CN115230380B

CN115230380B - Electronic pyrograph, preparation method thereof and wearable medical equipment

Info

Publication number: CN115230380B
Application number: CN202210871412.7A
Authority: CN
Inventors: 李虹
Original assignee: Beijing Ruozhi Technology Co ltd
Current assignee: Beijing Ruozhi Technology Co ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2024-07-19
Anticipated expiration: 2042-07-22
Also published as: CN115230380A

Abstract

The application provides an electronic pyrograph, a preparation method thereof and wearable medical equipment, wherein the electronic pyrograph comprises: the hot melt adhesive layer comprises a first surface and a second surface which is opposite to the first surface, and the hot melt adhesive layer is used for connecting the electronic pyrograph with the receiver; at least one stretchable conductor layer and at least one 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 two elastic matrix layers, or when the number of layers of the stretchable conductor layer is 1, the stretchable conductor layer is clamped between the hot melt adhesive layer and the elastic matrix layer, or one stretchable conductor layer close to the hot melt adhesive layer is clamped between the hot melt adhesive layer and one 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 carrier, such as a fabric surface, through a hot melt adhesive layer.

Description

Electronic pyrograph, preparation method thereof and wearable medical equipment

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. The wearable device can be worn on the body surface to monitor various physiological and biochemical indexes of the human body in real time and for a long time. In recent years, wearable devices are continuously developed towards flexibility, light weight, thinness and intellectualization, and the form of the wearable devices is not limited to traditional forms such as a bracelet, a watch, a wrist strap and the like, but is gradually fused with fabrics such as clothes, caps, trousers, socks and the like, namely, electronic circuits in the wearable devices can be directly integrated on the fabrics.

The liquid metal has both the conductivity of the metal and the flowability of the liquid, and manufacturing the circuit by using the liquid metal can lead the circuit to have excellent flexibility and tensile property, thus being an ideal material for preparing wearable equipment. Liquid metal can be printed and printed on a flat surface by means of ink-jet printing, screen printing, etc., however, for a complex surface of a fabric that is not flat, liquid metal is difficult to print directly. The liquid metal can be plated on the surface of the fabric in the modes of word leakage plate, spraying and the like, however, the liquid metal pattern manufactured by the method has low precision and is difficult to package, and the liquid metal solution is influenced by the outside, such as water washing, physical rubbing and water vapor corrosion, so that the liquid metal circuit is invalid. The manufacturing of the circuit on the fabric can be realized by using the conductive fiber, and 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 of weaving the conductive fiber, and the method is only suitable for the preparation of the circuit with large line width; moreover, the process for weaving the conductive fibers is complex, professional mechanical equipment is needed, and the method is not suitable for personalized customization.

In view of at least one of the problems, the application provides a novel electronic pyrograph, a preparation method thereof and a wearable medical device.

Disclosure of Invention

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the invention is not intended to define the key features and 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.

In one aspect, an embodiment of the present application provides an electronic pyrograph, where the electronic pyrograph includes:

the electronic hot-melt adhesive layer comprises a first surface and a second surface which is opposite to the first surface, and the hot-melt adhesive layer is used for connecting the electronic hot-melt painting with a receiver;

at least one stretchable conductor layer and at least one elastic matrix layer disposed between the first surface of the hot melt adhesive layer and the first release layer, wherein,

When the number of layers of the elastic matrix layer is greater than or equal to 2, each of the stretchable conductor layers is sandwiched between two of the elastic matrix layers, or

When the number of layers of the elastic matrix 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 layer is greater than or equal to 2, and the number of layers of the stretchable conductor layer 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 respectively sandwiched between the two elastic matrix layers.

In one embodiment, 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 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.

In one embodiment, the adhesive further comprises a second release layer attached to a second surface of the hot melt adhesive layer.

In one embodiment, when the number of layers of the stretchable conductor layer is 1, the stretchable conductor layer includes a strain sensor or a circuit layer, and when the number of layers of the stretchable conductor layer 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 portion of the stretchable conductor layers of a layer include a strain sensor layer, and another portion of the stretchable conductor layers include a circuit layer.

