CN113652044A

CN113652044A - Halogen-free low-smoke flame-retardant wire and cable and preparation method thereof

Info

Publication number: CN113652044A
Application number: CN202111091861.1A
Authority: CN
Inventors: 韩筱玉; 张希期
Original assignee: Wenzhou No 2 Wire Factory
Current assignee: Wenzhou No 2 Wire Factory
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2021-11-16

Abstract

The application relates to a halogen-free low-smoke flame-retardant wire cable and a preparation method thereof, the halogen-free low-smoke flame-retardant wire cable comprises a copper conductor and an insulating layer coated outside the copper conductor, wherein the insulating layer comprises the following components in parts by weight: 100-120 parts of polytetrafluoroethylene; 30-40 parts of 2- (4-methoxyphenyl) malondialdehyde; 5-6 parts of silicone resin; 12-15 parts of aluminum hydroxide; 8-10 parts of ricinoleic acid; 5-6 parts of p-nitrobenzaldehyde; 1-2 parts of a catalyst; a preparation method of a halogen-free low-smoke flame-retardant wire and cable comprises the preparation and cabling process of a wire and cable material of an insulating layer. The application has the following advantages and effects: 2- (4-methoxyphenyl) malondialdehyde is easy to combine with polytetrafluoroethylene, and has good effect of improving flame retardance; the aluminum hydroxide reduces the conduction thermal resistance and is not easy to ignite; in the presence of a catalyst, aluminum hydroxide is modified by a product of mixing ricinoleic acid and p-nitrobenzaldehyde to form a good bonding interface so as to form a continuous closed structure and improve the flame retardant property.

Description

Halogen-free low-smoke flame-retardant wire and cable and preparation method thereof

Technical Field

The application relates to the technical field of wires and cables, in particular to a halogen-free low-smoke flame-retardant wire and cable and a preparation method thereof.

Background

The electric wire and cable is a wire for transmitting electric energy, the existing electromagnetic wire is an insulated wire which generates a magnetic field after being electrified or induces and generates current in the magnetic field, the electric wire and cable is mainly used for a motor and a transformer coil and other related electromagnetic equipment, and the conductor of the electric wire and cable is mainly a copper wire and has a thin insulating layer, good electric and mechanical properties, heat resistance, moisture resistance, solvent resistance and the like.

The existing Chinese patent with publication number CN111145943A discloses a wire cable for a sensor, which comprises a cable core and a cable outer layer, wherein a plurality of cable cores are arranged in the cable outer layer, and each cable core is composed of a plurality of strands of stranded superfine bare copper wires and an outer layer of low-carbon polymer fireproof insulator layer.

Aiming at the related technologies, in the use of the current electric wire and cable, when the environmental temperature rises, the average activation energy of oxygen molecules is increased, the effective rate of the combination with the organic materials of the electric wire and cable is easily enhanced, and simultaneously, more organic materials in the electric wire and cable are promoted to be cracked and gasified in unit time; therefore, some current wires and cables are prone to have a significant decrease in oxygen index and a decrease in flame retardant performance at elevated ambient temperatures, and thus the inventors believe that improvements are still needed.

Disclosure of Invention

In order to keep the flame retardant property of the wire and cable under the condition of increasing the environmental temperature, the application provides a halogen-free low-smoke flame retardant wire and cable and a preparation method thereof.

In a first aspect, the application provides a halogen-free low-smoke flame-retardant wire and cable which adopts the following technical scheme:

the utility model provides a there is not steamed low fire-retardant wire and cable of cigarette, includes copper conductor and the insulating layer of cladding outside the copper conductor, the insulating layer includes the component of following part by weight:

100-120 parts of polytetrafluoroethylene;

30-40 parts of 2- (4-methoxyphenyl) malondialdehyde;

5-6 parts of silicone resin;

12-15 parts of aluminum hydroxide;

8-10 parts of ricinoleic acid;

5-6 parts of p-nitrobenzaldehyde;

1-2 parts of a catalyst.

