Environment-friendly cable with flame-retardant effect

Abstract

The invention relates to the field of cables, in particular to an environment-friendly cable with a flame-retardant effect. The environment-friendly cable with the flame-retardant effect comprises a conductor, an insulating layer, a flame-retardant layer and an annular protective sleeve layer, the inner side of the insulating layer wraps the outer side of the conductor, the inner side of the flame-retardant layer wraps the outer side of the insulating layer, and the inner side of the annular protective sleeve layer wraps the outer side of the flame-retardant layer. Wherein the flame-retardant layer and the annular protective sleeve layer are respectively composed of an inner layer, a middle layer and an outer layer, and the inner layers, the middle layers and the outer layers are sequentially distributed from inside to outside. According to the environment-friendly cable with the flame-retardant effect provided by the invention, the flame-retardant layer and the annular protective sleeve layer both adopt a layered structure design, so that the overall flame-retardant performance is remarkably improved; the flame-retardant performance, the oxidation resistance, the wear resistance, the weather resistance and the like of the flame-retardant layer and the annular protective sleeve layer can be comprehensively improved, so that the safety and the reliability of the cable are effectively improved, and the service life of the cable is effectively prolonged.

Description

Technical Field

[0001] The invention relates to the field of cables, and in particular to an environmentally friendly cable with flame retardant effect. Background Art

[0002] With the development of society and the improvement of people's living standards, the safety requirements for buildings, vehicles and other places are getting higher and higher. In these places, cables are important electrical connection components, and their flame retardant properties are directly related to the safety of people and property losses when a fire occurs.

[0003] Traditional cables have poor flame retardant properties and are prone to burn in accidental situations such as fire, causing casualties and property losses. Although some traditional cables also have flame retardants added, their flame retardant properties still cannot meet increasingly stringent safety requirements.

[0004] Therefore, it is necessary to provide a new environmentally friendly cable with flame retardant effect to solve the above technical problems. Summary of the invention

[0005] In order to overcome the defects of the prior art, an environmentally friendly cable with flame retardant effect is provided to solve the above problems.

[0006] The environmentally friendly cable with flame retardant effect provided by the present invention comprises: a conductor, an insulating layer, a flame retardant layer and an annular protective sheath layer; the inner side of the insulating layer is coated on the outer side of the conductor, the inner side of the flame retardant layer is coated on the outer side of the insulating layer, and the inner side of the annular protective sheath layer is coated on the outer side of the flame retardant layer; wherein the flame retardant layer and the annular protective sheath layer are both composed of an inner layer, a middle layer and an outer layer, and the inner layer, the middle layer and the outer layer are distributed in sequence from the inside to the outside.

[0007] Preferably, the insulating layer is made of the following raw materials in parts by weight: 100 parts of polyolefin resin; 15-25 parts of flame retardant; 1-3 parts of antioxidant; and 0.5-1.5 parts of lubricant.

[0008] Preferably, the flame retardant is one or more of aluminum hydroxide, magnesium hydroxide, triphenyl phosphate or triester phosphate.

[0009] Preferably, the antioxidant is a hindered phenol antioxidant or a phosphite antioxidant.

[0010] Preferably, the lubricant is calcium stearate, zinc stearate or magnesium stearate.

[0011] Preferably, the inner layer is made of the following raw materials in parts by weight: 100 parts of polyolefin resin; 40-60 parts of flame retardant.

[0012] Preferably, the middle layer is made of the following raw materials in parts by weight: 100 parts of polyolefin resin; 30-50 parts of flame retardant; 1-3 parts of antioxidant.

[0013] Preferably, the outer layer is made of the following raw materials in parts by weight: 100 parts of polyolefin resin; 20-40 parts of flame retardant; 0.5-1.5 parts of lubricant.

[0014] Preferably, the material composition of the inner layer, the middle layer and the outer layer in the flame retardant layer is the same as that of the inner layer, the middle layer and the outer layer in the ring protection sleeve layer.

[0015] Preferably, in step 1, the conductor is processed by wire drawing, twisting and other processes to obtain a conductor of required specifications;

[0016] Step 2: After the raw materials for the insulating layer are mixed evenly, they are extruded and coated on the conductor through an extruder to form an insulating layer;

[0017] Step 3: After the raw materials of the flame retardant layer and the environmental protection sleeve layer are mixed evenly, they are extruded and coated on the insulating layer through a co-extruder to form a flame retardant layer and an environmental protection sleeve layer;

[0018] Step 4: Cool, pull, and reel the cable to obtain a finished cable.

