CN115863893A - Terminal device - Google Patents
Terminal device Download PDFInfo
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- CN115863893A CN115863893A CN202310048669.7A CN202310048669A CN115863893A CN 115863893 A CN115863893 A CN 115863893A CN 202310048669 A CN202310048669 A CN 202310048669A CN 115863893 A CN115863893 A CN 115863893A
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- flame
- terminal device
- retardant
- fire
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application provides a terminal device, including casing, battery and fire-retardant layer, fire-retardant level is located between battery and the casing, and fire-retardant layer is cotton and fire-retardant filler including the bubble, and the bubble is cotton to have a plurality of holes, and fire-retardant filler is filled in the hole. Fill fire-retardant filler in the cotton hole of bubble and form fire-retardant layer jointly, fire-retardant level is located between battery and the casing, and the bubble cotton in fire-retardant layer has the compressibility, and the cotton thickness of bubble is variable, can play the buffering and prevent the effect of abnormal sound, and fire-retardant layer can also play fire-retardant effect under the prerequisite that does not increase the whole thickness of terminal device, does not change the intensity of casing. The flame-retardant filler is filled in the foam to form a flame-retardant layer, so that the foam is easy to process and replace and has strong operability.
Description
Technical Field
The application relates to the technical field of flame retardance, in particular to a terminal device with a flame retardant function.
Background
The battery is arranged in the mobile phone, and the battery may be on fire due to short circuit or collision and the like caused by long-term use, so that other elements in the mobile phone are damaged, and even the surrounding environment is damaged. The flame retardant function of the existing mobile phone is difficult to meet the requirements of users.
Disclosure of Invention
The application provides a terminal device, including casing, battery and fire-retardant layer, fire-retardant layer is located between battery and the casing, and fire-retardant layer is cotton and fire-retardant filler including the bubble, and the bubble is cotton to have a plurality of holes, and fire-retardant filler is filled in the hole.
In the above-mentioned design, pack fire-retardant filler in the cotton hole of bubble and form fire-retardant layer jointly, fire-retardant layer is located between battery and the casing, and the bubble cotton in fire-retardant layer has the compressibility, and the cotton thickness of bubble is variable, can play the buffering and prevent the effect of abnormal sound, and fire-retardant layer can also play fire-retardant effect under the prerequisite that does not increase the whole thickness of terminal device, does not change the intensity of casing. The flame-retardant filler is filled in the foam to form a flame-retardant layer, so that the foam is easy to process and replace and has strong operability.
In some embodiments of the present application, the flame retardant layer is bonded to the cell-facing surface of the housing.
In the design, the flame-retardant layer is arranged on the surface of the shell in a bonding mode, so that the terminal device is convenient to assemble, and the performance of the shell is not influenced.
In some embodiments of the present application, the porosity of the foam is greater than or equal to 80%.
In the design, the foam has larger porosity, so that the flame-retardant filler can be fully immersed in the foam to form a flame-retardant layer with more uniform flame-retardant property when the flame-retardant layer is manufactured; when the porosity of the foam is large, the foam is easy to compress and assemble the flame-retardant layer, and after the flame-retardant layer formed after filling the flame-retardant filler is assembled between the battery and the shell, the resistance acting force of the flame-retardant layer on the battery and the shell is small; in addition, when the porosity of the foam is larger, the density of the foam is reduced, the overall quality of the flame-retardant layer is reduced,
in some embodiments of the present disclosure, the flame retardant filler includes an aqueous film-forming resin filled in the pores, a blowing agent, a char-forming agent, and a catalyst dispersed in the aqueous film-forming resin.
In the design, based on the expansion flame-retardant principle, the flame-retardant layer has longer flame-retardant time and better operability and processability.
In some embodiments of the present application, the flame retardant filler comprises 10-50 parts by mass of the aqueous film-forming resin, 15-30 parts by mass of the blowing agent, 2-10 parts by mass of the char-forming agent, and 3-15 parts by mass of the catalyst.
In the design, the proportion of the flame-retardant filler is beneficial to improving the flame-retardant property of the flame-retardant layer.
In some embodiments herein, the aqueous film-forming resin is selected from at least one of acrylic resins, styrene-acrylic resins, vinyl acetate-vinyl versatate, and silicon-containing acrylic resins.
The above design is a possible embodiment of the aqueous film-forming resin.
