JP2017056588A - Radio wave-transmitting infrared reflective laminate, closing member, and method for manufacturing radio wave-transmitting infrared reflective laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio wave-transmitting infrared reflective laminate that suppresses reduction in performances with time.SOLUTION: A laminate of the present invention has radio wave transmissivity and infrared reflectivity, and includes a substrate and a metal layer composed of a plurality of metal parts disposed on the substrate. The laminate has such characteristics that: the substrate is a stretched substrate; the metal part has a belt-like shape, in which a longitudinal direction of the metal part is coincident with the stretching direction of the substrate; and the plurality of metal parts are alternately arranged in a direction intersecting the longitudinal direction of the metal part.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a radio wave transmissive infrared reflective laminate that suppresses deterioration in performance over time.

  A laminate that reflects infrared rays but transmits radio waves is known. For example, Patent Document 1 discloses an automotive glass laminate including a transparent conductive film, the transparent conductive film having a pattern portion and a gap portion surrounding the pattern portion, and the gap portion has a specific refraction. An automotive glass laminate is disclosed that is filled with a filler having a rate. This technique aims to suppress “glaring” of the pattern of the transparent conductive film.

  Further, Patent Document 2 has at least a base material and two or more discontinuous metal layers having a plurality of discontinuously arranged metal films, and at least one of the discontinuous metal layers. Disclosed is a heat ray blocking base material in which a part of a discontinuously arranged metal film and a part of an opening not having the metal film cover the metal film of the other discontinuous metal layer. Has been. This technique aims to provide a substrate for heat ray shielding having high visible light permeability, high heat ray reflectivity (heat ray shielding property) from near infrared to mid infrared region, and high electromagnetic wave permeability. .

JP 2012-126578 A JP 2011-180562 A

  High durability is required for the radio wave transmitting infrared reflective laminate. On the other hand, when a stretched substrate is used as the substrate, the substrate shrinks in the stretching direction over time. When the base material contracts, the pattern of the metal part formed on the base material also changes, and the radio wave transmitting infrared reflective laminate may not be able to maintain the initial performance.

  The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a radio wave transmissive infrared reflective laminate that suppresses deterioration in performance over time. In the present invention, the radio wave transmissive infrared reflective laminate may be simply referred to as a “laminate”.

  In order to solve the above-mentioned problems, the present invention has a radio wave transmitting property and an infrared light reflecting property, and includes a base material, and a metal layer that is arranged on the base material and includes a plurality of metal parts. In the laminate, the base material is a stretched base material, the metal part has a strip shape, and the longitudinal direction of the metal part and the stretch direction of the base material coincide with each other. Provided is a laminated body in which a plurality of metal parts are respectively arranged in a direction intersecting with a longitudinal direction of the metal part.

  According to this invention, since the longitudinal direction of a metal part and the extending | stretching direction of a base material correspond, it can be set as the laminated body which suppressed the performance degradation with time.

  In the said invention, it is preferable that the width | variety of the said metal part and the width | variety between the said adjacent metal parts are in the range of 10 micrometers-5 mm, respectively.

  In the said invention, it is preferable that the said strip | belt shape is a linear form or a curvilinear form.

  In the above invention, the metal layer has a first metal layer and a second metal layer, and in the thickness direction, the base material, the first metal layer, and the second metal layer are arranged in this order, The first metal layer and the second metal layer respectively have a first metal part and a second metal part as the metal part, and the first metal part and the second metal part are in a plan view. It is preferable to have overlapping portions that overlap.

  Further, in the present invention, the closing member is disposed in the opening of the structure body, and includes the above-described laminate, and the longitudinal direction of the metal part is within a range of ± 45 ° with respect to the horizontal direction. A closure member is provided.

  According to the present invention, since the longitudinal direction of the metal part is within a predetermined angle range with respect to the horizontal direction, it is possible to provide a closing member that suppresses a decrease in the transmission of linearly polarized waves in the vertical direction.

  Further, in the present invention, a method for producing a laminate having a radio wave transmitting property and an infrared reflecting property, and having a base material, and a metal layer disposed on the base material and composed of a plurality of metal parts. And a preparation step of preparing a stretched substrate as the substrate, and a metal layer forming step of forming the metal layer on the stretched substrate, and the metal portion has a strip shape. The longitudinal direction of the metal part and the extending direction of the base material coincide with each other, and the plurality of metal parts are respectively arranged in directions intersecting the longitudinal direction of the metal part. A method for producing a laminate is provided.

