CN109401655B - Functional soft protective film and preparation method thereof - Google Patents
Functional soft protective film and preparation method thereof Download PDFInfo
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- CN109401655B CN109401655B CN201710934691.6A CN201710934691A CN109401655B CN 109401655 B CN109401655 B CN 109401655B CN 201710934691 A CN201710934691 A CN 201710934691A CN 109401655 B CN109401655 B CN 109401655B
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- 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
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- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
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- C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
- C09J9/02—Electrically-conducting adhesives
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
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- 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
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- 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
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- 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
- C09J2301/314—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 layer and/or the carrier being conductive
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- C09J2475/006—Presence of polyurethane in the substrate
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Abstract
The invention provides a functional soft protective film, which comprises a first protective film, a using layer and a second protective film; the use layer comprises: the antistatic silica gel layer is compounded on the second protective film; the first base material layer is compounded on the antistatic silica gel layer; an antistatic resin layer compounded on the first substrate layer; the first protection film includes: an adhesive layer compounded on the antistatic resin layer; a second substrate layer compounded on the adhesive layer; the antistatic silica gel layer is formed by curing silica gel containing 0.5-5 wt% of antistatic agent, and the antistatic resin layer is formed by curing resin containing 0.5-5 wt% of antistatic agent. The functional soft protective film provided by the invention adopts the antistatic silica gel layer containing the antistatic agent with a specific dosage and the antistatic resin layer containing a specific dosage at the same time, and is matched with other specific layer structures to realize the reinforcement of the integrity of the product, so that the functional soft protective film can be widely applied to screen protection of planes or curved surfaces, and has antistatic and self-cleaning functions.
Description
Technical Field
The invention relates to the technical field of protective films, in particular to a functional flexible protective film and a preparation method thereof.
Background
With the rapid development of electronic product technology, mobile electronic terminal devices such as mobile phones, notebooks, tablet computers, and car-mounted computers are well known and used by more and more people, and the screen thereof is one of the most important devices. In recent years, with the development and popularization of 2.5D and 3D screens, most current mobile phones adopt cambered surface glass screens, and although the cost of the 2.5D and 3D cambered surface glass screens is higher for the mobile phones, the cambered surface glass screens have more rounded edges and corners, so that the cambered surface glass screens more accord with the aesthetic feeling and experience of consumers, and meanwhile, the anti-collision performance is enhanced.
At present, for the protection of small glass screens, toughened glass is mainly used for protection in the prior art, but the toughened glass still has a fragile risk and has a poor attaching effect on 2.5D and 3D screens, and a more effective protection scheme for the 2.5D or 3D screens is to use a hot-pressing film for protection, but the hot-pressing film has a fixed shape and is difficult to adjust and inconvenient to use; for large glass screens, the prior art has no good protection measures. More importantly, both toughened glass and hot-pressed film are difficult to meet the requirements of functional protective films, and especially in today that high-end electronic equipment is more and more popular, people have higher and higher requirements on the functional protective films.
Disclosure of Invention
In view of the above, the present invention provides a functional flexible protective film and a method for manufacturing the same, which can be widely applied to screen protection of a plane or a curved surface, and has antistatic and self-cleaning functions.
The invention provides a functional soft protective film, which comprises a first protective film, a using layer and a second protective film;
the use layer comprises:
the antistatic silica gel layer is compounded on the second protective film;
the first base material layer is compounded on the antistatic silica gel layer;
an antistatic resin layer compounded on the first substrate layer;
the first protection film includes:
an adhesive layer compounded on the antistatic resin layer;
a second substrate layer compounded on the adhesive layer;
the antistatic silica gel layer is formed by curing silica gel containing 0.5-5 wt% of antistatic agent, and the antistatic resin layer is formed by curing resin containing 0.5-5 wt% of antistatic agent.
Preferably, the antistatic agent comprises one or more of a poly JL-XS antistatic agent, a basf VS03 antistatic agent, and a poly JL-WT antistatic agent.
Preferably, the antistatic silica gel layer has a thickness of 10 to 50 μm and a peeling force of 1 to 200gf/25 mm.
Preferably, the first substrate layer is selected from a PE substrate, a TPU substrate or a PVC substrate; the thickness of the first base material layer is 100-300 mu m.
Preferably, the antistatic resin layer is an antistatic silicone resin layer or an antistatic organofluorine resin layer; the thickness of the antistatic resin layer is 5-50 μm.
