CN114126112A - Polymer electrothermal film electrode and production process thereof - Google Patents
Polymer electrothermal film electrode and production process thereof Download PDFInfo
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- CN114126112A CN114126112A CN202111396912.1A CN202111396912A CN114126112A CN 114126112 A CN114126112 A CN 114126112A CN 202111396912 A CN202111396912 A CN 202111396912A CN 114126112 A CN114126112 A CN 114126112A
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- 229920000642 polymer Polymers 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 229920006254 polymer film Polymers 0.000 claims abstract description 82
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 75
- 229910052802 copper Inorganic materials 0.000 claims abstract description 71
- 239000010949 copper Substances 0.000 claims abstract description 71
- 239000002216 antistatic agent Substances 0.000 claims abstract description 18
- 239000012528 membrane Substances 0.000 claims abstract description 17
- 239000004014 plasticizer Substances 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims description 40
- 239000004698 Polyethylene Substances 0.000 claims description 36
- -1 polyethylene Polymers 0.000 claims description 36
- 229920000573 polyethylene Polymers 0.000 claims description 36
- 238000001816 cooling Methods 0.000 claims description 18
- 238000007731 hot pressing Methods 0.000 claims description 18
- 239000003381 stabilizer Substances 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 13
- 239000003963 antioxidant agent Substances 0.000 claims description 12
- 230000003078 antioxidant effect Effects 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 12
- 238000004806 packaging method and process Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 238000010030 laminating Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000000071 blow moulding Methods 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 239000002861 polymer material Substances 0.000 claims description 6
- 229920005597 polymer membrane Polymers 0.000 claims 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052709 silver Inorganic materials 0.000 abstract description 10
- 239000004332 silver Substances 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract description 3
- 238000007493 shaping process Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 5
- 239000011889 copper foil Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/03—Electrodes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a polymer electrothermal membrane electrode and a production process thereof. Cover the copper net layer through setting up two-layer polymer film, can make the inseparable cover of copper net layer and polymer rete be in the same place, also can not receive the influence when the bending, compare traditional technology, avoided the electric current to produce the phenomenon of striking sparks between copper net layer and the silver thick liquid through the back, great promotion the security of this electrode, and increased the antistatic agent in the polymer film, and the antistatic agent can give the polymer rete with slight to medium electric conductivity, thereby can prevent the accumulation of electrostatic charge on the goods, and the plasticizer has still been added, the plasticity and the compliance of multiplicable polymer rete, reduce the fragility, make this product easily machine-shaping.
Description
Technical Field
The invention relates to the field of polymer electrothermal films, in particular to a polymer electrothermal film electrode and a production process thereof.
Background
The electrothermal film is divided into high-temperature and low-temperature electrothermal films. The high-temperature electrothermal film is generally used for electronic appliances, military affairs and the like, and is produced by the present science and technology. The electrothermal film heating system is different from a point heating system represented by a radiator, an air conditioner and a radiator and a line heating system represented by a heating cable, and is a low-carbon heating high-tech product researched and developed by adopting the modern aerospace technology in the field of surface heating.
In the prior art, silver paste is printed on the surface of a polymer electrothermal film, and copper foil is covered on the silver paste. The advantage is because printing silver thick liquid is more than thin resistance, can effectively increase the conductivity behind the cladding copper bar, prevents the tail end voltage drop. But the membrane is because the copper foil covers and can't closely combine with silver thick liquid on silver thick liquid surface, leads to silver thick liquid and copper foil contact not good after the electric heat membrane is crooked, and the electric current produces the phenomenon of striking sparks behind the copper foil and between the silver thick liquid, potential safety hazards such as conflagration take place easily.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the problems in the prior art, and provides a high-molecular electrothermal film electrode and a production process thereof.
Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A high-molecular electrothermal membrane electrode comprises a lower high-molecular membrane layer, wherein copper mesh layers are arranged on two sides of the lower high-molecular membrane layer, and an upper high-molecular membrane layer is arranged on the surface of each copper mesh layer.
