtain fibrous short filaments;

s12, processing the fibrous short filaments obtained in the step S11 by a large-bin cotton mixing machine to obtain fluffy fibers;

s13, further processing the fluffy fibers obtained in the step S12 by using a fine opener, then collecting by using an air pressure cotton box and carding by using a carding machine to obtain a reticular fiber layer, and then manufacturing by using an air spinning process to obtain the fluffy fiber;

s2, dipping the yarn manufactured in the S1 into flame retardant liquid, taking out the yarn, and then extruding the yarn by using a compression roller to remove redundant flame retardant liquid in the yarn to obtain A, wherein the flame retardant liquid is 25% phosphorus-nitrogen water-based flame retardant liquid in mass concentration;

s3, dipping the A obtained in S2 in flame-retardant glue, taking out the glue, pressing the surface flame-retardant glue by using a press roll, and removing redundant flame-retardant glue to obtain B, wherein the flame-retardant glue comprises the following components in parts by mass: 5 parts of magnesium hydroxide, 3 parts of aluminum hydroxide and 2 parts of acrylic emulsion;

s4, spraying flame-retardant dry powder on the surface B obtained in the step S3 to obtain a powder C, wherein the flame-retardant dry powder is 4000-mesh aluminum hydroxide powder;

s5, dipping the C obtained in the step S4 in flame-retardant glue, taking out the C, pressing the surface flame-retardant glue by using a press roll, removing redundant flame-retardant glue, putting the C into an oven, and drying the C at 150 ℃ to obtain D, wherein the flame-retardant glue comprises the following components in parts by mass: 5 parts of magnesium hydroxide, 3 parts of aluminum hydroxide and 2 parts of acrylic emulsion;

s6, coating the surface D obtained in S5 with a ceramic silicon rubber functional liquid, scraping the surface E with the ceramic silicon rubber functional liquid after coating, and drying at 150 ℃ to obtain E, wherein the ceramic silicon rubber functional liquid comprises the following components in parts by mass: 400 parts of nanobelt toughened ceramic powder, 100 parts of antimony flame retardant, 300 parts of ethyl ester, 100 parts of silica gel, 0.5 part of molybdenum disilicide and 1 part of chromium disilicide;

s7 taking ten E obtained in S6, and stranding and twisting the E to obtain the high-flame-retardant fire-resistant cable filling rope with the diameter of 8 mm.

Example three:

the embodiment discloses a high-flame-retardant fire-resistant cable filling rope which is prepared by the following steps:

s1 yarn is prepared by using waste cotton-padded clothes as raw materials, which comprises the following steps:

s11, crushing the raw materials into small and long crushed materials by a high-speed tearing crusher, and processing the crushed materials by a coarse opener to obtain fibrous short filaments;

s12, processing the fibrous short filaments obtained in the step S11 by a large-bin cotton mixing machine to obtain fluffy fibers;

s13, further processing the fluffy fibers obtained in the step S12 by using a fine opener, then collecting by using an air pressure cotton box and carding by using a carding machine to obtain a reticular fiber layer, and then manufacturing by using an air spinning process to obtain the fluffy fiber;

s2, dipping the yarn manufactured in the S1 into flame retardant liquid, taking out the yarn, and then extruding the yarn by using a compression roller to remove redundant flame retardant liquid in the yarn to obtain A, wherein the flame retardant liquid is phosphorus-nitrogen water-based flame retardant liquid with the mass concentration of 20%;

s3, dipping the A obtained in S2 in flame-retardant glue, taking out the glue, pressing the surface flame-retardant glue by using a press roll, and removing redundant flame-retardant glue to obtain B, wherein the flame-retardant glue comprises the following components in parts by mass: 8 parts of magnesium hydroxide and 2 parts of acrylic emulsion;

s4, spraying flame-retardant dry powder on the surface B obtained in the step S3 to obtain a powder C, wherein the flame-retardant dry powder is 5000-mesh magnesium hydroxide powder;

s5, dipping the C obtained in the step S4 in flame-retardant glue, taking out the C, pressing the surface flame-retardant glue by using a press roll, removing redundant flame-retardant glue, putting the C into an oven, and drying the C at 150 ℃ to obtain D, wherein the flame-retardant glue comprises the following components in parts by mass: 8 parts of aluminum hydroxide and 2 parts of acrylic emulsion;

s6, coating the surface D obtained in S5 with a ceramic silicon rubber functional liquid, scraping the surface E with the ceramic silicon rubber functional liquid after coating, and drying at 150 ℃ to obtain E, wherein the ceramic silicon rubber functional liquid comprises the following components in parts by mass: 380 parts of nanobelt toughened ceramic powder, 120 parts of antimony flame retardant, 280 parts of ethyl ester, 120 parts of silica gel, 1 part of molybdenum disilicide and 1 part of chromium disilicide;

s7 taking 16E obtained from S6, naturally stranding, and winding the terylene flame-retardant yarn in an S shape on the outside to obtain the filling rope with the diameter of 12 mm.

Example of effects:

and (4) carrying out performance detection on the filling rope obtained in the second embodiment to obtain a table I.

The performance of the 2mm diameter cord obtained in example one was tested and compared with the performance of different types of 2mm cords of the prior art to obtain table two.

Table one embodiment two performance tests

TABLE II example one compares the Performance of the prior art fill rope

As shown in the table I, the filler rope of the second example adopts four layers of flame retardant structures including the internal flame retardant liquid and the outermost flame retardant layer, so that the oxygen index is greater than 60%, the surface of the filler rope does not crack when the fire resistance reaches 950 ℃ for 4 hours, and the filler rope has good flame retardant property and fire resistance.

The filling rope in the second embodiment adopts the waste cotton-padded clothes as the raw material, does not contain halogen integrally, has low cost and good environmental protection, and meets the ROHS standard.

The filling rope of the second embodiment adopts the yarns as the base materials, has higher elongation rate which is more than 15 percent, can avoid fracture under the use working conditions of bending and the like, and effectively prolongs the service life.

In the inside yarn flooding fire-retardant liquid of filling rope of embodiment two, the outside is wrapped up by three layers of fire-retardant layers and one deck flame retardant coating, and the moisture content is extremely low to no hygroscopicity can adapt to different operating mode demands, effectively improves life.

As shown in table two, compared with the same specification filling rope in the prior art, the filling rope in the first embodiment has the advantages of small gram weight difference, good environmental protection property, and good flame retardant property, fire resistance and elongation property, and can simultaneously have good flame retardant property, fire resistance and elongation property.

The filling rope in the first embodiment adopts two yarns as base materials, and the filling rope is directly twisted into a round shape and has good rounding rate.

In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.