CN111019541A - Protective film for electrothermal film and preparation method thereof - Google Patents
Protective film for electrothermal film and preparation method thereof Download PDFInfo
- Publication number
- CN111019541A CN111019541A CN201910396585.6A CN201910396585A CN111019541A CN 111019541 A CN111019541 A CN 111019541A CN 201910396585 A CN201910396585 A CN 201910396585A CN 111019541 A CN111019541 A CN 111019541A
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- Prior art keywords
- film
- hot melt
- melt adhesive
- protective film
- eva hot
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/35—Heat-activated
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
Abstract
The invention provides a protective film for an electrothermal film, which comprises a PET (polyethylene terephthalate) film layer and an EVA (ethylene-vinyl acetate) hot melt adhesive layer; the protective film provided by the application can replace one layer of PET film, a manufacturer only needs to print heating elements such as conductive graphite on one layer of PET film in a screen printing or gravure manner, and then thermally compound the protective film provided by the application, so that strong adhesive force can be formed, the insulativity, the waterproofness and the peeling strength of the electrothermal film are improved, and the service life of the electrothermal film is prolonged; the invention also provides a preparation method of the protective film for the electrothermal film, which comprises the steps of melting the EVA hot melt adhesive and compounding the EVA hot melt adhesive on the PET film to obtain the protective film. The method can be completed only by pressure and heat, and has the advantages of zero emission, no pollution, high efficiency, simple operation and easy implementation.
Description
Technical Field
The invention relates to a protective film, in particular to a protective film for an electrothermal film and a preparation method thereof.
Background
The electric heating system is a high-quality comfortable environment-friendly heating mode for converting clean electric energy into heat energy, and long-term practical application proves that the electric heating system has incomparable advantages of a plurality of other heating modes and is accepted and accepted by more and more global users, and the electric heating film is a core element of the whole electric heating system and is a heating element of the system.
The electric heating film heating mode has the advantages of no water consumption, no land occupation, independent switch, energy conservation, material conservation and wide development prospect. Along with the appearance of the electric heating film, the electric heating film heating which is environment-friendly and economical is not only meant to be capable of rapidly entering thousands of households, but also is meant to be happy in the electric heating film heating industry, and is meant to be the coming of low-carbon development spring in the heating industry. The heating of the electric heating film mainly radiates heat in a radiation mode, belongs to low-temperature radiation, has transmissivity, and radiates and transfers heat energy indoors in an infrared ray mode.
The substrate of the electrothermal film sold on the market is a PET special polyester film, the heating element is special conductive ink, silver paste and graphene, the two PET films are bonded by adopting mixed glue, and the heating element is clamped between the two PET films; however, the electric heating film is poor in adhesive force and unstable, so that the insulativity and the stability of the electric heating film cannot be effectively maintained for a long time, and the service life of the electric heating film is short.
Disclosure of Invention
The invention aims to provide a protective film for an electrothermal film, wherein an electrothermal film manufacturer only needs to print heating elements such as conductive ink and the like on a common PET film in a screen printing or gravure printing mode, and then thermally compound the protective film provided by the invention to form strong adhesive force, so that the insulativity, the peel strength and the waterproofness of the electrothermal film are greatly increased, the quality of the electrothermal film is obviously improved, and the defects in the prior art are overcome.
In order to achieve the purpose, the invention provides the following technical scheme:
a protection film for electric heat membrane, includes PET thin layer and EVA hot melt adhesive layer.
Preferably, the thickness of the PET film layer is 70-80 μm.
Preferably, the thickness of the EVA hot melt adhesive layer is 45-55 μm.
The invention also provides a preparation method of the protective film, which comprises the following steps: and melting the EVA hot melt adhesive particles and compounding the molten EVA hot melt adhesive particles on the PET film to obtain the protective film.
Preferably, the compounding further comprises pressing into a roll.
Preferably, the melting temperature is 220-230 ℃, and the melting time is 1-2 min.
Preferably, the temperature of the compounding is 220-230 ℃.
Preferably, the particle size of the EVA hot melt adhesive particles is 2-3 mm.
The invention has the beneficial technical effects that:
the invention provides a protective film for an electrothermal film, which comprises a PET (polyethylene terephthalate) film layer and an EVA (ethylene-vinyl acetate) hot melt adhesive layer; the protective film provided by the application can replace one layer of PET film, a manufacturer only needs to print heating elements such as conductive graphite on one layer of PET film in a screen printing or gravure manner, and then thermally compound the protective film provided by the application, so that strong adhesive force can be formed, the insulativity, the waterproofness and the peeling strength of the electrothermal film are improved, and the service life of the electrothermal film is prolonged; the application the protection film be applied to the electric heat membrane in, peel strength reaches 7 ~ 8N, waterproof grade reaches more than IPX7, insulation resistance reaches 60 ~ 70M omega, has obtained better technological effect.
