JP2006206782A - Functional film for attaching to flat display and method for attaching the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a functional film for attaching to a flat display, which has good attaching workability, can be positioned at an attaching position in good accuracy, and can prevent the intrusion of air, and to provide a method for attaching the film. <P>SOLUTION: This functional film 10 for attaching to the flat display, which is attached to the attaching surface of the flat display as an adherend to develop functions such as a light reflection-preventing function and a UV light-absorbing function, is characterized by disposing a functional layer 12 on one side of a substrate film layer 11, making a protecting layer 14 adhere to the function layer 12 through the second adhesive layer 13, disposing the first adhesive layer 15 on the other side of the substrate film layer 11, disposing a release layer 16 on the first adhesive layer 15, dividing the first adhesive layer 15 into a temporal tacking adhesive layer 15a and a main tacking adhesive layer 15b, disposing a temporal releasing layer 16a on the temporal tacking adhesive layer 15a, and disposing a main tacking release layer 16b on the main tacking adhesive layer 15b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a functional film for attaching a flat display to a flat display such as a mobile phone, a tablet PC, a PDA (Personal Digital assistants), and a digital camera, and a method for attaching the functional film.

  Functional films include vehicles, automobiles, airplanes, buildings, personal computer displays (CRT, liquid crystal, electroluminescence, etc.), mobile terminals (tablet PC, PDA, etc.), TVs (CRT, liquid crystal, electroluminescence, plasma, etc.) Used by sticking to the sticking surface of products such as instruments and machines. Various functions such as an anti-reflection function, an electromagnetic shielding function, and an anti-fogging function are imparted to the application surface of the product. When a functional film is applied to a flat display, depending on the feeling of the person performing the application, the application cannot be performed stably at a fixed position, and air bubbles remain in the application surface. There is a tendency to lower.

  As a functional film for attaching a flat display, there is conventionally known a functional film provided on one side of a base film and a release film layer provided on the other side through an adhesive layer. This functional film for affixing a flat display should be moved so that the film is placed and slid on the flat display if there is no adhesive layer when the release film layer is peeled off and the adhering operation to the adherend is performed. With this, accurate alignment can be performed. However, in order to fix the functional film on the flat display, an adhesive layer is essential, and it is difficult to accurately position the functional film on the affixing surface of the flat display. That is, there is a problem that it is difficult to accurately apply the functional film to a desired position on the attaching surface of the flat display.

Therefore, proposals for improving this point have been made. That is, a method of attaching an optical functional film in which a pressure-sensitive adhesive is laminated on one side to a plate-like body, which includes a mounting table on which the plate-like body is mounted and a work table adjacent to the mounting table. (For example, refer to Patent Document 1). Then, in a state where the plate-like body is positioned and placed on the mounting table, the optical functional film is placed on the opening portion of the positioning film that is rotatably installed on the work table adjacent to the mounting table. Temporary adhesion on work bench. Next, the positioning film is reversed and rotated to the plate-like body side, and an optical functional film is attached to a desired position of the plate-like body.
Japanese Patent Laid-Open No. 8-283403 (2nd and 3rd pages)

  However, in the method for applying the optical functional film described in Patent Document 1, the opposite side of the optical functional film to the plate-like body is temporarily bonded to the temporary adhesive tape, the release film is peeled off, and the adhesive film is adhered. With the agent layer exposed, the positioning film is inverted and adhered to the plate-like body. Therefore, it is difficult to align the optical functional film with the plate-like body, and the alignment accuracy decreases. In addition, since the positioning film is inverted with the pressure-sensitive adhesive layer exposed, there is a problem that air is easily caught between the pressure-sensitive adhesive layer of the optical functional film and the plate-like body.

  Accordingly, an object of the present invention is to provide a functional film for attaching a flat display and an attaching method thereof, which has good attaching workability, good attaching position positioning accuracy, and can suppress air intrusion. There is.

  In order to achieve the above object, the functional film for attaching a flat display according to the first aspect of the present invention is applied to the attaching surface of the flat display as an adherend and exhibits a function. A film is provided with a functional layer on one surface of a base film layer, a first pressure-sensitive adhesive layer on the other surface, and a release layer on the first pressure-sensitive adhesive layer, wherein the first pressure-sensitive adhesive The layer is divided into a temporary adhesive layer and a temporary adhesive layer, a temporary adhesive layer is provided on the temporary adhesive layer, and an actual adhesive layer is provided on the temporary adhesive layer. It is characterized by providing.

  The functional film for attaching a flat display of the second invention is characterized in that, in the first invention, a protective layer for protecting the functional layer is provided on the functional layer.

  The functional film for affixing a flat display according to a third aspect of the present invention is the first or second aspect, wherein the first temporary adhesive layer is temporarily fixed to the total area of the first adhesive layer and the temporary adhesive layer in the first adhesive layer. The area ratio of the pressure-sensitive adhesive layer for use is 1 to 40%.

  The functional method for attaching a flat display sticking functional film according to a fourth aspect of the invention is a sticking method in which the functional film for sticking a flat display according to any one of the first to third aspects is attached to a sticking surface of a flat display as an adherend. In this method, the release layer side of the flat display sticking functional film is placed on the sticking surface of the flat display and positioned, and in that state, the temporary sticking release layer is peeled off to expose the temporary sticking adhesive layer. Adhere to the adhesive surface of the flat display, then peel off the permanent adhesive layer to expose the permanent adhesive layer, and move the permanent adhesive layer away from the temporary adhesive layer. It is characterized by sticking in order while degassing.

