JP2003330120A - Screen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screen exhibiting a function of video image visual confirmation by using not only reflection light but also transmission light. <P>SOLUTION: The screen has a film layer (A) containing a thermoplastic resin having 30 to 80% total light transmittance and 20 to 70% total light reflectance. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen. More specifically, the present invention relates to a screen that exhibits a function of visually recognizing an image with both reflected light and transmitted light.

[0002]

2. Description of the Related Art As a technique for presentations and advertisements, it is common practice to project an image on a screen by a projection device such as a slide projector, an overhead projector, a liquid crystal projector or the like. At this time, the image on the screen is generally viewed as reflected light from the projected surface, and the range in which the image can be viewed is limited to one surface.

On the other hand, as a device utilizing transmitted light, for example, a hologram display device has been proposed in Patent Document 1. However, in the case of the hologram display device, it is necessary to control the projection angle within a specific range and the viewing angle is limited. Further, there is a problem that the device is expensive.

[Patent Document 1] Japanese Patent Laid-Open No. 2000-155374

[0004]

SUMMARY OF THE INVENTION The present invention, when projecting an image on a screen from a projection device such as a slide projector, an overhead projector, a liquid crystal projector, etc., can be performed not only from the image projection surface side but also from the back side of the screen. It is an object of the present invention to provide a semi-transparent screen that clearly shows, that is, a function of visually recognizing a reflected light or a transmitted light.

[0005]

DISCLOSURE OF THE INVENTION The inventors of the present invention have found a film processed product having specific optical characteristics and structure as a screen exhibiting a function of visually recognizing an image in both reflected light and transmitted light. That is, the present invention has a total light transmittance of 30 to
There is provided a screen having a film layer (A) containing a thermoplastic resin having a total light reflectance of 80% and 20% to 80%. The opacity of the film layer (A) is preferably 10 to 75%, and the glossiness of the film layer (A) is preferably 60% or less. The thickness of the film layer (A) is preferably 20 to 500 μm, and the porosity of the film layer (A) is 0.1 to 25%.
Is preferred. The film layer (A) preferably has a multi-layer structure, more preferably a multi-layer structure including at least a uniaxially stretched layer. A coat layer is preferably provided on at least one surface of the film layer (A). Further, it is preferable that a film layer (B) containing a thermoplastic resin and having a total light transmittance of 88% or more is provided on one surface of the film layer (A). The thickness of the film layer (B) is preferably 10 to 1000 μm. At least one surface of the film layer (A) or the film layer (B) is preferably provided with a pressure-sensitive adhesive layer or a re-peelable layer that can be repeatedly attached and peeled. The removable layer is preferably an adsorption layer, a weak adhesive layer, or an electrostatic adsorption layer, and a peelable removable material is preferably laminated on the surface of the adhesive layer or the removable layer. It is preferable that printing is performed on the film layer (A) and / or the film layer (B) and / or the coat layer. The thermoplastic resin used in the present invention preferably contains a polyolefin resin or a polyester resin, and the main thermoplastic resin of the film layer (A) is preferably a polyolefin resin, particularly a polypropylene resin. Is preferred.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The screen of the present invention will be described in detail below. In addition, in the present specification, "to" means
The numerical values described before and after that mean the lower limit and the upper limit, and these lower limit and the upper limit are also included in the range. The screen of the present invention can take various forms depending on the place and purpose of construction and the construction method. In the following description, for the sake of convenience, a tapestry screen (having a shape like a drape, which can be used for image projection in the state of being hung on a wall or a wall) and a screen for a show window (an adhesive layer on at least one side) Or a shape provided with a removable layer, which can be directly attached to a glass surface or the like and used for image projection), but these forms can be appropriately changed without departing from the gist of the present invention. It is a thing.

The film layer (A) constituting the screen of the present invention has a total light transmittance of 30 to 80%, preferably 3
It is 5 to 80%, more preferably 40 to 80%, and the total light reflectance is 20 to 70%, preferably 20 to 65%, more preferably 20 to 60%. Total light transmittance of 30
% Or the total light reflectance is higher than 70%,
When viewed from the back of the screen, the image is dark and difficult to see.
When the total light transmittance is higher than 80% or the total light reflectance is less than 20%, the image from the screen image projection surface side is dark and difficult to see. The total light transmittance and the total light reflectance referred to in this specification are JIS-Z872.
According to the method described in 2, wavelength 400nm ~ 700nm
It means the average value of the transmittance and the reflectance of each wavelength measured in the range.