  According to this invention, the laminated body which suppressed the performance degradation with time can be obtained by making the longitudinal direction of a metal part correspond with the extending | stretching direction of a base material.

  In this invention, there exists an effect that the electromagnetic wave transmission infrared reflection laminated body which suppressed the performance degradation with time can be provided.

It is a schematic sectional drawing which shows an example of the laminated body of this invention. It is a schematic plan view which shows an example of the laminated body of this invention. It is a schematic plan view explaining the performance degradation of a laminated body with time. It is a schematic sectional drawing which illustrates the laminated body of this invention. It is a schematic plan view explaining the metal part in this invention. It is a schematic plan view explaining the metal part in this invention. It is a schematic sectional drawing which illustrates the laminated body of this invention. It is a schematic sectional drawing which illustrates the laminated body of this invention. It is a schematic sectional drawing which illustrates the laminated body of this invention. It is a schematic perspective view explaining the closing member of this invention. It is a schematic diagram which shows an example of the closing member of this invention. It is a schematic diagram explaining the effect of this invention. It is a schematic sectional drawing which shows an example of the manufacturing method of the laminated body of this invention. It is a schematic sectional drawing which illustrates the manufacturing method of the laminated body of this invention.

  Hereinafter, the manufacturing method of the laminated body, closing member, and laminated body of this invention is demonstrated in detail.

A. Laminate FIG. 1 is a schematic cross-sectional view showing an example of a laminate of the present invention. As shown in FIG. 1, the laminate 10 of the present invention is a laminate that has both the property of reflecting infrared rays A and the property of transmitting radio waves B. Moreover, the laminated body 10 of this invention is a transparent laminated body normally. “Transparent” refers to the property of transmitting visible light. The visible light transmittance of the laminate 10 is, for example, 50% or more, preferably 70% or more, and more preferably 90% or more with respect to visible light having a wavelength of 380 nm to 780 nm. Moreover, the laminated body 10 has the base material 1 and the metal layer 200 which is arrange | positioned on the base material 1 and is comprised from the some metal part 2. FIG. In the present invention, “arranged on the substrate” means both the case where it is directly disposed on the substrate and the case where it is indirectly disposed on the substrate via another layer. Examples of the other layer include a dielectric layer described later.

FIG. 2 is a schematic plan view showing an example of the laminate of the present invention. 2 corresponds to FIG. 1. 1, the substrate 1 used in the laminate 10 shown in FIG. 2 is a drawing base material, the stretching direction of the base 1 and D _A. On the other hand, the metal part 2 has a belt-like shape, the longitudinal direction of the metal part 2 and D _B. In the present invention, the longitudinal direction D _B of the metal part 2, and the extending direction D _A of the substrate 1 coincides. Note that "match", the longitudinal direction D _B of the metal part 2, the angle between the extending direction D _A of the substrate 1, means that at most ± 15 °, the angle is, ± It may be 10 ° or less, or ± 5 ° or less. Further, a plurality of metal section 2 is arranged in a direction intersecting the longitudinal direction D _B of the metal part 2, to form a pattern. In FIG. 2, the plurality of metal portions 2 form a stripe pattern.

According to this invention, since the longitudinal direction of a metal part and the extending | stretching direction of a base material correspond, it can be set as the laminated body which suppressed the performance degradation with time. Here, for example, as shown in FIG. 3 (a), shrinkage and stretching direction D _A of the substrate, if the longitudinal direction D _B of the metal part are orthogonal, over time the substrate is in the stretching direction D _A Then, as shown in FIG.3 (b), the width | variety of the adjacent metal part 2 also shrink | contracts. This makes it difficult for the laminate to maintain the initial performance. In particular, if the shrinkage of the width of the metal part 2 is not uniform, it becomes difficult for the laminate to maintain the initial performance. In contrast, in the present invention, as shown in FIG. 2, the longitudinal direction D _B of the metal part, since where the extending direction D _A of the substrate coincide with each other, over time the substrate is contracted However, it is difficult for the pattern of the metal part 2 to change. Therefore, the initial performance of the laminate is easily maintained.
Hereinafter, the laminated body of this invention is demonstrated for every structure.

1. Base material The base material in this invention is a member holding the metal layer etc. which are mentioned later. Moreover, the base material in this invention is an extending | stretching base material. Details of the stretched substrate will be described later.