Preferably, the adhesive layer is formed by curing adhesive layer glue, and the adhesive layer glue is silica gel pressure-sensitive adhesive or low-viscosity polyacrylate glue; the thickness of the adhesive layer is 5-15 μm.
Preferably, the peeling force between the adhesive layer and the antistatic resin layer is 1gf/25mm to 10gf/25mm, and the peeling force between the adhesive layer and the second substrate layer is 11gf/25mm to 20gf/25 mm.
The invention also provides a preparation method of the functional soft protective film in the technical scheme, which comprises the following steps:
a) coating a layer of silica gel containing 0.5-5 wt% of antistatic agent on one surface of the first substrate layer, coating a layer of resin containing 0.5-5 wt% of antistatic agent on the other surface of the first substrate layer, and curing to obtain a use layer;
b) compounding an adhesive layer on the surface of the second base material layer, and compounding the adhesive layer with the antistatic resin layer in the using layer obtained in the step a) to obtain the using layer compounded with the first protective film;
c) compounding the antistatic silica gel layer in the using layer compounded with the first protective film obtained in the step b) with a second protective film to obtain the functional soft protective film.
Preferably, the resin containing 0.5wt% to 5wt% of the antistatic agent in step a) is a fluorine-containing polyurethane resin; the fluorine-containing polyurethane resin consists of a prepolymer formed by hexafluoropropylene glycol, hexafluoropropylene glycol or toluene diisocyanate, a curing agent hexamethylene diisocyanate, a solvent ethyl acetate and an antistatic agent.
Preferably, the curing temperature of the silica gel containing 0.5 to 5 weight percent of the antistatic agent in the step a) is 120 to 200 ℃, and the curing time is 60 to 100 seconds; the resin containing 0.5-5 wt% of antistatic agent is cured at 70-150 deg.C for 60-100 s.
Preferably, the second protective film in step c) is selected from a fluoroplastic release film, a silicone oil release film or a non-silicone release film; the base material of the second protective film comprises one or more of PET, PE, OPP, BOPET and BOP.
The invention provides a functional soft protective film, which comprises a first protective film, a using layer and a second protective film; the use layer comprises: the antistatic silica gel layer is compounded on the second protective film; the first base material layer is compounded on the antistatic silica gel layer; an antistatic resin layer compounded on the first substrate layer; the first protection film includes: an adhesive layer compounded on the antistatic resin layer; a second substrate layer compounded on the adhesive layer; the antistatic silica gel layer is formed by curing silica gel containing 0.5-5 wt% of antistatic agent, and the antistatic resin layer is formed by curing resin containing 0.5-5 wt% of antistatic agent. Compared with the prior art, the functional soft protective film provided by the invention simultaneously adopts the antistatic silica gel layer containing the antistatic agent with a specific dosage and the antistatic resin layer containing a specific dosage, and is matched with other specific layer structures to realize the reinforcement of the integrity of the product, so that the obtained functional soft protective film can be widely applied to screen protection of planes or curved surfaces and has a good laminating effect; and has antistatic and self-cleaning functions.
Drawings
Fig. 1 is a schematic structural diagram of a functional flexible protective film according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a functional soft protective film, which comprises a first protective film, a using layer and a second protective film;
the use layer comprises:
the antistatic silica gel layer is compounded on the second protective film;
the first base material layer is compounded on the antistatic silica gel layer;
an antistatic resin layer compounded on the first substrate layer;
the first protection film includes:
an adhesive layer compounded on the antistatic resin layer;
a second substrate layer compounded on the adhesive layer;
the antistatic silica gel layer is formed by curing silica gel containing 0.5-5 wt% of antistatic agent, and the antistatic resin layer is formed by curing resin containing 0.5-5 wt% of antistatic agent.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a functional flexible protective film according to the present invention; wherein, 1 is first substrate layer, 2 is antistatic silica gel layer, 3 are antistatic resin layer, 4 are the second protection film, 5 are the second substrate layer, 6 are the viscose layer. In the invention, the functional soft protective film comprises a first protective film, a use layer and a second protective film which are sequentially compounded to form an integral structure.
