CN115230380A - Electronic pyrograph, preparation method thereof and wearable medical equipment - Google Patents
Electronic pyrograph, preparation method thereof and wearable medical equipment Download PDFInfo
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Abstract
The application provides an electronic pyrograph, a preparation method thereof and wearable medical equipment, wherein the electronic pyrograph comprises the following steps: the electronic pyrograph comprises a first release layer and a hot melt adhesive layer, wherein the hot melt adhesive layer comprises a first surface and a second surface deviated from the first surface, and is used for jointing the electronic pyrograph with a bearing object; the stretchable conductor layer and the elastic matrix layer are arranged between the first surface of the hot melt adhesive layer and the first release layer, wherein each stretchable conductor layer is clamped between the two elastic matrix layers, or when the number of the stretchable conductor layers is 1, the stretchable conductor layer is clamped between the hot melt adhesive layer and the elastic matrix layer, or the stretchable conductor layer close to the hot melt adhesive layer is clamped between the hot melt adhesive layer and the elastic matrix layer, and the other stretchable conductor layers are respectively clamped between the two elastic matrix layers. The electronic pyrograph of the present application can be transferred to a surface of a support such as a fabric through a hot melt adhesive layer.
Description
Technical Field
The application relates to the technical field of electronic manufacturing, in particular to an electronic pyrograph, a preparation method thereof and wearable medical equipment.
Background
Wearable equipment has huge application potential in the field of human health and medical treatment. Wearable equipment can be dressed at the body surface, carries out real-time, long-term monitoring to human each item physiology, biochemical index. In recent years, wearable devices are continuously developed towards flexibility, lightness, thinness and intellectualization, the form of the wearable device is not limited to the traditional forms of a bracelet, a watch, a wrist band and the like, but gradually fused with fabrics of clothes, caps, trousers, socks and the like, namely, an electronic circuit in the wearable device can be directly integrated on the fabrics.
The liquid metal has the conductive capability of metal and the flowing capability of liquid, and the circuit manufactured by the liquid metal has excellent flexibility and tensile property, so that the liquid metal is an ideal material for preparing wearable equipment. Liquid metal can be printed and printed by ink jet printing, screen printing, etc. on a flat surface, however, for non-flat complex surfaces such as fabrics, liquid metal is difficult to print directly. The liquid metal can be plated on the surface of the fabric through a grid plate, spraying and other modes, however, the liquid metal pattern prepared by the method has low precision and is difficult to package, and the liquid metal solution can cause the failure of a liquid metal circuit due to external influence, such as water washing, physical scratch and water vapor corrosion. The manufacturing of the circuit on the fabric can be realized by using the conductive fiber, different circuits can be woven on the fabric by using the fiber filled with liquid metal or the conductive silver fiber through different weaving methods, however, the circuit with higher precision is difficult to obtain on the surface of the fabric by the method for weaving the conductive fiber, and the method is only suitable for the preparation of the circuit with large line width; moreover, the process of weaving the conductive fiber is complex, needs professional mechanical equipment, and is not suitable for personalized customization.
In view of at least one of the above problems, the present application proposes a new electronic pyrograph, a method of manufacturing the same, and a wearable medical device.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. The summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
An aspect of an embodiment of the present application provides an electronic pyrograph, which includes:
the electronic pyrograph comprises a first release layer and a hot melt adhesive layer, wherein the hot melt adhesive layer comprises a first surface and a second surface deviated from the first surface, and is used for jointing the electronic pyrograph with a bearing object;
at least one stretchable conductor layer and at least one elastic matrix layer arranged between the first surface of the hot melt adhesive layer and the first release layer,
when the number of elastic matrix layers is greater than or equal to 2, each of said stretchable conductor layers is sandwiched between two of said elastic matrix layers, or,
when the number of layers of the elastic matrix layer is 1 and the number of layers of the stretchable conductor layer is 1, the stretchable conductor layer is sandwiched between the hot melt adhesive layer and the elastic matrix layer, or,
when the number of layers of the elastic matrix layers is greater than or equal to 2, and the number of layers of the stretchable conductor layers is greater than or equal to 2, one layer close to the hot melt adhesive layer is sandwiched between the hot melt adhesive layer and one layer of the elastic matrix layers, and the other stretchable conductor layers are sandwiched between the two elastic matrix layers respectively.
In one embodiment, the at least one stretchable conductor layer comprises a first stretchable conductor layer and a second stretchable conductor layer electrically connected to the first stretchable conductor layer, a via hole is provided in the elastic matrix layer between the first stretchable conductor layer and the second stretchable conductor layer, and the first stretchable conductor layer or the second stretchable conductor layer further fills the via hole.
In one embodiment, the adhesive tape further comprises a second release layer attached to the second surface of the hot melt adhesive layer.
In one embodiment, when the number of stretchable conductor layers is 1, the stretchable conductor layers include strain sensors or circuit layers, and when the number of stretchable conductor layers is greater than or equal to 2, the stretchable conductor layers of different layers each include a strain sensor or circuit layer, or a part of the stretchable conductor layers includes a strain sensor layer and another part of the stretchable conductor layers includes a circuit layer.
In one embodiment, each of the layers of hot melt adhesive film has a thickness of 5-200 microns;
each layer of the elastic substrate layer is 10-500 microns thick;
each of the stretchable conductor layers has an average thickness of 1-100 microns.