  The material of the base material is not particularly limited, and examples thereof include a resin. Examples of the resin include polyethylene, polypropylene, polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polycarbonate, polyamide, polyimide, polyamideimide, polytetrafluoroethylene, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, and the like. Of these, polyethylene terephthalate, polyethylene naphthalate, and polycarbonate are preferable.

  The thickness of the substrate is, for example, in the range of 10 μm to 200 μm, and may be in the range of 20 μm to 100 μm or less. If the thickness of the substrate is too small, the handling property may be deteriorated when forming the metal layer or the dielectric layer. If the thickness of the substrate is too large, the visible light transmittance may be decreased. is there.

  Although the manufacturing method of a base material is not specifically limited, For example, the method of shape | molding into a film form can be mentioned by melt-extruding raw material resin to a film form, or solution extrusion. A stretched substrate can be obtained by subjecting the obtained film to a stretching treatment. Moreover, you may perform at least 1 process of a heat setting process and a heat relaxation process as needed.

2. Metal layer The metal layer in this invention is a layer which is arrange | positioned on a base material and is comprised from a some metal part. The plurality of metal portions may be electrically independent or may not be electrically independent, but the former is preferable. This is because a decrease in radio wave permeability can be suppressed.

  The material of the metal layer is not particularly limited, and examples thereof include metals such as Ag, Al, Cu, Pd, Au, Pt, Ni, Bi, Ge, and Ga, and alloys containing at least one of these metals. Can do. Among these, silver, silver alloy, aluminum, aluminum alloy, copper, and copper alloy are preferable. Since these have high free electron density, even if it is a thin film, high infrared reflectivity can be obtained.

  Although the thickness of a metal layer is not specifically limited, For example, it exists in the range of 5 nm-50 nm or less. If the thickness of the metal layer is too small, the infrared reflectivity may be reduced, and if the thickness of the metal layer is too large, the visible light transmittance may be reduced.

3. Dielectric Layer The laminate of the present invention may have a dielectric layer. The dielectric layer can improve the visible light transmittance due to the interference effect with the metal layer. The dielectric layer material preferably has a refractive index with respect to visible light of, for example, 1.4 or more. This is because a good interference effect can be obtained. Examples of the material for the dielectric layer include Ti, Zr, Hf, Nb, Zn, Al, Ga, In, Tl, Ga, Sn, Si and other metal oxides, and at least one of these metals Among them, TiO ₂ , ZnO and SiO ₂ are preferable.

  The location of the dielectric layer 3 is not particularly limited. For example, as shown in FIG. 4, the dielectric layer 3 may be disposed between the base material 1 and the metal layer 200, or may be disposed so as to cover the metal part 2. In the latter case, the dielectric layer 3 is preferably disposed so as to fill the top surface portion of the metal portion 2 and the space of the adjacent metal portion 2. As will be described later, when there are two or more metal layers, a dielectric layer may be disposed between the metal layers. Moreover, it is preferable that the thickness of a dielectric material layer exists in the range of 5 nm-100 nm, for example.

4). Laminate The laminate of the present invention has infrared reflectivity and radio wave transmissivity. The infrared reflectivity can be evaluated, for example, by measuring an average light reflectance at a wavelength of 1500 nm to 2200 nm. Specifically, it is preferable to measure using ultraviolet visible near infrared spectrophotometry V-7200 (Japanese sentence structure). The average light reflectance is, for example, 60% or more, and preferably 70% or more. On the other hand, radio wave permeability can be evaluated, for example, by measuring radio wave transmittance at a frequency of 1 GHz. Specifically, it is preferable to measure by the KEC method using an electromagnetic wave shielding effect evaluator TSES-KEC (manufactured by Techno Science Japan). The radio wave transmittance is, for example, 80% or more, and preferably 95% or more.

  The substrate in the present invention is a stretched substrate. The stretched substrate refers to a stretched substrate, and the stretched substrate has a predetermined stretching direction. The stretching direction of the stretched substrate can be confirmed by heating the substrate to a temperature equal to or higher than the softening temperature and measuring the shrinkage rate. The shrinkage rate of the stretched substrate is, for example, 0.1% or more, and may be 0.3% or more. On the other hand, the shrinkage rate of the stretched substrate is, for example, 5% or less, and may be 4% or less. The stretched substrate may be a uniaxially stretched substrate or a biaxially stretched substrate. In the case of a biaxially stretched substrate, the direction in which the shrinkage rate is higher is the stretch direction of the substrate.

