Corrosion-resistant acid and alkali-resistant silicone rubber cable and forming preparation method

Abstract

The invention relates to the technical field of cable preparation, in particular to a corrosion-resistant and acid-alkali-resistant silicone rubber cable and a forming preparation method thereof. The insulating layer and the protective sleeve are prepared from the following raw materials in parts by weight: 40 to 60 parts of methyl vinyl silicone rubber, 18 to 30 parts of ethylene propylene diene monomer, 8 to 15 parts of ethylene-vinyl acetate copolymer, 2 to 3 parts of 4-amino-6-methoxypyrimidine, 2 to 9 parts of N-methoxymethyl-2-acrylamide, 5 to 12 parts of ethoxylated methyl glucose sesquistearate and 1 to 3 parts of zinc powder. The insulating layer and the protective sleeve of the cable have good flame retardant property and mechanical property while maintaining high insulativity and good high and low temperature resistance of the silicone rubber, and the acid and alkali corrosion resistance is remarkably improved; the material can be used under acid-base and extreme temperature conditions for a long time, and has long service life.

Description

Technical Field

[0001] The invention relates to the technical field of cable preparation, and in particular to a corrosion-resistant, acid- and alkali-resistant silicone rubber cable and a molding preparation method. Background Art

[0002] A cable is usually a rope-like cable made of several or several groups of wires [at least two in each group]. Each group of wires is insulated from each other and often twisted around a center. The entire outside is covered with a highly insulating covering, with the characteristics of electricity passing inside and insulation outside.

[0003] With the development of society, the use of cables is increasing. In practical applications, cables are not only used indoors, but more often outdoors, under extreme temperature conditions, various harsh environments and weather influences (such as exposure to the sun, rain, freezing, etc.), and various construction environments (such as being dragged, bent, crushed), resulting in varying degrees of mechanical damage. During the use of cables, once damaged, it will pose a hidden danger to the power supply system and people's safety. Therefore, the power supply department has extremely high performance requirements for cable materials, requiring them to have high insulation and high and low temperature resistance.

[0004] Currently, the cable materials with good insulation and high and low temperature resistance on the market are mainly silicone rubber cable materials. However, silicone rubber cable materials generally have poor acid and alkali resistance, poor processing and forming properties, limited service life, and are prone to damage and breakage after a period of use. Summary of the invention

[0005] The purpose of the present invention is to provide a corrosion-resistant and acid-alkali-resistant silicone rubber cable and a molding preparation method, aiming to solve the problem that the existing insulated high and low temperature resistant cables have poor acid and alkali resistance and are easily damaged and broken after being used for a period of time.

[0006] To achieve the above-mentioned objectives, in a first aspect, the present invention provides a corrosion-resistant, acid-resistant and alkali-resistant silicone rubber cable, comprising a cable main core, an insulating layer and a protective sheath, wherein the insulating layer is arranged on the outside of the cable main core, and the protective layer is arranged on the outside of the insulating layer; the raw materials of the insulating layer and the protective sheath include 30-60 parts of methyl vinyl silicone rubber, 16-30 parts of ethylene propylene rubber, 8-18 parts of ethylene-vinyl acetate copolymer, 1-4 parts of 4-amino-6-methoxypyrimidine, 2 to 10 parts of N-methoxymethyl-2-acrylamide, 5-12 parts of ethoxylated methyl glucose sesquistearate, 1-3 parts of zinc powder, 3-8 parts of sodium tripolyphosphate, 3-6 parts of barium sulfate, 4-10 parts of flame retardant and 2-6 parts of titanate coupling agent in parts by weight.

[0007] In a second aspect, the present invention further provides a method for preparing a corrosion-resistant acid- and alkali-resistant silicone rubber cable, which is used to prepare the corrosion-resistant acid- and alkali-resistant silicone rubber cable as described in the first aspect, comprising the following steps:

[0008] Based on the specific gravity, the prepared raw materials are put into the mixing equipment for heating and mixing to obtain a mixed material;

[0009] Cooling the mixed material, and extruding it into sheets through an extruder to obtain an insulating material;

[0010] Select metal raw materials based on cable specification requirements and prepare the main cable core;

[0011] Extruding an insulating layer from the insulating material through an extruder to cover the outer side of the cable main core, and then extruding a protective sleeve to cover the outer side of the insulating layer to obtain a prototype cable;

[0012] The cable prototype is formed and cured by a mold, and the formed cable is inspected, wound and stored.

