CN114806450A - Uniform heat dissipation fireproof film for mobile phone battery and preparation method thereof - Google Patents

Uniform heat dissipation fireproof film for mobile phone battery and preparation method thereof Download PDF

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CN114806450A
CN114806450A CN202210239424.8A CN202210239424A CN114806450A CN 114806450 A CN114806450 A CN 114806450A CN 202210239424 A CN202210239424 A CN 202210239424A CN 114806450 A CN114806450 A CN 114806450A
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heat
layer
parts
fireproof
conducting
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CN114806450B (en
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朱向忠
刘展宏
梁先文
涂悦
封力行
赖志强
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Shenzhen Faxin Zhongxin New Material Co ltd
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Shenzhen Faxin Zhongxin New Material Co ltd
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Abstract

The invention discloses a uniform-heat-dissipation fireproof film for a mobile phone battery and a preparation method thereof, wherein the film comprises a fireproof layer, a uniform-heat layer and a heat conducting layer; the heat equalizing layer comprises the following raw materials in parts by weight: the composition comprises the following raw materials in parts by weight: 40-50 parts of nano silver wire slurry, 10-20 parts of water, 1-2 parts of graphene and 1-2 parts of waterborne polyurethane resin; the fireproof layer comprises the following raw materials in parts by weight: 30-50 parts of main resin A, 100-150 parts of solvent, 5-10 parts of heat-conducting filler, 5-10 parts of curing agent A and 20-30 parts of flame retardant; the heat conducting layer comprises the following raw materials in parts by weight: main resin B20-30 parts, heat-conducting filler 15-20 parts, solvent 100-150 parts, and curing agent B2-5 parts; the film prepared by the invention has high heat conductivity coefficient and better fireproof effect.

Description

Uniform heat dissipation fireproof film for mobile phone battery and preparation method thereof
Technical Field
The invention relates to the technical field of films, in particular to a uniform-heat-dissipation fireproof film for a mobile phone battery and a preparation method thereof.
Background
With the increasing functions of various consumer electronics products in the market, the size of the product is thinner, smaller and lighter. Functional materials such as fireproof, heat-conducting, heat-insulating, soaking, heat-dissipating and the like are increasingly used at the heating part of the mobile phone battery.
This kind of functional material generally adopts the heat conduction material that has superstrong heat conductivity as the substrate for absorb rapidly and the conduction heat when laminating the heat source, make heating element keep within safe operating temperature, and remedy the not enough that traditional product heat conductivity is good and soaking nature is poor through the equal thermal property excellent material of coating, simultaneously, utilize thermal insulation material cladding heat source, make heat-conduction go on along specific direction, thereby realized directional heat dissipation. Under the conventional condition, the heat conduction, heat dissipation and heat equalization material has higher requirements on heat conduction and heat dissipation performance, so that the heat equalization performance of the material is reduced easily due to the reason that the longitudinal heat conduction of the heat conduction component is superior and the transverse heat equalization performance is poorer while the superior heat dissipation is ensured, most functional materials do not have the fireproof function, and the material is easy to ignite when the battery is overloaded.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a uniform-heat-dissipation fireproof film for a mobile phone battery and a preparation method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a mobile phone battery soaking heat dissipation fireproof film comprises a fireproof layer, a heat-equalizing layer and a heat-conducting layer;
the heat equalizing layer comprises the following raw materials in parts by weight:
the composition comprises the following raw materials in parts by weight: 40-50 parts of nano silver wire slurry, 10-20 parts of water, 1-2 parts of graphene and 1-2 parts of waterborne polyurethane resin;
the fireproof layer comprises the following raw materials in parts by weight:
30-50 parts of main resin A, 100-150 parts of solvent, 5-10 parts of heat-conducting filler, 5-10 parts of curing agent A and 20-30 parts of flame retardant;
the heat conducting layer comprises the following raw materials in parts by weight:
main resin B20-30 parts, heat-conducting filler 15-20 parts, solvent 100-150 parts, and curing agent B2-5 parts;
further, the main body resin A is any one or more of polyester resin, polyurethane resin and polyamide resin;
further, the curing agent A is any one or more of a polyether amine ester curing agent, a polyurethane curing agent and an aliphatic polyisocyanate curing agent;
further, the curing agent B is an isocyanate curing agent;
further, the flame retardant is any one of 593 solid resistance or 593 liquid resistance;
further, the main body resin B is any one or more of acrylic resin pressure-sensitive adhesive, epoxy resin pressure-sensitive adhesive and silica gel pressure-sensitive adhesive. The heat conducting layer is prepared by the viscous main body resin B, has certain adhesive property and can be in viscous contact with a heat source to conduct heat.
