JP2021134112A - Window member - Google Patents

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JP2021134112A
JP2021134112A JP2020030807A JP2020030807A JP2021134112A JP 2021134112 A JP2021134112 A JP 2021134112A JP 2020030807 A JP2020030807 A JP 2020030807A JP 2020030807 A JP2020030807 A JP 2020030807A JP 2021134112 A JP2021134112 A JP 2021134112A
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glass plate
resin layer
window member
resin
radio wave
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崚太 奥田
Ryota Okuda
崚太 奥田
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AGC Inc
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Asahi Glass Co Ltd
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Abstract

To provide a window member excellent in radio wave transmittance and excellent in weather resistance to humidity.SOLUTION: The present invention comprises a first glass plate, a radio wave transmitting member including at least one resin layer opposed to the main surface of the first glass plate, and a breathable waterproof material provided such that the resin layer is not exposed, in which the moisture proof material has the moisture vapor permeability at temperature 40°C, humidity 90%RH measured according to JIS Z 0208:1976 is 0.5(g/m2 day) or smaller.SELECTED DRAWING: Figure 1

Description

本発明は、窓部材に関する。 The present invention relates to window members.

近年、通信速度の高速化、通信容量の大容量化に伴い、通信に使用される電波の周波数帯域は、高周波数側に拡大している。例えば、近年の第４世代移動通信システム（以下「４Ｇ」という）や第５世代移動通信システム（以下「５Ｇ」という）においては、数百ＭＨｚ〜数十ＧＨｚの周波数帯域の電波が用いられている。
このような高周波数帯域の電波は、自動車分野の通信においても採用されており、例えば、欧州のＥＴＣでは５．９ＧＨｚ帯の電波が使用されている。 In recent years, as the communication speed has increased and the communication capacity has increased, the frequency band of radio waves used for communication has expanded to the high frequency side. For example, in recent 4th generation mobile communication systems (hereinafter referred to as "4G") and 5th generation mobile communication systems (hereinafter referred to as "5G"), radio waves in a frequency band of several hundred MHz to several tens of GHz are used. There is.
Such radio waves in the high frequency band are also used in communications in the automobile field. For example, ETC in Europe uses radio waves in the 5.9 GHz band.

このような数十ＧＨｚの高周波数帯域の電波を用いて、例えば車内に備えられたミリ波レーダーにより通信を行う場合、例えば、従来の数百ＭＨｚオーダーから５Ｇにおいて「ｓｕｂ６」と呼ばれる６ＧＨｚ未満の電波の通信と比較して窓ガラス等による電波の損失が顕著となる。
そこで、特許文献１においては、上記問題を解決するために、一部に樹脂からなる電波透過部材を嵌め込んで、部分的に電波透過率の高い領域を形成した窓部材が開示されている。 When communicating using radio waves in such a high frequency band of several tens of GHz, for example, by a millimeter-wave radar installed in a vehicle, for example, it is less than 6 GHz called "sub6" in 5 G from the conventional several hundred MHz order. Compared with radio wave communication, the loss of radio waves due to the window glass and the like becomes remarkable.
Therefore, in Patent Document 1, in order to solve the above problem, a window member is disclosed in which a radio wave transmitting member made of resin is partially fitted to partially form a region having a high radio wave transmitting rate.

国際公開第２０１７／１８８４１５号International Publication No. 2017/188415

特許文献１が開示する窓部材のように、例えば、ミリ波に対する透過率の高い電波透過部材として、樹脂が窓部材の（車内側の）表面に晒されている構成の場合、樹脂は少なくともガラスに比べて透湿率が高いため、とくに湿度に対する耐候性が十分ではなく、改善の余地があった。 Like the window member disclosed in Patent Document 1, for example, in the case of a radio wave transmitting member having a high transmittance for millimeter waves, in the case where the resin is exposed to the surface (inside the vehicle) of the window member, the resin is at least glass. Since the moisture permeability is higher than that of the above, the weather resistance to humidity is not sufficient, and there is room for improvement.

上記に鑑みて、本発明は、ミリ波に対する電波透過性に優れるとともに、湿度に対する耐候性に優れた窓部材を提供することを目的とする。 In view of the above, it is an object of the present invention to provide a window member having excellent radio wave transmission with respect to millimeter waves and excellent weather resistance with respect to humidity.

上記課題を解決する本発明の実施形態に係る窓部材は、第１ガラス板と、第１ガラス板の主表面と対向する少なくとも一層の樹脂層を含む電波透過部材と、樹脂層が露出しないように設けられた透湿防止材と、を備え、透湿防止材は、ＪＩＳ Ｚ０２０８：１９７６に準拠して測定した温度４０℃、湿度９０％ＲＨにおける透湿度が０．５（ｇ／ｍ２・ｄａｙ）以下である。 In the window member according to the embodiment of the present invention that solves the above problems, the first glass plate, the radio wave transmitting member including at least one resin layer facing the main surface of the first glass plate, and the resin layer are not exposed. The moisture permeation preventive material is provided with a moisture permeation preventive material provided in the above, and the moisture permeation preventive material has a moisture permeability of 0.5 (g / m 2) at a temperature of 40 ° C. and a humidity of 90% RH measured in accordance with JIS Z0208: 1976. day) or less.

また、本発明の一態様に係る窓部材において、透湿防止材は、少なくとも第１ガラス板側とは反対側の表面が露出していてもよい。 Further, in the window member according to one aspect of the present invention, at least the surface of the moisture permeation preventive material on the side opposite to the first glass plate side may be exposed.

また、本発明の一態様に係る窓部材において、少なくとも一層の樹脂層は、ウレタン樹脂含有層を含んでいてもよい。 Further, in the window member according to one aspect of the present invention, at least one layer of the resin layer may include a urethane resin-containing layer.

また、本発明の一態様に係る窓部材において、ウレタン樹脂含有層は、電波透過部材の第１ガラス板側に備えられていてもよい。 Further, in the window member according to one aspect of the present invention, the urethane resin-containing layer may be provided on the first glass plate side of the radio wave transmitting member.

また、本発明の一態様に係る窓部材において、ウレタン樹脂含有層は、第１ガラス板と接触していてもよい。 Further, in the window member according to one aspect of the present invention, the urethane resin-containing layer may be in contact with the first glass plate.

また、本発明の一態様に係る窓部材において、少なくとも一層の樹脂層は、ウレタン樹脂含有層の第１ガラス板側とは反対側の表面に設けられた、ポリカーボネート樹脂、アクリル樹脂、シクロオレフィンポリマー、フッ素樹脂、及びポリエーテルテレフタレート樹脂から選ばれる少なくとも１つの樹脂を含有する樹脂層を含んでいてもよい。 Further, in the window member according to one aspect of the present invention, at least one resin layer is provided on the surface of the urethane resin-containing layer on the side opposite to the first glass plate side, and is a polycarbonate resin, acrylic resin, or cycloolefin polymer. , Fluororesin, and a resin layer containing at least one resin selected from the polyether terephthalate resin.

また、本発明の一態様に係る窓部材において、少なくとも一層の樹脂層は、第１ガラス板とウレタン樹脂含有層との間に設けられた透明樹脂層を含んでいてもよい。 Further, in the window member according to one aspect of the present invention, at least one resin layer may include a transparent resin layer provided between the first glass plate and the urethane resin-containing layer.

また、本発明の一態様に係る窓部材において、少なくとも一層の樹脂層は、第１ガラス板の主表面と接触する透明樹脂層を含んでいてもよい。 Further, in the window member according to one aspect of the present invention, at least one layer of the resin layer may include a transparent resin layer in contact with the main surface of the first glass plate.

また、本発明の一態様に係る窓部材において、透明樹脂層は、ポリビニルブチラール樹脂を含有してもよい。 Further, in the window member according to one aspect of the present invention, the transparent resin layer may contain polyvinyl butyral resin.

また、本発明の一態様に係る窓部材において、透湿防止材は、コーティング材またはシール材でもよい。 Further, in the window member according to one aspect of the present invention, the moisture permeation prevention material may be a coating material or a sealing material.

また、本発明の一態様に係る窓部材において、コーティング材は、樹脂層の第１ガラス板側と反対側の表面が露出しないように設けられ、シール材が、樹脂層の端面が露出しないように設けられていてもよい。 Further, in the window member according to one aspect of the present invention, the coating material is provided so that the surface of the resin layer opposite to the first glass plate side is not exposed, and the sealing material is provided so that the end face of the resin layer is not exposed. It may be provided in.

また、本発明の一態様に係る窓部材において、コーティング材は、ＳｉＯ２、ポリブチレン、エポキシ樹脂、アクリル樹脂、シリコーン、ポリイミド、ビニルアルコール、及びシクロオレフィンポリマーから選ばれる少なくとも１つを含んでいてもよい。 Further, in the window member according to one aspect of the present invention, the coating material may contain at least one selected from SiO 2 , polybutylene, epoxy resin, acrylic resin, silicone, polyimide, vinyl alcohol, and cycloolefin polymer. good.

また、本発明の一態様に係る窓部材において、シール材は、ポリブチレン、エポキシ樹脂、アクリル樹脂、シリコーン、ポリイミド、ビニルアルコール、及びシクロオレフィンポリマーから選ばれる少なくとも１つを含んでいてもよい。 Further, in the window member according to one aspect of the present invention, the sealing material may contain at least one selected from polybutylene, epoxy resin, acrylic resin, silicone, polyimide, vinyl alcohol, and cycloolefin polymer.

また、本発明の一態様に係る窓部材は、平面視において電波透過部材を備える第１の領域と、第１ガラス板の主表面と対向する第２ガラス板を備える第２の領域とを有していてもよい。 Further, the window member according to one aspect of the present invention has a first region including a radio wave transmitting member in a plan view and a second region including a second glass plate facing the main surface of the first glass plate. You may be doing it.

また、本発明の一態様に係る窓部材は、第１ガラス板の平面視において、第１の領域の外縁は第１ガラス板の外縁よりも内側にあってもよい。 Further, in the window member according to one aspect of the present invention, the outer edge of the first region may be inside the outer edge of the first glass plate in the plan view of the first glass plate.

また、本発明の一態様に係る窓部材は、第２の領域において、少なくとも一層の樹脂層が、第１ガラス板と第２ガラス板の間に備える透明樹脂層を含んでいてもよい。 Further, the window member according to one aspect of the present invention may include a transparent resin layer in which at least one resin layer is provided between the first glass plate and the second glass plate in the second region.

また、本発明の一態様に係る窓部材において、透明樹脂層は、ポリビニルブチラール樹脂を含有していてもよい。 Further, in the window member according to one aspect of the present invention, the transparent resin layer may contain polyvinyl butyral resin.

また、本発明の一態様に係る窓部材において、第１ガラス板は厚さ１．１ｍｍ以上であり、平面視において電波透過部材を備える領域に、第１ガラス板の主表面に対して６７．５°の入射角で入射する周波数Ｆ（ＧＨｚ）の電波の透過率Ｔ（Ｆ）が、６０ＧＨｚ≦Ｆ≦１００ＧＨｚの範囲で下記式（１）を満足していてもよい。
Ｔ（Ｆ）＞−０．００６１×Ｆ＋０．９３８４ ・・・（１） Further, in the window member according to one aspect of the present invention, the first glass plate has a thickness of 1.1 mm or more, and 67. The following equation (1) may be satisfied in the range where the transmittance T (F) of the radio wave having a frequency F (GHz) incident at an incident angle of 5 ° is 60 GHz ≦ F ≦ 100 GHz.
T (F)> -0.0061 x F + 0.9384 ... (1)

また、本発明の実施形態のハウジング付窓部材は、上記窓部材と、窓部材に取り付けるハウジングとを備える。 Further, the window member with a housing according to the embodiment of the present invention includes the window member and a housing attached to the window member.

また、本発明の一態様に係るハウジング付窓部材は、第１の領域を覆うようにハウジングが第２の領域に設けられていてもよい。 Further, in the window member with a housing according to one aspect of the present invention, the housing may be provided in the second region so as to cover the first region.

本発明の実施形態に係る窓部材は、ミリ波に対する電波透過性及び湿度に対する耐候性に優れる。 The window member according to the embodiment of the present invention is excellent in radio wave transmission to millimeter waves and weather resistance to humidity.

図１（ａ）は、第１の実施形態に係る窓部材の一例の正面図である。図１（ｂ）は図１（ａ）のＸ−Ｘ線における窓部材の断面図である。図１（ｃ）は、図１（ｂ）に示す窓部材において、透湿防止材を設けた場合における窓部材の断面図である。FIG. 1A is a front view of an example of a window member according to the first embodiment. FIG. 1B is a cross-sectional view of a window member taken along line XX of FIG. 1A. FIG. 1 (c) is a cross-sectional view of the window member shown in FIG. 1 (b) when a moisture permeation preventive material is provided. 図２（ａ）は、第１の実施形態に係る窓部材の一例の正面図である。図２（ｂ）は図２（ａ）のＸ−Ｘ線における窓部材の断面図である。図２（ｃ）は、図２（ｂ）に示す窓部材において、透湿防止材を設けた場合における窓部材の断面図である。FIG. 2A is a front view of an example of the window member according to the first embodiment. FIG. 2B is a cross-sectional view of the window member taken along line XX of FIG. 2A. FIG. 2C is a cross-sectional view of the window member shown in FIG. 2B when a moisture permeation preventive material is provided. 図３は、第１の実施形態に係る窓部材が自動車用の窓ガラスとして用いられた状態を表す概念図である。FIG. 3 is a conceptual diagram showing a state in which the window member according to the first embodiment is used as a window glass for an automobile. 図４は、図３におけるＳ部分の拡大図である。FIG. 4 is an enlarged view of the S portion in FIG. 図５は、図４のＹ−Ｙ線における断面図である。FIG. 5 is a cross-sectional view taken along the line YY of FIG. 図６は、第２の実施形態に係る窓部材の断面図である。FIG. 6 is a cross-sectional view of the window member according to the second embodiment. 図７は、第３の実施形態に係る窓部材の断面図である。FIG. 7 is a cross-sectional view of the window member according to the third embodiment. 図８は、第４の実施形態に係る窓部材の断面図である。FIG. 8 is a cross-sectional view of the window member according to the fourth embodiment. 図９は、第５の実施形態に係る窓部材の断面図である。FIG. 9 is a cross-sectional view of the window member according to the fifth embodiment.

以下、本発明の実施形態について、詳細に説明する。また、以下の図面において、同じ作用を奏する部材・部位には同じ符号を付して説明することがあり、重複する説明は省略または簡略化することがある。また、図面に記載の実施形態は、本発明を明瞭に説明するために模式化されており、実際の製品のサイズや縮尺を必ずしも正確に表したものではない。 Hereinafter, embodiments of the present invention will be described in detail. Further, in the following drawings, members / parts having the same function may be described with the same reference numerals, and duplicate description may be omitted or simplified. Further, the embodiments described in the drawings are modeled for clearly explaining the present invention, and do not necessarily accurately represent the size and scale of an actual product.

