Flame-retardant fireproof belting material as well as preparation method and application thereof

Abstract

The invention discloses a flame-retardant fireproof belting material and a preparation method and application thereof, and the preparation method comprises the following steps: S1, dipping glass fabric in a mixed solution of trihydroxymethyl phosphorus oxide and ethylene glycol, and carrying out first X-ray irradiation; and S2, dipping the glass fabric prepared in the step S1 in a mixed aqueous emulsion of polyacrylic acid and N-(hydroxymethyl) acrylamide, and carrying out second X-ray irradiation. According to the invention, trihydroxymethyl phosphorus oxide and N-(hydroxymethyl) acrylamide as flame retardants and glue (polyacrylic acid) are better connected to the glass fabric through X-ray irradiation. The trihydroxymethyl phosphorus oxide and the N-(hydroxymethyl) acrylamide have flame retardance and are combined with the glass fabric under the action of hydroxyl, so that the glass fabric has flame retardance. Meanwhile, the flame retardants are organic small molecules, and the phosphorus-nitrogen flame retardant is chemically bonded with the glass fabric through chemical bonds on the molecular level, so that a very good plasticizing and toughening effect is achieved.

Description

Technical Field

[0001] The invention relates to a new cable material, in particular to a flame retardant and fire resistant tape material and a preparation method and application thereof. Background Art

[0002] Cables are used in many fields such as power transmission and signal transmission, and are an industry with a very large economic output value in my country. Cable tapes play many important roles in wires and cables, mainly including enhancing insulation and protection, improving mechanical strength, shielding electromagnetic interference, and realizing specific functions.

[0003] Cable tape is tightly wrapped around the cable core or outer insulation layer to effectively prevent current leakage and electromagnetic interference, ensuring safe isolation between conductors and between conductors and the external environment. At the same time, it can also enhance mechanical strength and prevent malfunctions or damage caused by external forces.

[0004] Cable tape can significantly enhance the cable's resistance to compression, tension and twisting, and protect the cable from wear in harsh environments such as moisture, thereby extending its service life and reducing the failure rate. In addition, it can prevent the cable from loosening and maintain the cylindrical structure of the wire. Shielding electromagnetic interference: Cable tape has a shielding function, which can prevent the signal from interference and ensure the quality and stability of signal transmission. It acts as an insulator between the conductor and the shielding wire, further ensuring the transmission effect of the signal.

[0005] With the advancement of science and technology, the improvement of quality of life, people's requirements for the environment are getting higher and higher. The development of environmentally friendly flame-retardant cables can avoid or reduce the loss of property caused by fire accidents. However, the current flame-retardant cable tapes mostly use inorganic flame retardants, which have limited flame retardant effects on one hand, and reduce the flexibility of the tapes on the other hand, shortening the service life of the cables. Summary of the invention

[0006] In view of the problem that the use of inorganic flame retardants leads to limited improvement in the flame retardant performance and decreased flexibility of cable tapes, the present invention provides a flame retardant and fire-resistant tape material and a preparation method and application thereof. The flame retardant and fire-resistant tape has both good flexibility and good halogen-free flame retardant properties.

[0007] In order to achieve the above object, the present invention provides a method for preparing a flame retardant and fire resistant tape material, which comprises the following steps: S1, immersing the glass fiber cloth in a mixed solution of trimethylolphosphine oxide and ethylene glycol, and performing the first X-ray irradiation; S2, immersing the glass fiber cloth obtained in step S1 in a mixed aqueous emulsion of polyacrylic acid and N-(hydroxymethyl)acrylamide, and performing a second X-ray irradiation.