  The metal part in the present invention has a strip shape in plan view. As a typical example of the belt-like shape, as shown in FIG. 2, a metal part 2 having a straight belt-like shape can be exemplified. Moreover, in this invention, the longitudinal direction of a metal part and the extending | stretching direction of a base material correspond.

The band shape of the metal part is not particularly limited, and examples thereof include a straight line shape and a curved line shape. In the present invention, the longitudinal directions of the plurality of metal portions may be the same or different. For example, in FIG. 5 (a), the in the longitudinal direction _{D B} of the plurality of metal portions 2, respectively, are the same. On the other hand, in FIG. 5 (b), the a longitudinal D _B of the plurality of metal portions 2, respectively, are different, it is random.

The band-like shape of the metal part may or may not have a bent part. For example, in FIG. 5C, the band-like shape of the metal part 2 has a bent part 21. In this case, the longitudinal direction D _B of the metal part 2 that varies with the bending portion 21 are both preferably in the direction described above. The strip shape of the metal part may be a curved shape. The curved shape means that the metal part has at least a curved part. For example, in FIG.5 (d), the strip | belt shape of the metal part 2 is a waveform curve shape. In this case, the traveling direction P of the curve, the longitudinal direction D _B of the metal layer 2. Moreover, although a metal part is fundamentally transparent, depending on the shape and arrangement | positioning of a metal part, a metal part may be visually recognizable slightly from a transparent laminated body. Even in such a case, for example, the belt-like shapes as shown in FIGS. 5B to 5D are shapes that are not present in the past, and an effect of imparting design properties to the laminate can be obtained.

  The band shape of the metal part may be a continuous shape or a discontinuous shape. An example of the continuous shape is the shape shown in FIG. On the other hand, examples of the discontinuous shape include a dot shape. FIGS. 6A to 6D correspond to cases where the shapes shown in FIGS. 5A to 5D are discontinuous shapes, respectively. In addition, also when the strip | belt-shaped shape of a metal part is discontinuous shape, the effect of providing the designability to a laminated body is acquired similarly to the above.

  In the present invention, a pattern is obtained by arranging a plurality of metal parts in a direction intersecting the longitudinal direction of the metal parts. Examples of the pattern shape composed of a plurality of metal portions include a stripe shape. Moreover, it is preferable that the width | variety of a metal part and the width | variety of an adjacent metal part are in the range of 10 micrometers-5 mm, respectively. If these widths are too small, radio wave permeability may be reduced, and if these widths are too large, infrared reflectivity may be reduced.

  The laminate of the present invention may have one metal layer or may have two or more layers. For example, when the laminated body of this invention has two metal layers, they are called a 1st metal layer and a 2nd metal layer. Moreover, the metal part which comprises a 1st metal layer is called a 1st metal part, and the metal part which comprises a 2nd metal layer is called a 2nd metal part.

  Here, as shown in FIG. 7, the laminate 10 of the present invention has a first metal layer 200 a and a second metal layer 200 b as metal layers, and the base material 1 and the first metal layer in the thickness direction. 200a and the second metal layer 200b are preferably arranged in this order. In FIG. 7, the first dielectric layer 3a is disposed between the first metal layer 200a and the second metal layer 200b, and the second dielectric layer 3b is disposed so as to cover the surface of the second metal layer 200b. Has been.

  Moreover, it is preferable that the 1st metal part and the 2nd metal part overlap in planar view. Specifically, as shown in FIG. 7, in the laminate 10 of the present invention, the first metal part 2 a of the first metal layer 200 a and the second metal part 2 b of the second metal layer 200 b overlap in plan view. It is preferable to have the overlapping part 4 to be. This is because light leakage can be suppressed between the stacked metal portions.

Also, the width of the overlapping portion of the first metal part and second metal part overlap in a plan view and W _1. The value of W ₁ is, for example, 0.1μm or more, may also be 0.2μm or more, may be 0.3μm or more. On the other hand, the value of _{W 1} is, for example, 5mm or less.

