A fire-retardant tape and a method of making the same

Abstract

The application discloses a kind of fire-retardant tapes, including base tape, fire-retardant layer attached to base tape, the base tape is woven by the first material line with tensile property in longitudinal direction and the second material line with heat resistance in transverse direction.The fire-retardant tape is provided with the first material line with tensile property in longitudinal direction on the base tape, so that the finished fire-retardant tape has certain tensile property and softness in its length direction.When the fire-retardant tape is used to wrap the material, as the fire-retardant tape is wrapped, due to the extension provided by the first material line in the wrapping direction, the bending of the glass fiber line in transverse direction is not involved in the wrapping process, so the fire-retardant tape will not crack and other conditions, and can fit the wrapped cable part.Meanwhile, the second material line with heat resistance is used in transverse direction, i.e., weft, at this time the fire-retardant tape also has the heat resistance provided by the second material line.Thus, the fire-retardant tape with extension, not easy to break in wrapping process, excellent heat resistance is obtained by using different characteristic material lines in longitudinal and transverse directions.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cable materials, more particularly, to a flame-retardant tape and a preparation method thereof. BACKGROUND

[0002] Cables are everywhere in daily life, and cables are usually ropes of several or several groups of twisted wires, each group of wires is insulated from each other, and is often twisted around a center, and the whole outside is covered with a highly insulated cover. In order to prevent fire, flame-retardant tape is usually used, but the flame-retardant tape in the prior art still has many defects. In addition to the flame-retardant performance provided by the flame-retardant layer, the base tape itself also needs to have heat resistance, otherwise the overall effect of the flame-retardant tape will be affected during use, and the flame-retardant tape or other cable components in close contact with the flame-retardant tape is prone to damage. Therefore, the base tape, i.e. the skeleton, of the flame-retardant tape in the prior art is usually made of glass fiber. However, for such flame-retardant tape, the glass fiber is brittle, and the glass fiber flame-retardant tape in the prior art will break after being folded 1-2 times, so that in actual application, it is prone to breakage, cracking, etc. when winding the cable, not only causing waste of materials, but also even after normal winding, the wound flame-retardant tape will still crack, etc. with the increase of use time, resulting in loose wrapping, and wave-shaped protrusions. Not only does the flame-retardant effect of the flame-retardant tape itself decrease, but also it causes gaps between the outer wrapping material and the cable core, which cannot effectively protect the cable. SUMMARY

[0003] The present application aims to overcome at least one of the above-mentioned deficiencies in the prior art, and to provide a flame-retardant tape that guarantees the heat resistance of the material itself, is soft and not prone to breaking and cracking, and has excellent flame-retardant performance in combination with the flame-retardant layer attached to the base tape.

[0004] The technical solution adopted by the present application is a flame-retardant tape, comprising a base tape and a flame-retardant layer attached to the base tape, wherein the base tape is woven from first material lines with tensile properties in the longitudinal direction and second material lines with heat resistance in the transverse direction. Further, the longitudinal direction is the length direction of the flame-retardant tape, and the transverse direction is the width direction of the flame-retardant tape. When the flame-retardant tape is wrapped, the curved part is actually the first material line in the longitudinal direction, and the second material line in the transverse direction will not be bent. Since the second material line has heat resistance, the flame-retardant tape has both flame-retardant properties and folding resistance by virtue of the respective properties and distribution of the first material line and the second material line, effectively solving the problem of bending and breaking of the glass fiber line in the prior art due to wrapping, and avoiding the conditions of wrapping cracking, corner lifting, etc. caused by breaking, so that the wrapping is more compact and conformal, and the original flame-retardant properties are not lost.

[0005] Further, the first material line is a nylon thread. Further, the second material line is a glass fiber thread. The nylon thread has excellent elasticity, facilitating the bending part during wrapping, and providing a certain softness to the flame-retardant tape. The glass fiber thread has excellent flame retardance, ensuring the required function of the base tape of the flame-retardant tape. Further, the weight of the nylon thread is 50 g / m2.