Further, go up polymer film layer, lower polymer film layer and copper screen layer from the top down and set gradually, go up polymer film layer, lower polymer film layer and the whole sandwich structure setting that is of copper screen layer.
A production process of a polymer electrothermal membrane electrode comprises the following production processes:
s1, preparing a polymer film raw material: preparing formula amounts of polyethylene, EVA, an antioxidant, a plasticizer, a stabilizer and an antistatic agent;
s2, mixing the raw materials: putting the polyethylene and the EVA into a mixer for mixing;
s3, drying raw materials: putting the polyethylene and EVA raw material particles into a dryer for drying for 1-2h, and taking out the dried raw material particles for later use;
s4, extrusion: putting the dried polyethylene and EVA raw materials into an extruder, and adding an antioxidant, a plasticizer, a stabilizer and an antistatic agent into the extruder;
s5, air cooling forming: synchronously feeding the film extruded by the extruder into a blow molding machine for cooling and molding to form a polymer film;
s6, setting a copper mesh layer: arranging copper mesh layers on two sides of the polymer film, and then covering a layer of polymer film on the upper end of the copper mesh layer;
s7, laminating a copper mesh layer: the method comprises the following steps that a copper mesh layer is sandwiched between two polymer film layers, hot pressing is carried out through a hot press, the hot pressing temperature is set to be 160 ℃ high temperature, laminating is carried out, so that the two polymer films are quickly pressed on the surface of the copper mesh layer through high pressure in a semi-molten state, and the polymer films penetrate through the copper mesh and are welded with opposite polymer films together in a high-pressure state to form a conducting bar of the polymer material coated copper mesh layer;
s8, cooling and packaging: after high-temperature hot pressing, waiting for the product to be naturally cooled, and then packaging the product under the dustless condition.
Further, when the polyethylene and the EVA are mixed in the step S2, the temperature in the mixer is kept at 50 ℃, the rotating speed of a stirrer in the mixer is 60-100r/min, and the stirring time is 5-8 min.
Further, the thickness of the polymer film formed in S5 was 0.05 MM.
Further, the dosage of the stabilizer in the S4 is 0.2-0.5% of the raw materials of the polyethylene and the EVA.
Advantageous effects
Compared with the prior art, the invention has the advantages that:
this scheme covers the copper net layer through setting up two-layer polymer film, can make the inseparable cover of copper net layer and polymer rete be in the same place, also can not receive the influence when the bending, compare traditional technology, avoided the electric current to produce the phenomenon of striking sparks between copper net layer and the silver thick liquid through the back, great promotion the security of this electrode, and increased the antistatic agent in the polymer film, and the antistatic agent can give the polymer rete with slight to medium electric conductivity, thereby can prevent the accumulation of electrostatic charge on the goods, and the plasticizer has still been added, the plasticity and the compliance of multiplicable polymer rete, reduce the fragility, make this product easily machine-shaping.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a flow chart of the production process of the present invention.
The reference numbers in the figures illustrate:
1. a lower polymer film layer; 2. an upper polymer film layer; 3. copper mesh layer.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1:
referring to fig. 1, a polymer electrothermal film electrode includes a lower polymer film layer 1, a copper mesh layer 3 is disposed on both sides of the lower polymer film layer 1, an upper polymer film layer 2 is disposed on a surface of the copper mesh layer 3, the upper polymer film layer 2, the lower polymer film layer 1 and the copper mesh layer 3 are sequentially disposed from top to bottom, and the upper polymer film layer 2, the lower polymer film layer 1 and the copper mesh layer 3 are integrally disposed in a sandwich structure.