By adopting the technical scheme, the polytetrafluoroethylene film can not be corroded by grease, organic solvents, alkalis, acids and salt mist, has good electrical insulation performance and also has good low-temperature performance, wear resistance and gas barrier property, aldehyde groups and methoxy groups are contained in the molecules of the 2- (4-methoxyphenyl) malonaldehyde, the chemical property is more active, the polytetrafluoroethylene film is easy to combine with polytetrafluoroethylene, and tests prove that the polytetrafluoroethylene film has good effect of improving flame retardance; the addition of the silicone resin improves the anti-dripping property and the flame-retardant smoke-suppression property; the addition of the aluminum hydroxide increases the heat capacity of the wire and cable, reduces the conduction thermal resistance, decomposes and evaporates crystal water at high temperature, and converts the crystal water into an aluminum oxide hard shell to wrap the periphery of the copper conductor, so that the wire and cable are not easy to ignite under the high-temperature condition; in the presence of a catalyst, ricinoleic acid and p-nitrobenzaldehyde are mixed, the obtained product and the surface of the flame-retardant inorganic aluminum hydroxide can react with each other to form a new chemical bond through adsorption and bonding, the distance between the aluminum hydroxide is increased, the van der Waals force is reduced, and meanwhile, the product plays a role of a molecular bridge, is fully dispersed on the surface of the aluminum hydroxide and is coated more completely, so that a good bonding interface is formed between the aluminum hydroxide and other organic matters, a continuous closed structure is formed between molecules, and the flame retardant property is improved.

Preferably, the insulating layer further comprises 6-8 parts of carbon black, 3-4 parts of caprolactam and 0.8-1 part of caprylic acid in parts by weight.

By adopting the technical scheme, under the acidic condition of the existence of caprylic acid, carbon black is oxidized, a large number of oxygen-containing polar groups are added on the surface of the carbon black, and meanwhile, a large number of holes and cracks are generated on the surface of the carbon black, so that the carbon black can adsorb flame-retardant monomer caprolactam to obtain a product with a low-dimensional structure and a porous form, the product with the porous form is dispersed in an insulating layer mixture, the porous form products between layers which are mutually superposed form mutually staggered air heat insulation layers, and air is a good heat insulator and can play a role in preventing a heat source from spreading to an inner layer together with other components such as polytetrafluoroethylene and the like under the synergistic effect to better protect the inner layer.

Preferably, the weight ratio of carbon black: caprolactam: octanoic acid =7:4: 1.

Preferably, the insulating layer further comprises 4-5 parts of dicyandiamide, 1-2 parts of 3, 4-epoxy-1-butene and 0.3-0.4 part of accelerator by weight.

By adopting the technical scheme, the dicyandiamide has the advantages of small smoke amount and small influence on the environment, compared with melamine, the dicyandiamide is easier to react with 3, 4-epoxy-1-butylene, and has a certain curing effect, so that an oxygen barrier layer with higher flame retardant property is formed by the reaction of the dicyandiamide and the 3, 4-epoxy-1-butylene, the emission of smoke and toxic gas can be further reduced, the flame diffusion is prevented, and the excellent flame retardant property is achieved.

Preferably, the composition of the insulating layer further comprises 0.4-0.5 parts of poly (4-methoxystyrene).

By adopting the technical scheme, in the presence of a ricinoleic acid solvent, the poly (4-methoxystyrene) can be further added to generate crosslinking copolymerization with 3, 4-epoxy-1-butylene, so that a more compact oxygen isolation layer is formed, and the flame retardant property of the wire and cable is improved in an auxiliary manner.

Preferably, the promoter is N, N-carbonyldiimidazole.

By adopting the technical scheme, the N, N-carbonyl diimidazole can initiate the ring opening of the epoxy group, the reaction completeness of the 3, 4-epoxy-1-butene and the dicyandiamide is improved, the reaction rate is improved, and the performance of a product obtained by the reaction of the 3, 4-epoxy-1-butene and the dicyandiamide is more ideal.

Preferably, the catalyst is tellurium tetrachloride.