[0006] Further, the diameter of the first material line is 0.06-0.09 mm, and the diameter of the second material line is 0.01-0.09 mm. When the diameter of the first material line is too large, its tensile property is easily limited, and when the diameter is too small, its toughness is reduced. When the diameter of the second material line is too large, the possibility of being bent during wrapping is increased, affecting the wrapping effect, and when the diameter of the second material line is too small, the flame-retardant effect is likely to be reduced. When the diameter of the first material line is 0.06-0.09 mm and the diameter of the second material line is 0.01-0.09 mm, the effect is better, and the advantages of the first material line and the second material line can be simultaneously achieved.

[0007] Further, the transverse length of the flame-retardant tape is the width of the base tape, and the transverse length of the flame-retardant tape is 1-4 cm, and the first material lines and the second material lines are closely arranged. Further, the length of the flame-retardant tape is greater than 7 cm, at least facilitating the wrapping of a single turn of the cable. Further, the length of the flame-retardant tape is 2000 m. When the transverse length of the flame-retardant tape is 1-4 cm, the cable direction is continuously wrapped, avoiding excessive overlapping of the flame-retardant tape during the wrapping process, so that the wrapped cable has a smooth and round appearance.

[0008] Further, the transverse length of the flame-retardant tape is 1-4 cm, the first material lines are arranged at equal intervals, the second material lines are arranged at equal intervals, and in the square area formed by the transverse length of the flame-retardant tape as the side length, the number of the first material lines is 120-600, and the number of the second material lines is 60-900. Further, the close arrangement has technical requirements for the braiding machine. In order to facilitate production and reduce costs, the braiding can be performed by the interval arrangement, and the functions of the nylon thread and the glass fiber thread are also achieved. At the same time, the interval arrangement is also beneficial to the arrangement of the flame-retardant layer on the side of the first material line and the second material line, facilitating the formation of the flame-retardant layer on the side of the first material line and the second material line, and improving the flame-retardant effect.

[0009] Further, the first material line length direction is inclined 1-5° relative to the longitudinal direction. Since the wrapping needs to be wound and extended along the cable length direction, there may be a situation of oblique stretching, that is, when the first wrapping circle transitions to the second wrapping circle, there is stretching of the flame-retardant tape obliquely, at this time, if the first material line length direction is inclined relative to the longitudinal direction, it is still stretched in the length direction of the first material line, which has the same stretching effect. Moreover, relative to the longitudinal direction, the first material line can still retain the stretching properties in the longitudinal direction. That is, during the wrapping process, usually one end of the flame-retardant tape is used to wrap the wrapped material, and for a complete wrapped cable, a spiral wrapping is usually formed, and when the flame-retardant tape is stretched at a certain angle of inclination in the length direction of the flame-retardant tape. Although the first material line length direction is consistent with the flame-retardant tape length direction, it can also be slightly stretched to one side, but it is easy to affect the stability of the flame-retardant tape structure. By setting the first material line to be inclined relative to the flame-retardant tape length direction, it is beneficial to start wrapping on the inclined side, has better ductility, and maintains a certain stability.

[0010] Further, the flame-retardant layer is formed by drying a glue solution composed of the following components:

[0011] Acrylic emulsion 50-80 parts

[0012] Crosslinking agent 5-10 parts

[0013] First flame-retardant material 2.5 parts

[0014] Second flame-retardant material 2.5 parts

[0015] Third flame-retardant material 5 parts

[0016] The first flame-retardant material is bromine, the second flame-retardant material is antimony trioxide, and the third flame-retardant material is aluminum hydroxide, magnesium hydroxide, or zinc oxide.

[0017] Compared with the raw materials used in the prior art to form the flame-retardant layer, the raw materials used in the flame-retardant layer of the present application not only have good flame-retardant effect, but also are low-smoke, halogen-free, environmentally friendly, and friendly to the environment. For example, bromine is a new type of fiber flame-retardant that is non-polluting, when it is used as one of the components of the flame-retardant layer glue solution, no toxic dibenzodioxin and polybrominated dibenzofuran is produced when the polymer is cracked or burned. Through the compounding of the above components, a low-smoke, halogen-free, and good flame-retardant effect flame-retardant layer can be formed, which has very good flame-retardant effect in combination with the heat resistance of the base tape of the flame-retardant tape.