In one embodiment, each of the hot melt adhesive film layers has a thickness of 5-200 microns;

the thickness of each elastic matrix layer is 10-500 micrometers;

The stretchable conductor layer has a thickness of 1-100 microns on average.

The application also provides a preparation method of the electronic pyrograph, which comprises 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 which is opposite to the first surface, and the hot melt adhesive layer is used for bonding the electronic hot-dip picture and the receptor;

forming at least one stretchable conductor layer and at least one elastomeric matrix layer between a first surface of the hot melt adhesive layer and the first release layer, wherein,

In one embodiment, forming at least one stretchable conductor layer and at least one elastomeric matrix layer between a first surface of the hot melt adhesive layer and the first release layer comprises:

Repeating the steps of alternately forming a stretchable conductor layer and forming an elastic matrix layer on the first surface of the hot melt adhesive layer at least once, wherein the elastic matrix layer formed in the last time is stuck with the first release layer; or alternatively

Forming an elastic matrix layer on the surface of the first release layer, and repeatedly and alternately performing 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 adhered on the elastic matrix layer formed in the last time; or alternatively

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 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 latter layer, further comprising the step of forming a through-hole in an elastic matrix layer intended to cover the stretchable conductor layer of the former layer,

The stretchable conductor layer of the subsequent layer also fills the via to form an electrical connection with the stretchable conductor layer of the previous layer when the stretchable conductor layer of the subsequent layer is formed.

providing a first elastic matrix layer, bonding the first elastic matrix layer and the first release layer,

Forming a first stretchable conductor layer on a surface of the first elastic matrix layer,

Providing a second elastomeric matrix layer, covering said first stretchable conductor layer with said second elastomeric matrix layer,

Covering the first surface of the hot melt adhesive layer with the second elastic matrix layer; or alternatively

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,

And covering the surface of the first elastic matrix layer, which is away from the first release layer, with the first stretchable conductor layer, and bonding the first elastic matrix layer and the second elastic matrix layer.

Still another aspect of the present application provides a wearable medical device, comprising: the electronic pyrograph or the electronic pyrograph prepared by the preparation method.

According to the electronic pyrograph and 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, and the electronic pyrograph can be transferred to the surface of a carrier such as a fabric through the hot melt adhesive layer and is tightly combined with the carrier; the electronic hot-melt adhesive layer is used for easily transferring the stretchable conductor layer to the surface of a carrier such as a fabric, so that the operation is simple, and professional equipment is not needed to realize personalized customization; the stretchable conductor layer in the electronic pyrograph has good packaging, is not oxidized after long-term use, and does not cause harm to human bodies.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.

In the drawings:

FIG. 1 illustrates an exploded schematic view of an electronic pyrograph according to one embodiment of the application;

FIG. 2 illustrates a schematic cross-sectional view of an electronic pyrograph according to one embodiment of the application;

FIG. 3 illustrates an exploded schematic view of an electronic pyrograph according to another embodiment of the application;

FIG. 4 shows a schematic cross-sectional view of an electronic pyrograph according to another embodiment of the application;

Fig. 5 shows a flowchart of a method for preparing an electronic pyrograph according to an embodiment of the application.

Reference numerals:

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 with reference to the accompanying drawings. It should be apparent that the described embodiments are only some 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 by the example embodiments described herein. Based on the embodiments of the application described in the present application, all other embodiments that a person skilled in the art would have without inventive effort shall fall within the scope 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 application may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the application.

It should be understood that the present application may be embodied 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, detailed structures will be presented in the following description in order to illustrate the technical solutions presented by the present application. Alternative embodiments of the application are described in detail below, however, the application may have other implementations in addition to these detailed descriptions.

Next, an electronic pyrograph according to an embodiment of the present application will be described with reference first to fig. 1 to 4, wherein fig. 1 shows an exploded schematic view of the electronic pyrograph according to an embodiment of the present application; FIG. 2 illustrates a schematic cross-sectional view of an electronic pyrograph according to one embodiment of the application; FIG. 3 illustrates an exploded schematic view of an electronic pyrograph according to another embodiment of the application; fig. 4 shows a schematic cross-sectional view of an electronic pyrograph according to another embodiment of the application.