[0013] The specific method of putting the prepared raw materials into a mixing device for heating and mixing based on the ratio to obtain the mixed material is as follows:

[0014] Based on specific gravity, 4-amino-6-methoxypyrimidine and N-methoxymethyl-2-acrylamide are added to an electromagnetic stirrer, and water is added in an amount of 3.2 times the total mass of 4-amino-6-methoxypyrimidine and N-methoxymethyl-2-acrylamide, and the mixture is electromagnetically stirred at a temperature of 65° C. for 20 minutes, and then rotary evaporated to dryness to obtain a first mixture;

[0015] Based on specific gravity, zinc powder, sodium tripolyphosphate and barium sulfate are added to a grinder, and after grinding and mixing for 10 minutes, ethoxylated methyl glucose sesquistearate is added, and the mixture is stirred and mixed at a speed of 800 r / min to obtain a second mixture;

[0016] The first mixture was added to the second mixture, stirred at a speed of 800 r / min for 20 min, and then added into an open mill together with methyl vinyl silicone rubber, EPDM rubber, ethylene-vinyl acetate copolymer, flame retardant and titanate coupling agent. The roller speed of the open mill was controlled to be 25 r / min, the speed ratio was 1:1.2, and mixing was performed for 30 min to obtain a mixture.

[0017] Among them, the specific method of selecting metal raw materials based on cable specification requirements and preparing the cable main core is:

[0018] Select metal materials based on cable specification requirements;

[0019] The metal raw material is cleaned and tinned to prepare a cable main core.

[0020] The specific method of obtaining the prototype cable is as follows: extruding the insulating material through an extruder to extrude an insulating layer to coat the outer side of the cable main core, and then extruding a protective sleeve to coat the outer side of the insulating layer:

[0021] Extruding the insulating material through an extruder to form an insulating layer which is coated on the outside of the main core of the cable;

[0022] Performing vulcanization treatment on the insulating layer;

[0023] The protective sheath is extruded by an extruder to cover the outside of the insulating layer, so as to obtain a prototype cable.

[0024] The specific method of forming and curing the prototype cable by a mold, and inspecting, winding and storing the formed cable is as follows:

[0025] Performing a molding and curing process on the prototype cable through a mold to obtain a semi-finished cable;

[0026] Performing various performance tests on the semi-finished cables, removing defective products, and obtaining cable products;

[0027] The cable product is wound onto the winding frame and stored in a warehouse.

[0028] Among them, the various performance tests include corrosion resistance, acid and alkali resistance, insulation resistance, mechanical strength and appearance testing.

[0029] The present invention discloses a corrosion-resistant acid-alkali-resistant silicone rubber cable. The cable main core of the cable adopts a suitable metal conductor (such as copper, aluminum, etc.). The insulating layer and the protective sheath have good flame retardant properties and mechanical properties while maintaining the high insulation and good high and low temperature resistance of silicone rubber. The acid-alkali corrosion resistance is significantly improved. The cable can be used for a long time under acid-alkali and extreme temperature conditions and has a long service life. The insulating layer and the protective sheath are pre-mixed with zinc powder, sodium tripolyphosphate, barium sulfate and ethoxylated methyl glucose sesquistearate to obtain waterproof, sealing and shielding barrier properties. The good second mixture is modified by using the first mixture made of 4-amino-6-methoxypyrimidine and N-methoxymethyl-2-acrylamide, which improves the dispersion and mixing ability and surface binding ability of the second mixture with other raw materials in the formula. The raw material molecules overlap each other to effectively block moisture and corrosive media, and have good acid and alkali corrosion resistance. After acid corrosion (immersion in 98% sulfuric acid for 30 days) and alkali corrosion (immersion in 30% sodium hydroxide for 30 days), the tensile strength reduction rate is only 2.0% and 1.3%, and the tensile strength does not change significantly. The cable has good conductivity, excellent acid and alkali resistance and corrosion resistance. At the same time, the cable is drag-resistant, anti-breaking, high-wear-resistant, high-temperature resistant, and widely used in power generation, metallurgy, chemical petroleum and other fields. It solves the problem that the existing insulated high and low temperature resistant cables have poor acid and alkali resistance and are prone to damage and breakage after a period of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a cross-sectional view of a corrosion-resistant and acid-alkali-resistant silicone rubber cable provided by the present invention.