[0019] Compared with the related art, the environmentally friendly cable with flame retardant effect provided by the present invention has the following beneficial effects:

[0020] The present invention adopts a layered structure design in both the flame retardant layer and the environmental protection sleeve layer, and both have an inner layer, a middle layer and an outer layer, so that the advantages of each layer of material can be fully utilized and the overall flame retardant performance can be significantly improved. By reasonably configuring the composition and proportion of each layer of material, the flame retardant layer and the environmental protection sleeve layer can be comprehensively improved in terms of flame retardant performance, antioxidant performance, wear resistance and weather resistance, thereby effectively improving the safety, reliability and service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a preferred embodiment of an environmentally friendly cable with flame retardant effect provided by the present invention;

[0022] Figure 2 for Figure 1 The schematic diagram of the planed structure shown;

[0023] Figure 3 for Figure 1 A schematic structural diagram of the front view shown;

[0024] Figure 4 for Figure 1 The structural schematic diagram of the flame retardant layer shown;

[0025] Figure 5 for Figure 1 Schematic diagram of the structure of the ring protective sleeve layer shown.

[0026] Numbers in the figure: 1, conductor; 2, insulation layer; 3, flame retardant layer; 4, protective sheath layer; 5, inner layer; 6, middle layer; 7, outer layer. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] Embodiment 1

[0029] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0030] An embodiment of the present invention provides an environmentally friendly cable with a flame retardant effect. The environmentally friendly cable with a flame retardant effect comprises: a conductor 1, an insulating layer 2, a flame retardant layer 3 and an annular protective sheath layer 4; the inner side of the insulating layer 2 is coated on the outer side of the conductor 1, the inner side of the flame retardant layer 3 is coated on the outer side of the insulating layer 2, and the inner side of the annular protective sheath layer 4 is coated on the outer side of the flame retardant layer 3; wherein the flame retardant layer 3 and the annular protective sheath layer 4 are both composed of an inner layer 5, an intermediate layer 6 and an outer layer 7, and the inner layer 5, the intermediate layer 6 and the outer layer 7 are sequentially distributed from the inside to the outside, and the inner layer 5 It is made of the following raw materials in parts by weight: 100 parts of polyolefin resin; 40-60 parts of flame retardant, the middle layer 6 is made of the following raw materials in parts by weight: 100 parts of polyolefin resin; 30-50 parts of flame retardant; 1-3 parts of antioxidant, the outer layer 7 is made of the following raw materials in parts by weight: 100 parts of polyolefin resin; 20-40 parts of flame retardant; 0.5-1.5 parts of lubricant, and the inner layer 5, middle layer 6 and outer layer 7 in the flame retardant layer 3 have the same material composition as the inner layer 5, middle layer 6 and outer layer 7 in the environmental protection sleeve layer 4.

[0031] It should be noted that: the conductor 1 is the core part of the cable, which is used to transmit current or signals. The material of the conductor 1 can be copper, aluminum and other metal materials with good conductivity. The insulating layer 2 is coated on the outside of the conductor 1 to prevent the leakage of current or signals and provide mechanical protection. The flame retardant layer 3 is arranged on the outside of the insulating layer 2 to improve the flame retardant performance of the cable. The inner layer 5 is composed of polyolefin resin and flame retardant, which is used to provide basic flame retardant performance. The flame retardant can be aluminum hydroxide, magnesium hydroxide, triphenyl phosphate or tris (2,3-dibromopropyl) phosphate. The middle layer 6 is composed of polyolefin resin, flame retardant and antioxidant, which is used to further improve the flame retardant performance and antioxidant performance. The antioxidant can be a hindered phenol antioxidant or a phosphite antioxidant. The outer layer 7 is composed of polyolefin resin, flame retardant and lubricant, which is used to provide good wear resistance and weather resistance. The lubricant can be calcium stearate, zinc stearate or magnesium stearate.

[0032] In an embodiment of the present invention, the insulating layer 2 is made of the following raw materials in parts by weight: 100 parts of polyolefin resin; 15-25 parts of flame retardant; 1-3 parts of antioxidant; 0.5-1.5 parts of lubricant, the flame retardant is one or more of aluminum hydroxide, magnesium hydroxide, triphenyl phosphate or triester phosphate, the antioxidant is a hindered phenol antioxidant or a phosphite antioxidant, and the lubricant is calcium stearate, zinc stearate or magnesium stearate.

