CN116716073A - Adhesive coating liquid, protective film, preparation method and application - Google Patents
Adhesive coating liquid, protective film, preparation method and application Download PDFInfo
- Publication number
- CN116716073A CN116716073A CN202310680216.6A CN202310680216A CN116716073A CN 116716073 A CN116716073 A CN 116716073A CN 202310680216 A CN202310680216 A CN 202310680216A CN 116716073 A CN116716073 A CN 116716073A
- Authority
- CN
- China
- Prior art keywords
- coating liquid
- adhesive coating
- parts
- protective film
- agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 69
- 239000011248 coating agent Substances 0.000 title claims abstract description 54
- 238000000576 coating method Methods 0.000 title claims abstract description 54
- 239000000853 adhesive Substances 0.000 title claims abstract description 45
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 45
- 239000007788 liquid Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 49
- 239000011347 resin Substances 0.000 claims abstract description 49
- 239000002216 antistatic agent Substances 0.000 claims abstract description 38
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 37
- 239000010410 layer Substances 0.000 claims abstract description 36
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 34
- 229920000570 polyether Polymers 0.000 claims abstract description 34
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 239000012790 adhesive layer Substances 0.000 claims abstract description 17
- 239000002904 solvent Substances 0.000 claims abstract description 12
- 229920000642 polymer Polymers 0.000 claims abstract description 7
- 125000001153 fluoro group Chemical group F* 0.000 claims abstract description 5
- -1 polysiloxane Polymers 0.000 claims abstract description 5
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 5
- 229920005749 polyurethane resin Polymers 0.000 claims abstract description 5
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 4
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 4
- 239000003292 glue Substances 0.000 claims description 14
- 229910003002 lithium salt Inorganic materials 0.000 claims description 5
- 159000000002 lithium salts Chemical group 0.000 claims description 5
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 3
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 abstract description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 30
- 238000003756 stirring Methods 0.000 description 29
- 230000000052 comparative effect Effects 0.000 description 13
- 238000005303 weighing Methods 0.000 description 9
- 239000011521 glass Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- 229920001558 organosilicon polymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- ZQTYRTSKQFQYPQ-UHFFFAOYSA-N trisiloxane Chemical class [SiH3]O[SiH2]O[SiH3] ZQTYRTSKQFQYPQ-UHFFFAOYSA-N 0.000 description 1
- 235000012773 waffles Nutrition 0.000 description 1
- 230000002087 whitening effect Effects 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
- 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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- 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
- C09J171/00—Adhesives based on polyethers obtained by reactions forming an ether 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
- 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
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester 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
- C09J2475/00—Presence of polyurethane
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laminated Bodies (AREA)
- Paints Or Removers (AREA)
Abstract
The embodiment of the application provides an adhesive coating liquid, a protective film, a preparation method and application thereof, and relates to the field of electronic screen protective films. The adhesive coating liquid comprises the following components in parts by weight: 80-100 parts of main resin, 4-12 parts of curing agent, 1-3 parts of antistatic agent, 0.2-1 part of polyether modified fluorosilicone auxiliary agent and 80-120 parts of solvent; the main resin is at least one of polyurethane resin, acrylic resin and polyether resin, and the polyether modified fluorosilicone auxiliary agent is an amphiphilic polymer which introduces fluorine atoms into polysiloxane. The protective film comprises a base film layer, an adhesive layer and a release film layer which are sequentially laminated from top to bottom, and the adhesive layer is formed by coating and curing the adhesive coating liquid. The adhesive coating liquid can ensure that the film tearing voltage of the protective film is low, and avoid charge breakdown caused by tearing the protective film.
Description
Technical Field
The application relates to the field of electronic screen protective films, in particular to an adhesive coating liquid, a protective film, a preparation method and application.