Another aspect of the present application further provides a method for preparing an electronic pyrograph, where the method includes:
providing a first release layer and a hot melt adhesive layer, wherein the hot melt adhesive layer comprises a first surface and a second surface deviated from the first surface, and the hot melt adhesive layer is used for jointing the electronic pyrograph and a receiver;
at least one stretchable conductor layer and at least one elastic matrix layer are formed between the first surface of the hot melt adhesive layer and the first release layer,
when the number of layers of elastic matrix layers is greater than or equal to 2, each of said stretchable conductor layers is sandwiched between two of said elastic matrix layers, or,
when the number of layers of the elastic matrix layer is 1 and the number of layers of the stretchable conductor layer is 1, the stretchable conductor layer is sandwiched between the hot melt adhesive layer and the elastic matrix layer, or,
when the number of layers of the elastic matrix layers is greater than or equal to 2, and the number of layers of the stretchable conductor layers is greater than or equal to 2, one layer of the stretchable conductor layer close to the hot melt adhesive layer is sandwiched between the hot melt adhesive layer and one layer of the elastic matrix layers, and the other stretchable conductor layers are sandwiched between the two layers of the elastic matrix layers respectively.
In one embodiment, forming at least one stretchable conductor layer and at least one elastic matrix layer between the first surface of the hot melt adhesive layer and the first release layer includes:
repeatedly and alternately performing the steps of forming a stretchable conductor layer and forming an elastic matrix layer at least once on the first surface of the hot melt adhesive layer, wherein the first release layer is attached to the elastic matrix layer formed at the last time; or
Forming an elastic substrate layer on the surface of the first release layer, and repeating the steps of forming a stretchable conductor layer and forming an elastic substrate layer on the elastic substrate layer alternately at least once, wherein the hot melt adhesive layer is attached to the elastic substrate layer formed at the last time; or
And repeating the steps of alternately forming an elastic matrix layer and a stretchable conductor layer on the surface of the first release layer at least once, wherein the hot melt adhesive layer is attached to the stretchable conductor layer formed at the last time.
In one embodiment, the forming at least one stretchable conductor layer and at least one elastic matrix layer between the first surface of the hot melt adhesive layer and the first release layer further comprises:
before forming the stretchable conductor layer of the subsequent layer, further comprising the step of forming a via hole on an elastic matrix layer intended to cover the stretchable conductor layer of the previous layer,
in forming a subsequent stretchable conductor layer, the subsequent stretchable conductor layer also fills the via to form an electrical connection with the previous stretchable conductor layer.
In one embodiment, forming at least one stretchable conductor layer and at least one elastic matrix layer between the first surface of the hot melt adhesive layer and the first release layer includes:
providing a first elastic matrix layer, bonding the first elastic matrix layer and the first release layer,
forming a first stretchable conductor layer on the surface of the first elastic matrix layer,
providing a second elastic matrix layer, overlaying said first stretchable conductor layer with said second elastic matrix layer,
covering the first surface of the hot melt adhesive layer with the second elastic matrix layer; or
Providing a second elastic matrix layer, forming the second elastic matrix layer on the first surface of the hot melt adhesive layer,
forming a first stretchable conductor layer on a surface of the second elastic matrix layer,
providing a first elastic matrix layer, bonding the first elastic matrix layer and the first release layer,
covering the surface of the first elastic substrate layer, which is far away from the first release layer, with the first stretchable conductor layer, and joining the first elastic substrate layer and the second elastic substrate layer.
Yet another aspect of the present application also provides a wearable medical device, comprising: the electronic pyrograph or the electronic pyrograph prepared by the preparation method.
According to the electronic pyrograph, the preparation method thereof and the wearable medical equipment, the electronic pyrograph comprises the stretchable conductor layer, the elastic matrix layer, the hot melt adhesive film layer and the release layer, the electronic pyrograph can be transferred to the surface of a bearing object such as a fabric through the hot melt adhesive layer and is tightly combined with the bearing object, and the wearable medical equipment with the electronic pyrograph has excellent flexibility and stretchability; the electronic pyrograph can easily transfer the stretchable conductor layer to the surface of a bearing object such as a fabric through the hot melt adhesive layer, is simple to operate, does not need professional equipment, and realizes personalized customization; the stretchable conductor layer in the electronic pyrograph has good encapsulation, is not oxidized after long-term use, and does not cause damage to a human body.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
In the drawings:
FIG. 1 shows an exploded schematic view of an electronic pyrograph according to an embodiment of the present application;
FIG. 2 shows a schematic cross-sectional view of an electronic pyrograph according to an embodiment of the present application;
FIG. 3 shows an exploded schematic view of an electronic pyrograph according to another embodiment of the present application;
FIG. 4 shows a schematic cross-sectional view of an electronic pyrograph according to another embodiment of the present application;
fig. 5 shows a flow chart of a method of producing an electronic pyrograph according to an embodiment of the present application.
Reference numbers:
a first stretchable conductor layer 3; a first elastic matrix layer 4; a second elastic matrix layer 2; a hot melt adhesive layer 1; a first release layer 5; a second stretchable conductor layer 6; a third elastic matrix layer 7; and a through hole 8.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, exemplary embodiments according to the present application will be described in detail below with reference to the accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the application described in the application without inventive step, shall fall within the scope of protection of the application.
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. It will be apparent, however, to one skilled in the art, that the present application may be practiced without one or more of these specific details. In other instances, well-known features of the art have not been described in order to avoid obscuring the present application.
It is to be understood that the present application is capable of implementation in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.
In order to provide a thorough understanding of the present application, a detailed structure will be presented in the following description in order to explain the technical solutions presented in the present application. Alternative embodiments of the present application are described in detail below, however, the present application may have other implementations in addition to these detailed descriptions.
In the following, an electronic pyrograph according to an embodiment of the present application is first described with reference to fig. 1 to 4, wherein fig. 1 shows an exploded schematic view of an electronic pyrograph according to an embodiment of the present application; FIG. 2 shows a schematic cross-sectional view of an electronic pyrograph according to an embodiment of the present application; FIG. 3 shows an exploded schematic view of an electronic pyrograph according to another embodiment of the present application; fig. 4 shows a schematic cross-sectional view of an electronic pyrograph according to another embodiment of the present application.
As an example, the present application provides an electronic pyrograph, comprising: the electronic pyrograph comprises a first release layer and a hot melt adhesive layer, wherein the hot melt adhesive layer comprises a first surface and a second surface deviated from the first surface, and is used for jointing the electronic pyrograph with a bearing object; at least one tensile conductor layer of one deck and at least one deck elasticity matrix layer set up in the first surface of hot melt adhesive layer with it is first from between the type layer, when the number of piles on elasticity matrix layer is more than or equal to 2 layers, every layer the clamp of tensile conductor layer is two-layerly between the elasticity matrix layer, or, work as the number of piles on elasticity matrix layer is 1 layer, the number of piles on tensile conductor layer is when 1 layer, the conductive layer of can stretching presss from both sides hot melt adhesive layer with between the elasticity matrix layer, perhaps, when the number of piles on elasticity matrix layer is more than or equal to 2 layers, just the number of piles on tensile conductor layer is more than or equal to 2 layers, is close to the one deck on hot melt adhesive layer the conductor layer presss from both sides can stretch hot melt adhesive layer and one deck between the elasticity matrix layer, other the conductive layer can stretch and press from both sides respectively two-layerly between the elasticity matrix layer. Through with the conductor layer clamp of can stretching between adjacent two-layer elasticity matrix layer or press from both sides between hot melt adhesive layer and elasticity matrix layer to the realization is to the encapsulation of the conductor layer of can stretching, uses for a long time and does not oxidize, also does not cause the injury to the human body yet. The electronic pyrograph can be transferred to the surface of a support such as a fabric through the hot melt adhesive layer and is tightly combined with the support, and the wearable medical device with the electronic pyrograph has excellent flexibility and stretchability.
The number of layers of the stretchable conductor layer included in the electronic pyrograph can be reasonably set according to actual needs, for example, the number of layers can be 1, 2, 3 or more, adjacent stretchable conductor layers can be separated by at least one elastic matrix layer, wherein the elastic matrix layer may not be arranged between the hot melt adhesive layer and the stretchable conductor layer closest to the hot melt adhesive layer, and the stretchable conductor layer can be arranged on the hot melt adhesive layer.
In some embodiments, the electronic pyrograph of the present application further includes a second release layer (not shown) attached to the second surface of the hot melt adhesive layer. The second plays the effect of supporting and protecting the electron pyrograph before the electron pyrograph rendition accepts the thing, after the electron pyrograph shifts to accepting the thing, can easily separate with other parts in the electron pyrograph from the type layer, and other parts in the electron pyrograph can not glue on from the type layer.
Optionally, when the number of stretchable conductor layers is 1, the stretchable conductor layers include strain sensors or circuit layers, and when the number of stretchable conductor layers is greater than or equal to 2, the stretchable conductor layers of different layers each include a strain sensor or a circuit layer, or a part of the stretchable conductor layers includes a strain sensor layer and another part of the stretchable conductor layers includes a circuit layer. Optionally, the stretchable conductor layers of adjacent layers are electrically connected to each other. The types of strain sensors of different layers may be different or the same, and the types of circuit layers of different layers may be different or the same.
It is worth mentioning that the circuit layer may further comprise a heater, so as to generate heat when the circuit layer is energized, and to generate heat so as to perform a thermal treatment of the wearing portion when it is applied to the wearable medical device.
In some embodiments, the circuit layer may also include a PCB circuit board, with which electrical connections are made to some components, such as transistors, diodes, capacitors, inductors, resistors, and the like.
In some embodiments, as shown in fig. 1 and 2, the electronic pyrograph may include a first stretchable conductor layer 3, a first elastic matrix layer 4, a second elastic matrix layer 2, a hot melt adhesive layer 1, and a first release layer 5, wherein the second elastic matrix layer 2 covers a first surface of the hot melt adhesive layer 1, the first stretchable conductor layer 3 is formed on a surface of the second elastic matrix layer 2, the first elastic matrix layer 4 covers the first stretchable conductor layer 3, and the first release layer 5 covers the first elastic matrix layer 4, and the release layer plays a role of supporting and protecting the electronic pyrograph before the electronic pyrograph is transferred to the receiving object.
It should be noted that the second elastic matrix layer 2 can be selectively disposed, in some embodiments, the electronic pyrograph may not be disposed on the second elastic matrix layer 2, and the first stretchable conductor layer 3 is disposed on the hot melt adhesive layer 1, and other configurations may not be changed.
In other embodiments, as shown in fig. 3 and 4, the at least one stretchable conductor layer includes a first stretchable conductor layer 3 and a second stretchable conductor layer 6 electrically connected to the first stretchable conductor layer 3, through holes 8 are disposed in an elastic matrix layer (e.g., the first elastic matrix layer 4) between the first stretchable conductor layer 3 and the second stretchable conductor layer 6, the location and number of the through holes 8 can be set according to practical requirements, and the first stretchable conductor layer 3 or the second stretchable conductor layer 6 also fills the through holes 8 so as to electrically connect the first stretchable conductor layer 3 and the second stretchable conductor layer 6. For example, as shown in fig. 3 and 4, the second elastic substrate layer 2 covers the first surface of the hot melt adhesive layer 1, the first stretchable conductor layer 3 is formed on the surface of the second elastic substrate layer 2, the first elastic substrate layer 4 covers the first stretchable conductor layer 3, the second stretchable conductor layer 6 is formed on the first elastic substrate layer 4, the second stretchable conductor layer 6 is covered by the third elastic substrate layer 7, wherein the third elastic substrate layer 7 is provided with a through hole 8, a portion of the second stretchable conductor layer 6 may further fill the through hole 8, thereby forming an electrical connection with the first stretchable conductor layer 3 through the stretchable conductor layer filled in the through hole 8, and the first release layer 5 covers the third elastic substrate layer 7.
