CN113024932A - Electronic cross-linked polyethylene foam material and preparation method thereof - Google Patents

Abstract

The invention relates to the technical field of polyethylene foam materials, in particular to an electronic cross-linked polyethylene foam material and a preparation method thereof; the composition comprises the following components in parts by mass: 60-75 parts of high-density linear polyethylene, 10-25 parts of foaming agent, 5-9 parts of flame retardant and 1 part of other auxiliary agents, wherein the other auxiliary agents comprise antistatic agent, crosslinking agent, auxiliary crosslinking agent, toughening agent, conductive carbon black and lubricant; the particle size of the conductive carbon black is 20nm grade, the conductive carbon black is in a linear structure, the DBP absorption value of the conductive carbon black is 220-240MI/100g, and the surface ash content of the conductive carbon black is less than 0.3 percent; the conductive carbon black is AO-80 molecular grafted nano conductive carbon black; the foaming material provided by the invention has the advantages that the conductivity of the conductive carbon black is obviously improved, the surface physicochemical property of the conductive carbon black is controlled, the AO-80 micromolecules are adopted to carry out grafting treatment on the surface of the carbon black, and the wetting agent is added, so that the dispersity of the conductive carbon black is improved, and the conductivity of the conductive carbon black is not influenced.

Description

Electronic cross-linked polyethylene foam material and preparation method thereof

Technical Field

The invention relates to the technical field of polyethylene foam materials, in particular to an electronic cross-linked polyethylene foam material and a preparation method thereof.

Background

IXPE full-name irradiation crosslinking polyethylene foam material is with polyethylene as main raw and other materials, through green healthy irradiation processing technique, utilizes the cross-linking that the ion radiation effect and material produced to change the original structure of base material, forms the independent obturator cell structure of Wangzhuang, the high-tech high-grade obturator foam material of producing.

IXPE has the following advantages: 1. the excellent buffer property is semi-rigid foaming body, the performance is not lost after strong impact, the material is widely used in the fields of precision instruments, semiconductor packaging and the like, and simultaneously, the formability is also utilized to be used in the field of manufacturing sports protective articles and leisure articles. 2. The product has strong formability, heat resistance, good extensibility and uniform density, can realize the forming of deeper parts such as vacuum forming, thermal forming and the like, and can be used as materials in the aspects of interior parts and shoe materials such as automobile air-conditioning evaporation cabinets, automobile hot-pressing ceilings and the like. 3. Sound absorption property-sound absorption and noise reduction function, and is suitable for sound absorption and sound insulation materials in strong noise equipment and environment such as airplanes, railway vehicles, automobiles, motors and the like. 4. The heat insulation property, namely a fine independent bubble structure, can effectively reduce energy exchange caused by air convection, and is suitable for manufacturing heat insulation pipes and heat insulation boards. And has anti-condensation performance, so that the composite material is extremely suitable for heat insulation materials in humid environments such as refrigerators, air conditioners, refrigeration houses and the like.

The flame retardant property and antistatic property of the conventional IXPE are still to be improved.

Disclosure of Invention

The purpose of the invention is: overcomes the defects in the prior art, and provides an electronic cross-linked polyethylene foam material which has excellent flame retardance and antistatic performance.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

an electronic cross-linked polyethylene foam material comprises the following components in parts by mass: 60-75 parts of high-density linear polyethylene, 10-25 parts of foaming agent, 5-9 parts of flame retardant and 1 part of other auxiliary agents, wherein the other auxiliary agents comprise antistatic agent, crosslinking agent, auxiliary crosslinking agent, toughening agent, conductive carbon black and lubricant;

the particle size of the conductive carbon black is 20nm grade, the conductive carbon black is in a linear structure, the DBP absorption value of the conductive carbon black is 220-240MI/100g, and the surface ash content of the conductive carbon black is less than 0.3%;

the conductive carbon black is AO-80 molecule grafted nano conductive carbon black, AO-80 molecules are firstly cracked into small molecule free radicals at high temperature and then are carried out in supercritical carbon dioxide fluid.