  Moreover, when the laminated body of this invention has a 1st metal layer and a 2nd metal layer, it is preferable that the ratio of the transparent area | region in the effective area | region of a laminated body is small. The effective area of the laminate refers to an area where the laminate exhibits radio wave transparency and infrared reflectivity in plan view. Usually, the region is determined based on the first metal layer or the second metal layer located on the outermost side in plan view. On the other hand, the transparent region refers to a region in the effective region of the laminate in which neither the first metal layer nor the second metal layer exists in plan view. The ratio of the transparent area | region in the effective area | region of a laminated body is 10% or less, for example, it is preferable that it is 5% or less, and it is more preferable that it is 1% or less. In addition, it is preferable that the 1st metal part and the 1st metal part are alternately arrange | positioned on planar view.

  Moreover, as shown to Fig.8 (a), the laminated body 10 of this invention has the 1st metal layer 200a and the 2nd metal layer 200b as a metal layer, and the 1st metal layer 200a, The base material 1 and the second metal layer 200b may be arranged in this order. In FIG. 8A, the first dielectric layer 3a is disposed so as to cover the surface of the first metal layer 200a, and the second dielectric layer 3b is disposed so as to cover the surface of the second metal layer 200b. ing.

  Moreover, as shown in FIG.8 (b), the laminated body 10 of this invention has the 1st member which has the 1st base material 1a and the 1st metal layer 200a arrange | positioned on the 1st base material 1a, A second member having a second substrate 1b and a second metal layer 200b disposed on the second substrate 1b, wherein the first metal layer 200a and the second metal layer 200b face each other with an intermediate layer therebetween You may do it. In FIG. 8B, as an example of the intermediate layer, the first dielectric layer 3a disposed so as to cover the surface of the first metal layer 200a and the first dielectric layer 3a disposed so as to cover the surface of the second metal layer 200b. An intermediate layer having two dielectric layers 3b and an adhesive layer 5 for bonding the first dielectric layer 3a and the second dielectric layer 3b is shown.

  Since the laminate of the present invention is basically transparent, it may be difficult to recognize the arrangement of the metal part. Therefore, the laminated body of this invention may have the parameter | index which identifies arrangement | positioning of a metal part. As an example of the index, as illustrated in FIG. 9A, a notch portion 22 in which a part of at least one layer of the stacked body 10 is notched can be exemplified. Another example of the index is a mark 23 written on the surface of at least one layer of the laminate 10 as shown in FIG. 9B. Examples of the mark 23 include printing, a label, a concave portion, and a convex portion. As yet another example of the index, as shown in FIG. 9C, an ear portion 24 protruding from an end portion of at least one layer of the laminate 10 can be exemplified. Still another example of the index is a half-cut line provided in at least one layer of the laminate 10 as shown in FIG.

  Although the thickness of the laminated body of this invention is not specifically limited, For example, it is 1 mm or less, and 500 micrometers or less may be sufficient. Moreover, it is preferable that the laminated body of this invention is a film form. Moreover, the laminated body of this invention can be used for the arbitrary uses which require radio wave transmittance and infrared reflectivity. Especially, it is preferable to use for the closing member arrange | positioned at the opening part of a structure. An example of the closing member is a window member. By using the laminate of the present invention as a part of the closing member, it is possible to impart radio wave transparency and infrared reflectivity to the closing member.

B. Closing Member FIGS. 10 and 11 are schematic views for explaining the closing member of the present invention. FIG. 11A is a schematic plan view showing an example of the closing member of the present invention, and FIG. 11B corresponds to the AA cross-sectional view of FIG. As shown in FIG. 10, the closing member 30 of the present invention is a member disposed in the opening of the structure 40 and is typically a window member. Further, the closing member 30 shown in FIGS. 11A and 11B includes a plate-like member 32, a frame member 31 surrounding the plate-like member 32, and the laminated member 10 disposed on the plate-like member 32. Have. Further, as shown in FIG. 11 (a), the closing member 30 of the present invention, the longitudinal D _B of the metal portion is in the range of ± 45 ° with respect to the horizontal direction D _C.

  According to the present invention, since the longitudinal direction of the metal part is within a predetermined angle range with respect to the horizontal direction, it is possible to provide a closing member that suppresses a decrease in the transmission of linearly polarized waves in the vertical direction. Generally, radio waves include linearly polarized waves and circularly polarized waves. Linearly polarized waves are used in, for example, mobile phones and VICS (Vehicle Information and Communication System). On the other hand, circularly polarized waves are used in, for example, ETC (Electronic Toll Collection system) and GPS (Grobal Position System).

