JP2011056876A - Printing film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a film excellent in printing property as a glass window decoration film. <P>SOLUTION: The printing film for glass includes: a pressure-sensitive adhesive layer characterized in that the tensile modulus is 3 to 50 MPa, the MFR at 230°C is 1 to 100 g/10 min, the pressure-sensitive adhesive force (JIS Z0237) when being stuck onto the surface of a glass plate and, after standing for 60 min, being stripped from the surface of the glass plate is 0.3 to 50 N/25 mm; and a base material layer characterized in that the tensile modulus is 100 to 1,500 MPa, and the difference of the MFR at 230°C between the pressure-sensitive adhesive layer and the base material layer is 5 g/10 min or less, wherein the surface of the base material layer is surface-treated, the surface tension is 32 mN/m or more and the haze is 0 to 10%. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a glass window decorative film.

  In recent years, with the widespread use of inkjet printers, in the field of decorative films for glass windows used in show windows such as department stores and apparel stores, films having excellent visual reproducibility such as photographs are desired. On the other hand, for large signboards, there is a demand for affixing directly to glass windows due to the increase in the size of glass windows in buildings and the like.

  As the decorative film for a large glass window, an acrylic adhesive having excellent adhesive strength as shown in Patent Documents 1, 2, and 3 has been mainly used. However, the acrylic adhesive has a low cohesive force, and there is a problem that an adhesive residue is generated when peeling from the glass.

  Furthermore, as for conventional decorative films for glass windows, PVC (PVC) -based films are the mainstream from Document 1, and non-PVC is desired due to environmental impact at the time of disposal.

  Thus, there is a demand for a non-PVC film that has excellent visual reproducibility for photographs, etc., has glass adhesive strength suitable for large glass windows, has no adhesive residue when re-attaching, etc., and has low environmental impact. .

Japanese Unexamined Patent Publication No. 1990-043045 Japanese Patent No. 2664026 Japanese Patent No. 2675597

2008 Present state and future prospects of plastic films and sheets (Fuji Chimera Research Institute)

The present invention has high transparency, high surface tension on the surface, excellent visual reproducibility for photographs, etc., and has a glass adhesive strength suitable for large glass windows, high elasticity, and firmness in the film. The purpose is to provide a non-PVC film that is excellent in workability, has no adhesive residue when it is reattached, has low chargeability, has little dust as a glass window decoration film, has excellent printability, and has low environmental impact And

The present invention relates to a glass window decorative film.
In particular,
[1] Tensile modulus is 3 to 50 MPa and MFR at 230 ° C. is 1 to 100 g / 10 min. And an adhesive layer having an adhesive strength (JIS Z0237) of 0.3 to 50 N / 25 mm when adhered to the surface of the glass plate and left for 60 minutes and then peeled off from the surface of the glass plate, and a tensile modulus of 100 to 100 1500 MPa, the difference in MFR at 230 ° C. from the adhesive layer is 5 g / 10 min. A film for printing glass comprising: a base material layer, wherein the surface of the base material layer is surface-treated, the surface tension is 32 mN / m or more, and the haze is 0 to 10%.
[2] The film for printing glass according to [1], wherein the adhesive layer and / or the base material layer is made of an olefin resin.
[3] The film for printing glass according to [1], wherein the adhesive layer or / and the base material layer has a surface resistance value of 1 × 10 ¹⁷ to 1 × 10 ⁵ Ω.
[4] The film for glass for printing according to [1], which has a tensile modulus of 80 to 1000 MPa and a thickness of 30 to 150 μm.
[5] The film for printing glass according to [1], further including a release layer on the outermost surface and having at least one adhesive layer in contact with the release layer.
[6] The film for glass for printing as described in [5], wherein the release layer is colored.
[7] MFR at 230 ° C. is 1 to 100 g / 10 min. The difference in MFR at 230 ° C. between the resin A having a haze of 0 to 10% and the resin A was 5 g / 10 min. The manufacturing method of the film for glass for printing which includes the process of coextruding resin B whose haze is 0 to 10% below, and does not include a extending | stretching process substantially after the said coextrusion process.

