CN114381216A - Thermochromic adhesive tape and preparation method thereof - Google Patents

Thermochromic adhesive tape and preparation method thereof Download PDF

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Publication number
CN114381216A
CN114381216A CN202111521352.8A CN202111521352A CN114381216A CN 114381216 A CN114381216 A CN 114381216A CN 202111521352 A CN202111521352 A CN 202111521352A CN 114381216 A CN114381216 A CN 114381216A
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parts
layer
adhesive tape
sensitive adhesive
tert
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周玉波
邹学良
陈玲
陈洪野
吴小平
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Cybrid Technologies Inc
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Cybrid Technologies Inc
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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
    • C09J7/29—Laminated material
    • 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
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • 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
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • 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
    • C09J121/00—Adhesives based on unspecified rubbers
    • 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
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • 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
    • C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
    • 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
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • 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
    • C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
    • C09J183/04—Polysiloxanes
    • 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
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • 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
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/385—Acrylic polymers
    • 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
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
    • 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
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
    • C09J2301/162—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer the carrier being a laminate constituted by plastic layers only
    • 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
    • C09J2301/302—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 pressure-sensitive, i.e. 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
    • C09J2423/10—Presence of homo or copolymers of propene
    • C09J2423/106—Presence of homo or copolymers of propene in the substrate
    • 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
    • C09J2427/00—Presence of halogenated polymer
    • C09J2427/006—Presence of halogenated polymer in the substrate
    • 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

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Adhesive Tapes (AREA)

Abstract

The invention discloses a thermochromic adhesive tape, which comprises a substrate layer, a permeable layer, a porous film, a coloring layer and a release layer from top to bottom in sequence, wherein the permeable layer comprises a polymer pressure-sensitive adhesive and a crystalline material, the crystalline material is dispersed in the polymer pressure-sensitive adhesive, the crystalline material can permeate into the porous film after being heated and melted to enable the porous film to become transparent and display the color of the coloring layer, the permeable layer is obtained by drying permeable layer glue, and the permeable layer glue consists of the following components in parts by weight: 100 parts of high-molecular pressure-sensitive adhesive, 20-100 parts of crystalline material, 0.1-5 parts of antioxidant, 0.1-2 parts of 6- (2-benzotriazole) -4-tert-octyl-6-tert-butyl-4-methyl-2, 2' -methylene bisphenol and 0.1-1 part of hexamethylene diisocyanate. The adhesive tape has a color changing function, is sensitive to temperature, and can monitor the temperature of a working environment in time; the adhesive tape is stable in viscosity, cannot generate large fluctuation along with the change of temperature, and cannot influence the use even if the temperature rises.