A production process of a polymer electrothermal membrane electrode comprises the following production processes:
s1, preparing a polymer film raw material: preparing formula amounts of polyethylene, EVA, an antioxidant, a plasticizer, a stabilizer and an antistatic agent;
s2, mixing the raw materials: putting polyethylene and EVA into a mixer for mixing, wherein when the polyethylene and the EVA are mixed, the temperature in the mixer is kept at 50 ℃, the rotating speed of a stirrer in the mixer is 60r/min, and the stirring time is 5 min;
s3, drying raw materials: putting polyethylene and EVA raw material particles into a dryer for drying for 1h, and taking out the dried raw material particles for later use;
s4, extrusion: putting the dried polyethylene and EVA raw materials into an extruder, and adding an antioxidant, a plasticizer, a stabilizer and an antistatic agent into the extruder, wherein the using amount of the stabilizer is 0.2 percent of that of the polyethylene and EVA raw materials;
s5, air cooling forming: synchronously feeding the film extruded by the extruder into a blow molding machine for cooling and molding to form a polymer film, wherein the thickness of the formed polymer film is 0.05 MM;
s6, providing a copper mesh layer 3: arranging a copper net layer 3 on two sides of the polymer film, and then covering a layer of polymer film on the upper end of the copper net layer 3;
s7, copper mesh layer 3: the method comprises the following steps of (1) hot-pressing a copper net layer 3 sandwiched between two polymer film layers through a hot press, setting the hot-pressing temperature to be 160 ℃ for laminating, enabling the two polymer films to be quickly pressed on the surface of the copper net layer 3 through high pressure in a semi-molten state, and enabling the polymer films to penetrate through the copper net and be welded with opposite polymer films together through the high pressure state to form a conducting strip of the polymer material coated copper net layer 3;
s8, cooling and packaging: after high-temperature hot pressing, waiting for the product to be naturally cooled, and then packaging the product under the dustless condition.
Example 2:
a production process of a polymer electrothermal membrane electrode comprises the following production processes:
s1, preparing a polymer film raw material: preparing formula amounts of polyethylene, EVA, an antioxidant, a plasticizer, a stabilizer and an antistatic agent;
s2, mixing the raw materials: putting polyethylene and EVA into a mixer for mixing, wherein when the polyethylene and the EVA are mixed, the temperature in the mixer is kept at 50 ℃, the rotating speed of a stirrer in the mixer is 75r/min, and the stirring time is 6 min;
s3, drying raw materials: putting polyethylene and EVA raw material particles into a dryer for drying for 1h, and taking out the dried raw material particles for later use;
s4, extrusion: putting the dried polyethylene and EVA raw materials into an extruder, and adding an antioxidant, a plasticizer, a stabilizer and an antistatic agent into the extruder, wherein the using amount of the stabilizer is 0.3 percent of that of the polyethylene and EVA raw materials;
s5, air cooling forming: synchronously feeding the film extruded by the extruder into a blow molding machine for cooling and molding to form a polymer film, wherein the thickness of the formed polymer film is 0.05 MM;
s6, providing a copper mesh layer 3: arranging a copper net layer 3 on two sides of the polymer film, and then covering a layer of polymer film on the upper end of the copper net layer 3;
s7, copper mesh layer 3: the method comprises the following steps of (1) hot-pressing a copper net layer 3 sandwiched between two polymer film layers through a hot press, setting the hot-pressing temperature to be 160 ℃ for laminating, enabling the two polymer films to be quickly pressed on the surface of the copper net layer 3 through high pressure in a semi-molten state, and enabling the polymer films to penetrate through the copper net and be welded with opposite polymer films together through the high pressure state to form a conducting strip of the polymer material coated copper net layer 3;
s8, cooling and packaging: after high-temperature hot pressing, waiting for the product to be naturally cooled, and then packaging the product under the dustless condition.