本明細書において、「透明」とは、可視光に対して光透過性を有することを意味する。具体的には波長４２０ｎｍ〜６５０ｎｍにおける光透過率が７０％以上に維持されていることを意味する。
本明細書において電波透過性が高い／低い、等の評価については、特にことわりがない場合、６０ＧＨｚ〜１００ＧＨｚの周波数に対するミリ波の電波透過性のことを意味する。 As used herein, "transparent" means having light transmission to visible light. Specifically, it means that the light transmittance at a wavelength of 420 nm to 650 nm is maintained at 70% or more.
Regarding the evaluation of high / low radio wave transmission in the present specification, unless otherwise specified, it means the radio wave transmission of millimeter waves for frequencies of 60 GHz to 100 GHz.

本発明の実施形態に係る窓部材は、第１ガラス板と、第１ガラス板の主表面と対向する少なくとも一層の樹脂層を含む電波透過部材と、樹脂層が露出しないように設けられた透湿防止材と、を備える。そして、透湿防止材は、ＪＩＳ Ｚ０２０８：１９７６に準拠して測定した温度４０℃、湿度９０％ＲＨにおける透湿度が０．５（ｇ／ｍ２・ｄａｙ）以下である。 The window member according to the embodiment of the present invention includes a first glass plate, a radio wave transmitting member including at least one resin layer facing the main surface of the first glass plate, and a transparent member provided so that the resin layer is not exposed. It is provided with a moisture-proof material. The moisture permeation prevention member is, JIS Z0208: 1976 Temperature 40 ° C. as measured in accordance with moisture permeability of moisture 90% RH is 0.5 (g / m 2 · day ) or less.

本発明の実施形態に係る窓部材は、電波透過部材を備えることにより、高周波数帯域のミリ波の電波に対して高い透過性を有する。本発明の実施形態に係る窓部材において、電波透過部材は、第１ガラス板の主表面と対向して設けられる。すなわち、第１ガラス板の主表面に積層されて設けられる。電波透過部材は、少なくとも一層の樹脂層を含んでおり、樹脂層の種類、数、及び積層順は、電波透過性を有する限りにおいて、特に制限されない。 The window member according to the embodiment of the present invention is provided with a radio wave transmitting member, so that the window member has high transparency to a millimeter wave radio wave in a high frequency band. In the window member according to the embodiment of the present invention, the radio wave transmitting member is provided so as to face the main surface of the first glass plate. That is, it is provided so as to be laminated on the main surface of the first glass plate. The radio wave transmitting member includes at least one resin layer, and the type, number, and stacking order of the resin layers are not particularly limited as long as they have radio wave transmission.

また、本発明の実施形態に係る窓部材は、電波透過部材に含まれる樹脂層が露出しないように、透湿度が上記特定値以下である透湿防止材を備える。ここで、樹脂層が「露出しない」とは、透湿防止材により樹脂層の主表面ないし端面の全部または一部が、窓部材の最外面（最表面）に存在していない状態、あるいは窓部材の内部の閉鎖された空間にのみ面している状態を意味する。これにより、樹脂層の主表面ないし端面が外気（大気）中に曝されなくなり、外気（大気）中の水分の吸収を抑制できるため、湿度に対する耐候性に優れた窓部材を提供できる。電波透過部材に含まれる樹脂層が露出しないのであれば、透湿防止材が設けられる態様は特に制限されない。 Further, the window member according to the embodiment of the present invention is provided with a moisture permeation preventive material having a moisture permeability of the above specific value or less so that the resin layer contained in the radio wave transmitting member is not exposed. Here, "the resin layer is not exposed" means that all or part of the main surface or end surface of the resin layer is not present on the outermost surface (outermost surface) of the window member due to the moisture permeation preventive material, or the window. It means a state facing only the closed space inside the member. As a result, the main surface or end face of the resin layer is not exposed to the outside air (atmosphere), and the absorption of moisture in the outside air (atmosphere) can be suppressed, so that a window member having excellent weather resistance to humidity can be provided. As long as the resin layer contained in the radio wave transmitting member is not exposed, the mode in which the moisture permeation preventive material is provided is not particularly limited.

本発明の実施形態に係る窓部材は、第１ガラス板の主表面と対向する一部の領域が電波透過部材を備えてもよく、第１ガラス板の主表面と対向する全領域が電波透過部材を備えてもよい。
以下、本発明の第１〜第５の実施形態を例示して、本発明に係る窓部材を具体的に説明する。本発明の第１〜第３の実施形態としては第１ガラス板の主表面と対向する一部の領域が電波透過部材を備える窓部材、また、第４及び第５の実施形態として第１ガラス板の主表面と対向する全領域が電波透過部材を備える窓部材につき説明をする。なお、本発明の実施形態は以下に説明するものに限定されない。 The window member according to the embodiment of the present invention may include a radio wave transmitting member in a part of the area facing the main surface of the first glass plate, and the entire area facing the main surface of the first glass plate transmits radio waves. A member may be provided.
Hereinafter, the window member according to the present invention will be specifically described by exemplifying the first to fifth embodiments of the present invention. As the first to third embodiments of the present invention, a window member in which a part of the region facing the main surface of the first glass plate is provided with a radio wave transmitting member, and as the fourth and fifth embodiments, the first glass. A window member having a radio wave transmitting member in the entire region facing the main surface of the plate will be described. The embodiments of the present invention are not limited to those described below.

［第１の実施形態］
図１（ａ）は、第１の実施形態の窓部材１０の正面図であり、図１（ｂ）、図１（ｃ）は図１（ａ）のＸ−Ｘ線における断面図であり、図１（ｂ）は透湿防止材１６を不図示とした場合、また、図１（ｃ）は透湿防止材１６を設けた場合の窓部材１０の断面図である。
本実施形態の窓部材１０は、平面視において電波透過部材１２を備える領域である第１の領域Ａと、平面視において第１ガラス板１１の主表面と対向する第２ガラス板１３を備える領域である第２の領域Ｂとを備える。図１（ａ）では、第１の領域Ａの外縁は第１ガラス板１１の外縁よりも内側にある場合を示しているが、本実施形態の窓部材１０は図２（ａ）に示す窓部材２０のように、窓部材の平面視において、第１の領域Ａの外縁の一部が第１ガラス板２１の外縁の一部を共有する（重複する）形態でもよい。以下では、第１の領域Ａの外縁は第１ガラス板１１の外縁よりも内側にある窓部材１０について中心に説明するが、第１の領域Ａの外縁の一部が第１ガラス板２１の外縁の一部を共有する（重複する）形態である窓部材２０についても同様の説明があてはまる。 [First Embodiment]
1 (a) is a front view of the window member 10 of the first embodiment, and FIGS. 1 (b) and 1 (c) are cross-sectional views taken along line XX of FIG. 1 (a). FIG. 1B is a cross-sectional view of the window member 10 when the moisture permeation preventive material 16 is not shown, and FIG. 1C is a cross-sectional view of the window member 10 when the moisture permeation preventive material 16 is provided.
The window member 10 of the present embodiment has a first region A which is a region including a radio wave transmitting member 12 in a plan view and a region including a second glass plate 13 facing the main surface of the first glass plate 11 in a plan view. A second region B is provided. FIG. 1A shows a case where the outer edge of the first region A is inside the outer edge of the first glass plate 11, but the window member 10 of the present embodiment is the window shown in FIG. 2A. Like the member 20, in a plan view of the window member, a part of the outer edge of the first region A may share (overlap) a part of the outer edge of the first glass plate 21. In the following, the outer edge of the first region A will be mainly described with respect to the window member 10 which is inside the outer edge of the first glass plate 11, but a part of the outer edge of the first region A is the first glass plate 21. The same description applies to the window member 20 which is a form in which a part of the outer edge is shared (overlapping).

第１の実施形態の窓部材１０は、第１の領域Ａにおいて電波透過部材１２が第１ガラス板１１に接合されており、第２の領域Ｂにおいて第２ガラス板１３が、透明樹脂層１４を介して第１ガラス板１１に接合されている。 In the window member 10 of the first embodiment, the radio wave transmitting member 12 is joined to the first glass plate 11 in the first region A, and the second glass plate 13 is the transparent resin layer 14 in the second region B. It is joined to the first glass plate 11 via.

本実施形態において、第１の領域Ａは窓部材１０の用途に応じて、６０ＧＨｚ〜１００ＧＨｚの周波数の電波に対して高い電波透過性が要求される部分に形成される。例えば、窓部材１０を自動車の窓ガラスとして用いる場合は、第１の領域Ａはミリ波レーダーの周辺等に形成される。 In the present embodiment, the first region A is formed in a portion where high radio wave transparency is required for radio waves having a frequency of 60 GHz to 100 GHz, depending on the use of the window member 10. For example, when the window member 10 is used as a window glass of an automobile, the first region A is formed around a millimeter wave radar or the like.

本実施形態において、窓部材１０の総厚は３．５ｍｍ以上１０ｍｍ以下が好ましい。この場合、第１ガラス板１１が厚くなるため、第１ガラス板１１に物体が衝突したときのクラック発生が起こりにくく、かつクラックが発生したとしてもクラックの距離が伸びにくくなるため好ましい。なお、第１ガラス板１１は特にことわりがない限り、例えば、車両に取り付けたときに車外側に位置し、電波透過部材１２および第２ガラス板１３は、第１ガラス板１１よりも車内側に位置するものとする。 In the present embodiment, the total thickness of the window member 10 is preferably 3.5 mm or more and 10 mm or less. In this case, since the first glass plate 11 becomes thicker, cracks are less likely to occur when an object collides with the first glass plate 11, and even if cracks occur, the crack distance is less likely to increase, which is preferable. Unless otherwise specified, the first glass plate 11 is located on the outside of the vehicle when attached to the vehicle, and the radio wave transmitting member 12 and the second glass plate 13 are located on the inside of the vehicle rather than the first glass plate 11. It shall be located.

（第１ガラス板、第２ガラス板）
本実施形態における第１ガラス板１１及び第２ガラス板１３の組成は特に限定されない。例えば、各成分の酸化物基準のモル百分率表示で、ＳｉＯ２を５０〜８０％、Ｂ２Ｏ３を０〜１０％、Ａｌ２Ｏ３を０．１〜２５％、Ｌｉ２Ｏ、Ｎａ２Ｏ及びＫ２Ｏからなる群より選ばれる少なくとも１種のアルカリ金属酸化物を合計で３〜３０％、ＭｇＯを０〜２５％、ＣａＯを０〜２５％、ＳｒＯを０〜５％、ＢａＯを０〜５％、ＺｒＯ２を０〜５％及びＳｎＯ２を０〜５％含むガラス板を、第１ガラス板１１及び第２ガラス板１３として使用できる。特にミリ波に対して優れた電波透過性を得るには、第１ガラス板１１を後述の組成Ａのガラス、または後述の組成Ｃのガラスにより構成することが好ましい。 (1st glass plate, 2nd glass plate)
The composition of the first glass plate 11 and the second glass plate 13 in the present embodiment is not particularly limited. For example, in the oxide-based molar percentage display of each component, SiO 2 is 50 to 80%, B 2 O 3 is 0 to 10%, Al 2 O 3 is 0.1 to 25%, Li 2 O, Na 2 O and K 2 3 to 30% of at least one alkali metal oxide selected from the group consisting of O in total, the MgO 0 to 25%, 0 to 25% of CaO, 0 to 5% of SrO, BaO, Glass plates containing 0 to 5%, ZrO 2 of 0 to 5%, and SnO 2 of 0 to 5% can be used as the first glass plate 11 and the second glass plate 13. In particular, in order to obtain excellent radio wave transmission with respect to millimeter waves, it is preferable that the first glass plate 11 is made of a glass having a composition A described later or a glass having a composition C described later.

また、第１ガラス板１１の厚さは、強度確保のため、特に強度の指標となる飛び石耐性を高めるため、１．１ｍｍ以上が好ましく、１．５ｍｍ以上がより好ましく、１．８ｍｍ以上がさらに好ましい。また、第１ガラス板１１の厚さの上限は特に限定されないが、厚くなれば重量も増えるため、通常は３．０ｍｍ以下が望ましい。
なお、第１ガラス板１１と第２ガラス板１３の組成や、これらの厚さは、同じでも異なってもよい。 Further, the thickness of the first glass plate 11 is preferably 1.1 mm or more, more preferably 1.5 mm or more, further preferably 1.8 mm or more, in order to secure strength and to increase resistance to stepping stones, which is an index of strength. preferable. The upper limit of the thickness of the first glass plate 11 is not particularly limited, but it is usually preferably 3.0 mm or less because the weight increases as the thickness increases.
The composition of the first glass plate 11 and the second glass plate 13 and their thicknesses may be the same or different.

［ガラス材料］
第１ガラス板１１および第２ガラス板１３としては、一例として無アルカリガラスを使用できる。無アルカリガラスは、アルカリ成分の酸化物基準のモル百分率表示の含有量が合計で１．０％以下のガラスである。また、無アルカリガラスとしては、該含有量が合計で０．１％以下のガラスも好ましく使用できる。また、他の成分の含有量は特に限定されないが、例えば各成分の酸化物基準のモル百分率表示の含有量が、
５０％≦ＳｉＯ２≦８０％
０％≦Ａｌ２Ｏ３≦３０％
０％≦Ｂ２Ｏ３≦２５％
０％≦ＭｇＯ≦２５％
０％≦ＣａＯ≦２５％
０％≦ＳｒＯ≦２５％
０％≦ＢａＯ≦２５％
０％≦ＺｒＯ２≦５％
５％≦ＲＯ≦４０％（ＲＯは、ＭｇＯ、ＣａＯ、ＳｒＯ、ＢａＯの合計量を表す）
を満足することが好ましい。 [Glass material]
As the first glass plate 11 and the second glass plate 13, non-alkali glass can be used as an example. The non-alkali glass is a glass having a total content of 1.0% or less in terms of molar percentage of the alkali component based on the oxide. Further, as the non-alkali glass, glass having a total content of 0.1% or less can be preferably used. Further, the content of other components is not particularly limited, but for example, the content of each component on the molar percentage display based on the oxide can be determined.
50% ≤ SiO 2 ≤ 80%
0% ≤ Al 2 O 3 ≤ 30%
0% ≤ B 2 O 3 ≤ 25%
0% ≤ MgO ≤ 25%
0% ≤ CaO ≤ 25%
0% ≤ SrO ≤ 25%
0% ≤ BaO ≤ 25%
0% ≤ ZrO 2 ≤ 5%
5% ≤ RO ≤ 40% (RO represents the total amount of MgO, CaO, SrO, BaO)
It is preferable to satisfy.

また、第１ガラス板および第２ガラス板としては、例えば、以下に示す組成（以下、「組成Ａ」、「組成Ｂ」、「組成Ｃ」ともいう。）のガラスも使用できる。 Further, as the first glass plate and the second glass plate, for example, glass having the following composition (hereinafter, also referred to as “composition A”, “composition B”, “composition C”) can be used.

