CN112735643B - Copper core fluoroplastic insulated compression-resistant electric wire - Google Patents

Abstract

The invention belongs to the technical field of wire and cable materials, in particular to a copper core fluoroplastic insulated compression-resistant wire, which solves the problems that in the prior art, a wire protective layer has low tensile strength and tear strength, is easy to damage due to repeated bending or heavy load, and further easily influences the use safety and service life of the wire, and the like, and comprises the following raw materials: fluoroplastic, a plastic modifier, epoxy resin, filler, chlorinated paraffin, stearic acid, a compatilizer and a flame retardant. According to the invention, a plastic modifier is used for modifying fluoroplastics, the modified fluoroplastics are mixed with epoxy resin and then filled with filler, and finally the mixture is co-melted with chlorinated paraffin, stearic acid, a compatilizer and a flame retardant and extruded to prepare the compression-resistant wire outer sheath material; the outer sheath material prepared by the invention has high mechanical strength, excellent electrical performance, and good wear resistance, compression resistance, corrosion resistance and aging resistance.

Description

Copper core fluoroplastic insulated compression-resistant electric wire

Technical Field

The invention relates to the technical field of wire and cable materials, in particular to a copper core fluoroplastic insulated compression-resistant wire.

Background

The electric wire and cable industry is an important matching industry for national economic construction and is widely applied to various fields of national economy, the electric wire and cable is an indispensable basic device for transmitting electric energy, transmitting information and manufacturing various motors, electric appliances, instruments, automobiles, machine tools and other equipment, the electric wire and cable provides basic facilities for the power industry and the communication industry, provides important matching for various industries, national defense construction, major construction projects and the like, is similar to 'blood vessels' and 'nerves' of the national economy, is an essential guarantee for normal operation of modern economy and society, and is also an essential product for daily life of people.

With the rapid growth of Chinese economy and the further acceleration of industrialization and urbanization processes, the wire and cable industry in China develops rapidly, and in the subdivision industry of the mechanical industry, the production value scale of the wire and cable manufacturing industry accounts for one fourth of the electrical and electronic industry, is the second largest industry in the mechanical industry, which is second to the automobile industry, and occupies an important position in national economy. In recent years, the continuous and rapid development of the economy of China, the promotion of the urbanization process, the construction of large-scale power stations, the west-east power transmission, the transformation of power grids and other heavy projects indicate that the wire and cable industry has a long prospect period, so that the wire and cable industry can keep a high growth speed. The total scale, the yield and the growth speed of the wire and cable industry in China are listed at the top of the world continuously for many years, and the wire and cable manufacturing industry in the world has a very important influence.

In the prior art, the sheath layer of the electric wire and the cable is mostly made of polyethylene, polyvinyl chloride or polypropylene as main materials. The above prior art solutions have the following drawbacks: the tensile strength and the tear strength of the conventional wire protective layer are low, so that the wire is easy to break due to repeated bending or load of a heavy object in a long-term use process, and the use safety and the service life of the wire are easily influenced. Based on the statement, the invention provides a copper core fluoroplastic insulated compression-resistant wire.

Disclosure of Invention

The invention aims to solve the problems that the tensile strength and the tear strength of a wire protective layer in the prior art are low, so that the wire is easy to be repeatedly bent or damaged due to the load of a heavy object in the long-term use process, the use safety and the service life of the wire are easy to be affected, and the like.

A fluoroplastic insulated compression-resistant wire with copper cores comprises an outer sheath and a plurality of cable copper cores positioned in the outer sheath; the outer sheath comprises the following raw materials in parts by weight: 10-28 parts of fluoroplastic, 4-7 parts of plastic modifier, 50-70 parts of epoxy resin, 15-25 parts of filler, 2-4 parts of chlorinated paraffin, 1-2 parts of stearic acid, 1-3 parts of compatilizer and 1-3 parts of flame retardant.

Preferably, the outer sheath comprises the following raw materials in parts by weight: 12.5-24 parts of fluoroplastic, 5-6 parts of plastic modifier, 55-65 parts of epoxy resin, 18-22 parts of filler, 2.5-3.5 parts of chlorinated paraffin, 1.2-1.8 parts of stearic acid, 1.5-2.5 parts of compatilizer and 1.5-2.5 parts of flame retardant.