The invention also provides a preparation method of the protective film for the electrothermal film, which comprises the steps of melting the EVA hot melt adhesive and compounding the EVA hot melt adhesive on the PET film to obtain the protective film. The method can be completed only by pressure and heat, and has the advantages of zero emission, no pollution, high efficiency, simple operation and easy implementation.
Detailed Description
The invention provides a protective film for an electrothermal film, which comprises a PET film layer and an EVA hot melt adhesive layer.
In the invention, the thickness of the PET film layer is preferably 70-80 μm, and more preferably 73-78 μm; the invention has no special requirements on the source of the PET film, and the PET film with the thickness meeting the requirements is selected.
In the invention, the thickness of the EVA hot melt adhesive layer is preferably 45-55 μm, more preferably 48-52 μm, the EVA hot melt adhesive is granular, the grain size of the granules is preferably 2-3 mm, the source of the EVA hot melt adhesive has no special requirement, and the EVA hot melt adhesive sold on the market is selected.
The invention also provides a preparation method of the protective film for the electrothermal film, which comprises the following steps: and melting the EVA hot melt adhesive particles and compounding the molten EVA hot melt adhesive particles on the PET film to obtain the protective film.
According to the invention, firstly, EVA hot melt adhesive particles are conveyed into a machine barrel of the extrusion compounding machine for melting through a suction machine of the extrusion compounding machine, the melting temperature is preferably 220-230 ℃, and the melting time is 1-2 min until the EVA hot melt adhesive is completely melted into a liquid state and has good fluidity.
And extruding and compounding the molten liquid EVA hot melt adhesive on the surface of the PET film through a die head with a set thickness until an EVA hot melt adhesive layer with a thickness meeting the requirement is obtained, wherein the temperature during extrusion compounding is preferably 220-230 ℃, and more preferably 225 ℃.
And compounding the PET film layer surface to obtain an EVA hot melt adhesive layer, and then laminating the EVA hot melt adhesive layer into a coil through a forming roller to obtain the protective film for the electrothermal film.
In the invention, the melting and compounding of the EVA hot melt adhesive particles are carried out on an extrusion compounding machine, and the used equipment is the extrusion compounding machine manufactured by Jiangmen Ciilong plastics machinery Co.
The protective film and the method for producing the same according to the present invention will be described in detail with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1:
purchasing a PET film with the thickness of 75 microns and EVA hot melt adhesive particles from the market, conveying the EVA hot melt adhesive particles with the particle size of 2mm into a machine barrel through a suction machine of an extrusion compounding machine, heating and melting the EVA hot melt adhesive particles at the temperature of 222 ℃, and melting for 2min to completely melt the EVA hot melt adhesive into a liquid state until the EVA hot melt adhesive has good fluidity;
the molten EVA hot melt adhesive is extruded and coated on the surface of a PET film with the thickness of 75 mu m through a die head of an extrusion compounding machine (manufactured by Jiangmen Ciilong plastics mechanical Co., Ltd.), the extrusion coating temperature is 220 ℃, the extrusion is stopped until the thickness of the EVA hot melt adhesive is 50 mu m, the EVA hot melt adhesive layer is cooled to be solid, and finally, the EVA hot melt adhesive layer is pressed and coiled through a forming roller to obtain the protective film for the electrothermal film.
The peel strength, water resistance rating and insulation resistance of the protective film are detailed in table 1.
Example 2:
purchasing a PET film with the thickness of 72 mu m and EVA hot melt adhesive particles from the market, conveying the EVA hot melt adhesive particles with the particle size of 3mm into a machine barrel through a suction machine of an extrusion compounding machine, heating and melting the EVA hot melt adhesive particles at the temperature of 230 ℃ for 2min to completely melt the EVA hot melt adhesive into a liquid state until the EVA hot melt adhesive has good fluidity;
the molten EVA hot melt adhesive is extruded and coated on the surface of a PET film with the thickness of 75 mu m through a die head of an extrusion compounding machine (manufactured by Jiangmen Ciilong plastics mechanical Co., Ltd.), the extrusion coating temperature is 225 ℃, the extrusion is stopped until the thickness of the EVA hot melt adhesive is 47 mu m, the EVA hot melt adhesive layer is cooled to be solid, and finally, the EVA hot melt adhesive layer is pressed and coiled through a forming roller to obtain the protective film for the electrothermal film.
The peel strength, water resistance rating and insulation resistance of the protective film are detailed in table 1.
Example 3
Purchasing a PET film and EVA hot melt adhesive particles with the thickness of 78 micrometers from the market, conveying the EVA hot melt adhesive particles with the particle size of 2mm into a machine barrel through a suction machine of an extrusion spraying and coating machine, heating and melting the EVA hot melt adhesive particles at the temperature of 228 ℃, and melting for 2min to completely melt the EVA hot melt adhesive into a liquid state until the EVA hot melt adhesive has good fluidity;
the molten EVA hot melt adhesive is extruded and coated on the surface of a PET film with the thickness of 75 mu m through a die head of an extrusion compounding machine (manufactured by Jiangmen Ciilong plastics mechanical Co., Ltd.), the extrusion coating temperature is 224 ℃, the extrusion is stopped until the thickness of the EVA hot melt adhesive is 53 mu m, the EVA hot melt adhesive layer is cooled to be solid, and finally, the EVA hot melt adhesive layer is pressed and coiled through a forming roller to obtain the protective film for the electrothermal film.