[0018] Further, the glue solution for forming the fire-retardant layer further comprises 1-5 parts of a lipid microbubble component reagent. The lipid microbubble component is obtained by the following preparation method: (1) DPPC, DSPE-PEG5000 and DPPA are weighed according to the mass ratio of 1g:5g:1g, dissolved in 10ml chloroform, sealed and ultrasonically oscillated for 1min to obtain a phospholipid dispersion; (2) the phospholipid dispersion is rotary evaporated under the condition of 60℃, the pressure is 0.1Mpa, the rotation speed is 120r / min, and the time is 45min, and when a uniform milky white film is formed, it is obtained; (3) the hydrated water is eluted with 5ml PBS, and then placed in a sealed bottle; (4) CO2 gas is introduced to replace the air in the bottle, and then oscillated for 1min. And centrifuged twice at 500rpm / min to obtain purified lipid microbubbles loaded with CO2. (5) The lipid microbubbles are diluted in water at a ratio of 10% to obtain the lipid microbubble component reagent.

[0019] The lipid microbubble shell is a phospholipid component. The phospholipid shell material itself can provide certain fire-retardant properties, and when heated and destroyed, it can instantaneously release the gas carbon dioxide wrapped therein, thereby rapidly reducing the oxygen conditions in the combustion environment to achieve fire-retardant effect.

[0020] Further, the fire-retardant layer is distributed with microbubble particles loaded with carbon dioxide. Further, the microbubble particles are lipid microbubble particles.

[0021] Another object of the present application is to provide a preparation method of the fire-retardant tape, comprising the steps of:

[0022] S1, configuring a fire-retardant layer glue solution;

[0023] S2, the base tape formed by weaving the first material line and the second material line passes through the glue solution, and the glue solution is attached to the base tape;

[0024] S3, the base tape with the attached glue solution is dried to obtain the fire-retardant tape.

[0025] Further, the base tape with the attached glue solution in step S2 is dried by three-stage temperature, the first-stage drying temperature is 130-150℃, the drying time is 1-3s, the second-stage drying temperature is 120-130℃, the drying time is 1-3s, and the third-stage drying temperature is 110-120℃, the drying time is 1-3s.

[0026] Further, the acrylic acid polymer emulsion is PRIMAL-B-959Emulsion, and the crosslinking agent is AQUADERMXL50.

[0027] Compared with the prior art, the application has the beneficial effects that: the first material line with stretchability is arranged on the base band of the fire-retardant tape in the longitudinal direction, so that the finished fire-retardant tape has certain stretchability and softness in the length direction, when the fire-retardant tape is used to wrap the material, the fire-retardant tape will not be cracked and the like and can be attached to the wrapped cable part during the wrapping process due to the stretchability provided by the first material line in the wrapping direction and the bending of the glass fiber line in the transverse direction is not involved. Meanwhile, the second material line with heat resistance is used in the transverse direction, that is, the weft, so that the fire-retardant tape has the heat resistance provided by the second material line in addition to the characteristics of the first material line. Thus, the fire-retardant tape with the stretchability, the difficulty of breaking during the wrapping process and excellent heat resistance is obtained by using the material lines with different characteristics in the longitudinal and transverse directions. Meanwhile, the fire-retardant layer in the application is formed by drying the glue solution attached to the base band, and the fire-retardant layer has excellent fire-retardant performance, low smoke, halogen-free and environmental protection. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The figure is a schematic diagram of the base band of the fire-retardant tape.

[0029] Figure 2 The figure is a schematic diagram of the structure of the first material line and the second material line of the fire-retardant tape in embodiment 1.

[0030] Figure 3 The figure is a schematic diagram of the structure of the first material line of the fire-retardant tape in embodiment 1 relative to the longitudinal direction.