The opacity of the film layer (A) is 10 to 7
It is preferably 5%, more preferably 20 to 70%, particularly preferably 30 to 70%. If the opacity is less than 10%, the image from the image projection surface side tends to be difficult to see, and if it is higher than 75%, the image from the rear side tends to be difficult to see. The opacity referred to in the present specification is based on the method described in JIS-P8138, and is a value obtained by dividing a value measured by applying a black plate to the back surface of the sample and a value measured by applying a white plate to the back surface of the sample. It is expressed as a percentage.

The glossiness of the film layer (A) is preferably 60% or less, more preferably 50% or less. When the glossiness is higher than 60%, the screen surface tends to cause halation, and the image tends to be difficult to see. The glossiness as used herein is measured by the method described in JIS-P8142.

The thickness of the film layer (A) is 20 to 500.
The thickness is preferably μm, more preferably 30 to 350 μm. If the thickness is less than 20 μm, the mechanical strength of the screen itself becomes weak, and it tends to be difficult to form a large screen. If the thickness is more than 500 μm, the image seen from the back side of the screen tends to be unclear. The thickness of the entire screen of the present invention is preferably 20 to 2000 μm, more preferably 30 to 1000 μm, for the same reason as above.
Particularly preferably, it is 50 to 800 μm. The thickness referred to in this specification is measured by the method described in JIS-P8118.

The film layer (A) may have pores formed therein in order to impart the above optical properties. In that case, the porosity is preferably 0.1 to 25%, more preferably 1 to 20%, and 3
It is particularly preferably about 15%. Porosity 0.1%
If it is less than 25%, the image from the screen image projection surface side tends to be dark and difficult to see, and if it is more than 25%, the image seen from the screen rear side tends to be unclear. The porosity in the present specification means that the cross section of the film layer is cut out and observed with an electron microscope, and the area ratio of the pores in that region is measured and displayed as a percentage.

Film Layer (A) The film layer (A) constituting the screen of the present invention contains a thermoplastic resin. The typical film layer (A) can be produced by blending a thermoplastic resin with an inorganic fine powder and / or an organic filler to form a film.
As the thermoplastic resin, polyethylene resin such as low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene resin,
Polyolefin resins such as polymethyl-1-pentene and ethylene-cyclic olefin copolymers, polyamide resins such as nylon 6, nylon 6,6 and nylon 6,10, polyethylene terephthalate and its copolymers, polyethylene naphthalate, aliphatic Examples thereof include polyester resins such as polyester, polycarbonate, atactic polystyrene, syndiotactic polystyrene, and polyphenylene sulfide. These may be used as a mixture of two or more. Among these, it is preferable to use a polyolefin resin or a polyester resin, and among the polyolefin resins, a polypropylene resin is particularly preferable.

The polypropylene resin includes propylene homopolymer, propylene and ethylene, 1-butene,
A copolymer with an α-olefin such as 1-hexene, 1-heptene or 4-methyl-1-pentene can be used. The stereoregularity is not particularly limited, and those exhibiting isotactic or syndiotactic and various degrees of stereoregularity can be used. The copolymer may be a binary system, a ternary system or a quaternary system, and may be a random copolymer or a block copolymer. The main thermoplastic resin of the film layer (A) (resin most used quantitatively) is
A polyolefin resin is preferable, and a polypropylene resin is more preferable.

As the inorganic fine powder, calcium carbonate,
Calcined clay, silica, diatomaceous earth, talc, mica, synthetic mica, sericite, kaolinite, titanium oxide, barium sulfate, alumina and the like can be used. Among these, calcium carbonate and barium sulfate are preferable.

As the organic filler, it is preferable to select a resin of a type different from the thermoplastic resin which is the main component of the film layer. For example, when a polyolefin resin is used as the thermoplastic resin film, as the organic filler, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, nylon 6, nylon 6,6, a homopolymer of a cyclic olefin, a cyclic olefin and ethylene, and the like are used. Copolymer (cyclic olefin copolymer (COC)), etc., having a melting point of 120 to 3
It is preferable to select one having a glass transition temperature of 00 ° C. or 120 to 280 ° C. When a polyester resin is used as the thermoplastic resin film, the organic filler is polypropylene, polystyrene,
Polycarbonate, nylon 6, nylon 6,6, polymethyl-1-pentene, homopolymer of cyclic olefin and copolymer (COC) of cyclic olefin and ethylene
It is preferable to select a resin having a melting point of 120 to 300 ° C or a glass transition temperature of 120 to 280 ° C.