As an example, the present application provides an electronic pyrograph including: the electronic hot-melt adhesive layer comprises a first surface and a second surface which is opposite to the first surface, and the hot-melt adhesive layer is used for connecting the electronic hot-melt painting with a receiver; at least one stretchable conductor layer and at least one elastic matrix layer are arranged between the first surface of the hot melt adhesive layer and the first release layer, when the number of layers of the elastic matrix layer is greater than or equal to 2, each stretchable conductor layer is sandwiched between two elastic matrix layers, or when the number of layers of the elastic matrix 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 layer is greater than or equal to 2, and when the number of layers of the stretchable conductor layer 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 layer, and the other stretchable conductor layers are respectively sandwiched between two layers of the elastic matrix layers. The stretchable conductor layer is clamped between two adjacent elastic matrix layers or between the hot melt adhesive layer and the elastic matrix layers, so that the stretchable conductor layer is packaged, and the stretchable conductor layer is not oxidized and is not damaged to human bodies after long-term use. The electronic pyrograph can be transferred to the surface of a carrier, such as a fabric, through the hot melt adhesive layer and is tightly combined with the carrier, and the wearable medical equipment with the electronic pyrograph has excellent flexibility and stretchability.

The number of the stretchable conductor layers included in the electronic pyrograph can be set reasonably according to actual needs, for example, 1 layer, 2 layers, 3 layers or more, adjacent stretchable conductor layers can be separated by at least one elastic matrix layer, wherein the elastic matrix layer can be omitted between the hot melt adhesive layer and one 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 comprises a second release layer (not shown) attached to the second surface of the hot melt adhesive layer. The second release layer plays a role in supporting and protecting the electronic pyrograph before the electronic pyrograph is transferred to the carrying object, when the electronic pyrograph is transferred to the carrying object, the release layer can be easily separated from other parts in the electronic pyrograph, and other parts in the electronic pyrograph cannot be adhered to the release layer.

Optionally, when the number of layers of the stretchable conductor layer is 1 layer, the stretchable conductor layer includes a strain sensor or a circuit layer, and when the number of layers of the stretchable conductor layer is greater than or equal to 2 layers, the stretchable conductor layers of different layers each include a strain sensor or a circuit layer, or a part of the stretchable conductor layers of layers include a strain sensor layer, and the stretchable conductor layers of another layer include a circuit layer. Optionally, the stretchable conductor layers of adjacent layers are electrically connected to each other. The types of strain sensors for the different layers may be different or the same, and the types of circuit layers for the 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 heat can be generated to heat the wearing part 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 components such as transistors, diodes, capacitors, inductors, resistors, and the like.

In some embodiments, as shown in fig. 1 and 2, the electronic hot-dip may include a first stretchable conductive layer 3, a first elastic substrate layer 4, a second elastic substrate layer 2, a hot-melt adhesive layer 1, and a first release layer 5, wherein the second elastic substrate layer 2 covers a first surface of the hot-melt adhesive layer 1, the first stretchable conductive layer 3 is formed on a surface of the second elastic substrate layer 2, the first elastic substrate layer 4 covers the first stretchable conductive layer 3, the first release layer 5 covers the first elastic substrate layer 4, and functions to support and protect the electronic hot-dip by the release layer before the electronic hot-dip is transferred to the carrier, and the release layer may be easily separated from other parts in the electronic hot-dip after the electronic hot-dip is transferred to the carrier, and other parts in the electronic hot-dip may not adhere to the release layer.

It should be noted that the second elastic substrate layer 2 may be selectively disposed, and in some embodiments, the electronic pyrograph may not be provided with the second elastic substrate layer 2, while the first stretchable conductor layer 3 is disposed on the hot melt adhesive layer 1, and other settings may be unchanged.

