阅读说明：本技术 热减粘保护膜及应用其的电子装置 (Thermal anti-sticking protective film and electronic device using same ) 是由 陈远胜 于 2021-01-29 设计创作，主要内容包括：本申请提供一种热减粘保护膜及应用其的电子装置,所述热减粘保护膜用于电子装置中电池与终端主体的固定,所述热减粘保护膜包括基材层,所述基材层的一个表面设置功能层,所述基材层的另一表面设置功能层或胶水层,所述功能层包括导电发热层和热减粘胶层,所述导电发热层设置于所述基材层与所述热减粘胶层之间。本申请所述热减粘保护膜具有厚度降低、设计简单、操作简化和成本降低的有益效果,解决了电池与终端主体之间既要可靠固定又能便利拆卸的矛盾。(The application provides a heat subtracts and glues protection film and use its electronic device, heat subtracts to glue the protection film and is arranged in the fixed of battery and terminal main part among the electronic device, heat subtracts to glue the protection film and includes the substrate layer, a surface of substrate layer sets up the functional layer, another surface of substrate layer sets up functional layer or glue layer, the functional layer includes electrically conductive layer and the heat of generating heat subtracts the viscose glue film, electrically conductive layer that generates heat set up in the substrate layer with between the heat subtracts the viscose glue film. The application the thermal visbreaking protective film has the beneficial effects of reduced thickness, simple design, simplified operation and reduced cost, and solves the contradiction between the battery and the terminal main body, namely reliable fixation and convenient disassembly.)

1. The utility model provides a thermal visbreaking protection film for battery and terminal main part's is fixed, its characterized in that, thermal visbreaking protection film includes the substrate layer, a surface of substrate layer sets up the functional layer, another surface of substrate layer sets up functional layer or glue layer, the functional layer includes electrically conductive layer and the thermal visbreaking glue film that generates heat, electrically conductive layer that generates heat set up in the substrate layer with between the thermal visbreaking glue film.

2. The thermal de-bonding protective film according to claim 1, wherein the thickness of the thermal de-bonding protective film is 0.1 to 0.4 mm.

3. The thermal anti-sticking protective film according to claim 2, wherein the thickness of the base material layer is 0.005 to 0.05mm, the thickness of the thermal anti-sticking adhesive layer is 0.02 to 0.2mm, the thickness of the conductive heat generating layer is 0.001 to 0.005mm, and the thickness of the adhesive layer is 0.02 to 0.15 mm.

4. The thermal anti-sticking protective film according to claim 1, wherein an electrode is provided on the conductive heat generating layer in contact with the conductive heat generating layer, the electrode being for making an electric current uniformly pass through the conductive heat generating layer.

5. The thermal de-bonding protective film according to claim 4, wherein the material of the electrode comprises at least one of copper and silver.

6. The thermal de-bonding protective film according to claim 4, wherein the electrodes are printed, attached or electroplated on the conductive heat generating layer.

7. The thermal de-bonding protective film according to claim 1, wherein the thermal de-bonding adhesive layer is formed of a thermal de-bonding adhesive, the thermal de-bonding adhesive has a viscosity of 1000 to 3000 grams force, and the viscosity of the thermal de-bonding adhesive is reduced to 0 to 100 grams force after the thermal de-bonding adhesive is heated at a temperature of 70 to 110 ℃ for a duration of 5 to 180 seconds.

8. The thermal de-bonding protective film according to claim 1, wherein the glue layer is formed by glue, and the viscosity of the glue is 1000-3000 grams of force.

9. The thermal de-bonding protective film according to claim 1, wherein the conductive heat generating layer is made of at least one material selected from the group consisting of silver, nickel, and conductive graphite.

10. The thermal de-bonding protective film according to claim 1, wherein the material of the substrate layer is polyethylene terephthalate or polyimide.

11. The thermal detackifying protective film of claim 1, wherein the thermal detackifying adhesive layer is comprised of a thermal detackifying adhesive including at least one of a resin, a curing agent, a solvent, a foaming agent, and a toner.