Further, the heat conducting material is any one or more of boron nitride, aluminum oxide, silicon carbide, aluminum nitride, magnesium oxide, zinc oxide, carbon nanotubes, graphene and nano diamond;
further, the solvent is any one or more of ethyl acetate, butanone, toluene, cyclohexanone and butyl ester;
further, the substrate is a transparent PET film (polyethylene terephthalate film).
Specifically, the invention also provides a preparation method of the soaking heat-dissipation fireproof film for the mobile phone battery, which comprises the following steps:
s1. preparation of fireproof layer
Mixing and dissolving the main resin A and a solvent, adding a flame retardant and a heat-conducting filler, carrying out ultrasonic stirring, and adding the solvent to adjust the viscosity; adding a curing agent, and stirring to obtain a fireproof liquid; uniformly coating the base material in a transfer printing mode, and drying to obtain a fireproof coating material for later use;
s2. preparation of uniform heat layer
Dissolving the waterborne polyurethane resin in water, adding graphene, performing ultrasonic dispersion, and adjusting the viscosity by water; adding the nano silver wire slurry and uniformly stirring at a low speed; and after filtering, uniformly coating the mixture on a fireproof layer of a fireproof coating material by scraping to obtain the fireproof heat conduction material with uniform heat distribution and heat dissipation.
S3, preparing heat conducting layer
Mixing and dissolving the main body resin B and the solvent, adding the heat-conducting filler and the curing agent B in the stirring process, uniformly stirring, and filtering;
s4, preparation of uniform-heat-dissipation fireproof film
And (3) transferring the obtained release film to a uniform heat dissipation fireproof material to obtain a uniform heat dissipation fireproof film.
The invention has the beneficial effects that:
the film prepared by the invention has higher thermal conductivity which reaches 0.35-0.56 w/mk; the heat-generating temperature of the resistance can be effectively reduced, when the heat-conducting layer is applied to a mobile phone battery, the temperature of the mobile phone battery can be reduced by 0.9-2.3 ℃, meanwhile, the fire-proof grade reaches the B1 grade, the material belongs to a flame-retardant material, has a good flame-retardant effect, is difficult to ignite when meeting open fire or under the action of high temperature in the air, is not easy to spread, and stops burning immediately after a fire source is removed. When the film is provided with two heat conduction layers, the heat conductivity and the heat conduction effect are improved, and the fireproof grade of the film is not influenced.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of a thin film according to examples 1 to 4 of the present invention;
FIG. 2 is a schematic structural view of a thin film according to examples 5 to 7 of the present invention;
wherein: 1. a substrate; 2. a fire barrier layer; 3. a heat conductive layer; 4; and (6) homogenizing the heat layer.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
A cell phone battery soaking heat dissipation fireproof film comprises a fireproof layer 2, a soaking layer 4 and a heat conduction layer 3; the heat insulation film comprises a fire-proof layer 2 adhered to a substrate 1 (a transparent PET film), a heat-equalizing layer 4 adhered to the fire-proof layer 2, and a heat-conducting layer 3 adhered to the heat-equalizing layer 4, wherein the heat-conducting layer 3 is adhered to a release paper film.