（組成Ａのガラス）
組成Ａのガラスは、各成分の酸化物基準のモル百分率表示の含有量が以下の関係を満足するガラスである。
５０≦ＳｉＯ２≦８５
０≦Ａｌ２Ｏ３≦２０
４≦Ｒ２Ｏ≦２２（Ｒ２Ｏは、アルカリ金属酸化物の合計量を表す）
０≦ＲＯ≦２０（ＲＯは、ＭｇＯ、ＣａＯ、ＳｒＯ、ＢａＯの合計量を表す）
０≦Ｎａ２Ｏ／Ｒ２Ｏ≦０．８
０≦Ｋ２Ｏ／Ｒ２Ｏ≦０．７ (Glass of composition A)
The glass of composition A is a glass in which the content of each component in terms of molar percentage based on the oxide satisfies the following relationship.
50 ≤ SiO 2 ≤ 85
0 ≤ Al 2 O 3 ≤ 20
4 ≦ R 2 O ≦ 22 (R 2 O represents the total amount of alkali metal oxides)
0 ≦ RO ≦ 20 (RO represents the total amount of MgO, CaO, SrO, BaO)
0 ≤ Na 2 O / R 2 O ≤ 0.8
0 ≤ K 2 O / R 2 O ≤ 0.7

（組成Ｂ、組成Ｃのガラス）
また、第１ガラス板および第２ガラス板には、各成分の酸化物基準のモル百分率の表示の合計含有量で、ＳｉＯ２、Ｂ２Ｏ３、Ａｌ２Ｏ３の総量が７２％以上になる「組成Ｂ」のガラスを用いてもよい。「組成Ｂ」のガラスを第１ガラス板１１に使用することで、ガラス強度を確保しやすく、特に飛び石耐性が高められ好ましい。さらに、組成Ｂのガラスを第１ガラス板１１に用いることで、ミリ波の電波透過率を高く維持でき好ましい。なお、第２ガラス板１３は化学強化処理が施されていると、より高い強度が得られる。 (Glass of composition B and composition C)
Further, on the first glass plate and the second glass plate, the total amount of SiO 2 , B 2 O 3 , and Al 2 O 3 is 72% or more in the total content of the molar percentage of each component based on the oxide. You may use the glass of "composition B". By using the glass of "composition B" for the first glass plate 11, it is easy to secure the glass strength, and it is particularly preferable because the resistance to stepping stones is enhanced. Further, it is preferable to use the glass having the composition B for the first glass plate 11 because the radio wave transmittance of the millimeter wave can be maintained high. When the second glass plate 13 is chemically strengthened, higher strength can be obtained.

また、組成Ｂのガラスとしては、各成分の酸化物基準のモル百分率表示の含有量が以下の関係を満足するガラス（「組成Ｃ」ともいう）がより好ましい。
７２≦ＳｉＯ２＋Ａｌ２Ｏ３＋Ｂ２Ｏ３≦９８
５５≦ＳｉＯ２≦８７
０≦Ａｌ２Ｏ３≦２０
０≦Ｂ２Ｏ３≦２５
０≦Ｒ２Ｏ≦５（Ｒ２Ｏは、アルカリ金属酸化物の合計量を表す）
０≦ＲＯ≦２０（ＲＯは、ＭｇＯ、ＣａＯ、ＳｒＯ、ＢａＯの合計量を表す） Further, as the glass having the composition B, a glass (also referred to as “composition C”) in which the content of each component in terms of molar percentage based on the oxide satisfies the following relationship is more preferable.
72 ≤ SiO 2 + Al 2 O 3 + B 2 O 3 ≤ 98
55 ≤ SiO 2 ≤ 87
0 ≤ Al 2 O 3 ≤ 20
0 ≤ B 2 O 3 ≤ 25
0 ≦ R 2 O ≦ 5 (R 2 O represents the total amount of alkali metal oxides)
0 ≦ RO ≦ 20 (RO represents the total amount of MgO, CaO, SrO, BaO)

（電波透過部材）
電波透過部材１２を構成する材料は、所定のミリ波の電波透過を高くできる材料であれば特に限定されないが、低誘電率の材料や、低ｔａｎδ（誘電正接；δは損失角）の材料が好ましく、特にｔａｎδが低いことで、誘電損失の小さい材料が好ましく用いられる。なお、誘電正接（ｔａｎδ）は、２５℃、２８ＧＨｚで、日本工業規格（ＪＩＳ Ｒ １６４１：２００７）に規定されている方法により、空洞共振器及びベクトルネットワークアナライザを用いて測定された値である。 (Radio wave transmission member)
The material constituting the radio wave transmitting member 12 is not particularly limited as long as it can increase the radio wave transmission of a predetermined millimeter wave, but a material having a low dielectric constant or a material having a low tan δ (dielectric loss tangent; δ is a loss angle) can be used. A material having a small dielectric loss is preferably used, preferably because the tan δ is low. The dielectric loss tangent (tan δ) is a value measured at 25 ° C. and 28 GHz using a cavity resonator and a vector network analyzer by a method specified in Japanese Industrial Standards (JIS R 1641: 2007).

電波透過部材１２は透明でも透明でなくてもよい。視認性の観点からは、透明であることが好ましいが、不透明でも領域Ａには、後述するハウジング１２０が取り付けられるのであれば、例えば、車両の乗員の視界を必要以上に妨げない。 The radio wave transmitting member 12 may or may not be transparent. From the viewpoint of visibility, it is preferable that it is transparent, but even if it is opaque, if the housing 120 described later is attached to the area A, for example, the visibility of the occupant of the vehicle is not obstructed more than necessary.

本発明の実施形態において、電波透過部材は少なくとも一層の樹脂層を含む。樹脂層を構成する材料としては特に限定されないが、一般的なガラス材料に比較して高い電波透過率を有することが好ましい。樹脂層を構成する材料としては、例えば、ＡＢＳ（ａｃｒｙｌｏｎｉｔｒｉｌｅ ｂｕｔａｄｉｅｎｅ ｓｔｙｒｅｎｅ；アクリロニトリルブタジエンスチレン）、ＰＶＣ（ｐｏｌｙｖｉｎｙｌ ｃｈｌｏｒｉｄｅ；ポリビニルクロライド）、フッ素系樹脂、ＰＣ（ポリカーボネート）、ＣＯＰ（シクロオレフィンポリマー）、ＳＰＳ（シンジオタクチックポリスチレン樹脂）、変性ＰＰＥ（変性ポリフェニレンエーテル）、ウレタン樹脂、ポリスチレン（ＰＳ）等を使用できる。 In the embodiment of the present invention, the radio wave transmitting member includes at least one resin layer. The material constituting the resin layer is not particularly limited, but it is preferable that the material has a higher radio wave transmittance than a general glass material. Examples of the material constituting the resin layer include ABS (acrylonirile butadiene style; acrylonitrile butadiene styrene), PVC (polyvinyl chloride), fluororesin, PC (polycarbonate), COP (cycloolefin polymer), and SPS (syndi). Otactic polystyrene resin), modified PPE (modified polyphenylene ether), urethane resin, polystyrene (PS) and the like can be used.

図１（ｂ）は第１の実施形態の窓部材１０の（透湿防止材不図示の）断面図であり、第１の領域Ａにおいて電波透過部材１２は第１の樹脂層１２ａおよび第２の樹脂層１２ｂの計２種の層からなる場合を例示している。
本実施形態では、電波透過部材１２を構成する第１の樹脂層１２ａおよび第２の樹脂層１２ｂのうち、第１ガラス板１１側である第１の樹脂層１２ａは、加熱及び加圧工程を経ることにより第１ガラス板１１に直接接合できる材料により構成されている。これにより、第１樹脂層１２ａは、第１ガラス板１１に直接接合されている。 FIG. 1B is a cross-sectional view (not shown) of the window member 10 of the first embodiment, in which the radio wave transmitting member 12 is the first resin layer 12a and the second resin layer 12a in the first region A. The case where the resin layer 12b of the above is composed of a total of two types of layers is illustrated.
In the present embodiment, of the first resin layer 12a and the second resin layer 12b constituting the radio wave transmitting member 12, the first resin layer 12a on the first glass plate 11 side is subjected to a heating and pressurizing step. It is made of a material that can be directly bonded to the first glass plate 11 by passing through. As a result, the first resin layer 12a is directly bonded to the first glass plate 11.

また、本実施形態の窓部材１０において、加熱及び加圧工程を経ることにより第１ガラス板１１に直接接合できる、第１の樹脂層１２ａの材料としては、例えばウレタン樹脂が挙げられる。ウレタン樹脂を含有する層（ウレタン樹脂含有層）は、１層で構成してもよいが、強度を向上させるために、複数層積層して第１の樹脂層１２ａとして使用することが好ましい。このように、ウレタン樹脂を第１の樹脂層１２ａとして用いる場合のウレタン樹脂含有層の層数は、ガラスとの接着強度及び電波透過性の観点から、１〜５層の範囲であればよく、特に複層にすることで第１ガラス板１１とウレタン樹脂含有層との密着性や接着強度が向上することから、２〜５層の範囲が好ましく、２〜４層がより好ましく、２層が特に好ましい。また、ウレタン樹脂含有層の合計の厚さは、ガラスとの接着強度の観点からは１．０ｍｍ以上が好ましく、１．２ｍｍ以上がより好ましい。また、ウレタン樹脂含有層の合計の厚さは、ミリ波の電波透過性の観点からは２ｍｍ以下が好ましく、１．８ｍｍ以下がより好ましい。なお、図１（ｂ）に示す窓部材１０は、第１の樹脂層１２ａとして、１種の（樹脂）材料、例えばウレタン樹脂含有層を１層または複数層（２〜５層）積層した場合の断面模式図である。 Further, in the window member 10 of the present embodiment, examples of the material of the first resin layer 12a that can be directly bonded to the first glass plate 11 through the heating and pressurizing steps include urethane resin. The urethane resin-containing layer (urethane resin-containing layer) may be composed of one layer, but in order to improve the strength, it is preferable to stack a plurality of layers and use it as the first resin layer 12a. As described above, when the urethane resin is used as the first resin layer 12a, the number of layers of the urethane resin-containing layer may be in the range of 1 to 5 from the viewpoint of adhesive strength with glass and radio wave transmission. In particular, since the adhesion and adhesive strength between the first glass plate 11 and the urethane resin-containing layer are improved by forming a plurality of layers, the range of 2 to 5 layers is preferable, 2 to 4 layers are more preferable, and 2 layers are preferable. Especially preferable. The total thickness of the urethane resin-containing layers is preferably 1.0 mm or more, more preferably 1.2 mm or more, from the viewpoint of adhesive strength with glass. The total thickness of the urethane resin-containing layers is preferably 2 mm or less, more preferably 1.8 mm or less, from the viewpoint of radio wave transmission of millimeter waves. The window member 10 shown in FIG. 1B is a case where one kind of (resin) material, for example, a urethane resin-containing layer is laminated as one layer or a plurality of layers (2 to 5 layers) as the first resin layer 12a. It is a cross-sectional schematic diagram of.

また、ウレタン樹脂含有層としては、高いミリ波透過性、及び強度の観点から、ＡＳＴＭ規格Ｄ６２４，Ｄｉｅ Ｃの試験方法における引裂強度が４０ＫＮ／ｍ以上のものが好ましく、５０ＫＮ／ｍ以上のものがより好ましい。さらに、ウレタン樹脂含有層としては、高いミリ波透過性、及び強度の観点から、ＡＳＴＭ規格Ｄ４１２の試験方法における引張強度が３０ＭＰａ以上のものが好ましく、４０ＭＰａ以上のものがさらに好ましい。 The urethane resin-containing layer preferably has a tear strength of 40 KN / m or more, and 50 KN / m or more in the test method of ASTM standard D624, Die C, from the viewpoint of high millimeter wave permeability and strength. More preferred. Further, the urethane resin-containing layer preferably has a tensile strength of 30 MPa or more, and more preferably 40 MPa or more in the test method of ASTM standard D412, from the viewpoint of high millimeter wave permeability and strength.

本実施形態では、電波透過部材１２を構成する第１の樹脂層１２ａ及び第２の樹脂層１２ｂのうち、第１の樹脂層１２ａに対して第１ガラス板１１側とは反対側に設けられる第２の樹脂層１２ｂは、ミリ波の電波に対して高い電波透過性を有していればよい。その材料としては、例えば、ポリカーボネート樹脂、アクリル樹脂、シクロオレフィンポリマー（ＣＯＰ）、フッ素樹脂、ポリエーテルテレフタレート樹脂、等を使用できる。なお、第２の樹脂層１２ｂの材料としては、製造時における耐熱性等の観点から特にポリカーボネート樹脂またはシクロオレフィンポリマー（ＣＯＰ）が好ましく、第１の樹脂層１２ａと第２の樹脂層１２ｂの組合せとしては、ウレタン樹脂含有層とポリカーボネート樹脂を含有する層（ポリカーボネート樹脂含有層）との組み合わせ、またはウレタン樹脂含有層とシクロオレフィンポリマー（ＣＯＰ）を含有する層（シクロオレフィンポリマー（ＣＯＰ）含有層）との組み合わせがより好ましい。また、第２の樹脂層１２ｂの材料がポリカーボネート樹脂を含む場合、ポリカーボネート樹脂を含む第２の樹脂層１２ｂの厚さは、加工性の観点から０．５ｍｍ以上が好ましく、１ｍｍ以上がより好ましい。また、ポリカーボネート樹脂を含む第２の樹脂層１２ｂの厚さは、ミリ波の電波透過性の観点から５ｍｍ以下が好ましく、２ｍｍ以下がより好ましい。 In the present embodiment, of the first resin layer 12a and the second resin layer 12b constituting the radio wave transmitting member 12, the first resin layer 12a is provided on the side opposite to the first glass plate 11 side. The second resin layer 12b may have high radio wave transparency with respect to millimeter wave radio waves. As the material, for example, a polycarbonate resin, an acrylic resin, a cycloolefin polymer (COP), a fluororesin, a polyether terephthalate resin, or the like can be used. As the material of the second resin layer 12b, a polycarbonate resin or a cycloolefin polymer (COP) is particularly preferable from the viewpoint of heat resistance during production, and a combination of the first resin layer 12a and the second resin layer 12b As a combination of a urethane resin-containing layer and a polycarbonate resin-containing layer (polycarbonate resin-containing layer), or a urethane resin-containing layer and a cycloolefin polymer (COP) -containing layer (cycloolefin polymer (COP) -containing layer). The combination with is more preferable. When the material of the second resin layer 12b contains a polycarbonate resin, the thickness of the second resin layer 12b containing the polycarbonate resin is preferably 0.5 mm or more, more preferably 1 mm or more, from the viewpoint of processability. The thickness of the second resin layer 12b containing the polycarbonate resin is preferably 5 mm or less, more preferably 2 mm or less, from the viewpoint of radio wave transmission of millimeter waves.

なお、図１（ｃ）や図２（ｃ）では、第２の樹脂層１２ｂ、２２ｂは、第２ガラス板１３、２３と、主表面側（第１ガラス板と反対側の主表面側）が凹凸なく滑らかにつながっている。しかし、第２の樹脂層１２ｂ、２２ｂが第１ガラス板側に凹むようにして、第２の樹脂層１２ｂ、２２ｂの主表面と、第２ガラス板１３の端面とで凹部を形成してもよいし、第１ガラス板側とは反対側に突き出るようにして凸部を形成してもよい。 In addition, in FIG. 1C and FIG. 2C, the second resin layers 12b and 22b are the second glass plates 13 and 23 and the main surface side (the main surface side opposite to the first glass plate). Are connected smoothly without unevenness. However, the second resin layers 12b and 22b may be recessed toward the first glass plate, and the recess may be formed by the main surface of the second resin layers 12b and 22b and the end surface of the second glass plate 13. , The convex portion may be formed so as to protrude to the side opposite to the first glass plate side.