In a second aspect, the application provides a preparation method of a halogen-free low-smoke flame-retardant wire and cable, which adopts the following technical scheme:

a preparation method of a halogen-free low-smoke flame-retardant wire and cable comprises the following steps:

s1, preparing a wire and cable material of an insulating layer; mixing ricinoleic acid and a catalyst, heating to 50-60 ℃, adding p-nitrobenzaldehyde while stirring, and reacting for 20-28 min; then adding aluminum hydroxide, continuously stirring for 30-40min at the rotating speed of 180-200r/min, and naturally cooling to room temperature to obtain modified aluminum hydroxide;

mixing polytetrafluoroethylene and 2- (4-methoxyphenyl) malondialdehyde, and banburying in an internal mixer at 40-50 deg.C for 30-35 min; heating to 80-90 ℃, adding the silicon resin, and continuing to mix for 1-1.5 h; then adding modified aluminum hydroxide, and mixing for 50-60min to obtain a wire and cable material;

s2, a cabling process; obtaining a copper conductor after wire drawing and stranding; controlling the temperature at 160-; and sleeving the insulating layer outside the copper conductor to obtain the wire cable.

Preferably, the preparation method of the halogen-free low-smoke flame-retardant wire and cable, S1, further includes the following steps:

mixing 6-8 parts of carbon black and 0.8-1 part of caprylic acid, stirring for 8-10min, adding 3-4 parts of caprolactam, controlling the reaction temperature to be 30-35 ℃, and reacting for 1-2h under the protection of nitrogen to obtain modified carbon black, wherein the obtained modified carbon black is divided into 2 parts;

mixing 1-2 parts of 3, 4-epoxy-1-butene and 0.3-0.4 part of accelerator, stirring for 12-15min, adding 4-5 parts of dicyandiamide and 0.4-0.5 part of poly (4-methoxystyrene), heating to 50-60 ℃, and stirring for 40-50min to obtain a copolymerization product;

mixing 100-120 parts of polytetrafluoroethylene and 30-40 parts of 2- (4-methoxyphenyl) malonaldehyde, and banburying in an internal mixer at 40-50 ℃ for 30-35 min; adding 1 part of modified carbon black, and continuously stirring for 5-8 min; adding the copolymerization product, stirring for 30-40min, adding the rest 1 part of modified carbon black, and continuing stirring for 5-8 min; heating to 80-90 ℃, adding 5-6 parts of silicon resin, and continuously mixing for 1-1.5 h; and then adding modified aluminum hydroxide, and mixing for 50-60min to obtain the wire and cable material.

To sum up, the application comprises the following beneficial technical effects:

1.2- (4-methoxyphenyl) malonaldehyde contains aldehyde group and methoxyl group in molecule, has active chemical property, is easy to combine with polytetrafluoroethylene, and has good effect of improving flame retardance proved by tests; the aluminum hydroxide increases the heat capacity of the electric wire and the electric cable, reduces the conduction thermal resistance and is not easy to ignite; in the presence of a catalyst, aluminum hydroxide is modified by a product of mixing ricinoleic acid and p-nitrobenzaldehyde, so that a good bonding interface is formed between the aluminum hydroxide and other organic matters, a continuous closed structure is formed between molecules, and the flame retardant property is improved;

2. under the acidic condition of the existence of caprylic acid, a large number of oxygen-containing polar groups are added on the surface of carbon black, a large number of holes and cracks are generated, the carbon black is favorable for adsorbing a flame-retardant monomer caprolactam, a product with a low-dimensional structure and a porous form is obtained, the porous form product is dispersed in an insulating layer mixture, the porous form products between layers which are mutually overlapped form mutually staggered air heat insulation layers, and air is a good heat insulator, so that the heat source is prevented from spreading to the inner layer, and the flame-retardant effect is improved;

3. dicyandiamide has the advantages of small smoke amount and small influence on the environment, and has a certain curing effect, and the dicyandiamide and 3, 4-epoxy-1-butene react to form an oxygen barrier layer with higher flame retardant property by initiating the ring opening of an epoxy group through N, N-carbonyldiimidazole; meanwhile, in the presence of a ricinoleic acid solvent, the poly (4-methoxystyrene) can be further added to generate cross-linking copolymerization with 3, 4-epoxy-1-butylene, so that the emission of smoke and toxic gas is further reduced, flame diffusion is prevented, and the flame retardant has excellent flame retardant property.

Detailed Description

The present application is described in further detail below.