[0032] Figure 2 The present invention provides a flow chart of a method for forming and preparing a corrosion-resistant and acid-alkali-resistant silicone rubber cable.

[0033] Figure 3 It is a flow chart of a specific method of putting the prepared raw materials into a mixing device for heating and mixing based on a ratio to obtain a mixed material.

[0034] Figure 4 It is a flow chart of a specific method for selecting metal raw materials based on cable specification requirements and preparing the main core of the cable.

[0035] Figure 5It is a flow chart of a specific method of obtaining a prototype cable by extruding the insulating material through an extruder to extrude an insulating layer to cover the outside of the cable main core, and then extruding a protective sheath to cover the outside of the insulating layer.

[0036] Figure 6 It is a flow chart of a specific method of forming and curing the prototype cable through a mold, and inspecting, winding and storing the formed cable.

[0037] In the figure: 1-cable main core, 2-insulation layer, 3-protective cover. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0039] See also Figure 1 In the first aspect, the present invention provides a corrosion-resistant and acid-alkali-resistant silicone rubber cable, comprising a cable main core, an insulating layer and a protective sheath, wherein the insulating layer is arranged on the outside of the cable main core, and the protective layer is arranged on the outside of the insulating layer; the raw materials of the insulating layer and the protective sheath include 30-60 parts of methyl vinyl silicone rubber, 16-30 parts of ethylene propylene rubber, 8-18 parts of ethylene-vinyl acetate copolymer, 1-4 parts of 4-amino-6-methoxypyrimidine, 2-10 parts of N-methoxymethyl-2-acrylamide, 5-12 parts of ethoxylated methyl glucose sesquistearate, 1-3 parts of zinc powder, 3-8 parts of sodium tripolyphosphate, 3-6 parts of barium sulfate, 4-10 parts of flame retardant and 2-6 parts of titanate coupling agent in parts by weight.

[0040] In the embodiment of the present invention, the cable main core of the cable adopts a suitable metal conductor (such as copper, aluminum, etc.), the insulating layer and the protective sleeve have good flame retardant properties and mechanical properties while maintaining the high insulation and good high and low temperature resistance of silicone rubber, and the acid and alkali corrosion resistance is significantly improved, and can be used for a long time under acid and alkali and extreme temperature conditions, and has a long service life. The insulating layer and the protective sleeve are pre-mixed with zinc powder, sodium tripolyphosphate, barium sulfate and ethoxylated methyl glucose sesquistearate to form a second The mixture is modified by using the first mixture made of 4-amino-6-methoxypyrimidine and N-methoxymethyl-2-acrylamide, thereby improving the dispersion and mixing ability and surface bonding ability of the second mixture with other raw materials in the formula. The raw material molecules overlap each other to effectively block moisture and corrosive media, and have good acid and alkali corrosion resistance. After acid corrosion (immersion in 98% sulfuric acid for 30 days) and alkali corrosion (immersion in 30% sodium hydroxide for 30 days), the tensile strength reduction rate is only 2.0% and 1.3%, and the tensile strength does not change significantly. The cable has good electrical conductivity, excellent acid and alkali resistance and corrosion resistance. At the same time, the cable is drag-resistant, anti-breaking, high in wear resistance, high in high temperature resistance, and widely used in power generation, metallurgy, chemical petroleum and other fields. It solves the problem that the existing insulated high and low temperature resistant cables have poor acid and alkali resistance and are prone to damage and breakage after a period of use.

[0041] See also Figure 2-Figure 6 In a second aspect, the present invention further provides a method for preparing a corrosion-resistant acid- and alkali-resistant silicone rubber cable, which is used to prepare the corrosion-resistant acid- and alkali-resistant silicone rubber cable as described in the first aspect, comprising the following steps:

[0042] S1 puts the prepared raw materials into a mixing device based on specific gravity, heats and mixes them, and obtains a mixed material;

[0043] Specific method:

[0044] S11: adding 4-amino-6-methoxypyrimidine and N-methoxymethyl-2-acrylamide into an electromagnetic stirrer based on specific gravity, adding water in an amount of 3.2 times the total mass of 4-amino-6-methoxypyrimidine and N-methoxymethyl-2-acrylamide, stirring at 65° C. for 20 min, and then rotating and evaporating to dryness to obtain a first mixture;

[0045] S12: zinc powder, sodium tripolyphosphate and barium sulfate are added to a grinder based on specific gravity, and after grinding and mixing for 10 minutes, ethoxylated methyl glucose sesquistearate is added, and the mixture is stirred and mixed at a speed of 800 r / min to obtain a second mixture;

[0046] S13: adding the first mixture to the second mixture, stirring at a speed of 800 r / min for 20 min, and then adding them together with methyl vinyl silicone rubber, EPDM rubber, ethylene-vinyl acetate copolymer, flame retardant and titanate coupling agent into an open mill, controlling the roller speed of the open mill to mix at 25 r / min, the speed ratio of 1:1.2, mixing for 30 min, and obtaining a mixture.

[0047] S2 cools the mixture and extrude it into sheets through an extruder to obtain an insulating material;

[0048] S3 selects metal raw materials based on cable specification requirements and prepares the main cable core;

[0049] Specific method:

[0050] S31 selects metal materials based on cable specification requirements;

[0051] S32 cleans and tins the metal raw material to prepare the main cable core.

[0052] S4: Extruding the insulating material through an extruder to extrude an insulating layer to coat the outer side of the cable main core, and then extruding a protective sleeve to coat the outer side of the insulating layer to obtain a prototype cable;

[0053] Specific method:

[0054] S41: Extruding the insulating material through an extruder to form an insulating layer which is coated on the outside of the main core of the cable;

[0055] S42 performs vulcanization treatment on the insulating layer;

[0056] In the embodiment of the present invention, the purpose of the vulcanization treatment is to improve the strength and weather resistance of the insulating layer.

[0057] S43: Extruding a protective sleeve through an extruder to cover the outside of the insulating layer to obtain a prototype cable.

[0058] S5 performs molding and curing treatment on the prototype cable through a mold, and inspects, winds and stores the molded cable.

[0059] Specific method:

[0060] S51 performs a molding and curing process on the prototype cable through a mold to obtain a semi-finished cable;

[0061] In an embodiment of the present invention, the cable coated with the insulating layer and the sheath layer is molded through a mold to have a desired shape and size. The temperature and pressure of the mold need to be controlled during the molding process to ensure the molding quality and performance of the cable. The molded cable is cured to further improve its physical properties and stability. The curing temperature and time need to be determined based on the specific silicone rubber material and cable specifications.

[0062] S52 performs various performance tests on the semi-finished cable, removes defective products, and obtains cable products;

[0063] In the embodiment of the present invention, the various performance tests include corrosion resistance, acid and alkali resistance, insulation resistance, mechanical strength and appearance testing, so as to ensure that various performance indicators of the cable meet relevant standards and requirements.

[0064] S53: winding the cable product onto the winding frame and storing it in a warehouse.

[0065] The above disclosure is only a preferred embodiment of a corrosion-resistant, acid-resistant and alkali-resistant silicone rubber cable and a molding preparation method of the present invention. Of course, this cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A corrosion-resistant and acid-alkali-resistant silicone rubber cable, It is characterized by: It comprises a cable main core, an insulating layer and a protective sleeve, wherein the insulating layer is arranged on the outside of the cable main core, and the protective layer is arranged on the outside of the insulating layer; The raw materials of the insulating layer and the protective cover include 30-60 parts by weight of methyl vinyl silicone rubber, 16-30 parts of ethylene propylene rubber, 8-18 parts of ethylene-vinyl acetate copolymer, 1-4 parts of 4-amino-6-methoxypyrimidine, 2-10 parts of N-methoxymethyl-2-acrylamide, 5-12 parts of ethoxylated methyl glucose sesquistearate, 1-3 parts of zinc powder, 3-8 parts of sodium tripolyphosphate, 3-6 parts of barium sulfate, 4-10 parts of flame retardant and 2-6 parts of titanate coupling agent.