  According to the present invention, high transparency, high surface tension of the surface, excellent visual reproducibility of photographs, etc., glass adhesive strength suitable for large glass windows, high elastic modulus and firmness in the glass To provide a non-PVC film that has excellent pasting workability, has no adhesive residue during re-sticking, etc., has low chargeability, has less dust as a glass window decoration film, has excellent printability, and has low environmental impact It becomes possible to solve the demands for glass window decoration films in department stores, supermarkets and apparel shops.

    Hereinafter, the film for glass for printing of the present invention (hereinafter referred to as a film) will be described in detail.

  Moreover, in the following description, “˜” is used to define a numerical range, but “˜” in the present invention includes a boundary value. For example, “10 to 100” is 10 or more and 100 or less.

1. Film for glass for printing The film of the present invention comprises an adhesive layer and a base material layer, the surface of the base material layer is treated, the surface tension is 32 mN / m or more, and the haze is 10% or less. Further, as will be described later, a release film can be further combined as necessary.

  The surface of the base material layer of the film of the present invention is surface-treated, and the surface tension needs to be 32 mN / m or more and 60 mN / m or less, more preferably 35 mN / m or more and 50 mN / m or less, more preferably 37 mN / m to 45 mN / m is most preferable. When the surface tension is smaller than the above range, after printing the ink with a printer, the adhesive strength of the printed ink to the base material layer is low, and when the printed film is subjected to bending stress or the like, the printed ink is There is a risk of peeling. Further, it is not preferable to perform the surface treatment so that the surface tension is larger than the above range because the film is deteriorated and the mechanical strength is lowered.

  Specific examples of the surface treatment in the present invention include plasma treatment, oxygen plasma treatment, RIE (oxygen plasma etching) treatment, corona discharge treatment, excimer treatment, UV treatment, permanganate desmear treatment, coupling agent treatment, and the like. It is done.

  The smaller the haze of the film of the present invention, the better the transparency, and the harmony of the color with the glass is born and the beauty is not impaired. Specifically, if it is 3% or less, the uncomfortable feeling between the film and the glass is low, and if it is 2% or less, the uncomfortable feeling is eliminated. Here, the haze is measured according to JIS K7136 using a turbidimeter (cloudiness meter) NDH2000 (manufactured by Nippon Denshoku).

  The surface roughness (Ra) of the film of the present invention is preferably as small as possible so as not to inhibit light transmission, and specifically, it is preferably 5 μm or less.

  It is preferable that the tensile elasticity modulus of the adhesion layer contained in the film of this invention is 3-50 Mpa. This is because if the tensile modulus is smaller than the above range, the glass and the adhesive layer are adhered too closely to the glass, and the film is difficult to peel off when the film is peeled off from the glass. On the other hand, if the tensile elastic modulus is larger than the above range, the glass and the adhesive layer are hardly adhered.

  About the adhesion layer contained in the film of this invention, it is preferable that the adhesive force with glass (JIS Z0237) is the range of 0.3-50 N / 25mm. In general, when the adhesive strength between a glass for printing glass and glass is large, the film is preferably peeled off from the glass even in large-sized applications. On the other hand, if the adhesive strength with glass is greater than a certain level, it is difficult to remove the film from the glass, and the workability when work such as reattaching the film is poor. Therefore, the adhesive strength between the glass and the adhesive layer is preferably in the range of 0.5 to 10 N / 25 mm, more preferably 2 to 5 N / 25 mm.

  In order to impart high adhesive strength to a film for printing glass, a so-called adhesive such as an acrylic resin is generally used for the adhesive layer. However, when the adhesive as described above is used for a film for printing glass, there is a problem that the adhesive remains in the adhered glass and contamination occurs (residue). Therefore, in the present invention, haze was reduced by using, as an adhesive layer, a layered resin A (described later) by coextrusion without using the above-mentioned adhesive for the film. As a result, there is almost no residue when peeling from the glass, such as reattachment, transparency is improved, there is no sense of discomfort with the glass, and a film with high aesthetics and workability without using an adhesive is realized. I was able to.