12. An electronic device characterized in that the electronic device comprises a terminal body and a battery which is attached and fixed to the terminal body through the thermal de-bonding protective film according to any one of claims 1 to 11.

Technical Field

The present application relates to the field of adhesive technology, and more particularly, to a thermal de-bonding protective film suitable for the assembly of a battery and a terminal body.

Background

With the continuous development of mobile terminals, terminal products tend to be thinner and thinner, and various flexible package batteries are widely used. With the increasing competition, the requirements of terminal products on small size, high energy density, low cost, easy maintenance and the like of batteries are more and more prominent.

At present, there are three main ways for fixing the flexible package battery in the market. The first is to adopt the easy-to-draw to paste + the fixed mode of double faced adhesive tape: firstly, the detachable easy-to-pull sticker and the handle part are pasted on the battery, and then the high-viscosity double-sided adhesive tape is pasted on the surface of the easy-to-pull sticker, so that the battery can be fixed on the host of the mobile terminal. When the battery needs to be disassembled or repaired, the pull handle of the easy-to-pull sticker is pulled, the easy-to-pull sticker is separated from the surface of the battery, and then the battery can be disassembled. The second is a mode of adopting easy-to-draw glue for fixation: a protective film is pasted on one surface of the battery close to the mobile terminal, and then one or even a plurality of strip-shaped easy-to-pull adhesives are pasted between the battery and the mobile terminal, so that the battery can be fixed on the mobile terminal. When the battery needs to be repaired or disassembled, the easy-to-draw glue can be removed by slowly pulling the handle which is left outside by the easy-to-draw glue, so that the battery can be taken down. The third is that the double faced adhesive tape is directly pasted between the battery and the mobile terminal for fixation, and the battery can be taken out after the double faced adhesive tape loses viscosity through violence disassembly or special solvent soaking of the double faced adhesive tape in the battery bin when the battery needs to be taken out.

In the first method and the second method, the battery may be damaged during the process of taking out the battery, so that the battery cannot be used again, and the repair cost is high. If the handle is broken by carelessness, the battery can be taken out violently. Moreover, the two designs require multi-layer material stacking, so that the space of the battery bin is greatly occupied, the mobile terminal becomes thicker, or the capacity of the battery is reduced. In addition, the two designs have the advantages of large quantity of materials, high requirement on material performance and high requirement on attached operation normative, so that the material cost and the working hour cost are greatly increased. The third method occupies a small space, but the battery is difficult to take out, and the possibility of scrapping the battery after taking out the battery is very high, thereby greatly increasing the repair cost.

Disclosure of Invention

In view of the above, there is a need for a novel thermal anti-adhesive protective film for fixing a battery to a terminal body, which can be reliably fixed and conveniently detached, and which has the advantages of reduced overall thickness, easy operation and reduced cost.

In order to achieve the purpose, the technical scheme of the application is as follows: the heat visbreaking protective film comprises a substrate layer, one surface of the substrate layer is provided with a functional layer, the other surface of the substrate layer is provided with a functional layer or a glue layer, the functional layer comprises a conductive heating layer and a heat visbreaking glue layer, and the conductive heating layer is arranged between the substrate layer and the heat visbreaking glue layer.

The thermal de-bonding protective film has two forms of arranging a thermal de-bonding layer on a single surface and arranging a thermal de-bonding layer on two surfaces, and the function of quick disassembly can be realized only by arranging one thermal de-bonding layer on one surface. If only one side is the thermal de-bonding glue layer, the electrically conductive layer that generates heat that corresponds is at least one deck, and at least one deck electrically conductive layer that generates heat sets up to the same one side of substrate with the thermal de-bonding glue layer, the opposite side of substrate layer, also can set up electrically conductive layer that generates heat between substrate layer and the glue layer promptly. If both sides all have the thermal visbreaking glue layer, the substrate both sides all are provided with the electrically conductive layer that generates heat.