In some embodiments herein, the blowing agent is selected from at least one of melamine, dicyandiamide, chlorinated paraffin, and urea.
The above design is a possible embodiment of the blowing agent.
In some embodiments herein, the char-forming agent is selected from at least one of pentaerythritol, dipentaerythritol.
In the above design, the carbon forming agent may be implemented.
In some embodiments herein, the catalyst is selected from at least one of a salt, ester, or a phthalein based compound containing phosphoric acid, sulfuric acid, or boric acid.
The above design is a possible embodiment of the catalyst.
In some embodiments of the present application, the catalyst is at least one of ammonium polyphosphate, magnesium ammonium phosphate, and melamine phosphate.
In the design, salt compounds containing amine and phosphoric acid are inorganic phosphorus materials, the molecules contain phosphorus and nitrogen elements, a synergistic effect can be generated in the flame-retardant process, the phosphorus element can interact with a charring agent to form a non-flammable phosphorus-containing carbonized layer, and the nitrogen element can form non-flammable gases such as nitrogen, nitrogen dioxide and the like; in addition, the salt compounds of phosphoric acid have the characteristics of large phosphorus content, high nitrogen content, good thermal stability, good dispersibility, no toxicity, no odor and no generation of corrosive gas in the flame retardant process.
In some embodiments of the present disclosure, the flame retardant filler further comprises at least one of an inorganic filler, a dispersant, a defoamer, a plasticizer, a film forming aid, a thickener, and a coupling agent.
In the above design, the inorganic filler is used to improve the flame retardancy and thermal stability of the flame retardant filler; the dispersing agent is used for improving the dispersing effect of various components in the aqueous film-forming resin; the defoaming agent is used for eliminating air bubbles in the aqueous film-forming resin; the plasticizer is used for increasing the toughness of the aqueous film-forming resin; the coupling agent can improve the bonding strength between the foam and the aqueous film-forming resin; thickeners are used to increase the viscosity of the aqueous film-forming resin.
Drawings
Fig. 1 is a schematic cross-sectional view of a housing provided in the related art of the present application.
Fig. 2 is a schematic cross-sectional view of a housing provided in another related art of the present application.
Fig. 3 is an exploded schematic view of a terminal device according to an embodiment of the present disclosure.
Fig. 4 is a schematic flowchart of a process for manufacturing a terminal device according to an embodiment of the present application.
Description of the main elements
100: terminal device
10. 10', 10": shell body
12. 12', 12": body
14. 14', 14": ink layer
20: battery with a battery cell
25: screen
30: flame retardant layer
32: foam cotton
321: hole(s)
34: flame-retardant filler
40: colloid
50', 50": flame retardant
Detailed Description
In order that the above objects, features and advantages of the present application can be more clearly understood, a detailed description of the present application will be given below with reference to the accompanying drawings and detailed description. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the following description, numerous specific details are set forth to provide a thorough understanding of the present application, and the described embodiments are merely a subset of the embodiments of the present application, rather than all embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes all and any combination of one or more of the associated listed items.
In various embodiments of the present application, for convenience in description and not limitation, the term "coupled" as used in the specification and claims of the present application is not limited to physical or mechanical connections, either direct or indirect. "upper", "lower", "above", "below", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
Referring to fig. 1, in the related art, a housing 10 'is provided, wherein the housing 10' is configured to be disposed at one side of a battery (not shown). The case 10 'includes a body 12' and an ink layer 14 'disposed on a surface of the body 12', the ink layer 14 'is disposed on a surface of the body 12' facing the battery, and the ink layer 14 'is filled with a fire retardant 50'. When the battery burns, isocyanate groups (-N = C = O) in the flame retardant 50 'react with hydroxyl groups (-OH) to form a cross-linked network-like, macromolecular chain structure, i.e., the flame retardant 50' can form a film layer with flame retardant properties to isolate oxygen, thereby being beneficial to preventing the battery from further burning.
To ensure the flame retardant performance of the flame retardant 50', on one hand, the overall thickness of the housing 10' can be increased by increasing the thickness of the ink layer 14' (e.g., over 50 μm). On the other hand, a large amount of fire retardant 50 'may be added to the ink layer 14', and the addition of a large amount of fire retardant 50 'may reduce the reliability of the ink layer 14' and the bonding force between the ink layer 14 'and the case 10'. In addition, the flame retardant time is short and the flame retardant effect is poor by adopting the flame retardant principle.
