阅读说明：本技术 一种抗电痕聚乙烯护套料及制备方法 (Anti-electric-mark polyethylene sheath material and preparation method thereof ) 是由 张惠峰 于 2020-12-29 设计创作，主要内容包括：发明公开了一种抗电痕聚乙烯护套料及制备方法,聚乙烯护套料的技术领域,其技术方案要点是包括以下重量份数的原料：高密度聚乙烯40-60份、低密度聚乙烯10-20份、线性低密度聚乙烯20-40份、氢氧化镁30-50份、硼酸锌10-20份、蒙脱土10-20份、二氧化硅5-10份、云母5-10份、润滑剂1-2份、抗紫外剂3-5份、炭黑母粒1-5份,本发明通过调控聚乙烯分子的结构,以及分布特点,以及优化聚乙烯护套料加工工艺,提高了聚乙烯护套料的耐环境应力和开裂性,从而提高光缆的稳定性和长期寿命。(The invention discloses an anti-electric-mark polyethylene sheath material and a preparation method thereof, belonging to the technical field of polyethylene sheath materials, and the technical scheme is characterized by comprising the following raw materials in parts by weight: 40-60 parts of high-density polyethylene, 10-20 parts of low-density polyethylene, 20-40 parts of linear low-density polyethylene, 30-50 parts of magnesium hydroxide, 10-20 parts of zinc borate, 10-20 parts of montmorillonite, 5-10 parts of silicon dioxide, 5-10 parts of mica, 1-2 parts of lubricant, 3-5 parts of anti-ultraviolet agent and 1-5 parts of carbon black master batch.)

1. The anti-tracking polyethylene sheath material is characterized by comprising the following raw materials in parts by weight: 40-60 parts of high-density polyethylene, 10-20 parts of low-density polyethylene, 20-40 parts of linear low-density polyethylene, 30-50 parts of magnesium hydroxide, 10-20 parts of zinc borate, 10-20 parts of montmorillonite, 5-10 parts of silicon dioxide, 5-10 parts of mica, 1-2 parts of lubricant, 3-5 parts of anti-ultraviolet agent and 1-5 parts of carbon black master batch.

2. The tracking-resistant polyethylene sheath material according to claim 1, wherein: and a flame retardant is also added into the polyethylene sheath material.

3. The tracking-resistant polyethylene sheath material according to claim 1, wherein: among the anti-ultraviolet agentsThe main components are ZnO and CeO₂。

4. The tracking-resistant polyethylene sheath material according to claim 1, wherein: the lubricant is one or more of polyethylene wax, high-melting-point paraffin wax, calcium stearate, zinc stearate, lead stearate and higher saturated fatty alcohol.

5. The tracking-resistant polyethylene sheath material according to claim 1, wherein: the content of carbon black in the carbon black master batch is 30-50%.

6. The preparation method of the tracking-resistant polyethylene sheath material as claimed in claim 1, which comprises the following steps:

s1: adding 40-60 parts by mass of high-density polyethylene, 10-20 parts by mass of low-density polyethylene, 20-40 parts by mass of linear low-density polyethylene, 30-50 parts by mass of magnesium hydroxide, 10-20 parts by mass of zinc borate, 10-20 parts by mass of montmorillonite, 5-10 parts by mass of silicon dioxide, 5-10 parts by mass of mica, 1-2 parts by mass of a lubricant, 3-5 parts by mass of an anti-ultraviolet agent and 1-5 parts by mass of carbon black master batch into a kneading machine for blending;

s2: blending at normal temperature for 5-10min, adding 1-5 parts of flame retardant into a mixing roll, and performing mixing, initial plasticizing, final plasticizing, extruding and cooling;

s3: then tabletting, granulating, drying, weighing and packaging finished products.

7. The preparation method of the tracking-resistant polyethylene sheath material according to claim 6, characterized in that: the temperature of the initial plasticization is 120-130 ℃, the time is 5-10min, the temperature of the final plasticization is 125-135 ℃, and the time is 5-10 min.

8. The preparation method of the tracking-resistant polyethylene sheath material according to claim 6, characterized in that: the temperature sections in the extruder are a first section of 110-.