In the application, the stretchable conductor layer is made of liquid metal, the liquid metal has both the conductive capacity of metal and the flowing capacity of liquid, and the circuit made of the liquid metal has excellent flexibility and stretching performance, so that the stretchable conductor layer is an ideal material for preparing wearable medical equipment. The liquid metal comprises at least one of the following metals: simple substance of gallium, gallium-indium alloy, gallium-zinc alloy, gallium-tin alloy, gallium-indium-zinc alloy, bismuth-tin alloy and bismuth-tin-lead-indium alloy; in some embodiments, the stretchable conductor layer may further comprise at least one of the following materials: stretchable nanomaterials such as carbon nanotubes, silver nanowires, silver nanorods. The stretchable conductor layer has an average thickness of 1-100 microns or other suitable thickness. The stretchable liquid metal circuit layer is formed by patterning liquid metal on the elastic matrix layer in a screen printing mode, an ink-jet printing mode, a character leaking plate mode, a spraying mode, an evaporation mode, a magnetron sputtering mode and the like.
Optionally, when the stretchable conductor layer comprises a strain sensor, the strain sensor may be stretched with the movement of the limb or joint to which it is attached to cause a change in resistance, which in turn causes a change in current in the circuit, thereby serving to monitor the movement.
Alternatively, the stretchable conductor layer may be a conductor layer formed by patterning a liquid metal on the elastic matrix layer by screen printing, inkjet printing, stencil printing, spraying, evaporation, magnetron sputtering, or the like.
In some embodiments, the elastic matrix layer is both a base for the stretchable conductor layer and an encapsulation for the stretchable conductor layer, and the number of layers of the elastic matrix layer may be one more than the number of layers of the stretchable conductor, thereby sandwiching the stretchable conductor layer between the two elastic matrix layers. Optionally, the elastic substrate layer includes any one of or a combination of at least two of a silicone rubber-based elastic material, a polystyrene-based elastic material, a polyolefin-based elastic material, or a polyurethane elastic material, and a latex-based elastic material. Optionally, the thickness of the elastic substrate layer is 10-500 microns or other suitable thickness, wherein different thicknesses or substantially the same thickness may be used for different layers of the elastic substrate layer, different materials may be used for different layers of the elastic substrate layer, or the same material may be used.
In this application, the hot melt adhesive film layer is used for bonding with the accepts such as fabric, and under the effect of hot pressing, the hot melt adhesive film layer bonds with the accepts such as fabric, combines closely, even can not drop under various deformation. The hot melt adhesive film layer comprises any one or the combination of at least two of a hot melt polyurethane material, a polyamide material, an ethylene-vinyl acetate copolymer material, a polyether sulfone material, an ethylene acrylic acid copolymer material and the like. Optionally, the thickness of the hot melt adhesive film layer is 5-200 microns or other suitable thickness.
In this application, from the type layer play support and protection electron pyrograph's effect before the electron pyrograph rendition accepts the thing, after the electron pyrograph shifted to accepting the thing, can easily separate with other parts in the electron pyrograph from the type layer, and other parts in the electron pyrograph can not glue on from the type layer. Particularly, under the condition that the stretchable conductor layer in the electronic pyrograph is very thin, if no proper supporting protective layer is provided, the circuit part in the electronic pyrograph can be wrinkled into a group due to static electricity or other effects and is difficult to unfold, or can be adhered to the supporting protective film to damage the circuit part in the electronic pyrograph; optionally, the release layer may be a release paper layer, and the release paper layer includes a silicone film, silicone oil paper, glassine, laminating paper, and the like. Optionally, the thickness of the release paper layer is 10-500 micrometers or other suitable thicknesses, and the thickness can ensure the supporting capability and certain bending capability of the electronic pyrograph within the range, so that the release paper layer can be suitable for the transfer printing of different shapes of supports.
Further, the present application also provides some exemplary methods for preparing the foregoing electronic pyrograph, which will be described below with reference to the accompanying drawings, and the technical features of the present application may be combined with each other without conflict.
As an example, as shown in fig. 5, a method for preparing an electronic pyrograph according to the present application includes the following steps S510 and S520:
step S510, providing a first release layer and a hot melt adhesive layer, wherein the hot melt adhesive layer comprises a first surface and a second surface deviated from the first surface, and the hot melt adhesive layer is used for jointing the electronic pyrograph and a bearing object;
step S520, forming at least one stretchable conductor layer and at least one elastic matrix layer between the first surface of the hot melt adhesive layer and the first release layer, wherein,
when the number of layers of elastic matrix layers is greater than or equal to 2, each of said stretchable conductor layers is sandwiched between two of said elastic matrix layers, or,
when the number of layers of the elastic matrix layer is 1 and the number of layers of the stretchable conductor layer is 1, the stretchable conductor layer is sandwiched between the hot melt adhesive layer and the elastic matrix layer, or,
when the number of layers of the elastic matrix layers is greater than or equal to 2, and the number of layers of the stretchable conductor layers is greater than or equal to 2, one layer of the stretchable conductor layer close to the hot melt adhesive layer is sandwiched between the hot melt adhesive layer and one layer of the elastic matrix layers, and the other stretchable conductor layers are sandwiched between the two layers of the elastic matrix layers respectively.
It should be noted that, in the present application, step S510 may also be performed in step 520, and the method for preparing the electronic pyrograph according to some embodiments of the present application will be described below with reference to fig. 1 and fig. 2, but it should be understood that these methods are only examples, and other methods for preparing the electronic pyrograph capable of obtaining the foregoing embodiments of the present application may also be applied to the present application.
In step S520, the steps of forming a stretchable conductor layer and forming an elastic matrix layer may be repeatedly and alternately performed at least once on the first surface of the hot melt adhesive layer, wherein the first release layer is attached to the elastic matrix layer formed last time; or forming an elastic substrate layer on the first surface of the hot melt adhesive layer, and repeating the steps of forming a stretchable conductor layer and forming an elastic substrate layer alternately at least once on the elastic substrate layer, wherein the last formed elastic substrate layer is coated with the first release layer, optionally, the first release layer and the elastic substrate layer can be combined before the last formed elastic substrate layer contacts with the stretchable conductor layer to be covered, and then the stretchable conductor layer is covered on the side of the last formed elastic substrate layer opposite to the first release layer, or the first release layer and the elastic substrate layer can be combined after the last formed elastic substrate layer covers the stretchable conductor layer.
In other embodiments, step S520 may also be implemented by forming an elastic matrix layer on the surface of the first release layer, and repeating the steps of forming a stretchable conductor layer and forming an elastic matrix layer on the elastic matrix layer at least once, wherein the hot melt adhesive layer is attached to the elastic matrix layer formed last time; or repeating the steps of alternately forming an elastic matrix layer and forming a stretchable conductor layer on the surface of the first release layer at least once, wherein the hot melt adhesive layer is attached to the stretchable conductor layer formed at the last time.
In some embodiments, in order to form an electronic pyrograph including one stretchable conductor layer and two elastic matrix layers, at least one stretchable conductor layer and at least one elastic matrix layer are formed between the first surface of the hot melt adhesive layer 1 and the first release layer 5, as shown in fig. 1 and 2, and include steps A1 to A4:
in step A1, providing a first elastic matrix layer 4, bonding the first elastic matrix layer 4 and the first release layer 5, and bonding the first elastic matrix layer 4 and the first release layer 5 by any suitable means, for example, selecting an elastic material with a suitable thickness as the first elastic matrix layer from candidate materials of the elastic matrix layers, and bonding the first elastic matrix layer 4 and the release paper layer by pressing, or any one or a combination of at least two of hot pressing, cold pressing, dissolving/melting spin coating, dissolving/melting blade coating, or dissolving/melting casting.
In step A2, the first stretchable conductor layer 3 is formed on the surface of the first elastic matrix layer 4, for example, by patterning a liquid metal on the elastic matrix layer by screen printing, inkjet printing, stencil printing, spraying, evaporation, magnetron sputtering, or the like to obtain the first stretchable conductor layer 3.
In step A3, a second elastic substrate layer 2 is provided, the second elastic substrate layer 2 is laid over the first stretchable conductor layer 3 and joined to the first elastic substrate layer 4 such that the first stretchable conductor layer 3 is sandwiched between the second elastic substrate layer 2 and the first elastic substrate layer 4.
In step A4, the first surface of the hot melt adhesive layer 1 is covered with the second elastic matrix layer 2, and the hot melt adhesive layer 1 and the second elastic matrix layer 2 are bonded.
In other embodiments, at least one stretchable conductor layer and at least one elastic matrix layer are formed between the first surface of the hot melt adhesive layer 1 and the first release layer 5, including steps B1 to B4:
in step B1, a second elastic substrate layer 2 is provided, and the second elastic substrate layer 2 is formed on the first surface of the hot melt adhesive layer 1, that is, the first surface of the hot melt adhesive layer 1 and the second elastic substrate layer 2 are bonded,
in step B2, a first stretchable conductor layer 3 is formed on the surface of the second elastic matrix layer 2,
in step B3, a first elastic matrix layer 4 is provided, the first elastic matrix layer 4 and the first release layer 5 are bonded,
in step B4, the surface of the first elastic matrix layer 4 facing away from the first release layer 5 is covered with the first stretchable conductor layer 3, and the first elastic matrix layer 4 and the second elastic matrix layer 2 are joined.
In other embodiments, the film layers may be sequentially prepared in the order from the hot melt adhesive layer 1 to the first release layer 5, or the film layers may be sequentially prepared in the order from the first release layer 5 to the hot melt adhesive layer 1.
In some embodiments, when there are two or more stretchable conductor layers, the different stretchable conductor layers may also be electrically connected to each other, for example, before forming the stretchable conductor layer of the next layer, a step of forming a via hole on the elastic matrix layer intended to cover the stretchable conductor layer of the previous layer is further included, and when forming the stretchable conductor layer of the next layer, the stretchable conductor layer of the next layer also fills the via hole to form an electrical connection with the stretchable conductor layer of the previous layer. It is worth mentioning that the stretchable conductor layer of the next layer and the stretchable conductor layer of the previous layer are defined according to the formation sequence, wherein the stretchable conductor layer of the next layer is formed after the stretchable conductor layer of the previous layer is formed.
Taking the case of having two stretchable conductor layers as an example, as shown in fig. 3 and 4, the forming at least one stretchable conductor layer and at least two elastic matrix layers between the first surface of the hot melt adhesive layer 1 and the first release layer 5 includes the following steps C1 to C6:
in step C1, providing a first elastic matrix layer 4, and joining the first elastic matrix layer 4 and the first release layer 5;
in step C2, forming the first stretchable conductor layer 3 on the surface of the first elastic matrix layer 4;
in step C3, providing a second elastic substrate layer 2, overlaying said second elastic substrate layer 2 on said first stretchable conductor layer 3 and joining said first elastic substrate layer 4;
in step C4, forming a second stretchable conductor layer 6 on said second elastic matrix layer 2;
in step C5, providing a third elastic substrate layer 7, overlaying said third elastic substrate layer 7 on said second stretchable conductor layer 6 and joining said second elastic substrate layer 2;
in step C6, the first surface of the hot melt adhesive layer 1 is covered with the third elastic matrix layer 7.
In some embodiments, before the step of forming the second stretchable conductor layer 6 on the second elastic matrix layer 2, further comprising: forming a through hole 8 on the second elastic matrix layer 2; wherein, when the second stretchable conductor layer 6 is formed on the second elastic matrix layer 2, the second stretchable conductor layer 6 also fills the through hole 8 to form an electrical connection with the first stretchable conductor layer 3. The second layer of the elastic matrix layer may be perforated by a cutting machine, such as a laser cutter, a carving machine, or the like, to prepare the longitudinal connecting through-holes 8 between the different stretchable circuit layers.
It should be noted that the order of each of steps A1 to A4, steps B1 to B4, and steps C1 to C6 may be replaced, for example, the order of step A2 and step A3 may be reversed. The electronic pyrograph comprising at least two stretchable conductor layers can be obtained by repeatedly performing the step A2 and the step A3.
In some embodiments, the following steps may also be included: the second release layer is used to be combined with the hot melt adhesive layer 1 to protect the hot melt adhesive layer 1 before the electronic pyrograph is used.
In the foregoing steps, the two elastic matrix layers or the bonding mode between the elastic matrix layers and the bonding mode between the hot melt adhesive layers include any one or a combination of at least two of hot pressing, cold pressing, dissolving/melting spin coating, dissolving/melting blade coating or dissolving/melting casting.
The electronic pyrograph of this application can also contact the one side of hot melt adhesive layer with accepting the thing after the preparation is accomplished, uses the method of hot pressing to be in the same place electronic pyrograph and accepting the thing pressfitting. After the hot pressing is finished, the release layer of the electronic pyrograph is torn off, and the stretchable conductor layer in the electronic pyrograph can be transferred to the bearing object. Optionally, the receiving object comprises any one of various fabrics, silicone rubber-based elastic materials, polystyrene-based elastic materials, polyolefin-based elastic materials or polyurethane elastic materials, latex-based elastic materials, or a combination of at least two of them.
In one particular embodiment, an exemplary method of making an electronic pyrograph includes: providing, for example, a hot melt polyurethane film as the first elastic substrate layer 4, wherein the thickness of the first elastic substrate layer 4 is 10-500 microns, for example, any one of the thicknesses of 40 microns, 50 microns, 60 microns, 80 microns, 100 microns, etc., providing the first release layer 5, wherein the thickness of the first release layer 5 is 10-500 microns, for example, any one of the thicknesses of 50 microns, 80 microns, 100 microns, 120 microns, 150 microns, etc., the first release layer 5 may be silicone oil paper, bonding one side of the elastic substrate layer with the silicone oil coating side of the silicone oil paper by, for example, hot pressing, optionally, the hot pressing temperature may be any suitable temperature, for example, the hot pressing temperature is 100 to 150 deg.C, for example, the hot pressing temperature is any suitable temperature of 100 deg.C, 110 deg.C, 120 deg.C, 130 deg.C, 140 deg.C, 150 deg.C, the hot pressing time may be any suitable time, for example, the hot pressing time is 10 seconds to 60 seconds, for example, any time of 10 seconds, 20 seconds, 30 seconds, 40 seconds, 50 seconds, 60 seconds, the hot pressing pressure may be any suitable pressure, for example, the hot pressing pressure is 1 to 6 kg/cm, for example, the hot pressing pressure may be any suitable pressure of 1 kg/cm, 2 kg/cm, 3 kg/cm, 4 kg/cm, 5 kg/cm, 6 kg/cm. Printing a liquid metal on the first elastic matrix layer 4 by a method such as screen printing to form a stretchable conductor layer; providing a second elastic substrate layer such as a hot-melt polyurethane film, optionally, the thickness of the second elastic substrate layer 2 is 10-500 microns, for example, any one of the thicknesses of 40 microns, 50 microns, 60 microns, 80 microns, 100 microns, etc., covering the second elastic substrate layer on the stretchable conductor layer (for example, a liquid metal stretchable circuit layer), combining with the first elastic substrate layer 4 by hot pressing, and sandwiching the stretchable conductor layer between the two elastic substrate layers, optionally, the hot pressing temperature may be any suitable temperature, and then, selecting thermoplastic polyurethane as the hot-melt adhesive layer 1, optionally, combining the hot-melt adhesive layer 1 with the second elastic substrate layer 2 by hot pressing, so as to obtain the liquid metal electronic pyrograph. The hot melt adhesive layer is contacted with the receiving object, the hot melt adhesive layer can be bonded with the receiving object in a hot pressing mode, the hot pressing temperature is 140 ℃, the hot pressing time is 20 seconds, the hot pressing pressure is 2 kg/square centimeter, and the liquid metal stretchable circuit can be obtained on the receiving object after the release paper layer 1 is removed.
In another embodiment, for example, a hot-melt polyurethane film is selected as the first elastic substrate layer 4, the thickness of the first elastic substrate layer 4 is 10 to 500 micrometers, for example, any one of the thicknesses of 40 micrometers, 50 micrometers, 60 micrometers, 80 micrometers, 100 micrometers, etc., the first release layer 5 is provided, wherein the thickness of the first release layer 5 is 10 to 500 micrometers, for example, any one of the thicknesses of 50 micrometers, 80 micrometers, 100 micrometers, 120 micrometers, 150 micrometers, etc., the first release layer 5 may be silicone oil paper, and one side of the first elastic substrate layer 4 is bonded with one side of the silicone oil coating of the silicone oil paper by means of hot pressing. Printing a liquid metal on the first elastic matrix layer 4 by a screen printing method to form a first stretchable conductor layer 3 (e.g., a liquid metal stretchable circuit layer); selecting, for example, a hot-melt polyurethane film as the second elastic substrate layer 2, cutting through holes 8 on the second elastic substrate layer 2 using, for example, a laser cutting machine, covering the second elastic substrate layer 2 on the first stretchable conductor layer 3, and combining with the first elastic substrate layer 4 by means of hot pressing; printing a liquid metal on the second elastic matrix layer 2 by a screen printing method to form a second stretchable conductor layer 6 (e.g., a liquid metal stretchable circuit layer), and filling the liquid metal with a syringe at the position of the through hole 8 so that the second stretchable conductor layer 6 is connected with the first stretchable conductor layer 3; selecting, for example, a hot-melt polyurethane film as the third elastic substrate layer 7, covering the third elastic substrate layer 7 on the second stretchable conductor layer 6, and combining with the second elastic substrate layer 2 by means of hot pressing; for example, thermoplastic polyurethane is selected as the hot melt adhesive layer 1, and the liquid metal electronic pyrograph can be obtained by combining the hot melt adhesive layer 1 with the third elastic matrix layer 7 through a hot pressing method. The hot melt adhesive layer is contacted with the receiving object, the hot melt adhesive layer can be bonded with the receiving object in a hot pressing mode, and the liquid metal stretchable circuit can be obtained on the receiving object after the first release layer 5 is removed.
In the present application, the parameters of the hot pressing can be set according to practical requirements, for example, the hot pressing temperature is 100-150 ℃, for example, the hot pressing temperature is any suitable temperature of 100 ℃, 110 ℃, 120 ℃, 125 ℃, 130 ℃, 135 ℃, 140 ℃, 150 ℃, the time of the hot pressing can be any suitable time, for example, the time of the hot pressing is 10 seconds-60 seconds, for example, any time of 10 seconds, 15 seconds, 20 seconds, 30 seconds, 40 seconds, 50 seconds, 60 seconds, the pressure of the hot pressing can be any suitable pressure, for example, the pressure of the hot pressing is 1-6 kg/cm, for example, the pressure of the hot pressing can be any suitable pressure of 1 kg/cm, 2 kg/cm, 3 kg/cm, 4 kg/cm, 5 kg/cm, 6 kg/cm.
In summary, the electronic pyrograph and the preparation method thereof have the following beneficial effects:
(1) The application discloses electron pyrograph, it combines together liquid metal circuit and heat-transfer seal pyrograph, through contacting the hot melt adhesive layer and accepting the thing, can make hot melt adhesive layer and accepting the thing for example the fabric bonding through the mode of hot pressing, detach first from the type layer after, accomplish the pyrograph process, can obtain the circuit of stretching of liquid metal on accepting the thing, it has easy operation swiftly, the pattern precision is high, the customization degree is high advantage.
(2) After the electronic pyrograph is processed by a hot pressing method, a stretchable conductor layer such as a liquid metal circuit in the electronic pyrograph can be transferred to the surface of a bearing object, and the circuit transferred to the surface of the bearing object has excellent flexibility and stretchability, is good in conformality and can deform along with the bearing object.
(3) Due to the existence of the hot melt adhesive layer, the flexible stretchable conductor layer can be tightly bonded with the bearing object, can not fall off under various deformations, and can resist washing.
(4) The liquid metal stretchable circuit in the electronic pyrograph is clamped between two compact elastic matrix layers, is well protected by the elastic matrix layers, is water-resistant and oxidation-resistant, and does not decline in electrical performance after being used for a long time.
Further, the application also provides wearable medical equipment, and the wearable medical equipment comprises the electronic pyrograph or the electronic pyrograph prepared by the preparation method.
For example, the wearable medical device may include a carrier such as fabric or other suitable material, the fabric may be configured to match the size of the body part that needs to be worn, e.g., the wearable medical device may be worn at the knee of a human body, or at the joint of a finger, etc., in order to monitor the movement of the body part. And the electronic pyrograph can be transferred to the surface of a carrier such as fabric through the hot melt adhesive layer and is tightly combined with the carrier, and the wearable medical device with the electronic pyrograph has excellent flexibility and stretchability.
The advantages of the fusion of the wearable medical device with the fabric are as follows: firstly, as the fabric covers most of the body surface, the electronic circuit in the wearable device is fused with the fabric, so that the detection range of the wearable device on the body surface can be greatly enlarged; secondly, the fabric has the characteristics of softness, close fitting and the like, an electronic circuit in the wearable medical equipment is fused with the fabric to enable the wearable medical equipment to be close fitting to the body surface, a sensor in the wearable medical equipment can be tightly attached to the body surface in the detection process, and the wearable medical equipment has a stable measurement interface, so that the measurement noise is greatly reduced; thirdly, the electronic circuit in the wearable equipment is fused with the fabric, so that the comfort of the wearable equipment can be greatly improved, and a user has little foreign body sensation in the using process and is comfortable and breathable. Therefore, the electronic circuit in the wearable medical equipment and the fabric are fused, so that the wearable medical equipment has huge application prospects in the fields of medical health and human-computer interaction.
It is worth mentioning that the wearable medical device may have other components besides the electronic pyrograph and the carrier, such as a battery, etc., and the battery may be electrically connected to the stretchable conductor layer in the electronic pyrograph, so as to provide the stretchable conductor layer with an operating voltage, etc.
Although the example embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above-described example embodiments are merely illustrative and are not intended to limit the scope of the present application thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as claimed in the appended claims.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the description of exemplary embodiments of the present application, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the application and aiding in the understanding of one or more of the various inventive aspects. However, the method of the present application should not be construed to reflect the intent: this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.
It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
The above description is only for the specific embodiments of the present application or the description thereof, and the protection scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope disclosed in the present application, and shall be covered by the protection scope of the present application. The protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. An electronic pyrograph, characterized in that the electronic pyrograph comprises:
the electronic pyrograph comprises a first release layer and a hot melt adhesive layer, wherein the hot melt adhesive layer comprises a first surface and a second surface deviated from the first surface, and is used for jointing the electronic pyrograph with a bearing object;
at least one stretchable conductor layer and at least one elastic matrix layer arranged between the first surface of the hot melt adhesive layer and the first release layer,
when the number of layers of elastic matrix layers is greater than or equal to 2, each of said stretchable conductor layers is sandwiched between two of said elastic matrix layers, or,
when the number of layers of the elastic matrix layer is 1 and the number of layers of the stretchable conductor layer is 1, the stretchable conductor layer is sandwiched between the hot melt adhesive layer and the elastic matrix layer, or,
when the number of layers of the elastic matrix layers is greater than or equal to 2 and the number of layers of the stretchable conductor layers is greater than or equal to 2, one layer close to the hot melt adhesive layer is sandwiched between the hot melt adhesive layer and one layer of the elastic matrix layers, and the other stretchable conductor layers are sandwiched between the two elastic matrix layers respectively.
2. The electronic pyrograph of claim 1, wherein the at least one stretchable conductor layer includes a first stretchable conductor layer and a second stretchable conductor layer electrically connected to the first stretchable conductor layer, a via hole is provided in the elastic matrix layer between the first stretchable conductor layer and the second stretchable conductor layer, and the first stretchable conductor layer or the second stretchable conductor layer further fills the via hole.
3. The electronic pyrograph of claim 1, further comprising a second release layer attached to the second surface of the hot melt adhesive layer.
4. An electronic pyrograph according to claim 1, wherein the stretchable conductor layer includes a strain sensor or a circuit layer when the number of layers of the stretchable conductor layer is 1, the stretchable conductor layers of different layers each include a strain sensor or a circuit layer when the number of layers of the stretchable conductor layer is 2 or more, or the stretchable conductor layers of a part of the layers include a strain sensor layer and the stretchable conductor layers of another part of the layers include a circuit layer.
5. An electronic pyrograph as defined in claim 1, wherein each of said hot melt adhesive film layers has a thickness of 5 to 200 μm;
each layer of the elastic substrate layer is 10-500 microns thick;
each of the stretchable conductor layers has an average thickness of 1-100 microns.
6. A preparation method of an electronic pyrograph is characterized by comprising the following steps:
providing a first release layer and a hot melt adhesive layer, wherein the hot melt adhesive layer comprises a first surface and a second surface deviated from the first surface, and the hot melt adhesive layer is used for jointing the electronic pyrograph and a bearing object;
at least one stretchable conductor layer and at least one elastic matrix layer are formed between the first surface of the hot melt adhesive layer and the first release layer,
when the number of layers of elastic matrix layers is greater than or equal to 2, each of said stretchable conductor layers is sandwiched between two of said elastic matrix layers, or,
when the number of layers of the elastic matrix layer is 1 and the number of layers of the stretchable conductor layer is 1, the stretchable conductor layer is sandwiched between the hot melt adhesive layer and the elastic matrix layer, or,
when the number of layers of the elastic matrix layers is greater than or equal to 2 and the number of layers of the stretchable conductor layers is greater than or equal to 2, one stretchable conductor layer close to the hot melt adhesive layer is sandwiched between the hot melt adhesive layer and one elastic matrix layer, and the other stretchable conductor layers are sandwiched between the two elastic matrix layers respectively.
7. The method of claim 6, wherein forming at least one stretchable conductor layer and at least one elastic matrix layer between the first surface of the hot melt adhesive layer and the first release layer comprises:
repeatedly and alternately performing the steps of forming a stretchable conductor layer and forming an elastic matrix layer at least once on the first surface of the hot melt adhesive layer, wherein the first release layer is attached to the elastic matrix layer formed at the last time; or
Forming an elastic substrate layer on the surface of the first release layer, and repeating the steps of forming a stretchable conductor layer and forming an elastic substrate layer on the elastic substrate layer alternately at least once, wherein the hot melt adhesive layer is attached to the elastic substrate layer formed at the last time; or
And repeating the steps of alternately forming an elastic matrix layer and a stretchable conductor layer on the surface of the first release layer at least once, wherein the hot melt adhesive layer is attached to the stretchable conductor layer formed at the last time.
8. The method of claim 7, wherein the forming at least one stretchable conductor layer and at least one elastic matrix layer between the first surface of the hot melt adhesive layer and the first release layer further comprises:
before forming the stretchable conductor layer of the subsequent layer, further comprising the step of forming a via hole on an elastic matrix layer intended to cover the stretchable conductor layer of the previous layer,
in forming a subsequent stretchable conductor layer, the subsequent stretchable conductor layer also fills the via to form an electrical connection with the previous stretchable conductor layer.
9. The method of claim 6, wherein forming at least one stretchable conductor layer and at least one elastic matrix layer between the first surface of the hot melt adhesive layer and the first release layer comprises:
providing a first elastic matrix layer, bonding the first elastic matrix layer and the first release layer,
forming a first stretchable conductor layer on the surface of the first elastic matrix layer,
providing a second elastic matrix layer, overlaying said first stretchable conductor layer with said second elastic matrix layer,
covering the first surface of the hot melt adhesive layer with the second elastic matrix layer; or
Providing a second elastic matrix layer, forming the second elastic matrix layer on the first surface of the hot melt adhesive layer,
forming a first stretchable conductor layer on the surface of the second elastic matrix layer,
providing a first elastic matrix layer, bonding the first elastic matrix layer and the first release layer,
covering the surface of the first elastic substrate layer, which is far away from the first release layer, with the first stretchable conductor layer, and joining the first elastic substrate layer and the second elastic substrate layer.
10. A wearable medical device, comprising: the electronic pyrograph according to any one of claims 1 to 5, or the electronic pyrograph produced by the production method according to any one of claims 6 to 9.
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| CN112480837A (en) * | 2020-12-08 | 2021-03-12 | 南方科技大学 | Electronic tattoo and preparation method and application thereof |
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| CN117295255A (en) * | 2023-09-28 | 2023-12-26 | 电子科技大学 | Method for combining stretchable circuit board and flexible circuit board |
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