In the film layer (A), one kind selected from the above-mentioned inorganic fine powder or organic filler may be used alone, or two or more kinds may be used in combination. When two or more kinds are combined, the inorganic fine powder and the organic filler may be mixed and used.

The content of the inorganic fine powder and / or the organic filler in the film layer (A) is preferably 1 to 50% by weight, more preferably 3 to 45% by weight, and 5 to 25% by weight. Is particularly preferable. 1
If it is less than 50% by weight or more than 50% by weight, the total light transmittance, total light reflectance and opacity tend to be unbalanced.

If necessary, the film layer (A) may further contain an antioxidant, a light stabilizer, a dispersant, a lubricant and the like. As the antioxidant, 0.001 to 1% by weight of a sterically hindered phenol type, phosphorus type, amine type, etc., and as a light stabilizer, a sterically hindered amine type, benzotriazole type, benzophenone type, etc. 0.001 to 1% by weight, and as a dispersant for the inorganic fine powder, a silane coupling agent, a higher fatty acid such as oleic acid or stearic acid, a metal soap, polyacrylic acid, polymethacrylic acid, or a salt thereof may be used. You may mix | blend 01-4 weight%.

As a molding method of the compound containing the thermoplastic resin, the inorganic fine powder and / or the organic filler, a general method can be used. For example, a cast molding method in which a molten resin is extruded into a film shape by using a single-layer or multi-layer T die or I die connected to an extruder, and this cast film is longitudinally stretched by utilizing the peripheral speed difference of rolls. Examples include a uniaxially stretched film forming method, a biaxially stretched film forming method in which the uniaxially stretched film is further horizontally stretched using a tenter oven, and a simultaneous biaxially stretched film forming method using a combination of a tenter oven and a linear motor.

The stretching temperature in the case of stretching is 2 to 60 ° C. lower than the melting point of the thermoplastic resin used, and when the resin is a propylene homopolymer (melting point 155 to 167 ° C.), it is 152 to 164 ° C. and high density. Polyethylene (melting point 121-
When the temperature is 134 ° C., 110 to 120 ° C. is preferable. The stretching speed is preferably 20 to 350 m / min.

The film layer (A) may have a single layer structure or a multilayer structure. In the case of a multilayer structure, a two-layer structure, three
It may have a structure of more than one layer. In the case of a single layer structure,
The film may be unstretched, uniaxially stretched or biaxially stretched. In the case of a two-layer structure, unstretched / unstretched,
Any structure of unstretched / uniaxially stretched, unstretched / biaxially stretched, uniaxially stretched / uniaxially stretched, uniaxially stretched / biaxially stretched, biaxially stretched / biaxially stretched may be used. In the case of a structure having three or more layers, the single layer structure and the two layer structure may be combined,
Any combination will do. The lamination can be performed by a known method such as coextrusion or lamination.

On the surface of the film layer (A), an offset printing machine, a gravure printing machine, a flexographic printing machine, a screen printing machine, if necessary, on at least one surface, as long as it does not cause optical inconvenience to the projected image. A coat layer suitable for printing by a letterpress printing machine, a laser printer, a thermal transfer printer, an inkjet printer or the like may be provided. By using such a film, it is possible to obtain a screen on which background information or images are printed in advance.

If desired, a pressure-sensitive adhesive layer may be provided on the back surface of the film layer (A). Representative examples of the pressure-sensitive adhesive include a rubber-based pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive, and a silicone-based pressure-sensitive adhesive. As the rubber-based pressure-sensitive adhesive, polyisobutylene rubber, butyl rubber and mixtures thereof, or these rubber-based pressure-sensitive adhesives are compounded with a tackifier such as abietic acid rosin ester, terpene-phenol copolymer, terpene-indene copolymer and the like. There are things. Examples of the acrylic pressure-sensitive adhesive include 2-ethylhexyl acrylate / n-butyl acrylate copolymer, 2-ethylhexyl acrylate / ethyl acrylate / methyl methacrylate copolymer having a glass transition temperature of -20 ° C or lower. To be These pressure-sensitive adhesives are preferably colorless and transparent, and as the form, solvent type, emulsion type, hot melt type and the like can be used. Generally, solvent type and emulsion type are applied by a known coating method. By doing so, they can be laminated.

When the screen of the present invention is provided with an adhesive layer, it can be used by adhering to an adherend such as a show window or a window glass, but the adhesive layer can be repeatedly adhered / peeled off. When it is replaced with, it can be easily peeled off from the adherend after use without leaving an adhesive residue, and the screen can be repeatedly used. In addition, it is easy to adjust the position when applying before use, and to reattach when it fails, and the screen can be used beautifully with less air entrainment, further improving the commercial advantage. The re-peeling layer enables repeated sticking / peeling to / from an adherend, and for example, rubber, vinyl chloride, acrylic resin, urethane resin,
The adsorption layer that can be formed by foaming a silicone resin, an elastomer or the like can be exemplified. The adsorption layer has a function of adsorbing due to the surface formed by foaming and the fine pores (recesses) inside.

In addition to the adsorption layer, the re-peelable layer may be prepared by, for example, blending the above-mentioned adhesive with a particle component capable of forming surface protrusions (spacers), or a method such as an embossing method, a screen printing method or a gravure printing method. Thus, a weak adhesive layer in which a protrusion structure having a fine dot-like, linear, lattice-like, mesh-like, or other continuous pattern or a paste is formed on the surface of the adhesive can be exemplified.
The weak adhesive layer is a layer in which the adhesive force of the adhesive is adjusted to be low by a protrusion structure (projection) formed on the surface or by sizing. In addition to the adsorption layer and the weak adhesion layer, the re-peelable layer may be, for example, an electrostatic adsorption layer composed of a composition and a structure containing a dielectric material as a main component and easily charged and hardly attenuated. These removable layers are adjusted so as not to deviate from the gist of the present invention.

Film Layer (B) The screen of the present invention may be provided with a film layer (B) containing a thermoplastic resin, if necessary, in order to supplement its mechanical strength in response to an increase in size and the like. it can. The total light transmittance of the film layer (B) constituting the screen of the present invention is preferably 88% or more, more preferably 90% or more. If the total light transmittance is less than 88%, the image tends to be dark and difficult to see when viewed from the back side of the screen.

The thickness of the film layer (B) constituting the screen of the present invention is preferably 10 to 1000 μm, more preferably 20 to 800 μm, and 3
It is particularly preferable that the thickness is 0 to 500 μm. Thickness is 10
If the thickness is less than μm, the mechanical strength is insufficient and the function of the film layer (B) tends to be unachievable. 1000 μm
If it is thicker, the weight of the entire screen tends to be too large, and it tends to be difficult to handle. Also, the image seen from the back side of the screen tends to be unclear.

The film layer (B) constituting the screen of the present invention is molded by the same thermoplastic resin, inorganic fine powder, organic filler, additive and molding method as those used for molding the film layer (A). Can be done using. As the thermoplastic resin used in the film layer (B), it is preferable to use a polyolefin resin or a polyester resin, and among them, a polyester resin is particularly preferable. The film layer (B) may have a single-layer structure or a multi-layer structure. In the case of a multi-layer structure, it may have a two-layer structure, a three-layer structure or more.

For the lamination of the film layer (A) and the film layer (B), general dry lamination, wet lamination, extrusion (sand) lamination, thermal lamination, and the same adhesive as the above-mentioned adhesive layer are provided. It can be performed by a method of pressure-sensitive adhesion as an adhesive layer. In the case of pressure-sensitive adhesion, it is preferable that the adhesive layer is formed on the laminated surface side of the film layer (B) and the film layer (A). The adhesive is preferably transparent, more preferably colorless and transparent.

The screen of the present invention can be produced, for example, by laminating the film layer (A) and the film layer (B), and optionally providing a pressure-sensitive adhesive layer or a removable layer on one side. it can. This pressure-sensitive adhesive layer or re-peelable layer can be formed by the same method using the same components as described above. The pressure-sensitive adhesive layer or the removable layer may be formed before laminating the film layer (A) and the film layer (B).