In this application, polytetrafluoroethylene is available from Suzhou Ming le plastication, Inc., brand U.S. 3M, brand TF 4305; silicone resin MQ silicone resin manufactured by Shandong national chemical Co., Ltd; carbon black, N550, produced by the middle rubber group carbon black industry research design institute; poly (4-methoxystyrene) is manufactured by Shandong Minye chemical Co., Ltd.

The raw materials used in the following embodiments may be those conventionally commercially available unless otherwise specified.

The screw extruder is a 90-type plastic single screw extruder with the length-diameter ratio of 20.

Examples

Example 1

The embodiment discloses a halogen-free low-smoke flame-retardant wire and cable and a preparation method thereof; the utility model provides a there is not steamed low fire-retardant wire and cable of cigarette, includes copper conductor and the insulating layer of cladding outside the copper conductor, the insulating layer includes following component: polytetrafluoroethylene, 2- (4-methoxyphenyl) malondialdehyde, silicone resin, aluminum hydroxide, ricinoleic acid, p-nitrobenzaldehyde and a catalyst, wherein the catalyst is tellurium tetrachloride.

s1, preparing a wire and cable material of an insulating layer; mixing ricinoleic acid and a catalyst, heating to 50 ℃, adding p-nitrobenzaldehyde while stirring, and reacting for 20 min; adding aluminum hydroxide, continuously stirring at the rotating speed of 180r/min for 30min, and naturally cooling to room temperature to obtain modified aluminum hydroxide;

mixing polytetrafluoroethylene and 2- (4-methoxyphenyl) malondialdehyde, and banburying in an internal mixer at 40 deg.C for 30 min; heating to 80 ℃, adding the silicon resin, and continuing to mix for 1 h; then adding modified aluminum hydroxide, and mixing for 50min to obtain a wire and cable material;

s2, a cabling process; obtaining a copper conductor after wire drawing and stranding; controlling the temperature to be 160 ℃, extruding the wire and cable material by a screw extruder at a screw rotation speed of 20r/min through an extrusion die to form an insulating layer, and molding and cooling the insulating layer; and sleeving the insulating layer outside the copper conductor to obtain the wire cable.

The contents of the components are shown in table 1 below.

Example 2

s1, preparing a wire and cable material of an insulating layer; mixing ricinoleic acid and a catalyst, heating to 60 ℃, adding p-nitrobenzaldehyde while stirring, and reacting for 28 min; adding aluminum hydroxide, continuously stirring at the rotating speed of 200r/min for 40min, and naturally cooling to room temperature to obtain modified aluminum hydroxide;

mixing polytetrafluoroethylene and 2- (4-methoxyphenyl) malondialdehyde, and banburying in an internal mixer at 50 deg.C for 35 min; heating to 90 ℃, adding the silicon resin, and continuing to mix for 1.5 h; then adding modified aluminum hydroxide, and mixing for 60min to obtain a wire and cable material;

s2, a cabling process; obtaining a copper conductor after wire drawing and stranding; controlling the temperature to be 170 ℃, extruding the wire and cable material by a screw extruder with the screw rotating speed of 22r/min through an extrusion die to form an insulating layer, and molding and cooling the insulating layer; and sleeving the insulating layer outside the copper conductor to obtain the wire cable.

The contents of the components are shown in table 1 below.

Example 3

s1, preparing a wire and cable material of an insulating layer; mixing ricinoleic acid and a catalyst, heating to 55 ℃, adding p-nitrobenzaldehyde while stirring, and reacting for 25 min; adding aluminum hydroxide, continuously stirring at the rotating speed of 190r/min for 35min, and naturally cooling to room temperature to obtain modified aluminum hydroxide;

mixing polytetrafluoroethylene and 2- (4-methoxyphenyl) malondialdehyde, and banburying in an internal mixer at 45 deg.C for 32 min; heating to 85 ℃, adding the silicon resin, and continuously mixing for 1.2 h; then adding modified aluminum hydroxide, and mixing for 55min to obtain a wire and cable material;

s2, a cabling process; obtaining a copper conductor after wire drawing and stranding; controlling the temperature to be 165 ℃, extruding the wire and cable material by a screw extruder at a screw rotation speed of 21r/min through an extrusion die to form an insulating layer, and molding and cooling the insulating layer; and sleeving the insulating layer outside the copper conductor to obtain the wire cable.