Description

Thermochromic adhesive tape and preparation method thereof
Technical Field
The invention belongs to the technical field of adhesive tapes, and particularly relates to a thermochromic adhesive tape and a preparation method thereof.
Background
In a photovoltaic power plant, cables and connectors are relied upon to bring together the power of a large number of components into an inverter. The photovoltaic connector is a key part for connecting components in a photovoltaic power generation system, a header box, a controller, an inverter and the like. The voltage of a direct current side in the whole photovoltaic system is usually over 1000V, and once a joint of a photovoltaic assembly is loosened and the contact is poor, the direct current arc discharge phenomenon is easily caused. The direct current arc discharge can cause the temperature of the contact part to rise rapidly, the continuous arc can generate the high temperature of 1000-! Therefore, the thermochromic adhesive tape is coated on the photovoltaic connector to play a role in monitoring the temperature.
The color change temperature of the existing thermochromic adhesive tape is above 80 ℃, the normal working temperature of the photovoltaic connector is below 40 ℃, and the possibility of untimely temperature monitoring exists when the previously used thermochromic adhesive tape is used.
Disclosure of Invention
The invention aims to provide a thermochromic adhesive tape which has a color changing function, is sensitive to temperature and can monitor the temperature of a working environment in time.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a thermochromism sticky tape, the sticky tape is from last to lower in proper order including substrate layer, permeable formation, porous membrane, dyed layer and release layer, the permeable formation includes polymer pressure sensitive adhesive and crystalline material, crystalline material disperses in the polymer pressure sensitive adhesive, and crystalline material can permeate into the porous membrane after being heated the melting, makes the porous membrane become transparent and demonstrate the colour of dyed layer.
The technical scheme of further improvement in the technical scheme is as follows:
1. in the above scheme, the permeable layer is obtained by drying permeable layer glue, and the permeable layer glue is composed of the following components in parts by weight: 100 parts of high-molecular pressure-sensitive adhesive, 20-100 parts of crystalline material, 0.1-5 parts of antioxidant, 0.1-2 parts of 6- (2-benzotriazole) -4-tert-octyl-6-tert-butyl-4-methyl-2, 2' -methylene bisphenol and 0.1-1 part of hexamethylene diisocyanate;
the high-molecular pressure-sensitive adhesive is one of rubber, acrylic resin, polyurethane, silica gel and polyester, and can not react with the crystalline material.
2. In the scheme, the crystalline material is any one or more of paraffin, polyethylene wax, stearic acid, palmitic acid, myristic acid, dicyclohexyl phthalate, lauric acid, microcrystalline wax and synthetic ester wax, and the melting point of the crystalline material is 40-70 ℃.
3. In the above scheme, the colored layer comprises a polymer pressure sensitive adhesive and an inorganic pigment, wherein the inorganic pigment is dispersed in the polymer pressure sensitive adhesive, the colored layer is obtained by drying colored layer glue, and the colored layer glue consists of the following components in parts by weight: 100 parts of high-molecular pressure-sensitive adhesive, 1-30 parts of inorganic pigment, 0.1-5 parts of antioxidant, 0.1-2 parts of 6- (2-benzotriazole) -4-tert-octyl-6-tert-butyl-4-methyl-2, 2' -methylene bisphenol and 0.1-1 part of hexamethylene diisocyanate.
4. In the scheme, the antioxidant adopts an antioxidant 1010.
5. In the above scheme, the substrate is PET or PVDF.
6. In the scheme, the thickness of the permeation layer is 5-100 μm.
7. In the above embodiment, the porous membrane is an opaque or white PP porous membrane, and has a thickness of 5 to 100 μm.
8. In the scheme, the thickness of the coloring layer is 20-600 μm.
The other technical scheme of the invention is as follows: a preparation method of a thermochromic adhesive tape comprises the following steps:
s1, preparing osmotic layer glue: adding 100 parts of high-molecular pressure-sensitive adhesive, 20-100 parts of crystalline material, 0.1-5 parts of antioxidant, 0.1-2 parts of 6- (2-benzotriazole) -4-tert-octyl-6-tert-butyl-4-methyl-2, 2' -methylene bisphenol and 0.1-1 part of hexamethylene diisocyanate into a stirring kettle, and stirring for 1-2 hours at the rotating speed of 200RPM to obtain permeable layer glue;
s2, preparing coloring layer glue: 100 parts of high-molecular pressure-sensitive adhesive, 1-30 parts of inorganic pigment, 0.1-5 parts of antioxidant, 0.1-2 parts of 6- (2-benzotriazole) -4-tert-octyl-6-tert-butyl-4-methyl-2, 2' -methylene bisphenol and 0.1-1 part of hexamethylene diisocyanate are added into a stirring kettle and stirred for 1-2 hours at the rotating speed of 200RPM to obtain coloring layer glue;
s3, coating the colored layer glue obtained in the step S2 on the release layer, and bonding the colored layer glue with the porous film after high-temperature drying;
and S4, coating the permeable layer glue obtained in the step S1 on a substrate layer, drying at high temperature, and attaching the permeable layer glue to the other side of the porous film to obtain the thermochromic adhesive tape.
The technical scheme of further improvement in the technical scheme is as follows:
1. in the scheme, the oven temperature in the steps S3 and S4 is 100 ℃, and the time is 3 min.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. according to the thermochromic adhesive tape, the permeable layer containing the crystalline material and the coloring layer containing the inorganic pigment are respectively arranged on the two sides of the porous film, the permeable layer and the coloring layer are matched with the porous film to enable the adhesive tape to have a color changing function, the adhesive tape is sensitive to temperature, and the temperature of a working environment can be monitored in time; the adhesive tape is stable in viscosity, cannot generate large fluctuation along with the change of temperature, and cannot influence the use even if the temperature rises.