On the surface of the above-mentioned pressure-sensitive adhesive layer or re-peelable layer, a peelable peelable material is preferably laminated. The peeled product is for protecting the pressure-sensitive adhesive layer or the removable layer when not in use, and the peeled product is peeled off before use. In order to improve the releasability of the peeled product from the pressure-sensitive adhesive layer or the re-peeling layer, the surface which contacts the pressure-sensitive adhesive layer or the re-peeling layer is generally treated with silicone. As the peeling material, general ones that are usually used can be used, such as high quality paper or kraft paper as it is, calendered or resin coated or film laminated, glassine paper, coated paper, plastic film, etc. A processed product can be used.

[0032]

EXAMPLES The present invention will be described more specifically with reference to production examples, examples, comparative examples, and test examples. Materials, usage amounts, ratios, processing contents, processing procedures, embodiments and the like shown in the following examples can be appropriately changed without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be limitedly interpreted by the following specific examples. The raw materials used in the production examples are shown in Table 1.

[0033]

[Table 1]

[Production of Film Layer Containing Thermoplastic Resin] (Production Example 1) 87% by weight of propylene homopolymer (PP2), 10% by weight of high-density polyethylene (HDPE), and 3% by weight of calcium carbonate are extruders. After melt-kneading at 250 ° C., the mixture was supplied to a die set at 250 ° C., extruded into a film, and cooled with a cooling roll to obtain an unstretched film. This unstretched film was heated to 135 ° C. and stretched in the machine direction at a magnification of 4 times to obtain a uniaxially stretched film. This film was used as the base material layer (b). Propylene homopolymer (P
P1) a mixture of 52% by weight, 3% by weight HDPE and 45% by weight calcium carbonate in a separate extruder.
After melt-kneading at 0 ° C., the mixture was fed to a die set at 250 ° C. and extruded into a film to obtain a front surface layer (a) and a back surface layer (c).
Was laminated on both sides of the 4-fold stretched film and cooled to 60 ° C. to obtain a laminated film (a / b / c) having a three-layer structure. This laminated film was heated to 164 ° C. and stretched in a transverse direction at a magnification of 9 times with a tenter. Then 160 ° C
After annealing at 60 ° C., cool to 60 ° C. and slit the ears to a thickness of 92 μm (a / b / c = 22 μm / 4
A multilayer stretched resin film layer having a thickness of 8 μm / 22 μm) was obtained.

(Production Example 2) 87% by weight of PP2 and HDP
A mixture of 10% by weight of E and 3% by weight of calcium carbonate was used as the base layer (b), 52% by weight of PP1 and HDP were used.
A mixture consisting of 3% by weight of E and 45% by weight of calcium carbonate was melt-kneaded at 250 ° C. in different extruders as the front surface layer (a) and the rear surface layer (c), respectively, and then one unit set at 250 ° C. It was supplied to a co-extrusion die, and what was laminated in the die was extruded into a film shape, which was cooled with a cooling roll to obtain an unstretched film. This unstretched film
It was heated to 0 ° C. and stretched in the machine direction at a magnification of 4 times to obtain a uniaxially stretched film. Next, this stretched film was heated to 164 ° C. and stretched in the transverse direction with a tenter at a magnification of 9 times. Then, after annealing at 160 ° C., it is cooled to 60 ° C. and the ears are slit to a thickness of 60 μm (a / b / c
= 2 μm / 56 μm / 2 μm) to obtain a multilayer stretched resin film layer.

(Production Example 3) A thickness of 77 μm (a / a) was obtained by the same method as in Production Example 1 except that the resin extrusion amount was changed.
b / c = 18 μm / 41 μm / 18 μm) to obtain a multilayer stretched resin film layer. On the surface layer (a) side of this multilayer stretched resin film, an inkjet coating agent having the following composition was applied so that the thickness of the coating layer after drying was 40 μm, and dried to form a coating layer. . Fine particle silica (average particle size 0.3 μm) (solid content 18%) 76% by weight Polyvinyl alcohol (solid content 10%) 20% by weight Melamine formalin resin (solid content 30%) 2% by weight Cationic acrylic polymer (solid content 30 %) 2% by weight

(Production Example 4) A polyethylene film was laminated on both sides of a high-quality paper as a release product, and a silicone adhesive was applied to one side of the release paper. ,
25 g / m in solid content of Toyo Ink Chemical Co., Ltd.
After being coated so as to be ² , the pressure-sensitive adhesive layer was formed by drying. The pressure-sensitive adhesive layer on the release paper was laminated on the back surface layer (c) of the film obtained in Production Example 1 to obtain a processed product of the pressure-sensitive adhesive layer and a film layer having a peeled product.

(Production Example 5) PP2 87% by weight, HDP
10 wt% of E and 3 wt% of calcium carbonate were melt-kneaded at 250 ° C. by an extruder, supplied to a die set at 250 ° C., extruded into a film, and cooled by a cooling roll to obtain an unstretched film. This unstretched film at 135 ° C
It was heated to and stretched in the longitudinal direction at a magnification of 4 times to obtain a uniaxially stretched film. This film was used as the base material layer (b). PP1
Of 87% by weight, HDPE 10% by weight, and calcium carbonate 3% by weight in a separate extruder at 250 ° C.
After melt-kneading with, the mixture was fed into a die set at 250 ° C. and extruded in a film form, laminated on both sides of the above 4 × stretched film as a front surface layer (a) and a back surface layer (c), and cooled to 60 ° C. to form three layers. A laminated film (a / b / c) having a structure was obtained. This laminated film was heated to 164 ° C. and stretched in a transverse direction at a magnification of 9 times with a tenter. Then, after annealing at 160 ° C., it is cooled to 60 ° C. and the ears are slit to have a thickness of 68 μm (a / b / c = 17 μm / 33 μm).
/ 18 μm) to obtain a multilayer stretched resin film layer.

Production Example 6 81% by weight of PP1 and HDP
E3 wt% and calcium carbonate 16 wt% were melt-kneaded at 250 ° C. by an extruder, supplied to a die set at 250 ° C., extruded into a film, and cooled by a cooling roll to obtain an unstretched film. This unstretched film is 150 ° C
It was heated to and stretched in the longitudinal direction at a magnification of 5 times to obtain a uniaxially stretched film. This film was used as the base material layer (b). PP2
54 wt.% And calcium carbonate 46 wt.% Were melt-kneaded at 250 ° C. in separate extruders, and then 2
Supply to a die set to 50 ° C and extrude into a film,
As the front surface layer (a) and the back surface layer (c), the above 5 times stretched film was laminated on both sides and cooled to 60 ° C. to obtain a laminated film (a / b / c) having a three-layer structure. This laminated film is 1
It was heated to 55 ° C. and stretched in a transverse direction at a magnification of 7.5 times with a tenter. Then, after annealing at 165 ° C., it is cooled to 60 ° C. and the ears are slit to a thickness of 95 μm.
m (a / b / c = 19 μm / 57 μm / 19 μm) of a multilayer stretched resin film layer was obtained.

(Examples 1 and 2) The film layers of Production Examples 1 and 2 were directly used as screens. (Example 3) The film layer provided with the coat layer of Production Example 3 was directly used as a screen. (Example 4) The film layer provided with the pressure-sensitive adhesive layer of Production Example 4 was directly used as a screen. (Comparative Examples 1 and 2) The film layers of Production Examples 5 and 6 were directly used as screens.

Example 5 A transparent polyester film (trade name: DIAFOIL T600E, thickness 50 μm, total light transmittance 90%, Mitsubishi Chemical polyester film) on the back surface layer (c) side of the screen obtained in Example 1 Manufactured by
Hereinafter, a PET film) is laminated by a dry lamination method to form a screen.

Example 6 A pressure-sensitive adhesive layer and a peeled product were laminated on the PET film side of the screen obtained in Example 5 in the same manner as in Production Example 3 to obtain a screen.