According to the present invention, the following effects can be exhibited.
In the functional film for flat display sticking of 1st invention, while providing a functional layer in one side of a base film layer and providing a 1st adhesive layer in the other side, it peels on the 1st adhesive layer The first adhesive layer is divided into a temporary adhesive layer and a permanent adhesive layer. A temporary fixing release layer is provided on the temporary fixing pressure-sensitive adhesive layer, and a permanent fixing release layer is provided on the temporary fixing pressure-sensitive adhesive layer.

  For this reason, when a functional film for attaching a flat display is applied to an adherend, the functional film is first positioned on the attachment surface of the adherend, and then the temporary release layer is peeled off in that state. The adhesive layer for fixing is exposed and adhered to the sticking surface of the adherend, and temporarily fixed. Next, the functional film can be adhered to the adherend surface of the adherend by peeling off the permanent adhesive layer and exposing the adhesive layer to adhere to the adherend surface of the adherend. Thus, by using the temporary tacking adhesive layer, the pasting workability is improved and the positioning accuracy of the pasting position can be improved. Moreover, since the functional film is temporarily fixed with the temporary adhesive layer, by sticking the first adhesive layer of the functional film in order from the position using the temporary adhesive layer. Intrusion of air between the adherend surface of the adherend and the functional film can be suppressed.

  In the functional film for attaching a flat display of the second invention, since the protective layer for protecting the functional layer is provided on the functional layer, in addition to the effect of the first invention, the functional layer is formed of the protective layer. Thus, the function of the functional layer can be sufficiently exhibited.

  In the functional film for attaching a flat display of the third invention, the ratio of the area of the adhesive layer for temporary fixing to the total area of the adhesive layer for temporary fixing and the adhesive layer for temporary fixing in the first adhesive layer is 1. It is set to ~ 40%. Accordingly, in addition to the effects of the first or second invention, the temporary fixing effect by the temporary fixing adhesive layer can be obtained, and the permanent fixing effect by the permanent adhesive layer can be sufficiently exhibited. it can.

  In the method of applying the functional film for attaching a flat display of the fourth invention, the release layer side of the functional film for attaching a flat display is positioned on the attaching surface of the flat display. In this state, the temporary fixing release layer is peeled off to expose the temporary fixing adhesive layer and adhere to the sticking surface of the flat display. Next, peel off the permanent adhesive layer to expose the permanent adhesive layer, and apply the permanent adhesive layer in order while degassing from the side closer to the temporary adhesive layer. wear. Thus, the functional film for flat display sticking can be easily stuck on the sticking surface of the adherend, and the effects of any one of the first to third inventions can be exhibited.

Hereinafter, embodiments of the present invention will be described in detail.
First, the functional film for attaching a flat display of this embodiment will be described.
The functional film for attaching a flat display according to the present embodiment is a film that is attached to an attaching surface of an adherend and exhibits functions such as light reflection prevention, ultraviolet absorption, and electromagnetic wave shielding. As shown in FIGS. 1A, 1B, and 1C, a functional film for attaching a flat display (hereinafter, also simply referred to as a functional film) 10 has a flat rectangular shape, and one of the base film layers 11 is used. The functional layer 12 is provided on the surface (upper surface), and the protective layer 14 is provided on the functional layer 12 via the second pressure-sensitive adhesive layer 13. A first pressure-sensitive adhesive layer 15 is provided on the other surface (lower surface) of the base film layer, and a release layer 16 is provided on the first pressure-sensitive adhesive layer 15. The first adhesive layer 15 is divided into a temporary adhesive layer 15a and a permanent adhesive layer 15b. A temporary fixing release layer 16a is provided on the temporary fixing pressure-sensitive adhesive layer 15a, and a permanent fixing release layer 16b is provided on the temporary fixing pressure-sensitive adhesive layer 15b. A notch 17 is provided between the temporary fastening release layer 16a and the final fastening release layer 16b so that the temporary fastening release layer 16a and the final fastening release layer 16b can be peeled independently. . In addition, the functional film 10 is drawn exaggerating the thickness to be thicker than the actual thickness for easy understanding in each drawing.

  Then, when the functional film 10 is applied to the application surface 20 of the flat display 19 as an adherend, positioning is performed by placing the release layer 16 side on the application surface 20, and then the temporary attachment release layer 16 a is temporarily attached. It peels from the adhesive layer 15a for a stop, and it affixes on the flat display 19 and temporarily fixes. Thereafter, the permanent release release layer 16b is peeled off from the permanent release adhesive layer 15a, and can be attached to a desired position by taking a two-step application method of applying it to the application surface 20. Therefore, the temporary fixing pressure-sensitive adhesive layer 15a side of the functional film 10 becomes the temporary fixing portion 10a, and the permanent fixing pressure-sensitive adhesive layer 15b side becomes the final fixing portion 10b.

