阅读说明：本技术 一种抗冲击绝缘光缆及其制备方法 (Impact-resistant insulated optical cable and preparation method thereof ) 是由 丁建武 刘进辉 于 2021-10-18 设计创作，主要内容包括：本发明公开了一种抗冲击绝缘光缆及其制备方法,所述绝缘光缆由内部光纤和外部保护套制备而成,所述保护套各组分原料如下,按重量份数计,包括,高密度聚乙烯70-80份、乙烯基三乙氧基硅烷1.8-2.4份、二月桂酸二丁基锡3-5份、交联剂0.36-0.48份、抗氧化剂1-2份、2-硫醇基苯咪唑锌1-2份、抗静电剂2-3份、阻燃剂0.2-0.3份、染料0.2-0.3份。聚乙烯具有优异的耐化学性、机械性能和电绝缘性,因此本申请使用聚乙烯为基料制备光缆外部的保护套能够增加产品的机械性能和耐化学性能。并且本申请加入了抗氧化剂、抗静电剂和阻燃剂,能够增加产品的抗氧化、抗静电和阻燃能力,进而增强产品的各方面性能的效果。(The invention discloses an impact-resistant insulated optical cable and a preparation method thereof, wherein the insulated optical cable is prepared from an internal optical fiber and an external protective sleeve, and the protective sleeve comprises, by weight, 70-80 parts of high-density polyethylene, 1.8-2.4 parts of vinyltriethoxysilane, 3-5 parts of dibutyltin dilaurate, 0.36-0.48 part of a cross-linking agent, 1-2 parts of an antioxidant, 1-2 parts of 2-mercaptobenzimidazole zinc, 2-3 parts of an antistatic agent, 0.2-0.3 part of a flame retardant and 0.2-0.3 part of a dye. Polyethylene has excellent chemical resistance, mechanical property and electrical insulation, so the application of the polyethylene as the base material for preparing the protective sleeve outside the optical cable can increase the mechanical property and the chemical resistance of the product. And this application has added antioxidant, antistatic agent and flame retardant, can increase the anti-oxidant, antistatic and fire retardant ability of product, and then the effect of reinforcing each aspect performance of product.)

1. An impact-resistant insulated optical cable, characterized in that: the insulated optical cable is prepared from an inner optical fiber and an outer protective sleeve;

the protective sleeve is formed by mixing grafted polyethylene and master batch polyethylene;

the grafted polyethylene comprises the following raw materials, by weight, 50-60 parts of high-density polyethylene, 1.8-2.4 parts of vinyl triethoxysilane, and 0.36-0.48 part of a cross-linking agent;

the master batch polyethylene comprises, by weight, 20-30 parts of high-density polyethylene, 3-5 parts of dibutyltin dilaurate, 1-2 parts of an antioxidant, 1-2 parts of 2-mercaptobenzimidazole zinc, 2-3 parts of an antistatic agent, 0.2-0.3 part of a flame retardant and 0.2-0.3 part of a dye.

2. An impact-resistant insulated optical cable according to claim 1, wherein: the cross-linking agent is dicumyl peroxide.

3. An impact-resistant insulated optical cable according to claim 1, wherein: the antioxidant is prepared from phenetidine, acetone, benzenesulfonic acid, triphenylphosphine, trichloroacetonitrile, 4-methylpyridine and phenethylamine.

4. An impact-resistant insulated optical cable according to claim 1, wherein: the mass ratio of the phenetidine, the acetone and the benzenesulfonic acid is 9-10:7-8: 1.

5. An impact-resistant insulated optical cable according to claim 1, wherein: the antistatic agent is a mixture of sodium dodecyl sulfonate and sodium dodecyl benzene sulfonate.

6. An impact-resistant insulated optical cable according to claim 1, wherein: the flame retardant is a mixture of ammonium polyphosphate, tricresyl phosphate and melamine cyanurate.