なお、図１（ａ）に例示する構成において窓部材１０は平面視で台形の領域をなす電波透過部材１２を備えるが、電波透過部材１２の形状や数はこの構成に限定されない。例えば、電波透過部材１２は円形等でもよく、また、電波透過部材１２の領域は複数あってもよい。すなわち、窓部材１０は複数の第１の領域Ａを備えてもよい。電波透過部材１２の形状は任意であるが、電波透過部材１２の厚さは、取り扱いの観点から０．３ｍｍ以上が好ましく、０．５ｍｍ以上がより好ましく、１．０ｍｍ以上がさらに好ましい。また、軽量性の観点から電波透過部材１２の厚さは、２．３ｍｍ以下が好ましく、２．０ｍｍ以下がより好ましい。 In the configuration illustrated in FIG. 1A, the window member 10 includes a radio wave transmitting member 12 forming a trapezoidal region in a plan view, but the shape and number of the radio wave transmitting members 12 are not limited to this configuration. For example, the radio wave transmitting member 12 may be circular or the like, and the radio wave transmitting member 12 may have a plurality of regions. That is, the window member 10 may include a plurality of first regions A. The shape of the radio wave transmitting member 12 is arbitrary, but the thickness of the radio wave transmitting member 12 is preferably 0.3 mm or more, more preferably 0.5 mm or more, still more preferably 1.0 mm or more from the viewpoint of handling. Further, from the viewpoint of light weight, the thickness of the radio wave transmitting member 12 is preferably 2.3 mm or less, more preferably 2.0 mm or less.

本実施形態では、第２の領域Ｂにおいて、第２ガラス板１３は、透明樹脂層１４を介して第１ガラス板１１に接合される。
透明樹脂層１４としては、従来自動車の窓ガラスとして用いられている合わせガラスに一般的に採用されているものを使用でき、例えば、ポリビニルブチラール樹脂、エチレンビニールアセテート樹脂、シクロオレフィンポリマー等を使用できる。透明樹脂層１４は、これらを単独で用いてもよく、組み合わせて用いてもよい。すなわち、透明樹脂層１４としては、ポリビニルブチラール樹脂、エチレンビニールアセテート樹脂、シクロオレフィンポリマーからなる群より選ばれる少なくとも１種を含有する樹脂の層を使用できる。なかでも透明樹脂層１４は、ポリビニルブチラール樹脂を含有することが好ましい。また、透明樹脂層は加熱前において液状の樹脂を用いてもよい。 In the present embodiment, in the second region B, the second glass plate 13 is joined to the first glass plate 11 via the transparent resin layer 14.
As the transparent resin layer 14, those generally used for laminated glass conventionally used as window glass of automobiles can be used, and for example, polyvinyl butyral resin, ethylene vinyl acetate resin, cycloolefin polymer and the like can be used. .. The transparent resin layer 14 may be used alone or in combination. That is, as the transparent resin layer 14, a resin layer containing at least one selected from the group consisting of polyvinyl butyral resin, ethylene vinyl acetate resin, and cycloolefin polymer can be used. Among them, the transparent resin layer 14 preferably contains a polyvinyl butyral resin. Further, as the transparent resin layer, a liquid resin may be used before heating.

そして、第１ガラス板１１、透明樹脂層１４、第２ガラス板１３及び電波透過部材１２を積層し、加熱及び加圧する工程を経ることで、第１の領域Ａにおいて、電波透過部材１２が第１ガラス板１１に接合され、かつ第２の領域Ｂにおいて、第１ガラス板１１と第２ガラス板１３とが透明樹脂層１４を介して接合された構成の窓部材１０が得られる。
なお、図１（ｂ）に示す構成において窓部材１０は透明樹脂層１４を１層のみ備えるが、本実施形態の窓部材１０は、上記例示した２種以上の樹脂により複数層の透明樹脂層を備えてもよい。 Then, by laminating the first glass plate 11, the transparent resin layer 14, the second glass plate 13, and the radio wave transmitting member 12, and then heating and pressurizing the first glass plate 11, the radio wave transmitting member 12 becomes the first in the first region A. A window member 10 having a structure in which the first glass plate 11 and the second glass plate 13 are joined via a transparent resin layer 14 can be obtained in the second region B, which is joined to one glass plate 11.
In the configuration shown in FIG. 1B, the window member 10 includes only one transparent resin layer 14, but the window member 10 of the present embodiment has a plurality of transparent resin layers made of two or more kinds of resins exemplified above. May be provided.

なお、第１ガラス板１１と、電波透過部材１２との線膨張係数の差が大きいと、上述の加熱の工程を経る場合に、窓部材１０に割れや反りが生じ、外観不良を引き起こすおそれがある。したがって、第１ガラス板の線膨張係数と、電波透過部材の線膨張係数との差は、できるだけ小さい方が好ましい。第１ガラス板と電波透過部材との線膨張係数の差は、各々、所定の温度範囲における平均線膨張係数どうしの差で示してもよい。特に、電波透過部材を構成する樹脂層は、ガラス転移点が低いので、樹脂材料のガラス転移点以下の温度範囲で、所定の平均線膨張係数差を設定してもよい。なお、第１ガラス板と樹脂材料との線膨張係数の差は、樹脂材料のガラス転移点以下の、所定の温度により、設定してもよい。 If the difference in linear expansion coefficient between the first glass plate 11 and the radio wave transmitting member 12 is large, the window member 10 may be cracked or warped when the above-mentioned heating process is performed, which may cause an appearance defect. be. Therefore, it is preferable that the difference between the coefficient of linear expansion of the first glass plate and the coefficient of linear expansion of the radio wave transmitting member is as small as possible. The difference in the coefficient of linear expansion between the first glass plate and the radio wave transmitting member may be indicated by the difference between the average coefficient of linear expansion in a predetermined temperature range. In particular, since the resin layer constituting the radio wave transmitting member has a low glass transition point, a predetermined average linear expansion coefficient difference may be set in a temperature range equal to or lower than the glass transition point of the resin material. The difference in the coefficient of linear expansion between the first glass plate and the resin material may be set at a predetermined temperature below the glass transition point of the resin material.

また、透明樹脂層１４は、粘着剤を含む粘着剤層を用いてもよく、粘着剤としては特に限定されないが、例えばアクリル系粘着剤やシリコーン系粘着剤等を使用できる。
透明樹脂層１４が粘着剤層である場合、第１ガラス板１１と、第２ガラス板１３及び電波透過部材１２との接合のプロセスにおいて加熱工程を経る必要がないため、上記の割れや反りが生じるおそれが無い。透明樹脂層１４の厚さは、０．１ｍｍ〜１ｍｍ程度であればよい。また、第２ガラス板１３の厚さは、取り扱いの観点から０．３ｍｍ以上が好ましく、０．５ｍｍ以上がより好ましく、１．０ｍｍ以上がさらに好ましい。また、軽量性の観点から２．３ｍｍ以下が好ましく、２．０ｍｍ以下がより好ましい。 Further, the transparent resin layer 14 may use a pressure-sensitive adhesive layer containing a pressure-sensitive adhesive, and the pressure-sensitive adhesive is not particularly limited, but for example, an acrylic pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, or the like can be used.
When the transparent resin layer 14 is an adhesive layer, it is not necessary to go through a heating step in the process of joining the first glass plate 11, the second glass plate 13, and the radio wave transmitting member 12, so that the above cracks and warpage occur. There is no risk of it occurring. The thickness of the transparent resin layer 14 may be about 0.1 mm to 1 mm. The thickness of the second glass plate 13 is preferably 0.3 mm or more, more preferably 0.5 mm or more, and even more preferably 1.0 mm or more from the viewpoint of handling. Further, from the viewpoint of light weight, 2.3 mm or less is preferable, and 2.0 mm or less is more preferable.

本実施形態の窓部材１０は、第１ガラス板１１、電波透過部材１２、第２ガラス板１３、透明樹脂層１４以外の層（以下「その他の層」ともいう）を本発明の効果を損なわない範囲で備えてもよい。例えば、撥水機能、親水機能、防曇機能等を付与するコーティング層や、赤外線反射膜等を備えてもよい。その他の層の設けられる位置は特に限定されず、窓部材１０の表面に設けられてもよく、複数の透明樹脂層１４に挟持されるように設けられてもよい。また、本実施形態の窓部材１０は、枠体等への取り付け部分や配線導体等を隠蔽する目的で、周縁部の一部または全部に帯状に配設される黒色セラミックス層等を備えてもよい。 In the window member 10 of the present embodiment, layers other than the first glass plate 11, the radio wave transmitting member 12, the second glass plate 13, and the transparent resin layer 14 (hereinafter, also referred to as “other layers”) impair the effect of the present invention. It may be provided within a range that does not exist. For example, a coating layer that imparts a water-repellent function, a hydrophilic function, an anti-fog function, or the like, an infrared reflective film, or the like may be provided. The position where the other layers are provided is not particularly limited, and may be provided on the surface of the window member 10 or may be provided so as to be sandwiched between the plurality of transparent resin layers 14. Further, the window member 10 of the present embodiment may be provided with a black ceramic layer or the like arranged in a band shape on a part or all of the peripheral edge portion for the purpose of concealing the attachment portion to the frame body or the like or the wiring conductor or the like. good.

（透湿防止材）
本実施形態において、電波透過部材１２を構成する樹脂層から外気（大気）中の水分が浸透することにより、湿度に対する耐候性が悪化するのを抑制するため、電波透過部材１２を構成する樹脂層が露出しないように透湿防止材１６が設けられている。具体的には、図１（ｃ）に示すように、透湿防止材１６が、電波透過部材１２（第２の樹脂層１２ｂ）の第１ガラス板１１側とは反対側の主表面１７上、及び第１の領域Ａと第２の領域Ｂの境界部１５上に設けられている。
以下具体的に、図１（ｃ）に示すように、第１の領域Ａの外縁が第１ガラス板１１の外縁よりも内側にある場合と、図２（ｃ）に示すように、第１の領域Ａの外縁の一部が第１ガラス板１１の外縁の一部を共有する（重複する）場合とで分けて説明する。 (Moisture prevention material)
In the present embodiment, the resin layer constituting the radio wave transmitting member 12 is prevented from deteriorating the weather resistance to humidity due to the permeation of moisture in the outside air (atmosphere) from the resin layer constituting the radio wave transmitting member 12. A moisture permeation preventive material 16 is provided so that the material is not exposed. Specifically, as shown in FIG. 1C, the moisture permeation preventive material 16 is placed on the main surface 17 of the radio wave transmitting member 12 (second resin layer 12b) on the side opposite to the first glass plate 11 side. , And are provided on the boundary portion 15 of the first region A and the second region B.
Specifically, as shown in FIG. 1 (c), the outer edge of the first region A is inside the outer edge of the first glass plate 11, and as shown in FIG. 2 (c), the first The case where a part of the outer edge of the region A shares (overlaps) a part of the outer edge of the first glass plate 11 will be described separately.

第１の領域Ａの外縁が第１ガラス板１１の外縁よりも内側にある場合は、図１（ｃ）に示すように、（図１（ｂ）に示す）境界部１５が電波透過部材１２の端面に沿って存在することになる。この場合、透湿防止材１６は、図１（ｃ）に示すように、第２の樹脂層１２ｂの主表面１７、及び境界部１５を覆うように設けられる。第２の樹脂層１２ｂの主表面１７上に透湿防止材１６が覆うように設けられることにより、第２の樹脂層１２ｂの主表面１７が露出されず、第２の樹脂層１２ｂの主表面から樹脂層内部に外気（大気）中の水分が浸透するのを抑制できる。また、境界部１５に隙間が生じている場合、透湿防止材１６が主表面１７から第２ガラス板１３の表面まで連続して該隙間を覆うように、または該隙間を埋めるように設けられることにより、第１の樹脂層１２ａ及び第２の樹脂層１２ｂの端面１８が露出されず、端面１８から樹脂層１２ａ，１２ｂ内部に外気（大気）中の水分が浸透するのを抑制できる。なお、透湿防止材１６が境界部１５を覆うように設けられる場合、透湿防止材１６の一部が第２ガラス板１３の主表面の一部を覆っていてもよいし、覆っていなくてもよい。なお、境界部１５に隙間が生じている場合とは、樹脂層１２ａ，１２ｂが透明樹脂層１４および第２ガラス板１３との粘着性によって密着しない材料を用いる場合等に発生し得る。 When the outer edge of the first region A is inside the outer edge of the first glass plate 11, the boundary portion 15 (shown in FIG. 1 (b)) is the radio wave transmitting member 12 as shown in FIG. 1 (c). Will exist along the end face of. In this case, as shown in FIG. 1C, the moisture permeation preventive material 16 is provided so as to cover the main surface 17 and the boundary portion 15 of the second resin layer 12b. By providing the moisture permeation preventive material 16 on the main surface 17 of the second resin layer 12b, the main surface 17 of the second resin layer 12b is not exposed, and the main surface of the second resin layer 12b is not exposed. It is possible to suppress the permeation of moisture in the outside air (atmosphere) into the resin layer. When a gap is formed at the boundary portion 15, the moisture permeation preventive material 16 is provided so as to continuously cover the gap from the main surface 17 to the surface of the second glass plate 13 or to fill the gap. As a result, the end faces 18 of the first resin layer 12a and the second resin layer 12b are not exposed, and it is possible to suppress the permeation of moisture in the outside air (atmosphere) from the end faces 18 into the resin layers 12a and 12b. When the moisture permeation preventive material 16 is provided so as to cover the boundary portion 15, a part of the moisture permeation preventive material 16 may or may not cover a part of the main surface of the second glass plate 13. You may. The case where a gap is formed in the boundary portion 15 may occur when a material in which the resin layers 12a and 12b do not adhere to the transparent resin layer 14 and the second glass plate 13 due to adhesiveness is used.

第１の領域Ａの外縁の一部が第１ガラス板の外縁の一部を共有する（重複する）場合は、図２（ｃ）に示すように、境界部２５が電波透過部材２２の一部の端面２８ｂ、つまり、第１ガラス板２１の外縁と共有（重複）しない外縁（透明樹脂層２４および第２ガラス板２３と隣り合う外縁）に相当する端面に存在することになる。この場合、透湿防止材２６は、図２（ｃ）に示すように、第２の樹脂層２２ｂの主表面２７、（図２（ｂ）に示す）境界部２５、第２ガラス板２３側とは反対側の端面２８ａを覆うように設けられる。第２の樹脂層２２ｂの主表面２７上および端面２８ａ上に透湿防止材２６が覆うように設けられることにより、第２の樹脂層２２ｂの主表面２７、第１の樹脂層２２ａ及び第２の樹脂層２２ｂの端面２８ａが露出されず、主表面２７及び端面２８ａから樹脂層２２ａ，２２ｂ内部に外気（大気）中の水分が浸透するのを抑制できる。 When a part of the outer edge of the first region A shares (overlaps) a part of the outer edge of the first glass plate, the boundary portion 25 is one of the radio wave transmitting members 22 as shown in FIG. 2C. The portion is present on the end face 28b, that is, the end face corresponding to the outer edge (the outer edge adjacent to the transparent resin layer 24 and the second glass plate 23) that is not shared (overlapping) with the outer edge of the first glass plate 21. In this case, as shown in FIG. 2C, the moisture permeation preventive material 26 is the main surface 27 of the second resin layer 22b, the boundary portion 25 (shown in FIG. 2B), and the second glass plate 23 side. It is provided so as to cover the end face 28a on the opposite side to the above. By providing the moisture permeation preventive material 26 on the main surface 27 and the end surface 28a of the second resin layer 22b so as to cover the main surface 27, the first resin layer 22a and the second resin layer 22b of the second resin layer 22b. The end face 28a of the resin layer 22b is not exposed, and it is possible to suppress the permeation of moisture in the outside air (atmosphere) from the main surface 27 and the end face 28a into the resin layers 22a and 22b.