  As the base film layer 11, a conventionally known film can be selected and used as long as it satisfies the above conditions. For example, polyethylene resin, polypropylene resin, polyester resin, nylon resin, polyamide resin, polyimide resin, polycarbonate resin, polystyrene resin, polyvinyl alcohol resin, polysulfone resin, norbornene resin, acrylic resin Examples thereof include synthetic resin films such as resins, cellulose resins, and polyvinyl chloride resins. Among these, a film of polyester resin, acrylic resin or cellulose resin is preferable from the viewpoint of transparency and versatility, and specifically, polyethylene terephthalic acid (PET), polybutylene terephthalic acid (PBT), polymethacrylic resin are preferable. Examples thereof include films of acid alkyl, triacetyl cellulose (TAC) and the like. The thickness is preferably 10 to 3000 μm, more preferably 10 to 500 μm, and still more preferably 25 to 200 μm. If the thickness is less than 10 μm, the film is too thin and too soft, so that it is difficult to apply each layer such as the functional layer 12 or to attach the functional film 10 to the flat display 19. On the other hand, when the thickness exceeds 3000 μm, the film becomes unnecessarily thick and becomes heavy, and in addition to the lack of flexibility, there is a tendency to hinder the work of attaching the functional film 10 to the flat display 19.

  As the functional layer 12, any conventionally known one can be used, and is not particularly limited. For example, a hard coat layer, an electromagnetic wave shielding layer, an infrared absorbing layer, an ultraviolet absorbing layer, a visible light absorbing layer, and a light reflection preventing layer. Examples thereof include a layer, a visibility control layer, a polarizing layer, an antiglare layer, an antistatic layer, an antifogging layer, an antifouling layer, and a layer in which the writing quality with a pen for a pen input device is appropriate. One type or two or more types selected from these functional layers 12 are used. As a specific example, for example, the hard coat layer may be “an active ingredient containing a polyfunctional monomer having 6 acryloyl groups in one molecule as the A component and a polyfunctional monomer having 2 B components. Examples thereof include a cured film having a pencil hardness of 2H or more obtained by polymerizing and curing an energy ray-curable coating liquid.

  As the light reflection preventing layer, “a fluorine-containing polyfunctional (meth) acrylic acid ester as component A and colloidal silica modified with at least one of a (meth) acryloyloxy group and a fluorine group-containing silane coupling agent as component B. A fluorine-containing resin cured film obtained by polymerizing and curing a fluorine-containing curable coating liquid containing ”. Furthermore, the following coating films are mentioned as a functional layer which made the writing taste with the pen for pen input devices appropriate. That is, “it is made of a soft resin having self-healing properties and has a dent of 0.2 to 20 seconds when it is moved at a load of 200 g and a speed of 10 cm / second in an atmosphere of 20 ° C. and 50% relative humidity. It is a coating film that is restored in time and has a dynamic friction coefficient of 0.02 to 0.6 and a static friction coefficient of 0.3 to 2.

  The thickness of the functional layer 12 is not particularly limited as long as it is a thickness necessary for developing various functions, but is usually 0.02 to 1000 μm, preferably 0.05 to 500 μm, more preferably 0.05. ~ 200 μm. If the thickness is less than 0.02 μm, it tends to be insufficient for expressing the function, and if it exceeds 1000 μm, the function is insufficient for expressing the function, which may cause waste.

  As the release layer 16, any of those similar to those conventionally used in this type of functional film 10 can be used. For example, it is possible to use paper, plastic, fiber, metal, etc. film having good releasability treated with a known release agent such as silicone, wax, fluorine resin, or a synthetic resin film that can be peeled off. The thickness is usually 5 to 300 μm, preferably 10 to 200 μm.

  Further, as described above, the release layer 16 is provided with the notches 17 so as to be divided into the temporary fix release layer 16a and the final fix release layer 16b. Then, when the functional film 10 is applied to the application surface 20 of the flat display 19, positioning is performed, and the temporary adhesive release layer 16a is attached to the first adhesive while pressing the functional film 10 by hand or the like so as not to be displaced. The application position is determined by peeling off the agent layer 15 and applying it to the application surface 20. The size of the divided temporary fixing release layer 16a may be any size as long as it satisfies the above-described operation, but the width of the temporary fixing release layer 16a is preferably 1 mm or more, more preferably 3 mm or more, Preferably it is 5 mm or more. If the width is less than 1 mm, the adhesive strength for holding the determined position is insufficient, and for example, there is a high possibility that the functional film 10 will be peeled off during the pasting operation after peeling the next permanent release layer 16b. Tend to be.

  The upper limit is determined in consideration of the following points. That is, in the area ratio of the temporary adhesive layer 15a and the temporary adhesive layer 15b, the temporary adhesive layer 15a is affixed temporarily, so that the repositioning is inappropriate when the positioning of the adhesive is inappropriate. In addition, it is determined from the viewpoint of suppressing the remaining of bubbles in the affixing surface 20 of the functional film 10 that has been applied up to the affixing adhesive layer 15b side. Therefore, the temporary adhesive layer 15a preferably has a smaller area than the permanent adhesive layer 15b. Specifically, the temporary adhesive layer 15b and the temporary adhesive are satisfying the preferable width. The ratio of the area of the temporary fixing pressure-sensitive adhesive layer 15a to the total area with the agent layer 15a is preferably 1 to 40%, more preferably 1 to 30%, and still more preferably 1 to 20%. When the ratio exceeds 40%, it is difficult to re-apply when the positioning of the temporary fixing release layer 16a side is inappropriate, and bubbles are formed in the application surface 20 at the end of application of the functional film 10. The probability of remaining tends to increase. Each of the temporary fastening release layer 16a and the final fastening release layer 16b may be provided with a process such as mounting a tab for making each layer easy to peel off or making a cut.