[0008] In the present invention, the glass fiber cloth is immersed in a mixed solution of trimethylol phosphorus oxide and ethylene glycol, and the first X-ray irradiation is performed; then the prepared glass fiber cloth is immersed in a mixed aqueous emulsion of polyacrylic acid and N-(hydroxymethyl) acrylamide, and the second X-ray irradiation is performed. The purpose is to better connect the flame retardant trimethylol phosphorus oxide and N-(hydroxymethyl) acrylamide, as well as the glue (polyacrylic acid) to the glass fiber cloth through X-ray irradiation. At the same time, during the second irradiation process, trimethylol phosphorus oxide and N-(hydroxymethyl) acrylamide can react better. Moreover, N-(hydroxymethyl) acrylamide and polyacrylic acid are better bonded together through double bonds through X-rays. In this process, X-ray irradiation is performed, and trimethylol phosphorus oxide reacts with hydroxyl groups on the glass fiber cloth through hydroxyl groups to form ether bonds. N-(hydroxymethyl) acrylamide can also react with hydroxyl groups on trimethylol phosphorus oxide and hydroxyl groups on the glass fiber cloth through X-ray irradiation to form ether bonds. N-(hydroxymethyl) acrylamide is bonded together by grafting reaction with polyacrylic acid through carbon-carbon double bonds and irradiation with X-rays, eliminating the need for peroxide grafting. Trimethylol phosphorus oxide and N-(hydroxymethyl) acrylamide have flame retardancy and are combined with glass fiber cloth through the action of hydroxyl groups, making the glass fiber cloth flame retardant. At the same time, the flame retardants in the present invention are all organic small molecules, and the phosphorus nitrogen flame retardant is chemically bonded to the glass fiber cloth through chemical bonds at the molecular level, so it is similar to a plasticizer and plays a good plasticizing and toughening role.

[0009] Preferably, in step S1, the molar ratio of trishydroxymethylphosphine oxide to ethylene glycol is 1:(2-20).

[0010] Preferably, in step S1, the first X-ray irradiation conditions are: radiation intensity of 80-120 mSv / h, immersion temperature of 30-80° C., and reaction time of 15-20 minutes.

[0011] Preferably, in step S2, the molar ratio of the polyacrylic acid, N-(hydroxymethyl)acrylamide and water is 1:(2-20):(4-40).

[0012] Preferably, in step S2, the second X-ray irradiation conditions are: radiation intensity of 80-120 mSv / h, immersion temperature of 30-80° C., and reaction time of 15-20 minutes.

[0013] The second aspect of the present invention provides a flame retardant and fire resistant tape material obtained by the above-mentioned preparation method.

[0014] A third aspect of the present invention provides use of the flame retardant and fire resistant tape material in preparing cables.

[0015] Through the above technical solution, the present invention achieves the following beneficial effects: The present invention immerses the glass fiber cloth in a mixed solution of trimethylol phosphorus oxide and ethylene glycol, performs a first X-ray irradiation, and then immerses the prepared glass fiber cloth in a mixed aqueous emulsion of polyacrylic acid and N-(hydroxymethyl) acrylamide, and performs a second X-ray irradiation, the purpose of which is to better connect the flame retardant trimethylol phosphorus oxide and N-(hydroxymethyl) acrylamide, as well as polyacrylic acid, to the glass fiber cloth through X-ray irradiation. Trimethylol phosphorus oxide and N-(hydroxymethyl) acrylamide have flame retardancy, and are combined with the glass fiber cloth through the action of hydroxyl groups, so that the glass fiber cloth has flame retardancy. At the same time, the flame retardants in the present invention are all organic small molecules, and the phosphorus nitrogen flame retardant is chemically bonded to the glass fiber cloth through chemical bonds at the molecular level, so it is similar to a plasticizer and plays a good plasticizing and toughening role. DETAILED DESCRIPTION

[0016] The specific embodiments of the present invention are described in detail below. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0017] In the following examples, the glass fiber cloth model is: 200g / m 2 , weft density 18 strands / 10cm, warp density 18 strands / 10cm, thickness 0.2mm.

[0018] Embodiment 1: First select glass fiber cloth 0.01m 2 , immersed in a mixed solution of 1 mol trihydroxymethylphosphine oxide and 2 mol ethylene glycol, and irradiated with an X-ray machine at a radiation intensity of 80 mSv / h, an immersion temperature of 30°C, and a reaction time of 20 minutes.

[0019] Next, the glass fiber cloth obtained in the previous step was immersed in a mixed emulsion of 1 mol polyacrylic acid, 2 mol N-(hydroxymethyl)acrylamide and 40 mol water, and irradiated with an X-ray machine at a radiation intensity of 80 mSv / h, an immersion temperature of 30°C, and a reaction time of 20 minutes.

[0020] Embodiment 2: First select glass fiber cloth 0.01m 2 , immersed in a mixed solution of 1 mol trihydroxymethylphosphine oxide and 5 mol ethylene glycol, and irradiated with an X-ray machine at a radiation intensity of 110 mSv / h, an immersion temperature of 60°C, and a reaction time of 15 minutes.

[0021] Next, the glass fiber cloth obtained in the previous step was immersed in a mixed emulsion of 1 mol polyacrylic acid, 5 mol N-(hydroxymethyl)acrylamide and 8 mol water, and irradiated with an X-ray machine at a radiation intensity of 100 mSv / h, an immersion temperature of 60°C, and a reaction time of 15 minutes.

[0022] Embodiment 3: First select glass fiber cloth 0.01m 2 , immersed in a mixed solution of 1 mol trihydroxymethylphosphine oxide and 20 mol ethylene glycol, and irradiated with an X-ray machine at a radiation intensity of 120 mSv / h, an immersion temperature of 80°C, and a reaction time of 20 minutes.

[0023] Next, the glass fiber cloth obtained in the previous step was immersed in a mixed emulsion of 1 mol polyacrylic acid, 20 mol N-(hydroxymethyl)acrylamide and 40 mol water, and irradiated with an X-ray machine at a radiation intensity of 120 mSv / h, an immersion temperature of 80°C, and a reaction time of 20 minutes.

[0024] Comparative Example 1: First select glass fiber cloth 0.01m 2 , immersed in a mixed solution of 1 mol trihydroxymethylphosphine oxide and 2 mol ethylene glycol, the immersion temperature was 30°C, and the immersion time was 20 minutes.

[0025] Next, the glass fiber cloth obtained in the previous step was immersed in a mixed emulsion of 1 mol polyacrylic acid, 2 mol N-(hydroxymethyl)acrylamide and 40 mol water at a temperature of 30° C. for 20 minutes.

[0026] Performance Testing Performance test methods: Fiber material tensile test standard ASTM D3039 / D3039M-17a; oxygen index test standard ASTM D2863-77; smoke density rating (SDR) test standard ISO 5659-2.

[0027] The results are shown in Table 1.

[0028] Table 1 Performance test results

[0029] From the above results, it can be seen that Examples 1 to 3 achieve good flame retardancy and flexibility, while the flame retardancy and flexibility of the comparative example using the impregnation method are significantly weaker.

[0030] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0031] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0032] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A method for preparing a flame retardant and fire resistant tape material, characterized in that: The steps include: S1, immersing the glass fiber cloth in a mixed solution of trihydroxymethylphosphine oxide and ethylene glycol, and performing the first X-ray irradiation; S2, immersing the glass fiber cloth obtained in step S1 in a mixed aqueous emulsion of polyacrylic acid and N-(hydroxymethyl)acrylamide, and performing a second X-ray irradiation.

2. The preparation method according to claim 1, characterized in that: In step S1, the molar ratio of trihydroxymethylphosphine oxide to ethylene glycol is 1:(2-20).

3. The preparation method according to claim 1, characterized in that: In step S1, the first X-ray irradiation conditions are: radiation intensity of 80-120 mSv / h, immersion temperature of 30-80°C, and reaction time of 15-20 minutes.

4. The preparation method according to claim 1, characterized in that: In step S2, the molar ratio of the polyacrylic acid, N-(hydroxymethyl)acrylamide and water is 1:(2-20):(4-40).

5. The preparation method according to claim 1, characterized in that: In step S2, the second X-ray irradiation conditions are: radiation intensity of 80-120 mSv / h, immersion temperature of 30-80°C, and reaction time of 15-20 minutes.

6. The flame retardant and fire resistant tape material obtained by the preparation method according to any one of claims 1 to 5.

7. Use of the flame retardant and fire resistant tape material according to claim 6 in the preparation of cables.

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