また、境界部２５に隙間が生じている場合、透湿防止材２６が主表面２７から第２ガラス板２３の表面まで連続して該隙間を覆うように、または該隙間を埋めるように設けられることにより、端面２８ｂが露出されず、端面２８ｂから樹脂層２２ａ，２２ｂ内部に外気（大気）中の水分が浸透するのを抑制できる。なお、透湿防止材２６が境界部２５を覆うように設けられる場合、透湿防止材２６の一部が第２ガラス板２３の主表面の一部を覆っていてもよいし、覆っていなくてもよい。また、透湿防止材２６が端面２８ａを覆うように設けられる場合、透湿防止材２６の一部が第１ガラス板２１の端面の一部を覆っていてもよいし、覆っていなくてもよい。 When a gap is formed in the boundary portion 25, the moisture permeation preventive material 26 is provided so as to continuously cover the gap from the main surface 27 to the surface of the second glass plate 23 or to fill the gap. As a result, the end face 28b is not exposed, and it is possible to suppress the permeation of moisture in the outside air (atmosphere) from the end face 28b into the resin layers 22a and 22b. When the moisture permeation preventive material 26 is provided so as to cover the boundary portion 25, a part of the moisture permeation preventive material 26 may or may not cover a part of the main surface of the second glass plate 23. You may. When the moisture permeation preventive material 26 is provided so as to cover the end face 28a, a part of the moisture permeation preventive material 26 may or may not cover a part of the end face of the first glass plate 21. good.

なお、図１（ｃ）や図２（ｃ）では、第２の樹脂層１２ｂ、２２ｂは、第２ガラス板１３、２３と、主表面側（第１ガラス板と反対側の主表面側）が凹凸なく滑らかにつながっているが、第２の樹脂層１２ｂ、２２ｂが第１ガラス板側に凹むようにして、第２の樹脂層１２ｂ、２２ｂの主表面と第２ガラス板２３の端面とで凹部を形成してもよいし、第１ガラス板側とは反対側に突き出るようにして凸部を形成してもよい。第２の樹脂層１２ｂ、２２ｂが凹部を形成する場合に、透湿防止材１６、２６が境界部１５、２５を覆う場合は、透湿防止材１６、２６の一部が第２ガラス板の端面の一部を覆っていてもよい。また、第２の樹脂層１２ｂ、２２ｂが凸部を形成する場合に、透湿防止材１６、２６が境界部１５、２５を覆う場合は、第２の樹脂層１２ｂ、２２ｂの端面の一部を覆っていてもよい。 In addition, in FIG. 1C and FIG. 2C, the second resin layers 12b and 22b are the second glass plates 13 and 23 and the main surface side (the main surface side opposite to the first glass plate). The second resin layers 12b and 22b are recessed toward the first glass plate, and the main surface of the second resin layers 12b and 22b and the end surface of the second glass plate 23 are recessed. Or a convex portion may be formed so as to protrude to the side opposite to the first glass plate side. When the second resin layers 12b and 22b form recesses and the moisture permeation preventive materials 16 and 26 cover the boundary portions 15 and 25, a part of the moisture permeation preventive materials 16 and 26 is formed of the second glass plate. It may cover a part of the end face. When the second resin layers 12b and 22b form convex portions and the moisture permeation preventive materials 16 and 26 cover the boundary portions 15 and 25, a part of the end faces of the second resin layers 12b and 22b. May be covered.

本実施形態において、透湿防止材とは、ＪＩＳ Ｚ０２０８：１９７６に準拠して測定した温度４０℃、湿度９０％ＲＨにおける透湿度が０．５（ｇ／ｍ２・ｄａｙ）以下であるものを意味する。透湿度が０．５（ｇ／ｍ２・ｄａｙ）以下であることによって、電波透過部材を構成する樹脂層に水分が吸収され、湿度に対する耐候性が悪化するのを抑制できる。また、透湿度は０．４（ｇ／ｍ２・ｄａｙ）以下が好ましく、０．１（ｇ／ｍ２・ｄａｙ）以下がより好ましく、０．０１（ｇ／ｍ２・ｄａｙ）以下がさらに好ましい。 In the present embodiment, the moisture permeation preventive material is a material having a moisture permeation of 0.5 (g / m 2 · day) or less at a temperature of 40 ° C. and a humidity of 90% RH measured in accordance with JIS Z0208: 1976. means. When the moisture permeability is 0.5 (g / m 2 · day) or less, it is possible to prevent the resin layer constituting the radio wave transmitting member from absorbing moisture and deteriorating the weather resistance to humidity. The moisture permeability is preferably 0.4 (g / m 2 · day) or less, more preferably 0.1 (g / m 2 · day) or less, and further preferably 0.01 (g / m 2 · day) or less. preferable.

透湿防止材は透明でも透明でなくてもよい。ただし、第１ガラス板側とは反対側の主表面に設ける透湿防止材は、視認性の観点から透明であることが好ましい。 The moisture permeation inhibitor may or may not be transparent. However, the moisture permeation preventive material provided on the main surface opposite to the first glass plate side is preferably transparent from the viewpoint of visibility.

透湿防止材１６は、例えば、コーティング材またはシール材であってよい。
コーティング材は、樹脂層の第１ガラス板１１側と反対側の表面が露出しないように設ける場合に好適に用いられる。すなわち、図１（ｃ）における第２の樹脂層１２ｂ等の樹脂層の主表面１７を覆うように設ける場合に好適に用いられる。
コーティング材としては、例えば、ＳｉＯ２、ポリブチレン、エポキシ樹脂、アクリル樹脂、シリコーン、ポリイミド、ビニルアルコール、及びシクロオレフィンポリマー等を含むことが好ましい。コーティング材はこれらを単独で用いてもよく、組み合わせて含んでいてもよい。すなわち、コーティング材は、ＳｉＯ２、ポリブチレン、エポキシ樹脂、アクリル樹脂、シリコーン、ポリイミド、ビニルアルコール、及びシクロオレフィンポリマーからなる群より選ばれる少なくとも１種を含有することが好ましい。
コーティング材は、上記成分を含有するコーティング材組成物を塗布することにより形成できる。塗布方法としては、スピンコート、ディップコート、スプレーコート、ポッティング、スキージコート、スパッタリング、真空蒸着、ＣＶＤを例示できる。 The moisture permeation preventive material 16 may be, for example, a coating material or a sealing material.
The coating material is preferably used when the surface of the resin layer opposite to the first glass plate 11 side is provided so as not to be exposed. That is, it is preferably used when it is provided so as to cover the main surface 17 of the resin layer such as the second resin layer 12b in FIG. 1 (c).
The coating material preferably contains, for example, SiO 2 , polybutylene, epoxy resin, acrylic resin, silicone, polyimide, vinyl alcohol, cycloolefin polymer and the like. The coating material may be used alone or may be included in combination. That is, the coating material preferably contains at least one selected from the group consisting of SiO 2 , polybutylene, epoxy resin, acrylic resin, silicone, polyimide, vinyl alcohol, and cycloolefin polymer.
The coating material can be formed by applying a coating material composition containing the above components. Examples of the coating method include spin coating, dip coating, spray coating, potting, squeegee coating, sputtering, vacuum deposition, and CVD.

シール材は、樹脂層の端面が露出しないように設ける場合に好適に用いられる。すなわち、図１（ｂ）における境界部１５を覆うように設け、境界部１５を封止する場合に好適に用いられる。
シール材としては、例えば、ポリブチレン、エポキシ樹脂、アクリル樹脂、シリコーン、ポリイミド、ビニルアルコール、及びシクロオレフィンポリマー等が挙げられる。シール材はこれらを単独で用いてもよく、組み合わせて用いてもよい。すなわち、ポリブチレン、エポキシ樹脂、アクリル樹脂、シリコーン、ポリイミド、ビニルアルコール、及びシクロオレフィンポリマーからなる群より選ばれる少なくとも１種を含有するシール材を使用できる。 The sealing material is preferably used when the end face of the resin layer is provided so as not to be exposed. That is, it is preferably provided when it is provided so as to cover the boundary portion 15 in FIG. 1 (b) and the boundary portion 15 is sealed.
Examples of the sealing material include polybutylene, epoxy resin, acrylic resin, silicone, polyimide, vinyl alcohol, cycloolefin polymer and the like. As the sealing material, these may be used alone or in combination. That is, a sealing material containing at least one selected from the group consisting of polybutylene, epoxy resin, acrylic resin, silicone, polyimide, vinyl alcohol, and cycloolefin polymer can be used.

本実施形態の窓部材は、第１ガラス板の厚さが１．１ｍｍ以上であり、平面視において電波透過部材を備える領域に、第１ガラス板の主表面に対して６７．５°の入射角で入射する周波数Ｆ（ＧＨｚ）の電波の透過率Ｔ（Ｆ）が、６０ＧＨｚ≦Ｆ≦１００ＧＨｚの範囲で下記式（１）を満足することが好ましい。なお、Ｔ（Ｆ）が１のとき、透過率は１００％に相当する。
Ｔ（Ｆ）＞−０．００６１×Ｆ＋０．９３８４ ・・・（１） In the window member of the present embodiment, the thickness of the first glass plate is 1.1 mm or more, and the area provided with the radio wave transmitting member in a plan view is incident at 67.5 ° with respect to the main surface of the first glass plate. It is preferable that the transmittance T (F) of the radio wave having the frequency F (GHz) incident at the angle satisfies the following equation (1) in the range of 60 GHz ≦ F ≦ 100 GHz. When T (F) is 1, the transmittance corresponds to 100%.
T (F)> -0.0061 x F + 0.9384 ... (1)

自動車の車内に備えられたミリ波レーダー等を用いて窓ガラス越しに外部と通信を行う際に、電波が、例えばフロントガラス面に対して入射する角度は、窓ガラスの構造や通信相手の位置、ミリ波レーダー進行方向の仰角等によって異なる。しかし、一般的な自動車について、水平面に対するフロントガラスの傾斜角度を鑑みたとき、ミリ波レーダーがフロントガラス面に入射する入射角として、６７．５°程度を一つの目安とした。つまり、本発明者らは、６７．５°の入射角で窓ガラス面に入射するミリ波の電波透過率Ｔ（Ｆ）が自動車の窓ガラスのミリ波透過性の指標として重要であり、６７．５°近傍の入射角についても、同様にミリ波透過性の評価をする上で有用であることを見出した。なお、該評価では、ミリ波レーダーが水平面と平行な方向に進行する条件としている。
本発明者らが上記知見をもとに更に検討を重ねた結果、上記の式（１）を満足するような窓部材が、特に自動車の窓ガラスに用いた場合において、数十ＧＨｚ〜１００ＧＨｚの周波数帯域の電波に対しても高い透過性を有することを見出した。 When communicating with the outside through the window glass using a millimeter-wave radar installed in the car, the angle at which the radio wave is incident on the windshield surface, for example, is the structure of the window glass and the position of the communication partner. , Milli-wave radar Depends on the elevation angle in the traveling direction. However, for a general automobile, when the inclination angle of the windshield with respect to the horizontal plane is taken into consideration, about 67.5 ° is set as a guideline as the incident angle at which the millimeter-wave radar is incident on the windshield surface. That is, the present inventors consider that the radio wave transmittance T (F) of the millimeter wave incident on the window glass surface at an incident angle of 67.5 ° is important as an index of the millimeter wave transmittance of the window glass of the automobile. It was found that the incident angle near 5.5 ° is also useful for evaluating the millimeter wave transmittance. In the evaluation, the condition is that the millimeter-wave radar travels in a direction parallel to the horizontal plane.
As a result of further studies by the present inventors based on the above findings, when a window member satisfying the above formula (1) is used for a window glass of an automobile, the frequency is several tens of GHz to 100 GHz. It has been found that it has high transparency even for radio waves in the frequency band.

なお、上記のとおり、本発明の実施形態に係る窓部材は特に自動車の窓ガラスとして有用であるが、用途は特に限定されず、例えば建築物の窓ガラス等として用いてもよい。 As described above, the window member according to the embodiment of the present invention is particularly useful as a window glass of an automobile, but its use is not particularly limited, and may be used, for example, as a window glass of a building.

また、電波透過性を更に良好にするために、本発明の実施形態に係る窓部材は、平面視において電波透過部材を備える領域に、第１ガラス板の主表面に対して６７．５°の入射角で入射する周波数Ｆ（ＧＨｚ）の電波の透過率Ｔ（Ｆ）が、６０ＧＨｚ≦Ｆ≦１００ＧＨｚの範囲で下記式（２）を満足することが好ましい。
Ｔ（Ｆ）＞−０．００６１×Ｆ＋０．９７８４ ・・・（２） Further, in order to further improve the radio wave transmittance, the window member according to the embodiment of the present invention has a region provided with the radio wave transmitting member in a plan view at 67.5 ° with respect to the main surface of the first glass plate. It is preferable that the transmittance T (F) of the radio wave having a frequency F (GHz) incident at the incident angle satisfies the following equation (2) in the range of 60 GHz ≦ F ≦ 100 GHz.
T (F)> -0.0061 x F + 0.9784 ... (2)

また、電波透過性を更に良好にするために、本発明の実施形態に係る窓部材は、平面視において電波透過部材を備える領域に、第１ガラス板の主表面に対して６７．５°の入射角で入射する周波数Ｆ（ＧＨｚ）の電波の透過率Ｔ（Ｆ）が、６０ＧＨｚ≦Ｆ≦１００ＧＨｚの範囲で下記式（３）を満足することが好ましい。
Ｔ（Ｆ）＞−０．００６１×Ｆ＋１．０１８４ ・・・（３） Further, in order to further improve the radio wave transmittance, the window member according to the embodiment of the present invention has a region provided with the radio wave transmitting member in a plan view at 67.5 ° with respect to the main surface of the first glass plate. It is preferable that the transmittance T (F) of the radio wave having a frequency F (GHz) incident at the incident angle satisfies the following equation (3) in the range of 60 GHz ≦ F ≦ 100 GHz.
T (F)> -0.0061 x F + 1.0184 ... (3)

また、電波透過性を更に良好にするために、本発明の実施形態に係る窓部材は、平面視において電波透過部材を備える領域に、第１ガラス板の主表面に対して６７．５°の入射角で入射する周波数Ｆ（ＧＨｚ）の電波の透過率Ｔ（Ｆ）が、６０ＧＨｚ≦Ｆ≦１００ＧＨｚの範囲で下記式（４）を満足することが好ましい。
Ｔ（Ｆ）＞−０．００６１×Ｆ＋１．０５５４ ・・・（４） Further, in order to further improve the radio wave transmittance, the window member according to the embodiment of the present invention has a region provided with the radio wave transmitting member in a plan view at 67.5 ° with respect to the main surface of the first glass plate. It is preferable that the transmittance T (F) of the radio wave having a frequency F (GHz) incident at the incident angle satisfies the following equation (4) in the range of 60 GHz ≦ F ≦ 100 GHz.
T (F)> -0.0061 x F + 1.0554 ... (4)

以下、図面を参照して、本実施形態の窓部材１０を自動車の窓ガラスとして用いる場合について説明する。
図３は、本実施形態の窓部材１０が自動車１００の前方に形成された開口部１１０に装着され、自動車の窓ガラスとして用いられた状態を表す概念図である。自動車の窓ガラスとして用いられる窓部材１０には、車両の走行安全を確保するための、情報デバイス等が収納されたハウジング（ケース）１２０が、車両内部側の表面に取り付けられている。このように、本発明の実施形態は、窓部材１０と、窓部材１０に取り付けるハウジング１２０と、を備える、ハウジング付窓部材を提供する。 Hereinafter, a case where the window member 10 of the present embodiment is used as a window glass of an automobile will be described with reference to the drawings.
FIG. 3 is a conceptual diagram showing a state in which the window member 10 of the present embodiment is attached to the opening 110 formed in front of the automobile 100 and used as a window glass of the automobile. A housing (case) 120 in which an information device or the like is housed is attached to the surface of the inside of the vehicle in order to ensure the running safety of the vehicle in the window member 10 used as the window glass of the automobile. As described above, the embodiment of the present invention provides a window member with a housing including the window member 10 and the housing 120 attached to the window member 10.