7. A preparation method of an impact-resistant insulated optical cable is characterized by comprising the following steps: the steps are as follows,

(1) preparation of antioxidant: refluxing and heating phenetidine and acetone, stirring, adding benzenesulfonic acid, heating, cooling after the reaction is finished, adding triphenylphosphine, dichloromethane and trichloroacetonitrile, stirring, adding phenethylamine and 4-methylpyridine, and stirring to obtain an antioxidant;

(2) preparing a protective sleeve:

firstly, mixing high-density polyethylene and vinyl triethoxysilane, adding a cross-linking agent, stirring, heating to a molten state for melt grafting, extruding and granulating to obtain grafted polyethylene;

heating high-density polyethylene to a molten state, adding dibutyltin dilaurate, an antioxidant, an antistatic agent, 2-mercaptobenzimidazole zinc, a dye and a flame retardant, stirring uniformly, and extruding and granulating to obtain master batch polyethylene;

mixing the master batch polyethylene and the grafted polyethylene, heating to a molten state, and extruding to obtain a protective sleeve;

(3) preparing an insulated optical cable: and putting the optical fiber into the protective sleeve to obtain the optical cable.

8. The method for preparing an impact-resistant insulated optical cable according to claim 7, wherein: the specific steps are as follows,

(1) preparation of antioxidant: refluxing and heating phenetidine and acetone, stirring, adding benzenesulfonic acid, heating at 157-159 ℃, cooling after the reaction is finished at 23-25 ℃, adding triphenylphosphine, dichloromethane and trichloroacetonitrile, stirring for 1-1.5h, adding phenethylamine and 4-methylpyridine, and stirring for 1-1.5h to obtain an antioxidant;

(2) preparing a protective sleeve:

firstly, mixing high-density polyethylene and vinyl triethoxysilane, adding a cross-linking agent, stirring, heating to a molten state for melt grafting, extruding and granulating to obtain grafted polyethylene;

heating high-density polyethylene to a molten state, adding dibutyltin dilaurate, an antioxidant, an antistatic agent, 2-mercaptobenzimidazole zinc, a dye and a flame retardant, stirring uniformly, and extruding and granulating to obtain master batch polyethylene;

mixing the master batch polyethylene and the grafted polyethylene, heating to a molten state, and extruding to obtain a protective sleeve;

(3) preparing an insulated optical cable: and putting the optical fiber into the protective sleeve to obtain the optical cable.

9. The method for preparing an impact-resistant insulated optical cable according to claim 8, wherein: in the step (1), the mass ratio of the added benzene ring acid to the p-phenetidine is 0.1: 20.

10. The method for preparing an impact-resistant insulated optical cable according to claim 8, wherein: in the step (2), the mass ratio of the master batch polyethylene to the grafted polyethylene is 8-9: 91-92.

Technical Field

The invention relates to the technical field of optical cable preparation, in particular to an impact-resistant insulated optical cable and a preparation method thereof.

Background

The common optical cable is composed of one or a plurality of optical fibers covered by a protective sleeve, and has wide application in the communication industry.

The outer protective sleeve of the optical cable can protect the optical fiber inside, prolong the service life of the optical cable and reduce the production and maintenance cost, the main raw material of the outer protective sleeve of the optical cable is resin, the polyethylene resin has certain chemical resistance, mechanical strength and insulativity, the protective sleeve prepared from the polyethylene resin has certain shock resistance and insulativity, but new requirements on the mechanical strength and the antioxidant performance of the optical cable are met along with the continuous improvement of the requirements of people, and therefore the invention of the shock-resistant insulated optical cable and the preparation method thereof is particularly important.

Disclosure of Invention

The invention aims to provide an impact-resistant insulated optical cable and a preparation method thereof, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme:

an impact-resistant insulated optical cable, characterized in that: the insulated optical cable is prepared from an inner optical fiber and an outer protective sleeve;

the protective sleeve is formed by mixing grafted polyethylene and master batch polyethylene;

the grafted polyethylene comprises the following raw materials, by weight, 50-60 parts of high-density polyethylene, 1.8-2.4 parts of vinyl triethoxysilane, and 0.36-0.48 part of a cross-linking agent;

the master batch polyethylene comprises, by weight, 20-30 parts of high-density polyethylene, 3-5 parts of dibutyltin dilaurate, 1-2 parts of an antioxidant, 1-2 parts of 2-mercaptobenzimidazole zinc, 2-3 parts of an antistatic agent, 0.2-0.3 part of a flame retardant and 0.2-0.3 part of a dye.

Further, the cross-linking agent is dicumyl peroxide.

Further, the antioxidant is prepared from phenetidine, acetone, benzenesulfonic acid, triphenylphosphine, trichloroacetonitrile, 4-methylpyridine and phenethylamine;

furthermore, the mass ratio of the phenetidine, the acetone and the benzenesulfonic acid is 9-10:7-8: 1.