Further, the other auxiliary agents comprise 0.01 part of antistatic agent, 0.03 part of cross-linking agent, 0.01 part of auxiliary cross-linking agent, 0.02 part of toughening agent, 0.01 part of conductive carbon black and 0.02 part of lubricant.

Further, the crosslinking agent is one of dicumyl peroxide, divinylbenzene, diisocyanate and N, N-methylene bisacrylamide;

the auxiliary crosslinking agent is one of triallyl isocyanurate, diallyl dimaleate, pentaerythritol tetramethacrylate and divinyl benzene.

Further, the antistatic agent is polyethylene antistatic master batch, the polyethylene antistatic master batch is prepared by taking PE as a carrier and adding 28-32wt% of nonionic antistatic agent and 0.2-0.5wt% of filler, the nonionic antistatic agent is one of amine ether type ethoxy amine antistatic agent and monoglyceride type GMS antistatic agent, the filler is active nano calcium carbonate, and the particle size of the active nano calcium carbonate is 80-120 nm.

Furthermore, the active nano calcium carbonate is coupling agent modified nano calcium carbonate, and the coupling agent is selected from titanate coupling agent or aluminate coupling agent.

Further, the preparation method of the antistatic agent master batch comprises the following steps:

1) preparing titanate coupling agent or aluminate coupling agent modified nano calcium carbonate:

mixing a titanate coupling agent or an aluminate coupling agent with liquid paraffin, and then mixing the mixture with the nano calcium carbonate obtained after drying treatment at a high speed of 180-300r/min to obtain active modified nano calcium carbonate;

2) preparing the antistatic master batch:

and uniformly mixing the PE carrier, the non-ionic antistatic agent and the active modified nano calcium carbonate, and granulating by using a double-screw extruder to obtain the antistatic master batch.

Further, the toughening agent is selected from one of 302 polyester, 304 polyester and 305 polyester.

Furthermore, the foaming agent is one of tosylhydrazide and oxidized bis (phenylsulfonyl-COO) ribs.

Further, the flame retardant is a vinyl phosphorus nitrogen flame retardant PNFR, and the lubricant is polyethylene wax.

Another object of the invention is: overcomes the defects in the prior art and provides a preparation method of the electronic cross-linked polyethylene foam material.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a preparation method of an electronic cross-linked polyethylene foam material comprises the following steps:

1) weighing high-density linear polyethylene, a foaming agent, a flame retardant, an antistatic agent, a crosslinking agent, an auxiliary crosslinking agent, a toughening agent, conductive carbon black and a lubricant in proportion,

2) firstly, conducting carbon black, a lubricant and high-density crosslinked polyethylene are subjected to banburying in an internal mixer for 3-5min, wherein the temperature and the pressure of the internal mixer are respectively 120 ℃, 3MPa and the stirring speed is 80r/min, and then the mixture is extruded and granulated through a double-screw extruder; sealing and mixing for 3-5min at stirring speed of 80r/min,

3) uniformly spreading the mixed material in a plate pressing machine mold, setting the temperature and the pressure of the plate pressing machine at 120 ℃ and 3.5MPa respectively, and carrying out mold pressing and heating for 2min to obtain the electronic crosslinked polyethylene foam material.

The technical scheme adopted by the invention has the beneficial effects that:

1. the invention obviously improves the conductivity of the conductive carbon black by controlling the particle size of the conductive carbon black to be 20nm grade and the conductive carbon black to be in a linear structure, the DBP absorption value of the conductive carbon black is 220MI/100g, and the surface ash content of the conductive carbon black is less than 0.3 percent, because the polymerization force among the conductive carbon black particles is very strong, a polymer is easily formed, the dispersion of the conductive carbon black in crosslinked polyethylene can be influenced, and the conductivity of the conductive carbon black can be influenced by the traditional oxidation operation, the invention improves the dispersibility of the conductive carbon black by controlling the surface physicochemical property of the conductive carbon black, carrying out grafting treatment on the surface of the carbon black by adopting AO-80 micromolecules and adding a wetting agent, and simultaneously, the particle size of the modified conductive carbon black is smaller and narrower in distribution, thereby ensuring the dispersibility of the conductive carbon black in the polyethylene foaming material, and the conductivity of the conductive carbon black is not influenced.