本発明の実施形態に係るハウジング付窓部材は、上記窓部材の第１の領域Ａを覆うようにハウジング１２０が第２の領域Ｂに設けられていることが好ましい。
また、ハウジング内に収納される情報デバイスは、カメラやレーダー等を用いて車両の前方に存在する前方車、歩行者、障害物等への追突、衝突防止やドライバーに危険を知らせるためのデバイスで、例えば情報受信デバイスおよび／又は情報送信デバイス等であり、ミリ波レーダー、ステレオカメラ、赤外線レーザー等が含まれ、信号の送受信を行う。当該「信号」とは、ミリ波、可視光、赤外光等を含む電磁波のことである。 In the window member with a housing according to the embodiment of the present invention, it is preferable that the housing 120 is provided in the second region B so as to cover the first region A of the window member.
In addition, the information device stored in the housing is a device that uses a camera, radar, etc. to collide with vehicles in front of the vehicle, pedestrians, obstacles, etc., prevent collisions, and notify the driver of danger. For example, an information receiving device and / or an information transmitting device, which includes a millimeter wave radar, a stereo camera, an infrared laser, and the like, and transmits and receives signals. The "signal" is an electromagnetic wave including millimeter waves, visible light, infrared light and the like.

図４は、図３におけるＳ部分の拡大図であり、本実施形態の窓部材１０にハウジング１２０が取り付けられている部分を示す斜視図である。ハウジング１２０には、情報デバイスとしてミリ波レーダー２０１およびステレオカメラ２０２が格納されている。図４に示すように、本実施形態の窓部材１０は、電波透過性に優れる領域である第１の領域Ａがミリ波レーダー２０１およびステレオカメラ２０２等の情報デバイスの周辺に位置するようにして用いられる。情報デバイスを格納したハウジング１２０は、通常バックミラー１５０よりも車外側、窓部材１０よりも車内側に取り付けられるが、他の部分に取り付けられてもよい。 FIG. 4 is an enlarged view of the S portion in FIG. 3, and is a perspective view showing a portion where the housing 120 is attached to the window member 10 of the present embodiment. A millimeter-wave radar 201 and a stereo camera 202 are housed in the housing 120 as information devices. As shown in FIG. 4, in the window member 10 of the present embodiment, the first region A, which is a region excellent in radio wave transmission, is located around an information device such as a millimeter wave radar 201 and a stereo camera 202. Used. The housing 120 that houses the information device is usually mounted on the outside of the vehicle than the rearview mirror 150 and on the inside of the vehicle than the window member 10, but may be mounted on other parts.

図５は、図４のＹ−Ｙ線を含み水平線と直交する方向における断面図である。窓部材１０は通常、第１ガラス板１１が車外側に配置されるが、第１ガラス板１１を車内側に配置してもよい。なお、前述のとおり、ミリ波レーダー２０１等の情報デバイスの通信に用いられる電波３００が第１ガラス板１１の主表面に対する入射角θは、６７．５°で評価できる。 FIG. 5 is a cross-sectional view in a direction orthogonal to the horizontal line including the YY line of FIG. In the window member 10, the first glass plate 11 is usually arranged on the outside of the vehicle, but the first glass plate 11 may be arranged on the inside of the vehicle. As described above, the incident angle θ of the radio wave 300 used for communication of an information device such as the millimeter wave radar 201 with respect to the main surface of the first glass plate 11 can be evaluated at 67.5 °.

［第２の実施形態］
図６は、第２の実施形態の窓部材３０の断面図である。図６では、第１の領域Ａの外縁は第１ガラス板３１の外縁よりも内側にある場合を示しているが、第１の領域Ａの外縁の一部が第１ガラス板３１の外縁の一部と共有（重複）する形態でもよい。
第２の実施形態の窓部材３０は、第１の実施形態の窓部材１０において、第１ガラス板３１と電波透過部材３２（第１の樹脂層３２ａ）との間に、第３の樹脂層（透明樹脂層）３２ｃを設けた実施形態である。すなわち、図６に示す第２の実施形態の窓部材３０は、第１の領域Ａにおいて、第１ガラス板３１、電波透過部材３２（第３の樹脂層（透明樹脂層）３２ｃ、第１の樹脂層３２ａ、第２の樹脂層３２ｂ）の順に積層された構造を有する。 [Second Embodiment]
FIG. 6 is a cross-sectional view of the window member 30 of the second embodiment. FIG. 6 shows a case where the outer edge of the first region A is inside the outer edge of the first glass plate 31, but a part of the outer edge of the first region A is the outer edge of the first glass plate 31. It may be shared (overlapping) with a part.
The window member 30 of the second embodiment is a third resin layer between the first glass plate 31 and the radio wave transmitting member 32 (first resin layer 32a) in the window member 10 of the first embodiment. It is an embodiment provided with (transparent resin layer) 32c. That is, in the window member 30 of the second embodiment shown in FIG. 6, in the first region A, the first glass plate 31, the radio wave transmitting member 32 (third resin layer (transparent resin layer) 32c, first It has a structure in which the resin layer 32a and the second resin layer 32b) are laminated in this order.

本実施形態では、第１の領域Ａに電波透過部材３２の一部として第３の樹脂層（透明樹脂層）３２ｃを有する点において第１の実施形態と異なる。なお、第１の領域Ａにおける第３の樹脂層（透明樹脂層）３２ｃと、第２の領域Ｂにおける透明樹脂層３４は同一の樹脂材料で構成されていても、異なる樹脂材料で構成されていてもよい。両者が同一の樹脂層で構成される場合、第１の領域Ａにおける第３の樹脂層（透明樹脂層）３２ｃと、第２の領域Ｂにおける透明樹脂層３４は、同一の層として構成されていてもよい。すなわち、透明樹脂層３４は、第１ガラス板３１の主表面と対向する全領域に、図６で図示したような、第１の領域Ａと第２の領域Ｂとの境界がなく一層の連続した透明樹脂層として備えている。本態様であれば、生産性が向上するとともに、外部からの衝撃に対する強度が増すため好ましい。
本実施形態における第１ガラス板３１、電波透過部材３２（第３の樹脂層（透明樹脂層）３２ｃ、第１の樹脂層３２ａ、第２の樹脂層３２ｂ）、第２ガラス板３３、透明樹脂層３４、その他の層、透湿防止材３６については、第１の実施形態について説明したものと同様である。 The present embodiment is different from the first embodiment in that the first region A has a third resin layer (transparent resin layer) 32c as a part of the radio wave transmitting member 32. The third resin layer (transparent resin layer) 32c in the first region A and the transparent resin layer 34 in the second region B are made of different resin materials even if they are made of the same resin material. You may. When both are composed of the same resin layer, the third resin layer (transparent resin layer) 32c in the first region A and the transparent resin layer 34 in the second region B are configured as the same layer. You may. That is, the transparent resin layer 34 has no boundary between the first region A and the second region B as shown in FIG. 6 and is continuous in the entire region facing the main surface of the first glass plate 31. It is provided as a transparent resin layer. This embodiment is preferable because the productivity is improved and the strength against an external impact is increased.
First glass plate 31, radio wave transmitting member 32 (third resin layer (transparent resin layer) 32c, first resin layer 32a, second resin layer 32b), second glass plate 33, transparent resin in the present embodiment. The layer 34, the other layers, and the moisture permeation preventive material 36 are the same as those described in the first embodiment.

［第３の実施形態］
図７は、第３の実施形態の窓部材４０の断面図である。図７では、第１の領域Ａの外縁は第１ガラス板４１の外縁よりも内側にある場合を示しているが、第１の領域Ａの外縁の一部が第１ガラス板４１の外縁の一部と共有（重複）する形態でもよい。
第３の実施形態の窓部材４０は、第２の実施形態の窓部材３０において、計３種の層の樹脂層からなる電波透過部材を、１層の樹脂層（電波透過部材）４２に置き換えた実施形態である。すなわち、図７に示す第３の実施形態の窓部材４０は、第１の領域Ａにおいて、第１ガラス板４１、樹脂層（電波透過部材）４２の順に積層された構造を有する。本実施形態では、第１の領域Ａにおける積層数が少ないので、ミリ波の電波透過性がより向上しやすい。
ここで、樹脂層（電波透過部材）４２は、第２の実施形態の窓部材３０における樹脂層のいずれでもよい。すなわち、第２の実施形態の窓部材３０において、第３の樹脂層（透明樹脂層）３２ｃと同様の樹脂層でもよく、第１ガラス板３１の主表面と接触する第１の樹脂層３２ａと同様の樹脂層でもよく、第１ガラス板３１側とは反対側に備えられる第２の樹脂層３２ｂと同様の樹脂層でもよい。この中でも、樹脂層（電波透過部材）４２が、第１実施形態で挙げた、１層または複数層（２〜５層）のウレタン樹脂層（ウレタン樹脂含有層）である場合、透明樹脂層４４および第２ガラス板４３との密着性や接着強度が向上する。そのため、境界部４５に隙間ができにくい点で好ましい。
また、本実施形態における第１ガラス板４１、第２ガラス板４３、透明樹脂層４４、その他の層についても、第２の実施形態について説明したものと同様である。 [Third Embodiment]
FIG. 7 is a cross-sectional view of the window member 40 of the third embodiment. FIG. 7 shows a case where the outer edge of the first region A is inside the outer edge of the first glass plate 41, but a part of the outer edge of the first region A is the outer edge of the first glass plate 41. It may be shared (overlapping) with a part.
In the window member 40 of the third embodiment, in the window member 30 of the second embodiment, the radio wave transmitting member composed of a total of three types of resin layers is replaced with one resin layer (radio wave transmitting member) 42. It is an embodiment. That is, the window member 40 of the third embodiment shown in FIG. 7 has a structure in which the first glass plate 41 and the resin layer (radio wave transmitting member) 42 are laminated in this order in the first region A. In the present embodiment, since the number of layers in the first region A is small, the radio wave transmission of millimeter waves is likely to be improved.
Here, the resin layer (radio wave transmitting member) 42 may be any of the resin layers in the window member 30 of the second embodiment. That is, in the window member 30 of the second embodiment, the same resin layer as the third resin layer (transparent resin layer) 32c may be used, and the first resin layer 32a in contact with the main surface of the first glass plate 31 A similar resin layer may be used, or a resin layer similar to the second resin layer 32b provided on the side opposite to the first glass plate 31 side may be used. Among these, when the resin layer (radio transmitting member) 42 is the one-layer or a plurality of layers (2 to 5 layers) of the urethane resin layer (urethane resin-containing layer) mentioned in the first embodiment, the transparent resin layer 44 And the adhesion and adhesive strength with the second glass plate 43 are improved. Therefore, it is preferable in that a gap is unlikely to be formed at the boundary portion 45.
Further, the first glass plate 41, the second glass plate 43, the transparent resin layer 44, and the other layers in the present embodiment are the same as those described in the second embodiment.

本実施形態においては、図７に示すように、第２ガラス板４３と樹脂層（電波透過部材）４２との間に凹部が形成されていてもよい。また、図７に示すものとは異なり、第２ガラス板４３と樹脂層（電波透過部材）４２との間に凸部が形成されていてもよいし、主表面側（第１ガラス板４１と反対側の主表面側）が凹凸なく滑らかにつながっていてもよい。第２ガラス板４３と樹脂層（電波透過部材）４２との間に凹部が形成される場合、透湿防止材４６は、樹脂層（電波透過部材）４２の第１ガラス板側とは反対側の主表面４７上に設けられ、また、第１の領域Ａと第２の領域Ｂとの境界部４５を覆うように設けられる。この場合、図７に示すように、透湿防止材４６の一部が第２ガラス板４３の端面の一部を覆っていてもよいし、覆っていなくてもよい。また、境界部４５のうち、第２ガラス板４３と樹脂層（電波透過部材）４２との間に隙間が生じている場合、透湿防止材４６は、該隙間を埋めるように設けられるようにすればよい。なお、樹脂層（電波透過部材）４２が、１層または複数層（２〜５層）のウレタン樹脂層（ウレタン樹脂含有層）である場合、境界部４５に隙間が生じないため、透湿防止材４６は、樹脂層（電波透過部材）４２の第１ガラス板側とは反対側の主表面４７上に設けられていればよい。 In the present embodiment, as shown in FIG. 7, a recess may be formed between the second glass plate 43 and the resin layer (radio wave transmitting member) 42. Further, unlike the one shown in FIG. 7, a convex portion may be formed between the second glass plate 43 and the resin layer (radio wave transmitting member) 42, or the main surface side (the first glass plate 41). The main surface side on the opposite side) may be smoothly connected without unevenness. When a recess is formed between the second glass plate 43 and the resin layer (radio wave transmitting member) 42, the moisture permeation preventing material 46 is on the side opposite to the first glass plate side of the resin layer (radio wave transmitting member) 42. It is provided on the main surface 47 of the above, and is provided so as to cover the boundary portion 45 between the first region A and the second region B. In this case, as shown in FIG. 7, a part of the moisture permeation preventive material 46 may or may not cover a part of the end face of the second glass plate 43. Further, when a gap is formed between the second glass plate 43 and the resin layer (radio wave transmitting member) 42 in the boundary portion 45, the moisture permeation preventing material 46 is provided so as to fill the gap. do it. When the resin layer (radio wave transmitting member) 42 is a one-layer or a plurality of layers (2 to 5 layers) of a urethane resin layer (urethane resin-containing layer), there is no gap at the boundary portion 45, so that moisture permeation is prevented. The material 46 may be provided on the main surface 47 of the resin layer (radio wave transmitting member) 42 on the side opposite to the first glass plate side.