Referring to fig. 2, in other related technologies, the fire retardant 50 is not added to the ink layer 14 "and the fire retardant 50 is added to the body 12", so as to achieve the fire retardant effect of the housing 10 ". However, the addition of the flame retardant 50 "to the body 12" affects the color of the body 12", and the transmittance of the body 12" decreases; in addition, the addition of the flame retardant 50 to the body 12 "reduces the strength of the body 12", and tends to cause puncture cracking, drop cracking, or the like of the case 10 ".
Referring to fig. 3, the present embodiment provides a terminal device 100 with a flame retardant function, and the terminal device 100 may be an electronic product including a battery 20, such as a mobile phone, a watch, a tablet computer, a charger, and the like. In the present embodiment, the terminal device 100 is taken as a mobile phone as an example for explanation. The terminal device 100 may include a battery 20, a screen 25, a housing 10 and a flame retardant layer 30, wherein the battery 20 and the flame retardant layer 30 are accommodated in a space enclosed by the screen 25 and the housing 10.
Referring to fig. 4, the casing 10 includes a main body 12 and an ink layer 14 disposed on a surface of the main body 12, wherein the main body 12 may be made of transparent plastic, and the ink layer 14 is disposed on a surface of the main body 12 facing the battery 20 for shielding the surface of the main body 12. The flame retardant layer 30 is located between the casing 10 and the battery 20 and completely covers the battery 20, that is, the projection of the battery 20 on the casing 10 is located in the projection area of the flame retardant layer 30 on the casing 10, the flame retardant layer 30 can play a role in buffering to avoid the direct rigid contact between the battery 20 and the casing 10, and the flame retardant layer 30 can also play a role in flame retarding.
Specifically, the flame retardant layer 30 includes a foam 32 and a flame retardant filler 34 filled in the foam 32, the foam 32 has a plurality of holes 321, and the flame retardant filler 34 is filled in the holes 321 of the foam 32. The foam 32 may be made of one of Polyurethane (PU), polyvinyl chloride (PVC), polyethylene (PE), and ethylene-vinyl acetate copolymer (EVA). The foam 32 has excellent cushioning properties, while also having intumescent flame retardancy, sealability, compressibility and environmental protection properties. Therefore, the foam 32 is located between the battery 20 and the housing 10, which can play a role in buffering, sealing, waterproofing and flame retarding. In some embodiments, when the compression ratio of the foam 32 is greater than 25%, the compactness of the foam 32 is significantly improved, thereby having good waterproof performance.
In some embodiments, the porosity of the foam 32 is greater than or equal to 80% such that when the flame retardant layer 30 is made, the flame retardant filler 34 is able to sufficiently impregnate the foam 32 to form a flame retardant layer 30 with more uniform flame retardant properties; when the porosity of the foam 32 is large, the foam 32 is easily compressed, the assembly of the flame retardant layer 30 is easy, and after the flame retardant layer 30 formed after filling the flame retardant filler 34 is assembled between the battery 20 and the case 10, the resistance acting force of the flame retardant layer 30 on the battery 20 and the case 10 is small; in addition, when the porosity of the foam 32 is larger, the density of the foam 32 is reduced, and the overall mass of the flame retardant layer 30 is reduced, and in some embodiments, the density of the foam 32 is less than 0.4g/cm 3 。
The flame retardant filler 34 may include an aqueous film-forming resin, a foaming agent, a char-forming agent, and a catalyst, which are mixed with each other and filled in the pores 321 of the foam 32, as a main component, and dispersed in the aqueous film-forming resin, so as to be integrated with the foam 32.
In the process of manufacturing the flame retardant layer 30, 10-50 parts by mass of a monomer of an aqueous film-forming resin, 15-30 parts by mass of a foaming agent, 2-10 parts by mass of a char-forming agent and 3-15 parts by mass of a catalyst are added into 5-15 parts by mass of water and mixed to form a slurry, wherein the monomer of the aqueous film-forming resin can be dissolved in the water and undergo a polymerization reaction to form the aqueous film-forming resin, and the foaming agent, the char-forming agent, the catalyst and the like are dispersed in the water and the aqueous film-forming resin. The slurry thus formed is filled in the pores 321 of the foam 32 and then cured, and water is evaporated to form the flame retardant layer 30. The flame retardant layer 30 may be adhered to the case 10 by a gel 40 (e.g., a pressure sensitive adhesive), and the flame retardant layer 30 may be cut to a size capable of covering the battery 20. In the process of assembling the terminal device 100, the flame retardant layer 30 is located on the surface of the housing 10 facing the battery 20 and corresponding to the position of the battery 20, and then is assembled with other components of the terminal device 100, so as to obtain the complete terminal device 100. The flame retardant layer 30 is provided so that the terminal device 100 has a flame retardant function.