[0033] It should be noted that: the weight portion of polyolefin resin is 100 parts, which is used to provide basic insulation performance and mechanical strength. The weight portion of flame retardant is 15-25 parts, which is used to improve the flame retardant performance of the insulating layer 2 and reduce the risk of fire. Aluminum hydroxide has excellent flame retardant performance and environmental protection characteristics, and can suppress the spread of flames by absorbing heat and generating water vapor. Magnesium hydroxide has a flame retardant mechanism similar to aluminum hydroxide, and also has excellent high temperature resistance and corrosion resistance. Triphenyl phosphate has excellent flame retardant and plasticizing properties, and can suppress the spread of flames by generating free radicals. Tris phosphate has a flame retardant mechanism similar to triphenyl phosphate, and also has excellent weather resistance and UV resistance. The antioxidant is used to improve the antioxidant properties of the insulating layer 2, prevent the insulating layer 2 from oxidative aging during use, and extend the service life of the cable. The antioxidant can be a hindered phenol antioxidant or a phosphite antioxidant. The weight portion of the antioxidant is 1-3 parts, which is used to improve the antioxidant properties of the insulating layer 2 and extend the service life of the cable. The hindered phenol antioxidant has excellent antioxidant properties and heat resistance, and can inhibit the oxidation reaction by reacting with free radicals. The phosphite antioxidant has an antioxidant mechanism similar to that of the hindered phenol antioxidant and also has excellent hydrolysis resistance and weather resistance. The lubricant is used to improve the processing performance and surface smoothness of the insulating layer 2, which is convenient for the production and use of the cable. The lubricant can be calcium stearate, zinc stearate or magnesium stearate, and the weight portion of the lubricant is 0.5-1.5 parts. Calcium stearate has excellent lubrication performance and thermal stability, and can improve the processing performance by reducing the friction coefficient of the material. Zinc stearate has a lubrication mechanism similar to that of calcium stearate, and it also has excellent corrosion resistance and water resistance. Magnesium stearate has similar lubrication performance to calcium stearate and zinc stearate, and also has excellent weather resistance and UV resistance.

[0034] In the embodiment of the present invention, step 1, the conductor 1 is processed by wire drawing, twisting and other processes to obtain a conductor 1 of required specifications;

[0035] Step 2: After the raw materials of the insulating layer 2 are evenly mixed, they are extruded and coated on the conductor 1 through an extruder to form the insulating layer 2;

[0036] Step 3: After the raw materials of the flame retardant layer 3 and the environmental protection sleeve layer 4 are mixed evenly, they are extruded and coated on the insulating layer 2 by a co-extruder to form the flame retardant layer 3 and the environmental protection sleeve layer 4;

[0037] Step 4: Cool, pull, and reel the cable to obtain a finished cable.

[0038] It should be noted that: the conductor 1 is processed by wire drawing, twisting and other processes to obtain the conductor 1 of the required specifications. Wire drawing is to stretch the metal material (such as copper, aluminum) through a wire drawing machine to achieve the required diameter and surface quality. Twisting is to twist multiple single wires through a twisting machine to form the required conductor structure. Twisting can improve the mechanical strength and flexibility of the conductor. After the raw materials of the insulating layer 2 are mixed evenly, they are extruded and coated on the conductor 1 through an extruder to form the insulating layer 2. The raw materials are mixed, and the polyolefin resin, flame retardant, antioxidant and lubricant are mixed evenly according to the ratio to form the insulating layer raw materials. Extrusion coating is to extrude the insulating layer raw materials through an extruder so that it is coated on the conductor 1 to form the insulating layer 2. After the raw materials of the flame retardant layer 3 and the ring protective sheath layer 4 are mixed evenly, they are extruded and coated on the insulating layer 2 by a co-extruder to form the flame retardant layer 3 and the ring protective sheath layer 4. The raw materials of the flame retardant layer 3 and the ring protective sheath layer 4 are mixed evenly according to the ratio to form the flame retardant layer raw material and the ring protective sheath layer raw material. After co-extrusion coating, the flame retardant layer raw material and the ring protective sheath layer raw material are extruded by a co-extruder to coat the insulating layer 2 to form the flame retardant layer 3 and the ring protective sheath layer 4. The cable is subjected to subsequent treatments such as cooling, pulling, and winding to obtain a finished cable, cooling, cooling the extruded cable through a cooling water tank to achieve the desired size and shape, pulling, pulling the cooled cable through a traction machine to achieve the desired length and surface quality, and winding, winding the pulled cable through a winding machine to form a finished cable.