  Adhesive force between the release layer 16 and the base film layer 11 adhered by the first adhesive layer 15 (hereinafter, also simply referred to as an adhesive force between the release layer 16 and the base film layer 11. Other portions) The adhesive strength of is sometimes expressed in the same manner.) Is preferably 5 to 1000 mN / 25 mm, more preferably 5 to 500 mN / 25 mm, and still more preferably 5 to 300 mN / 25 mm. If the adhesive strength is less than 5 mN / 25 mm, the adhesive strength is too low, and the release layer 16 tends to peel naturally from the base film layer 11 during the operation, which is not preferable. On the other hand, when it exceeds 1000 mN / 25 mm, the peeling layer 16 tends to be difficult to peel from the base film layer 11, which is not preferable from the viewpoint of workability.

  As the pressure-sensitive adhesive forming the first pressure-sensitive adhesive layer 15, any of those conventionally used in this type of film can be used. For example, rubber adhesive, acrylic adhesive, silicone adhesive, vinyl adhesive, polyester resin adhesive, epoxy resin adhesive, polyacetic acid resin adhesive, polyvinyl chloride resin adhesive, etc. Can be used. An acrylic pressure-sensitive adhesive is preferably used from the viewpoint of transparency, and a silicone pressure-sensitive adhesive is preferably used from the viewpoint of removability. These pressure-sensitive adhesives can contain a plasticizer, a tackifier component, and the like in addition to the polymer component, but it is more desirable to use them so as not to impair the transparency. Examples of the adhesive polymer that is the main component of the acrylic adhesive include 2-ethylhexyl acrylate, butyl acrylate, isooctyl acrylate, butyl methacrylate, propyl methacrylate, and other alkyl alcohols having 1 to 10 carbon atoms. And a copolymer of an alkyl ester of (meth) acrylic acid and a functional group-containing unsaturated monomer such as acrylic acid, methacrylic acid, maleic acid, fumaric acid, hydroxyethyl acrylate, hydroxyethyl methacrylate, etc. . As the adhesive polymer which is the main component of the rubber adhesive, a styrene-butadiene random copolymer, a styrene-isoprene block copolymer, natural rubber and the like are preferably used.

  The thickness of the 1st adhesive layer 15 becomes like this. Preferably it is 1-100 micrometers, More preferably, it is 1-80 micrometers. When the thickness is less than 1 μm, the strength of the first pressure-sensitive adhesive layer 15 is insufficient, and the structure is liable to break down due to external force (cohesive failure). On the other hand, when the thickness exceeds 100 μm, the first pressure-sensitive adhesive layer The performance of the layer 15 is sufficient and does not need to be thicker.

  The protective layer 14 is provided for the purpose of protecting the functional layer 12 and can be used as necessary. The adhesive force between the protective layer 14 adhered by the second adhesive layer 13 and the functional layer 12 is the adhesive force between the flat display 19 adhered by the first adhesive layer 15 and the base film layer 11. Is preferably smaller. Thereby, after sticking the functional film 10 to the flat display 19, the protective layer 14 can be peeled from the functional layer 12. As long as the protective layer 14 can be attached to and peeled from the functional layer 12 as described above, a conventionally known film can be selected and used. For example, polyester resins such as polyethylene terephthalate, polyolefin resins such as polyethylene and polypropylene, films of acrylic resins, polyvinyl chloride resins, and the like can be given. The thickness is preferably 5 to 300 μm, more preferably 20 to 200 μm. If the thickness is less than 5 μm, the strength as the protective layer 14 becomes insufficient, and the purpose of protecting the functional layer 12 cannot be achieved. On the other hand, when it exceeds 300 μm, the function as the protective layer 14 is sufficient, and it becomes unnecessarily thick and wasteful. Further, the protective layer 14 may be subjected to processing for facilitating peeling such as attaching a tab or making a cut.

  As the pressure-sensitive adhesive forming the second pressure-sensitive adhesive layer 13, any known pressure-sensitive adhesive can be used and is not particularly limited. For example, an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, an olefin-based pressure-sensitive adhesive, or the like can be used as the pressure-sensitive adhesive, but when the protective layer 14 is peeled off from the functional layer 12, the pressure-sensitive adhesive is a functional layer. It is preferable that the adhesive layer does not remain on the surface of the adhesive layer 12 and has an adhesive force that allows the functional layer 12 to exhibit its intended function. These pressure-sensitive adhesives can contain a plasticizer, a tackifier component and the like in addition to the pressure-sensitive polymer component, but it is more desirable to use them so as not to impair the transparency. Examples of the adhesive polymer that is the main component of the acrylic adhesive include 2-ethylhexyl acrylate, butyl acrylate, isooctyl acrylate, butyl methacrylate, propyl methacrylate, and other alkyl alcohols having 1 to 10 carbon atoms. And a copolymer of an alkyl ester of (meth) acrylic acid and a functional group-containing unsaturated monomer such as acrylic acid, methacrylic acid, maleic acid, fumaric acid, hydroxyethyl acrylate, hydroxyethyl methacrylate, etc. . As the adhesive polymer which is the main component of the rubber adhesive, a styrene-butadiene random copolymer, a styrene-isoprene block copolymer, natural rubber and the like are preferably used. As the olefin-based adhesive, an ethylene-vinyl acetate copolymer, a vinyl chloride-vinyl acetate copolymer, or the like is preferably used.