  In addition, the adhesive force (JIS Z0237) in this invention means the adhesive force when it peels from the surface of the said glass plate after sticking on the surface of a glass plate and leaving it to stand for 60 minutes.

  As the resin A constituting the adhesive layer, when a polychlorinated resin is used, it is preferable to refrain from using it because a harmful substance such as dioxin may be generated if it is subjected to a combustion treatment when discarded. Olefin-based elastomers, styrene-based elastomers, urethane-based elastomers, polyester-based elastomers, nitrile-based elastomers, polyamide-based elastomers, and lamellar-based elastomers that are more expensive than polychlorinated resins but do not contain halogens such as chlorine are preferable. Specifically, Notio (registered trademark, manufactured by Mitsui Chemicals, Inc.), Toughmer, Miralastomer (registered trademark, manufactured by Mitsui Chemicals, Inc.) (reference: No. 1194276), Dynalon (registered trademark, manufactured by JSR), etc. However, it is not limited to these.

  The thickness of the adhesive layer is preferably 50% or less of the total film thickness of the present invention. As will be described later, from the viewpoint of reducing haze, the adhesive layer is preferably as thin as possible.On the other hand, when the film is thinned, in large applications, the shape retention of the film deteriorates, tends to be bent, and is attached to glass. During work, wrinkles are likely to occur, and workability deteriorates, which is not preferable.

  The tensile modulus of the base material layer is preferably 100 MPa to 1500 MPa. If the tensile elastic modulus is smaller than the above range, as described above, the film shape retainability deteriorates and tends to be bent in large-sized applications, and wrinkles are likely to occur during affixing to glass, resulting in poor workability. It is not preferable. On the other hand, if the tensile modulus is larger than the above range, the film becomes brittle and may be damaged. For the above reasons, the elastic modulus of the entire film is preferably 80 MPa to 1000 MPa, more preferably 100 MPa to 700 MPa.

  The resin B constituting the base material layer is not particularly limited as long as it is below the above-mentioned haze and the tensile elastic modulus is in the above-mentioned range, but is preferably polyester-based such as PET, nylon-based, polycarbonate, elastomer And polyolefin type are applied. However, when polyester, such as PET, nylon, and polycarbonate are used as the resin B of the base material layer, the base material layer may be folded and wrinkled during operations such as printing, pasting, and reattaching, and the appearance may be impaired. Elastomer and polyolefin resins are preferred.

  Some elastomers and polyolefins have a relatively high haze. For example, by reducing the film thickness to 80 μm or less to improve the transmittance, the haze can be used.

  The thickness of the base material layer is 5 μm to 100 μm, and is preferably 50% or more of the total thickness of the film of the present invention. This is better from the viewpoint of reducing haze, which will be described later. On the other hand, if the film is thinned, as described above, the shape retention of the film is deteriorated in large applications, and it is easy to bend. Since wrinkles and the like are likely to occur during work and workability is deteriorated, the thickness of the entire film is preferably 30 to 150 μm, more preferably 50 to 40 μm, and most preferably 60 to 120 μm.

  The MFR of the resin constituting the adhesive layer and the base material layer is 1 to 100 g / 10 min. At 230 ° C. when measured according to ASTM D1238. It is preferable that Furthermore, the MFR difference between the adhesive layer and the base material layer is preferably 5 or less. This is because, as will be described later, the film of the present invention is produced by a coextrusion method in order to reduce contamination of the glass to be attached and to maintain the workability of the film. That is, if the MFR is smaller than the above range, extrusion becomes difficult. On the other hand, if the MFR is larger than the above range, the resin flows too much, making it difficult to make the shape of the adhesive layer uniform, and the adhesive force between the adhesive layer and the glass is reduced.