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, a through hole 8 is provided 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 position and number of the through holes 8 may be reasonably set according to actual needs, and the first stretchable conductor layer 3 or the second stretchable conductor layer 6 further fills the through hole 8, so that the first stretchable conductor layer 3 and the second stretchable conductor layer 6 are electrically connected. For example, as shown in fig. 3 and 4, the second elastic matrix 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 matrix layer 2, the first elastic matrix layer 4 covers the first stretchable conductor layer 3, the second stretchable conductor layer 6 is formed on the first elastic matrix layer 4, the second stretchable conductor layer 6 is covered by the third elastic matrix layer 7, wherein a through hole 8 is provided on the third elastic matrix layer 7, a part of the second stretchable conductor layer 6 may further fill the through hole 8, so that an electrical connection is formed by the stretchable conductor layer filled in the through hole 8 and the first stretchable conductor layer 3, and the first release layer 5 covers the third elastic matrix layer 7.

In the application, the material of the stretchable conductor layer comprises liquid metal, the liquid metal has the conductivity of the metal and the flowability of the liquid, and the circuit manufactured by using the liquid metal can have 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: gallium simple substance, gallium indium alloy, gallium zinc alloy, gallium tin alloy, gallium indium zinc alloy, bismuth tin lead indium alloy; in some embodiments, the stretchable conductor layer may further comprise at least one of the following materials: stretchable nano-materials such as carbon nanotubes, silver nanowires, silver nanorods, and the like. The stretchable conductor layer has an average thickness of 1-100 microns or other suitable thickness. The liquid metal stretchable circuit layer is formed by patterning liquid metal on the elastic matrix layer by adopting the modes of screen printing, ink-jet printing, word leakage plate, spraying, vapor plating, magnetron sputtering and the like.

Optionally, when the stretchable conductor layer includes a strain sensor, the strain sensor may be stretched with movement of the limb or joint to which it is attached to cause a change in resistance and thus a change in current in the circuit to thereby act as a monitor for 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, ink-jet printing, stencil printing, spraying, evaporating, magnetron sputtering, or the like.

In some embodiments, the elastic matrix layer is both the base of the stretchable conductor layer and the 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, sandwiching the stretchable conductor layer between the two elastic matrix layers. Optionally, the elastic matrix layer includes any one 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, a latex-based elastic material. Alternatively, the elastic matrix layer may have a thickness of 10-500 microns or other suitable thickness, wherein different thicknesses or substantially the same thickness may be used for the elastic matrix layers of different layers, different materials may be used for the elastic matrix layers of different layers, or the same material may be used.

In the application, the hot melt adhesive film layer is used for bonding with the fabric and other objects, and the hot melt adhesive film layer is bonded with the fabric and other objects under the action of hot pressing, so that the bonding is tight, and the hot melt adhesive film layer cannot fall off even under various deformation. The hot melt adhesive film layer comprises any one or a 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 copolymer material and the like. Alternatively, the thickness of the hot melt adhesive film layer is 5-200 microns or other suitable thickness.

In the application, the release layer plays a role in supporting and protecting the electronic pyrograph before the electronic pyrograph is transferred to the carrying object, and after the electronic pyrograph is transferred to the carrying object, the release layer can be easily separated from other parts in the electronic pyrograph, and other parts in the electronic pyrograph cannot be adhered on the release layer. Particularly, under the condition that the stretchable conductor layer in the electronic pyrograph is quite thin, if a proper supporting protection layer is not provided, the circuit part in the electronic pyrograph is either wrinkled into a group due to static electricity or other actions and is difficult to spread, or is stuck on the supporting protection film, so that the circuit part in the electronic pyrograph is damaged; optionally, the release layer may be a release paper layer, where the release paper layer includes a silicone film, silicone paper, glassine, laminated 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 in the range, so that the release paper layer can be suitable for transfer printing of the supports in different shapes.

Further, the application also provides some exemplary preparation methods of the electronic pyrograph, and the description below refers to the accompanying drawings, and on the premise of no conflict, the technical features of the application can be combined with each other.