  The thickness of the 2nd adhesive layer 13 by these components is 1-150 micrometers normally, Preferably it is 2-100 micrometers. When the thickness is less than 1 μm, the adhesive strength of the second pressure-sensitive adhesive layer 13 is insufficient, and tends to peel (cohesive failure) due to external force. When the thickness exceeds 150 μm, the pressure-sensitive adhesive This is sufficient as the performance, and if it is thicker than that, there is a risk of waste.

  Further, as pretreatment for increasing the adhesive force of the second pressure-sensitive adhesive layer 13 to the protective layer 14, chemical treatment such as etching treatment, physical treatment such as plasma treatment and sputtering treatment, mechanical treatment such as sand blasting and shot blasting. It is also preferable to carry out the treatment. In addition, the 2nd adhesive layer 13 uses the protective film united with the normal protective layer 14 normally. As the protective film, for example, Sanei Kaken Co., Ltd. (N15, WS26F, Y37PH, PAC2-70, PAC3-70, PAC3-60T, PAC4-60, SAT106T, SAT116T), Sekisui Chemical Co., Ltd. protective tape ( # 6322B, # 6221F, # 6322C, # 622AX, # 625T), E-mask (RB-100, RB200S) manufactured by Nitto Denko Corporation, Hitachilex (DP-1010) manufactured by Hitachi Chemical Co., Ltd., and the like.

  As described above, the second pressure-sensitive adhesive layer 13 can be provided on the entire surface of the functional film 10 or partially. As an example of partially providing the second pressure-sensitive adhesive layer 13, the second film is formed around the functional film 10 with a specific width. It is also possible to provide the pressure-sensitive adhesive layer 13. In that case, in addition to coating or transferring the pressure-sensitive adhesive, it is also possible to affix a double-sided tape around the functional film 10. The specific width here is not particularly limited as long as an adhesive force fixed to the flat display 19 is obtained, but it is preferably 1 mm or more, more preferably 2 mm or more, from the viewpoint of adhesive saving and operability. Preferably it is 3 mm or more. If the width is less than 1 mm, an adhesive force fixed to the flat display 19 cannot be obtained, and there is a tendency to peel off, which is not preferable. Further, the second pressure-sensitive adhesive layer 13 is preferably colorless and transparent and does not obstruct the field of view. For example, in the case of a double-sided tape, there are many inferior transparency, and in that case, the upper limit of the width is preferable. Is 10 mm or less, more preferably 5 mm or less. If the width exceeds 10 mm, the field of view is often blocked, and the information in the screen of the flat display 19 tends to be difficult to see.

  The adhesive force between the functional layer 12 adhered by the second pressure-sensitive adhesive layer 13 and the protective layer 14 is determined by the bonding surface 20 of the flat display 19 adhered by the first pressure-sensitive adhesive layer 15 and the base film layer 11. It is preferably set so as to be smaller than the adhesive strength between them. In that case, when the protective layer 14 is peeled off from the functional layer 12, the base film layer 11 can be easily peeled off without being peeled off from the affixing surface 20 of the flat display 19.

The functional film 10 for attaching a flat display is attached to the attaching surface 20 of the flat display 19 by the following procedure.
(1) The release layer 16 of the functional film 10 is placed on the sticking surface (screen) 20 of the flat display 19 and positioned.
(2) Subsequently, the temporary fixing release layer 16a is peeled off by fixing the position, and the temporary fixing pressure-sensitive adhesive layer 15a that appears thereby is applied to the application surface 20 of the flat display 19 and temporarily fixed.
(3) Next, the temporary fixing portion 10a is fixed and the permanent adhesive release layer 16b is peeled off. The permanent adhesive layer 15b that appears thereby is attached to the temporary adhesive portion 10a applied in the procedure of (2). Affix in order from the near side to the far side.

  A tool such as a spatula may be used in order to perform such a pasting operation easily and quickly. Such a tool is not particularly limited as long as it facilitates the pasting operation, and any tool can be used. Examples of tools that replace the spatula include paper, plastic, and cloth. Moreover, about those shapes, as long as it is a shape which can assist the said sticking operation | work, any shape may be sufficient.

  The functional film 10 is affixed on the affixing surface 20 of the flat display 19 by the above procedure. When the functional film 10 has the protective layer 14, the protective layer 14 is a functional layer after being affixed to the flat display 19. The functional film 10 is utilized after being peeled from the film 12. Therefore, the adhesive force between the base film layer 11 adhered by the first adhesive layer 15 and the affixing surface 20 of the flat display 19 is such that the protective layer 14 and the functional layer 12 adhered by the second adhesive layer 13. And greater than 20000 mN / 25 mm. In that case, peeling of the protective layer 14 from the functional layer 12 can be performed without peeling off the stuck functional film 10 from the sticking surface 20 of the flat display 19, and the function with respect to the sticking surface 20 of the flat display 19. Sufficient adhesion of the conductive film 10 is ensured.