The contents of the components are shown in table 1 below.

Example 4

The difference from the embodiment 1 is that the halogen-free low-smoke flame-retardant wire and cable comprises a copper conductor and an insulating layer coated outside the copper conductor, wherein the insulating layer comprises the following components: polytetrafluoroethylene, 2- (4-methoxyphenyl) malondialdehyde, silicone, aluminum hydroxide, ricinoleic acid, p-nitrobenzaldehyde, catalysts, carbon black, caprolactam, octanoic acid, dicyandiamide, 3, 4-epoxy-1-butene, accelerators, and poly (4-methoxystyrene); wherein the catalyst is tellurium tetrachloride, and the accelerant is N, N-carbonyl diimidazole.

A preparation method of a halogen-free low-smoke flame-retardant wire and cable comprises the following steps of S1:

mixing ricinoleic acid and a catalyst, heating to 50 ℃, adding p-nitrobenzaldehyde while stirring, and reacting for 20 min; adding aluminum hydroxide, continuously stirring at the rotating speed of 180r/min for 30min, and naturally cooling to room temperature to obtain modified aluminum hydroxide;

mixing and stirring carbon black and caprylic acid for 8min, adding caprolactam, controlling the reaction temperature to be 30 ℃, and reacting for 1h under the nitrogen protection condition to obtain modified carbon black, wherein the obtained modified carbon black is divided into 2 parts;

mixing 3, 4-epoxy-1-butene with an accelerator, stirring for 12min, adding dicyandiamide and poly (4-methoxystyrene), heating to 50 ℃, and stirring for 40min to obtain a copolymerization product;

mixing polytetrafluoroethylene and 2- (4-methoxyphenyl) malondialdehyde, and banburying in an internal mixer at 40 deg.C for 30 min; adding 1 part of modified carbon black, and continuously stirring for 5 min; adding the copolymerization product, stirring for 30min, adding the rest 1 part of modified carbon black, and continuing stirring for 5 min; heating to 80 ℃, adding the silicon resin, and continuing to mix for 1 h; and then adding modified aluminum hydroxide, and mixing for 50min to obtain the wire and cable material.

The contents of the components are shown in table 1 below.

Example 5

mixing ricinoleic acid and a catalyst, heating to 60 ℃, adding p-nitrobenzaldehyde while stirring, and reacting for 28 min; adding aluminum hydroxide, continuously stirring at the rotating speed of 200r/min for 40min, and naturally cooling to room temperature to obtain modified aluminum hydroxide;

mixing and stirring carbon black and caprylic acid for 10min, adding caprolactam, controlling the reaction temperature to be 35 ℃, and reacting for 2h under the nitrogen protection condition to obtain modified carbon black, wherein the obtained modified carbon black is divided into 2 parts;

mixing 3, 4-epoxy-1-butene with an accelerator, stirring for 15min, adding dicyandiamide and poly (4-methoxystyrene), heating to 60 ℃, and stirring for 50min to obtain a copolymerization product;

mixing polytetrafluoroethylene and 2- (4-methoxyphenyl) malondialdehyde, and banburying in an internal mixer at 50 deg.C for 35 min; adding 1 part of modified carbon black, and continuously stirring for 8 min; adding the copolymerization product, stirring for 40min, adding the rest 1 part of modified carbon black, and continuing stirring for 8 min; heating to 90 ℃, adding the silicon resin, and continuing to mix for 1.5 h; and then adding modified aluminum hydroxide, and mixing for 60min to obtain the wire and cable material.

The contents of the components are shown in table 1 below.