The parts by weight of the fire-retardant layer, the soaking layer and the heat-conducting layer in the examples 1 to 4 are shown in the following table:
Figure BDA0003543737180000041
Figure BDA0003543737180000051
example 1
A preparation method of a heat-soaking heat-dissipation fireproof film for a mobile phone battery comprises the following steps:
s1, preparing materials according to the specific parts of raw materials;
s2. preparation of fireproof layer
Mixing and dissolving the main resin A and a solvent, adding a flame retardant and a heat-conducting filler, and carrying out ultrasonic stirring with the ultrasonic power of 300W and the stirring speed of 200r/min for 30 min; adding solvent to regulate viscosity (fluid state: fluidity, consistency index is less than or equal to 0); adding a curing agent, and stirring at the stirring speed of 200r/min for 20min to obtain a fireproof liquid; uniformly coating the base material in a transfer printing mode, and drying at 60 ℃ to obtain a fireproof coating for later use;
s3, preparation of heat-conducting glue solution
Mixing and dissolving the main resin B and the solvent, and adding the heat-conducting filler in the stirring process, wherein the stirring speed is 200r/min, and the stirring time is 30 min; adding the curing agent B, stirring uniformly, and filtering by using a 300-mesh screen to obtain a heat-conducting glue solution for later use;
s4, preparing the uniform heat layer
Dissolving the waterborne polyurethane resin in water, adding graphene, and performing ultrasonic dispersion with the ultrasonic power of 300W and the stirring speed of 200r/min for 30 min; adjusting viscosity (fluid state: fluidity, consistency index is less than or equal to 0) with water; adding the nano silver wire slurry into the solution to be stirred at the stirring speed of 20 r/min; filtering with 300 mesh screen, and uniformly scraping the filtrate on the fireproof layer to obtain a material with soaking layer;
s5, preparing uniform heat dissipation fireproof film
And (4) coating the heat-conducting glue solution obtained in the step (S3) on a substrate by scraping, drying at 60 ℃, and then transferring the heat-conducting layer to the uniform heat layer of the uniform heat-dissipating layer material to obtain the uniform heat-dissipating fireproof film.
Example 2
A preparation method of a heat-soaking heat-dissipation fireproof film for a mobile phone battery comprises the following steps:
s1, preparing materials according to the specific parts of raw materials;
s2. preparation of fireproof layer
Mixing and dissolving the main resin A and a solvent, adding a flame retardant and a heat-conducting filler, and carrying out ultrasonic stirring with the ultrasonic power of 500W and the stirring speed of 400r/min for 50 min; adding solvent to regulate viscosity (fluid state: fluidity, consistency index is less than or equal to 0); adding a curing agent, and stirring at the stirring speed of 400r/min for 30min to obtain a fireproof liquid; uniformly coating the base material in a transfer printing mode, and drying at 80 ℃ to obtain a fireproof coating for later use;
s3, preparation of heat-conducting glue solution
Mixing and dissolving the main resin B and the solvent, and adding the heat-conducting filler in the stirring process, wherein the stirring speed is 400r/min, and the stirring time is 50 min; adding the curing agent B, stirring uniformly, and filtering by using a 500-mesh screen to obtain a heat-conducting glue solution for later use;
s4, preparing the uniform heat layer
Dissolving the waterborne polyurethane resin in water, adding graphene, and performing ultrasonic dispersion with the ultrasonic power of 500W and the stirring speed of 400r/min for 50 min; adjusting viscosity (fluid state: fluidity, consistency index is less than or equal to 0) with water; adding the nano silver wire slurry into the solution to be stirred at the stirring speed of 40 r/min; filtering with 500 mesh screen, and uniformly scraping the filtrate on the fireproof layer to obtain a material with soaking layer;
s5, preparing uniform heat dissipation fireproof film
And (4) coating the heat-conducting glue solution obtained in the step (S3) on a substrate by scraping, drying at 80 ℃, and then transferring the heat-conducting layer to the uniform heat layer of the uniform heat-dissipating layer material to obtain the uniform heat-dissipating fireproof film.