The peel strength, water resistance rating and insulation resistance of the protective film are detailed in table 1.
TABLE 1
| Peel strength | Water resistance rating | Insulation resistance | |
| Example 1 | 7N | IPX7 | 62MΩ |
| Example 2 | 8N | IPX7 | 70MΩ |
| Example 3 | 7.8N | IPX7 | 68MΩ |
| Existing PET electrothermal film | 3N | IPX6 | 50MΩ |
By table 1 the result can know, this application special protection film of electric heat membrane, with its application behind the electric heat membrane, its peel strength is 7 ~ 8N, insulation resistance is 62 ~ 70M omega, waterproof grade reaches IPX7, all is superior to current PET electric heat membrane, has prolonged life, has satisfied the further needs in market.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A protection film for electric heat membrane, includes PET thin layer and EVA hot melt adhesive layer.
2. The protective film according to claim 1, wherein the thickness of the PET film layer is 70-80 μm.
3. The protective film according to claim 1, wherein the thickness of the EVA hot melt adhesive layer is 45-55 μm.
4. A method for producing the protective film according to any one of claims 1 to 3, comprising the steps of: and melting the EVA hot melt adhesive particles and compounding the molten EVA hot melt adhesive particles on the PET film to obtain the protective film.
5. The method for preparing a protective film according to claim 4, wherein the compounding further comprises laminating into a roll.
6. The method for preparing a protective film according to claim 4, wherein the melting temperature is 220 to 230 ℃ and the melting time is 1 to 2 min.
7. The method for preparing a protective film according to claim 4, wherein the temperature of the compounding is 220 to 230 ℃.
8. The preparation method of the protective film according to claim 4, wherein the particle size of the EVA hot melt adhesive particles is 2-3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910396585.6A CN111019541A (en) | 2019-05-07 | 2019-05-07 | Protective film for electrothermal film and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910396585.6A CN111019541A (en) | 2019-05-07 | 2019-05-07 | Protective film for electrothermal film and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111019541A true CN111019541A (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910396585.6A Pending CN111019541A (en) | 2019-05-07 | 2019-05-07 | Protective film for electrothermal film and preparation method thereof |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111712003A (en) * | 2020-06-29 | 2020-09-25 | 佛山(华南)新材料研究院 | Low-voltage infrared electrothermal film and preparation method thereof |
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| CN104449046A (en) * | 2014-12-09 | 2015-03-25 | 上海宥拓化学有限公司 | Conductive ink and application thereof |
| CN104602372A (en) * | 2014-12-09 | 2015-05-06 | 上海宥拓化学有限公司 | Low-temperature radiation electro-thermal film |
| CN204569797U (en) * | 2014-12-19 | 2015-08-19 | 北京康得新功能材料有限公司 | A kind of thermoprint and hot transfer printing pre-coating film |
| CN109228373A (en) * | 2018-08-20 | 2019-01-18 | 扬州市众和同盛包装材料有限公司 | A kind of preparation process of PET electric heating nanometer film |
| CN109280425A (en) * | 2018-11-02 | 2019-01-29 | 杭州超探新材料科技有限公司 | A kind of preparation method of floor heating electric hot plate |
| CN208675563U (en) * | 2018-06-15 | 2019-03-29 | 戴宁 | Carbon heat source composite membrane |
-
2019
- 2019-05-07 CN CN201910396585.6A patent/CN111019541A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104449046A (en) * | 2014-12-09 | 2015-03-25 | 上海宥拓化学有限公司 | Conductive ink and application thereof |
| CN104602372A (en) * | 2014-12-09 | 2015-05-06 | 上海宥拓化学有限公司 | Low-temperature radiation electro-thermal film |
| CN204569797U (en) * | 2014-12-19 | 2015-08-19 | 北京康得新功能材料有限公司 | A kind of thermoprint and hot transfer printing pre-coating film |
| CN208675563U (en) * | 2018-06-15 | 2019-03-29 | 戴宁 | Carbon heat source composite membrane |
| CN109228373A (en) * | 2018-08-20 | 2019-01-18 | 扬州市众和同盛包装材料有限公司 | A kind of preparation process of PET electric heating nanometer film |
| CN109280425A (en) * | 2018-11-02 | 2019-01-29 | 杭州超探新材料科技有限公司 | A kind of preparation method of floor heating electric hot plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111712003A (en) * | 2020-06-29 | 2020-09-25 | 佛山(华南)新材料研究院 | Low-voltage infrared electrothermal film and preparation method thereof |
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