9. The preparation method of the tracking-resistant polyethylene sheath material according to claim 6, characterized in that: the tablet pressing adopts a flat vulcanizing instrument, the tablet pressing temperature is 150-155 ℃, the time is 10-15min, and the pressure is 10-12 MPa.

10. The preparation method of the tracking-resistant polyethylene sheath material according to claim 6, characterized in that: and the cooling adopts a water cooling mode.

Technical Field

The invention relates to the technical field of polyethylene sheath materials, in particular to an anti-electric-mark polyethylene sheath material and a preparation method thereof.

Background

In the cable industry, the protective effect of the sheath material on the optical cable is very important, because the cable is erected in a strong electric field environment of high-voltage power transmission, different electric potentials can be generated on the surface of the optical cable due to capacitive coupling between the optical cable and a high-voltage phase line and between the optical cable and the ground, leakage current can be caused on the surface of the wet and dirty optical cable due to potential difference, heat generated by the leakage current enables a part of a wet area on the surface of the optical cable to be evaporated to dryness, flying foxes and strong heat are generated due to instant interruption of the leakage current in an evaporation dry area, and the gradually accumulated heat can burn the surface of the optical cable to form dendritic marks, namely electric marks. Over time, the cable may be damaged where the cable is electrically scratched, thereby interfering with the use of the cable.

Polyethylene materials have been widely used in the sheathing materials of various optical and electrical communication cables since the 40 th century. Today, various jacket grade polyethylene resins, such as high density polyethylene, linear low density polyethylene, etc., provide unique and superior physical properties and applications for the design and application of fiber optic cables. With the development of optical communication technology and optical cable manufacturing technology, the performance of the jacket material is required to be improved continuously to meet the requirements of production and final use.

Disclosure of Invention

The invention aims to provide an anti-tracking polyethylene sheath material and a preparation method thereof, wherein the environmental stress resistance and the cracking resistance of the polyethylene sheath material are improved by regulating the structure and the distribution characteristics of polyethylene molecules and optimizing the processing technology of the polyethylene sheath material, so that the stability and the long-term service life of an optical cable are improved.

The technical purpose of the invention is realized by the following technical scheme:

an anti-tracking polyethylene sheath material comprises the following raw materials in parts by weight: 40-60 parts of high-density polyethylene, 10-20 parts of low-density polyethylene, 20-40 parts of linear low-density polyethylene, 30-50 parts of magnesium hydroxide, 10-20 parts of zinc borate, 10-20 parts of montmorillonite, 5-10 parts of silicon dioxide, 5-10 parts of mica, 1-2 parts of lubricant, 3-5 parts of anti-ultraviolet agent and 1-5 parts of carbon black master batch.

Further, a flame retardant is added into the polyethylene sheath material.

Further, the main components of the uvioresistant agent are ZnO and CeO 2.

Further, the lubricant is one or more of polyethylene wax, high-melting-point paraffin wax, calcium stearate, zinc stearate, lead stearate and higher saturated fatty alcohol.

Further, the content of the carbon black in the carbon black master batch is 30-50%.

The preparation method of the anti-tracking polyethylene sheath material comprises the following steps:

s1: adding 40-60 parts by mass of high-density polyethylene, 10-20 parts by mass of low-density polyethylene, 20-40 parts by mass of linear low-density polyethylene, 30-50 parts by mass of magnesium hydroxide, 10-20 parts by mass of zinc borate, 10-20 parts by mass of montmorillonite, 5-10 parts by mass of silicon dioxide, 5-10 parts by mass of mica, 1-2 parts by mass of a lubricant, 3-5 parts by mass of an anti-ultraviolet agent and 1-5 parts by mass of carbon black master batch into a kneading machine for blending;

s2: blending at normal temperature for 5-10min, adding 1-5 parts of flame retardant into a mixing roll, and performing mixing, initial plasticizing, final plasticizing, extruding and cooling;

s3: then tabletting, granulating, drying, weighing and packaging finished products.

Further, the initial plasticizing temperature is 120-130 ℃ for 5-10min, and the final plasticizing temperature is 125-135 ℃ for 5-10 min.

Further, the temperature sections in the extruder are 110-.