[0039] Comparative Example 1

[0040] A cable with flame retardant effect, comprising:

[0041] Conductor 1: Copper conductor is processed by wire drawing process to obtain the conductor of required specifications.

[0042] Insulating layer 2: Made of the following raw materials in parts by weight: 100 parts of polyolefin resin, 20 parts of flame retardant, 2 parts of antioxidant, and 1 part of lubricant, wherein the flame retardant is aluminum hydroxide, the antioxidant is a hindered phenol antioxidant, and the lubricant is calcium stearate.

[0043] Flame retardant layer 3: made of the following raw materials in parts by weight: 100 parts of polyolefin resin, 50 parts of flame retardant, 2 parts of antioxidant, and 1 part of lubricant, wherein the flame retardant is aluminum hydroxide, the antioxidant is a hindered phenol antioxidant, and the lubricant is calcium stearate.

[0044] The protective sleeve layer is made of the following raw materials in parts by weight: 100 parts of polyolefin resin, no flame retardant, 2 parts of antioxidant, and 1 part of lubricant, wherein the antioxidant is a hindered phenol antioxidant and the lubricant is calcium stearate.

[0045] A method for preparing a flame retardant cable comprises the following steps:

[0046] Step 1: Process the conductor 1 through wire drawing, twisting and other processes to obtain a conductor 1 of required specifications.

[0047] Step 2: After the raw materials of the insulating layer 2 are uniformly mixed, they are extruded and coated on the conductor 1 through an extruder to form the insulating layer 2.

[0048] Step 3: After the raw materials of the flame retardant layer 3 are mixed evenly, they are extruded and coated on the insulating layer 2 through an extruder to form the flame retardant layer 3.

[0049] Step 4: After the raw materials of the protective sleeve layer are mixed evenly, they are extruded and coated on the flame retardant layer 3 through an extruder to form a protective sleeve layer.

[0050] Step 5: Cool, pull, and reel the cable to obtain a finished cable.

[0051] Comparative Example 2

[0052] An environmentally friendly cable with flame retardant effect, comprising:

[0053] Conductor 1: Copper conductor is processed by wire drawing process to obtain the conductor of required specifications.

[0054] Insulation layer 2: Made of the following raw materials in parts by weight: 100 parts of polyolefin resin, 20 parts of flame retardant, 2 parts of antioxidant, and 1 part of lubricant. The flame retardant is a mixture of aluminum hydroxide and triphenyl phosphate, the antioxidant is a hindered phenol antioxidant, and the lubricant is calcium stearate.

[0055] Flame retardant layer 3: It is composed of inner layer 5, middle layer 6 and outer layer 7. The inner layer 5 is made of the following raw materials in parts by weight: 100 parts of polyolefin resin, 50 parts of flame retardant; the middle layer 6 is made of the following raw materials in parts by weight: 100 parts of polyolefin resin, 40 parts of flame retardant, 2 parts of antioxidant; the outer layer 7 is made of the following raw materials in parts by weight: 100 parts of polyolefin resin, 30 parts of flame retardant, 1 part of lubricant. Among them, the flame retardant is a mixture of aluminum hydroxide and triphenyl phosphate, the antioxidant is a hindered phenol antioxidant, and the lubricant is calcium stearate.

[0056] The ring protection sleeve layer 4 is made of the following raw materials in parts by weight: 100 parts of polyolefin resin, no flame retardant, 2 parts of antioxidant, and 1 part of lubricant, wherein the antioxidant is a hindered phenol antioxidant and the lubricant is calcium stearate.

[0057] A method for preparing a flame retardant cable comprises the following steps:

[0058] Step 1: Process the conductor 1 through wire drawing, twisting and other processes to obtain a conductor 1 of required specifications.

[0059] Step 2: After the raw materials of the insulating layer 2 are uniformly mixed, they are extruded and coated on the conductor 1 through an extruder to form the insulating layer 2.

[0060] Step 3: After the raw materials of the flame retardant layer 3 are mixed evenly, they are extruded and coated on the insulating layer 2 by a co-extruder to form the flame retardant layer 3.

[0061] Step 4: After the raw materials of the ring protection sleeve layer 4 are mixed evenly, they are extruded and coated on the flame retardant layer 3 through an extruder to form the ring protection sleeve layer 4.

[0062] Step 5: Cool, pull, and reel the cable to obtain a finished cable.

[0063] By comparing the above embodiments and comparative examples, the following conclusions can be drawn:

[0064] The environmentally friendly cable with flame retardant effect provided by the embodiment of the present invention can significantly improve the flame retardant performance and environmental protection characteristics of the cable by arranging a flame retardant layer 3 outside the insulating layer 2 and arranging an annular protective sheath layer 4 outside the flame retardant layer 3.

[0065] Compared with comparative example 1, the cable provided in the embodiment of the present invention has better environmental protection characteristics and can reduce pollution to the environment.

[0066] Compared with Comparative Example 2, the cable provided by the embodiment of the present invention has better comprehensive performance and can meet the requirements of flame retardancy and environmental protection at the same time.

[0067] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0068] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An environmentally friendly cable with flame retardant effect, characterized in that: include: Conductor (1), insulating layer (2), flame retardant layer (3) and ring protective sheath layer (4); The inner side of the insulating layer (2) is coated on the outer side of the conductor (1), the inner side of the flame retardant layer (3) is coated on the outer side of the insulating layer (2), and the inner side of the ring protective sleeve layer (4) is coated on the outer side of the flame retardant layer (3); The flame retardant layer (3) and the ring protection sleeve layer (4) are both composed of an inner layer (5), an intermediate layer (6) and an outer layer (7), and the inner layer (5), the intermediate layer (6) and the outer layer (7) are distributed in sequence from the inside to the outside.

2. The environmentally friendly cable with flame retardant effect according to claim 1, characterized in that: The insulating layer (2) is made of the following raw materials in parts by weight: 100 parts of polyolefin resin; 15-25 parts of flame retardant; 1-3 parts of antioxidant; and 0.5-1.5 parts of lubricant.

3. The environmentally friendly cable with flame retardant effect according to claim 2, characterized in that: The flame retardant is one or more of aluminum hydroxide, magnesium hydroxide, triphenyl phosphate or triester phosphate.

4. The environmentally friendly cable with flame retardant effect according to claim 3, characterized in that: The antioxidant is a hindered phenol antioxidant or a phosphite antioxidant.

5. The environmentally friendly cable with flame retardant effect according to claim 4, characterized in that: The lubricant is calcium stearate, zinc stearate or magnesium stearate.

6. The environmentally friendly cable with flame retardant effect according to claim 5, characterized in that: The inner layer (5) is made of the following raw materials in parts by weight: 100 parts of polyolefin resin; 40-60 parts of flame retardant.

7. The environmentally friendly cable with flame retardant effect according to claim 6, characterized in that: The intermediate layer (6) is made of the following raw materials in parts by weight: 100 parts of polyolefin resin; 30-50 parts of flame retardant; and 1-3 parts of antioxidant.

8. The environmentally friendly cable with flame retardant effect according to claim 7, characterized in that: The outer layer (7) is made of the following raw materials in parts by weight: 100 parts of polyolefin resin; 20-40 parts of flame retardant; and 0.5-1.5 parts of lubricant.

9. The environmentally friendly cable with flame retardant effect according to claim 8, characterized in that: The inner layer (5), the middle layer (6) and the outer layer (7) in the flame retardant layer 3 have the same material composition as the inner layer (5), the middle layer (6) and the outer layer (7) in the ring protection sleeve layer 4.

10. The method for preparing an environmentally friendly cable with flame retardant effect according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Processing the conductor (1) by wire drawing, twisting, etc. to obtain a conductor (1) of required specifications; Step 2: After the raw materials of the insulating layer (2) are uniformly mixed, the raw materials are extruded and coated on the conductor (1) through an extruder to form the insulating layer (2); Step 3: After the raw materials of the flame retardant layer (3) and the environmental protection sleeve layer (4) are mixed evenly, they are extruded and coated on the insulating layer (2) by a co-extruder to form the flame retardant layer (3) and the environmental protection sleeve layer (4); Step 4: Cool, pull, and reel the cable to obtain a finished cable.

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