[0031] In the figure: 1, first material line; 2, second material line. DETAILED DESCRIPTION

[0032] The drawings of the application are only used for exemplary illustration and cannot be understood as the limitation of the application. In order to better illustrate the following embodiments, some components in the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; it is understandable for those skilled in the art that some known structures and their descriptions in the drawings can be omitted.

[0033] Embodiment 1

[0034] As Figure 1 , 2As shown, the embodiment discloses a fire-retardant tape, comprising a base tape and a fire-retardant layer attached to the base tape, the base tape is woven by first material lines 1 with tensile property in longitudinal direction and second material lines 2 with heat resistance in transverse direction. Further, the longitudinal direction is the length direction of the fire-retardant tape, and the transverse direction is the width direction of the fire-retardant tape. When the fire-retardant tape is wrapped, the curved part is actually the first material line 1 in the longitudinal direction, and the second material line 2 in the transverse direction will not be bent. Since the second material line 2 has heat resistance, the fire-retardant tape has both fire-retardant property and folding resistance property through the respective characteristics and distribution of the first material line 1 and the second material line 2, effectively solving the problem that the glass fiber line is bent to break in the prior art when wrapped, avoiding the conditions such as cracking and corner lifting caused by breaking when wrapped, making the wrapping more compact and conformable, and not losing the original fire-retardant property.

[0035] In the embodiment, the first material line 1 is a nylon thread, and the second material line 2 is a glass fiber line. The nylon thread has excellent elasticity, which is convenient for being the curved part when wrapped and can provide a certain softness for the fire-retardant tape. The glass fiber line has excellent fire-retardant property, which guarantees the required function of the base tape of the fire-retardant tape.

[0036] Specifically, the diameter of the first material line 1 is 0.06-0.09mm, and the diameter of the second material line 2 is 0.01-0.09mm. When the diameter of the first material line 1 is too large, its tensile property is easily limited, and when the diameter is too small, its toughness is reduced. When the diameter of the second material line 2 is too large, the possibility of being bent when wrapped is increased, which affects the wrapping effect, and when the diameter of the second material line 2 is small, the fire-retardant effect is reduced. When the diameter of the first material line 1 is 0.06-0.09mm and the diameter of the second material line 2 is 0.01-0.09mm, the effect is better, and the advantages of the first material line 1 and the second material line 2 can be simultaneously possessed.

[0037] The transverse length of the fire-retardant tape is the width of the base tape, and the transverse length of the fire-retardant tape is 1-4cm, and the first material lines 1 and the second material lines 2 are arranged closely. Further, the length of the fire-retardant tape is greater than 7cm, which is at least convenient for wrapping a single-turn cable. When the transverse length of the fire-retardant tape is 1-4cm, it is convenient to continuously wrap along the cable direction, avoids too much overlapping of the fire-retardant tape during the wrapping process, and makes the wrapped cable smooth in appearance, good-looking and beautiful.

[0038] Or, the fire-retardant tape has a transverse length of 1-4 cm, the first material lines 1 are arranged at equal intervals, the second material lines 2 are arranged at equal intervals, and in a square area formed by taking the transverse length of the fire-retardant tape as a side length, the number of the first material lines 1 is 120-600, and the number of the second material lines 2 is 60-900. Further, the close arrangement has technical requirements for braiding machines, in order to facilitate production and reduce costs, the braiding can be performed in a spaced arrangement, and the same functions of the nylon wire and the glass fiber wire are also achieved.