Furthermore, the tabletting adopts a flat-plate vulcanizing instrument, the tabletting temperature is 150-.

Furthermore, the cooling adopts a water cooling mode.

In conclusion, the invention has the following beneficial effects:

1. the anti-ultraviolet agent is added into the polyethylene sheath material, so that the environmental stress resistance, cracking resistance and ultraviolet aging resistance of the polyethylene sheath material can be ensured, and the insulating property and the anti-tracking capability of the polyethylene sheath material can be improved;

2. the insulativity of the prepared polyethylene sheath material is improved by reducing the consumption of carbon black in the polyethylene sheath material, so that the aim of resisting electric marks is fulfilled;

3. the polyethylene sheath material is prepared by blending the high-density polyethylene, the low-density polyethylene and the linear low-density polyethylene, the linear low-density polyethylene has small density, thin crystal layer and low melting point, so that the energy required for stable heat sealing is low, and the high-density polyethylene and the low-density polyethylene are similar to the linear low-density polyethylene in structure, so that the high-density polyethylene, the low-density polyethylene and the linear low-density polyethylene can be well compatible, and the flexibility of the prepared polyethylene sheath material is improved.

Detailed Description

The present invention will be described in further detail with reference to examples.

Example 1:

an anti-tracking polyethylene sheath material comprises the following raw materials in parts by weight: 40 parts of high-density polyethylene, 20 parts of low-density polyethylene, 20 parts of linear low-density polyethylene, 30 parts of magnesium hydroxide, 10 parts of zinc borate, 10 parts of montmorillonite, 5 parts of silicon dioxide, 6 parts of mica, 1 part of lubricant, 3 parts of anti-ultraviolet agent and 1 part of carbon black master batch.

Wherein, the main components of the uvioresistant agent are nano-scale ZnO and CeO₂The lubricant is a mixture of calcium stearate and higher saturated fatty alcohol, and 1 part of flame retardant is added into the polyethylene sheath material.

Wherein, the content of carbon black in the carbon black master batch is 50 percent.

The preparation method of the polyethylene sheath material comprises the following steps:

s1: 40 parts of high-density polyethylene, 20 parts of low-density polyethylene, 20 parts of linear low-density polyethylene, 30 parts of magnesium hydroxide, 10 parts of zinc borate, 10 parts of montmorillonite, 5 parts of silicon dioxide, 6 parts of mica, 1 part of lubricant, 3 parts of anti-ultraviolet agent and 1 part of carbon black master batch. Adding the mixture into a mixing machine for blending;

s2: stirring and blending for 5min at normal temperature, adding 1 part of flame retardant into a mixing roll, and performing mixing, preliminary plasticizing, final plasticizing, extruding and cooling; the temperature of initial plasticization is 120 ℃, the time is 5min, the temperature of final plasticization is 125 ℃, and the time is 10 min; the temperature sections in the extruder are set as 110 ℃ in the first section, 120 ℃ in the second section, 130 ℃ in the third section, 140 ℃ in the fourth section, 150 ℃ in the fifth section and 160 ℃ in the sixth section.

Wherein, the cooling mode adopts a water tank water cooling mode.

S3: and tabletting, granulating, drying, weighing and packaging a finished product, wherein the tabletting in the S2 adopts a flat-plate vulcanizing instrument, the tabletting temperature is 150 ℃, the time is 10min, and the pressure is 10 Mpa.

Example 2:

an anti-tracking polyethylene sheath material comprises the following raw materials in parts by weight: 50 parts of high-density polyethylene, 20 parts of low-density polyethylene, 30 parts of linear low-density polyethylene, 40 parts of magnesium hydroxide, 15 parts of zinc borate, 10 parts of montmorillonite, 5 parts of silicon dioxide, 8 parts of mica, 1 part of lubricant, 3 parts of anti-ultraviolet agent and 1 part of carbon black master batch.

The main components of the uvioresistant agent are nano ZnO and CeO2, the lubricant is a mixture of calcium stearate and higher saturated fatty alcohol, and 2 parts of flame retardant is added into the polyethylene sheath material.

Wherein, the content of carbon black in the carbon black master batch is 40%.

The preparation method of the polyethylene sheath material comprises the following steps:

s1: 50 parts of high-density polyethylene, 20 parts of low-density polyethylene, 30 parts of linear low-density polyethylene, 40 parts of magnesium hydroxide, 15 parts of zinc borate, 10 parts of montmorillonite, 5 parts of silicon dioxide, 8 parts of mica, 1 part of lubricant, 3 parts of anti-ultraviolet agent and 1 part of carbon black master batch. Adding the mixture into a mixing machine for blending;

s2: stirring and blending for 5min at normal temperature, adding 2 parts of flame retardant into a mixing roll, and performing mixing, preliminary plasticizing, final plasticizing, extruding and cooling; the temperature of initial plasticization is 125 ℃, the time is 6min, the temperature of final plasticization is 130 ℃, and the time is 10 min; the temperature sections in the extruder are set as 115 ℃ in the first section, 120 ℃ in the second section, 135 ℃ in the third section, 140 ℃ in the fourth section, 155 ℃ in the fifth section and 160 ℃ in the sixth section.

Wherein, the cooling mode adopts a water tank water cooling mode.

S3: and tabletting, granulating, drying, weighing and packaging a finished product, wherein the tabletting in the S2 adopts a flat-plate vulcanizing instrument, the tabletting temperature is 150 ℃, the time is 10min, and the pressure is 10 Mpa.

Example 3:

an anti-tracking polyethylene sheath material comprises the following raw materials in parts by weight: 55 parts of high-density polyethylene, 20 parts of low-density polyethylene, 40 parts of linear low-density polyethylene, 30 parts of magnesium hydroxide, 10 parts of zinc borate, 10 parts of montmorillonite, 5 parts of silicon dioxide, 6 parts of mica, 2 parts of lubricant, 5 parts of anti-ultraviolet agent and 1 part of carbon black master batch.

The main components of the uvioresistant agent are nano ZnO and CeO2, the lubricant is a mixture of calcium stearate and higher saturated fatty alcohol, and 2 parts of flame retardant is added into the polyethylene sheath material.

Wherein, the content of carbon black in the carbon black master batch is 30 percent.

The preparation method of the polyethylene sheath material comprises the following steps:

s1: 55 parts of high-density polyethylene, 20 parts of low-density polyethylene, 40 parts of linear low-density polyethylene, 30 parts of magnesium hydroxide, 10 parts of zinc borate, 10 parts of montmorillonite, 5 parts of silicon dioxide, 6 parts of mica, 2 parts of a lubricant, 5 parts of an anti-ultraviolet agent and 1 part of carbon black master batch in parts by mass. Adding the mixture into a mixing machine for blending;

s2: stirring and blending for 5min at normal temperature, adding 2 parts of flame retardant into a mixing roll, and performing mixing, preliminary plasticizing, final plasticizing, extruding and cooling; the temperature of initial plasticization is 120 ℃, the time is 5min, the temperature of final plasticization is 125 ℃, and the time is 10 min; the temperature sections in the extruder are set as 110 ℃ in the first section, 125 ℃ in the second section, 130 ℃ in the third section, 145 ℃ in the fourth section, 155 ℃ in the fifth section and 165 ℃ in the sixth section.

Wherein, the cooling mode adopts a water tank water cooling mode.

S3: and tabletting, granulating, drying, weighing and packaging a finished product, wherein the tabletting in the S2 adopts a flat-plate vulcanizing instrument, the tabletting temperature is 150 ℃, the time is 10min, and the pressure is 10 Mpa.

The polyethylene sheath materials prepared in examples 1 to 3 were named # 1, # 2 and # 3, and then compared with the conventional polyethylene sheath materials, and the properties of the four polyethylene sheath materials were measured, respectively, and the results are shown in table 1:

TABLE 1 comparison of the test results of the polyethylene sheathing materials prepared in examples 1 to 3 with those of the conventional sheathing materials

As can be seen from the data in Table 1, the anti-tracking index of the polyethylene sheath material prepared by the formula and the preparation method of the invention is obviously higher than that of the common polyethylene sheath material, and meanwhile, other properties of the polyethylene sheath material prepared by the invention are better than those of the common polyethylene sheath material.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.