Furthermore, it is preferable that the surface resistance value of the adhesive layer or / and the base material layer contained in the film of the present invention is low, specifically 1 × 10 ¹⁷ to 1 × 10 ⁵ Ω is preferable, and 1 × 10 ¹² to 1 ×. More preferably, it is 10 ⁵ Ω. The surface resistance value here is measured in accordance with JIS K 6911 and ASTM D257. This is to prevent the film from being charged and particles such as dust from adhering to the appearance of the show window when the film of the present invention is bonded to glass. Furthermore, when printing is performed, if the film is charged, the ink or toner does not adhere to a predetermined position, thereby preventing problems such as poor print pattern reproducibility.

  The surface resistance value can be measured using, for example, R-9740 (manufactured by Advantest) based on JIS K6911.

  In order to impart antistatic performance to the film of the present invention, for example, as disclosed in Japanese Patent No. 4247756, a method of adding an ion conductive compound to the tape, a coating layer having conductivity, etc. Although it is not particularly limited, an ion conductive compound is added in advance to the resin used as the raw material for the adhesive layer or / and the base material layer, and, as described later, by a coextrusion method. The said performance can be provided by manufacturing the film of this invention.

  As the ion conductive compound, those commonly used can be used, and are not particularly limited, and specific examples include perestat HC250 and perestat 230 (manufactured by Sanyo Chemical Industries, Ltd.).

  The pressure-sensitive adhesive layer or the base material layer, or both the pressure-sensitive adhesive layer and the base material layer may be in the range of the surface resistance value. However, when an ion conductive compound is added, the surface resistance value is within the above range using the pressure-sensitive adhesive layer. It is preferable that This is because, when particles such as dust adhere to the adhesive layer while adhering to the adhesive layer, they remain sandwiched between the adhesive layer and the glass of the show window. This is because the film falls and causes the film to fall. Furthermore, as described above, when an ion conductive compound is added to impart antistatic performance, the alteration and crystallization of the resin are promoted, the haze of the film for printing glass is increased, and the transparency of the film is lowered. Because there is a fear.

  Moreover, when forming the layer which has electroconductivity on a film surface by coating etc., it is preferable to use for a base material layer and a surface resistance value is the said range. As a result, ink or toner adheres to a predetermined position, and the reproducibility of the printed pattern can be improved.

  A release film can be further bonded to the outermost adhesive layer of the film of the present invention.

  Generally, a film such as a film for printing glass is laminated in a roll shape or a sheet shape and transported and stored as a laminate, and the film is peeled off from the laminate for use. A phenomenon called blocking that prevents the film from being peeled off from the laminate may occur. In order to prevent this blocking, generally, the surface of the film to be laminated is processed to be uneven (embossed). However, as described above, the surface of the film of the present invention needs to be smooth so as not to disturb the transparency. Therefore, when transporting and storing the film of the present invention in the form of a laminate, it is preferable to attach a release film to the outermost adhesive layer that is easy to block because of the higher adhesive strength of the film.

  As the release film, a release film that is generally used can be used, and is not particularly limited, but preferably does not use an adhesive such as an acrylic pressure-sensitive adhesive so as not to impart a contaminant to the pressure-sensitive adhesive layer. . Specific examples include polyethylene terephthalate film (silicone-coated pet film (separator SP-PET, manufactured by Tosero Co., Ltd.)).

  Further, in order to facilitate the distinction between the printing surface and the release film surface and improve the printing workability, a colored release film or a release film on which a mark is described is preferable. Furthermore, a white release film is more preferable in order to confirm the color developability after printing.

  The film of the present invention and the release film can be bonded together by a generally used method, and are not particularly limited. However, it is preferable to bond the film of the present invention without stretching as much as possible. This is because when the film of the present invention is stretched, distortion, hazyness, etc. are generated in the film surface, and workability and aesthetics may be deteriorated. Specific examples of the bonding method include a method using a normal sheet laminating apparatus.

  The dicing film of the present invention is preferably produced by coextruding at least the resin A and the resin B and substantially not stretching after the coextrusion. This is because, if the film is stretched strongly, distortion and hazyness may occur in the film surface, which may reduce workability and aesthetics.