[0039] In addition to adopting the same direction as the longitudinal direction, the first material line can also be inclined relative to the longitudinal direction. For example, the length direction of the first material line 1 is inclined by 1-5° relative to the longitudinal direction, as shown in FIG. 1B. Figure 3 Since the wrapping needs to be wound and extended along the length direction of the cable, there can be an oblique stretching condition, that is, when the first wrapping circle transitions to the second wrapping circle, the fire-retardant tape is stretched obliquely, at this time, if the length direction of the first material line 1 is inclined relative to the longitudinal direction, the stretching in the length direction of the first material line 1 is still embodied, which has the same stretching effect. Moreover, relative to the longitudinal direction, the first material line 1 can still retain the stretching property in the longitudinal direction. That is, during the wrapping process, usually one end of the fire-retardant tape is used to start winding the wrapped material, in order to form a complete wrapped cable, usually a spiral winding is formed, and when the spiral winding fire-retardant tape is stretched at a certain inclination angle in the length direction of the fire-retardant tape. Although when the length direction of the first material line 1 is consistent with the length direction of the fire-retardant tape, it can also be slightly stretched to one side, but it is easy to affect the stability of the structure of the fire-retardant tape. By setting the first material line 1 to be inclined relative to the length direction of the fire-retardant tape, it is beneficial to start wrapping along the inclined side, has better ductility, and maintains a certain stability.

[0040] Specifically, the fire-retardant layer is formed by drying a glue solution composed of the following components:

[0041] Acrylic emulsion 50-80 parts

[0042] Crosslinking agent 5-10 parts

[0043] First fire-retardant material 2.5 parts

[0044] Second fire-retardant material 2.5 parts

[0045] Third fire-retardant material 5 parts

[0046] The first fire-retardant material is bromine, the second fire-retardant material is diantimony trioxide, and the third fire-retardant material is aluminum hydroxide, magnesium hydroxide, or zinc oxide.

[0047] Compared with raw materials used in the prior art for forming the flame-retardant layer, the raw materials used in the flame-retardant layer have good flame-retardant effect, are low-smoke, halogen-free, environmentally friendly, and friendly to the environment. For example, bromine is a new type of non-polluting fiber flame retardant. When it is used as one of the components of the glue solution of the flame-retardant layer, no toxic polybrominated dibenzodioxin (PBDD) and polybrominated dibenzofuran (PBDF) is generated when the high polymer is cracked or burned. Through compounding of the above components, a low-smoke, halogen-free, and good flame-retardant layer can be formed, which has very good flame-retardant effect in combination with the heat resistance of the base tape of the flame-retardant tape.

[0048] Specifically, the glue solution for forming the flame-retardant layer further comprises 1-5 parts of a lipid microbubble component reagent. The lipid microbubble component is obtained by the following preparation method: (1) DPPC, DSPE-PEG5000, and DPPA are weighed according to the mass ratio of 1g:5g:1g, dissolved in 10ml of chloroform, sealed, and ultrasonically oscillated for 1min to obtain a phospholipid dispersion; (2) the phospholipid dispersion is rotary evaporated under the condition of 60℃, the pressure is 0.1Mpa, the rotation speed is 120r / min, and the time is 45min. When a uniform milky white film is formed, it is obtained; (3) the hydrated water is eluted with 5ml of PBS, and then placed in a sealed bottle; (4) CO2 gas is introduced to replace the air in the bottle, and then oscillated for 1min. And centrifuged twice at 500rpm / min to obtain purified lipid microbubbles loaded with CO2. (5) The lipid microbubble component reagent is diluted in water at a ratio of 10%, which is the lipid microbubble component reagent. The lipid microbubble component reagent is mixed with other components of the above glue solution, and coated on the base tape of the flame-retardant tape and dried to form the flame-retardant layer on the flame-retardant tape.

[0049] The lipid microbubble shell is a phospholipid component. The phospholipid shell material itself can provide certain flame retardancy, and when it is damaged by heat, it can instantaneously release the gas carbon dioxide wrapped therein, thereby rapidly reducing the oxygen condition in the combustion environment to achieve the flame-retardant effect.

[0050] Example 2

[0051] The embodiment discloses a preparation method of the flame-retardant tape in the above embodiment 1, comprising the following steps:

[0052] S1, configuring the flame-retardant layer glue solution in embodiment 1;

[0053] S2, the base tape formed by weaving the first material line 1 and the second material line 2 passes through the glue solution, and the glue solution is attached to the base tape;

[0054] S3, the base tape with the attached glue solution is dried to obtain the flame-retardant tape.