［第４の実施形態］
図８は第４の実施形態の窓部材５０の断面図である。本実施形態の窓部材５０は、第１ガラス板５１の主表面と対向する全領域に電波透過部材５２を備える。図８において、電波透過部材５２は、第１ガラス板５１の主表面と接触する第１の樹脂層５２ａ、及び第１ガラス板５１側とは反対側に備えられる第２の樹脂層５２ｂの計２種の層から構成されている場合を例示している。すなわち、本実施形態は、第１の実施形態の窓部材１０において、第１の樹脂層１２ａおよび第２の樹脂層１２ｂを第１ガラス板１１の主表面と対向する全領域に備えるように置き換えた実施形態である。
電波透過部材５２は第１ガラス板５１に接合される。つまり、本実施形態の窓部材５０は、全領域にわたって、第１ガラス板５１、電波透過部材５２（第１の樹脂層５２ａ、第２の樹脂層５２ｂ）がこの順に積層された積層体である。 [Fourth Embodiment]
FIG. 8 is a cross-sectional view of the window member 50 of the fourth embodiment. The window member 50 of the present embodiment includes a radio wave transmitting member 52 in the entire region facing the main surface of the first glass plate 51. In FIG. 8, the radio wave transmitting member 52 is a total of a first resin layer 52a in contact with the main surface of the first glass plate 51 and a second resin layer 52b provided on the side opposite to the first glass plate 51 side. The case where it is composed of two kinds of layers is illustrated. That is, in the present embodiment, in the window member 10 of the first embodiment, the first resin layer 12a and the second resin layer 12b are replaced so as to be provided in the entire region facing the main surface of the first glass plate 11. It is an embodiment.
The radio wave transmitting member 52 is joined to the first glass plate 51. That is, the window member 50 of the present embodiment is a laminated body in which the first glass plate 51 and the radio wave transmitting member 52 (first resin layer 52a, second resin layer 52b) are laminated in this order over the entire region. ..

本実施形態の場合、透湿防止材５６は、図８に示すように、第２の樹脂層５２ｂの第１ガラス板側とは反対側の主表面５７、及び、第１の樹脂層５２ａ及び第２の樹脂層５２ｂの両端面５８（一方の端面のみ図示）を覆うように設けられる。第２の樹脂層５２ｂの主表面５７上、第１の樹脂層５２ａ及び第２の樹脂層５２ｂの両端面５８上に透湿防止材５６が覆うように設けられることにより、第２の樹脂層５２ｂの主表面５７、第１の樹脂層５２ａ及び第２の樹脂層５２ｂの両端面５８が露出されず、主表面５７及び両端面５８から外気（大気）中の水分が吸収されるのを抑制できる。 In the case of the present embodiment, as shown in FIG. 8, the moisture permeation preventive material 56 includes the main surface 57 of the second resin layer 52b on the side opposite to the first glass plate side, the first resin layer 52a, and the first resin layer 52a. It is provided so as to cover both end faces 58 (only one end face is shown) of the second resin layer 52b. The second resin layer is provided on the main surface 57 of the second resin layer 52b and on both end faces 58 of the first resin layer 52a and the second resin layer 52b so as to be covered with the moisture permeation preventive material 56. Both end faces 58 of the main surface 57, the first resin layer 52a, and the second resin layer 52b of 52b are not exposed, and the absorption of moisture in the outside air (atmosphere) from the main surface 57 and both end faces 58 is suppressed. can.

本実施形態における第１ガラス板５１、第１の樹脂層５２ａ、第２の樹脂層５２ｂ、その他の層、透湿防止材５６については、第１の実施形態について説明したものと同様である。 The first glass plate 51, the first resin layer 52a, the second resin layer 52b, the other layers, and the moisture permeation preventive material 56 in the present embodiment are the same as those described in the first embodiment.

［第５の実施形態］
図９は第５の実施形態の窓部材６０の断面図である。本実施形態の窓部材６０は、第１ガラス板６１の主表面と対向する全領域に電波透過部材６２を備える。図９において、電波透過部材６２は、第３の樹脂層（透明樹脂層）６２ｃ、第１の樹脂層６２ａおよび第２の樹脂層６２ｂの計３種の層から構成されている場合を例示している。本実施形態は、第１ガラス板６１と第１の樹脂層６２ａの間に第３の樹脂層（透明樹脂層）６２ｃを設けた実施形態である。すなわち、本実施形態の窓部材６０は、全領域にわたって、第１ガラス板６１、電波透過部材６２（第３の樹脂層（透明樹脂層）６２ｃ、第１の樹脂層６２ａ、第２の樹脂層６２ｂ）がこの順に積層された積層体である。第５の実施形態の窓部材６０は、第３の樹脂層（透明樹脂層）６２ｃを有することで、第４の実施形態の窓部材５０に比べ、外部からの衝撃に対する強度が増す。 [Fifth Embodiment]
FIG. 9 is a cross-sectional view of the window member 60 of the fifth embodiment. The window member 60 of the present embodiment includes a radio wave transmitting member 62 in the entire region facing the main surface of the first glass plate 61. FIG. 9 illustrates a case where the radio wave transmitting member 62 is composed of a third resin layer (transparent resin layer) 62c, a first resin layer 62a, and a second resin layer 62b, for a total of three types of layers. ing. This embodiment is an embodiment in which a third resin layer (transparent resin layer) 62c is provided between the first glass plate 61 and the first resin layer 62a. That is, in the window member 60 of the present embodiment, the first glass plate 61, the radio wave transmitting member 62 (third resin layer (transparent resin layer) 62c, first resin layer 62a, second resin layer) cover the entire area. 62b) is a laminated body laminated in this order. Since the window member 60 of the fifth embodiment has the third resin layer (transparent resin layer) 62c, the strength against an external impact is increased as compared with the window member 50 of the fourth embodiment.

本実施形態の場合、透湿防止材６６は、図９に示すように、第２の樹脂層６２ｂの第１ガラス板側とは反対側の主表面６７、ないし、第３の樹脂層（透明樹脂層）６２ｃ、第１の樹脂層６２ａ、及び第２の樹脂層６２ｂの両端面６８（一方の端面のみ図示）を覆うように設けられる。第２の樹脂層６２ｂの主表面６７上、ないし、第３の樹脂層（透明樹脂層）６２ｃ、第１の樹脂層６２ａ及び第２の樹脂層６２ｂの両端面６８上に透湿防止材６６が覆うように設けられることにより、第２の樹脂層６２ｂの主表面６７、ないし、第３の樹脂層（透明樹脂層）６２ｃ、第１の樹脂層６２ａ及び第２の樹脂層６２ｂの両端面６８が露出されず、主表面６７及び両端面６８から外気（大気）中水分が吸収されるのを抑制できる。 In the case of the present embodiment, as shown in FIG. 9, the moisture permeation preventive material 66 has a main surface 67 on the side of the second resin layer 62b opposite to the first glass plate side, or a third resin layer (transparent). The resin layer) 62c, the first resin layer 62a, and the second resin layer 62b are provided so as to cover both end faces 68 (only one end face is shown). Moisture permeable material 66 on the main surface 67 of the second resin layer 62b, or on both end faces 68 of the third resin layer (transparent resin layer) 62c, the first resin layer 62a, and the second resin layer 62b. The main surface 67 of the second resin layer 62b, or both end faces of the third resin layer (transparent resin layer) 62c, the first resin layer 62a, and the second resin layer 62b. The 68 is not exposed, and the absorption of moisture in the outside air (atmosphere) from the main surface 67 and both end faces 68 can be suppressed.

本実施形態における第１ガラス板４１、第３の樹脂層（透明樹脂層）６２ｃ、第１の樹脂層６２ａ、第２の樹脂層６２ｂ、その他の層、透湿防止材６６については、第１の実施形態について説明したものと同様である。 The first glass plate 41, the third resin layer (transparent resin layer) 62c, the first resin layer 62a, the second resin layer 62b, the other layers, and the moisture permeation preventive material 66 in the present embodiment are the first. Is the same as that described for the embodiment of.

以下に、実施例を挙げて本発明を具体的に説明するが、本発明はこれに限定されない。 Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.

［ガラス板の製造］
＜組成例１のガラス板の製造＞
まず、下記に示すガラス組成（単位：モル％）となるように、白金坩堝に原料を投入し、１５５０℃で２時間溶融した後、カーボン板上に溶融液を流し出して徐冷し、組成例１のガラス板を得た。得られた板の両面を研磨し、所定の寸法のガラス板を得た。なお、組成例１のガラスは、従来自動車の窓部材として用いられている合わせガラスに使用されているガラスである。組成例１のガラスは、前述の組成Ａに該当するガラスである。
＜組成例１のガラス＞
ＳｉＯ２：６９．７％、
Ａｌ２Ｏ３：０．９％、
ＭｇＯ：７％、
ＣａＯ：９％、
ＴｉＯ２：０．０５％、
Ｎａ２Ｏ：１２．６％、
Ｋ２Ｏ：０．６％、
Ｆｅ２Ｏ３：０．２％ [Manufacturing of glass plates]
<Manufacturing of glass plate of composition example 1>
First, the raw material was put into a platinum crucible so as to have the glass composition (unit: mol%) shown below, melted at 1550 ° C. for 2 hours, and then the molten liquid was poured onto a carbon plate to slowly cool the composition. The glass plate of Example 1 was obtained. Both sides of the obtained plate were polished to obtain a glass plate having a predetermined size. The glass of Composition Example 1 is a glass used for a laminated glass conventionally used as a window member of an automobile. The glass of Composition Example 1 is a glass corresponding to the above-mentioned composition A.
<Glass of Composition Example 1>
SiO 2 : 69.7%,
Al 2 O 3 : 0.9%,
MgO: 7%,
CaO: 9%,
TiO 2 : 0.05%,
Na 2 O: 12.6%,
K 2 O: 0.6%,
Fe 2 O 3 : 0.2%

［窓部材の製造］
＜例１（実施例１）＞
例１の窓部材は、図１（ｃ）に示す層構成を有する。第１ガラス板１１として、組成例１のガラス板（３００ｍｍ×３００ｍｍ、厚さ２ｍｍ）を、透明樹脂層１４としてポリビニルブチラール（ＰＶＢ）製フィルム（積水化学工業株式会社製、３００ｍｍ×３００ｍｍ、厚さ０．７６ｍｍ）を、第２ガラス板１３として、組成例１のガラス板（３００ｍｍ×３００ｍｍ、厚さ２ｍｍ）を用いた。第１ガラス板１１、透明樹脂層１４、第２ガラス板１３をこの順で積層し、真空包装器を用いて、真空化させた後、加熱（１２０℃，３０分）することで仮圧着をさせた。 [Manufacturing of window members]
<Example 1 (Example 1)>
The window member of Example 1 has the layer structure shown in FIG. 1 (c). As the first glass plate 11, the glass plate of Composition Example 1 (300 mm × 300 mm, thickness 2 mm) is used, and as the transparent resin layer 14, a polyvinyl butyral (PVB) film (manufactured by Sekisui Chemical Industry Co., Ltd., 300 mm × 300 mm, thickness) is used. 0.76 mm) was used as the second glass plate 13, and the glass plate of Composition Example 1 (300 mm × 300 mm, thickness 2 mm) was used. The first glass plate 11, the transparent resin layer 14, and the second glass plate 13 are laminated in this order, evacuated using a vacuum packaging device, and then heated (120 ° C., 30 minutes) for temporary crimping. I let you.

その後、第２ガラス板１３の平面視で、２１０ｍｍ×２９７ｍｍの領域（領域Ａに相当）において、第２ガラス板１３および透明樹脂層１４（ＰＶＢ）をくり貫いた。そして、この領域Ａに相当する部分に、第１の樹脂層１２ａとして２層構造のウレタン製の樹脂板（厚さ１．２７ｍｍ）を、第２の樹脂層１２ｂとしてポリカーボネート（ＰＣ）製の樹脂板（タキロンシーアイ株式会社製、２１０ｍｍ×２９７ｍｍ、厚さ０．５ｍｍ、１００℃における線膨張係数９×１０−６℃−１）を用いた。さらに、オートクレーブを用いて圧着処理（１ＭＰａ，１３０℃，３時間）を行った。その後、第２ガラス板１３と第２の樹脂層１２ｂとの境界部１５（窓部材の全外周端部に相当）上にブチルテープによりシールし、例１の窓部材を得た。上記ブチルテープのＪＩＳ Ｚ０２０８：１９７６に準拠して測定した温度４０℃、湿度９０％ＲＨにおける透湿度は０．５（ｇ／ｍ２・ｄａｙ）であった。 Then, in a plan view of the second glass plate 13, the second glass plate 13 and the transparent resin layer 14 (PVB) were hollowed out in a region of 210 mm × 297 mm (corresponding to the region A). Then, in the portion corresponding to this region A, a urethane resin plate (thickness 1.27 mm) having a two-layer structure is used as the first resin layer 12a, and a polycarbonate (PC) resin is used as the second resin layer 12b. A plate (manufactured by Takiron Co., Ltd., 210 mm × 297 mm, thickness 0.5 mm, linear expansion coefficient at 100 ° C. 9 × 10-6 ° C. -1 ) was used. Further, a crimping treatment (1 MPa, 130 ° C., 3 hours) was performed using an autoclave. Then, the boundary portion 15 (corresponding to the entire outer peripheral end portion of the window member) between the second glass plate 13 and the second resin layer 12b was sealed with butyl tape to obtain the window member of Example 1. The moisture permeability of the butyl tape at a temperature of 40 ° C. and a humidity of 90% RH measured in accordance with JIS Z0208: 1976 was 0.5 (g / m 2 · day).

＜例２（比較例１）＞
ブチルテープでシールしなかった点を除いては、例１と同様にして、例２の窓部材を得た。 <Example 2 (Comparative Example 1)>
A window member of Example 2 was obtained in the same manner as in Example 1 except that it was not sealed with butyl tape.

［窓部材の評価］
＜耐湿性試験＞
例１及び例２それぞれの窓部材について、温度４０℃、湿度９０％ＲＨで２４時間放置した。この結果、透湿防止材を設けた例１の窓部材においては樹脂の白濁がみられなかったが、透湿防止材を設けなかった例２の窓部材においては樹脂の白濁がみられた。
したがって、例１の窓部材は、湿度に対する耐候性に優れていることがわかった。 [Evaluation of window members]
<Moisture resistance test>
Each of the window members of Example 1 and Example 2 was left at a temperature of 40 ° C. and a humidity of 90% RH for 24 hours. As a result, no white turbidity of the resin was observed in the window member of Example 1 provided with the moisture permeation preventive material, but white turbidity of the resin was observed in the window member of Example 2 not provided with the moisture permeation preventive material.
Therefore, it was found that the window member of Example 1 was excellent in weather resistance to humidity.