Preferably, the outer sheath comprises the following raw materials in parts by weight: 16.5 parts of fluoroplastic, 5.5 parts of plastic modifier, 60 parts of cyclic resin, 20 parts of filler, 3 parts of chlorinated paraffin, 1.5 parts of stearic acid, 2 parts of compatilizer and 2 parts of flame retardant.

Preferably, the plastic modifier is prepared by the following method: uniformly mixing 25-40 parts by weight of deionized water and 10-15 parts by weight of isopropanol, heating to 40-60 ℃, adding 2-4 parts by weight of cyclohexanecarboxylic acid and 3-5 parts by weight of trimellitic anhydride, continuously stirring and mixing, adding 20-30 parts by weight of hydroxyethyl acrylate, and uniformly stirring and mixing to obtain the plastic modifier.

Preferably, the mass ratio of the fluoroplastic modifier is 2.5-4: 1.

Preferably, the filler is prepared by the following method: adding methyl tin mercaptide which accounts for 2-8% of the total mass of the asbestos fibers into the asbestos fibers, uniformly mixing, standing for 20-40min, and carrying out spray drying on the standing mixture to obtain the required filler.

Preferably, the compatibilizer is a polyhydroxyalkanoate.

Preferably, the flame retardant is a compound mixture of aluminum magnesium hydrotalcite and 1,2, 3-benzotriazin-4-one in a mass ratio of 7-9: 1.

Preferably, the preparation method of the outer sheath comprises the following steps:

s1, weighing 10-28 parts of fluoroplastic, 4-7 parts of plastic modifier, 50-70 parts of epoxy resin, 15-25 parts of filler, 2-4 parts of chlorinated paraffin, 1-2 parts of stearic acid, 1-3 parts of compatilizer and 1-3 parts of flame retardant for later use;

s2, adding the fluoroplastic into a mixer, preheating to 80-100 ℃, adding the plastic modifier, heating to 125-135 ℃ while stirring, stirring for 10-30min, keeping the temperature, adding the epoxy resin and the filler, and uniformly stirring and mixing to obtain a main mixed material;

s3, premixing the chlorinated paraffin, the stearic acid, the compatilizer and the flame retardant for 10-20min at the temperature of 50-70 ℃, then adding the chlorinated paraffin, the stearic acid, the compatilizer and the flame retardant into the mixed main materials together, heating and melting the mixed main materials, and then extruding and molding the mixture by a double-screw extruder to obtain the outer sheath.

The invention provides a copper core fluoroplastic insulated compression-resistant wire which has the following beneficial effects:

1. according to the invention, a plastic modifier is used for modifying fluoroplastic, the modified fluoroplastic and epoxy resin are mixed and then filled with a filler, and finally the mixture is co-melted with chlorinated paraffin, stearic acid, a compatilizer and a flame retardant and extruded to prepare the compression-resistant wire outer sheath material; the outer sheath material prepared by the invention has high mechanical strength, excellent electrical performance, and good wear resistance, compression resistance, corrosion resistance and aging resistance.

2. According to the invention, the cyclohexanecarboxylic acid, trimellitic anhydride, hydroxyethyl acrylate, deionized water and isopropanol are mixed to prepare the plastic modifier, the fluoroplastic is modified by the plastic modifier, and the dosage ratio of the fluoroplastic to the plastic modifier is reasonably selected, so that the modified fluoroplastic and the epoxy resin have good compatibility, and on the premise of meeting the same performance requirement, the addition amount of the fluoroplastic is greatly reduced, and further, the production cost is reduced on the premise of ensuring the production quality.

3. The invention adopts asbestos fiber added with a small amount of tin methyl mercaptide to prepare the filler, is used for preparing and adding the outer sheath material, can obviously improve the mechanical property and mechanical property of the outer sheath material, and has good insulating property.

4. According to the invention, the fire retardant is prepared by controlling a reasonable proportion and compounding and mixing the aluminum-magnesium hydrotalcite and the 1,2, 3-benzotriazin-4-one, and is used for preparing and adding the outer sheath material, so that the fire retardant performance can be obviously improved, the oxygen index of the obtained outer sheath material is up to 42.8, and the fire retardant is low in fire retardant, non-toxic, green and environment-friendly.