Background
In recent years, the development of electronic technology accelerates the update speed of global electronic products, consumers also seek fashion and novelty to shorten the replacement period of electronic products, and these factors promote the development speed of global touch screen technology market and the increase of industrial scale. At present, the touch screen technology is developed in the directions of multi-point touch, large-scale, thin and light weight, and the like, which puts higher requirements on auxiliary materials matched with a touch panel (tp), in particular to a protective film used when the touch panel is shipped. The protective film of the touch panel is a low-voltage protective film, and must have an excellent antistatic function, so as to avoid the loss caused by the breakdown of charges due to the tearing of the protective film.
Because the surfaces of the touch panel are treated differently, the surface resistivity is different, and especially when AGC glass is used as the surface of the touch panel, the surface resistivity of the glass reaches 10 13 Omega cm, which makes the film tearing voltage of the protective film on the surface of the protective film far higher than 500V during tearing, and the risk of breakdown is easily generated.
Disclosure of Invention
The embodiment of the application aims to provide an adhesive coating liquid, a protective film, a preparation method and application thereof, which ensure that the film tearing voltage of the protective film is low and avoid charge breakdown caused by tearing the protective film.
In a first aspect, an embodiment of the present application provides an adhesive coating solution, including, in parts by weight: 80-100 parts of main resin, 4-12 parts of curing agent, 1-3 parts of antistatic agent, 0.2-1 part of polyether modified fluorosilicone auxiliary agent and 80-120 parts of solvent; the main resin is at least one of polyurethane resin, acrylic resin and polyether resin, and the polyether modified fluorosilicone auxiliary agent is an amphiphilic polymer which introduces fluorine atoms into polysiloxane.
In the technical scheme, the polyether modified fluorosilicone auxiliary agent is added into the adhesive coating liquid, and the polyether modified fluorosilicone auxiliary agent is a polymer which introduces fluorine atoms into polysiloxane, so that the adhesive coating liquid has the excellent properties of low surface tension, high and low temperature resistance, weather resistance and the like of organosilicon polymers, and also has the properties of low surface energy, solvent resistance and the like of fluorine-containing polymers; the polyether modified fluorosilicone assistant is one kind of amphiphilic surfactant with excellent hydrophobicity, and has excellent hydrophilicity, so that the adhesive layer has excellent hydrophilicity, and the adhesive has excellent adhesion to the adhered matter and low static voltage.
In one possible implementation, the main resin has a molecular weight of 500-3000 and a viscosity of 1000-20000 mPa.S at 25 ℃.
In the technical scheme, the main resin belongs to resin with higher molecular weight, the curing degree is higher, and poor cohesive force caused by low molecular weight of the main resin is avoided; the main resin is liquid resin with specific viscosity, so that the formed coating liquid is coated on the surface of the base film, and the appearance of the protective film is ensured.
In one possible implementation, the curing agent is an adduct of toluene diisocyanate and trimethylolpropane, and the viscosity at 25℃is 1000-2000 mPa.s.
In one possible implementation, the antistatic agent is a lithium salt type antistatic agent.
In the technical scheme, the lithium salt antistatic agent has better conductivity than the ionic antistatic agent, and the lithium salt antistatic agent and the polyether modified fluorosilicone auxiliary agent have good compatibility in the main resin, so that the optimal function is ensured.
In one possible implementation, the antistatic agent is added in an amount of not more than 3% relative to the main resin.
In the above technical scheme, the addition amount of the auxiliary agent such as the antistatic agent is controlled within a range which does not affect cohesion. The antistatic agent is added in a proportion exceeding a certain proportion, so that the antistatic agent is precipitated on the surface of the adhesive layer, the cohesion of the adhesive layer is greatly destroyed, and meanwhile, the phenomenon of whitening and fogging can be generated to influence the surface of an object to be adhered.
In one possible implementation, the polyether modified fluorosilicone aid is added in an amount of no more than 1% relative to the main resin.