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 which is opposite to the first surface, and the hot melt adhesive layer is used for bonding the electronic pyrograph and the receptor;

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,

It should be noted that, in the present application, step S510 may be further performed in step S520, and the method for preparing an electronic pyrograph according to some embodiments of the present application will be illustrated with reference to fig. 1 and 2, but it is understood that these methods are merely exemplary, and may be applied to other methods for preparing an electronic pyrograph capable of obtaining the foregoing embodiments of the present application.

In step S520, the steps of forming a stretchable conductor layer and forming an elastic matrix layer on the first surface of the hot-melt adhesive layer may be repeated and alternately performed at least once, wherein the elastic matrix layer formed in the last time is coated with the first release layer; alternatively, an elastic matrix layer is formed on the first surface of the hot melt adhesive layer, and the steps of forming a stretchable conductor layer and forming an elastic matrix layer are repeatedly and alternately performed at least once on the elastic matrix layer, wherein the elastic matrix layer formed last time is pasted with the first release layer, alternatively, the first release layer and the elastic matrix layer can be combined before the elastic matrix layer formed last time contacts with the stretchable conductor layer to be covered, and then the surface of the elastic matrix layer formed last time, which is away from the first release layer, is covered with the stretchable conductor layer, or the first release layer and the elastic matrix layer can be combined after the elastic matrix layer formed last time covers the stretchable conductor layer.

In other embodiments, step S520 may be further implemented by forming an elastic matrix layer on the surface of the first release layer, and repeating the steps of alternately forming a stretchable conductor layer and forming an elastic matrix layer on the elastic matrix layer at least once, where 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 last time.

In some embodiments, the electronic pyrograph including one stretchable conductor layer and two elastic matrix layers is scheduled to be formed, and then 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 the method includes steps A1 to A4:

In step A1, a first elastic matrix layer 4 is provided, the first elastic matrix layer 4 and the first release layer 5 are bonded, and the first elastic matrix layer 4 and the first release layer 5 may be bonded by any suitable means, for example, an elastic material with a suitable thickness is selected as the first elastic matrix layer from candidate materials of the elastic matrix layers, the first elastic matrix layer 4 is bonded to the release paper layer by pressing, or any one or a combination of at least two of hot pressing, cold pressing, dissolution/melt spin coating, dissolution/melt doctor-blading, or dissolution/melt casting is also possible.

In step A2, the first stretchable conductor layer 3 is formed on the surface of the first elastic matrix layer 4, and the liquid metal is patterned on the elastic matrix layer by, for example, screen printing, ink-jet printing, stencil printing, spraying, evaporation, magnetron sputtering, or the like, to obtain the first stretchable conductor layer 3.

In step A3, a second elastic matrix layer 2 is provided, said second elastic matrix layer 2 covering said first stretchable conductor layer 3 and being joined to said first elastic matrix layer 4 such that the first stretchable conductor layer 3 is sandwiched between the second elastic matrix layer 2 and the first elastic matrix 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 joined.

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, comprising steps B1 to B4:

In step B1, a second elastic matrix layer 2 is provided, the second elastic matrix layer 2 is formed on the first surface of the hot melt adhesive layer 1, i.e. the first surface of the hot melt adhesive layer 1 and the second elastic matrix layer 2 are joined,

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, said first elastic matrix layer 4 and said first release layer 5 are joined,

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 respective film layers may be sequentially prepared in the order from the hot melt adhesive layer 1 to the first release layer 5, or 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, for example, before forming the stretchable conductor layer of the subsequent layer, further comprising the step of forming a via on the elastic matrix layer predetermined to cover the stretchable conductor layer of the previous layer, the stretchable conductor layer of the subsequent layer further filling the via when forming the stretchable conductor layer of the subsequent layer, to form an electrical connection with the stretchable conductor layer of the previous layer. It should be noted that the stretchable conductor layer of the subsequent layer and the stretchable conductor layer of the previous layer are defined in terms of the order of formation, wherein the stretchable conductor layer of the subsequent 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, at least one stretchable conductor layer and at least two elastic matrix layers are formed between the first surface of the hot melt adhesive layer 1 and the first release layer 5, and the method includes the following steps C1 to C6:

In step C1, providing a first elastic matrix layer 4, bonding 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 matrix layer 2, covering said second elastic matrix layer 2 over said first stretchable conductor layer 3 and being joined to said first elastic matrix layer 4;

in step C4, forming a second stretchable conductor layer 6 on the second elastic matrix layer 2;

in step C5, providing a third elastic matrix layer 7, covering said third elastic matrix layer 7 over said second stretchable conductor layer 6 and being joined to said second elastic matrix 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 comprises: forming a through hole 8 in the second elastic matrix layer 2; wherein, when forming the second stretchable conductor layer 6 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 elastic matrix layer may be perforated by a cutting machine such as a laser cutter, a lettering machine, etc. 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 steps A2 and A3 may be exchanged. The electronic pyrograph comprising at least two stretchable conductor layers can be obtained by repeating the steps A2 and A3.

In some embodiments, the method may further comprise the steps of: the second release layer is used in combination with the hot melt adhesive layer 1 to protect the hot melt adhesive layer 1 before the electronic pyrograph is used.

In the foregoing step, the bonding means between the two elastic matrix layers or between the elastic matrix layers and the bonding means between the hot melt layers include any one or a combination of at least two of hot pressing, cold pressing, dissolution/melt spin coating, dissolution/melt knife coating, or dissolution/melt casting.

After the electronic pyrograph is prepared, one surface of the hot melt adhesive layer can be contacted with the carrying object, and the electronic pyrograph and the carrying object are pressed together by using a hot pressing method. 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 onto the carrying object. Alternatively, the carrier comprises any one or a combination of at least two of various fabrics, silicone rubber-based elastic materials, polystyrene-based elastic materials, polyolefin-based elastic materials, or polyurethane-based elastic materials, latex-based elastic materials.

In one specific embodiment, an exemplary method of preparing an electronic pyrograph includes: providing, for example, a hot melt polyurethane film as the first elastic substrate layer 4, wherein the first elastic substrate layer 4 has a thickness of 10-500 micrometers, for example, any one of a thickness of 40 micrometers, 50 micrometers, 60 micrometers, 80 micrometers, 100 micrometers, etc., providing the first release layer 5, wherein the first release layer 5 has a thickness of 10-500 micrometers, for example, any one of a thickness of 50 micrometers, 80 micrometers, 100 micrometers, 120 micrometers, 150 micrometers, etc., the first release layer 5 may be a silicone paper, bonding one side of the elastic substrate layer to a silicone oil coated side of the silicone paper by, for example, a heat press, the heat press temperature may be any suitable temperature, for example, a heat press temperature of 100-150 ℃, for example, a heat press temperature of 100 ℃, 110 ℃, 130 ℃, 140 ℃, 150 ℃, the heat press time may be any suitable time, for example, a heat press time of 10 seconds-60 seconds, for example, 10 seconds, 20 seconds, 30 seconds, 40 seconds, 50 seconds, 60 seconds, a heat press pressure of any one of kg cm/kg cm/372 cm/kg cm/cm, a heat press pressure of any suitable for example, a heat press of kg cm/kg cm/372 cm/3/cm/suitable. 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 matrix layer such as a hot-melt polyurethane film, optionally, the thickness of the second elastic matrix layer 2 is 10-500 micrometers, for example, the thickness can be any one of 40 micrometers, 50 micrometers, 60 micrometers, 80 micrometers, 100 micrometers and the like, covering the second elastic matrix layer on a stretchable conductor layer (such as a liquid metal stretchable circuit layer), bonding the stretchable conductor layer with the first elastic matrix layer 4 by a hot-pressing mode, sandwiching the stretchable conductor layer between the two elastic matrix layers, optionally, the hot-pressing temperature can be any suitable temperature, then selecting thermoplastic polyurethane as the hot-melt adhesive layer 1, optionally, the thickness of the hot-melt adhesive layer 1 can be obtained by combining the hot-melt adhesive layer 1 with the second elastic matrix layer 2 by a hot-pressing method, and thus obtaining the liquid metal electronic pyrograph. The hot melt adhesive layer is contacted with the carrier, the hot melt adhesive layer and the carrier are adhered 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 carrier after the release paper layer is removed.