Detailed Description

The present invention will be further illustrated with reference to the following specific examples.

Example one

The invention provides a fluoroplastic insulated compression-resistant wire with copper cores, which comprises an outer sheath and a plurality of cable copper cores positioned in the outer sheath; the outer sheath comprises the following raw materials in parts by weight: 10 parts of fluoroplastic, 4 parts of plastic modifier, 50 parts of epoxy resin, 15 parts of filler, 2 parts of chlorinated paraffin, 1 part of stearic acid, 1 part of polyhydroxyalkanoate and 1 part of flame retardant;

the plastic modifier is prepared by the following method: uniformly mixing 25 parts by weight of deionized water and 10 parts by weight of isopropanol, heating to 40 ℃, adding 2 parts by weight of cyclohexanecarboxylic acid and 3 parts by weight of trimellitic anhydride, continuously stirring and mixing, adding 20 parts by weight of hydroxyethyl acrylate, and uniformly stirring and mixing to obtain a plastic modifier;

the filler is prepared by the following method: adding methyl tin mercaptide accounting for 2 percent of the total mass of the asbestos fibers into the asbestos fibers, uniformly mixing, standing for 20min, and carrying out spray drying on the standing mixture to obtain the required filler;

the flame retardant is a compound mixture of aluminum magnesium hydrotalcite and 1,2, 3-benzotriazin-4-one in a mass ratio of 7: 1;

the preparation method of the outer sheath comprises the following steps:

s1, weighing 10 parts of fluoroplastic, 4 parts of plastic modifier, 50 parts of epoxy resin, 15 parts of filler, 2 parts of chlorinated paraffin, 1 part of stearic acid, 1 part of polyhydroxyalkanoate and 1 part of flame retardant for later use;

s2, adding the fluoroplastic into a mixer, preheating to 80 ℃, adding the plastic modifier, heating to 125 ℃ while stirring, stirring for 10min, keeping the temperature, adding the epoxy resin and the filler, and stirring and mixing uniformly to obtain a main mixed material;

s3, premixing the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant for 10min at the temperature of 50 ℃, then adding the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant into the mixed main material together, heating and melting the mixed main material, and then extruding and molding the mixed main material by a double-screw extruder to obtain the outer sheath.

Example two

The invention provides a fluoroplastic insulated compression-resistant wire with copper cores, which comprises an outer sheath and a plurality of cable copper cores positioned in the outer sheath; the outer sheath comprises the following raw materials in parts by weight: 12.5 parts of fluoroplastic, 5 parts of plastic modifier, 55 parts of epoxy resin, 18 parts of filler, 2.5 parts of chlorinated paraffin, 1.2 parts of stearic acid, 1.5 parts of polyhydroxyalkanoate and 1.5 parts of flame retardant;

the plastic modifier is prepared by the following method: uniformly mixing 28 parts by weight of deionized water and 11 parts by weight of isopropanol, heating to 45 ℃, adding 2.5 parts by weight of cyclohexanecarboxylic acid and 3.5 parts by weight of trimellitic anhydride, continuously stirring and mixing, adding 22 parts by weight of hydroxyethyl acrylate, and uniformly stirring and mixing to obtain a plastic modifier;

the filler is prepared by the following method: adding methyl tin mercaptide 4% of the total mass of the asbestos fibers into the asbestos fibers, uniformly mixing, standing for 25min, and carrying out spray drying on the standing mixture to obtain the required filler;

the flame retardant is a compound mixture of aluminum magnesium hydrotalcite and 1,2, 3-benzotriazin-4-one in a mass ratio of 7.5: 1;

the preparation method of the outer sheath comprises the following steps:

s1, weighing 12.5 parts of fluoroplastic, 5 parts of plastic modifier, 55 parts of epoxy resin, 18 parts of filler, 2.5 parts of chlorinated paraffin, 1.2 parts of stearic acid, 1.5 parts of polyhydroxyalkanoate and 1.5 parts of flame retardant for later use;

s2, adding the fluoroplastic into a mixer, preheating to 85 ℃, adding the plastic modifier, heating to 128 ℃ while stirring, stirring for 15min, keeping the temperature, adding the epoxy resin and the filler, and stirring and mixing uniformly to obtain a main mixed material;

s3, premixing the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant for 12min at the temperature of 55 ℃, then adding the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant into the mixed main material together, heating and melting the materials, and then extruding and molding the materials by a double-screw extruder to obtain the outer sheath.

