CN113502130A - Double-sided adhesive tape and preparation method thereof - Google Patents
Double-sided adhesive tape and preparation method thereof Download PDFInfo
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- CN113502130A CN113502130A CN202110862778.3A CN202110862778A CN113502130A CN 113502130 A CN113502130 A CN 113502130A CN 202110862778 A CN202110862778 A CN 202110862778A CN 113502130 A CN113502130 A CN 113502130A
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- silica gel
- viscosity
- parts
- double
- coating
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- 239000002390 adhesive tape Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000000741 silica gel Substances 0.000 claims abstract description 56
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 56
- 239000011248 coating agent Substances 0.000 claims abstract description 54
- 238000000576 coating method Methods 0.000 claims abstract description 54
- 239000003292 glue Substances 0.000 claims abstract description 50
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 33
- 239000010703 silicon Substances 0.000 claims abstract description 33
- 229920002799 BoPET Polymers 0.000 claims abstract description 29
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 229920002313 fluoropolymer Polymers 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 6
- 239000011737 fluorine Substances 0.000 claims abstract description 6
- 239000002985 plastic film Substances 0.000 claims abstract description 6
- 229920006255 plastic film Polymers 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 5
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 18
- 239000003960 organic solvent Substances 0.000 claims description 14
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 12
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 12
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 11
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 11
- 239000001257 hydrogen Substances 0.000 claims description 11
- 229910052739 hydrogen Inorganic materials 0.000 claims description 11
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 11
- 229920002545 silicone oil Polymers 0.000 claims description 11
- 229920001296 polysiloxane Polymers 0.000 claims description 9
- DSVRVHYFPPQFTI-UHFFFAOYSA-N bis(ethenyl)-methyl-trimethylsilyloxysilane;platinum Chemical compound [Pt].C[Si](C)(C)O[Si](C)(C=C)C=C DSVRVHYFPPQFTI-UHFFFAOYSA-N 0.000 claims description 8
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 6
- 229920002554 vinyl polymer Polymers 0.000 claims description 6
- 239000013464 silicone adhesive Substances 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract description 14
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract description 14
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 238000005303 weighing Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000007719 peel strength test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- 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
- C09J7/20—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
- 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
- C09J2301/124—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 on both sides of the carrier, e.g. double-sided adhesive tape
- C09J2301/1242—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 on both sides of the carrier, e.g. double-sided adhesive tape the opposite adhesive layers being different
-
- 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
- C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
- C09J2301/208—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
-
- 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
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a double-sided adhesive tape and a preparation method thereof, and the method comprises the steps of measuring high-viscosity silica gel water, modified high-viscosity silica gel water and base coating glue, and sequentially filtering for later use; uniformly coating high-viscosity silica gel water on the first surface of the PET film, and heating to complete the first curing; attaching the first fluoroplastic film to the first surface coated with the high-viscosity silicon glue; uniformly coating the first-coating glue on the first surface of the PET film, and heating to complete the first curing; uniformly coating the modified high-viscosity silicon glue on the second surface of the PET film coated with the base coating glue, heating and drying, and continuing to heat to finish third curing; attaching the second fluorine plastic film to the second surface coated with the modified high-viscosity silicon glue; the double-sided adhesive tape is prepared by the method and comprises a first fluoroplastic film layer, a high-viscosity silica gel layer, a PET film layer, a bottom coating, a modified high-viscosity silica gel layer and a second fluoroplastic film layer which are tightly attached in sequence. The invention ensures that the double-sided adhesive tape can firmly adhere to the polytetrafluoroethylene.
Description
Technical Field
The invention relates to a double-sided adhesive tape and a preparation method thereof, and belongs to the technical field of double-sided adhesive tapes.
Background
Polytetrafluoroethylene, commonly known as "plastic king", is a high molecular compound formed by polymerizing tetrafluoroethylene, and has excellent chemical stability, corrosion resistance, sealing property, high lubrication non-adhesiveness, electrical insulation property and good ageing resistance. Therefore, the polytetrafluoroethylene is widely applied to the fields of national defense and military industry, atomic energy, petroleum, radio, electric power machinery, chemical industry and the like.