Example 3:
a production process of a polymer electrothermal membrane electrode comprises the following production processes:
s1, preparing a polymer film raw material: preparing formula amounts of polyethylene, EVA, an antioxidant, a plasticizer, a stabilizer and an antistatic agent;
s2, mixing the raw materials: putting polyethylene and EVA into a mixer for mixing, wherein when the polyethylene and the EVA are mixed, the temperature in the mixer is kept at 50 ℃, the rotating speed of a stirrer in the mixer is 80r/min, and the stirring time is 7 min;
s3, drying raw materials: putting the polyethylene and EVA raw material particles into a dryer for drying for 2h, and taking out the dried particles for later use;
s4, extrusion: putting the dried polyethylene and EVA raw materials into an extruder, and adding an antioxidant, a plasticizer, a stabilizer and an antistatic agent into the extruder, wherein the using amount of the stabilizer is 0.4 percent of that of the polyethylene and EVA raw materials;
s5, air cooling forming: synchronously feeding the film extruded by the extruder into a blow molding machine for cooling and molding to form a polymer film, wherein the thickness of the formed polymer film is 0.05 MM;
s6, providing a copper mesh layer 3: arranging a copper net layer 3 on two sides of the polymer film, and then covering a layer of polymer film on the upper end of the copper net layer 3;
s7, copper mesh layer 3: the method comprises the following steps of (1) hot-pressing a copper net layer 3 sandwiched between two polymer film layers through a hot press, setting the hot-pressing temperature to be 160 ℃ for laminating, enabling the two polymer films to be quickly pressed on the surface of the copper net layer 3 through high pressure in a semi-molten state, and enabling the polymer films to penetrate through the copper net and be welded with opposite polymer films together through the high pressure state to form a conducting strip of the polymer material coated copper net layer 3;
s8, cooling and packaging: after high-temperature hot pressing, waiting for the product to be naturally cooled, and then packaging the product under the dustless condition.
Example 4:
a production process of a polymer electrothermal membrane electrode comprises the following production processes:
s1, preparing a polymer film raw material: preparing formula amounts of polyethylene, EVA, an antioxidant, a plasticizer, a stabilizer and an antistatic agent;
s2, mixing the raw materials: putting polyethylene and EVA into a mixer for mixing, wherein when the polyethylene and the EVA are mixed, the temperature in the mixer is kept at 50 ℃, the rotating speed of a stirrer in the mixer is 100r/min, and the stirring time is 8 min;
s3, drying raw materials: putting the polyethylene and EVA raw material particles into a dryer for drying for 2h, and taking out the dried particles for later use;
s4, extrusion: putting the dried polyethylene and EVA raw materials into an extruder, and adding an antioxidant, a plasticizer, a stabilizer and an antistatic agent into the extruder, wherein the using amount of the stabilizer is 0.5 percent of that of the polyethylene and EVA raw materials;
s5, air cooling forming: synchronously feeding the film extruded by the extruder into a blow molding machine for cooling and molding to form a polymer film, wherein the thickness of the formed polymer film is 0.05 MM;
s6, providing a copper mesh layer 3: arranging a copper net layer 3 on two sides of the polymer film, and then covering a layer of polymer film on the upper end of the copper net layer 3;
s7, copper mesh layer 3: the method comprises the following steps of (1) hot-pressing a copper net layer 3 sandwiched between two polymer film layers through a hot press, setting the hot-pressing temperature to be 160 ℃ for laminating, enabling the two polymer films to be quickly pressed on the surface of the copper net layer 3 through high pressure in a semi-molten state, and enabling the polymer films to penetrate through the copper net and be welded with opposite polymer films together through the high pressure state to form a conducting strip of the polymer material coated copper net layer 3;
s8, cooling and packaging: after high-temperature hot pressing, waiting for the product to be naturally cooled, and then packaging the product under the dustless condition.
Please refer to fig. 1 to 2, cover the copper mesh layer 3 by setting up two layers of polymer films, can make the copper mesh layer 3 and the polymer film layer closely cover together, will not be influenced when bending, compare with the traditional process, avoid the current passing back copper mesh layer 3 and the silver thick liquid between the phenomenon of striking sparks, greatly promote the safety of this electrode, and increased the antistatic agent in the polymer film, and the antistatic agent can give the polymer film layer with mild to moderate conductivity, thereby can prevent the accumulation of electrostatic charge on the goods, and also added the plasticizer, can increase the plasticity and the compliance of polymer film layer, reduce the brittleness, make this product easy machine-shaping.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (6)
1. The polymer electrothermal membrane electrode comprises a lower polymer membrane layer (1) and is characterized in that: the two sides of the lower polymer film layer (1) are both provided with a copper net layer (3), and the surface of the copper net layer (3) is provided with an upper polymer film layer (2).
2. The polymer electrothermal film electrode according to claim 1, wherein: go up polymer film layer (2), lower polymer film layer (1) and copper screen layer (3) from the top down and set gradually, go up polymer film layer (2), lower polymer film layer (1) and copper screen layer (3) whole and be the sandwich structure setting.
3. A production process of a polymer electrothermal membrane electrode is characterized by comprising the following steps: the production process comprises the following steps:
s1, preparing a polymer film raw material: preparing formula amounts of polyethylene, EVA, an antioxidant, a plasticizer, a stabilizer and an antistatic agent;
s2, mixing the raw materials: putting the polyethylene and the EVA into a mixer for mixing;
s3, drying raw materials: putting the polyethylene and EVA raw material particles into a dryer for drying for 1-2h, and taking out the dried raw material particles for later use;
s4, extrusion: putting the dried polyethylene and EVA raw materials into an extruder, and adding an antioxidant, a plasticizer, a stabilizer and an antistatic agent into the extruder;
s5, air cooling forming: synchronously feeding the film extruded by the extruder into a blow molding machine for cooling and molding to form a polymer film;
s6, providing a copper mesh layer (3): arranging a copper net layer (3) on two sides of the polymer film, and then covering a layer of polymer film on the upper end of the copper net layer (3);
s7, copper clad mesh layer (3): the method comprises the following steps that a copper net layer (3) is sandwiched between two polymer film layers, hot pressing is carried out through a hot press, the hot pressing temperature is set to be 160 ℃ for laminating, two polymer films are pressed on the surface of the copper net layer (3) through high pressure fast in a semi-molten state, and the polymer films penetrate through the copper net and are welded with opposite polymer films together in a high-pressure state to form a conducting strip of the polymer material coated copper net layer (3);
s8, cooling and packaging: after high-temperature hot pressing, waiting for the product to be naturally cooled, and then packaging the product under the dustless condition.
4. The production process of the polymer electrothermal membrane electrode according to claim 2, wherein: when the polyethylene and the EVA are mixed in the S2, the temperature in the mixer is kept at 50 ℃, the rotating speed of the mixer in the mixer is 60-100r/min, and the mixing time is 5-8 min.
5. The production process of the polymer electrothermal membrane electrode according to claim 2, wherein: the thickness of the polymer film formed in S5 was 0.05 MM.
6. The production process of the polymer electrothermal membrane electrode according to claim 2, wherein: the dosage of the stabilizer in the S4 is 0.2-0.5% of the raw materials of the polyethylene and the EVA.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111396912.1A CN114126112A (en) | 2021-11-23 | 2021-11-23 | Polymer electrothermal film electrode and production process thereof |
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| CN202111396912.1A CN114126112A (en) | 2021-11-23 | 2021-11-23 | Polymer electrothermal film electrode and production process thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090283511A1 (en) * | 2004-07-28 | 2009-11-19 | Kezheng Wang | Controllable electrothermal element of PTC thick film circuit |
| KR20110019893A (en) * | 2009-08-21 | 2011-03-02 | 강성민 | Plane heater having antistatic layer |
| CN108841022A (en) * | 2018-04-18 | 2018-11-20 | 句容沣润塑料制品有限公司 | The preparation method of plastic fresh-keeping membrane |
| CN213661985U (en) * | 2020-11-30 | 2021-07-09 | 贵州朝日供暖科技有限公司 | Flexible electric heating carbon film |
-
2021
- 2021-11-23 CN CN202111396912.1A patent/CN114126112A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090283511A1 (en) * | 2004-07-28 | 2009-11-19 | Kezheng Wang | Controllable electrothermal element of PTC thick film circuit |
| KR20110019893A (en) * | 2009-08-21 | 2011-03-02 | 강성민 | Plane heater having antistatic layer |
| CN108841022A (en) * | 2018-04-18 | 2018-11-20 | 句容沣润塑料制品有限公司 | The preparation method of plastic fresh-keeping membrane |
| CN213661985U (en) * | 2020-11-30 | 2021-07-09 | 贵州朝日供暖科技有限公司 | Flexible electric heating carbon film |
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Application publication date: 20220301 |