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Smooth halogen-free low-smoke flame-retardant cable material and preparation method thereof

A low-smoke, flame-retardant and smooth technology, which is applied in the field of cable materials, can solve the problems of affecting the mechanical properties of cable materials, poor dispersion of flame retardants, and high friction coefficients, so as to reduce the accumulation of die heads and improve smoothness Performance and surface gloss, effect of improving dispersion performance

Pending Publication Date: 2021-05-11
中广核拓普(四川)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the flame retardant properties of cables are often achieved by adding flame retardants to the cable sheathing materials. Flame retardants include organic flame retardants and inorganic flame retardants. Organic flame retardants are based on bromine, phosphorus-nitrogen, and nitrogen Represented by red phosphorus and its compounds, inorganic flame retardants are mainly antimony trioxide, magnesium hydroxide, aluminum hydroxide and silicon-based flame retardants. Organic flame retardants have good affinity, but their environmental protection and safety There are disadvantages that are difficult to solve. When the inorganic flame retardant is added, the amount is large, which is easy to affect the mechanical properties of the cable material. During the processing, it may cause problems such as casting and surface roughness, resulting in a high friction coefficient.
In the actual application process, the surface layer of the cable is easily scratched or peeled off due to friction or collision, resulting in potential safety hazards
[0003] In the prior art, the surface of the cable is smoothed by adding a slip agent to the cable material. The addition of the slip agent is beneficial to reduce the friction coefficient of the cable material, improve the anti-blocking property of the cable material, and improve the performance of the cable, but directly Adding a slip agent cannot completely solve the problem of poor dispersion of flame retardants in cable materials

Method used

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  • Smooth halogen-free low-smoke flame-retardant cable material and preparation method thereof

Examples

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Effect test

preparation example Construction

[0024] The invention provides a method for preparing a smooth halogen-free low-smoke flame-retardant cable material and the cable material prepared therefrom. The preparation method includes the following steps:

[0025] S1. Prepare a highly dispersible flame retardant, which is a nano aluminum hydroxide flame retardant. The present invention prepares highly dispersed flame retardant and comprises the following steps:

[0026] S101. Add excessive ammonia solution to the aqueous aluminum chloride solution to react to obtain a colloid, and use distilled water to wash the colloid to remove Cl - , to obtain aluminum hydroxide colloid.

[0027] S102, performing a hydrothermal reaction on the washed colloid, and reacting under the conditions of a pressure of 40-60 MPa and a temperature of 250-350° C. to obtain an aluminum hydroxide gel. Wherein, the hydrothermal reaction uses water as the reaction medium, the filling degree is 80-90%, the reaction time is 5.5-6.5h, the particle si...

Embodiment 1

[0032] This example provides a method for preparing a smooth halogen-free low-smoke flame-retardant cable material and the cable material prepared therefrom. The preparation method includes the following steps:

[0033] S1, prepare highly dispersible flame retardant, preparation method is as follows:

[0034] S101. Gradually add ammonia water to the aluminum chloride aqueous solution to an excessive amount, and react to form a colloid. The reaction equation is as follows: AlCl 3 +3NH 4 OH→Al(OH) 3 ↓+3NH 4 Cl, separate the colloid generated by the reaction from the solvent, wash the separated colloid repeatedly with distilled water, remove the chloride ions carried on the colloid, and obtain the aluminum hydroxide colloid.

[0035] S102, carry out hydrothermal reaction to the aluminum hydroxide colloid obtained in S101, use water as the reaction medium, the filling degree is 80%, react at a pressure of 40 MPa and a temperature of 350° C. for 5.5 hours, after the reaction, ul...

Embodiment 2

[0040] The difference between the present embodiment and the first embodiment mainly lies in that in the hydrothermal reaction of S102, the filling degree is 90%, and the reaction is carried out for 6.5 hours under the environment of the pressure of 60 MPa and the temperature of 250°C. In the freeze-drying process of S103, first cool the aluminum hydroxide gel to 2°C, then place it in an environment of -40°C and a pressure of 13.5Pa for 3h, then reduce the pressure to 1.5Pa, and keep it at -60°C for 10h , heat the powder to 25°C to obtain a highly dispersible flame retardant. In S2, the added slip agent accounted for 0.05% by mass of the mixture, and then the mixture was placed in a sound field with a frequency of 25 Hz and a power of 2600 W for ultrasonic treatment.

[0041] In S3, the raw material consumption of weighing is as follows: the mixture that the S2 of 170kg makes, the polyolefin resin of 100kg, the antioxidant of 1.5kg and the lubricant of 2kg, the polyolefin resi...

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Abstract

The invention discloses a smooth halogen-free low-smoke flame-retardant cable material and a preparation method thereof, and belongs to the technical field of cable materials. The preparation method comprises the following steps: preparing a high-dispersity flame retardant; jointly carrying out ultrasonic treatment on the prepared high-dispersity flame retardant and a slipping agent; mixing the high-dispersity flame retardant and the slipping agent which are subjected to ultrasonic treatment with other raw materials for banburying, extrusion and grain-sized dicing, and obtaining the slipping type halogen-free low-smoke flame-retardant cable material after cooling. According to the cable material, the high-dispersity flame retardant is prepared, and the high-dispersity flame retardant and the slipping agent are jointly subjected to ultrasonic treatment, so that the surface energy of the nano flame retardant powder is further weakened, the dispersing performance of the flame retardant and the slipping agent is improved, agglomeration of flame retardant particles is prevented, and the slipping performance and the surface glossiness of the cable material are further improved.

Description

technical field [0001] The invention relates to a smooth halogen-free low-smoke flame-retardant cable material and a preparation method thereof, belonging to the technical field of cable materials. Background technique [0002] With the development of electric power and electronic information industry, the amount of cable used as a transmission medium has increased sharply. The cable sheath covered by the cable can insulate and protect the cable to ensure the physical and mechanical properties of the cable so that it can adapt to the laying conditions. and environmental aging, which is conducive to maintaining operational reliability and long service life. With the improvement of the safety performance requirements of cables, the flame retardant performance of cables has also received great attention. Other equipment will not be affected by the fire to avoid greater losses. At present, the flame retardant properties of cables are often achieved by adding flame retardants t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L51/06C08L23/00C08K13/02C08K3/22C08K5/20C01F7/34C01F7/44B82Y40/00H01B3/44
CPCC08L23/0853C01F7/34C01F7/44B82Y40/00H01B3/441C08K2201/011C08L2201/02C08L2201/22C08L2203/202C08K2003/2227C08L2205/02C08L2205/035C01P2004/64C08L23/06C08L51/06C08L23/00C08K13/02C08K3/22C08K5/20
Inventor 刘勇
Owner 中广核拓普(四川)新材料有限公司
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