In another embodiment, for example, the hot-melt polyurethane film is selected as the first elastic substrate layer 4, and the thickness of the first elastic substrate layer 4 is 10-500 micrometers, for example, any one of thicknesses of 40 micrometers, 50 micrometers, 60 micrometers, 80 micrometers, 100 micrometers and the like, and the first release layer 5 is provided, wherein the thickness of the first release layer 5 is 10-500 micrometers, for example, any one of thicknesses of 50 micrometers, 80 micrometers, 100 micrometers, 120 micrometers, 150 micrometers and the like, and the first release layer 5 can be silicone paper, and one side of the first elastic substrate layer 4 is bonded with one side of the silicone oil paper silicone oil coating by a hot pressing mode. 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 a hot-melt polyurethane film as a second elastic matrix layer 2, cutting through holes 8 on the second elastic matrix layer 2 by using a laser cutting machine, covering the second elastic matrix layer 2 on the first stretchable conductor layer 3, and bonding with the first elastic matrix layer 4 by using a hot-pressing mode; printing a liquid metal on the second elastic matrix layer 2 by a screen printing method to form a second stretchable conductor layer 6 (such as a liquid metal stretchable circuit layer), and pouring the liquid metal at the position of the through hole 8 by using a syringe 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 matrix layer 7, covering the third elastic matrix layer 7 on the second stretchable conductor layer 6, and bonding with the second elastic matrix layer 2 by means of hot pressing; a thermoplastic polyurethane is selected as the hot melt adhesive layer 1, and the hot melt adhesive layer 1 and the third elastic matrix layer 7 are combined by a hot pressing method to obtain the liquid metal electronic pyrograph. The hot melt adhesive layer is contacted with the carrying object, the hot melt adhesive layer and the carrying object are adhered in a hot pressing mode, and the liquid metal stretchable circuit can be obtained on the carrying object after the first release layer 5 is removed.

In the present application, parameters of the hot pressing may be reasonably set according to actual needs, for example, the hot pressing temperature is any suitable temperature of 100 ℃ to 150 ℃, for example, the hot pressing temperature is any suitable temperature of 100 ℃, 110 ℃, 120 ℃, 125 ℃, 130 ℃, 135 ℃, 140 ℃, 150 ℃, the hot pressing time may be any suitable time, for example, the hot pressing time is any time of 10 seconds to 60 seconds, for example, 10 seconds, 15 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/square centimeter, for example, the hot pressing pressure may be any suitable pressure of 1 to kg/square centimeter, 2 kg/square centimeter, 3 kg/square centimeter, 4 kg/square centimeter, 5 kg/square centimeter, and 6 kg/square centimeter.

In summary, the electronic pyrograph and the preparation method thereof have the following beneficial effects:

(1) According to the electronic hot-stamping picture, the liquid metal circuit is combined with the thermal transfer hot-stamping picture, the hot-melting glue layer is contacted with the carrying object, the hot-melting glue layer can be adhered with the carrying object such as fabric in a hot-pressing mode, the hot-stamping picture process is completed after the first release layer is removed, and the liquid metal stretchable circuit can be obtained on the carrying object.

(2) After the electronic pyrograph is processed by the hot pressing method, the stretchable conductor layer in the electronic pyrograph, such as a liquid metal circuit, can be transferred to the surface of the object to be received, and the circuit transferred to the surface of the object to be received has excellent flexibility and stretchability, good conformality and can be deformed together with the object to be received.

(3) Because of 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 deformation, 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 long-term use.