The adhesive tape can be divided into a high-temperature adhesive tape, a double-sided adhesive tape, an insulating adhesive tape, a special adhesive tape, a pressure-sensitive adhesive tape and a die-cutting adhesive tape according to the effects of the adhesive tape, the adhesive tapes with different effects are suitable for different industrial requirements, and the adhesive tape which can be provided in the market at present can be used for the framework bonding of various materials such as metal, plastic, glass, ceramic and the like, and also has wide application in the electronic field, such as the double-sided adhesive tape used for bonding other components on a mainboard such as PFC (power factor correction) or PBC and the like.
However, polytetrafluoroethylene has an ultra-low surface property, and the conventional common double-sided tape is difficult to adhere to the surface of polytetrafluoroethylene, so that the polytetrafluoroethylene and the tape are poor in effect when combined for use, and the application cost of polytetrafluoroethylene is increased. In order to reduce the application cost of polytetrafluoroethylene, a double-sided adhesive capable of firmly adhering to polytetrafluoroethylene is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a double-sided adhesive tape and a preparation method thereof, so that the double-sided adhesive tape has high initial adhesion and viscosity, and polytetrafluoroethylene and a PC board are firmly adhered.
In order to achieve the above objects, in one aspect, the present invention provides a double-sided tape and a method for preparing the same, comprising the steps of:
measuring high-viscosity silica gel water, modified high-viscosity silica gel water and bottom coating glue, and sequentially filtering for later use;
uniformly coating high-viscosity silica gel water on the first surface of the PET film, and heating to complete the first curing;
attaching the first fluoroplastic film to the first surface coated with the high-viscosity silicon glue;
uniformly coating the first-coating glue on the first surface of the PET film, and heating to complete the first curing;
uniformly coating the modified high-viscosity silicon glue on the second surface of the PET film coated with the base coating glue, heating and drying, and continuing to heat to finish third curing;
attaching the second fluorine plastic film to the second surface coated with the modified high-viscosity silicon glue;
the steps are all finished in a dust-free room.
Further, the high-viscosity silicon glue comprises the following components: 80-100 parts of vinyl polysiloxane, 50-80 parts of methyl vinyl MQ resin, 1-3 parts of hydrogen-containing silicone oil, 1-2 parts of amino silane coupling agent, 1-2 parts of divinyl tetramethyl disiloxane platinum-gold complex and 100-200 parts of organic solvent.
Further, the coating thickness of the high-viscosity silicon glue is 10 +/-0.5 mu m.
Further, the modified high-viscosity silicon glue comprises the following components: 50-150 parts of organic silicon pressure-sensitive adhesive, 1-10 parts of Benzoyl Peroxide (BPO) and 20-50 parts of toluene.
Further, the coating thickness of the modified high-viscosity silicon glue is 50 +/-0.5 mu m.
Further, the drying temperature is 80-90 ℃; the temperature of the third curing is 170-200 ℃.
Further, the primer glue comprises the following components: 80-100 parts of primer solution, 1-2 parts of hydrogen-containing silicone oil, 0.5-1 part of amino silane coupling agent, 1-2 parts of divinyl tetramethyl disiloxane platinum complex and 200-300 parts of organic solvent.
Further, the coating thickness of the primer glue is 0.5 +/-0.2 mu m.
On the other hand, the invention provides a double-sided silica gel adhesive tape, which is prepared by adopting the preparation method of the double-sided silica gel adhesive tape; the coating comprises a first fluoroplastic film layer, a high-viscosity silica gel layer, a PET film layer, a bottom coating, a modified high-viscosity silica gel layer and a second fluoroplastic film layer which are tightly attached in sequence.
Further, the thickness of the first fluoroplastic film layer and the thickness of the second fluoroplastic film layer are both 25 +/-0.5 microns;
the thickness of the high-viscosity silica gel layer is 10 +/-0.5 mu m;
the thickness of the PET film layer is 25 +/-0.5 mu m;
the thickness of the bottom coating is 0.5 +/-0.2 mu m;
the thickness of the modified high-viscosity silica gel layer is 50 +/-0.5 mu m.
Compared with the prior art, the invention has the following beneficial effects:
the first surface of the PET film is uniformly coated with the high-viscosity silicon glue, so that the manufactured double-sided adhesive tape can firmly adhere to the PC board; the first coating of the base coating glue is firstly carried out, and then the modified high-viscosity silica gel is coated, so that the modified high-viscosity silica gel can be better cured on the second surface of the PET film; and curing the modified high-viscosity silica gel into a modified high-viscosity silica gel layer by two-time stepwise temperature rise, so that the prepared double-sided adhesive can firmly adhere to the polytetrafluoroethylene.
The polytetrafluoroethylene can be firmly adhered by preparing the double-sided adhesive tape comprising the first fluoroplastic film layer, the high-viscosity silica gel layer, the PET film layer, the bottom coating, the modified high-viscosity silica gel layer and the second fluoroplastic film layer.
Detailed Description
The invention is further described below. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
Preparing high-viscosity silicon glue:
weighing 80 parts by weight of vinyl polysiloxane, 50 parts by weight of methyl vinyl MQ resin, 1 part by weight of hydrogen-containing silicone oil, 1 part by weight of amino silane coupling agent, 1 part by weight of divinyl tetramethyl disiloxane platinum complex and 100 parts by weight of organic solvent, sequentially putting into a reaction kettle, uniformly stirring, and filtering for later use.
Preparing modified high-viscosity silicon glue:
weighing 50 parts by weight of organic silicon pressure-sensitive adhesive, 1 part by weight of Benzoyl Peroxide (BPO) and 20 parts by weight of toluene, sequentially putting the materials into a reaction kettle, uniformly stirring, and filtering for later use.
Preparing base coating glue:
weighing 80 parts by weight of primer solution, 1 part by weight of hydrogen-containing silicone oil, 0.5 part by weight of amino silane coupling agent, 1 part by weight of divinyl tetramethyl disiloxane platinum complex and 200 parts by weight of organic solvent, sequentially putting into a reaction kettle, uniformly stirring, and filtering for later use.
Preparing a double-sided adhesive tape:
the following processes are all completed in a clean room.
Preparing a PET film layer with the thickness of 25 +/-0.5 mu m, wherein the two fluoroplastic film layers with the thickness of 25 +/-0.5 mu m are prepared;
and uniformly coating the high-viscosity silica gel water on the first surface of the PET film, and heating and curing after the coating thickness is 10 +/-0.5 mu m.
Attaching the first fluoroplastic film to the first surface coated with the high-viscosity silicon glue;
and uniformly coating the second surface of the PET film with the primer glue, heating and curing after the coating thickness II is 0.5 +/-0.2 mu m.
And uniformly coating the modified high-viscosity silica gel on the second surface of the PET film coated with the primer glue, heating to 80 ℃ after the coating thickness is three to 50 +/-0.5 mu m, evaporating the organic solvent in the modified high-viscosity silica gel, and heating to 175 ℃ to finish curing.
And (3) attaching the second fluorine plastic film to the second surface coated with the modified high-viscosity silicon glue, namely finishing the manufacture of the double-sided adhesive tape, wherein the peel strength detection result of the adhesive tape is shown in table 1.
Example 2
Preparing high-viscosity silicon glue:
weighing 90 parts by weight of vinyl polysiloxane, 65 parts by weight of methyl vinyl MQ resin, 2 parts by weight of hydrogen-containing silicone oil, 1.5 parts by weight of amino silane coupling agent, 1.5 parts by weight of divinyl tetramethyl disiloxane platinum complex and 150 parts by weight of organic solvent, sequentially putting into a reaction kettle, stirring uniformly, and filtering for later use.
Preparing modified high-viscosity silicon glue:
weighing 100 parts by weight of organic silicon pressure-sensitive adhesive, 5 parts by weight of Benzoyl Peroxide (BPO) and 35 parts by weight of toluene, sequentially putting the materials into a reaction kettle, uniformly stirring, and filtering for later use.
Preparing base coating glue:
weighing 90 parts by weight of primer solution, 1.5 parts by weight of hydrogen-containing silicone oil, 0.7 part by weight of amino silane coupling agent, 1.5 parts by weight of divinyl tetramethyl disiloxane platinum complex and 200 parts by weight of organic solvent, sequentially putting into a reaction kettle, uniformly stirring, and filtering for later use.
Preparing a double-sided adhesive tape:
the following processes are all completed in a clean room.
Preparing a PET film layer with the thickness of 25 +/-0.5 mu m, wherein the two fluoroplastic film layers with the thickness of 25 +/-0.5 mu m are prepared;
and uniformly coating the high-viscosity silica gel water on the first surface of the PET film, and heating and curing after the coating thickness is 10 +/-0.5 mu m.
Attaching the first fluoroplastic film to the first surface coated with the high-viscosity silicon glue;
and uniformly coating the second surface of the PET film with the primer glue, and heating and curing after the coating thickness II is 0.5 +/-0.2 mu.
And uniformly coating the modified high-viscosity silica gel on the second surface of the PET film coated with the primer glue, heating to 80 ℃ after the coating thickness is three to 50 +/-0.5 mu m, evaporating the organic solvent in the modified high-viscosity silica gel, and heating to 185 ℃, thereby finishing the curing.
And (3) attaching the second fluorine plastic film to the second surface coated with the modified high-viscosity silicon glue, namely finishing the manufacture of the double-sided adhesive tape, wherein the peel strength detection result of the adhesive tape is shown in table 1.
Example 3
Preparing high-viscosity silicon glue:
weighing 100 parts by weight of vinyl polysiloxane, 80 parts by weight of methyl vinyl MQ resin, 3 parts by weight of hydrogen-containing silicone oil, 2 parts by weight of amino silane coupling agent, 2 parts by weight of divinyl tetramethyl disiloxane platinum complex and 200 parts by weight of organic solvent, sequentially putting into a reaction kettle, uniformly stirring, and filtering for later use.
Preparing modified high-viscosity silicon glue:
weighing 150 parts by weight of organic silicon pressure-sensitive adhesive, 10 parts by weight of Benzoyl Peroxide (BPO) and 50 parts by weight of toluene, sequentially putting the materials into a reaction kettle, uniformly stirring, and filtering for later use.
Preparing base coating glue:
weighing 100 parts by weight of primer solution, 2 parts by weight of hydrogen-containing silicone oil, 1 part by weight of amino silane coupling agent, 2 parts by weight of divinyl tetramethyl disiloxane platinum complex and 300 parts by weight of organic solvent, sequentially putting into a reaction kettle, uniformly stirring, and filtering for later use.
Preparing a double-sided adhesive tape:
the following processes are all completed in a clean room.
Preparing a PET film layer with the thickness of 25 +/-0.5 mu m, wherein the two fluoroplastic film layers with the thickness of 25 +/-0.5 mu m are prepared;
and uniformly coating the high-viscosity silica gel water on the first surface of the PET film, and heating and curing after the coating thickness is 10 +/-0.5 mu m.
Attaching the first fluoroplastic film to the first surface coated with the high-viscosity silicon glue;
and uniformly coating the second surface of the PET film with the primer glue, heating and curing after the coating thickness II is 0.5 +/-0.2 mu m.
And uniformly coating the modified high-viscosity silica gel on the second surface of the PET film coated with the primer glue, heating to 90 ℃ after the coating thickness is three to 50 +/-0.5 mu, evaporating the organic solvent in the modified high-viscosity silica gel, and heating to 200 ℃ to finish curing.
And (3) attaching the second fluorine plastic film to the second surface coated with the modified high-viscosity silicon glue, namely finishing the manufacture of the double-sided adhesive tape, wherein the peel strength detection result of the adhesive tape is shown in table 1.
TABLE 1 180 ℃ peel strength test result (gf/in) of double-sided adhesive tape
Experiments show that the 180-degree peel strength of the modified high-viscosity silica gel layer phase is far higher than that of the high-viscosity silica gel layer, the peel strength of the modified high-viscosity silica gel layer is obviously increased along with the prolonging of the adhesion time, and on the contrary, the peel strength of the high-viscosity silica gel layer is gradually reduced along with the prolonging of the adhesion time.
In summary, it can be seen from the examples that when the modified high-viscosity silicone adhesive is prepared from 100 parts by weight of the silicone pressure-sensitive adhesive, 5 parts by weight of the benzoyl peroxide BPO, and 35 parts by weight of the toluene, and is cured by heating for the second time, the modified high-viscosity silicone layer has the maximum peel strength, and the peel strength is significantly improved when the aged modified high-viscosity silicone layer is adhered with the polytetrafluoroethylene.
When the high-viscosity silicon glue is prepared from 90 parts by weight of vinyl polysiloxane, 65 parts by weight of methyl vinyl MQ resin, 2 parts by weight of hydrogen-containing silicone oil, 1.5 parts by weight of amino silane coupling agent, 1.5 parts by weight of divinyl tetramethyl disiloxane platinum-gold complex and 150 parts by weight of organic solvent, and the high-viscosity silicon glue layer has the maximum peel strength when cured by heating.
Therefore, the polytetrafluoroethylene can be firmly adhered by the double-sided adhesive tape with the high-viscosity silica gel layer and the modified high-viscosity silica gel layer.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A preparation method of a double-sided silica gel adhesive tape is characterized by comprising the following steps:
measuring high-viscosity silica gel water, modified high-viscosity silica gel water and bottom coating glue, and sequentially filtering for later use;
uniformly coating high-viscosity silica gel water on the first surface of the PET film, and heating to complete the first curing;
attaching the first fluoroplastic film to the first surface coated with the high-viscosity silicon glue;
uniformly coating the first-coating glue on the first surface of the PET film, and heating to complete the first curing;
uniformly coating the modified high-viscosity silicon glue on the second surface of the PET film coated with the base coating glue, heating and drying, and continuing to heat to finish third curing;
attaching the second fluorine plastic film to the second surface coated with the modified high-viscosity silicon glue;
the steps are all finished in a dust-free room.
2. The method for preparing double-sided silica gel tape according to claim 1, wherein the high-viscosity silica gel comprises the following components: 80-100 parts of vinyl polysiloxane, 50-80 parts of methyl vinyl MQ resin, 1-3 parts of hydrogen-containing silicone oil, 1-2 parts of amino silane coupling agent, 1-2 parts of divinyl tetramethyl disiloxane platinum-gold complex and 100-200 parts of organic solvent.
3. The method for preparing double-sided silica gel tape according to claim 1, wherein the high-viscosity silica gel is coated to a thickness of 10 ± 0.5 μm.
4. The method for preparing double-sided silica gel tape according to claim 1, wherein the modified high-viscosity silica gel comprises the following components: 50-150 parts of organic silicon pressure-sensitive adhesive, 1-10 parts of Benzoyl Peroxide (BPO) and 20-50 parts of toluene.
5. The method for preparing double-sided silica gel tape according to claim 1, wherein the coating thickness of the modified high-viscosity silica gel is 50 ± 0.5 μm.
6. The method for preparing double-sided silica gel tape according to claim 1, wherein the drying temperature is 80-90 ℃; the temperature of the third curing is 170-200 ℃.
7. The method for preparing double-sided silica gel tape according to claim 1, wherein the primer glue comprises the following components: 80-100 parts of primer solution, 1-2 parts of hydrogen-containing silicone oil, 0.5-1 part of amino silane coupling agent, 1-2 parts of divinyl tetramethyl disiloxane platinum complex and 200-300 parts of organic solvent.
8. The method for preparing double-sided silica gel tape according to claim 1, wherein the coating thickness of the primer is 0.5 ± 0.2 μm.
9. A double-sided silica gel tape, which is characterized by being prepared by the preparation method of the double-sided silica gel tape of any one of claims 1 to 8; the coating comprises a first fluoroplastic film layer, a high-viscosity silica gel layer, a PET film layer, a bottom coating, a modified high-viscosity silica gel layer and a second fluoroplastic film layer which are tightly attached in sequence.
10. The double-sided silicone adhesive tape according to claim 9,
the thicknesses of the first fluoroplastic film layer and the second fluoroplastic film layer are both 25 +/-0.5 mu m;
the thickness of the high-viscosity silica gel layer is 10 +/-0.5 mu m;
the thickness of the PET film layer is 25 +/-0.5 mu m;
the thickness of the bottom coating is 0.5 +/-0.2 mu m;
the thickness of the modified high-viscosity silica gel layer is 50 +/-0.5 mu m.
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| CN115044316A (en) * | 2022-07-01 | 2022-09-13 | 苏州市星辰科技有限公司 | Preparation method of silica gel adhesive tape for lens packaging |
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