  The adhesive force between the base film layer 11 adhered by the first adhesive layer 15 and the affixing surface 20 of the flat display 19 is such that the protective layer 14 and functional layer 12 adhered by the second adhesive layer 13. It is preferable that it is greater than the adhesive strength between and 5,000 mN / 25 mm or less. In that case, in addition to the above-described effects, the functional film 10 is set to have a low adhesive strength with respect to the application surface 20 of the functional film 10, that is, the adhesive force between the functional film 10 and the application surface 20 of the flat display 19. It becomes easy to extrude and remove the bubbles remaining at the time of sticking 10 with a spatula or the like while the functional film 10 is stuck. Furthermore, the adhesive force between the base film layer 11 adhered by the first adhesive layer 15 and the pasting surface 20 is between the protective layer 14 adhered by the second adhesive layer 13 and the functional layer 12. It is more preferable that the adhesive strength is greater than 1000 mN / 25 mm. Thereby, in addition to the above effect, by setting the adhesive force between the functional film 10 and the flat display 19 to a lower range, it is possible to more easily remove bubbles remaining when the functional film 10 is stuck. Can do.

Next, the effect | action of the functional film 10 for flat display sticking is demonstrated based on FIG.2 and FIG.3.
Now, as shown to Fig.2 (a), the functional film 10 is mounted on the sticking surface 20 of the flat display 19, and the functional film 10 is aligned, and it is set as the state shown in FIG.2 (b). This alignment operation can be easily and accurately performed because the first pressure-sensitive adhesive layer 15 is not exposed. Subsequently, in a state where the functional film 10 is pressed from above, as shown in FIG. 3 (a), the release layer 16a for temporary fixing of the functional film 10 is peeled off and appears as shown in FIG. 3 (b). The temporary tacking adhesive layer 15a is placed on the sticking surface 20 of the flat display 19, and the temporary tacking portion 10a is pressed to stick the temporary tacking adhesive layer 15a to the pasting surface 20 and temporarily fix it.

  Next, as shown in FIG. 3C, the main fastening portion 10b of the functional film 10 is lifted, and the main fastening release layer 16b on the lower surface thereof is peeled from the temporary fastening portion 10a side. Thereafter, as shown in FIG. 3 (d), the main fastening portion 10b of the functional film 10 is pressed from the side closer to the temporary fastening portion 10a to the side far from the temporary fastening portion 10a, that is, the affixing surface 20 of the flat display 19 and the functional film. The air (bubbles) are not entangled with the surface 10, and the surface is gradually attached to the attaching surface 20 of the flat display 19. By sticking in this way, air can be prevented from entering between the sticking surface 20 of the flat display 19 and the functional film 10.

  And as shown in FIG.3 (e), the functional film 10 can be easily and correctly affixed on the predetermined position of the sticking surface 20 of the flat display 19 by peeling the protective layer 14 from the functional layer 12. FIG.

The effects exhibited by the above embodiment will be described collectively below.
-In the functional film 10 of this embodiment, while providing the functional layer 12 in one surface of the base film layer 11, providing the 1st adhesive layer 15 in the other surface, on the 1st adhesive layer 15 A release layer 16 is provided, and the first adhesive layer 15 is divided into a temporary adhesive layer 15a and a permanent adhesive layer 15b. A temporary fixing release layer 16a is provided on the temporary fixing pressure-sensitive adhesive layer 15a, and a permanent fixing release layer 16b is provided on the temporary fixing pressure-sensitive adhesive layer 15b.

  For this reason, when affixing the functional film 10 to the affixing surface 20 of the flat display 19, first, after positioning the functional film 10 on the affixing surface 20, the release layer 16a for temporary attachment is peeled off, and the adhesive for temporary attachment is removed. The adhesive layer 15a is adhered to the application surface 20 and temporarily fixed, and then the permanent adhesive release layer 16b is released, and the actual adhesive layer 15b is adhered to the adhesive surface 20. As described above, by using the temporary adhesive layer 15a, it is possible to improve the pasting workability and improve the positioning accuracy of the pasting position. In addition, since the functional film 10 is temporarily fixed with the temporary adhesive layer 15a, the main adhesive layer 15b is pasted in order from the position using the temporary adhesive layer 15a. Intrusion of air between the pasting surface 20 and the functional film 10 can be suppressed.

  Moreover, since the protective layer 14 for protecting the functional layer 12 is adhered to the functional layer 12 by the second pressure-sensitive adhesive layer 13, the functional layer 12 can be protected by the protective layer 14, and the function The function of the layer 12 can be sufficiently exhibited.

  In addition, by setting the ratio of the area of the temporary adhesive layer 15a to the total area of the temporary adhesive layer 15b and the temporary adhesive layer 15a to 1 to 40%, the temporary adhesive The temporary fixing effect by the agent layer 15a can be obtained, and the permanent fixing effect by the permanent adhesive layer 15b can be sufficiently exhibited.