Example 6

mixing ricinoleic acid and a catalyst, heating to 55 ℃, adding p-nitrobenzaldehyde while stirring, and reacting for 25 min; adding aluminum hydroxide, continuously stirring at the rotating speed of 190r/min for 35min, and naturally cooling to room temperature to obtain modified aluminum hydroxide;

mixing and stirring carbon black and caprylic acid for 9min, adding caprolactam, controlling the reaction temperature to be 32 ℃, and reacting for 1.5h under the nitrogen protection condition to obtain modified carbon black, wherein the obtained modified carbon black is divided into 2 parts;

mixing 3, 4-epoxy-1-butene with an accelerator, stirring for 13min, adding dicyandiamide and poly (4-methoxystyrene), heating to 55 ℃, and stirring for 45min to obtain a copolymerization product;

mixing polytetrafluoroethylene and 2- (4-methoxyphenyl) malondialdehyde, and banburying in an internal mixer at 45 deg.C for 32 min; adding 1 part of modified carbon black, and continuously stirring for 7 min; adding the copolymerization product, stirring for 35min, adding the rest 1 part of modified carbon black, and continuing stirring for 7 min; heating to 85 ℃, adding the silicon resin, and continuing to mix for 1.2 h; and then adding modified aluminum hydroxide, and mixing for 55min to obtain the wire and cable material.

The contents of the components are shown in table 1 below.

Example 7

The difference from example 1 is that the components of the insulating layer further include carbon black, caprolactam and caprylic acid, and the contents of the respective components are shown in the following table 2-1.

Example 8

The difference from the embodiment 7 is that, according to the weight portion ratio, the carbon black: caprolactam: octanoic acid =7:4:1, and the contents of the respective components are shown in table 2-1 below.

Example 9

The difference from example 7 is that carbon black was replaced with diatomaceous earth, and the contents of the respective components are shown in the following Table 2-1.

Example 10

The difference from example 7 is that caprolactam was replaced by aniline and the contents of the components are shown in the following Table 2-1.

Example 11

The difference from example 7 is that octanoic acid was replaced with sodium hydroxide and the contents of the respective components are shown in the following Table 2-1.

Example 12

The difference from example 1 is that the composition of the insulating layer further includes dicyandiamide, 3, 4-epoxy-1-butene and N, N-carbonyldiimidazole as a promoter, and the contents of the respective components are shown in the following table 2-2.

Example 13

The difference from example 12 is that dicyandiamide was replaced with melamine, and the contents of the respective components are shown in tables 2 to 2 below.

Example 14

The difference from example 12 is that 3, 4-epoxy-1-butene was replaced with 1-butene, and the contents of the respective components are shown in the following Table 2-2.

Example 15

The difference from example 12 is that the accelerator N, N-carbonyldiimidazole is replaced by N-methylindole, and the contents of the respective components are shown in the following tables 2 to 2.

Example 16

The difference from example 12 is that the composition of the insulating layer further includes poly (4-methoxystyrene), and the content of each component is shown in table 2-2 below.

Example 17

The difference from example 16 is that poly (4-methoxystyrene) was replaced with p-methoxyacetophenone, and the contents of the respective components are shown in the following Table 2-2.

Example 18

The difference from example 16 is that 3, 4-epoxy-1-butene was replaced with propylene oxide and the contents of the respective components are shown in the following Table 2-2.

Example 19

The difference from example 1 is that the catalyst tellurium tetrachloride was replaced by palladium dichloride.

Comparative example

Comparative example 1

The difference from example 1 is that the composition of the insulating layer is only 100 parts of polytetrafluoroethylene.

Comparative example 2

The difference from example 1 is that the polytetrafluoroethylene was replaced by HDPE and the components are shown in table 3 below.

Comparative example 3

The difference from comparative example 2 is that 2- (4-methoxyphenyl) malondialdehyde was replaced with benzaldehyde, and the contents of the components are shown in table 3 below.

Comparative example 4

The difference from example 1 is that ricinoleic acid was replaced with stearic acid, and the contents of the respective components are shown in table 3 below.

Comparative example 5

The difference from comparative example 4 is that p-nitrobenzaldehyde is replaced by acetophenone, and the contents of the components are shown in table 3 below.

Comparative example 6

The difference from comparative example 5 is that aluminum hydroxide was replaced with magnesium hydroxide and the contents of the respective components are shown in table 3 below.

Comparative example 7

The difference from example 1 is that the silicone resin was not added and the content of each component is shown in table 3 below.