Example 3
A preparation method of a heat-soaking heat-dissipation fireproof film for a mobile phone battery comprises the following steps:
s1, preparing materials according to the specific parts of raw materials;
s2. preparation of fireproof layer
Mixing and dissolving the main resin A and a solvent, adding a flame retardant and a heat-conducting filler, and carrying out ultrasonic stirring with the ultrasonic power of 400W and the stirring speed of 300r/min for 40 min; adding solvent to regulate viscosity (fluid state: fluidity, consistency index is less than or equal to 0); adding a curing agent, and stirring at the stirring speed of 300r/min for 25min to obtain a fireproof liquid; uniformly coating the base material in a transfer printing mode, and drying at 70 ℃ to obtain a fireproof coating for later use;
s3, preparation of heat-conducting glue solution
Mixing and dissolving the main resin B and the solvent, and adding the heat-conducting filler in the stirring process, wherein the stirring speed is 300r/min, and the stirring time is 40 min; adding the curing agent B, stirring uniformly, and filtering by using a 400-mesh screen to obtain a heat-conducting glue solution for later use;
s4, preparing the uniform heat layer
Dissolving the waterborne polyurethane resin in water, adding graphene, and performing ultrasonic dispersion with the ultrasonic power of 400W and the stirring speed of 300r/min for 40 min; adjusting viscosity (fluid state: fluidity, consistency index is less than or equal to 0) with water; adding the nano silver wire slurry into the solution to be stirred at the stirring speed of 30 r/min; filtering with 400 mesh screen, and uniformly scraping the filtrate on the fireproof layer to obtain a material with soaking layer;
s5, preparing uniform heat dissipation fireproof film
And (4) coating the heat-conducting glue solution obtained in the step (S3) on a substrate by scraping, drying at 70 ℃, and then transferring the heat-conducting layer to the uniform heat layer of the uniform heat-dissipating layer material to obtain the uniform heat-dissipating fireproof film.
Example 4
A preparation method of a heat-soaking heat-dissipation fireproof film for a mobile phone battery comprises the following steps:
s1, preparing materials according to the specific parts of raw materials;
s2. preparation of fireproof layer
Mixing and dissolving the main resin A and a solvent, adding a flame retardant and a heat-conducting filler, and carrying out ultrasonic stirring with the ultrasonic power of 300W and the stirring speed of 400r/min for 50 min; adding solvent to regulate viscosity (fluid state: fluidity, consistency index is less than or equal to 0); adding a curing agent, and stirring at the stirring speed of 400r/min for 20min to obtain a fireproof liquid; uniformly coating the base material in a transfer printing mode, and drying at 65 ℃ to obtain a fireproof coating for later use;
s3, preparation of heat-conducting glue solution
Mixing and dissolving the main resin B and the solvent, and adding the heat-conducting filler in the stirring process, wherein the stirring speed is 400r/min, and the stirring time is 30 min; adding the curing agent B, stirring uniformly, and filtering by using a 350-mesh screen to obtain a heat-conducting glue solution for later use;
s4, preparing the uniform heat layer
Dissolving the waterborne polyurethane resin in water, adding graphene, and performing ultrasonic dispersion with the ultrasonic power of 300W and the stirring speed of 400r/min for 30 min; adjusting viscosity (fluid state: fluidity, consistency index is less than or equal to 0) with water; adding the nano silver wire slurry into the solution to be stirred at the stirring speed of 40 r/min; filtering with 300 mesh screen, and uniformly scraping the filtrate on the fireproof layer to obtain a material with soaking layer;
s5, preparing uniform heat dissipation fireproof film
And (4) coating the heat-conducting glue solution obtained in the step (S3) on a substrate by scraping, drying at 75 ℃, and then transferring the heat-conducting layer to the heat-equalizing layer of the heat-equalizing layer material to obtain the heat-equalizing heat-dissipating fireproof film.
Example 5
A cell phone battery soaking heat dissipation fireproof film comprises a fireproof layer 2, a soaking layer 4 and a heat conduction layer 3; the heat insulation material comprises a fireproof layer 2 adhered to a substrate 1, a heat equalizing layer 4 adhered to the fireproof layer 2, and a first heat conduction layer 3 adhered to the heat equalizing layer 4, wherein the first heat conduction layer 3 is adhered to a release paper film; and a second heat conduction layer 3 is arranged between the fireproof layer 2 and the soaking layer 4, namely the heat conduction layer 3 is doubled.