Example 7 A PET film was laminated on the back surface layer (c) side of the film layer provided with the coating layer of Production Example 2 by a dry lamination method to obtain a laminate (I). On the PET film side of this laminate (I), a foamed emulsion obtained by treating an emulsion containing urethane resin and acrylic resin as a main component with a foaming machine so that the volume ratio of emulsion / air is 1/3 is obtained with clearance. After coating to 1 mm, it is dried and repeatedly applied.
A removable peelable layer was formed. A polyester film whose surface was treated with silicone to impart releasability was used as a peeled product, and the silicone-treated surface of the peeled product and the re-peelable layer were laminated to obtain a laminate (II). Furthermore, this laminate (I
On the coat layer side of (I), a large format IJ printer (trade name:
MC-9000, manufactured by Seiko Epson Corporation, was used to print a "frame" pattern on the peripheral portion of the screen, and this was used as a screen. The obtained screen had a high design quality when printed on a show window, and the image inside the "frame" could be viewed from inside and outside the room, which was very appealing. Further, it had excellent characteristics that it was easy to repeatedly attach and peel to the glass surface during construction, no air was entrapped during sticking, and no adhesive residue was observed during peeling.

Test Example 1 The porosity, total light transmittance, total light reflectance, opacity and gloss of the film layers obtained in the above Production Examples 1 to 6 were measured by the above-mentioned methods. In Production Example 3, only the porosity was measured on the film before the coating layer was provided. Other items were measured in the film layer including the coat layer. In Production Example 4, only the porosity was measured on the film before the adhesive layer and the peeled product were provided, and the other items were measured on the film layer including the adhesive layer and excluding the peeled product. The results are as shown in Table 2.

(Test Example 2) Each of the screens obtained in Examples 1, 2, 3, 5 and Comparative Examples 1, 2 was applied as a tapestry. Further, each screen having the pressure-sensitive adhesive layer or the re-peelable layer obtained in Examples 4, 6, and 7 was attached to a glass window to be used as a show window. An image was projected from the liquid crystal projector onto the film (A) surface side, which is the screen surface, and the sharpness of the image and the presence or absence of halation were evaluated according to the following criteria.・ Image sharpness ○ Clear × unclear (image shifts, blurs, and is hard to see) ・ Halation ○ None × Yes (hard to see due to specular reflection) The results are shown in Table 3.

[0046]

[Table 2]

[0047]

[Table 3]

[0048]

The screen of the present invention has image visibility on both sides, a clear image, and no halation. Therefore, the screen of the present invention can exhibit excellent functions as a screen for image projection, and has an extremely high industrial utility value.

Claims (18)

[Claims] 1. A screen comprising a film layer (A) containing a thermoplastic resin having a total light transmittance of 30 to 80% and a total light reflectance of 20 to 70%. 2. The opacity of the film layer (A) is 10 to 7.
The screen according to claim 1, which is 5%. 3. The screen according to claim 1, wherein the film layer (A) has a glossiness of 60% or less. 4. The thickness of the film layer (A) is 20 to 500.
μm, any one of claims 1 to 3 characterized in that
Screen described in section. 5. The porosity of the film layer (A) is 0.1 to 2.
It is 5%, Any one of Claims 1-4 characterized by the above-mentioned.
Screen described in section. 6. The screen according to claim 1, wherein the film layer (A) has a multi-layer structure. 7. The film layer (A) has a multi-layer structure including at least a uniaxially stretched layer.
The screen according to claim 6. 8. The screen according to claim 1, wherein a coating layer is provided on at least one side of the film layer (A). 9. A film layer (B) containing a thermoplastic resin and having a total light transmittance of 88% or more is provided on one side of the film layer (A). The screen according to any one of items. 10. The film layer (B) has a thickness of 10 to 10.
Screen according to claim 9, characterized in that it is 00 m. 11. The screen according to claim 1, wherein an adhesive layer is provided on at least one surface of the film layer (A) or on the film layer (B). 12. The re-peelable layer capable of being repeatedly attached and peeled off is provided on at least one surface of the film layer (A) or on the film layer (B), according to any one of claims 1 to 10. The screen according to item 1. 13. The screen according to claim 12, wherein the removable layer is an adsorption layer, a weak adhesion layer or an electrostatic adsorption layer. 14. The peelable product is laminated on the surface of the pressure-sensitive adhesive layer or the re-peeling layer.
The screen according to claim 1. 15. The screen according to claim 1, wherein printing is performed on the film layer (A) and / or the film layer (B) and / or the coat layer. 16. The screen according to claim 1, wherein the thermoplastic resin contains a polyolefin resin or a polyester resin. 17. The screen according to claim 1, wherein the main thermoplastic resin of the film layer (A) is a polyolefin resin. 18. The screen according to claim 17, wherein the polyolefin resin is a polypropylene resin.