＜電波透過率Ｔ（Ｆ）＞
例１の窓部材について、第２ガラス板１３と第２の樹脂層１２ｂ（ＰＣ）との境界部１５上のみにブチルテープによりシールし、第２の樹脂層１２ｂ（ＰＣ）の主表面はブチルテープでシールしない場合について電波透過率Ｔ（Ｆ）の検討をした。そして、このときの窓部材について、入射角が６７．５°で入射する周波数Ｆ（ＧＨｚ）の電波の透過率Ｔ（Ｆ）を、６０ＧＨｚ≦Ｆ（ＧＨｚ）≦１００ＧＨｚの範囲でシミュレーションにより算出した。その結果、上記周波数範囲において、透過率Ｔ（Ｆ）は、式（４）、即ち、Ｔ（Ｆ）＞−０．０６１×Ｆ＋１．０５５４を満たした。
したがって、例１の窓部材は、電波透過性に優れていることがわかった。 <Radio wave transmittance T (F)>
The window member of Example 1 is sealed with butyl tape only on the boundary portion 15 between the second glass plate 13 and the second resin layer 12b (PC), and the main surface of the second resin layer 12b (PC) is butyl. The radio wave transmittance T (F) was examined in the case of not sealing with tape. Then, for the window member at this time, the transmittance T (F) of the radio wave having a frequency F (GHz) incident at an incident angle of 67.5 ° was calculated by simulation in the range of 60 GHz ≤ F (GHz) ≤ 100 GHz. .. As a result, in the above frequency range, the transmittance T (F) satisfied the formula (4), that is, T (F)> −0.061 × F + 1.0554.
Therefore, it was found that the window member of Example 1 was excellent in radio wave transmission.

＜例３（実施例２）＞
第２の樹脂層１２ｂとして、ポリカーボネート（ＰＣ）製の樹脂板の代わりに、シクロオレフィンポリマー（ＣＯＰ）製の樹脂板（日本ゼオン株式会社製、２１０ｍｍ×２９７ｍｍ、厚さ２ｍｍ、１００℃における線膨張係数７０×１０−６℃−１）を用いた以外は、例１（実施例１）と同じ構成の窓部材を得た。 <Example 3 (Example 2)>
As the second resin layer 12b, instead of the resin plate made of polycarbonate (PC), a resin plate made of cycloolefin polymer (COP) (manufactured by Nippon Zeon Corporation, 210 mm × 297 mm, thickness 2 mm, linear expansion at 100 ° C.) A window member having the same configuration as that of Example 1 (Example 1) was obtained except that a coefficient of 70 × 10 -6 ° C- 1) was used.

［窓部材の評価］
＜耐湿性試験＞
例３の窓部材について、温度４０℃、湿度９０％ＲＨで２４時間放置した。この結果、透湿防止材を設けた例３の窓部材においては樹脂の白濁がみられなかった。 [Evaluation of window members]
<Moisture resistance test>
The window member of Example 3 was left at a temperature of 40 ° C. and a humidity of 90% RH for 24 hours. As a result, no white turbidity of the resin was observed in the window member of Example 3 provided with the moisture permeation preventive material.

＜電波透過率Ｔ（Ｆ）＞
例３の窓部材について、電波透過率Ｔ（Ｆ）の検討をした。そして、このときの窓部材について、入射角が６７．５°で入射する周波数Ｆ（ＧＨｚ）の電波の透過率Ｔ（Ｆ）を、６０ＧＨｚ≦Ｆ（ＧＨｚ）≦１００ＧＨｚの範囲でシミュレーションにより算出した。その結果、上記周波数範囲において、透過率Ｔ（Ｆ）は、式（３）、即ち、Ｔ（Ｆ）＞−０．０６１×Ｆ＋１．０１８４を満たした。 <Radio wave transmittance T (F)>
Regarding the window member of Example 3, the radio wave transmittance T (F) was examined. Then, for the window member at this time, the transmittance T (F) of the radio wave having a frequency F (GHz) incident at an incident angle of 67.5 ° was calculated by simulation in the range of 60 GHz ≤ F (GHz) ≤ 100 GHz. .. As a result, in the above frequency range, the transmittance T (F) satisfied the formula (3), that is, T (F)> −0.061 × F + 1.0184.

＜例４（実施例３）＞
ブチルテープを第２の樹脂層（ＰＣ）１２ｂの主表面１７上にも全てシールした以外は、例１（実施例１）と同じ構成の窓部材を得た。なお、ブチルテープの厚さは、１ｍｍとした。 <Example 4 (Example 3)>
A window member having the same configuration as that of Example 1 (Example 1) was obtained except that the butyl tape was completely sealed on the main surface 17 of the second resin layer (PC) 12b. The thickness of the butyl tape was 1 mm.

［窓部材の評価］
＜耐湿性試験＞
例４の窓部材について、温度４０℃、湿度９０％ＲＨで２４時間放置した。この結果、透湿防止材を設けた例４の窓部材においては樹脂の白濁がみられなかった。 [Evaluation of window members]
<Moisture resistance test>
The window member of Example 4 was left at a temperature of 40 ° C. and a humidity of 90% RH for 24 hours. As a result, no white turbidity of the resin was observed in the window member of Example 4 provided with the moisture permeation preventive material.

＜電波透過率Ｔ（Ｆ）＞
例４の窓部材について、電波透過率Ｔ（Ｆ）の検討をした。そして、このときの窓部材について、入射角が６７．５°で入射する周波数Ｆ（ＧＨｚ）の電波の透過率Ｔ（Ｆ）を、６０ＧＨｚ≦Ｆ（ＧＨｚ）≦１００ＧＨｚの範囲でシミュレーションにより算出した。その結果、上記周波数範囲において、透過率Ｔ（Ｆ）は、式（１）、即ち、Ｔ（Ｆ）＞−０．０６１×Ｆ＋０．９３８４を満たした。 <Radio wave transmittance T (F)>
Regarding the window member of Example 4, the radio wave transmittance T (F) was examined. Then, for the window member at this time, the transmittance T (F) of the radio wave having a frequency F (GHz) incident at an incident angle of 67.5 ° was calculated by simulation in the range of 60 GHz ≤ F (GHz) ≤ 100 GHz. .. As a result, in the above frequency range, the transmittance T (F) satisfied the formula (1), that is, T (F)> −0.061 × F + 0.9384.

１０、２０、３０、４０、５０、６０ 窓部材
１１、２１、３１、４１、５１、６１ 第１ガラス板
１２、２２、３２、４２、５２、６２ 電波透過部材
２２ａ、３２ａ、５２ａ、６２ａ 第１の樹脂層
２２ｂ、３２ｂ、５２ｂ、６２ｂ 第２の樹脂層
３２ｃ、６２ｃ 第３の樹脂層（透明樹脂層）
１３、２３、３３、４３ 第２ガラス板
１４、２４、３４、４４ 透明樹脂層
１５、２５、４５ 境界部
１６、２６、３６、４６、５６、６６ 透湿防止材
１７、２７、４７、５７、６７ 主表面
１８、２８ａ、２８ｂ、５８、６８ 端面
１００ 自動車
１１０ 開口部
１２０ ハウジング
１５０ バックミラー
２０１ ミリ波レーダー
２０２ ステレオカメラ
３００ 電波
Ａ 第１の領域
Ｂ 第２の領域 10, 20, 30, 40, 50, 60 Window members 11, 21, 31, 41, 51, 61 First glass plate 12, 22, 32, 42, 52, 62 Radio wave transmitting members 22a, 32a, 52a, 62a No. 1 resin layer 22b, 32b, 52b, 62b 2nd resin layer 32c, 62c 3rd resin layer (transparent resin layer)
13, 23, 33, 43 Second glass plate 14, 24, 34, 44 Transparent resin layer 15, 25, 45 Boundary 16, 26, 36, 46, 56, 66 Moisture permeable material 17, 27, 47, 57 , 67 Main surface 18, 28a, 28b, 58, 68 End face 100 Automobile 110 Opening 120 Housing 150 Rearview mirror 201 Millimeter wave radar 202 Stereo camera 300 Radio wave A First area B Second area

Claims (20)

第１ガラス板と、
前記第１ガラス板の主表面と対向する少なくとも一層の樹脂層を含む電波透過部材と、
前記樹脂層が露出しないように設けられた透湿防止材と、
を備え、
前記透湿防止材は、ＪＩＳ Ｚ０２０８：１９７６に準拠して測定した温度４０℃、湿度９０％ＲＨにおける透湿度が０．５（ｇ／ｍ２・ｄａｙ）以下である、
窓部材。 The first glass plate and
A radio wave transmitting member including at least one resin layer facing the main surface of the first glass plate, and
A moisture permeation preventive material provided so that the resin layer is not exposed,
With
The moisture permeation preventive material has a humidity permeation of 0.5 (g / m 2 · day) or less at a temperature of 40 ° C. and a humidity of 90% RH measured in accordance with JIS Z0208: 1976.
Window member. 前記透湿防止材は、少なくとも前記第１ガラス板側とは反対側の表面が露出している、請求項１に記載の窓部材。 The window member according to claim 1, wherein the moisture permeation preventive material has an exposed surface at least on the side opposite to the first glass plate side. 前記少なくとも一層の樹脂層は、ウレタン樹脂含有層を含む、請求項１または２に記載の窓部材。 The window member according to claim 1 or 2, wherein the at least one layer of the resin layer contains a urethane resin-containing layer. 前記ウレタン樹脂含有層は、前記電波透過部材の前記第１ガラス板側に備えられる、請求項３に記載の窓部材。 The window member according to claim 3, wherein the urethane resin-containing layer is provided on the first glass plate side of the radio wave transmitting member. 前記ウレタン樹脂含有層は、前記第１ガラス板と接触している、請求項４に記載の窓部材。 The window member according to claim 4, wherein the urethane resin-containing layer is in contact with the first glass plate. 前記少なくとも一層の樹脂層は、前記ウレタン樹脂含有層の前記第１ガラス板側とは反対側の表面に設けられた、ポリカーボネート樹脂、アクリル樹脂、シクロオレフィンポリマー、フッ素樹脂、及びポリエーテルテレフタレート樹脂から選ばれる少なくとも１つの樹脂を含有する樹脂層を含む、請求項３〜５のいずれか１項に記載の窓部材。 The resin layer of at least one layer is made of a polycarbonate resin, an acrylic resin, a cycloolefin polymer, a fluororesin, and a polyether terephthalate resin provided on the surface of the urethane resin-containing layer opposite to the first glass plate side. The window member according to any one of claims 3 to 5, further comprising a resin layer containing at least one selected resin. 前記少なくとも一層の樹脂層は、前記第１ガラス板と前記ウレタン樹脂含有層との間に設けられた透明樹脂層を含む、請求項３、４、及び６のいずれか１項に記載の窓部材。 The window member according to any one of claims 3, 4, and 6, wherein the at least one resin layer includes a transparent resin layer provided between the first glass plate and the urethane resin-containing layer. .. 前記少なくとも一層の樹脂層は、前記第１ガラス板の主表面と接触する透明樹脂層を含む、請求項１〜４、及び６、７のいずれか１項に記載の窓部材。 The window member according to any one of claims 1 to 4, 6 and 7, wherein the at least one resin layer includes a transparent resin layer in contact with the main surface of the first glass plate. 前記透明樹脂層は、ポリビニルブチラール樹脂を含有する、請求項７または８に記載の窓部材。 The window member according to claim 7 or 8, wherein the transparent resin layer contains a polyvinyl butyral resin. 前記透湿防止材は、コーティング材またはシール材である、請求項１〜９のいずれか１項に記載の窓部材。 The window member according to any one of claims 1 to 9, wherein the moisture permeation preventive material is a coating material or a sealing material. 前記コーティング材は、前記樹脂層の前記第１ガラス板側と反対側の表面が露出しないように設けられ、前記シール材は、前記樹脂層の端面が露出しないように設けられた、請求項１０に記載の窓部材。 10. The coating material is provided so that the surface of the resin layer opposite to the first glass plate side is not exposed, and the sealing material is provided so that the end face of the resin layer is not exposed. The window member described in. 前記コーティング材は、ＳｉＯ２、ポリブチレン、エポキシ樹脂、アクリル樹脂、シリコーン、ポリイミド、ビニルアルコール、及びシクロオレフィンポリマーから選ばれる少なくとも１つを含む、請求項１０または１１に記載の窓部材。 The window member according to claim 10 or 11, wherein the coating material contains at least one selected from SiO 2 , polybutylene, epoxy resin, acrylic resin, silicone, polyimide, vinyl alcohol, and cycloolefin polymer. 前記シール材は、ポリブチレン、エポキシ樹脂、アクリル樹脂、シリコーン、ポリイミド、ビニルアルコール、及びシクロオレフィンポリマーから選ばれる少なくとも１つを含む、請求項１０〜１２のいずれか１項に記載の窓部材。 The window member according to any one of claims 10 to 12, wherein the sealing material contains at least one selected from polybutylene, epoxy resin, acrylic resin, silicone, polyimide, vinyl alcohol, and cycloolefin polymer. 平面視において前記電波透過部材を備える第１の領域と、前記第１ガラス板の主表面と対向する第２ガラス板を備える第２の領域とを有する、請求項１〜１３のいずれか１項に記載の窓部材。 One of claims 1 to 13, which has a first region including the radio wave transmitting member and a second region including a second glass plate facing the main surface of the first glass plate in a plan view. The window member described in. 前記第１ガラス板の平面視において、前記第１の領域の外縁は前記第１ガラス板の外縁よりも内側にある、請求項１４に記載の窓部材。 The window member according to claim 14, wherein the outer edge of the first region is inside the outer edge of the first glass plate in a plan view of the first glass plate. 前記第２の領域において、前記少なくとも一層の樹脂層は、前記第１ガラス板と前記第２ガラス板の間に備える透明樹脂層を含む、請求項１４または１５に記載の窓部材。 The window member according to claim 14 or 15, wherein in the second region, the at least one layer of resin layer includes a transparent resin layer provided between the first glass plate and the second glass plate. 前記透明樹脂層は、ポリビニルブチラール樹脂を含有する、請求項１６に記載の窓部材。 The window member according to claim 16, wherein the transparent resin layer contains a polyvinyl butyral resin. 前記第１ガラス板は厚さ１．１ｍｍ以上であり、
平面視において前記電波透過部材を備える領域に、前記第１ガラス板の主表面に対して６７．５°の入射角で入射する周波数Ｆ（ＧＨｚ）の電波の透過率Ｔ（Ｆ）が、６０ＧＨｚ≦Ｆ≦１００ＧＨｚの範囲で下記式（１）を満足する、請求項１〜１７のいずれか１項に記載の窓部材。
Ｔ（Ｆ）＞−０．００６１×Ｆ＋０．９３８４ ・・・（１） The first glass plate has a thickness of 1.1 mm or more and has a thickness of 1.1 mm or more.
The transmittance T (F) of the radio wave of the frequency F (GHz) that is incident on the main surface of the first glass plate at an incident angle of 67.5 ° in the region including the radio wave transmitting member in a plan view is 60 GHz. The window member according to any one of claims 1 to 17, which satisfies the following formula (1) in the range of ≦ F ≦ 100 GHz.
T (F)> -0.0061 x F + 0.9384 ... (1) 請求項１〜１８のいずれか１項に記載の窓部材と、
前記窓部材に取り付けるハウジングと、を備える、ハウジング付窓部材。 The window member according to any one of claims 1 to 18, and the window member.
A window member with a housing comprising a housing attached to the window member. 第１の領域を覆うように前記ハウジングが第２の領域に設けられている、請求項１９に記載のハウジング付窓部材。 The window member with a housing according to claim 19, wherein the housing is provided in the second region so as to cover the first region.
JP2020030807A 2020-02-26 2020-02-26 Window member Pending JP2021134112A (en)

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