In this embodiment, the cell phone battery soaking heat dissipation fireproof film comprises 2 heat conduction layers; wherein the weight parts of the raw materials of the single fire-proof layer, the single heat-equalizing layer and the single heat-conducting layer are consistent with that of the raw materials of the embodiment 1;
a method for preparing a heat-equalizing heat-dissipating fireproof film for a mobile phone battery comprises the following steps
S1, preparing materials according to the specific parts of raw materials;
s2. preparation of fireproof layer
Mixing and dissolving the main resin A and a solvent, adding a flame retardant and a heat-conducting filler, and carrying out ultrasonic stirring with the ultrasonic power of 300W and the stirring speed of 200r/min for 30 min; adding solvent to regulate viscosity (fluid state: fluidity, consistency index is less than or equal to 0); adding a curing agent, and stirring at the stirring speed of 200r/min for 20min to obtain a fireproof liquid; uniformly coating the base material in a transfer printing mode, and drying at 60 ℃ to obtain a fireproof coating for later use;
s3, preparation of heat-conducting glue solution
Mixing and dissolving the main resin B and the solvent, and adding the heat-conducting filler in the stirring process, wherein the stirring speed is 200r/min, and the stirring time is 30 min; adding the curing agent B, stirring uniformly, and filtering by using a 300-mesh screen to obtain a heat-conducting glue solution for later use;
s4. preparation of first heat conduction layer
Coating the heat-conducting glue solution on the base material by blade coating the fireproof coating obtained in the step S2, and drying at 80 ℃ to obtain a first heat-conducting layer;
s5, preparing the uniform heat layer
Dissolving the waterborne polyurethane resin in water, adding graphene, and performing ultrasonic dispersion with the ultrasonic power of 300W and the stirring speed of 200r/min for 30 min; adjusting viscosity (fluid state: fluidity, consistency index is less than or equal to 0) with water; adding the nano silver wire slurry into the solution to be stirred at the stirring speed of 20 r/min; filtering with a 300-mesh screen, and uniformly scraping and coating the filtrate on the first heat conduction layer to obtain a material with a soaking layer;
s6, preparation of uniform-heat-dissipation fireproof film
Preparing a second part of heat-conducting glue solution according to the raw material composition of the heat-conducting glue solution of the step S3; and (4) coating the second hot glue solution on the substrate by scraping, drying at 60 ℃, and then transferring the first heat conduction layer to the heat equalizing layer of the heat equalizing layer material in the step S5 to obtain the heat equalizing and dissipating fireproof film.
Example 6
A mobile phone battery soaking heat dissipation fireproof film comprises a fireproof layer, a heat-equalizing layer and a heat-conducting layer; the heat insulation material comprises a fireproof layer adhered to a base material, a heat equalizing layer adhered to the fireproof layer, and a first heat conduction layer adhered to the heat equalizing layer, wherein the first heat conduction layer is adhered to a release paper film; and a second heat conduction layer is arranged between the fireproof layer and the soaking layer, namely the heat conduction layer is doubled.
In this embodiment, the cell phone battery soaking heat dissipation fireproof film comprises 2 heat conduction layers; wherein the weight parts of the raw materials of the single fire-proof layer, the single heat-equalizing layer and the single heat-conducting layer are consistent with those of the embodiment 2;
a method for preparing a heat-equalizing heat-dissipating fireproof film for a mobile phone battery comprises the following steps
S1, preparing materials according to the specific parts of raw materials;
s2. preparation of fireproof layer
Mixing and dissolving the main resin A and a solvent, adding a flame retardant and a heat-conducting filler, and carrying out ultrasonic stirring with the ultrasonic power of 500W and the stirring speed of 400r/min for 50 min; adding solvent to regulate viscosity (fluid state: fluidity, consistency index is less than or equal to 0); adding a curing agent, and stirring at the stirring speed of 400r/min for 30min to obtain a fireproof liquid; uniformly coating the base material in a transfer printing mode, and drying at 80 ℃ to obtain a fireproof coating for later use;
s3, preparation of heat-conducting glue solution
Mixing and dissolving the main resin B and the solvent, and adding the heat-conducting filler in the stirring process, wherein the stirring speed is 400r/min, and the stirring time is 50 min; adding the curing agent B, stirring uniformly, and filtering by using a 500-mesh screen to obtain a heat-conducting glue solution for later use;
s4. preparation of first heat conduction layer
Coating the heat-conducting glue solution prepared in the step S3 on the fireproof coating of the step S2 on a substrate in a blade mode, and drying at the temperature of 80 ℃ to obtain a first heat-conducting layer;
s5, preparing the uniform heat layer
Dissolving the waterborne polyurethane resin in water, adding graphene, and performing ultrasonic dispersion with the ultrasonic power of 500W and the stirring speed of 400r/min for 50 min; adjusting viscosity (fluid state: fluidity, consistency index is less than or equal to 0) with water; adding the nano silver wire slurry into the solution to be stirred at the stirring speed of 40 r/min; filtering with 500 mesh screen, and uniformly scraping the filtrate on the first heat conduction layer to obtain a material with soaking layer;
s6, preparation of uniform-heat-dissipation fireproof film
Preparing a second part of heat-conducting glue solution according to the raw material composition of the heat-conducting glue solution of the step S3; and (3) coating the second hot glue solution on the substrate by scraping, drying at 80 ℃, and then transferring the second heat conduction layer to the heat equalizing layer of the heat equalizing layer material to obtain the heat equalizing heat dissipation fireproof film.