When the laminated body provided with the metal part having a belt-like shape is used as the closing member, there is a problem that the transmittance of the linearly polarized wave in the vertical direction is greatly influenced by the arrangement state of the laminated body. This problem will be described with reference to FIG. For example, as shown in FIG. 12 (a), longitudinal D _B of the metal part 2, if it is perpendicular to the horizontal direction D _C, vertical linear polarization 33 may not pass through the metal portion 2, adjacent It can penetrate only between the matching metal parts 2. In particular, as shown in FIG. 7, when a laminated body in which the first metal parts 2 a and the first metal parts 2 b are alternately arranged in a plan view is used, the linearly polarized wave in the vertical direction It cannot penetrate at all.

In contrast, in the present invention, as shown in FIG. 12 (b), the lengthwise direction D _B of the metal part 2, if it is within a predetermined angle with respect to a horizontal direction D _C, vertical Since the linearly polarized wave 33 has a sufficiently large wavelength, it can pass through the metal part 2. Therefore, it can be set as the closure member which suppressed the permeability | transmittance fall of the linearly polarized wave of the perpendicular direction.
Hereinafter, the closure member of this invention is demonstrated for every structure.

  The closing member of the present invention usually has at least the laminate described in “A. Laminate”. Furthermore, you may have a plate-shaped member and a frame member as needed. A plate-shaped member is a member which hold | maintains a laminated body normally. Examples of the material for the plate member include a glass plate. You may provide the contact bonding layer which adhere | attaches a plate-shaped member and the base material of a laminated body. In addition, the base material of a laminated body may have a plate-shaped member. On the other hand, the frame member is a member that usually surrounds the plate-like member and fixes the closing member to the opening of the structure. Examples of the material of the frame member include metal.

In the present invention, the longitudinal direction of the metal part in the closing member is set within a predetermined angle range with respect to the horizontal direction. Specifically, as shown in FIG. 11 (a), a longitudinal D _B of the metal part, in the range of ± 45 ° with respect to the horizontal direction D _C. Among them, D _B, to the D _C, is preferably in the range of ± 30 °, and more preferably within a range of ± 15 °.

  Moreover, in this invention, the structure provided with the closure member mentioned above in the opening part can also be provided. Examples of the structure include a building and a moving body such as an automobile and a train. In particular, when the structure has a conductive casing, radio waves enter and exit through the closing member, and therefore the laminate of the present invention is particularly effective. Examples of the structure having a conductive casing include an automobile and a train. In particular, it is effective to use the laminate of the present invention for a windshield of an automobile or a train.

  In addition, as described above, when a laminated body including a metal part having a belt-like shape is used as a closing member, there is a problem that the linearly polarized wave permeability in the vertical direction is greatly affected by the arrangement state of the laminated body. . When it is going to solve only this subject, the base material of a laminated body is not limited to an extending | stretching base material.

  Therefore, in the present invention, the closing member is disposed in the opening of the structure, has radio wave transparency and infrared reflectivity, and is disposed on the base material and the base material. The metal part has a strip shape, and the plurality of metal parts are respectively arranged in a direction intersecting the longitudinal direction of the metal part, and the metal It is also possible to provide a closing member characterized in that the longitudinal direction of the portion is within a range of ± 45 ° with respect to the horizontal direction. Similarly, a structure using this closing member can also be provided.

C. FIG. 13 is a schematic cross-sectional view showing an example of a method for producing a laminate according to the present invention. In FIG. 13, first, a stretched substrate is prepared as the substrate 1 (FIG. 13 (a)). Next, a metal layer 200 composed of a plurality of metal portions 2 is formed by, for example, vapor deposition (FIG. 13B). Under the present circumstances, the longitudinal direction of the metal part 2 and the extending | stretching direction of the base material 1 are made to correspond. Next, if necessary, the dielectric layer 3 is formed so as to cover the metal part 2 (FIG. 13C). Thereby, the laminated body of this invention is obtained.

According to this invention, the laminated body which suppressed the performance degradation with time can be obtained by making the longitudinal direction of a metal part correspond with the extending | stretching direction of a base material.
Hereinafter, the manufacturing method of the laminated body of this invention is demonstrated for every process.