2. A method for preparing a corrosion-resistant acid-alkali-resistant silicone rubber cable, used to prepare the corrosion-resistant acid-alkali-resistant silicone rubber cable as claimed in claim 1, characterized in that: The following steps are involved: Based on the specific gravity, the prepared raw materials are put into the mixing equipment for heating and mixing to obtain a mixed material; The mixed material is cooled, and extruded into sheets by an extruder to obtain an insulating material; Select metal raw materials based on cable specification requirements and prepare the main cable core; Extruding an insulating layer from the insulating material through an extruder to cover the outer side of the cable main core, and then extruding a protective sleeve to cover the outer side of the insulating layer to obtain a prototype cable; The cable prototype is formed and cured by a mold, and the formed cable is inspected, wound and stored.

3. A method for forming and preparing a corrosion-resistant and acid-alkali-resistant silicone rubber cable as claimed in claim 2, It is characterized by: The specific method of putting the prepared raw materials into the mixing equipment based on the proportion and heating and mixing to obtain the mixed material is as follows: Based on specific gravity, 4-amino-6-methoxypyrimidine and N-methoxymethyl-2-acrylamide are added to an electromagnetic stirrer, and water is added in an amount of 3.2 times the total mass of 4-amino-6-methoxypyrimidine and N-methoxymethyl-2-acrylamide, and the mixture is electromagnetically stirred at a temperature of 65° C. for 20 minutes, and then rotary evaporated to dryness to obtain a first mixture; Based on specific gravity, zinc powder, sodium tripolyphosphate and barium sulfate are added to a grinder, and after grinding and mixing for 10 minutes, ethoxylated methyl glucose sesquistearate is added, and the mixture is stirred and mixed at a speed of 800 r / min to obtain a second mixture; The first mixture was added to the second mixture, stirred at a speed of 800 r / min for 20 min, and then added into an open mill together with methyl vinyl silicone rubber, EPDM rubber, ethylene-vinyl acetate copolymer, flame retardant and titanate coupling agent. The roller speed of the open mill was controlled to be 25 r / min, the speed ratio was 1:1.2, and mixing was performed for 30 min to obtain a mixture.

4. The method for preparing the corrosion-resistant and acid-alkali-resistant silicone rubber cable according to claim 1, It is characterized by: The specific method of selecting metal raw materials based on cable specification requirements and preparing the cable main core is as follows: Select metal materials based on cable specification requirements; The metal raw material is cleaned and tinned to prepare a cable main core.

5. The method for preparing the corrosion-resistant and acid-alkali-resistant silicone rubber cable according to claim 1, It is characterized by: The specific method of extruding the insulating material through an extruder to extrude an insulating layer to cover the outside of the cable main core, and then extruding a protective sleeve to cover the outside of the insulating layer to obtain a prototype cable is as follows: Extruding the insulating material through an extruder to form an insulating layer which is coated on the outside of the main core of the cable; Performing vulcanization treatment on the insulating layer; The protective sheath is extruded by an extruder to cover the outside of the insulating layer, so as to obtain a prototype cable.

6. The method for preparing the corrosion-resistant acid-alkali-resistant silicone rubber cable according to claim 1, characterized in that ； The specific method of forming and curing the prototype cable by a mold, and testing, winding and storing the formed cable is as follows: Performing a molding and curing process on the prototype cable through a mold to obtain a semi-finished cable; Performing various performance tests on the semi-finished cables, removing defective products, and obtaining cable products; The cable product is wound onto the winding frame and stored in a warehouse.

7. The method for preparing the corrosion-resistant acid-alkali-resistant silicone rubber cable according to claim 6, characterized in that ； The various performance tests include corrosion resistance, acid and alkali resistance, insulation resistance, mechanical strength and appearance testing.

Images