Example 7
A mobile phone battery soaking heat dissipation fireproof film comprises a fireproof layer, a heat-equalizing layer and a heat-conducting layer; the heat insulation material comprises a fireproof layer adhered to a base material, a heat equalizing layer adhered to the fireproof layer, and a first heat conduction layer adhered to the heat equalizing layer, wherein the first heat conduction layer is adhered to a release paper film; and a second heat conduction layer is arranged between the fireproof layer and the soaking layer, namely the heat conduction layer is doubled.
In this embodiment, the cell phone battery soaking heat dissipation fireproof film comprises 2 heat conduction layers; wherein the weight parts of the raw materials of the single fire-proof layer, the single heat-equalizing layer and the single heat-conducting layer are consistent with that of the embodiment 3;
a preparation method of a heat-soaking heat-dissipation fireproof film for a mobile phone battery comprises the following steps:
s1, preparing materials according to the specific parts of raw materials;
s2. preparation of fireproof layer
Mixing and dissolving the main resin A and a solvent, adding a flame retardant and a heat-conducting filler, and carrying out ultrasonic stirring with the ultrasonic power of 400W and the stirring speed of 300r/min for 40 min; adding solvent to regulate viscosity (fluid state: fluidity, consistency index is less than or equal to 0); adding a curing agent, and stirring at the stirring speed of 300r/min for 25min to obtain a fireproof liquid; uniformly coating the base material in a transfer printing mode, and drying at 70 ℃ to obtain a fireproof coating for later use;
s3, preparation of heat-conducting glue solution
Mixing and dissolving the main resin B and the solvent, and adding the heat-conducting filler in the stirring process, wherein the stirring speed is 300r/min, and the stirring time is 40 min; adding the curing agent B, stirring uniformly, and filtering by using a 400-mesh screen to obtain a heat-conducting glue solution for later use;
s4. preparation of first heat conduction layer
Coating the heat-conducting glue solution prepared in the step S3 on the base material through blade coating of the fireproof coating in the step S2, and drying at 80 ℃ to obtain a first heat-conducting layer;
s5, preparing the uniform heat layer
Dissolving the waterborne polyurethane resin in water, adding graphene, and performing ultrasonic dispersion with the ultrasonic power of 400W and the stirring speed of 300r/min for 40 min; adjusting viscosity (fluid state: fluidity, consistency index is less than or equal to 0) with water; adding the nano silver wire slurry into the solution to be stirred at the stirring speed of 30 r/min; filtering with a 400-mesh screen, and uniformly scraping and coating the filtrate on the first heat conduction layer to obtain a material with a soaking layer;
s6, preparation of uniform-heat-dissipation fireproof film
Preparing a second part of heat-conducting glue solution according to the raw material composition of the heat-conducting glue solution in the step S3; and (3) coating the second hot glue solution on the substrate by scraping, drying at 70 ℃, and then transferring and pasting the second heat conduction layer on the heat equalizing layer of the heat equalizing layer material to obtain the heat equalizing heat dissipation fireproof film.