2. The thermochromic adhesive tape disclosed by the invention has the advantages that the condition of color change can not occur at the normal working temperature of the photovoltaic connector, namely 40 ℃ or below, the color change phenomenon can be very sensitively caused when the temperature reaches 45 ℃, the temperature sensing is very accurate, and the working environment of the photovoltaic connector can be conveniently monitored.
Detailed Description
In the description of this patent, it is noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.
The invention is further described below with reference to the following examples:
a thermochromism adhesive tape comprises a base material layer, a permeable layer, a porous film, a coloring layer and a release layer in sequence from top to bottom, wherein the permeable layer comprises a high-molecular pressure-sensitive adhesive and a crystalline material, the crystalline material is dispersed in the high-molecular pressure-sensitive adhesive, and the crystalline material can permeate into the porous film after being heated and melted so that the porous film becomes transparent and displays the color of the coloring layer;
the permeable formation is dried by permeable formation glue and is obtained, the dyed layer is dried by dyed layer glue and is obtained, and this permeable formation glue and dyed layer glue comprise following parts by weight component, as shown in table 1:
TABLE 1
Figure BDA0003407568200000031
Figure BDA0003407568200000041
In the embodiment 1, the macromolecular pressure-sensitive adhesive of the permeable layer is rubber, and the crystalline material is paraffin; the macromolecular pressure-sensitive adhesive of the coloring layer is acrylic resin; the thickness of the permeable layer is 5 μm, the porous membrane is an opaque PP porous membrane, the thickness of the porous membrane is 5 μm, and the thickness of the coloring layer is 20 μm.
Example 2 the polymeric pressure sensitive adhesive of the permeable layer is acrylic resin and the crystalline material is palmitic acid; the macromolecular pressure-sensitive adhesive of the coloring layer is acrylic resin; the thickness of the permeable layer is 10 μm, the porous membrane is a white PP porous membrane, the thickness of the porous membrane is 25 μm, and the thickness of the coloring layer is 100 μm.
In the embodiment 3, the macromolecule pressure-sensitive adhesive of the permeable layer is made of polyurethane, and the crystalline material is dicyclohexyl phthalate; the macromolecular pressure-sensitive adhesive of the coloring layer is polyurethane; the thickness of the permeation layer is 20 μm, the porous film is a white PP porous film, the thickness of the porous film is 50 μm, and the thickness of the coloring layer is 100 μm.
In example 4, the polymeric pressure sensitive adhesive of the osmotic layer was silica gel and the crystalline material was myristic acid; the macromolecular pressure-sensitive adhesive of the coloring layer is acrylic resin; the thickness of the permeation layer is 50 μm, the porous membrane is a white PP porous membrane, the thickness of the porous membrane is 75 μm, and the thickness of the coloring layer is 200 μm.
In example 5, the polymeric pressure sensitive adhesive of the osmotic layer was selected from polyester and the crystalline material was selected from lauric acid; the macromolecular pressure-sensitive adhesive of the coloring layer is polyester; the thickness of the permeable layer is 100 μm, the porous membrane is an opaque PP porous membrane, the thickness of the porous membrane is 100 μm, and the thickness of the coloring layer is 500 μm.
The preparation method of the thermochromic adhesive tape comprises the following steps:
s1, preparing osmotic layer glue: adding 100 parts of high-molecular pressure-sensitive adhesive, 20-100 parts of crystalline material, 0.1-5 parts of antioxidant, 0.1-2 parts of 6- (2-benzotriazole) -4-tert-octyl-6-tert-butyl-4-methyl-2, 2' -methylene bisphenol and 0.1-1 part of hexamethylene diisocyanate into a stirring kettle, and stirring for 2 hours at the rotating speed of 200RPM to obtain permeable layer glue;
s2, preparing coloring layer glue: 100 parts of high-molecular pressure-sensitive adhesive, 1-30 parts of inorganic pigment, 0.1-5 parts of antioxidant, 0.1-2 parts of 6- (2-benzotriazole) -4-tert-octyl-6-tert-butyl-4-methyl-2, 2' -methylene bisphenol and 0.1-1 part of hexamethylene diisocyanate are added into a stirring kettle and stirred for 1 hour at the rotating speed of 200RPM to obtain coloring layer glue;
s3, coating the colored layer glue obtained in the step S2 on the release layer, drying at high temperature, and then attaching the colored layer glue to the porous membrane, wherein the temperature of an oven is 100 ℃ and the time is 3 min;
and S4, coating the permeable layer glue obtained in the step S1 on a substrate layer, drying at high temperature, and attaching the permeable layer glue to the other side of the porous film to obtain the thermochromic adhesive tape, wherein the drying oven temperature is 100 ℃ and the time is 3 min.
Comparative examples 1 and 2 are the same as examples 1 and 2.
The properties of the tapes obtained in examples 1 to 5 and comparative examples 1 to 2 are shown in Table 2:
TABLE 3
Figure BDA0003407568200000051
As shown in the evaluation results of Table 2, the example thermochromic adhesive tapes are stable in discoloration, while comparative example 1 is unable to show discoloration, and comparative example 2 is unstable in discoloration and shows discoloration at low temperature; therefore, the adhesive tape of the invention can not change color at the normal working temperature of the photovoltaic connector, namely 40 ℃ or below, and can sensitively change color when the temperature reaches 45 ℃, thereby being convenient for monitoring the working environment of the photovoltaic connector.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (10)