Aqueous film-forming resins are polymers formed after dissolution of the monomers in water, and can function as film-forming agents. The aqueous film-forming resin may be at least one selected from the group consisting of acrylic resins, styrene-acrylic resins, vinyl acetate-vinyl versatate, and silicon-containing acrylic resins. In the process of manufacturing the waterproof layer, the monomer is dissolved in water, and the technical scheme that the solvent type film forming resin is formed by dissolving the monomer of the solvent type film forming resin in an organic solvent is replaced. On one hand, the aqueous film-forming resin is green and environment-friendly, and can directly avoid the use of organic solvents; on the other hand, the solvent-based film-forming resin can generate a large amount of toxic gas in the combustion process, and the water-based film-forming resin is more environment-friendly and safer in the flame-retardant process.
The catalyst can be a salt, ester or a phthalein amine compound containing phosphoric acid, sulfuric acid or boric acid, and the like. The catalyst is preferably a salt compound containing an amine and a phosphoric acid, such as ammonium polyphosphate, magnesium ammonium phosphate, melamine phosphate, or the like. The salt compound containing amine and phosphoric acid is an inorganic phosphorus material, the molecule contains phosphorus and nitrogen elements, a synergistic effect can be generated in the flame-retardant process, the phosphorus element can interact with a charring agent to form a non-flammable phosphorus-containing carbonized layer, and the nitrogen element can form nitrogen, nitrogen dioxide and other non-flammable gases; in addition, the salt compounds of phosphoric acid have the characteristics of large phosphorus content, high nitrogen content, good thermal stability, good dispersibility, no toxicity, no odor and no generation of corrosive gas in the flame retardant process.
The foaming agent may be at least one selected from melamine, dicyandiamide, chlorinated paraffin, and urea. The foaming agent can release non-combustible gas such as carbon dioxide, ammonia gas, nitrogen dioxide and the like at a certain temperature.
The charring agent is rich in cyano and carbon, can generate a carbonized layer at a certain temperature, and can be selected from at least one of pentaerythritol and dipentaerythritol.
When the battery 20 is on fire, the aqueous film-forming resin can be melted and softened when encountering fire; the foaming agent releases a large amount of non-combustible gases such as carbon dioxide, ammonia gas, nitrogen dioxide and the like, and the molten aqueous film-forming resin is blown up to form a porous expansion layer; meanwhile, the catalyst is dehydrated and decomposed into acidic substances and non-combustible gas at a certain temperature, the acidic substances can absorb heat on one hand, on the other hand, the carbonizing agent is promoted to be rapidly decomposed into a non-combustible carbonization layer, meanwhile, the carbonization layer is rapidly expanded under the action of the non-combustible gas generated by decomposition of the foaming agent, and the carbonization layer and the expanded water-based film-forming resin jointly form an even and compact cellular foam structure, and the cellular foam structure can protect other elements around the battery 20 from being combusted, isolate oxygen and reduce the heat conductivity coefficient, thereby prolonging the flame retardant time, realizing the long-acting expansion flame retardant function and reducing the possibility that flame is transferred to the surrounding environment.
The flame-retardant layer 30 provided in the embodiment of the present application is based on the expansion flame-retardant principle, and compared with the flame-retardant principle adopting the non-expansion principle (i.e., the scheme of adding the flame retardant 50' or 50 ″ capable of forming a film layer when being heated in the ink layer 14 or the body 12), the flame-retardant layer 30 of the present application has longer flame-retardant time. The flame retardant layer 30 can be adhered to the surface of the housing 10 without affecting the puncture resistance of the housing 10 and the reliability of the ink coating, and has good operability and processability, and after the flame retardant property is realized, a new flame retardant layer 30 is replaced.