In the present invention, the second protective film is preferably selected from a fluoroplastic release film, a silicone oil release film or a non-silicone release film, more preferably a fluoroplastic release film; the substrate of the second protective film preferably comprises one or more of PET, PE, OPP, BOPET and BOP, more preferably PET or PE. In a preferred embodiment of the present invention, the second protective film is a fluoroplastic PET release film; in another preferred embodiment of the present invention, the second protective film is a fluoroplastic PE release film. The source of the second protective film is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used.
In the present invention, the use layer is laminated on the second protective film. In the present invention, the use layer includes: the antistatic silica gel layer is compounded on the second protective film; the first base material layer is compounded on the antistatic silica gel layer; and the antistatic resin layer is compounded on the first base material layer. Therefore, the use layer is of a three-layer structure and is an antistatic silica gel layer, a first base material layer and an antistatic resin layer which are sequentially compounded, wherein the antistatic silica gel layer is compounded with the second protective film.
In the invention, the antistatic silica gel layer is formed by curing silica gel containing 0.5-5 wt% of antistatic agent, preferably 2-3 wt% of antistatic agent. In the present invention, the antistatic agent preferably comprises one or more of a poly JL-XS antistatic agent, a basf VS03 antistatic agent, and a poly JL-WT antistatic agent, more preferably a basf VS03 antistatic agent and a poly JL-WT antistatic agent. The source of the antistatic agent is not particularly limited in the present invention, and commercially available products well known to those skilled in the art may be used. In the present invention, the thickness of the antistatic silica gel layer is preferably 10 to 50 μm, and more preferably 20 to 30 μm; the peeling force of the antistatic silica gel layer is preferably 1gf/25mm to 200gf/25mm, more preferably 100gf/25 mm.
In the present invention, the first substrate layer is preferably selected from a PE substrate, a TPU substrate or a PVC substrate; the source of the first substrate layer is not particularly limited in the present invention, and commercially available products of the above-described PE substrate, TPU substrate, and PVC substrate, which are well known to those skilled in the art, may be used. In the present invention, the thickness of the first base material layer is preferably 100 to 300 μm, and more preferably 200 μm.
In the present invention, the antistatic resin layer is formed by curing a resin containing 0.5 to 5wt% of an antistatic agent, preferably 2 to 3 wt% of an antistatic agent. In the present invention, the antistatic agent is the same as described in the above technical solution, and is not described herein again. In the present invention, the antistatic resin layer is preferably an antistatic silicone resin layer or an antistatic organofluorine resin layer, more preferably an antistatic organofluorine resin layer; the antistatic organic fluorine resin layer is formed by curing fluorine-containing polyurethane resin, and the fluorine-containing polyurethane resin consists of resin which is hexafluoropropylene glycol, prepolymer formed by the hexafluoropropylene glycol and toluene diisocyanate, curing agent hexamethylene diisocyanate, solvent ethyl acetate and antistatic agent. In the present invention, the thickness of the antistatic resin layer is preferably 5 to 50 μm, and more preferably 20 to 30 μm.
According to the invention, the antistatic silica gel layer containing the antistatic agent with a specific dosage and the antistatic resin layer containing the antistatic agent with a specific dosage are compounded on the upper surface and the lower surface of the first base material layer respectively to form the use layer, so that the overall performance of the use layer can be improved, and the functionality of the product is obviously improved.
In the invention, the first protective film is compounded on the using layer. In the present invention, the first protection film includes: an adhesive layer compounded on the antistatic resin layer; and the second base material layer is compounded on the adhesive layer. Therefore, the first protection film is of a two-layer structure and is an adhesive layer and a second base material layer which are sequentially compounded, wherein the adhesive layer is compounded with the antistatic resin layer in the use layer.
In the invention, the adhesive layer is preferably formed by curing adhesive layer glue; the adhesive layer glue is preferably silica gel pressure sensitive adhesive or low-viscosity polyacrylate glue, and more preferably silica gel pressure sensitive adhesive. The source of the adhesive layer glue is not particularly limited in the invention, and the commercially available products of the silica gel pressure sensitive adhesive and the low-viscosity polyacrylate glue, which are well known to those skilled in the art, can be adopted. In the present invention, the thickness of the adhesive layer is preferably 5 to 15 μm, and more preferably 10 μm.
In the invention, the second substrate layer is preferably a PET substrate; the source of the second substrate layer in the present invention is not particularly limited, and commercially available products of the above PET substrate known to those skilled in the art may be used.
In the present invention, the peeling force between the adhesive layer and the antistatic resin layer is preferably 1gf/25mm to 10gf/25mm, more preferably 5gf/25 mm; the peeling force between the adhesive layer and the second substrate layer is preferably 11gf/25mm to 20gf/25mm, more preferably 15gf/25 mm.
The functional soft protective film provided by the invention simultaneously adopts the antistatic silica gel layer containing the antistatic agent with a specific dosage and the antistatic resin layer containing a specific dosage, and is matched with other specific layer structures to realize the reinforcement of the integrity of the product, so that the obtained functional soft protective film can be widely applied to screen protection of planes or curved surfaces and has a good laminating effect; and has antistatic and self-cleaning functions.
The invention also provides a preparation method of the functional soft protective film in the technical scheme, which comprises the following steps:
a) coating a layer of silica gel containing 0.5-5 wt% of antistatic agent on one surface of the first substrate layer, coating a layer of resin containing 0.5-5 wt% of antistatic agent on the other surface of the first substrate layer, and curing to obtain a use layer;
b) compounding an adhesive layer on the surface of the second base material layer, and compounding the adhesive layer with the antistatic resin layer in the using layer obtained in the step a) to obtain the using layer compounded with the first protective film;
c) compounding the antistatic silica gel layer in the using layer compounded with the first protective film obtained in the step b) with a second protective film to obtain the functional soft protective film.
Firstly, coating a layer of silica gel containing 0.5-5 wt% of antistatic agent on one surface of a first substrate layer, coating a layer of resin containing 0.5-5 wt% of antistatic agent on the other surface of the first substrate layer, and curing to obtain a use layer. In the invention, the first substrate layer, the silica gel containing 0.5wt% -5 wt% of the antistatic agent and the resin containing 0.5wt% -5 wt% of the antistatic agent are the same as those in the technical scheme, and are not described again.
In the present invention, the silica gel containing 0.5 to 5wt% of the antistatic agent is preferably blade-coated or slit-coated, and the present invention is not particularly limited thereto.
In the invention, the curing temperature of the silica gel containing 0.5-5 wt% of antistatic agent is preferably 120-200 ℃, more preferably 160-180 ℃; the curing time is preferably 60s to 100s, more preferably 75s to 90 s.
In the present invention, the resin containing 0.5 to 5wt% of the antistatic agent is preferably coated by a gravure coating or a blade coating, and the present invention is not particularly limited thereto.
In the present invention, the temperature at which the resin containing 0.5 to 5wt% of the antistatic agent is cured is preferably 70 to 150 ℃, more preferably 90 to 110 ℃; the curing time is preferably 60s to 100s, more preferably 75s to 90 s.
In the invention, the silica gel containing 0.5-5 wt% of antistatic agent coated on one side of the first substrate layer is cured to form an antistatic silica gel layer, and the resin containing 0.5-5 wt% of antistatic agent coated on the other side of the first substrate layer is cured to form an antistatic resin layer.
After the use layer is obtained, an adhesive layer is compounded on the surface of the second base material layer, and then the adhesive layer is compounded with the antistatic resin layer in the obtained use layer to obtain the use layer compounded with the first protective film. In the present invention, the second substrate layer and the adhesive layer are the same as those in the above technical solution, and are not described herein again.
After the using layer compounded with the first protective film is obtained, the antistatic silica gel layer in the using layer compounded with the first protective film is compounded with the second protective film to obtain the functional soft protective film. In the present invention, the second protective film is preferably selected from a fluoroplastic release film, a silicone oil release film or a non-silicone release film, more preferably a fluoroplastic release film; the substrate of the second protective film preferably comprises one or more of PET, PE, OPP, BOPET and BOP, more preferably PET or PE. In a preferred embodiment of the present invention, the second protective film is a fluoroplastic PET release film; in another preferred embodiment of the present invention, the second protective film is a fluoroplastic PE release film. The source of the second protective film is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used.
The invention provides a functional soft protective film, which comprises a first protective film, a using layer and a second protective film; the use layer comprises: the antistatic silica gel layer is compounded on the second protective film; the first base material layer is compounded on the antistatic silica gel layer; an antistatic resin layer compounded on the first substrate layer; the first protection film includes: an adhesive layer compounded on the antistatic resin layer; a second substrate layer compounded on the adhesive layer; the antistatic silica gel layer is formed by curing silica gel containing 0.5-5 wt% of antistatic agent, and the antistatic resin layer is formed by curing resin containing 0.5-5 wt% of antistatic agent. Compared with the prior art, the functional soft protective film provided by the invention simultaneously adopts the antistatic silica gel layer containing the antistatic agent with a specific dosage and the antistatic resin layer containing a specific dosage, and is matched with other specific layer structures to realize the reinforcement of the integrity of the product, so that the obtained functional soft protective film can be widely applied to screen protection of planes or curved surfaces and has a good laminating effect; and has antistatic and self-cleaning functions.
To further illustrate the present invention, the following examples are provided for illustration.
Example 1
(1) Coating a silicone rubber containing 2.5 WT% of an antistatic agent (basf VS03 antistatic agent) on one side of a TPU substrate, and coating a fluorine-containing polyurethane resin containing 2.5 WT% of an antistatic agent (poly JL-WT antistatic agent) on the other side, wherein the silicone rubber containing 2.5 WT% of the antistatic agent is baked at 170 ℃ for 90 s; the fluorinated polyurethane resin containing 2.5 wt% of the antistatic agent is baked at 100 ℃ for 75s, and a using layer is obtained after curing;
the using layer is of a three-layer structure of an antistatic silica gel layer, a TPU substrate layer and an antistatic fluorine-containing polyurethane resin layer which are sequentially compounded, wherein the thickness of the antistatic silica gel layer is 20 micrometers, and the stripping force is 100gf/25 mm; the thickness of the TPU substrate layer is 200 mu m; the thickness of the antistatic fluorine-containing polyurethane resin layer is 30 μm, and the preparation method is as follows: 10 parts by weight of resin composition is a prepolymer formed by hexafluoropentanediol, 10 parts by weight of curing agent hexamethylene diisocyanate, 3 parts by weight of solvent ethyl acetate and 2.5 WT% of cohesive force JL-WT antistatic agent, and the mixture is coated on a TPU substrate layer and cured to form the TPU substrate layer.
(2) Coating a layer of silica gel pressure-sensitive adhesive on the PET substrate, and compounding one surface with the silica gel pressure-sensitive adhesive with the antistatic fluorine-containing polyurethane resin layer in the using layer obtained in the step (1) to obtain the using layer compounded with the first protective film;
the first protective film is an adhesive layer compounded on the antistatic fluorine-containing polyurethane resin layer and a PET substrate layer compounded on the adhesive layer; the adhesive layer has a thickness of 10 μm, a peeling force from the antistatic fluorine-containing polyurethane resin layer of 5gf/25mm, and a peeling force from the PET substrate layer of 15gf/25 mm.
(3) And (3) compounding the antistatic silica gel layer in the using layer compounded with the first protective film obtained in the step (2) with the fluoroplastic PET release film to obtain the functional soft protective film.
Example 2
(1) Coating a layer of silica gel containing 3 WT% of antistatic agent (Basff VS03 antistatic agent) on one side of a TPU substrate, and coating a layer of fluorine-containing polyurethane resin containing 2 WT% of antistatic agent (poly JL-WT antistatic agent) on the other side, wherein the silica gel containing 3 WT% of antistatic agent is baked for 90s at 170 ℃; baking the fluorine-containing polyurethane resin containing 2 wt% of the antistatic agent at 100 ℃ for 75s, and curing to obtain a use layer;
the using layer is of a three-layer structure of an antistatic silica gel layer, a TPU substrate layer and an antistatic fluorine-containing polyurethane resin layer which are sequentially compounded, wherein the thickness of the antistatic silica gel layer is 30 micrometers, and the stripping force is 100gf/25 mm; the thickness of the TPU substrate layer is 100 mu m; the thickness of the antistatic fluorine-containing polyurethane resin layer is 20 μm, and the preparation method is as follows: 10 parts by weight of resin composition is prepolymer formed by hexafluoropentanediol, 10 parts by weight of curing agent hexamethylene diisocyanate, 3 parts by weight of solvent ethyl acetate and 2 WT% of polymeric force JL-WT antistatic agent, and the mixture is coated on a TPU substrate layer and cured.
(2) Coating a layer of silica gel pressure-sensitive adhesive on the PET substrate, and compounding one surface with the silica gel pressure-sensitive adhesive with the antistatic fluorine-containing polyurethane resin layer in the using layer obtained in the step (1) to obtain the using layer compounded with the first protective film;
the first protective film is an adhesive layer compounded on the antistatic fluorine-containing polyurethane resin layer and a PET substrate layer compounded on the adhesive layer; the adhesive layer has a thickness of 10 μm, a peeling force from the antistatic fluorine-containing polyurethane resin layer of 5gf/25mm, and a peeling force from the PET substrate layer of 15gf/25 mm.
(3) And (3) compounding the antistatic silica gel layer in the using layer compounded with the first protective film obtained in the step (2) with the fluoroplastic PET release film to obtain the functional soft protective film.
Example 3
(1) Coating a layer of silica gel containing 2 WT% of antistatic agent (Basff VS03 antistatic agent) on one side of a TPU substrate, and coating a layer of fluorine-containing polyurethane resin containing 3 WT% of antistatic agent (poly JL-WT antistatic agent) on the other side, wherein the silica gel containing 3 WT% of antistatic agent is baked for 90s at 170 ℃; baking the fluorine-containing polyurethane resin containing 3 wt% of the antistatic agent at 100 ℃ for 75s, and curing to obtain a use layer;
the using layer is of a three-layer structure of an antistatic silica gel layer, a TPU substrate layer and an antistatic fluorine-containing polyurethane resin layer which are sequentially compounded, wherein the thickness of the antistatic silica gel layer is 20 micrometers, and the stripping force is 100gf/25 mm; the thickness of the TPU substrate layer is 300 mu m; the thickness of the antistatic fluorine-containing polyurethane resin layer is 20 μm, and the preparation method is as follows: 10 parts by weight of resin composition is a prepolymer formed by hexafluoropentanediol, 10 parts by weight of curing agent hexamethylene diisocyanate, 3 parts by weight of solvent ethyl acetate and 2.5 WT% of cohesive force JL-WT antistatic agent, and the mixture is coated on a TPU substrate layer and cured to form the TPU substrate layer.
(2) Coating a layer of silica gel pressure-sensitive adhesive on the PET substrate, and compounding one surface with the silica gel pressure-sensitive adhesive with the antistatic fluorine-containing polyurethane resin layer in the using layer obtained in the step (1) to obtain the using layer compounded with the first protective film;
the first protective film is an adhesive layer compounded on the antistatic fluorine-containing polyurethane resin layer and a PET substrate layer compounded on the adhesive layer; the adhesive layer has a thickness of 10 μm, a peeling force from the antistatic fluorine-containing polyurethane resin layer of 5gf/25mm, and a peeling force from the PET substrate layer of 15gf/25 mm.
(3) And (3) compounding the antistatic silica gel layer in the using layer compounded with the first protective film obtained in the step (2) with the fluoroplastic PET release film to obtain the functional soft protective film.
Comparative example 1
The functional flexible protective film prepared by the preparation method provided in example 1 is different from the functional flexible protective film prepared by the preparation method provided in example 1 in that: coating one side of a TPU substrate with a layer of silica gel without an antistatic agent, and coating the other side of the TPU substrate with a layer of fluorinated polyurethane resin containing 5WT% of an antistatic agent (poly JL-WT antistatic agent), wherein the silica gel without the antistatic agent is baked for 90s at 170 ℃; the fluorinated polyurethane resin containing 5wt% of the antistatic agent was baked at 100 ℃ for 75 seconds, and cured to obtain a use layer.
Comparative example 2
The functional flexible protective film prepared by the preparation method provided in example 1 is different from the functional flexible protective film prepared by the preparation method provided in example 1 in that: coating a layer of silica gel containing 5wt% of antistatic agent (Basff VS03 antistatic agent) on one side of a TPU substrate, and coating a layer of fluorinated polyurethane resin without the antistatic agent on the other side of the TPU substrate; the silica gel containing 5wt% of the antistatic agent is baked at 170 ℃ for 90 s; the fluorinated polyurethane resin without the antistatic agent is baked at 100 ℃ for 75s, and a using layer is obtained after curing.
Comparative example 3
The functional flexible protective film prepared by the preparation method provided in example 1 is different from the functional flexible protective film prepared by the preparation method provided in example 1 in that: coating a layer of silica gel without an antistatic agent on one surface of a TPU substrate, and coating a layer of fluorinated polyurethane resin without an antistatic agent on the other surface of the TPU substrate; baking the silica gel without the antistatic agent at 170 ℃ for 90 s; the fluorinated polyurethane resin without the antistatic agent is baked at 100 ℃ for 75s, and a using layer is obtained after curing.
Testing various performances of the functional soft protective films provided by the embodiments 1-3 and the comparative examples 1-3, wherein the antistatic effect test standard is GB/T1410-2006; water contact Angle testing was performed according to ASTM D5946-2004. The test results are shown in table 1.
TABLE 1 data of various properties of functional flexible protective films provided in examples 1 to 3 of the present invention and comparative examples 1 to 3
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A functional soft protective film comprises a first protective film, a use layer and a second protective film;
the use layer comprises:
the antistatic silica gel layer is compounded on the second protective film;
the first base material layer is compounded on the antistatic silica gel layer;
an antistatic organic fluorine resin layer compounded on the first substrate layer;
the first protection film includes:
an adhesive layer compounded on the antistatic organic fluorine resin layer;
a second substrate layer compounded on the adhesive layer;
the thickness of the antistatic organic fluorine resin layer is 20-30 μm; the antistatic silica gel layer is formed by curing silica gel containing 0.5-5 wt% of antistatic agent, and the antistatic organic fluorine resin layer is formed by curing resin containing 0.5-5 wt% of antistatic agent;
the preparation method of the functional soft protective film comprises the following steps:
a) coating one surface of the first base material layer with a layer of silica gel containing 0.5-5 wt% of antistatic agent, coating the other surface with a layer of resin containing 0.5-5 wt% of antistatic agent, and curing to obtain a use layer; the resin containing 0.5-5 wt% of antistatic agent is fluorinated polyurethane resin; the fluorine-containing polyurethane resin consists of a prepolymer formed by hexafluoropentanediol and toluene diisocyanate, a curing agent hexamethylene diisocyanate, a solvent ethyl acetate and an antistatic agent;
b) compounding an adhesive layer on the surface of the second base material layer, and compounding the adhesive layer with the antistatic organic fluorine resin layer in the using layer obtained in the step a) to obtain the using layer compounded with the first protective film;
c) compounding the antistatic silica gel layer in the using layer compounded with the first protective film obtained in the step b) with a second protective film to obtain the functional soft protective film.
2. The functional soft protective film according to claim 1, wherein the antistatic agent comprises one or more of poly JL-XS antistatic agent, basf VS03 antistatic agent, and poly JL-WT antistatic agent.
3. The functional flexible protective film according to claim 1, wherein the antistatic silicone layer has a thickness of 10 μm to 50 μm and a peel force of 1gf/25mm to 200gf/25 mm.
4. The functional flexible protective film according to claim 1, wherein the first substrate layer is selected from a PE substrate, a TPU substrate, or a PVC substrate; the thickness of the first base material layer is 100-300 mu m.
5. The functional flexible protective film according to claim 1, wherein the adhesive layer is formed by curing adhesive layer glue, and the adhesive layer glue is a silicone pressure sensitive adhesive or a low-viscosity polyacrylate glue; the thickness of the adhesive layer is 5-15 μm.
6. The functional flexible protective film according to claim 1, wherein a peeling force between the adhesive layer and the antistatic organic fluororesin layer is 1gf/25mm to 10gf/25mm, and a peeling force between the adhesive layer and the second substrate layer is 11gf/25mm to 20gf/25 mm.
7. The functional flexible protective film according to claim 1, wherein the curing temperature of the silica gel containing 0.5wt% to 5wt% of the antistatic agent in the step a) is 120 ℃ to 200 ℃, and the curing time is 60s to 100 s; the resin containing 0.5-5 wt% of antistatic agent is cured at the temperature of 70-150 ℃ for 60-100 s.
8. The functional flexible protective film according to claim 1, wherein the second protective film in step c) is selected from a fluoroplastic release film, a silicone oil release film or a non-silicone release film; the base material of the second protective film comprises one or more of PET, PE, OPP, BOPET and BOPP.
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| CN113930179A (en) * | 2020-06-29 | 2022-01-14 | 华为技术有限公司 | Protection film, flexible screen module and electronic equipment of flexible screen |
| CN113249050A (en) * | 2021-04-29 | 2021-08-13 | 东莞市齐信兴科技有限公司 | 3D full-curved-surface glass film full-adhesive antistatic adhesive and application thereof |
| CN114605930A (en) * | 2022-02-18 | 2022-06-10 | 惠州市诺曼包装材料有限公司 | Preparation method and processing method of multilayer PET antistatic silica gel protective film |
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