Further, the antistatic agent is a mixture of sodium dodecyl sulfonate and sodium dodecyl benzene sulfonate.

Further, the flame retardant is a mixture of ammonium polyphosphate, tricresyl phosphate and melamine cyanurate.

A preparation method of an impact-resistant insulated optical cable comprises the following steps,

(1) preparation of antioxidant: reflux-heating phenetidine and acetone, stirring, adding benzenesulfonic acid, heating, cooling after the reaction is finished, adding triphenylphosphine, dichloromethane and trichloroacetonitrile, stirring, adding phenethylamine and 4-methylpyridine, and stirring to obtain antioxidant

The application uses the phenetidine and acetone for reaction, and the quinoline antioxidant can be obtained by using a reactor provided with a reflux device for reaction, and the application also adds the 2-thiol benzimidazole zinc for matching use with the quinoline antioxidant because the polyethylene used in the application needs to be crosslinked by using high-density polyethylene and silane compounds, and the addition of the antioxidant can influence the crosslinking effect because of the self property of the antioxidant, and can inhibit free radicals, such as diphenylamine antioxidants, which can generate the inhibition effect on curing, and the quinoline antioxidant used in the application has the lowest influence degree on the crosslinking reaction, and also adds the 2-thiol benzimidazole zinc for matching use, so that the oxidation resistance can be increased, and the crosslinking can be promoted, thereby increasing the mechanical strength and oxidation resistance of the product.

The preparation method needs to control the ratio of the raw materials to each other to a certain extent, the mass ratio of the phenetidine, the acetone and the benzenesulfonic acid is controlled to be 9-10:7-8:1, and the reactor used in the method is provided with reflux equipment, so that high yield can be ensured.

According to the application, benzenesulfonic acid is added to be used as a catalyst when a quinoline antioxidant is prepared, and the benzenesulfonic acid can not be consumed in the reaction, so that triphenylphosphine is added to treat the benzenesulfonic acid, N-butyl benzene cyclic amide can be generated, the tensile strength of a product can be increased, the added triphenylphosphine can also increase the glossiness of the product, the product is more attractive, and the 4-methylpyridine can promote the formation of crosslinked polyethylene, the reaction condition of the application is relatively mild, the reaction can be carried out at 23-25 ℃, higher temperature is not required, and the consumption of energy is reduced.

(2) Preparing a protective sleeve:

firstly, mixing high-density polyethylene and vinyl triethoxysilane, adding a cross-linking agent, stirring, heating to a molten state for melt grafting, extruding and granulating to obtain grafted polyethylene;

heating high-density polyethylene to a molten state, adding dibutyltin dilaurate, an antioxidant, an antistatic agent, 2-mercaptobenzimidazole zinc, a dye and a flame retardant, stirring uniformly, and extruding and granulating to obtain master batch polyethylene;

mixing the master batch polyethylene and the grafted polyethylene, heating to a molten state, and extruding to obtain a protective sleeve;

(3) preparing an insulated optical cable: and putting the optical fiber into the protective sleeve to obtain the optical cable.

Further, the concrete steps are as follows,

(1) preparation of antioxidant: refluxing and heating phenetidine and acetone, stirring, adding benzenesulfonic acid, heating at 157-159 ℃, cooling after the reaction is finished, adding triphenylphosphine, dichloromethane and trichloroacetonitrile, stirring for 1-1.5h, adding phenethylamine and 4-methylpyridine, and stirring for 1-1.5h to obtain an antioxidant;

(2) preparing a protective sleeve:

firstly, mixing high-density polyethylene and vinyl triethoxysilane, adding a cross-linking agent, stirring, heating to a molten state for melt grafting, extruding and granulating to obtain grafted polyethylene;

heating high-density polyethylene to a molten state, adding dibutyltin dilaurate, an antioxidant, an antistatic agent, 2-mercaptobenzimidazole zinc, a dye and a flame retardant, stirring uniformly, and extruding and granulating to obtain master batch polyethylene;

mixing the master batch polyethylene and the grafted polyethylene, heating to a molten state, and extruding to obtain a protective sleeve;

(3) preparing an insulated optical cable: and putting the optical fiber into the protective sleeve to obtain the optical cable.

Further, in the step (1), the mass ratio of the added benzene ring acid to the p-phenetidine is 0.1: 20.

Further, in the step (2), the mass ratio of the master batch polyethylene to the grafted polyethylene is 8-9: 91-92.