Hereinafter, the embodiment will be described more specifically with reference to examples and comparative examples. The adhesive strength at each interface was measured by the following method.
(1) Adhesive force between the adhesive surface 20 of the flat display 19 adhered by the first adhesive layer 15 and the base film layer 11 is a functional film which is cut into 25 mm length and 250 mm width and the release layer 16 is peeled off. 10 was used as a test piece. Further, as the flat display 19, a liquid crystal display of a tablet PC (Daybook SS 3500 DSIEP / 2 manufactured by Toshiba Corporation) or a PDA (CLIE PEG-TJ25 manufactured by Sony Corporation) was used as a test plate. On the test plate, a test piece was pressure-bonded using a rubber roller to prepare a test sample. After the crimping, a 90 ° peel adhesive strength was measured using a tensile tester (product number: STA-1150 manufactured by Orientec Co., Ltd.) at a test speed of 50 mm / min in accordance with ISO 8510-1.
(2) Adhesive force between the functional layer 12 adhered by the second pressure-sensitive adhesive layer 13 and the protective layer 14 As the protective layer 14, the test piece was cut into 25 mm length and 250 mm width, and a glass plate (50 mm length, The same method as in (1) above, except that a functional film of the same size as the glass plate was attached to one side (150 mm wide and 2 mm thick) and the four sides were fixed with cello tape (registered trademark) to form a test plate. Measured with
Example 1
Cut layer 17 of RealLook 7702UV-S made by Nippon Oil Co., Ltd., cut to 246 mm in length and 185 mm in width, is cut into 17 (kiss cut, only the release layer 16 is cut), and the temporary release layer 16 a and the permanent release layer Separated as 16b. And it affixed on tablet PC (Daibook SS 3500 DSIEP / 2 by Toshiba Corporation) as follows.

  First, the temporary fixing release layer 16a side was positioned on the pasting surface 20 along the long side of the peripheral portion 21 of the pasting surface (liquid crystal screen) 20 and positioned. The temporary fixing release layer 16a was peeled off by fixing it by hand so that the position did not move, and the temporary fixing pressure-sensitive adhesive layer 15a that appeared was applied to the application surface. Next, while pressing the temporary fixing portion 10a by hand, the remaining release layer 16b for permanent fixing is peeled off, and the adhesive layer 15b for permanent fixing that has appeared is directed toward the side farther from the side closer to the temporary fixing portion 10a to which the temporary fixing portion 10a is applied. Affixed in order. Thereafter, the protective layer 14 was peeled off.

As a result, it was possible to stick without sticking out of the sticking surface 20 and with almost no bubbles. Moreover, the total time required for sticking was 1 minute 33 seconds, and it could be performed in a relatively short time. Furthermore, the adhesive strength of each interface evaluated under the evaluation conditions in Example 1 was as follows.
(1) The adhesive force between the pasting surface 20 of the flat display 19 adhered by the first adhesive layer 15 and the base film layer 11 is 3520 mN / 25 mm.
(2) The adhesive force between the functional layer 12 adhered by the second adhesive layer 13 and the protective layer 14 is 1730 mN / 25 mm.
(Example 2)
A kiss cut is put in the release layer 16 of PenFit 1002 manufactured by Nippon Oil & Fats Co., Ltd., which is cut to a length of 72 mm and a width of 57 mm, and affixed to a PDA (Cly PEG-TJ25 manufactured by Sony Corporation) “Turn the release layer 16a side along the long side of the peripheral portion 21 of the sticking surface (liquid crystal screen) 20” and “contact the release layer 16a for temporary fixing with the long side of the peripheral portion 21 of the sticking surface (liquid crystal screen) 20”. The procedure was the same as in Example 1 except that the change was made. As a result, it was possible to stick without sticking out of the sticking surface 20 and without any bubbles. Further, the total time required for sticking was 0 minute 55 seconds, which could be done in a relatively short time. Furthermore, the adhesive strength of each interface evaluated under the evaluation conditions in Example 2 was as follows.
(1) The adhesive force between the affixing surface 20 of the flat display 19 adhered by the first adhesive layer 15 and the base film layer 11 is 110 mN / 25 mm.
(2) The adhesive force between the functional layer 12 adhered by the second adhesive layer 13 and the protective layer 14 is 70 mN / 25 mm.
(Example 3)
According to Example 1 except that APF-A4 manufactured by Abel Co., Ltd. was used instead of ReaLook 7702UV-S manufactured by Nippon Oil & Fats Co., Ltd. of Example 1, there was almost no air bubbles protruding from the affixing surface 20. I was able to paste it. Moreover, the total time required for sticking was 1 minute 38 seconds, and it could be performed in a relatively short time. Furthermore, the adhesive strength of each interface evaluated under the evaluation conditions in Example 3 was as follows.
(1) The adhesive force between the pasting surface 20 of the flat display 19 adhered by the first adhesive layer 15 and the base film layer 11 is 60 mN / 25 mm.
(2) The adhesive force between the functional layer 12 and the protective layer 14 adhered by the second adhesive layer 13 is not measured because the protective layer 14 is not present.
(Comparative Example 1)
Abel Co., Ltd. APF-A4 is cut to 246 mm in length and 185 mm in width and kiss cut is not put on the releasable film layer, then pasted on tablet PC (Daibook SS 3500 DSIEP / 2 manufactured by Toshiba Corporation) I went to the street.

  First, the peeling layer of this film was peeled off and placed on the sticking surface 20 in a state where it was aligned with the peripheral portion 21 of the sticking surface 20, but the adhesive layer was stuck before setting it to the correct position. It took considerable time to adhere to the surface 20. After positioning, sticking was performed sequentially from the positioning location to the opposite side. Thereafter, the protective layer was peeled off.

  As a result, a part of the film protruded from the sticking surface 20 on the opposite side from the positioning location, and a large number of large and small bubbles entered the sticking surface 20, resulting in a very unfavorable appearance. Further, the time required for pasting was 3 minutes and 38 seconds, which required a considerable time as compared with each example. Every time it turns out that the functional film protrudes from the sticking frame in the latter half of the pasting after positioning because the initial positioning was not performed correctly in addition to the trouble of the first positioning. This is because the initial positioning is repeated. Nevertheless, a part of the functional film eventually protrudes from the sticking surface 20 and a large number of large and small bubbles enter the sticking surface 20, which is very unfavorable in appearance.

It should be noted that the present embodiment can be implemented with the following modifications.
-As shown to Fig.4 (a) and (b), in the said embodiment, the protective layer 14 and the 2nd adhesive layer 13 can also be abbreviate | omitted.

  -As shown in FIG. 5, the temporary fix | stop part 10a of the functional film 10 can also be provided in a long side. In this case, since the length of the temporary fix | stop part 10a is longer than the case of embodiment, the width | variety of the temporary fix | stop part 10a can be made shorter than the case of embodiment.

  As shown in FIG. 6A, when the corner (corner) of the sticking surface 20 of the flat display 19 is arcuate, the corner 10c of the functional film 10 can also be arcuately formed. preferable.

As shown in FIG. 6B, when the short side of the sticking surface 20 of the flat display 19 is an arc portion, it is preferable that the short side of the functional film is also an arc portion 10d corresponding thereto.
-In embodiment, it is also possible to form the sticking surface 20 of the flat display 19 lower than the peripheral part 21, or high.

A perforation may be provided at the boundary portion between the temporary fastening release layer 16a and the final fastening release layer 16b, or the portion may be thinly formed so as to be separable.
A gripping part that protrudes from the functional film 10 or a gripping part that is bent can be provided. In this case, the temporary fixing release layer 16a can be easily peeled off with the gripping part before temporary fixing.

Furthermore, the technical idea which can be grasped from the embodiment or another example will be described below.
The flat display pasting function according to any one of claims 1 to 3, wherein a boundary portion between the temporary fastening release layer and the final fastening release layer is configured to be separable. Sex film. When comprised in this way, the peeling layer for temporary fixing can be easily peeled at the time of temporary fixing.

  The functional film for attaching a flat display according to any one of claims 1 to 3, wherein a boundary portion between the temporary fastening release layer and the final fastening release layer is separated. When comprised in this way, the peeling layer for temporary fixing can be more easily peeled at the time of temporary fixing.

  The flat display in which the protective layer is adhered to the functional layer by the second adhesive layer, and the adhesive force between the functional layer and the protective layer adhered by the second adhesive layer is adhered by the first adhesive layer 4. The functional film for attaching a flat display according to claim 2, wherein the functional film is attached so as to be smaller than an adhesive force between the attachment surface and the base film layer. When comprised in this way, when peeling a protective layer from a functional layer, it can peel easily, without a base film layer peeling from the sticking surface of a flat display.

(A) is sectional drawing which shows the functional film for flat display sticking in embodiment, (b) is a top view of (a), (c) is a perspective view of the functional film for flat display sticking seen from the peeling layer side . (A) is a perspective view which shows the state before affixing a functional film on the sticking surface of a flat display, (b) is a perspective view which shows the state which mounted and aligned the functional film on the sticking surface of a flat display . (A)-(e) is a figure which shows the process of sticking a functional film on the sticking surface of a flat display in order, Comprising: (a) And (c) is a partially broken front view, (b), ( d) and (e) are front views. (A) is sectional drawing which shows the functional film in the other example of this invention, (b) is a top view of (a). The top view which shows the functional film in the other example of this invention. (A) And (b) is a partial top view which shows the functional film in the further another example of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Functional film for flat display sticking, 11 ... Base film layer, 12 ... Functional layer, 14 ... Protective layer, 15 ... 1st adhesive layer, 15a ... Adhesive layer for temporary fixing, 15b ... Adhesive for permanent fixing Agent layer, 16 ... release layer, 16a ... temporary release layer, 16b ... permanent release layer, 19 ... flat display as adherend, 20 ... pasting surface.

Claims (4)

A functional film for attaching a flat display that expresses a function by being attached to an attaching surface of a flat display as an adherend,
A functional layer is provided on one surface of the base film layer, a first pressure-sensitive adhesive layer is provided on the other surface, a release layer is provided on the first pressure-sensitive adhesive layer, and the first pressure-sensitive adhesive layer is temporarily fixed. It is divided into a pressure-sensitive adhesive layer and a pressure-sensitive adhesive layer for permanent fixing, and a temporary-fixing release layer is provided on the temporary-fixing pressure-sensitive adhesive layer, and a permanent-sticking release layer is provided on the temporary-fixing pressure-sensitive adhesive layer. Functional film for flat display sticking. The functional film for attaching a flat display according to claim 1, wherein a protective layer for protecting the functional layer is provided on the functional layer. The ratio of the area of the temporary adhesive layer to the total area of the temporary adhesive layer and the temporary adhesive layer in the first adhesive layer is 1 to 40%. Or the functional film for flat display sticking of Claim 2. A sticking method for sticking the functional film for attaching a flat display according to any one of claims 1 to 3 to an attaching surface of a flat display as an adherend,
Position and position the release layer side of the functional film for attaching a flat display on the attachment surface of the flat display, and in that state, peel off the temporary attachment layer to expose the adhesive layer for temporary attachment. Adhering to the surface, then peeling off the permanent adhesive layer to expose the permanent adhesive layer, degassing the permanent adhesive layer from the side closer to the temporary adhesive layer to the far side A method for attaching a functional film for attaching a flat display, wherein the functional films are attached in order.

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