The application further provides the wearable medical equipment, which 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 a fabric or other suitable material that may be configured to match the size of the body part to be worn, e.g., the wearable medical device may be worn at the knee of a human body, or at a joint of a finger, etc., to facilitate monitoring movement of the body part. And, can transfer the electron pyrography to the carrier such as fabric surface through the hot melt adhesive layer to combine closely with the carrier, the wearable medical equipment that has this electron pyrography 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 detection range of the wearable device on the body surface can be greatly increased due to the fusion of the electronic circuit in the wearable device and the fabric; secondly, the fabric has the characteristics of softness, close fitting and the like, the electronic circuit in the wearable medical equipment is fused with the fabric to enable the fabric to be more close fitting, and the sensor in the wearable medical equipment can be closely attached to the body surface in the detection process, so that a stable measurement interface is provided, and measurement noise is greatly reduced; third, the combination of the electronic circuitry in the wearable device with the fabric greatly increases its comfort, and the user has less foreign body sensation during use, and is comfortable and breathable. Therefore, the electronic circuit and the fabric in the wearable medical equipment are fused, and the wearable medical equipment has a huge application prospect in the fields of medical health and man-machine interaction.

It should be noted that the wearable medical device may have other components, such as a battery, besides the electronic pyrograph and the carrier, where the battery may be electrically connected to the stretchable conductor layer in the electronic pyrograph, so as to provide an operating voltage for the stretchable conductor layer, and so on.

Although the illustrative embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above illustrative embodiments are merely illustrative and are not intended to limit the scope of the present application thereto. Various changes and modifications may be made therein by one of ordinary skill in the art without departing from the scope and spirit of the application. All such changes and modifications are intended to be included within the scope of the present application as set forth 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 order to streamline the application and aid in understanding one or more of the various inventive aspects, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of the application. However, the method of the present application should not be construed as reflecting the following intent: i.e., the claimed application requires more features than are expressly recited in each claim. 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 units of any method or apparatus so disclosed, may be combined in any combination, except combinations where the 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 but not others included in other embodiments, 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 foregoing description is merely illustrative of specific embodiments of the present application and the scope of the present application is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present application. The protection scope of the application is subject to the protection scope of the claims.

Claims

1. An electronic pyrograph, characterized in that the electronic pyrograph comprises:

The hot melt adhesive layer comprises a first surface and a second surface which is opposite to the first surface, the hot melt adhesive layer is used for connecting the electronic hot-dip picture with a receiver, the hot melt adhesive layer is bonded with the receiver in a hot-pressing mode, and the receiver is constructed into a fabric which is matched with the size of a body part where the electronic hot-dip picture needs to be worn;

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 layer is greater than or equal to 2 and the number of layers of the stretchable conductor layer is greater than or equal to 2, one stretchable conductor layer close to the hot melt adhesive layer is clamped between the hot melt adhesive layer and one elastic matrix layer, and the other stretchable conductor layers are respectively clamped between the two elastic matrix layers;

The at least one stretchable conductor layer comprises a first stretchable conductor layer and a second stretchable conductor layer electrically connected with the first stretchable conductor layer, a through hole is arranged 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 also fills the through hole;

When the number of layers of the stretchable conductor layer is 1, the stretchable conductor layer includes a strain sensor or a circuit layer, and when the number of layers of the stretchable conductor layer 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 of layers include a strain sensor layer, and the stretchable conductor layers of the other layers include a circuit layer.

2. The electronic pyrograph of claim 1, further comprising a second release layer attached to a second surface of the hot melt adhesive layer.

3. The electronic pyrograph of claim 1, wherein each layer of the hot melt adhesive layer has a thickness of 5-200 microns;

the thickness of each elastic matrix layer is 10-500 micrometers;

The stretchable conductor layer has a thickness of 1-100 microns on average.

4. The preparation method of the electronic pyrograph is characterized by comprising the following steps of:

Forming at least one stretchable conductor layer and at least one elastomeric matrix layer between a first surface of the hot melt adhesive layer and the first release layer, comprising:

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 in the last time;

The stretchable conductor layer of the subsequent layer also fills the via to form an electrical connection with the stretchable conductor layer of the previous layer when the stretchable conductor layer of the subsequent layer is formed;

The hot melt adhesive layer is bonded with the carrying object in a hot pressing mode, and the carrying object is constructed into a fabric matched with the size of a body part where the electronic pyrograph needs to be worn.

5. A wearable medical device, the wearable medical device comprising:

An electronic pyrograph as claimed in any one of claims 1 to 3 or prepared by the preparation method as claimed in claim 4.