2. The antistatic agent is added in the form of the antistatic agent master batch, so that the problem that the nonionic antistatic agent can be separated out and free on the surface of the polyethylene foam material due to the fact that the nonionic antistatic agent is directly added into the polyethylene foam material is solved, and the antistatic performance of the crosslinked polyethylene foam material is remarkably improved.

3. Compared with the traditional one-step mixing extrusion operation, the method improves the dispersibility of various additives in the polyethylene foam material, thereby improving the conductivity of the electronic crosslinked polyethylene foam material. Mechanical properties and good processability.

Detailed Description

The present invention will now be described in further detail with reference to specific examples. The following examples are intended to provide those skilled in the art with a more complete understanding of the present invention, and are not intended to limit the scope of the present invention.

Example 1

An electronic cross-linked polyethylene foam material comprises the following components in parts by mass: 60 parts of high-density linear polyethylene, 10 parts of foaming agent, 5 parts of flame retardant and 1 part of other auxiliary agent, wherein the other auxiliary agent comprises 0.01 part of antistatic agent, 0.03 part of crosslinking agent, 0.01 part of auxiliary crosslinking agent, 0.02 part of flexibilizer, 0.01 part of conductive carbon black and 0.02 part of lubricant;

the particle size of the conductive carbon black is 20nm grade, the conductive carbon black is in a linear structure, the DBP absorption value of the conductive carbon black is 220MI/100g, and the surface ash content of the conductive carbon black is less than 0.3%;

the conductive carbon black is AO-80 molecule grafted nano conductive carbon black, AO-80 molecule is firstly cracked into small molecule free radical at high temperature and then is carried out in supercritical carbon dioxide fluid.

Wherein the cross-linking agent is dicumyl peroxide.

Wherein, the auxiliary crosslinking agent is triallyl isocyanurate.

Wherein, the toughening agent is 302 polyester.

Wherein the foaming agent is selected from tosylhydrazide.

Wherein the flame retardant is vinyl phosphorus nitrogen flame retardant PNFR, and the lubricant is polyethylene wax.

The antistatic agent in the embodiment is prepared by selecting polyethylene antistatic master batches, wherein the polyethylene antistatic master batches are prepared by taking PE as a carrier and adding 28 wt% of nonionic antistatic agent and 0.2 wt% of filler, the nonionic antistatic agent is an amine ether ethoxyamine antistatic agent, the filler is active nano calcium carbonate, and the particle size of the active nano calcium carbonate is 80 nm. Wherein, the active nano calcium carbonate is coupling agent modified nano calcium carbonate, and the coupling agent is titanate coupling agent.

The preparation method of the antistatic agent master batch comprises the following steps:

1) preparing titanate coupling agent or aluminate coupling agent modified nano calcium carbonate:

mixing a titanate coupling agent or an aluminate coupling agent with liquid paraffin, and then mixing the mixture with the nano calcium carbonate obtained after drying treatment at a high speed of 180r/min to obtain active modified nano calcium carbonate;

2) preparing the antistatic master batch:

and uniformly mixing the PE carrier, the non-ionic antistatic agent and the active modified nano calcium carbonate, and granulating by using a double-screw extruder to obtain the antistatic master batch.

Example 2

An electronic cross-linked polyethylene foam material comprises the following components in parts by mass: 65 parts of high-density linear polyethylene, 12 parts of foaming agent, 6 parts of flame retardant and 1 part of other auxiliary agent, wherein the other auxiliary agent comprises 0.01 part of antistatic agent, 0.03 part of crosslinking agent, 0.01 part of auxiliary crosslinking agent, 0.02 part of flexibilizer, 0.01 part of conductive carbon black and 0.02 part of lubricant;

the particle size of the conductive carbon black is 20nm grade, the conductive carbon black is in a linear structure, the DBP absorption value of the conductive carbon black is 225MI/100g, and the surface ash content of the conductive carbon black is less than 0.3%;

the conductive carbon black is AO-80 molecule grafted nano conductive carbon black, AO-80 molecule is firstly cracked into small molecule free radical at high temperature and then is carried out in supercritical carbon dioxide fluid.

Wherein the cross-linking agent is dicumyl peroxide.

Wherein, the auxiliary crosslinking agent is triallyl isocyanurate.

Wherein, the toughening agent is 302 polyester.

Wherein the foaming agent is selected from tosylhydrazide.

Wherein the flame retardant is vinyl phosphorus nitrogen flame retardant PNFR, and the lubricant is polyethylene wax.

The antistatic agent in the embodiment is prepared by selecting polyethylene antistatic master batches, wherein the polyethylene antistatic master batches are prepared by taking PE as a carrier and adding 28 wt% of nonionic antistatic agent and 0.2 wt% of filler, the nonionic antistatic agent is an amine ether ethoxyamine antistatic agent, the filler is active nano calcium carbonate, and the particle size of the active nano calcium carbonate is 80 nm. Wherein, the active nano calcium carbonate is coupling agent modified nano calcium carbonate, and the coupling agent is selected from titanate coupling agent or aluminate coupling agent.

The preparation method of the antistatic agent master batch comprises the following steps:

1) preparing titanate coupling agent or aluminate coupling agent modified nano calcium carbonate:

mixing a titanate coupling agent or an aluminate coupling agent with liquid paraffin, and then mixing the mixture with the nano calcium carbonate obtained after drying treatment at a high speed, wherein the high-speed mixing speed is 200r/min, so as to obtain active modified nano calcium carbonate;

2) preparing the antistatic master batch:

and uniformly mixing the PE carrier, the non-ionic antistatic agent and the active modified nano calcium carbonate, and granulating by using a double-screw extruder to obtain the antistatic master batch.

Example 3

An electronic cross-linked polyethylene foam material comprises the following components in parts by mass: 70 parts of high-density linear polyethylene, 18 parts of foaming agent, 7 parts of flame retardant and 1 part of other auxiliary agent, wherein the other auxiliary agent comprises 0.01 part of antistatic agent, 0.03 part of crosslinking agent, 0.01 part of auxiliary crosslinking agent, 0.02 part of flexibilizer, 0.01 part of conductive carbon black and 0.02 part of lubricant;

the particle size of the conductive carbon black is 20nm grade, the conductive carbon black is in a linear structure, the DBP absorption value of the conductive carbon black is 230MI/100g, and the surface ash content of the conductive carbon black is less than 0.3%;

the conductive carbon black is AO-80 molecule grafted nano conductive carbon black, AO-80 molecule is firstly cracked into small molecule free radical at high temperature and then is carried out in supercritical carbon dioxide fluid.

Wherein the cross-linking agent is divinylbenzene.

Wherein the auxiliary crosslinking agent is diallyl dimaleate.

Wherein, the toughening agent is 304 polyester.

Wherein the foaming agent is selected from tosylhydrazide.

Wherein the flame retardant is vinyl phosphorus nitrogen flame retardant PNFR, and the lubricant is polyethylene wax.

The antistatic agent in the embodiment is prepared by selecting polyethylene antistatic master batches, wherein the polyethylene antistatic master batches are prepared by taking PE as a carrier and adding 30 wt% of nonionic antistatic agent and 0.3 wt% of filler, the nonionic antistatic agent is an amine ether ethoxyamine antistatic agent, the filler is active nano calcium carbonate, and the particle size of the active nano calcium carbonate is 100 nm. Wherein, the active nano calcium carbonate is coupling agent modified nano calcium carbonate, and the coupling agent is titanate coupling agent.

The preparation method of the antistatic agent master batch comprises the following steps:

1) preparing titanate coupling agent or aluminate coupling agent modified nano calcium carbonate:

mixing a titanate coupling agent or an aluminate coupling agent with liquid paraffin, and then mixing the mixture with the nano calcium carbonate obtained after drying treatment at a high speed, wherein the high-speed mixing speed is 200r/min, so as to obtain active modified nano calcium carbonate;

2) preparing the antistatic master batch:

and uniformly mixing the PE carrier, the non-ionic antistatic agent and the active modified nano calcium carbonate, and granulating by using a double-screw extruder to obtain the antistatic master batch.

Example 4

An electronic cross-linked polyethylene foam material comprises the following components in parts by mass: 72 parts of high-density linear polyethylene, 21 parts of foaming agent, 8 parts of flame retardant and 1 part of other auxiliary agent, wherein the other auxiliary agent comprises 0.01 part of antistatic agent, 0.03 part of crosslinking agent, 0.01 part of auxiliary crosslinking agent, 0.02 part of flexibilizer, 0.01 part of conductive carbon black and 0.02 part of lubricant;

the particle size of the conductive carbon black is 20nm grade, the conductive carbon black is in a linear structure, the DBP absorption value of the conductive carbon black is 235MI/100g, and the surface ash content of the conductive carbon black is less than 0.3%;

the conductive carbon black is AO-80 molecule grafted nano conductive carbon black, AO-80 molecule is firstly cracked into small molecule free radical at high temperature and then is carried out in supercritical carbon dioxide fluid.

Wherein the cross-linking agent is N, N-methylene bisacrylamide.

Wherein, the auxiliary crosslinking agent is pentaerythritol tetra-methyl acrylate.

Wherein, the toughening agent is 304 polyester.

Wherein, the foaming agent is selected from oxidized bis (benzene sulfonate).

Wherein the flame retardant is vinyl phosphorus nitrogen flame retardant PNFR, and the lubricant is polyethylene wax.

The antistatic agent in the embodiment is prepared by selecting polyethylene antistatic master batches, wherein the polyethylene antistatic master batches are prepared by taking PE as a carrier and adding 30 wt% of nonionic antistatic agent and 0.4 wt% of filler, the nonionic antistatic agent is monoglyceride GMS antistatic agent, the filler is active nano calcium carbonate, and the particle size of the active nano calcium carbonate is 100 nm. Wherein the active nano calcium carbonate is coupling agent modified nano calcium carbonate, and the coupling agent is an aluminate coupling agent.

The preparation method of the antistatic agent master batch comprises the following steps:

1) preparing titanate coupling agent or aluminate coupling agent modified nano calcium carbonate:

mixing a titanate coupling agent or an aluminate coupling agent with liquid paraffin, and then mixing the mixture with the nano calcium carbonate obtained after drying treatment at a high speed, wherein the high-speed mixing speed is 250r/min, so as to obtain active modified nano calcium carbonate;

2) preparing the antistatic master batch:

and uniformly mixing the PE carrier, the non-ionic antistatic agent and the active modified nano calcium carbonate, and granulating by using a double-screw extruder to obtain the antistatic master batch.

Example 5

An electronic cross-linked polyethylene foam material comprises the following components in parts by mass: 75 parts of high-density linear polyethylene, 25 parts of foaming agent, 9 parts of flame retardant and 1 part of other auxiliary agent, wherein the other auxiliary agent comprises 0.01 part of antistatic agent, 0.03 part of crosslinking agent, 0.01 part of auxiliary crosslinking agent, 0.02 part of flexibilizer, 0.01 part of conductive carbon black and 0.02 part of lubricant;

the particle size of the conductive carbon black is 20nm grade, the conductive carbon black is in a linear structure, the DBP absorption value of the conductive carbon black is 240MI/100g, and the surface ash content of the conductive carbon black is less than 0.3%;

the conductive carbon black is AO-80 molecule grafted nano conductive carbon black, AO-80 molecule is firstly cracked into small molecule free radical at high temperature and then is carried out in supercritical carbon dioxide fluid.

Wherein the cross-linking agent is N, N-methylene bisacrylamide.

Wherein, the auxiliary crosslinking agent is divinylbenzene.

Wherein, 305 polyester is selected as the toughening agent.

Wherein, the foaming agent is selected from oxidized bis (benzene sulfonate).

Wherein the flame retardant is vinyl phosphorus nitrogen flame retardant PNFR, and the lubricant is polyethylene wax.

The antistatic agent in the embodiment is prepared by selecting polyethylene antistatic master batches, wherein the polyethylene antistatic master batches are prepared by taking PE as a carrier and adding 32wt% of nonionic antistatic agent and 0.5wt% of filler, the nonionic antistatic agent is monoglyceride GMS antistatic agent, the filler is active nano calcium carbonate, and the particle size of the active nano calcium carbonate is 120 nm. Wherein the active nano calcium carbonate is coupling agent modified nano calcium carbonate, and the coupling agent is an aluminate coupling agent.

The preparation method of the antistatic agent master batch comprises the following steps:

1) preparing titanate coupling agent or aluminate coupling agent modified nano calcium carbonate:

mixing a titanate coupling agent or an aluminate coupling agent with liquid paraffin, and then mixing the mixture with the nano calcium carbonate obtained after drying treatment at a high speed of 300r/min to obtain active modified nano calcium carbonate;

2) preparing the antistatic master batch:

and uniformly mixing the PE carrier, the non-ionic antistatic agent and the active modified nano calcium carbonate, and granulating by using a double-screw extruder to obtain the antistatic master batch.

The method for preparing the electronically crosslinked polyethylene foam of examples 1 to 5 includes the steps of:

1) weighing high-density linear polyethylene, a foaming agent, a flame retardant, an antistatic agent, a crosslinking agent, an auxiliary crosslinking agent, a toughening agent, conductive carbon black and a lubricant in proportion,

2) firstly, conducting carbon black, a lubricant and high-density crosslinked polyethylene are subjected to banburying in an internal mixer for 3-5min, wherein the temperature and the pressure of the internal mixer are respectively 120 ℃, 3MPa and the stirring speed is 80r/min, and then the mixture is extruded and granulated through a double-screw extruder; sealing and mixing for 3-5min at stirring speed of 80r/min,

3) uniformly spreading the mixed material in a plate pressing machine mold, setting the temperature and the pressure of the plate pressing machine at 120 ℃ and 3.5MPa respectively, carrying out mold pressing and heating for 2min to obtain the electronic crosslinked polyethylene foam material, putting a foamed sample into an oven at 250 ℃ for drying, carrying out constant temperature heating for 15min, taking out, and cooling at room temperature for 24h to obtain a finished sheet, wherein the length, the width and the height of the finished sheet are 20cm, 12cm and 2.2cm respectively.

Comparative example 1

In comparative example 1, the amine ether type ethoxyamine antistatic agent was directly added, instead of being added in the form of polyethylene plastic master batch, and the other raw materials and preparation method were the same as those of example 3.

Comparative example 2

The conductive carbon black of comparative example 2 has a particle size of 20nm, a linear structure, a DBP absorption of 240MI/100g, a surface ash of > 0.3%, and the rest of the raw materials and preparation method are the same as those of example 3.

Comparative example 3

The comparative example 3 uses nano calcium carbonate instead of activated nano calcium carbonate, and the rest of the raw materials and the preparation method are the same as those of the example 3.

The surface resistivity (Ω) and the impact strength (KJ/m) of the finished sheets obtained in examples 1 to 5 and comparative examples 1 to 3 were measured²) And (3) detecting parameters such as tensile strength (MPa) and elongation at break (%).

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art 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. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (10)

1. An electronic cross-linked polyethylene foam material is characterized in that: the composition comprises the following components in parts by mass: 60-75 parts of high-density linear polyethylene, 10-25 parts of foaming agent, 5-9 parts of flame retardant and 1 part of other auxiliary agents, wherein the other auxiliary agents comprise antistatic agent, crosslinking agent, auxiliary crosslinking agent, toughening agent, conductive carbon black and lubricant;

the particle size of the conductive carbon black is 20nm grade, the conductive carbon black is in a linear structure, the DBP absorption value of the conductive carbon black is 220-240MI/100g, and the surface ash content of the conductive carbon black is less than 0.3%;

the conductive carbon black is AO-80 molecular grafted nano conductive carbon black.

2. The electronically crosslinked polyethylene foam according to claim 1, characterized in that: the other auxiliary agents comprise 0.01 part of antistatic agent, 0.03 part of cross-linking agent, 0.01 part of auxiliary cross-linking agent, 0.02 part of toughening agent, 0.01 part of conductive carbon black and 0.02 part of lubricating agent.

3. The electronically crosslinked polyethylene foam according to claim 1, characterized in that: the cross-linking agent is one of dicumyl peroxide, divinyl benzene, diisocyanate and N, N-methylene bisacrylamide;

the auxiliary crosslinking agent is one of triallyl isocyanurate, diallyl dimaleate, pentaerythritol tetramethacrylate and divinyl benzene.

4. The electronically crosslinked polyethylene foam according to claim 1, characterized in that: the antistatic agent is prepared from polyethylene antistatic master batches, wherein the polyethylene antistatic master batches are prepared by taking PE as a carrier and adding 28-32wt% of nonionic antistatic agent and 0.2-0.5wt% of filler, the nonionic antistatic agent is one of amine ether type ethoxyamine antistatic agent and monoglyceride type GMS antistatic agent, the filler is active nano calcium carbonate, and the particle size of the active nano calcium carbonate is 80-120 nm.

5. The electronically crosslinked polyethylene foam according to claim 4, wherein: the active nano calcium carbonate is coupling agent modified nano calcium carbonate, and the coupling agent is selected from titanate coupling agent or aluminate coupling agent.

6. The electronically crosslinked polyethylene foam according to claim 5, wherein: the preparation method of the antistatic agent master batch comprises the following steps:

1) preparing titanate coupling agent or aluminate coupling agent modified nano calcium carbonate:

mixing a titanate coupling agent or an aluminate coupling agent with liquid paraffin, and then mixing the mixture with the nano calcium carbonate obtained after drying treatment at a high speed of 180-300r/min to obtain active modified nano calcium carbonate;

2) preparing the antistatic master batch:

and uniformly mixing the PE carrier, the non-ionic antistatic agent and the active modified nano calcium carbonate, and granulating by using a double-screw extruder to obtain the antistatic master batch.

7. The electronically crosslinked polyethylene foam according to claim 1, characterized in that: the toughening agent is selected from one of 302 polyester, 304 polyester and 305 polyester.

8. The electronically crosslinked polyethylene foam according to claim 1, characterized in that: the foaming agent is one of tosylhydrazide and oxidized bis (phenylsulfonyl-cool) rib.

9. The electronically crosslinked polyethylene foam according to claim 1, characterized in that: the flame retardant is vinyl phosphorus nitrogen flame retardant PNFR, and the lubricant is polyethylene wax.

10. The method for preparing an electronically crosslinked polyethylene foam according to any one of claims 1 to 9, wherein: the preparation method comprises the following steps:

1) weighing high-density linear polyethylene, a foaming agent, a flame retardant, an antistatic agent, a crosslinking agent, an auxiliary crosslinking agent, a toughening agent, conductive carbon black and a lubricant in proportion,

2) firstly, conducting carbon black, a lubricant and high-density crosslinked polyethylene are subjected to banburying in an internal mixer for 3-5min, wherein the temperature and the pressure of the internal mixer are respectively 120 ℃, 3MPa and the stirring speed is 80r/min, and then the mixture is extruded and granulated through a double-screw extruder; sealing and mixing for 3-5min at stirring speed of 80r/min,

3) uniformly spreading the mixed material in a plate pressing machine mold, setting the temperature and the pressure of the plate pressing machine at 120 ℃ and 3.5MPa respectively, and carrying out mold pressing and heating for 2min to obtain the electronic crosslinked polyethylene foam material.