1. A thermochromic adhesive tape, characterized in that: the sticky tape is from last to having proper order down including substrate layer, permeable formation, porous membrane, dyed layer and release layer, the permeable formation includes polymer pressure sensitive adhesive and crystalline material, crystalline material disperses in the polymer pressure sensitive adhesive, and crystalline material can permeate into the porous membrane after being heated the melting, makes the porous membrane become transparent the colour that shows the dyed layer.
2. The thermochromic adhesive tape according to claim 1, wherein: the permeable layer is obtained by drying permeable layer glue, and the permeable layer glue comprises the following components in parts by weight: 100 parts of high-molecular pressure-sensitive adhesive, 20-100 parts of crystalline material, 0.1-5 parts of antioxidant, 0.1-2 parts of 6- (2-benzotriazole) -4-tert-octyl-6-tert-butyl-4-methyl-2, 2' -methylene bisphenol and 0.1-1 part of hexamethylene diisocyanate;
the high-molecular pressure-sensitive adhesive is one of rubber, acrylic resin, polyurethane, silica gel and polyester, and can not react with the crystalline material.
3. The thermochromic adhesive tape according to claim 2, wherein: the crystallization material is any one or more of paraffin, polyethylene wax, stearic acid, palmitic acid, myristic acid, dicyclohexyl phthalate, lauric acid, microcrystalline wax and synthetic ester wax, and the melting point of the crystallization material is 40-70 ℃.
4. Thermochromic adhesive tape according to any of claim 1, characterized in that: the colored layer comprises a polymer pressure-sensitive adhesive and an inorganic pigment, wherein the inorganic pigment is dispersed in the polymer pressure-sensitive adhesive, the colored layer is obtained by drying colored layer glue, and the colored layer glue consists of the following components in parts by weight: 100 parts of high-molecular pressure-sensitive adhesive, 1-30 parts of inorganic pigment, 0.1-5 parts of antioxidant, 0.1-2 parts of 6- (2-benzotriazole) -4-tert-octyl-6-tert-butyl-4-methyl-2, 2' -methylene bisphenol and 0.1-1 part of hexamethylene diisocyanate.
5. The thermochromic adhesive tape according to any one of claims 1 to 4, wherein: the base material is PET or PVDF.
6. The thermochromic adhesive tape according to any one of claims 1 to 4, wherein: the thickness of the permeable layer is 5-100 μm.
7. The thermochromic adhesive tape according to any one of claims 1 to 4, wherein: the porous membrane is an opaque or white PP porous membrane with the thickness of 5-100 μm.
8. The thermochromic adhesive tape according to any one of claims 1 to 4, wherein: the thickness of the coloring layer is 20-600 μm.
9. A method for preparing the thermochromic adhesive tape of claim 1, wherein: the method comprises the following steps:
s1, preparing osmotic layer glue: adding 100 parts of high-molecular pressure-sensitive adhesive, 20-100 parts of crystalline material, 0.1-5 parts of antioxidant, 0.1-2 parts of 6- (2-benzotriazole) -4-tert-octyl-6-tert-butyl-4-methyl-2, 2' -methylene bisphenol and 0.1-1 part of hexamethylene diisocyanate into a stirring kettle, and stirring for 1-2 hours at the rotating speed of 200RPM to obtain permeable layer glue;
s2, preparing coloring layer glue: 100 parts of high-molecular pressure-sensitive adhesive, 1-30 parts of inorganic pigment, 0.1-5 parts of antioxidant, 0.1-2 parts of 6- (2-benzotriazole) -4-tert-octyl-6-tert-butyl-4-methyl-2, 2' -methylene bisphenol and 0.1-1 part of hexamethylene diisocyanate are added into a stirring kettle and stirred for 1-2 hours at the rotating speed of 200RPM to obtain coloring layer glue;
s3, coating the colored layer glue obtained in the step S2 on the release layer, and bonding the colored layer glue with the porous film after high-temperature drying;
and S4, coating the permeable layer glue obtained in the step S1 on a substrate layer, drying at high temperature, and attaching the permeable layer glue to the other side of the porous film to obtain the thermochromic adhesive tape.
10. The method of preparing thermochromic adhesive tape according to claim 9, wherein: the oven temperature in the steps S3 and S4 is 100 ℃, and the time is 3 min.
CN202111521352.8A 2021-12-13 2021-12-13 Thermochromic adhesive tape and preparation method thereof Pending CN114381216A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110343479A (en) * 2019-07-23 2019-10-18 新纶科技（常州）有限公司 A kind of non-flammable adhesive tape and preparation method thereof with high-temperature discoloration warning function
CN111295574A (en) * 2017-11-07 2020-06-16 3M创新有限公司 Temperature indicating composite material product and preparation method and application thereof
CN112571880A (en) * 2020-11-12 2021-03-30 苏州赛伍应用技术股份有限公司 Electronic paper transparent plastic front panel and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111295574A (en) * 2017-11-07 2020-06-16 3M创新有限公司 Temperature indicating composite material product and preparation method and application thereof
CN110343479A (en) * 2019-07-23 2019-10-18 新纶科技（常州）有限公司 A kind of non-flammable adhesive tape and preparation method thereof with high-temperature discoloration warning function
CN112571880A (en) * 2020-11-12 2021-03-30 苏州赛伍应用技术股份有限公司 Electronic paper transparent plastic front panel and preparation method thereof

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