The mass ratio of the master batch polyethylene to the grafted polyethylene is limited, the mass ratio is enabled to be optimal in the range of 8-9:91-92, and the cost can be reduced on the basis of ensuring the maximum tensile strength and oxidation resistance.

Compared with the prior art, the invention has the following beneficial effects: polyethylene has excellent chemical resistance, mechanical property and electrical insulation, so the application of the polyethylene as the base material for preparing the protective sleeve outside the optical cable can increase the mechanical property and the chemical resistance of the product. And this application has added antioxidant, antistatic agent and flame retardant, can increase the anti-oxidant, antistatic and fire retardant ability of product, and then strengthen all aspects performance of product.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

An impact-resistant insulated optical cable prepared from an inner optical fiber and an outer protective sheath;

the protective sleeve is formed by mixing grafted polyethylene and master batch polyethylene;

the grafted polyethylene comprises the following raw materials, by weight, 50 parts of high-density polyethylene, 1.8 parts of vinyl triethoxysilane and 0.36 part of cross-linking agent;

the master batch polyethylene comprises the following raw materials, by weight, 20 parts of high-density polyethylene, 3 parts of dibutyltin dilaurate, 1 part of antioxidant, 1 part of 2-mercaptobenzimidazole zinc, 2 parts of antistatic agent, 0.2 part of flame retardant and 0.2 part of dye.

The cross-linking agent is dicumyl peroxide.

The antioxidant is prepared from phenetidine, acetone, benzenesulfonic acid, triphenylphosphine, trichloroacetonitrile, 4-methylpyridine and phenethylamine;

the mass ratio of the phenetidine, the acetone and the benzenesulfonic acid is 9:7: 1.

The antistatic agent is a mixture of sodium dodecyl sulfonate and sodium dodecyl benzene sulfonate.

The flame retardant is a mixture of ammonium polyphosphate, tricresyl phosphate and melamine cyanurate.

A preparation method of an impact-resistant insulated optical cable comprises the following steps,

(1) preparation of antioxidant: refluxing and heating phenetidine and acetone, stirring, adding benzenesulfonic acid, heating to 157 ℃, cooling after the reaction is finished to 23 ℃, adding triphenylphosphine, dichloromethane and trichloroacetonitrile, stirring for 1h, adding phenethylamine and 4-methylpyridine, and stirring for 1h to obtain an antioxidant, wherein the mass ratio of added benzene ring acid to phenetidine is 0.1: 20;

(2) preparing a protective sleeve:

firstly, mixing high-density polyethylene and vinyl triethoxysilane, adding a cross-linking agent, stirring, heating to a molten state for melt grafting, extruding and granulating to obtain grafted polyethylene;

heating high-density polyethylene to a molten state, adding dibutyltin dilaurate, an antioxidant, an antistatic agent, 2-mercaptobenzimidazole zinc, a dye and a flame retardant, stirring uniformly, and extruding and granulating to obtain master batch polyethylene;

thirdly, mixing the master batch polyethylene and the grafted polyethylene, wherein the mass ratio of the master batch polyethylene to the grafted polyethylene is 8:91, heating to a molten state, and extruding to obtain a protective sleeve;

(3) preparing an insulated optical cable: and putting the optical fiber into the protective sleeve to obtain the optical cable.

Example 2

An impact-resistant insulated optical cable prepared from an inner optical fiber and an outer protective sheath;

the protective sleeve is formed by mixing grafted polyethylene and master batch polyethylene;

the grafted polyethylene comprises the following raw materials, by weight, 55 parts of high-density polyethylene, 2.1 parts of vinyl triethoxysilane and 0.4 part of cross-linking agent;

the master batch polyethylene comprises the following raw materials, by weight, 25 parts of high-density polyethylene, 4 parts of dibutyltin dilaurate, 1.5 parts of an antioxidant, 1.5 parts of 2-mercaptobenzimidazole zinc, 2.5 parts of an antistatic agent, 0.25 part of a flame retardant and 0.25 part of a dye.

The cross-linking agent is dicumyl peroxide.

The antioxidant is prepared from phenetidine, acetone, benzenesulfonic acid, triphenylphosphine, trichloroacetonitrile, 4-methylpyridine and phenethylamine;

the mass ratio of the phenetidine, the acetone and the benzenesulfonic acid is 9.5:7.5: 1.

The antistatic agent is a mixture of sodium dodecyl sulfonate and sodium dodecyl benzene sulfonate.

The flame retardant is a mixture of ammonium polyphosphate, tricresyl phosphate and melamine cyanurate.

A preparation method of an impact-resistant insulated optical cable comprises the following steps,

(1) preparation of antioxidant: refluxing and heating phenetidine and acetone, stirring, adding benzenesulfonic acid, wherein the mass ratio of added benzene ring acid to phenetidine is 0.1:20, heating to 158 ℃, cooling after the reaction is finished to 24 ℃, adding triphenylphosphine, dichloromethane and trichloroacetonitrile, stirring for 1.3h, adding phenethylamine and 4-methylpyridine, and stirring for 1.3h to obtain an antioxidant;

(2) preparing a protective sleeve:

firstly, mixing high-density polyethylene and vinyl triethoxysilane, adding a cross-linking agent, stirring, heating to a molten state for melt grafting, extruding and granulating to obtain grafted polyethylene;

heating high-density polyethylene to a molten state, adding dibutyltin dilaurate, an antioxidant, an antistatic agent, 2-mercaptobenzimidazole zinc, a dye and a flame retardant, stirring uniformly, and extruding and granulating to obtain master batch polyethylene;

thirdly, mixing the master batch polyethylene and the grafted polyethylene, heating the master batch polyethylene and the grafted polyethylene to a molten state according to the mass ratio of 8.5:91.5, and extruding to obtain a protective sleeve;

(3) preparing an insulated optical cable: and putting the optical fiber into the protective sleeve to obtain the optical cable.

Example 3

An impact-resistant insulated optical cable prepared from an inner optical fiber and an outer protective sheath;

the protective sleeve is formed by mixing grafted polyethylene and master batch polyethylene;

the grafted polyethylene comprises the following raw materials, by weight, 60 parts of high-density polyethylene, 2.4 parts of vinyl triethoxysilane and 0.48 part of a cross-linking agent;

the master batch polyethylene comprises the following raw materials, by weight, 30 parts of high-density polyethylene, 5 parts of dibutyltin dilaurate, 2 parts of an antioxidant, 2 parts of 2-mercaptobenzimidazole zinc, 3 parts of an antistatic agent, 0.3 part of a flame retardant and 0.3 part of a dye.

The cross-linking agent is dicumyl peroxide.

The antioxidant is prepared from phenetidine, acetone, benzenesulfonic acid, triphenylphosphine, trichloroacetonitrile, 4-methylpyridine and phenethylamine;

the mass ratio of the phenetidine, the acetone and the benzenesulfonic acid is 10:8: 1.

The antistatic agent is a mixture of sodium dodecyl sulfonate and sodium dodecyl benzene sulfonate.

The flame retardant is a mixture of ammonium polyphosphate, tricresyl phosphate and melamine cyanurate.

A preparation method of an impact-resistant insulated optical cable comprises the following steps,

(1) preparation of antioxidant: refluxing and heating phenetidine and acetone, stirring, adding benzenesulfonic acid, heating to 159 ℃, cooling after the reaction is finished to 25 ℃, adding triphenylphosphine, dichloromethane and trichloroacetonitrile, stirring for 1.5h, adding phenethylamine and 4-methylpyridine, and stirring for 1.5h to obtain an antioxidant, wherein the mass ratio of added benzene ring acid to phenetidine is 0.1: 20;

(2) preparing a protective sleeve:

firstly, mixing high-density polyethylene and vinyl triethoxysilane, adding a cross-linking agent, stirring, heating to a molten state for melt grafting, extruding and granulating to obtain grafted polyethylene;

heating high-density polyethylene to a molten state, adding dibutyltin dilaurate, an antioxidant, an antistatic agent, 2-mercaptobenzimidazole zinc, a dye and a flame retardant, stirring uniformly, and extruding and granulating to obtain master batch polyethylene;

thirdly, mixing the master batch polyethylene and the grafted polyethylene, heating the master batch polyethylene and the grafted polyethylene to a molten state according to the mass ratio of 9:92, and extruding to obtain a protective sleeve;

(3) preparing an insulated optical cable: and putting the optical fiber into the protective sleeve to obtain the optical cable.

Comparative example 1

An impact-resistant insulated optical cable prepared from an inner optical fiber and an outer protective sheath;

the protective sleeve is formed by mixing grafted polyethylene and master batch polyethylene;

the grafted polyethylene comprises the following raw materials, by weight, 60 parts of high-density polyethylene, 2.4 parts of vinyl triethoxysilane and 0.48 part of a cross-linking agent;

the master batch polyethylene comprises the following raw materials, by weight, 30 parts of high-density polyethylene, 5 parts of dibutyltin dilaurate, 2 parts of an antioxidant, 2 parts of 2-mercaptobenzimidazole zinc, 3 parts of an antistatic agent, 0.3 part of a flame retardant and 0.3 part of a dye.

The cross-linking agent is dicumyl peroxide.

The antioxidant is diphenylamine;

the mass ratio of the phenetidine, the acetone and the benzenesulfonic acid is 10:8: 1.

The antistatic agent is a mixture of sodium dodecyl sulfonate and sodium dodecyl benzene sulfonate.

The flame retardant is a mixture of ammonium polyphosphate, tricresyl phosphate and melamine cyanurate.

A preparation method of an impact-resistant insulated optical cable comprises the following steps,

(1) preparing a protective sleeve:

firstly, mixing high-density polyethylene and vinyl triethoxysilane, adding a cross-linking agent, stirring, heating to a molten state for melt grafting, extruding and granulating to obtain grafted polyethylene;

heating high-density polyethylene to a molten state, adding dibutyltin dilaurate, an antioxidant, an antistatic agent, 2-mercaptobenzimidazole zinc, a dye and a flame retardant, stirring uniformly, and extruding and granulating to obtain master batch polyethylene;

thirdly, mixing the master batch polyethylene and the grafted polyethylene, heating the master batch polyethylene and the grafted polyethylene to a molten state according to the mass ratio of 9:92, and extruding to obtain a protective sleeve;

(2) preparing an insulated optical cable: and putting the optical fiber into the protective sleeve to obtain the optical cable.

Comparative example 2

An impact-resistant insulated optical cable prepared from an inner optical fiber and an outer protective sheath;

the protective sleeve is formed by mixing grafted polyethylene and master batch polyethylene;

the grafted polyethylene comprises the following raw materials, by weight, 60 parts of high-density polyethylene, 2.4 parts of vinyl triethoxysilane and 0.48 part of a cross-linking agent;

the master batch polyethylene comprises the following raw materials, by weight, 30 parts of high-density polyethylene, 5 parts of dibutyltin dilaurate, 2 parts of an antioxidant, 2 parts of 2-mercaptobenzimidazole zinc, 3 parts of an antistatic agent, 0.3 part of a flame retardant and 0.3 part of a dye.

The cross-linking agent is dicumyl peroxide.

The antioxidant is prepared from phenetidine, acetone and benzenesulfonic acid;

the mass ratio of the phenetidine, the acetone and the benzenesulfonic acid is 10:8: 1.

The antistatic agent is a mixture of sodium dodecyl sulfonate and sodium dodecyl benzene sulfonate.

The flame retardant is a mixture of ammonium polyphosphate, tricresyl phosphate and melamine cyanurate.

A preparation method of an impact-resistant insulated optical cable comprises the following steps,

(1) preparation of antioxidant: refluxing and heating phenetidine and acetone, stirring, adding benzenesulfonic acid, and heating at 159 ℃ to obtain an antioxidant, wherein the mass ratio of added benzene ring acid to phenetidine is 0.1: 20;

(2) preparing a protective sleeve:

firstly, mixing high-density polyethylene and vinyl triethoxysilane, adding a cross-linking agent, stirring, heating to a molten state for melt grafting, extruding and granulating to obtain grafted polyethylene;

heating high-density polyethylene to a molten state, adding dibutyltin dilaurate, an antioxidant, an antistatic agent, 2-mercaptobenzimidazole zinc, a dye and a flame retardant, stirring uniformly, and extruding and granulating to obtain master batch polyethylene;

thirdly, mixing the master batch polyethylene and the grafted polyethylene, heating the master batch polyethylene and the grafted polyethylene to a molten state according to the mass ratio of 9:92, and extruding to obtain a protective sleeve;

(3) preparing an insulated optical cable: and putting the optical fiber into the protective sleeve to obtain the optical cable.

Comparative example 3

An impact-resistant insulated optical cable prepared from an inner optical fiber and an outer protective sheath;

the protective sleeve is formed by mixing grafted polyethylene and master batch polyethylene;

the grafted polyethylene comprises the following raw materials, by weight, 60 parts of high-density polyethylene, 2.4 parts of vinyl triethoxysilane and 0.48 part of a cross-linking agent;

the master batch polyethylene comprises the following raw materials, by weight, 30 parts of high-density polyethylene, 5 parts of dibutyltin dilaurate, 2 parts of an antioxidant, 2 parts of 2-mercaptobenzimidazole zinc, 3 parts of an antistatic agent, 0.3 part of a flame retardant and 0.3 part of a dye.

The cross-linking agent is dicumyl peroxide.

The antioxidant is prepared from phenetidine, acetone, benzenesulfonic acid, triphenylphosphine, trichloroacetonitrile, 4-methylpyridine and phenethylamine;

the mass ratio of the phenetidine, the acetone and the benzenesulfonic acid is 10:8: 1.

The antistatic agent is a mixture of sodium dodecyl sulfonate and sodium dodecyl benzene sulfonate.

The flame retardant is a mixture of ammonium polyphosphate, tricresyl phosphate and melamine cyanurate.

A preparation method of an impact-resistant insulated optical cable comprises the following steps,

(1) preparation of antioxidant: refluxing and heating phenetidine and acetone, stirring, adding benzenesulfonic acid, heating to 159 ℃, cooling after the reaction is finished to 25 ℃, adding triphenylphosphine, dichloromethane and trichloroacetonitrile, stirring for 1.5h, adding phenethylamine and 4-methylpyridine, and stirring for 1.5h to obtain an antioxidant, wherein the mass ratio of added benzene ring acid to phenetidine is 0.1: 20;

(2) preparing a protective sleeve:

firstly, mixing high-density polyethylene and vinyl triethoxysilane, adding a cross-linking agent, stirring, heating to a molten state for melt grafting, extruding and granulating to obtain grafted polyethylene;

heating high-density polyethylene to a molten state, adding dibutyltin dilaurate, an antioxidant, an antistatic agent, 2-mercaptobenzimidazole zinc, a dye and a flame retardant, stirring uniformly, and extruding and granulating to obtain master batch polyethylene;

mixing the master batch polyethylene and the grafted polyethylene with the mass ratio of 1:1, heating to a molten state, and extruding to obtain a protective sleeve;

(3) preparing an insulated optical cable: and putting the optical fiber into the protective sleeve to obtain the optical cable.

Experiment of

A control experiment was conducted by setting comparative example 1, comparative example 2, comparative example 3 and comparative example 4 with example 3 as a control, in which diphenylamine was used as the antioxidant in comparative example 1 and no quinoline antioxidant was used, benzenesulfonic acid was not treated in comparative example 2, and the mass ratio of the master batch polyethylene and the graft polyethylene in comparative example 3 was 1: 1.

The outer protective jacketing of example 1, example 2, example 3, comparative example 1, comparative example 2, comparative example 3 was subjected to tensile strength testing in accordance with GB/T1040-2006, with the following results,

experimental group

Example 1

Example 2

Example 3

Comparative example 1

Comparative example 2

Comparative example 3

Tensile strength

13.2MPa

13.5MPa

13.4MPa

11.3MPa

10.1MPa

10.8MPa

Watch 1

The outer protective jacketing of example 1, example 2, example 3, comparative example 1 was subjected to accelerated aging and tensile strength testing in accordance with GB/T1040-2006, with the following results,

watch two

In comparative example 1, diphenylamine was used as the antioxidant, and quinoline-based antioxidants were not used, and the antioxidant properties were not much different from those of examples 1, 2, and 3, but the tensile strength was much different from those of examples 1, 2, and 3 because diphenylamine had some inhibitory effect on curing.

In comparative example 2, benzene sulfonic acid is not treated, the boiling point of the benzene sulfonic acid is 137 ℃, and the benzene sulfonic acid can be removed by heating without treatment, but in examples 1, 2 and 3, the benzene sulfonic acid is removed by reaction, so that not only can raw materials be fully utilized, but also N-butyl benzene cyclic amide can be generated, and the tensile strength of the product can be increased.

The mass ratio of the masterbatch polyethylene to the grafted polyethylene in comparative example 3 was 1:1, and the tensile strength in comparative example 3 was not much different from those of examples 1, 2 and 3, but the cost was increased due to the excessive amount of the grafted polyethylene added.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Experimental group	Example 1	Example 2	Example 3	Comparative example 1
					Tensile strength	12.8	12.7	12.6	6.3