TABLE 1 ingredient content tables for examples 1-6

	Example 1	Example 2	Example 3	Example 4	Example 5	Example 6
							Polytetrafluoroethylene	100	120	110	100	120	110
2- (4-methoxyphenyl) propanedialdehyde	30	40	35	30	40	35
							Silicone resin	5	6	5	5	6	5
Aluminum hydroxide	12	15	13	12	15	13
							Ricinoleic acid	8	10	9	8	10	9
Para-nitrobenzaldehyde	5	6	5	5	6	5
							Catalyst and process for preparing same	1	2	1	1	2	1
Carbon black	/	/	/	6	8	7
							Caprolactam	/	/	/	3	4	3
Octanoic acid	/	/	/	0.8	1	0.9
							Dicyandiamide	/	/	/	4	5	4
3, 4-epoxy-1-butene	/	/	/	1	2	2
							Accelerator	/	/	/	0.3	0.4	0.3
Poly (4-methoxystyrene)	/	/	/	0.4	0.5	0.4

TABLE 2-1 ingredient content tables for examples 7-11

	Example 7	Example 8	Example 9	Example 10	Example 11
						Polytetrafluoroethylene/HDPE	100	100	100	100	100
2- (4-methoxyphenyl) malondialdehyde/benzaldehyde	30	30	30	30	30
						Silicone resin	5	5	5	5	5
Aluminum hydroxide/magnesium hydroxide	12	12	12	12	12
						Ricinoleic/stearic acid	8	8	8	8	8
P-nitrobenzaldehyde/acetophenone	5	5	5	5	5
						Catalyst and process for preparing same	1	1	1	1	1
Carbon black/diatomaceous earth	6	7	6	6	6
						Caprolactam/aniline	3	4	3	3	3
Octanoic acid/sodium hydroxide	0.8	1	0.8	0.8	0.8
						Dicyandiamide/melamine	/	/	/	/	/
3, 4-epoxy-1-butene/propylene oxide	/	/	/	/	/
						Accelerator	/	/	/	/	/
Poly (4-methoxystyrene)/p-methoxyacetophenone	/	/	/	/	/

Tables 2-2 component content tables of examples 12-18

	Example 12	Example 13	Example 14	Example 15	Example 16	Example 17	Example 18
								Polytetrafluoroethylene/HDPE	100	100	100	100	100	100	100
2- (4-methoxyphenyl) malondialdehyde/benzaldehyde	30	30	30	30	30	30	30
								Silicone resin	5	5	5	5	5	5	5
Aluminum hydroxide/magnesium hydroxide	12	12	12	12	12	12	12
								Ricinoleic/stearic acid	8	8	8	8	8	8	8
P-nitrobenzaldehyde/acetophenone	5	5	5	5	5	5	5
								Catalyst and process for preparing same	1	1	1	1	1	1	1
Carbon black/diatomaceous earth	/	/	/	/	/	/	/
								Caprolactam/aniline	/	/	/	/	/	/	/
Octanoic acid/sodium hydroxide	/	/	/	/	/	/	/
								Dicyandiamide/melamine	4	4	4	4	4	4	4
3, 4-epoxy-1-butene/propylene oxide	1	1	1	1	1	1	1
								Accelerator	0.3	0.3	0.3	0.3	0.3	0.3	0.3
Poly (4-methoxystyrene)/p-methoxyacetophenone	/	/	/	/	0.4	0.4	0.4

TABLE 3 ingredient content of comparative examples 2 to 7

	Comparative example 2	Comparative example 3	Comparative example 4	Comparative example 5	Comparative example 6	Comparative example 7
							Polytetrafluoroethylene/HDPE	100	100	100	100	100	100
2- (4-methoxyphenyl) malondialdehyde/benzaldehyde	30	30	30	30	30	30
							Silicone resin	5	5	5	5	5	/
Aluminum hydroxide/magnesium hydroxide	12	12	12	12	12	12
							Ricinoleic/stearic acid	8	8	8	8	8	8
P-nitrobenzaldehyde/acetophenone	5	5	5	5	5	5
							Catalyst and process for preparing same	1	1	1	1	1	1

Performance test

1) Low smoke and zero halogen test; through detection, all performance indexes of the electric wires and cables in the embodiments 1 to 6 meet the standard requirements; wherein, the photopic rate in the smoke concentration index is 81-85%, which is more than 80% of the minimum light transmittance of Guidong in GA306-2001 standard, which shows that the low smoke performance is excellent; the smoke toxicity index is detected as the second grade of the standard safety level (ZA 2) according to the standard GA 132-1996; the emission amount of the haloid acid gas is detected to be 0.5-2mg/g, and the standard that the emission amount of the haloid acid gas is less than or equal to 5mg/g in the Q/SCL0410-1997 product standard is met.