  As a co-extrusion method, a known method can be used and is not particularly limited. Specifically, using a multi-layer T die, the glass transition temperature (Tg) of the resin forming each layer is not lower than the melting point (Tm). A method of heating and melting to a flat die and feeding it to a flat die and bonding it in the die (feed block method), a melt of each layer is sent to another manifold in the flat die, and a common location in the die ( In general, before the die lip entrance, each layer is joined in layers and fed into a flat die and bonded inside the die (multiple manifold method). Can be mentioned.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example, this invention is not limited to this. The physical property test methods A to E used in the present invention will be described below.

A. Tensile modulus In accordance with the test method for plastic tensile properties described in JIS K7161, specimens in the machine direction and the transverse direction were prepared from tape, and a tensile test was performed in an environment of a temperature of 23 ° C. and a relative humidity of 50%. . From the stress-strain curve obtained from this tensile test, the tensile modulus was calculated from the tensile stress measured at two specified strains. The tensile elastic modulus (23 ° C.) shown in the examples described later is an average value measured at least 5 times, and the unit is MPa.

B. Adhesive strength In accordance with the adhesive sheet test method described in JIS Z0237, an adhesive strength test was performed in an environment at a temperature of 23 ° C. and a relative humidity of 50%. The pressure-sensitive adhesive sheet is attached to a glass plate while applying pressure with a rubber roll of about 2 kg and placed in a constant environment at a temperature of 23 ° C. and a relative humidity of 50% for 30 minutes. The adhesive strength was measured while peeling from the test plate at 300 mm / min. The adhesive strength (23 ° C.) shown in the examples described later is an average value measured at least twice, and the unit is N / 25 mm.

C. According to Hayes JIS K7136, it was measured with a turbidimeter (cloudiness meter) NDH2000 (manufactured by Nippon Denshoku). The values shown in the examples described later are average values measured at least twice.

D. Print surface (base material surface) surface tension Measured according to JIS-K6768 (wetting test method for polyethylene and polypropylene films). In other words, a Johnson swab (manufactured by Johnson & Johnson Co., Ltd.) was soaked in the reagent described in JIS-K6768 (4.2) so that the liquid droplet would not drip, and the swab was placed horizontally on the test piece, Moved and applied. At that time, the width of the applied liquid film was made as wide as possible so that the area was about 6 cm ² . This application was completed in about 0.5 seconds. The determination of the wetting index is performed 2 seconds after the reagent is applied. For example, if the liquid film is not torn and the state when applied for 2 seconds or more is maintained, the liquid film is wet. When keeping wet for 2 seconds or more, proceed to the same test with the reagent with the next highest surface tension, and conversely, if the liquid film is broken within 2 seconds or the whole contracts, Next, the same test is performed with a reagent having a low surface tension. This operation is repeated until the reagent closest to wetting the surface of the specimen accurately for 2 seconds can be selected, and the surface tension (mN / m) of the selected reagent is determined by the wettability ( Index).

E. Surface resistance value Measured according to JIS K6911 using R-9740 (manufactured by Advantest). The values shown in the examples described later are average values measured at least twice.

Example 1
The following materials were used as the material of each layer constituting the tape.
Antistatic agent (manufactured by Sanyo Chemical Industries, Pelestat HC250) to F327 (manufactured by Prime Polymer Co., Ltd., MFR 7.3 g / 10 min (according to ASTM D1238, measuring temperature 230 ° C.)) as a resin constituting the base material layer Resin added at 10% by weight was used. The tensile elastic modulus was 550 MPa. As a resin constituting the adhesive layer, NOTIO PN3560 (manufactured by Mitsui Chemicals, registered trademark, MFR 6 g / 10 min (according to ASTM D1238, measuring temperature 230 ° C.), tensile elastic modulus 12 MPa) was used.

  Next, the material of each layer was melted by an extruder equipped with a flurlite type screw. The molding conditions (melting temperature) were an adhesion layer of 230 ° C. and a substrate layer of 230 ° C., and these two layers of molten resin were laminated in a multilayer die (coextrusion temperature: 230 ° C.).

  The extruded pressure-sensitive adhesive sheet was cooled, and a separator (SP-PET, manufactured by Tosero Co., Ltd.) was provided on the pressure-sensitive adhesive layer surface. Then, the substrate layer surface was subjected to corona treatment, slit and wound.

  The pressure-sensitive adhesive sheet thus obtained had a base material layer thickness of 12 μm, a pressure-sensitive adhesive layer thickness of 68 μm, and a total thickness of 80 μm. A. Tensile modulus, B. Adhesive tear strength, C.I. Hayes, D.H. Print surface (base material surface) surface tension, E.I. The surface resistance value was tested according to the physical property test method described above, and the results are shown in Table 1.

  Next, digital offset printing was performed using Dainippon Screen's Truepress 344, which can automatically manage ink density and fountain solution. Ten sheets were printed, and printing defects such as ink adhering to other than the printing part due to film charging were confirmed. Further, the printed film was cut into a square with a side length of 150 mm, and then applied to a square glass plate with a side length of 300 mm while applying pressure with a rubber roll of about 2 kg to improve workability (wrinkle Evaluation was made. Next, the film is divided into area units of 15 mm width and 150 mm length, and it is confirmed whether particle dust exists between the glass and the adhesive layer, and measurement is performed at 10 locations in an area unit of 15 mm width and 150 mm length. did. Thereafter, the film was allowed to stand for 24 hours in an environment of a temperature of 23 ° C. and a relative humidity of 50%, and then the film was peeled off from the glass. Furthermore, the film was again attached to the glass by the above method, and peeling was performed three times to confirm whether the printing ink on the surface of the base material layer was peeled off.

(Examples 2 to 7)
An adhesive sheet was prepared and evaluated in the same manner as in Example 1 except that the addition amount of the antistatic agent, the layer to which the antistatic agent was added, the thickness of the base material layer and the adhesive layer were changed as shown in Table 1. It was. Table 1 shows the tape configurations, physical properties, and evaluation results of Examples 2 to 7.

(Example 8)
After the pressure-sensitive adhesive sheet was prepared in the same manner as in Example 1 except that the addition amount of the antistatic agent, the layer to which the antistatic agent was added, the thickness of the base material layer and the pressure-sensitive adhesive layer were changed as shown in Table 1, 60 ° C. For 24 hours, and the printing ink peeling evaluation was performed with the surface tension set to 37 mN / m. Table 1 shows the tape configuration, physical properties, and evaluation results of Example 8.

(Comparative Examples 1-2)
The same as in Example 1 except that the addition amount of the antistatic agent, the layer to which the antistatic agent is added, the thickness of the base material layer and the adhesive layer are changed as shown in Table 1, and the surface of the base material layer is not treated. An adhesive sheet was prepared and evaluated. Table 1 shows the tape configurations, physical properties, and evaluation results of Comparative Examples 1 and 2.

(Comparative Example 3)
The resin constituting the base layer is changed to polyethylene terephthalate resin (PET film, 50 μm), the resin constituting the adhesive layer is changed to an acrylic adhesive, and the antistatic agent is not added to the base layer and the adhesive layer. The thicknesses of the base material layer and the adhesive layer were changed as shown in Table 1, and evaluation was performed in the same manner as in Example 1. Table 1 shows the structure, physical properties, and evaluation results of the pressure-sensitive adhesive sheet of Comparative Example 3.
The pressure-sensitive adhesive sheet preparation method of Comparative Example 3 will be described in detail below.

<Preparation of pressure-sensitive adhesive coating solution constituting pressure-sensitive adhesive layer>
150 parts by weight of deionized water in a polymerization reactor, 0.5 part by weight of 4,4′-azobis-4-cyanovaleric acid [manufactured by Otsuka Chemical Co., Ltd., trade name: ACVA] as a polymerization initiator, acrylic acid 52.25 parts by weight of butyl, 25 parts by weight of methyl methacrylate, 15 parts by weight of methacrylic acid-2-hydroxyethyl, 6 parts by weight of methacrylic acid, 1 part by weight of acrylamide, polyoxyethylene nonylphenyl ether (of ethylene oxide) as a water-soluble comonomer An average value of the added mole number; about 20) In which a polymerizable 1-propenyl group is introduced into a benzene ring of an ammonium salt of a sulfate ester [Daiichi Kogyo Seiyaku Co., Ltd .: trade name: Aqualon HS-20] 0 .75 parts by weight was added, and emulsion polymerization was carried out at 70 ° C. for 9 hours with stirring to obtain an acrylic resin water emulsion. This was neutralized with 14 wt% aqueous ammonia to obtain an adhesive polymer emulsion (adhesive main ingredient) containing 40 wt% solid content. 100 parts by weight of the resulting pressure-sensitive adhesive main agent emulsion (pressure-sensitive adhesive polymer concentration: 40% by weight) was collected, and further adjusted to pH 9.3 by adding 14% by weight aqueous ammonia. Then, 0.8 parts by weight of an aziridine-based crosslinking agent [manufactured by Nippon Shokubai Chemical Industry Co., Ltd., trade name: Chemitite PZ-33] and 5 parts by weight of diethylene glycol monobutyl ether are added to form an adhesive layer. A liquid was obtained.

<Preparation of adhesive film>
The pressure-sensitive adhesive coating solution was applied to a polypropylene film (release film, thickness: 50 μm) using a roll coater and dried at 120 ° C. for 2 minutes to provide a pressure-sensitive adhesive layer having a thickness of 20 μm. The said base film (PET film, 50 micrometers) was bonded and pressed to this, and the adhesive layer was transcribe | transferred. After the transfer, the adhesive sheet of Comparative Example 3 was manufactured by heating at 60 ° C. for 48 hours and then cooling to room temperature.

  According to the present invention, the decorative film for glass windows has high transparency, high surface tension on the surface, excellent visual reproducibility of photographs and the like, has glass adhesive strength suitable for large glass windows, and has an elastic modulus. Non-PVC with high film stiffness, excellent glass workability, no adhesive residue when reattaching, low chargeability, little dust as glass window decoration film, excellent printability, and low environmental impact A system film can be provided.

Claims (7)

Tensile modulus is 3 to 50 MPa and MFR at 230 ° C. is 1 to 100 g / 10 min. An adhesive layer having an adhesive strength (JIS Z0237) of 0.3 to 50 N / 25 mm when adhered to the surface of the glass plate and left for 60 minutes and then peeled off from the surface of the glass plate, and a tensile modulus of 100 to 100 1500 MPa, the difference in MFR at 230 ° C. from the adhesive layer is 5 g / 10 min. A film for printing glass comprising: a base material layer, wherein the surface of the base material layer is surface-treated, the surface tension is 32 mN / m or more, and the haze is 0 to 10%. The film for glass for printing of Claim 1 in which the said adhesion layer or / and the said base material layer consist of olefin resin. The film for glass for printing of Claim 1 whose surface resistance value of the said adhesion layer or / and the said base material layer is 1 * 10 < ¹⁷ > -1 * 10 < ⁵ > (omega | ohm). The film for glass for printing of Claim 1 whose tensile elasticity modulus is 80-1000 MPa and whose thickness is 30-150 micrometers. The film for glass for printing of Claim 1 which has a release layer in the outermost surface and has at least 1 layer of the said adhesion layer which is contacting the said release layer. The film for printing glass according to claim 5, wherein the release layer is colored. MFR at 230 ° C. is 1 to 100 g / 10 min. The difference in MFR at 230 ° C. between the resin A having a haze of 0 to 10% and the resin A was 5 g / 10 min. The manufacturing method of the film for glass for printing which includes the process of coextruding resin B whose haze is 0 to 10% below, and does not contain a extending | stretching process substantially after the said coextrusion process.