The flame-retardant filler 34 may further include an auxiliary agent in an amount of 0.5 to 20 parts by mass, and the auxiliary agent includes at least one of an inorganic filler, a dispersant, a defoamer, a plasticizer, a film-forming auxiliary agent, a thickener, and a coupling agent. The inorganic filler is used to improve the flame retardancy and thermal stability of the flame retardant filler 34. The dispersing agent is used for improving the dispersing effect of various components in the aqueous film-forming resin. In the process of manufacturing the flame retardant layer 30, the water-insoluble component is dispersed in water, and the dispersant can be adsorbed on the liquid-solid interface, which can significantly reduce the liquid-solid interface free energy, so that the solid particles are uniformly and stably dispersed in water, and after the curing step, the water-insoluble component can be uniformly dispersed in the aqueous film-forming resin. The defoaming agent is used for eliminating air bubbles in the aqueous film-forming resin in the process of manufacturing the flame-retardant layer 30, and is beneficial to processing and production of the flame-retardant layer 30. The plasticizer is used for increasing the toughness of the aqueous film-forming resin, so that the wetting and the combination of the aqueous film-forming resin and the foam 32 are facilitated. The coupling agent can improve the bonding strength between the foam 32 and the aqueous film-forming resin; thickeners are used to increase the viscosity of the aqueous film-forming resin.
The terminal device 100 that this application embodiment provided, fill fire-retardant 34 in the hole 321 of bubble cotton 32 and form fire-retardant layer 30, fire-retardant layer 30 is located between battery 20 and the casing 10, the bubble cotton 32 in fire-retardant layer 30 has the compressibility, the thickness of bubble cotton 32 is variable, can play the buffering and prevent the effect of abnormal sound, fire-retardant layer 30 is not increasing terminal device 100 whole thickness, under the prerequisite of the intensity of not changing casing 10, can also play fire-retardant effect. The flame-retardant filler 34 is filled in the foam 32 to form the flame-retardant layer 30, so that the processing and the replacement are easy, and the operability is strong.
Although the present application has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the present application.
Claims (11)
1. A terminal device, comprising:
a housing;
a battery; and
the flame-retardant layer is positioned between the battery and the shell and comprises foam and flame-retardant filler, the foam is provided with a plurality of holes, and the flame-retardant filler is filled in the holes.
2. A terminal device according to claim 1, wherein the flame retardant layer is bonded to the surface of the housing facing the battery.
3. A termination arrangement as claimed in claim 1, characterised in that the foam has a porosity of 80% or more.
4. A terminal device according to claim 1, wherein the flame retardant filler comprises an aqueous film forming resin filled in the pores, a blowing agent, a char-forming agent and a catalyst dispersed in the aqueous film forming resin.
5. A terminal device according to claim 1, wherein the flame retardant filler comprises 10-50 parts by mass of an aqueous film-forming resin, 15-30 parts by mass of a blowing agent, 2-10 parts by mass of a char-forming agent, and 3-15 parts by mass of a catalyst.
6. A terminal device as claimed in claim 5, wherein the aqueous film-forming resin is selected from at least one of acrylic resins, styrene-acrylic resins, vinyl acetate-vinyl versatate and silicon-containing acrylic resins.
7. A terminal device according to claim 5, characterized in that the foaming agent is selected from at least one of melamine, dicyandiamide, chlorinated paraffin and urea.
8. A terminal device according to claim 5, wherein the char-forming agent is selected from at least one of pentaerythritol and dipentaerythritol.
9. A terminal device according to claim 5, wherein the catalyst is selected from at least one of a salt, an ester or a phthalein based compound comprising phosphoric acid, sulfuric acid or boric acid.
10. A terminal device according to claim 9, characterised in that the catalyst is at least one of ammonium polyphosphate, magnesium ammonium phosphate and melamine phosphate.
11. A terminal device as claimed in claim 5, characterised in that the flame-retardant filler also includes at least one of an inorganic filler, a dispersant, a defoamer, a plasticizer, a film-forming aid, a thickener and a coupling agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310048669.7A CN115863893B (en) | 2023-01-31 | 2023-01-31 | Terminal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310048669.7A CN115863893B (en) | 2023-01-31 | 2023-01-31 | Terminal device |
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| CN115863893A true CN115863893A (en) | 2023-03-28 |
| CN115863893B CN115863893B (en) | 2023-07-18 |
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| Publication number | Publication date |
|---|---|
| CN115863893B (en) | 2023-07-18 |
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