1. Preparatory process The preparatory process in this invention is a process of preparing an extending | stretching base material as a base material. The stretched substrate may be a commercially available stretched substrate, or may be formed by performing a stretching treatment on the substrate (stretched substrate forming step). The stretched substrate may be a uniaxially stretched substrate or a biaxially stretched substrate. The stretching process is not particularly limited, and a known stretching process can be employed.

2. Metal layer formation process The metal layer formation process in this invention is a process of forming a metal layer on an extending | stretching base material. Although the method of forming a metal layer is not specifically limited, For example, the vapor deposition method can be mentioned. Examples of the vapor deposition method include dry processes such as sputtering, vacuum vapor deposition, CVD, and electron beam vapor deposition. Further, the metal layer may be formed by an evaporation method using a mask. By using a mask, film formation and patterning can be performed simultaneously.

  Moreover, in this invention, it is preferable that an extending | stretching base material formation process and a metal layer formation process are performed continuously. This is because productivity can be improved. Examples of a method for continuously performing the stretched substrate forming step and the metal layer forming step include a Roll to Roll method. For example, as shown in FIG. 14, in the Roll to Roll method, for example, by adjusting the tension between the unwinding roll 51 and the winding roll 52, the base material 1 can be stretched. Furthermore, the process 53 which forms a metal layer continuously can be performed with respect to the obtained extending | stretching base material. In this case, there exists an advantage that it is easy to obtain the extending | stretching base material with a high extending | stretching degree by matching the extending direction of a base material with the advancing direction of a base material. Therefore, the laminated body of this invention can be obtained efficiently by adjusting the longitudinal direction of a metal part so that it may match with the advancing direction of a base material.

3. Dielectric Layer Forming Step The laminate manufacturing method of the present invention may have a dielectric layer forming step for forming a dielectric layer, if necessary. The place where the dielectric layer is formed is not particularly limited, and as shown in FIG. 4, the dielectric layer 3 may be formed between the base material 1 and the metal layer 200, and the dielectric layer covers the metal part 2. 3 may be formed. Moreover, although it corresponds to one aspect of the latter, when two or more metal layers are present, a dielectric layer may be formed between the metal layers.

  Although the formation method of a dielectric material layer is not specifically limited, For example, dry processes, such as sputtering method, a vacuum evaporation method, CVD method, an electron beam evaporation method, can be mentioned. Note that if the formation of the metal layer and the formation of the dielectric layer are both dry processes, there is an advantage that the metal layer and the dielectric layer can be formed in-line. That is, it is preferable that the metal layer forming step and the dielectric layer forming step are continuously performed. In particular, in the present invention, it is preferable that the stretched substrate forming step, the metal layer forming step, and the dielectric layer forming step are performed continuously. Further, when two or more metal layers are formed, for example, a plurality of metal layer forming steps and dielectric layer forming steps may be repeated.

4). Laminated body About the laminated body obtained by this invention, since it is the same as that of the content described in the said "A. laminated body", description here is abbreviate | omitted.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the technical idea described in the claims of the present invention has substantially the same configuration and exhibits the same function and effect regardless of the case. It is included in the technical scope of the invention.

  Hereinafter, the present invention will be described more specifically with reference to examples.

[Example 1]
(Production of stretched substrate)
After melting polyethylene terephthalate (PET) with an extruder, it was extruded from a T-die, brought into close contact with a cooling drum whose surface temperature was adjusted to 20 ° C., and rapidly cooled to obtain an unstretched substrate having a thickness of 500 μm. Subsequently, after preheating with a preheating roll group whose temperature is adjusted to 90 ° C., the peripheral speed is changed between the drawing rolls whose temperature is adjusted to 90 ° C., and the film is longitudinally stretched 4.0 times in the flow direction, with a thickness of 125 μm. A substrate was obtained.

(Production of metal layer)
The produced stretched substrate was placed in a Canon Anelpa sputtering apparatus SPC-350UHV. Ag was used as a target. A vapor deposition mask was inserted between the target and the stretched substrate that was the vapor deposition target, and the distance between the mask and the vapor deposition target was adjusted to 100 μm. A stripe pattern was formed on the vapor deposition mask, and L / S = 200 μm / 200 μm. At this time, the direction in which the mask stripes extend and the extending direction of the base material were made to coincide. Then, it exhausted until the pressure in a chamber became 2.0 * 10 < ^-3 > Pa or less, Ar was introduced 25sccm as discharge gas. Thereafter, the pressure in the chamber was adjusted to 0.4 Pa, and the discharge current was set to 0.2 A using a direct current sputtering method. At this time, the stretched substrate temperature was room temperature. Thereby, a metal layer (Ag layer) in which the stripe direction (longitudinal direction) coincides with the stretching direction of the substrate was formed.