In one embodiment, the thickness of the thermal anti-sticking protective film is 0.1-0.4 mm. Wherein, the thickness of substrate layer is 0.005 ~ 0.05mm, the thickness of heat visbreaking glue film is 0.02 ~ 0.2mm, the thickness on electrically conductive layer that generates heat is 0.001 ~ 0.005mm, the thickness on glue layer is 0.02 ~ 0.15 mm.

In one embodiment, the conductive heating layer is provided with an electrode in contact with the conductive heating layer, and the electrode is used for enabling current to uniformly pass through the conductive heating layer. In order to ensure that the thermal viscosity reducing adhesive layer can be quickly and uniformly viscosity reduced, the two ends of the conductive heating layer are provided with electrodes, so that the current can uniformly pass through the conductive heating layer, and the phenomenon that the current at each part of the conductive heating layer is not uniform is avoided.

In one embodiment, the material of the electrode includes at least one of copper and silver. The electrode can also be made of other metals with good conductivity.

In one embodiment, the electrode is disposed on the conductive heating layer by printing, attaching or electroplating, so that the electrode is in direct contact with the conductive heating layer.

In one embodiment, the thermal viscosity reducing adhesive layer is composed of thermal viscosity reducing adhesive, the viscosity of the thermal viscosity reducing adhesive is 1000 to 3000 grams force (gf), and the viscosity of the thermal viscosity reducing adhesive is reduced to 0 to 100 gf after the thermal viscosity reducing adhesive is heated at a temperature of 70 to 110 ℃ for a duration of 5 to 180 seconds. The thermal reduction adhesive has adhesive force under the normal temperature condition, can be adhered like a common adhesive (glue), but can be easily peeled off after the adhesive force is reduced or even disappears after being heated. The temperature range of 70-110 ℃ is within the safety range of the battery, the battery is not damaged and can be recycled, and the terminal is not affected.

In one embodiment, the glue layer is formed by glue, and the viscosity of the glue is 1000-3000 gram force (gf). The glue is a conventional glue capable of bonding two objects, such as polyacrylic resin, polyurethane adhesive, synthetic adhesive, and the like.

In one embodiment, the conductive heat generating layer is made of at least one of silver, nickel and conductive graphite. In addition, other conductive materials meeting the impedance requirement can be used as the material of the conductive heating layer. The heating principle of the conductive heating layer is as follows: the conductor is arranged in the conductive heating layer and has certain impedance, and according to the Joule law, the heat generated by the current passing through the conductor is proportional to the square of the current, the resistance of the conductor and the electrifying time, so that the conductor can generate heat after being electrified. The heat generated by the conductive heating layer can be accurately controlled by reasonably controlling the impedance, the passing current and the electrifying time of the conductive heating layer so as to reach the temperature required by viscosity reduction of the thermal viscosity reduction adhesive layer.

In one embodiment, the material of the substrate layer is polyethylene terephthalate (PET) or Polyimide (PI).

In one embodiment, the thermal visbreaker layer is comprised of a thermal visbreaker including at least one of a resin, a curing agent, a solvent, a foaming agent, and a toner.

The application also provides an electronic device, which comprises a terminal body and a battery, wherein the battery is fixedly connected with the terminal body through the thermal de-bonding protective film.

The application provides a hot visbreaking protection film is applied to fixing between battery and the terminal main part, has thickness reduction, simple design, the operation is simplified and cost reduction's beneficial effect, has solved the contradiction that not only can reliably fix but also can conveniently dismantle between battery and the terminal main part.

Drawings

The present application will be described in further detail with reference to the following drawings and detailed description.

Fig. 1 is a schematic structural diagram of a thermal anti-sticking protective film according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a thermal anti-sticking protective film according to an embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a thermal anti-sticking protective film according to an embodiment of the present disclosure.

Fig. 4 is a schematic structural diagram of a thermal anti-sticking protective film according to an embodiment of the present disclosure.

Fig. 5 is a schematic view illustrating an assembly of a thermal de-bonding protective film and a battery according to an embodiment of the present disclosure.

Fig. 6A is a top view of fig. 5.

Fig. 6B is a schematic cross-sectional view of fig. 6A taken along a-a.

Fig. 7 is a schematic diagram of an applied power supply according to an embodiment of the present application.

Fig. 8 is a schematic diagram of an applied power supply according to an embodiment of the present application.

Fig. 9 is a schematic diagram of an applied power supply according to an embodiment of the present application.

Description of the main element symbols:

thermal de-bonding protective film 100

Battery 200

Battery compartment 300

Substrate layer 10

Functional layer 30

Glue layer 50

Electrode 40

Conductive heating layer 31

Thermal detackifying adhesive layer 32

The following detailed description will further describe embodiments of the present application in conjunction with the above-described figures.

Detailed Description

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 the embodiments of this application belong. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application.

The present application provides a thermal de-bonding protective film 100 for fixation of a battery to a terminal body. Referring to fig. 1 and 2, the thermal anti-sticking protection film 100 includes a substrate layer 10, a functional layer 30 is disposed on one surface of the substrate layer 10, the functional layer 30 or a glue layer 50 is disposed on the other surface of the substrate layer 10, the functional layer 30 includes a conductive heating layer 31 and a thermal anti-sticking glue layer 32, and the conductive heating layer 31 is disposed between the substrate layer 10 and the thermal anti-sticking glue layer.

As shown in fig. 1 and 2, the thermal anti-adhesive protective film 100 has two forms, namely, a thermal anti-adhesive layer 32 disposed on one side and a thermal anti-adhesive layer 32 disposed on both sides, and the function of quick detachment can be realized only by providing one side with the thermal anti-adhesive layer 32. If only one side is the thermal de-bonding glue layer 32, the corresponding conductive heating layer 31 is at least one layer, at least one layer of conductive heating layer 31 and the thermal de-bonding glue layer 32 are arranged on the same side of the base material layer 10, and the other side of the base material layer 10, namely, the conductive heating layer 31 can be arranged between the base material layer 10 and the glue layer 50. If both sides have the thermal de-bonding adhesive layer 32, both sides of the substrate layer 10 are provided with the conductive heating layers 31. The material of the substrate layer is polyethylene terephthalate (PET) or Polyimide (PI). The glue layer 50 is made of glue, and the viscosity of the glue is 1000-3000 gram force (gf). The glue is a conventional glue capable of bonding two objects, such as polyacrylic resin, polyurethane adhesive, synthetic adhesive, and the like.

The thermal viscosity reducing adhesive layer 32 is composed of thermal viscosity reducing adhesive, the viscosity of the thermal viscosity reducing adhesive is 1000-3000 gram-force (gf), and when the thermal viscosity reducing adhesive is heated at a temperature of 70-110 ℃ for 5-180s, the viscosity of the thermal viscosity reducing adhesive is reduced to 0-100 gram-force. The thermal viscose glue is a mature product on the market and is generally made of resin, a curing agent, a solvent, a foaming agent, toner and the like. The thermal reduction adhesive has adhesive force under the normal temperature condition, can be adhered like a common adhesive (glue), but can be easily peeled off after the adhesive force is reduced or even disappears after being heated. The temperature range of 70-110 ℃ is within the safety range of the battery, the battery cannot be damaged and can be recycled, and the terminal body cannot be influenced.

In some embodiments, the material of the conductive heat generating layer 31 includes at least one of silver, nickel and conductive graphite. Silver, nickel, graphite and the like are conductive products which are widely applied, and the conductive heating layer 31 is made without great technical difficulty. In addition, other conductive materials meeting the impedance requirement can be used as the material of the conductive heating layer. The heating principle of the conductive heating layer 31 is as follows: a conductor (a conductive material such as silver, nickel, or graphite) having a certain resistance is present in the conductive heat generating layer 31, and the heat generated by the current passing through the conductor is proportional to the square of the current, proportional to the resistance of the conductor, and proportional to the time of energization according to joule's law, and thus can generate heat after energization. By reasonably controlling the impedance, the passing current and the electrifying time of the conductive heating layer 31, the heat generated by the conductive heating layer 31 can be accurately controlled to reach the temperature required by the viscosity reduction of the thermal viscosity reduction adhesive layer 32.

In some embodiments, the thickness of the thermal anti-sticking protective film 100 is 0.1 to 0.4 mm. Further, the thickness of substrate layer 10 is 0.005 ~ 0.05mm, the thickness of thermal visbreaking glue film 32 is 0.02 ~ 0.2mm, the thickness of electrically conductive layer 31 that generates heat is 0.001 ~ 0.005mm, the thickness of glue layer 50 is 0.02 ~ 0.15 mm.

As shown in fig. 3 and 4, the conductive heat generating layer 31 is provided with an electrode 40 contacting the conductive heat generating layer 31. In order to rapidly and uniformly de-bond the thermal de-bonding adhesive layer 32, the two ends of the conductive heating layer 31 are provided with the electrodes 40, so that the current uniformly passes through the conductive heating layer 31, and the current non-uniformity of the conductive heating layer 31 is not caused. Further, the material of the electrode 40 includes at least one of copper and silver. It is understood that the electrode 40 may be made of other metals with good electrical conductivity. Further, the electrode 40 is disposed on the conductive heating layer 31 by printing, attaching or electroplating, so that the electrode 40 is directly contacted with the conductive heating layer 31.

TABLE 1

Table 1 shows the voltage and current and the time required for heating the conductive heating layer provided with different electrodes. A copper foil electrode is provided on the conductive heat generation layer 31, and the resistance (sheet resistance) of the copper foil electrode is 23.8 Ω/sq. Electrifying for 11s under the conditions that the voltage is 11.2V and the current is 0.45A, wherein the temperature can reach 90 ℃; the temperature can reach 100 ℃ when the power is supplied for 8s under the conditions that the voltage is 12.1V and the current is 0.45A. A silver-coated electrode (silver wire is in nanometer level) is arranged on the conductive heating layer 31, and the resistance (square resistance) of the silver-coated electrode is 17 omega/sq. Electrifying for 10s under the conditions that the voltage is 8.7V and the current is 0.49A, wherein the temperature can reach 90 ℃; the temperature can reach 100 ℃ by electrifying for 8s under the conditions that the voltage is 17V and the current is 0.53A. Under the condition of proper voltage and current, the conductive heating layer provided with the electrodes can increase the temperature to 90-100 ℃ in a short time to reach the temperature required by the viscosity reduction of the thermal viscosity reduction adhesive layer.

In use, as shown in fig. 5, the thermal de-bonding protective film 100 is positioned between the battery 200 and the battery compartment 300 of the terminal body. The assembly process is substantially the same as that of a conventional double-sided adhesive tape, and the battery 200 is fixedly bonded in the battery compartment 300 by the thermal de-bonding adhesive layer 32, and one side of the thermal de-bonding adhesive layer 32 may face the battery 200 or the battery compartment 300. Referring to fig. 6A and 6B, when the battery 200 needs to be detached from the battery compartment 300 of the terminal body, power needs to be applied to both ends of the conductive heat generating layer 31 for a certain time, so that current uniformly passes through the entire conductive heat generating layer 31, and the conductive heat generating layer 31 gradually generates heat. When the temperature reaches 70-110 ℃, the thermal viscosity reducing adhesive layer 32 absorbs heat to reduce the viscosity, and the battery 200 can be easily taken out of the battery compartment 300. This assembly manner does not occupy too much space (thickness direction) of the battery compartment 300, so that the capacity of the battery 200 can be increased or the thickness of the terminal body can be reduced; meanwhile, in the process of disassembling the battery, the temperature is within a safe range, the battery 200 can be repeatedly utilized without being damaged, and the cost of reworking or disassembling is greatly reduced.

The thermal de-bonding protective film 100 shown in fig. 6B has a double-layer thermal de-bonding adhesive layer 32 structure, and the battery 200 and the battery compartment 300 are bonded to the thermal de-bonding adhesive layer 32. It is understood that the adhesive fixing effect of the two thermal adhesive reducing layers 32 can be achieved by replacing one of the thermal adhesive reducing layers 32 with the glue layer 50 formed by the common glue (i.e. having the structure of the thermal adhesive reducing protective film 100 shown in fig. 2 or fig. 4). Preferably, the electrodes 40 are disposed at two ends of the conductive heating layer 31, and the electrodes 40 are in contact with the conductive heating layer 31, so that current can uniformly pass through the entire conductive heating layer 31, thereby avoiding the phenomenon of non-uniform current at each position of the conductive heating layer 31.

To facilitate the operation, the present application provides the following three ways of applying power. Referring to fig. 7, the first method is to apply an external power, which is directly applied to the electrodes on both sides of the thermal de-bonding protective film when the battery is disassembled. Referring to fig. 8, the second is a way of connecting the control motherboard of the terminal. When the battery is assembled, the two ends of the electrode of the thermal viscosity reduction protective film extend out of the connector or the welding pad (welding spot), the two ends of the electrode are connected into the control mainboard of the terminal, and the control mainboard is in a closed state and an open state through a program control circuit during disassembly and can control voltage, a circuit and power-on time, so that the heating temperature of the battery can be accurately controlled, and the battery can be disassembled more quickly and safely. Referring to fig. 9, the third method is to connect the battery protection plate. When the battery equipment, the electrode both ends of thermal visbreaking protection film extend out connector or pad (solder joint), insert the battery protection shield with the both ends of electrode, also can come closed, the off-state of control circuit through control program during disassembling, also can control voltage, circuit, circular telegram time simultaneously to accurate control temperature that generates heat makes the battery dismantle more fast more safely.

Example 1

And applying power to the conductive heating layer of the thermal de-bonding protective film, wherein the power can be applied by any one of an external power supply, a control main board connected with a terminal and a battery protection board. The conductive heating layer gradually generates heat, and the heat-reducing adhesive absorbs the heat, so that the temperature rises. After the thermal viscosity reducing adhesive is heated at the temperature of 70 ℃ for 180s, the thermal viscosity reducing adhesive is reduced, can be separated from the battery or the battery compartment, and basically has no residual adhesive.

Example 2

And applying power to the conductive heating layer of the thermal de-bonding protective film, wherein the power can be applied by any one of an external power supply, a control main board connected with a terminal and a battery protection board. The conductive heating layer gradually generates heat, and the heat-reducing adhesive absorbs the heat, so that the temperature rises. After the thermal viscosity reducing adhesive is heated at the temperature of 90 ℃ for 10s, the adhesiveness of the thermal viscosity reducing adhesive basically disappears, and the thermal viscosity reducing adhesive can be easily separated from a battery or a battery bin without residual adhesive.

Example 3

And applying power to the conductive heating layer of the thermal de-bonding protective film, wherein the power can be applied by any one of an external power supply, a control main board connected with a terminal and a battery protection board. The conductive heating layer gradually generates heat, and the heat-reducing adhesive absorbs the heat, so that the temperature rises. After the thermal viscosity reducing adhesive is heated at the temperature of 110 ℃ for 5s, the adhesiveness of the thermal viscosity reducing adhesive basically disappears, the thermal viscosity reducing adhesive can be easily separated from a battery or a battery bin, no residual adhesive exists, but the temperature is slightly high, so that the long-term use of the battery is not facilitated.

The application provides a hot visbreaking protection film is applied to fixing between battery and the terminal main part, has thickness reduction, simple design, the operation is simplified and cost reduction's beneficial effect, has solved the contradiction that not only can reliably fix but also can conveniently dismantle between battery and the terminal main part.

Although the embodiments of the present application have been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the embodiments of the present application.