[0055] The base band with the glue liquid attached in step S2 is dried by three-stage temperature, the first-stage drying temperature is 130-150 DEG C, the drying time is 1-3s, the second-stage drying temperature is 120-130 DEG C, the drying time is 1-3s, the third-stage drying temperature is 110-120 DEG C, and the drying time is 1-3s.

[0056] PRIMAL-B-959 Emulsion, and the cross-linking agent is AQUADERM XL50.

[0057] Obviously, the above-mentioned embodiments of the present application are only examples for clearly illustrating the technical solutions of the present application, and are not intended to limit the specific embodiments of the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A flame-retardant tape, comprising a base tape and a flame-retardant layer attached to the base tape, characterized in that, The base strip is woven from a first material thread with longitudinal tensile strength and a second material thread with transverse heat resistance. The first material thread is nylon thread and the second material thread is glass fiber thread. The longitudinal direction is the length direction of the flame-retardant strip and the transverse direction is the width direction of the flame-retardant strip. The flame-retardant layer is formed by drying an adhesive solution composed of the following components: 50-80 parts of acrylic emulsion 5-10 parts of crosslinking agent First, 2.5 parts of fuel. The second flame arrestor is 2.5 parts. The third type of fuel consists of 5 parts. The first flame retardant is bromine, the second flame retardant is antimony trioxide, and the third flame retardant is aluminum hydroxide, magnesium hydroxide, or zinc oxide. The adhesive that forms the flame-retardant layer also includes 1 to 5 parts of a lipid microbubble component reagent; The lipid microbubble component was obtained by the following preparation method: (1) DPPC, DSPE-PEG5000 and DPPA were weighed at a mass ratio of 1g:5g:1g, dissolved in 10ml of chloroform, sealed and ultrasonically vibrated for 1min to obtain a phospholipid dispersion; (2) The phospholipid dispersion was evaporated under reduced pressure at 60℃, with a pressure of 0.1Mpa, a rotation speed of 120r / min and a time of 45min, until a uniform milky white film was formed; (3) It was washed with 5ml of PBS to remove water, and then placed in a sealed bottle; (4) CO2 gas was introduced to replace the air in the bottle, then the mixture was vibrated for 1min and centrifuged twice at 500rpm / min to obtain purified lipid microbubbles loaded with CO2; (5) The lipid microbubbles were diluted in water at a ratio of 10% to obtain the lipid microbubble component reagent.

2. The flame-retardant strip according to claim 1, characterized in that, The diameter of the first material wire is 0.06–0.09 mm, and the diameter of the second material wire is 0.01–0.09 mm.

3. The flame-retardant strip according to claim 2, characterized in that, The lateral length of the flame-retardant strip is the width of the base strip, and the lateral length of the flame-retardant strip is 1 to 4 cm. The first material lines and the second material lines are closely arranged.

4. The flame-retardant strip according to claim 2, characterized in that, The flame-retardant strip has a transverse length of 1 to 4 cm. The first material lines are arranged at equal intervals, and the second material lines are arranged at equal intervals. Within a square area formed by the transverse length of the flame-retardant strip, the number of first material lines is 120 to 600 and the number of second material lines is 60 to 900.

5. The flame-retardant strip according to claim 1, characterized in that, The length direction of the first material line is inclined at 1 to 5° relative to the longitudinal direction.

6. The method for preparing the flame-retardant tape according to any one of claims 1 to 5, characterized in that, Including the following steps: S1. Prepare the flame-retardant adhesive solution; S2. The base tape formed by the first material wire and the second material wire is passed through the adhesive liquid, and the adhesive liquid adheres to the base tape. S3. Dry the base tape with the adhesive residue to obtain a flame-retardant tape.

7. The preparation method according to claim 6, characterized in that, In step S2, the base tape with adhesive is dried in three stages of temperature control: the first stage drying temperature is 130-150℃ and the drying time is 1-3s; the second stage drying temperature is 120-130℃ and the drying time is 1-3s; and the third stage drying temperature is 110-120℃ and the drying time is 1-3s.

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