EXAMPLE III

The invention provides a fluoroplastic insulated compression-resistant wire with copper cores, which comprises an outer sheath and a plurality of cable copper cores positioned in the outer sheath; the outer sheath comprises the following raw materials in parts by weight: 16.5 parts of fluoroplastic, 5.5 parts of plastic modifier, 60 parts of cyclic resin, 20 parts of filler, 3 parts of chlorinated paraffin, 1.5 parts of stearic acid, 2 parts of polyhydroxyalkanoate and 2 parts of flame retardant;

the plastic modifier is prepared by the following method: uniformly mixing 32 parts by weight of deionized water and 12 parts by weight of isopropanol, heating to 50 ℃, adding 3 parts by weight of cyclohexanecarboxylic acid and 4 parts by weight of trimellitic anhydride, continuously stirring and mixing, adding 25 parts by weight of hydroxyethyl acrylate, and uniformly stirring and mixing to obtain a plastic modifier;

the filler is prepared by the following method: adding methyl tin mercaptide accounting for 5 percent of the total mass of the asbestos fibers into the asbestos fibers, uniformly mixing, standing for 30min, and carrying out spray drying on the standing mixture to obtain the required filler;

the flame retardant is a compound mixture of aluminum magnesium hydrotalcite and 1,2, 3-benzotriazin-4-one in a mass ratio of 8: 1;

the preparation method of the outer sheath comprises the following steps:

s1, weighing 16.5 parts of fluoroplastic, 5.5 parts of plastic modifier, 60 parts of cyclic resin, 20 parts of filler, 3 parts of chlorinated paraffin, 1.5 parts of stearic acid, 2 parts of polyhydroxyalkanoate and 2 parts of flame retardant for later use;

s2, adding the fluoroplastic into a mixer, preheating to 90 ℃, adding the plastic modifier, heating to 130 ℃ while stirring, stirring for 20min, keeping the temperature, adding the epoxy resin and the filler, and stirring and mixing uniformly to obtain a main mixed material;

s3, premixing the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant for 15min at the temperature of 60 ℃, then adding the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant into the mixed main material together, heating and melting the materials, and then extruding and molding the materials by a double-screw extruder to obtain the outer sheath.

Example four

The invention provides a fluoroplastic insulated compression-resistant wire with copper cores, which comprises an outer sheath and a plurality of cable copper cores positioned in the outer sheath; the outer sheath comprises the following raw materials in parts by weight: 24 parts of fluoroplastic, 6 parts of plastic modifier, 65 parts of epoxy resin, 22 parts of filler, 3.5 parts of chlorinated paraffin, 1.8 parts of stearic acid, 2.5 parts of polyhydroxyalkanoate and 2.5 parts of flame retardant;

the plastic modifier is prepared by the following method: uniformly mixing 36 parts by weight of deionized water and 14 parts by weight of isopropanol, heating to 55 ℃, adding 3.5 parts by weight of cyclohexanecarboxylic acid and 4.5 parts by weight of trimellitic anhydride, continuously stirring and mixing, adding 28 parts by weight of hydroxyethyl acrylate, and uniformly stirring and mixing to obtain a plastic modifier;

the filler is prepared by the following method: adding methyl tin mercaptide 6% of the total mass of the asbestos fibers into the asbestos fibers, uniformly mixing, standing for 35min, and performing spray drying on the standing mixture to obtain the required filler;

the flame retardant is a compound mixture of aluminum magnesium hydrotalcite and 1,2, 3-benzotriazin-4-one in a mass ratio of 8.5: 1;

the preparation method of the outer sheath comprises the following steps:

s1, weighing 24 parts of fluoroplastic, 6 parts of plastic modifier, 65 parts of epoxy resin, 22 parts of filler, 3.5 parts of chlorinated paraffin, 1.8 parts of stearic acid, 2.5 parts of polyhydroxyalkanoate and 2.5 parts of flame retardant for later use;

s2, adding the fluoroplastic into a mixer, preheating to 95 ℃, adding the plastic modifier, heating to 132 ℃ while stirring, stirring for 25min, keeping the temperature, adding the epoxy resin and the filler, and stirring and mixing uniformly to obtain a main mixed material;

s3, premixing the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant for 18min at the temperature of 65 ℃, then adding the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant into the mixed main material together, heating and melting the materials, and then extruding and molding the materials by a double-screw extruder to obtain the outer sheath.

EXAMPLE five

The invention provides a fluoroplastic insulated compression-resistant wire with copper cores, which comprises an outer sheath and a plurality of cable copper cores positioned in the outer sheath; the outer sheath comprises the following raw materials in parts by weight: 28 parts of fluoroplastic, 7 parts of plastic modifier, 70 parts of epoxy resin, 25 parts of filler, 4 parts of chlorinated paraffin, 2 parts of stearic acid, 3 parts of polyhydroxyalkanoate and 3 parts of flame retardant;

the plastic modifier is prepared by the following method: uniformly mixing 40 parts by weight of deionized water and 15 parts by weight of isopropanol, heating to 60 ℃, adding 4 parts by weight of cyclohexanecarboxylic acid and 5 parts by weight of trimellitic anhydride, continuously stirring and mixing, adding 30 parts by weight of hydroxyethyl acrylate, and uniformly stirring and mixing to obtain a plastic modifier;

the filler is prepared by the following method: adding methyl tin mercaptide accounting for 8% of the total mass of the asbestos fibers into the asbestos fibers, uniformly mixing, standing for 40min, and performing spray drying on the standing mixture to obtain the required filler;

the flame retardant is a compound mixture of aluminum magnesium hydrotalcite and 1,2, 3-benzotriazin-4-one in a mass ratio of 9: 1;

the preparation method of the outer sheath comprises the following steps:

s1, weighing 28 parts of fluoroplastic, 7 parts of plastic modifier, 70 parts of epoxy resin, 25 parts of filler, 4 parts of chlorinated paraffin, 2 parts of stearic acid, 3 parts of polyhydroxyalkanoate and 3 parts of flame retardant for later use;

s2, adding the fluoroplastic into a mixer, preheating to 100 ℃, adding the plastic modifier, heating to 135 ℃ while stirring, stirring for 30min, keeping the temperature, adding the epoxy resin and the filler, and stirring and mixing uniformly to obtain a main mixed material;

s3, premixing the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant for 20min at the temperature of 70 ℃, then adding the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant into the mixed main material together, heating and melting the mixed main material, and then extruding and molding the mixed main material by a double-screw extruder to obtain the outer sheath.

Comparative example 1

The invention provides a fluoroplastic insulated compression-resistant wire with copper cores, which comprises an outer sheath and a plurality of cable copper cores positioned in the outer sheath; the outer sheath comprises the following raw materials in parts by weight: 16.5 parts of fluoroplastic, 60 parts of cyclic resin, 20 parts of filler, 3 parts of chlorinated paraffin, 1.5 parts of stearic acid, 2 parts of polyhydroxyalkanoate and 2 parts of flame retardant;

the filler is prepared by the following method: adding methyl tin mercaptide accounting for 5 percent of the total mass of the asbestos fibers into the asbestos fibers, uniformly mixing, standing for 30min, and carrying out spray drying on the standing mixture to obtain the required filler;

the flame retardant is a compound mixture of aluminum magnesium hydrotalcite and 1,2, 3-benzotriazin-4-one in a mass ratio of 8: 1;

the preparation method of the outer sheath comprises the following steps:

s1, weighing 16.5 parts of fluoroplastic, 60 parts of cyclic resin, 20 parts of filler, 3 parts of chlorinated paraffin, 1.5 parts of stearic acid, 2 parts of polyhydroxyalkanoate and 2 parts of flame retardant for later use;

s2, adding the fluoroplastic into a mixer, preheating to 90 ℃, heating to 130 ℃ while stirring, stirring for 20min, then keeping the temperature, adding the epoxy resin and the filler, and stirring and mixing uniformly to obtain a main mixed material;

s3, premixing the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant for 15min at the temperature of 60 ℃, then adding the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant into the mixed main material together, heating and melting the materials, and then extruding and molding the materials by a double-screw extruder to obtain the outer sheath.

Comparative example No. two

The invention provides a fluoroplastic insulated compression-resistant wire with copper cores, which comprises an outer sheath and a plurality of cable copper cores positioned in the outer sheath; the outer sheath comprises the following raw materials in parts by weight: 16.5 parts of fluoroplastic, 5.5 parts of plastic modifier, 60 parts of cyclic resin, 20 parts of filler, 3 parts of chlorinated paraffin, 1.5 parts of stearic acid, 2 parts of polyhydroxyalkanoate and 2 parts of flame retardant;

the plastic modifier is prepared by the following method: uniformly mixing 32 parts by weight of deionized water and 12 parts by weight of isopropanol, heating to 50 ℃, adding 3 parts by weight of cyclohexanecarboxylic acid and 4 parts by weight of trimellitic anhydride, continuously stirring and mixing, adding 25 parts by weight of hydroxyethyl acrylate, and uniformly stirring and mixing to obtain a plastic modifier;

the filler is asbestos fiber;

the flame retardant is a compound mixture of aluminum magnesium hydrotalcite and 1,2, 3-benzotriazine-4-ketone in a mass ratio of 8: 1;

the preparation method of the outer sheath comprises the following steps:

s1, weighing 16.5 parts of fluoroplastic, 5.5 parts of plastic modifier, 60 parts of cyclic resin, 20 parts of filler, 3 parts of chlorinated paraffin, 1.5 parts of stearic acid, 2 parts of polyhydroxyalkanoate and 2 parts of flame retardant for later use;

s2, adding the fluoroplastic into a mixer, preheating to 90 ℃, adding the plastic modifier, heating to 130 ℃ while stirring, stirring for 20min, keeping the temperature, adding the epoxy resin and the filler, and stirring and mixing uniformly to obtain a main mixed material;

s3, premixing the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant for 15min at the temperature of 60 ℃, then adding the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant into the mixed main material together, heating and melting the materials, and then extruding and molding the materials by a double-screw extruder to obtain the outer sheath.

Comparative example No. three

The invention provides a fluoroplastic insulated compression-resistant wire with copper cores, which comprises an outer sheath and a plurality of cable copper cores positioned in the outer sheath; the outer sheath comprises the following raw materials in parts by weight: 16.5 parts of fluoroplastic, 5.5 parts of plastic modifier, 60 parts of cyclic resin, 20 parts of filler, 3 parts of chlorinated paraffin, 1.5 parts of stearic acid, 2 parts of polyhydroxyalkanoate and 2 parts of flame retardant;

the plastic modifier is prepared by the following method: uniformly mixing 32 parts by weight of deionized water and 12 parts by weight of isopropanol, heating to 50 ℃, adding 3 parts by weight of cyclohexanecarboxylic acid and 4 parts by weight of trimellitic anhydride, continuously stirring and mixing, adding 25 parts by weight of hydroxyethyl acrylate, and uniformly stirring and mixing to obtain a plastic modifier;

the filler is prepared by the following method: adding methyl tin mercaptide accounting for 5 percent of the total mass of the asbestos fibers into the asbestos fibers, uniformly mixing, standing for 30min, and carrying out spray drying on the standing mixture to obtain the required filler;

the flame retardant is magnesium hydroxide;

the preparation method of the outer sheath comprises the following steps:

s1, weighing 16.5 parts of fluoroplastic, 5.5 parts of plastic modifier, 60 parts of cyclic resin, 20 parts of filler, 3 parts of chlorinated paraffin, 1.5 parts of stearic acid, 2 parts of polyhydroxyalkanoate and 2 parts of flame retardant for later use;

s2, adding the fluoroplastic into a mixer, preheating to 90 ℃, adding the plastic modifier, heating to 130 ℃ while stirring, stirring for 20min, keeping the temperature, adding the epoxy resin and the filler, and stirring and mixing uniformly to obtain a main mixed material;

s3, premixing the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant for 15min at the temperature of 60 ℃, then adding the chlorinated paraffin, the stearic acid, the polyhydroxyalkanoate and the flame retardant into the mixed main material together, heating and melting the materials, and then extruding and molding the materials by a double-screw extruder to obtain the outer sheath.

The mechanical properties and flame retardant properties of the outer sheath materials prepared in examples one to five and comparative examples one to three of the present invention were respectively tested, and the following results were obtained:

table 1:

the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (5)

1. The fluoroplastic insulated compression-resistant wire with the copper cores is characterized by comprising an outer sheath and a plurality of cable copper cores positioned in the outer sheath; the outer sheath comprises the following raw materials in parts by weight: 10-28 parts of fluoroplastic, 4-7 parts of plastic modifier, 50-70 parts of epoxy resin, 15-25 parts of filler, 2-4 parts of chlorinated paraffin, 1-2 parts of stearic acid, 1-3 parts of compatilizer and 1-3 parts of flame retardant;

the plastic modifier is prepared by the following method: uniformly mixing 25-40 parts by weight of deionized water and 10-15 parts by weight of isopropanol, heating to 40-60 ℃, adding 2-4 parts by weight of cyclohexanecarboxylic acid and 3-5 parts by weight of trimellitic anhydride, continuously stirring and mixing, adding 20-30 parts by weight of hydroxyethyl acrylate, and uniformly stirring and mixing to obtain a plastic modifier;

the filler is prepared by the following method: adding methyl tin mercaptide which accounts for 2-8% of the total mass of the asbestos fibers into the asbestos fibers, uniformly mixing, standing for 20-40min, and carrying out spray drying on the standing mixture to obtain the required filler;

the compatilizer is polyhydroxyalkanoate;

the flame retardant is a compound mixture of aluminum magnesium hydrotalcite and 1,2, 3-benzotriazine-4-ketone in a mass ratio of 7-9: 1.

2. The copper-core fluoroplastic insulated pressure-resistant wire according to claim 1, wherein the outer sheath comprises the following raw materials in parts by weight: 12.5-24 parts of fluoroplastic, 5-6 parts of plastic modifier, 55-65 parts of epoxy resin, 18-22 parts of filler, 2.5-3.5 parts of chlorinated paraffin, 1.2-1.8 parts of stearic acid, 1.5-2.5 parts of compatilizer and 1.5-2.5 parts of flame retardant.

3. The copper-core fluoroplastic insulated compression-resistant wire according to claim 1, wherein the outer sheath comprises the following raw materials in parts by weight: 16.5 parts of fluoroplastic, 5.5 parts of plastic modifier, 60 parts of cyclic resin, 20 parts of filler, 3 parts of chlorinated paraffin, 1.5 parts of stearic acid, 2 parts of compatilizer and 2 parts of flame retardant.

4. A copper core fluoroplastic insulated compression resistant wire according to claim 1 wherein the mass ratio of the fluoroplastic modifier is 2.5-4: 1.

5. A fluoroplastic insulated compression resistant wire as claimed in claim 1 wherein the outer sheath is prepared by a method comprising the steps of:

s1, weighing 10-28 parts of fluoroplastic, 4-7 parts of plastic modifier, 50-70 parts of epoxy resin, 15-25 parts of filler, 2-4 parts of chlorinated paraffin, 1-2 parts of stearic acid, 1-3 parts of compatilizer and 1-3 parts of flame retardant for later use;

s2, adding the fluoroplastic into a mixer, preheating to 80-100 ℃, adding the plastic modifier, heating to 125-135 ℃ while stirring, stirring for 10-30min, keeping the temperature, adding the epoxy resin and the filler, and uniformly stirring and mixing to obtain a main mixed material;

s3, premixing the chlorinated paraffin, the stearic acid, the compatilizer and the flame retardant for 10-20min at the temperature of 50-70 ℃, then adding the chlorinated paraffin, the stearic acid, the compatilizer and the flame retardant into the mixed main materials together, heating and melting the mixed main materials, and then extruding and molding the mixture by a double-screw extruder to obtain the outer sheath.