The films obtained in examples 1 to 7 were tested for their properties and the results are summarized in Table 1 below
TABLE 1
Figure BDA0003543737180000131
From the above table 1, it can be seen that the film prepared by the invention has higher thermal conductivity, and the thermal conductivity reaches 0.35-0.56 w/mk; the flame-retardant heat-insulating material can effectively reduce the heating temperature of the resistance, when the flame-retardant heat-insulating material is applied to a mobile phone battery, the temperature of the mobile phone battery can be reduced by 0.9-2.3 ℃, meanwhile, the fire-retardant grade reaches the grade B1, the flame-retardant heat-insulating material belongs to a flame-retardant material, is difficult to ignite in the air or under the action of high temperature, is not easy to spread quickly, and stops burning immediately after a fire source is removed.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.

Claims (9)

1. A mobile phone battery soaking heat dissipation fireproof film is characterized by comprising a fireproof layer, a heat equalizing layer and a heat conducting layer;
the heat equalizing layer comprises the following raw materials in parts by weight:
40-50 parts of nano silver wire slurry, 10-20 parts of water, 1-2 parts of graphene and 1-2 parts of waterborne polyurethane resin;
the fireproof layer comprises the following raw materials in parts by weight:
the main resin A30-50 parts, the solvent 100-150 parts, the heat-conducting filler 5-10 parts, the curing agent A5-10 parts and the flame retardant 20-30 parts;
the heat conducting layer comprises the following raw materials in parts by weight:
20-30 parts of main resin B, 15-20 parts of heat-conducting filler, 100-150 parts of solvent and 2-5 parts of curing agent B.
2. The soaking heat-dissipation fireproof film for the cell phone battery as claimed in claim 1, wherein the film comprises a fire-retardant layer adhered to a substrate, a uniform heat layer adhered to the fire-retardant layer, and a heat-conducting layer adhered to the uniform heat layer.
3. The soaking heat-dissipation fireproof film for the mobile phone battery as claimed in claim 1, wherein a heat-conducting layer is further arranged between the fireproof layer and the soaking layer.
4. The soaking heat-dissipation fireproof film for the mobile phone battery as claimed in claim 1, wherein the main body resin A is any one or more of polyester resin, polyurethane resin and polyamide resin.
5. The soaking heat-dissipation fireproof film for the mobile phone battery as claimed in claim 1, wherein the main body resin B is any one or more of acrylic resin pressure-sensitive adhesive, epoxy resin pressure-sensitive adhesive and silica gel pressure-sensitive adhesive.
6. The soaking heat-dissipation fireproof film for the mobile phone battery as claimed in claim 1, wherein the heat-conducting material is any one or more of boron nitride, aluminum oxide, silicon carbide, aluminum nitride, magnesium oxide, zinc oxide, carbon nanotubes, graphene and nanodiamond.
7. The soaking heat-dissipation fireproof film for the mobile phone battery as claimed in claim 1, wherein the solvent is any one or more of ethyl acetate, butanone, toluene, cyclohexanone and butyl ester.
8. The soaking heat-dissipation fireproof film for the mobile phone battery as claimed in claim 1, wherein the flame retardant is any one of 593 solid resistance or 593 liquid resistance.
9. A method for preparing a soaking heat-dissipation fireproof film for a mobile phone battery according to claim 2, which comprises the following steps:
s1. preparation of fireproof layer
Mixing and dissolving the main resin A and a solvent, adding a flame retardant and a heat-conducting filler, carrying out ultrasonic stirring, and adding the solvent to adjust the viscosity; adding a curing agent, and stirring to obtain a fireproof liquid; uniformly coating the base material in a transfer printing mode, and drying to obtain a fireproof coating for later use;
s2. preparation of heat-conducting glue solution
Mixing and dissolving the main body resin B and the solvent, adding the heat-conducting filler and the curing agent B in the stirring process, uniformly stirring, and filtering to obtain a heat-conducting glue solution for later use;
s3, preparing the uniform heat layer
Dissolving the waterborne polyurethane resin in water, adding graphene, performing ultrasonic dispersion, and adjusting the viscosity by water; adding nano silver wire slurry and stirring uniformly at a low speed; after filtering, uniformly coating the mixture on a fireproof layer by scraping to obtain a material with a soaking layer;
s4, preparation of uniform-heat-dissipation fireproof film
And (3) coating the obtained heat-conducting glue solution on a substrate by scraping, and transferring to a uniform heating layer of a uniform heating layer material to obtain the uniform heating heat-dissipation fireproof film.
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