2) Testing the flame retardant property; the flame retardance is characterized by an oxygen index, wherein the oxygen index refers to the minimum oxygen concentration required by the material in an oxygen-nitrogen mixed gas flow just to keep a combustion state; in the application, the test environment temperature is 40 ℃, and the higher the oxygen index is at the temperature, the better the flame retardant property is at high temperature; the test results of each example and comparative example are shown in table 4 below.

TABLE 4 flame retardancy test results of examples and comparative examples

	Oxygen Index (OI)
		Example 1	21
Example 2	26
		Example 3	23
Example 4	27
		Example 5	31
Example 6	29
		Example 7	25
Example 8	26
		Practice ofExample 9	23
Example 10	23
		Example 11	22
Example 12	24
		Example 13	22
Example 14	22
		Example 15	22
Example 16	25
		Example 17	24
Example 18	23
		Example 19	20
Comparative example 1	17
		Comparative example 2	19
Comparative example 3	18
		Comparative example 4	20
Comparative example 5	19
		Comparative example 6	18
Comparative example 7	19

In summary, the following conclusions can be drawn:

the co-addition of carbon black, caprolactam and caprylic acid and the synergistic addition of dicyandiamide, 3, 4-epoxy-1-butene, an accelerator N, N-carbonyldiimidazole and poly (4-methoxystyrene) have a promoting effect on improving the flame retardance of the electric wire and cable; the wire and cable manufactured by the technical scheme of the application still have good flame retardance at a certain high temperature.

The present embodiment is only for explaining the present application, and the protection scope of the present application is not limited thereby, and those skilled in the art can make modifications to the present embodiment without inventive contribution as needed after reading the present specification, but all are protected by patent law within the scope of the claims of the present application.

Claims

1. The utility model provides a there is not steamed low fire-retardant wire and cable of cigarette, includes copper conductor and the cladding insulating layer outside the copper conductor, its characterized in that: the insulating layer comprises the following components in parts by weight:

100-120 parts of polytetrafluoroethylene;

30-40 parts of 2- (4-methoxyphenyl) malondialdehyde;

5-6 parts of silicone resin;

12-15 parts of aluminum hydroxide;

8-10 parts of ricinoleic acid;

5-6 parts of p-nitrobenzaldehyde;

1-2 parts of a catalyst.

2. The halogen-free low-smoke flame-retardant wire and cable according to claim 1, characterized in that: the insulating layer further comprises 6-8 parts of carbon black, 3-4 parts of caprolactam and 0.8-1 part of caprylic acid in parts by weight.

3. The halogen-free low-smoke flame-retardant wire and cable according to claim 2, characterized in that: according to the weight portion ratio, carbon black: caprolactam: octanoic acid =7:4: 1.

4. The halogen-free low-smoke flame-retardant wire and cable according to claim 1, characterized in that: the insulating layer further comprises, by weight, 4-5 parts of dicyandiamide, 1-2 parts of 3, 4-epoxy-1-butene and 0.3-0.4 part of an accelerator.

5. The halogen-free low-smoke flame-retardant wire and cable according to claim 4, characterized in that: the insulating layer also comprises 0.4-0.5 part of poly (4-methoxy styrene).

6. The halogen-free low-smoke flame-retardant wire and cable according to claim 4, characterized in that: the accelerant is N, N-carbonyl diimidazole.

7. The halogen-free low-smoke flame-retardant wire and cable according to claim 1, characterized in that: the catalyst is tellurium tetrachloride.

8. The preparation method of the halogen-free low-smoke flame-retardant wire and cable as claimed in claim 1, characterized by comprising the following steps:

9. The preparation method of the halogen-free low-smoke flame-retardant wire and cable according to claim 8 is characterized in that: the S1 further includes the steps of: