阅读说明：本技术 一种耐热型聚乙烯电缆料及其制备方法 (Heat-resistant polyethylene cable material and preparation method thereof ) 是由 李国宝 郑桂东 尹华顺 于 2020-05-14 设计创作，主要内容包括：本发明公开了一种耐热型聚乙烯电缆料,包括以下重量份的原料：聚乙烯树脂55-65份、膨润土改性硅酸铝陶瓷纤维10-20份、改性无机硅酸树脂乳液5-15份、硅石粉5-15份、硬脂酸6-10份、聚乙烯蜡5-15份、碳酸钙10-20份。本发明加入的膨润土改性硅酸铝陶瓷纤维采用硅酸铝陶瓷纤维切丝处理,硅酸铝陶瓷纤维本身具有纤维状结构,能够分散在基体内,从而起到支撑的效果,通过磷酸溶液处理目的是起到破坏表面结构,等离子体轰炸处理破坏内部结构,从而膨润土液能够对纤维结构内部进行改性,从而穿插到结构中,使体系结构更为牢固。(The invention discloses a heat-resistant polyethylene cable material which comprises the following raw materials in parts by weight: 55-65 parts of polyethylene resin, 10-20 parts of bentonite modified aluminum silicate ceramic fiber, 5-15 parts of modified inorganic silicic acid resin emulsion, 5-15 parts of silica powder, 6-10 parts of stearic acid, 5-15 parts of polyethylene wax and 10-20 parts of calcium carbonate. According to the invention, the added bentonite modified aluminum silicate ceramic fiber is subjected to shredding treatment by adopting the aluminum silicate ceramic fiber, the aluminum silicate ceramic fiber has a fibrous structure and can be dispersed in a matrix, so that a supporting effect is achieved, the purpose of destroying the surface structure is achieved through treatment of phosphoric acid solution, the internal structure is destroyed through plasma bombardment treatment, so that the bentonite liquid can modify the inside of the fiber structure, and the bentonite liquid penetrates into the structure, so that the system structure is firmer.)

1. A heat-resistant polyethylene cable material is characterized by comprising the following raw materials in parts by weight:

55-65 parts of polyethylene resin, 10-20 parts of bentonite modified aluminum silicate ceramic fiber, 5-15 parts of modified inorganic silicic acid resin emulsion, 5-15 parts of silica powder, 6-10 parts of stearic acid, 5-15 parts of polyethylene wax and 10-20 parts of calcium carbonate.

2. The heat-resistant polyethylene cable material as claimed in claim 1, wherein the heat-resistant polyethylene cable material comprises the following raw materials in parts by weight:

60 parts of polyethylene resin, 15 parts of bentonite modified aluminum silicate ceramic fiber, 10 parts of modified inorganic silicic acid resin emulsion, 10 parts of silica powder, 8 parts of stearic acid, 10 parts of polyethylene wax and 15 parts of calcium carbonate.

3. The heat-resistant polyethylene cable material as claimed in claim 1, wherein the preparation method of the bentonite modified alumina silicate ceramic fiber comprises the following steps: the aluminum silicate ceramic fiber is subjected to shredding treatment by a shredding machine, the shredding length is 1-2mm, then the aluminum silicate ceramic fiber is soaked in phosphoric acid solution for 10-20min at the soaking temperature of 55-65 ℃, then the aluminum silicate ceramic fiber is placed in a plasma box for bombing treatment for 2-10min, the power of the plasma is 100-500W, then the aluminum silicate ceramic fiber is sent into bentonite liquid for high-pressure uniform dispersion treatment, then the aluminum silicate ceramic fiber is filtered, and the filter residue is subjected to hot-pressing calcination treatment, so that the aluminum silicate ceramic fiber composite material is obtained.

4. A heat resistant polyethylene cable material as claimed in claim 3, wherein the conditions of the high pressure dispersion treatment are as follows: the uniform dispersion is carried out for 15-25min under the pressure of 20-50MPa, and the uniform dispersion rotating speed is 1000-1200 r/min.

5. The heat-resistant polyethylene cable material as claimed in claim 3, wherein the bentonite liquid is prepared by mixing bentonite and concentrated acid according to a weight ratio of 1: 5.

6. The heat resistant polyethylene cable material as claimed in claim 3, wherein the pressure of the hot pressing calcination treatment is 5-10MPa, the calcination temperature is 300-500 ℃, and the calcination time is 10-20 min.

7. The heat-resistant polyethylene cable material according to claim 1, wherein the modification method of the modified inorganic silicic acid resin emulsion comprises the following steps: adding the inorganic silicic acid resin emulsion into a silane coupling agent KH560 for ultrasonic dispersion for 10-20min, wherein the ultrasonic power is 100-200W, standing for 15-25min, then adding a compatilizer maleic anhydride grafted polyethylene, stirring at a low speed of 200r/min for 25-35min, and stirring to obtain the modified inorganic silicic acid resin emulsion.

8. A method for preparing the heat-resistant polyethylene cable material as claimed in claims 1-7, which comprises the following steps:

the method comprises the following steps: weighing the raw materials of each component as required:

and step two, sequentially adding the polyethylene resin, the bentonite modified aluminum silicate ceramic fiber, the modified inorganic silicic acid resin emulsion, the silica powder, the stearic acid, the polyethylene wax and the calcium carbonate into a stirrer, wherein the stirring speed is 500r/min, the stirring time is 5-15min, then sending the mixture into a double-screw extruder for extrusion, the extrusion temperature is 185 ℃, and extruding to obtain the polyethylene cable material.

Technical Field

The invention relates to the technical field of polyethylene cable materials, in particular to a heat-resistant polyethylene cable material and a preparation method thereof.

Background

The plastic used for the insulation and the sheath of the electric wire and the electric cable is commonly called as a cable material, and comprises various varieties such as rubber, plastic, nylon and the like. The cable material production enterprises take cable production enterprises as users, and have the market of cable materials as long as the requirements of wires and cables are met. The wire and cable products almost need an insulating layer opening except bare wire products such as steel-cored aluminum stranded wires, electromagnetic wires and the like. At present, China has 5000 electric wire and cable production enterprises, and has huge demands on electric wire and cable products for urban and rural power grid transformation, western large-scale development and communication facility large-scale upgrading transformation, so that the cable material has a wide market development prospect in China for a period of time.

The existing cable material is made of polyethylene material, and the cable material has poor heat-resisting effect, so that further perfect treatment is needed.

Disclosure of Invention

The invention aims to provide a heat-resistant polyethylene cable material and a preparation method thereof, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a heat-resistant polyethylene cable material which comprises the following raw materials in parts by weight:

55-65 parts of polyethylene resin, 10-20 parts of bentonite modified aluminum silicate ceramic fiber, 5-15 parts of modified inorganic silicic acid resin emulsion, 5-15 parts of silica powder, 6-10 parts of stearic acid, 5-15 parts of polyethylene wax and 10-20 parts of calcium carbonate.

Preferably, the heat-resistant polyethylene cable material comprises the following raw materials in parts by weight:

60 parts of polyethylene resin, 15 parts of bentonite modified aluminum silicate ceramic fiber, 10 parts of modified inorganic silicic acid resin emulsion, 10 parts of silica powder, 8 parts of stearic acid, 10 parts of polyethylene wax and 15 parts of calcium carbonate.

Preferably, the preparation method of the bentonite modified alumina silicate ceramic fiber comprises the following steps: the aluminum silicate ceramic fiber is subjected to shredding treatment by a shredding machine, the shredding length is 1-2mm, then the aluminum silicate ceramic fiber is soaked in phosphoric acid solution for 10-20min at the soaking temperature of 55-65 ℃, then the aluminum silicate ceramic fiber is placed in a plasma box for bombing treatment for 2-10min, the power of the plasma is 100-500W, then the aluminum silicate ceramic fiber is sent into bentonite liquid for high-pressure uniform dispersion treatment, then the aluminum silicate ceramic fiber is filtered, and the filter residue is subjected to hot-pressing calcination treatment, so that the aluminum silicate ceramic fiber composite material is obtained.

Preferably, the conditions of the high-pressure dispersion treatment are as follows: the uniform dispersion is carried out for 15-25min under the pressure of 20-50MPa, and the uniform dispersion rotating speed is 1000-1200 r/min.

Preferably, the bentonite liquid is prepared by mixing bentonite and concentrated acid according to the weight ratio of 1: 5.

Preferably, the pressure of the hot-pressing calcination treatment is 5-10MPa, the calcination temperature is 300-500 ℃, and the calcination time is 10-20 min.

Preferably, the modification method of the modified inorganic silicic acid resin emulsion comprises the following steps: adding the inorganic silicic acid resin emulsion into a silane coupling agent KH560 for ultrasonic dispersion for 10-20min, wherein the ultrasonic power is 100-200W, standing for 15-25min, then adding a compatilizer maleic anhydride grafted polyethylene, stirring at a low speed of 200r/min for 25-35min, and stirring to obtain the modified inorganic silicic acid resin emulsion.

The invention also provides a preparation method of the heat-resistant polyethylene cable material, which comprises the following steps:

the method comprises the following steps: weighing the raw materials of each component as required:

and step two, sequentially adding the polyethylene resin, the bentonite modified aluminum silicate ceramic fiber, the modified inorganic silicic acid resin emulsion, the silica powder, the stearic acid, the polyethylene wax and the calcium carbonate into a stirrer, wherein the stirring speed is 500r/min, the stirring time is 5-15min, then sending the mixture into a double-screw extruder for extrusion, the extrusion temperature is 185 ℃, and extruding to obtain the polyethylene cable material.

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

(1) according to the invention, the added bentonite modified aluminum silicate ceramic fiber is subjected to shredding treatment by adopting the aluminum silicate ceramic fiber, the aluminum silicate ceramic fiber has a fibrous structure and can be dispersed in a matrix, so that a supporting effect is achieved, the purpose of destroying the surface structure is achieved through treatment of phosphoric acid solution, the internal structure is destroyed through plasma bombardment treatment, so that bentonite liquid can modify the interior of the fiber structure and can penetrate into the structure, the system structure is firmer, and the stability of a material product can be improved after the bentonite modified aluminum silicate ceramic fiber is compounded with raw materials such as polyethylene resin, and the heat-resisting effect of a cable material is improved.

(2) The inorganic silicic acid resin emulsion is firstly added into a silane coupling agent KH560 for ultrasonic dispersion for 10min, the ultrasonic power is 100W, and then the inorganic silicic acid resin emulsion is blended with a compatilizer, namely maleic anhydride grafted polyethylene, so that the inorganic silicic acid resin emulsion is better matched with polyethylene resin, and the stability of the cable material is enhanced.

(3) The silica powder has a needle-shaped structure and can penetrate into a system structure, so that the pores of the raw material structure can be filled, the structure is more stable, and the thermal stability of a material product is improved.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to specific embodiments, 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.