(Production of dielectric layer)
Next, the target was changed to Ti, the chamber was evacuated until the pressure in the chamber became 2.0 × 10 ⁻³ Pa or less, Ar was introduced at 10 sccm, O ₂ was introduced at 5 sccm, and the total flow rate was 15 sccm. Thereafter, the pressure in the chamber was adjusted to 0.4 Pa, and the discharge current was set to 0.3 A using a direct current sputtering method. At this time, the stretched substrate temperature was room temperature. Thereby, TiO ₂ was formed on the Ag layer. Thereby, the laminated body (film) in which the extending | stretching direction of a base material and the stripe direction (longitudinal direction) of a metal layer correspond was obtained.

[Comparative Example 1]
A laminate was produced in the same manner as in Example 1 except that the extending direction of the base material and the stripe direction (longitudinal direction) of the metal layer were orthogonal to each other.

[Evaluation]
Using the laminates obtained in Example 1 and Comparative Example 1, the visibility and radio wave permeability before and after the weather resistance test were evaluated. The weather resistance test was conducted with a xenon weather meter (SX75 manufactured by Suga Test Instruments Co., Ltd.) under the conditions of irradiance: 110 W / m ² , black panel temperature: 65 ° C., and irradiation time: 100 hours. Visibility was evaluated by the observer observing each sample in a state 30 cm away from the sample. In the evaluation, a sample in which the pattern was not visible was rated as ◯, and a sample in which the pattern was clearly visible was marked as x. Evaluation of radio wave permeability was performed by obtaining radio wave permeability at a frequency of 1 GHz. Specifically, it measured by KEC method using the electromagnetic wave shielding effect evaluator TSES-KEC (made by Techno Science Japan). The results are shown in Table 1.

  As shown in Table 1, in Comparative Example 1, the initial visibility and radio wave transmission were good, but deteriorated after the weather resistance test. In the laminate obtained in Comparative Example 1, the stretching direction of the base material and the stripe direction (longitudinal direction) of the metal layer were orthogonal to each other. The stripes were easily visible and the stripe pitch was narrowed. On the other hand, in Example 1, visibility and radio wave transmission were good before and after the weather resistance test.

DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Metal part 3 ... Dielectric layer 4 ... Overlapping part 10 ... Laminated body 30 ... Closure member 40 ... Structure 200 ... Metal layer

Claims (6)

A laminate having radio wave transparency and infrared reflectivity, and having a base material and a metal layer arranged on the base material and composed of a plurality of metal parts,
The substrate is a stretched substrate;
The metal part has a strip shape;
The longitudinal direction of the metal part and the extending direction of the base material match,
The plurality of metal parts are respectively arranged in a direction intersecting with a longitudinal direction of the metal part.   The width | variety of the said metal part and the width | variety between the said adjacent metal parts are in the range of 10 micrometers-5 mm, respectively, The laminated body of Claim 1 characterized by the above-mentioned.   The laminate according to claim 1 or 2, wherein the belt-like shape is linear or curved. The metal layer has a first metal layer and a second metal layer;
In the thickness direction, the base material, the first metal layer, the second metal layer are arranged in this order,
The first metal layer and the second metal layer have a first metal part and a second metal part, respectively, as the metal part,
The laminate according to any one of claims 1 to 3, wherein the first metal part and the second metal part have an overlapping part overlapping in plan view. A closing member disposed in an opening of the structure,
Having the laminate according to any one of claims 1 to 4,
The closing member according to claim 1, wherein a longitudinal direction of the metal portion is within a range of ± 45 ° with respect to a horizontal direction. A method for producing a laminate having radio wave transparency and infrared reflectivity, and having a base material, and a metal layer disposed on the base material and composed of a plurality of metal parts,
As the base material, a preparation step of preparing a stretched base material,
A metal layer forming step of forming the metal layer on the stretched substrate;
The metal part has a strip shape;
The longitudinal direction of the metal part and the extending direction of the base material match,
The method for producing a laminate, wherein the plurality of metal parts are respectively arranged in a direction intersecting a longitudinal direction of the metal parts.