In the technical scheme, the addition amount of the polyether modified fluorosilicone auxiliary agent is controlled within the range which does not influence cohesion, so that the problems that the internal structure is damaged and the crosslinking is not tight due to the fact that excessive auxiliary agents are added into the adhesive layer are avoided. By controlling the addition amount of the polyether modified fluorosilicone auxiliary agent, the problems that the existing low-tear-film voltage protective film on the market has poor adhesiveness due to the addition of excessive modified auxiliary agents in order to ensure the low-voltage performance of the protective film on a touch panel and the protective film is rubbed off by hands and exposed are solved.
In a second aspect, an embodiment of the present application provides an adhesive coating solution provided in the first aspect, where the adhesive coating solution is prepared by mixing and stirring a main resin and a solvent uniformly, adding an antistatic agent, a polyether modified fluorosilicone assistant and a curing agent, and stirring uniformly.
In the technical scheme, the main resin is homogenized first, and then various auxiliary agents are sequentially added, so that the overall uniformity is ensured.
In a third aspect, an embodiment of the present application provides a protective film, which includes a base film layer, a glue layer and a release film layer sequentially stacked from top to bottom, where the glue layer is formed by coating and curing the adhesive coating liquid provided in the first aspect.
In the technical scheme, the protective film is attached to the tp surface by the aid of the adhesive layer, the adhesive layer can play a role in protecting tp, and the voltage of the film tearing layer is low, so that the tp surface is not affected.
In a fourth aspect, an embodiment of the present application provides a method for preparing a protective film provided in the third aspect, including the steps of: coating an adhesive coating liquid on one corona surface of the base film layer, and thermally curing to form a glue layer; and compounding a release film layer on the surface of the adhesive layer, which is away from the base film layer.
In a fifth aspect, embodiments of the present application provide a use of the protective film provided in the third aspect for adhering and protecting a film having a resistivity of not less than 10 13 Omega cm surface.
In the technical proposal, the protective film added with the polyether modified fluorosilicone auxiliary agent is applied to the resistivity of not less than 10 13 Omega cm surface (e.g. AGC glassGlass) can reach the standard of film tearing voltage less than 500V, and is certainly applicable to other surfaces with lower resistivity.
Detailed Description
The conventional protective film structure comprises a base film layer, a glue layer and a release film layer which are sequentially laminated from top to bottom, when the protective film on the market is applied to a surface with higher resistivity (such as the surface of a touch panel using AGC glass), the tearing voltage of the protective film is far higher than 500V when the protective film is torn off, and the danger of breakdown of the touch panel is easy to generate.
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The adhesive coating liquid, the protective film, the preparation method and the application of the embodiment of the application are specifically described below.
The embodiment of the application provides an adhesive coating liquid, which comprises the following components in parts by weight: 80-100 parts of main resin, 4-12 parts of curing agent, 1-3 parts of antistatic agent, 0.2-1 part of polyether modified fluorosilicone auxiliary agent and 80-120 parts of solvent. Alternatively, the addition amount of the antistatic agent with respect to the main resin is not more than 3%; the addition amount of the polyether modified fluorosilicone auxiliary agent relative to the main resin is not more than 1 percent.
The adhesive coating liquid provided by the embodiment of the application comprises the following raw material components:
the main resin is at least one of polyurethane resin, acrylic resin and polyether resin, the coating liquid formed by adding the three main resins can be solidified into a glue layer, the molecular weight of the main resin is 500-3000, and the viscosity of the main resin at 25 ℃ is 1000-20000 mPa.S.
The curing agent is an adduct of toluene diisocyanate and trimethylolpropane and has a viscosity of 1000 to 2000 mPas at 25℃such as TL-75E from Wanhua chemical group Co., ltd.
The antistatic agent is a lithium salt type antistatic agent, and the effective component may be 50%, for example, IL-AP8 of the manufacturer Koei Chemical Co.Ltd.
The main component of the polyether modified fluorosilicone auxiliary agent is polyether modified trisiloxane surfactant, which is an amphiphilic polymer with fluorine atoms introduced into polysiloxane, the active matter content can be 100% (the content of the amphiphilic polymer of the effective component in the polyether modified fluorosilicone auxiliary agent is 100%, and no other solvent is added), for example, the polyether modified fluorosilicone auxiliary agent is FS-3100 of Kemu chemical Co.
The solvent is at least one of ethyl acetate, toluene and butanone.
The embodiment of the application provides the adhesive coating liquid, which is prepared by mixing and stirring main resin and a solvent uniformly, adding an antistatic agent, a polyether modified fluorosilicone auxiliary agent and a curing agent, and stirring uniformly.
The embodiment of the application also provides a protective film which comprises a base film layer, an adhesive layer and a release film layer which are sequentially laminated from top to bottom.
Wherein the thickness of the base film layer is 20-100 μm, and the material of the base film layer can be at least one of PET, PP, OPP.
The adhesive layer is formed by coating and curing the adhesive coating liquid provided in the first aspect, and the thickness of the adhesive layer is 5-25 mu m.
The thickness of the release film layer is 50-100 μm, and the release film layer can be a non-silicon PET release film.
The embodiment of the application provides a preparation method of the protective film, which comprises the following steps: coating an adhesive coating liquid on one corona surface of the base film layer, and thermally curing to form a glue layer, wherein the coated base film layer can be put into a baking oven, and the set value of the temperature of the baking oven ensures that the solvent in the glue layer can be completely baked; and (3) compounding a release film layer on the surface of the adhesive layer, which is away from the base film layer, and placing the adhesive layer in an environment with the constant temperature of 35-45 ℃ for 72-96 hours.
The embodiment of the application provides the application of the protective film, and the protective film is used for adhering and protecting the resistivity not less than 10 13 Omega cm surface, AGC glass has a surface resistance value of usually 10 or more 13 Omega cm, a protective film is commonly used to adhere to the AGC glass surface of tp to protect tp.
When in use, the release film layer of the protective film is required to be torn off, and then the adhesive layer is adhered to the surface to be protected.
The features and capabilities of the present application are described in further detail below in connection with the examples.
Example 1
The embodiment provides a protective film, which is prepared as follows:
weighing 100 parts by weight of main resin (polyurethane resin, GT-P1801 of Shanghai Gu Tong new material technology Co., ltd., viscosity at 25 ℃ is 1500-3500 mPa.S), adding 100 parts by weight of ethyl acetate, and stirring uniformly; then 1 part of antistatic agent (IL-AP 8 of Koei Chemical Co.Ltd.) and 0.5 part of fluorosilicone auxiliary agent (polyether modified fluorosilicone auxiliary agent, FS-3100 of Kemu Chemical Co., ltd.) were added, and stirred for 5 minutes, and finally 8 parts of curing agent (TL-75E of Wanhua Chemical Co., ltd.) were added, and stirred for 10 minutes, to obtain an adhesive coating liquid.
Selecting a PET substrate with the thickness of 50 mu m, coating an adhesive coating on the corona surface of the PET substrate to form an adhesive coating, wherein the thickness of the adhesive layer is 10 mu m, putting the PET substrate coated with the adhesive coating into a baking oven, and baking the solvent in the adhesive coating completely. And (3) rolling the baked PET substrate, covering a non-silicon release film (HMX 50T20 of Jiangyin Huamei photoelectric technology Co., ltd.) with the thickness of 50 mu m, and standing for 80 hours in an environment with the constant temperature of 40 ℃ to obtain the protective film.
Example 2
This example provides a protective film, which is different from example 1 in the preparation process: weighing 100 parts of main resin according to parts by weight, adding 100 parts of ethyl acetate, and uniformly stirring; and adding 3 parts of antistatic agent and 1 part of fluorosilicone auxiliary agent, stirring for 5min, and finally adding 12 parts of curing agent, and stirring for 10min to obtain the adhesive coating liquid.
Example 3
This example provides a protective film, which is different from example 1 in the preparation process: weighing 100 parts of main resin according to parts by weight, adding 100 parts of ethyl acetate, and uniformly stirring; and adding 2 parts of antistatic agent and 0.2 part of fluorosilicone auxiliary agent, stirring for 5min, and finally adding 4 parts of curing agent, and stirring for 10min to obtain the adhesive coating liquid.
Example 4
This example provides a protective film, which is different from example 1 in the preparation process: weighing 80 parts of main resin according to parts by weight, adding 80 parts of ethyl acetate, and uniformly stirring; and adding 2 parts of antistatic agent and 0.5 part of fluorosilicone auxiliary agent, stirring for 5min, and finally adding 8 parts of curing agent, and stirring for 10min to obtain the adhesive coating liquid.
Example 5
This example provides a protective film, which is different from example 1 in the preparation process: weighing 80 parts of main resin according to parts by weight, adding 80 parts of ethyl acetate, and uniformly stirring; and adding 3 parts of antistatic agent and 0.5 part of fluorosilicone auxiliary agent, stirring for 5min, and finally adding 8 parts of curing agent, and stirring for 10min to obtain the adhesive coating liquid.
Example 6
This example provides a protective film, which is different from example 1 in the preparation process: weighing 80 parts of main resin according to parts by weight, adding 80 parts of ethyl acetate, and uniformly stirring; and adding 2 parts of antistatic agent and 1 part of fluorosilicone auxiliary agent, stirring for 5min, and finally adding 8 parts of curing agent, and stirring for 10min to obtain the adhesive coating liquid.
Comparative example 1
This comparative example provides a protective film, which is prepared by a process different from that of example 1 in that: weighing 100 parts of main resin, adding 100 parts of ethyl acetate, and uniformly stirring; and adding 1 part of antistatic agent, stirring for 5min, and finally adding 8 parts of curing agent, and stirring for 10min to obtain the adhesive coating liquid.
Comparative example 2
This comparative example provides a protective film, which is prepared by a process different from that of example 1 in that: weighing 100 parts of main resin, adding 100 parts of ethyl acetate, and uniformly stirring; then adding 0.5 part of antistatic agent 1 part of fluorosilicone auxiliary agent (hydroxyl modified fluorosilicone auxiliary agent, active matter content 96% and 706 of Dongguan waffle new material technology Co., ltd.) and stirring for 5min, finally adding 8 parts of curing agent and stirring for 10min.
Comparative example 3
This comparative example provides a protective film, which is prepared by a process different from that of example 1 in that: weighing 100 parts of main resin according to parts by weight, adding 100 parts of ethyl acetate, and uniformly stirring; and adding 2 parts of antistatic agent and 0.1 part of fluorosilicone auxiliary agent, stirring for 5min, and finally adding 8 parts of curing agent, and stirring for 10min to obtain the adhesive coating liquid.
The protective films of examples and comparative examples were tested for film tearing voltage and adhesion by the following test methods:
1. film tearing voltage:
the object used in the test is AGC glass with resistivity of 10 13 Omega cm, and cutting the protective film into equal specifications according to the size of the object to be stuck. The surface of the object to be stuck is wiped by alcohol, the surface charge of the object to be stuck is blown away by an ion blower, and the object to be stuck is tested by a hand-held voltage tester, so that the surface voltage is less than 100V.
And then the protective film is stuck on a stuck object, one hand tears the protective film from one corner, the other hand holds the tester, the tester is tested while tearing the film, and the maximum value displayed by the tester is recorded, namely the film tearing voltage.
The voltage is affected by errors existing in the test, and the operation, speed and angle of the film tearing, so that the film tearing voltage can be greatly different. In order to obtain objective test results, the film tearing is repeated for 5 times under the same test conditions, the film tearing voltage is recorded for 5 times, and only the film tearing voltage for 5 times does not exceed 500V, the film tearing voltage requirement can be considered to be met.
2. Adhesion property
The adhesion of the protective films of examples and comparative examples was tested by rubbing with hands (index finger rubbing back and forth from top to bottom 20 times).
The results of the test are as follows:
TABLE 1 test data for different protective films
As can be seen from the data in Table 1, the values of the tear voltages of the protective films of example 1 to which the polyether-modified fluorosilicone aid was added were much lower than those of comparative example 1 to which no such aid was added, and were < 500V. Moreover, the protective films of the embodiments 1-6 can meet the requirement that the film tearing voltage is less than 500V, which indicates that the protective film formed by adopting the specific components in the embodiment of the application has low film tearing voltage and can effectively avoid charge breakdown caused by tearing the protective film.
Wherein, the protective films of the embodiments 1-4 are transparent, and have no glue dropping phenomenon, which indicates that the apparent glue surface of the protective film of the embodiment of the application is not whitened and has good adhesiveness; the antistatic agent used in example 5 was added in an amount of 3.75% relative to the main resin, and the appearance was shown to be blushing; the polyether modified fluorosilicone assistant adopted in the example 6 has the addition amount of 1.25% relative to the main resin, and the crosslinking is not tight, which is expressed as hand rubbing off; the film tearing voltage of examples 5-6 is higher than that of examples 1-4, and therefore, the addition amount of the antistatic agent and the polyether modified fluorosilicone auxiliary agent relative to the main resin is controlled within a certain range, so that the film tearing voltage can be ensured to be lower, the apparent rubber surface can be ensured not to be whitened, the rubber is not rubbed by hands, and the adhesiveness is good.
The comparative example 2 has a lower tear voltage than comparative example 1, but the values of the tear voltage of the protective film added with the hydroxy-modified fluorosilicone auxiliary agent are all > 500V, and do not meet the standard requirements. The reason is presumed to be that: although the hydroxyl group of the hydroxyl modified fluorosilicone auxiliary agent reacts with the main resin to form polyester, the hydrolysis resistance and the aging resistance of the polyester are not as good as those of polyether, so the film tearing voltage of the comparative example 2 is still high. The reason for this is presumed to be: the antistatic agent is added into the glue and is mechanically stirred and uniformly dispersed in the glue, and in a molten state, antistatic agent molecules can form a compact arrangement at the interface between the main resin and air, namely hydrophilic groups extend to the outside of the resin, lipophilic groups extend to the inside of the resin, and hydrophilic groups and water in the air form a conductive molecular layer through hydrogen bonds, so that the antistatic agent plays a role in static electricity. On the basis, the hydrolysis resistance of the polyether is better than that of polyester, the hydrophilicity is also better, water molecules in the air can be better combined, the hydrolysis resistance of the polyester is poorer than that of the polyether, the actions of the antistatic agent and the water molecules are reduced, and the antistatic agent can better play a role.
The component amounts of the adhesive coating liquid of comparative example 3 do not meet the requirements set by the present application, and the film tearing voltage is very high.
Therefore, the protective film added with the polyether modified fluorosilicone auxiliary agent can reach the standard that the film tearing voltage is less than 500V when applied to the AGC glass, and is certainly applicable to other touch panels with surface resistivity lower than the AGC glass.
In summary, the adhesive coating liquid, the protective film, the preparation method and the application of the embodiment of the application ensure that the film tearing voltage of the protective film is low and avoid charge breakdown caused by tearing the protective film.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The adhesive coating liquid is characterized by comprising the following components in parts by weight: 80-100 parts of main resin, 4-12 parts of curing agent, 1-3 parts of antistatic agent, 0.2-1 part of polyether modified fluorosilicone auxiliary agent and 80-120 parts of solvent; the main resin is at least one of polyurethane resin, acrylic resin and polyether resin, and the polyether modified fluorosilicone auxiliary agent is an amphiphilic polymer for introducing fluorine atoms into polysiloxane.
2. The adhesive coating liquid according to claim 1, wherein the molecular weight of the main resin is 500-3000 and the viscosity at 25 ℃ is 1000-20000 mPa-S.
3. The adhesive coating liquid according to claim 1, wherein the curing agent is an adduct of toluene diisocyanate and trimethylolpropane, and the viscosity at 25 ℃ is 1000 to 2000 mPa-s.
4. The adhesive coating solution of claim 1, wherein the antistatic agent is a lithium salt type antistatic agent.
5. The adhesive coating liquid according to claim 1, wherein the addition amount of the antistatic agent with respect to the main resin is not more than 3%.
6. The adhesive coating liquid according to claim 1, wherein the addition amount of the polyether-modified fluorosilicone aid relative to the main resin is not more than 1%.
7. An adhesive coating liquid according to any one of claims 1 to 6, wherein the main resin and the solvent are mixed and stirred uniformly, and then the antistatic agent, the polyether modified fluorosilicone auxiliary agent and the curing agent are added and stirred uniformly.
8. A protective film, comprising a base film layer, a glue layer and a release film layer which are sequentially laminated from top to bottom, wherein the glue layer is formed by coating and curing the adhesive coating liquid according to any one of claims 1 to 6.
9. A method for producing the protective film according to claim 8, comprising the steps of: coating an adhesive coating liquid on one corona surface of the base film layer, and thermally curing to form a glue layer; and compounding a release film layer on the surface of the adhesive layer, which is away from the base film layer.
10. The use of the protective film according to claim 8, wherein the protective film is used for adhesion and protection of resistivity not less than 10 13 Omega cm surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310680216.6A CN116716073A (en) | 2023-06-09 | 2023-06-09 | Adhesive coating liquid, protective film, preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310680216.6A CN116716073A (en) | 2023-06-09 | 2023-06-09 | Adhesive coating liquid, protective film, preparation method and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116716073A true CN116716073A (en) | 2023-09-08 |
Family
ID=87874593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310680216.6A Pending CN116716073A (en) | 2023-06-09 | 2023-06-09 | Adhesive coating liquid, protective film, preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116716073A (en) |
-
2023
- 2023-06-09 CN CN202310680216.6A patent/CN116716073A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104419358B (en) | Adhesive composition, adhesive film and surface protection film | |
| TWI669383B (en) | Antistatic surface-protective film | |
| CN112680135B (en) | Support film for OLED module and preparation method thereof | |
| TW201805383A (en) | Method for producing antistatic surface-protective film, and antistatic surface-protective film | |
| JP5889088B2 (en) | Adhesive composition and adhesive sheet | |
| CN104745116A (en) | Surface protection film and optical component attached with the film | |
| JP2013107977A (en) | Pressure-sensitive adhesive composition and surface protection film | |
| JP2012224811A (en) | Pressure-sensitive adhesive composition and surface protection film | |
| JP5848327B2 (en) | Adhesive composition and film for optical member | |
| CN103980820A (en) | Pressure-sensitive adhesion composition, pressure-sensitive adhesive, and pressure-sensitive adhesion sheet | |
| CN113372842B (en) | Antistatic polyurethane protective film and preparation method thereof | |
| CN108690535A (en) | Adhesion agent composition and adhesive film | |
| CN114891472B (en) | Polyurethane adhesive, polyurethane protective film and preparation method | |
| TW202111046A (en) | Method for producing antistatic surface- protective film, and antistatic surface- protective film | |
| CN105950041A (en) | Release film having excellent peelability | |
| CN108300365A (en) | Adhesive composition, adhesive film and surface protection film | |
| CN113388142A (en) | Polyurethane protective film and preparation method thereof | |
| CN114369418B (en) | PU protective film for display screen manufacturing process and preparation method thereof | |
| CN111394009A (en) | Low-precipitation protective film, preparation method thereof and touch screen | |
| KR20140143693A (en) | Adhesive composition, and adhesive film, surface protection film using the same | |
| CN116716073A (en) | Adhesive coating liquid, protective film, preparation method and application | |
| CN108795339B (en) | Adhesive composition and adhesive film | |
| CN110511699A (en) | Bonding sheet is used in the protection of the hole IR | |
| CN110643296A (en) | Adhesive sheet | |
| JP6359164B2 (en) | Release film for antistatic surface protection film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |