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JPH0386646A - Decoration member for vehicle - Google Patents

Decoration member for vehicle

Info

Publication number
JPH0386646A
JPH0386646A JP22521789A JP22521789A JPH0386646A JP H0386646 A JPH0386646 A JP H0386646A JP 22521789 A JP22521789 A JP 22521789A JP 22521789 A JP22521789 A JP 22521789A JP H0386646 A JPH0386646 A JP H0386646A
Authority
JP
Japan
Prior art keywords
diffraction grating
film
decorative member
vehicle
back coat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP22521789A
Other languages
Japanese (ja)
Inventor
Michio Chatani
茶谷 道夫
Shinichi Asano
慎一 浅野
Ichiro Soma
相馬 一郎
Masatoshi Shimizu
正敏 清水
Hiroshi Uehara
浩 上原
Takao Igarashi
孝雄 五十嵐
Hiromi Sakuma
広美 佐久間
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kuraray Co Ltd
Original Assignee
Kuraray Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kuraray Co Ltd filed Critical Kuraray Co Ltd
Priority to JP22521789A priority Critical patent/JPH0386646A/en
Publication of JPH0386646A publication Critical patent/JPH0386646A/en
Pending legal-status Critical Current

Links

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  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

PURPOSE:To develop the light rich in decoration performance having the rainbow patterns by forming a diffraction grating on the inner surface of a transparent synthetic resin shaped body and forming a metal thin film and waterproof back coat film in this order onto the surface of the diffraction grating and allowing the solar light, illumination light, etc. to be diffracted, reflect and interfere. CONSTITUTION:A thin metal film 4 and a water-resistive back coat film 5 are formed in this order onto a diffraction grating 2 surface formed on the inner surface of a transparent synthetic resin shaped body 1, and a desired decoration member for vehicle is obtained. When the back coat film 5 side is installed towards a vehicle, the solar light, illuminance light, etc. which are supplied from an outer surface are diffracted, reflected, and are allowed to interfere, and a light rich in the decoration performance having the rainbow pattern can be developed. Further, the groove 3 of the diffraction grating 2 is prevented from being contaminated by muds, etc., and the decoration performance can be maintained for a long period, and the superior durability can be obtained.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、車両用装飾部材に関し、より詳しくは、反射
型回折格子により太陽光、照明光等を回折し虹模様を有
する光彩を反射する意匠性、装飾性に優れた車両用装飾
部材に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a decorative member for a vehicle, and more specifically, a reflective diffraction grating that diffracts sunlight, illumination light, etc. and reflects a rainbow-patterned glow. The present invention relates to a decorative member for a vehicle that has excellent design and decorative properties.

[従来の技術] 太陽光、照明光等を反射して得られる光彩の装飾性を利
用した車両用部材としてはステンレス、アルミニウム等
の金属製円板に同心円状の溝を備えた車両用装飾部材等
がすでに知られている。
[Prior Art] As a vehicle component that utilizes the decorative properties of the glow obtained by reflecting sunlight, illumination light, etc., there is a vehicle decorative component that is provided with concentric grooves on a metal disc made of stainless steel, aluminum, etc. etc. are already known.

[発明が解決しようとする課題] しかしながら、金属製円板に同心円状等の満を備えた車
両用装飾部材の場合、金属製円板の加工法として切削、
放電加工、プレス等種々の方法が知られているが、いず
れの方法も微細な溝を高密度に加工するのは極めて困難
であり、しかも量産には適さないので、溝本数密度は多
いものでも約5本/mm程度と少なく、このため光学効
果は乏ぼしく、反射光による虹模様の光彩は不鮮映で装
飾性は不十分であった。また満にドロ等の汚れが入り込
むと光学効果がなくなる為表面に透明塗装を施してもよ
いが十分な耐久性が得られないなどの問題があり、更に
金属である為重い等の問題点を有していた。
[Problems to be Solved by the Invention] However, in the case of a decorative member for a vehicle in which a metal disc has a concentric shape or the like, the processing method for the metal disc is cutting,
Various methods are known, such as electrical discharge machining and pressing, but it is extremely difficult to machine fine grooves with high density with any of these methods, and they are not suitable for mass production, so even if the number of grooves is high, it is difficult to process them. The number of lines was as low as about 5 lines/mm, and therefore the optical effect was poor, and the rainbow pattern caused by the reflected light was blurry and the decorativeness was insufficient. In addition, if dirt and grime get in, the optical effect will be lost, so transparent coating may be applied to the surface, but there are problems such as insufficient durability, and since it is made of metal, there are problems such as heavy weight. had.

従って、本発明は上記問題点を解決すべく、溝本数密度
が高く十分な回折効果により装飾性に優れた鮮映な光彩
を反射し、溝の汚れ等により回折効果の損われる事がな
く、さらに軽量で量産性に優れた車両用装飾部材を提供
することを目的とし、さらには耐候性・耐熱性・耐水性
等の耐久性に優れた車両用装飾部材を提供することを目
的とする。
Therefore, in order to solve the above-mentioned problems, the present invention has a high number of grooves and has a sufficient diffraction effect to reflect a clear and decorative glow, and the diffraction effect is not impaired by dirt etc. on the grooves. Furthermore, it is an object of the present invention to provide a decorative member for a vehicle that is lightweight and excellent in mass production, and a further object of the present invention is to provide a decorative member for a vehicle that is excellent in durability such as weather resistance, heat resistance, and water resistance.

[課題を角q決するための手段] 本発明者等は、上記問題点を解決すべく鋭意検討した結
果、透明合成樹脂成形体の内表面に回折格子を有し、該
回折格子面に金属薄膜および耐水性バックコート膜をこ
の順に備え、反射型回折格子を形成する部材により本発
明の目的を達成できることを見出し、本発明を完成した
[Means for resolving the problem] As a result of intensive studies to solve the above problems, the present inventors have found that a transparent synthetic resin molded body has a diffraction grating on its inner surface, and a metal thin film is formed on the surface of the diffraction grating. The present inventors have discovered that the object of the present invention can be achieved by a member comprising a reflective diffraction grating and a water-resistant back coat film in this order, and have completed the present invention.

以下、本発明をさらに詳しく説明する。The present invention will be explained in more detail below.

本発明に使用される透明合成樹脂は、濁りなどのない実
質的に透明なアクリル樹脂、ポリカーボネート樹脂、ポ
リエチレンテレフタレート樹脂、ポリスチレン樹脂等が
挙げられ、耐候性の点からメタクリル系樹脂が好ましく
、さらに耐候性・耐熱性をともに満足する樹脂として架
橋メタクリル系樹脂が特に好ましい。耐候性・耐熱性が
優れている事は車両用部材として有利であるばかりでな
く、特に耐熱性の優れていることは後述の金属薄膜の形
成、バックコート膜の形成に際し必要に応じて高温処理
も可能となる為、耐久性を向上する車が容易となり製法
上極めて有利である。
The transparent synthetic resin used in the present invention includes substantially transparent acrylic resin without turbidity, polycarbonate resin, polyethylene terephthalate resin, polystyrene resin, etc., and methacrylic resin is preferable from the viewpoint of weather resistance, and weather resistance is more preferable. A crosslinked methacrylic resin is particularly preferred as a resin that satisfies both properties and heat resistance. Excellent weather resistance and heat resistance are not only advantageous for vehicle parts, but especially excellent heat resistance allows for high-temperature treatment as necessary when forming metal thin films and back coat films, which will be described later. This makes it possible to easily produce cars with improved durability, which is extremely advantageous in terms of manufacturing method.

本発明にいうメタクリル系樹脂は、メチルメタクリレー
トを主体とし、メチルメタクリレートを含む一官能性不
飽和単量体群より選ばれた1種または2種以上の不飽和
111 m体よりなる重合体であり、該不飽和!11量
体中に占めるメチルメタクリレートの割合は、50重量
%以上、好ましくは70重量%以上、より好ましくは9
0重量%以上である。上記メチルメタクリレートと併用
し得る一官能性不飽和単量体は、重合体または共重合し
得るものであればよく、特に制限はない。そのようなも
のの例としては、1分子中の炭素原子数が2〜18個の
一価アルコールとメタクリル酸とのエステル、1分子中
の炭素原子数が1〜18個の一価アルコールとアクリル
酸とのエステル、1分子中の炭素原子数が2〜4個の二
価アルコールとアクリル酸またはメタクリル酸とのモノ
エステル、アクリル酸、メタクリル酸、無水マレイン酸
、アクリロニトリル、メタクリロニトリル、アクリルア
ミド、メタクリルアミド、マレイミド類、アクルル酸金
属塩類、スチレン、α−メチルスチレン、酢酸ビニル、
塩化ビニル、塩化ビニリデン、弗化ビニリデン、エチレ
ン、グリシジルメタクリレート、ビニルトリエトキシラ
ン、γ−メタクロキシプロピルトリメトキシシランなど
をあげることができる。
The methacrylic resin referred to in the present invention is a polymer mainly composed of methyl methacrylate and one or more unsaturated 111 m monomers selected from a group of monofunctional unsaturated monomers including methyl methacrylate. , the unsaturated! The proportion of methyl methacrylate in the 11-mer is 50% by weight or more, preferably 70% by weight or more, more preferably 9% by weight or more.
It is 0% by weight or more. The monofunctional unsaturated monomer that can be used in combination with the above-mentioned methyl methacrylate is not particularly limited as long as it can be polymerized or copolymerized. Examples of such substances include esters of monohydric alcohols with 2 to 18 carbon atoms per molecule and methacrylic acid, and esters of monohydric alcohols with 1 to 18 carbon atoms per molecule with acrylic acid. monoester of dihydric alcohol with 2 to 4 carbon atoms per molecule and acrylic acid or methacrylic acid, acrylic acid, methacrylic acid, maleic anhydride, acrylonitrile, methacrylonitrile, acrylamide, methacrylic Amides, maleimides, acrylic acid metal salts, styrene, α-methylstyrene, vinyl acetate,
Examples include vinyl chloride, vinylidene chloride, vinylidene fluoride, ethylene, glycidyl methacrylate, vinyltriethoxylane, and γ-methacroxypropyltrimethoxysilane.

また本発明では、耐熱性の向上を目的として架橋メタク
リル系樹脂を使用されるが、該樹脂は上記のメチルメタ
クリレートを主体とし、メチルメタアクリレートを含む
一官能性不飽和単量体群より選ばれた1種または2tT
i以上の一官能性不飽和単量体30〜98重量%および
多官能性不飽和単量体2〜70重量%からなる不飽和単
量体の重合体である。本発明に使用される多官能性不飽
和111量体は、1分子中に2個以上の不飽和結合を有
する化合物で、これらの不飽和結合の少なくとも2個は
、メチルメタクリレートを主体とする一官能性不飽和単
量体と共重合し得るものでなければならない。そのよう
な多官能性不飽和単量体の例としては、アクリル酸およ
び、またはメタクリル酸と多価アルコールとのポリエス
テル、ジビニルベンゼン、トリアクリルイソシアヌレー
トなどをあげることができるが、これらに限定されるも
のではない。多官能性不飽和単量体は、2種以上併用す
ることも可能である。
In addition, in the present invention, a crosslinked methacrylic resin is used for the purpose of improving heat resistance, and the resin is mainly composed of the above-mentioned methyl methacrylate and is selected from the group of monofunctional unsaturated monomers including methyl methacrylate. 1 type or 2tT
It is a polymer of unsaturated monomers consisting of 30 to 98% by weight of a monofunctional unsaturated monomer of i or more and 2 to 70% by weight of a polyfunctional unsaturated monomer. The polyfunctional unsaturated 111-mer used in the present invention is a compound having two or more unsaturated bonds in one molecule, and at least two of these unsaturated bonds are monomers mainly composed of methyl methacrylate. It must be copolymerizable with the functional unsaturated monomer. Examples of such polyfunctional unsaturated monomers include, but are not limited to, polyesters of acrylic acid and/or methacrylic acid with polyhydric alcohols, divinylbenzene, triacrylisocyanurate, etc. It's not something you can do. Two or more types of polyfunctional unsaturated monomers can also be used in combination.

以上に説明した多官能性不飽和多量体の中でも、耐熱性
向上の目的にはメタクリル酸と多価アルコールとのポリ
エステルが好ましく、とりわけ2個のメタクリロイルを
基を連結する最少の原子数が10以下のものが特に好ま
しい。そのようなものの例としては、エチレングリコー
ルジメタクリレート、ジエチレングリコールジメタクリ
レート、トリエチレングリコールジメタクリレート、プ
ロピレングリコールジメタクリレート、ジプロピレング
リコールジメタクリレート、1,3−ブチレングリコー
ルジメタクリレート、ネオペンチルグリコールジメタク
リレート、1.6−ヘキサンシオールジメタクリレート
、テトラメチロールメタンテトラメタクリレート、トリ
メチロールエタントリメタクリレート、トリメチロール
プロパントリメタクリレート、ペンタエリスリトールト
リメタクリレート、ジペンタエリスリトールへキサメタ
クリレートなどをあげることができる。
Among the polyfunctional unsaturated polymers described above, polyesters of methacrylic acid and polyhydric alcohols are preferred for the purpose of improving heat resistance, and in particular, the minimum number of atoms connecting two methacryloyl groups is 10 or less. Particularly preferred are those. Examples of such are ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, propylene glycol dimethacrylate, dipropylene glycol dimethacrylate, 1,3-butylene glycol dimethacrylate, neopentyl glycol dimethacrylate, 1 .6-hexanethiol dimethacrylate, tetramethylolmethanetetramethacrylate, trimethylolethane trimethacrylate, trimethylolpropane trimethacrylate, pentaerythritol trimethacrylate, dipentaerythritol hexamethacrylate, and the like.

多官能性不飽和単量体の使用量は、メチルメタクリレー
トを主体とする一官能性不飽和単量体と多官能性不飽和
単量体の総量を基準にして2〜70重量%、好ましくは
5〜50重量%、より好ましくは10〜3CH1%であ
る。多官能性不飽和単量体の使用量が2重量%未満であ
ると耐熱性が不足であり、70重置部を越えると脆くな
るので適切ではない。
The amount of the polyfunctional unsaturated monomer used is 2 to 70% by weight, preferably 2 to 70% by weight based on the total amount of the monofunctional unsaturated monomer mainly composed of methyl methacrylate and the polyfunctional unsaturated monomer. It is 5 to 50% by weight, more preferably 10 to 3CH1%. If the amount of polyfunctional unsaturated monomer used is less than 2% by weight, the heat resistance will be insufficient, and if it exceeds 70 parts, it will become brittle, which is not appropriate.

本発明のメタクリル系樹脂及び架橋メタクリル系樹脂は
、必ずしも一種類の重合体で構成される必要はなく、組
成あるいは、分子量などの異なる重合体の混合物であっ
てもよい。またグルタルイミド環を有するメタクリル樹
脂でもよい。
The methacrylic resin and crosslinked methacrylic resin of the present invention do not necessarily need to be composed of one type of polymer, and may be a mixture of polymers having different compositions or molecular weights. Alternatively, a methacrylic resin having a glutarimide ring may be used.

以上述べた透明合成樹脂は、透明性を損なうことのない
範囲で染料・顔料等の着色剤、熱安定剤、滑剤、紫外線
吸収剤、光安定剤等を含有するこ−とができる。
The above-mentioned transparent synthetic resin can contain colorants such as dyes and pigments, heat stabilizers, lubricants, ultraviolet absorbers, light stabilizers, etc. within a range that does not impair transparency.

本発明において、内表面に回折格子を有する透明合成樹
脂成形品の成形方法には特に制限はなく、1f意の方法
を採用することができる。その主なものとして、任意の
方法で予め成形した成形体の内表面に所定の回折格子を
切削する方法、成形品の内表面となる面に所定の回折格
子を備えた型材よりなる鋳型内に不飽和単量体等を注入
して重合する方法、成形品の内表面となる面に所定の回
折格子を備えた金型を使用して種々の成形材料を射出成
形または圧縮成形する方法、或いは特開昭60−202
128、特開昭62−1705に示されているように、
−官能性不飽和4%量体および多官能性不飽和単量体か
らなる不飽和++ta体を適当な重合開始剤の存在下に
加熱して部分架橋ゲル状重合体とし、必要に応じて粉砕
した後、成形品・内表面となる面に所定の回折格子を備
えた金型を使用して圧縮成形する方法などを挙げること
ができる。いずれの方法も後述する様な微細で溝本数密
度の高い回折格子を成形体の表面に容易に施すことが可
能であり、量産も容易である。ここで、本発明において
、「内表面」とは本発明による車両用装飾部材を車両、
車両用装飾部品等に取付ける側の表面を示す。
In the present invention, there is no particular restriction on the method of molding a transparent synthetic resin molded product having a diffraction grating on the inner surface, and any method may be employed. The main methods include cutting a predetermined diffraction grating on the inner surface of a molded product pre-formed by any method, and cutting a predetermined diffraction grating into the inner surface of the molded product. A method of injecting and polymerizing unsaturated monomers, a method of injection molding or compression molding of various molding materials using a mold equipped with a predetermined diffraction grating on the inner surface of the molded product, Japanese Patent Publication No. 1986-202
128, as shown in JP-A-62-1705,
- An unsaturated ++ta form consisting of a functional unsaturated 4% monomer and a polyfunctional unsaturated monomer is heated in the presence of a suitable polymerization initiator to form a partially crosslinked gel-like polymer, and if necessary, pulverized. After that, compression molding may be performed using a mold having a predetermined diffraction grating on the inner surface of the molded product. Either method can easily provide a fine diffraction grating with a high groove number density on the surface of a molded body, as will be described later, and mass production is also easy. Here, in the present invention, the "inner surface" refers to the vehicle decorative member according to the present invention,
Shows the surface to be attached to vehicle decorative parts, etc.

また回折格子の「溝本数密度」は、回折格子の長さ1關
当りの溝本数(単位二本/關)と定義される。但し上記
の回折格子の長さは同心円状及びスパイラル状の回折格
子の場合は中心線上、平行線状の回折格子の場合には満
に対して直角な線上で測るものとする。また本発明の車
両用装飾部材の構成の一態様を、例えば第1図の如くそ
の断面を部分拡大した概念図で例示することができる。
Further, the "groove number density" of a diffraction grating is defined as the number of grooves per length of the diffraction grating (unit: 2 grooves/square). However, the length of the above-mentioned diffraction grating shall be measured on the center line in the case of a concentric circular or spiral diffraction grating, and on a line perpendicular to the full circle in the case of a parallel line diffraction grating. Further, one aspect of the configuration of the vehicle decorative member of the present invention can be illustrated, for example, with a conceptual diagram in which a cross section thereof is partially enlarged as shown in FIG.

これらの成形体の形状には特に制限はないが、厚さ約1
ml1〜IC1mm程度の板状であることが好ましく、
リブ、孔等の加工が施されていても、また開口部があっ
ても良い。
There are no particular restrictions on the shape of these molded bodies, but the thickness of approximately 1
It is preferably plate-shaped with a size of about ml1 to IC1mm,
It may be processed with ribs, holes, etc., or may have openings.

本発明の回折格子の溝形状は一般に知られているブレー
ズド格子、ニジエル格子、正弦波格子、ラミナー格子の
いずれでもよく、また例えば第2図、第3図に示す様な
、実質的に回折面を有する形状であってもよい。さらに
これらを紹合わせて使用してもよい。ブレーズド格子、
ニジエル格子、第2図、第3図に例示した様な実質的に
回折面を有する形状の場合、回折面の傾きには特に制限
はないが2〜85″が好ましく、5〜65″が特に好ま
しい。溝の深さは特に制限されるものではない。また上
記の溝は連続又は不連続な平行線状、同心固状又はスパ
イラル状のいずれの配置でもよいが、同心円状又はスパ
イラル状に配置された溝の場合、回折して反射する光彩
が同心円又はスパイラルの中心より放射状に放たれた虹
模様を発現し装飾性に富む為好ましく、さらに成形体や
金型等への回折格子加工の容易さから、回折格子の占有
面積が比較的大きい場合には同心円状、小さい場合には
スパイラル状に配置された満が有利である。
The groove shape of the diffraction grating of the present invention may be any of the generally known blazed gratings, Nisiel gratings, sinusoidal gratings, and laminar gratings, and may have substantially diffraction surfaces as shown in FIGS. 2 and 3, for example. It may be a shape having. Furthermore, these may be used together. blazed lattice,
In the case of a Nisiel grating, which has a shape that substantially has a diffraction surface as illustrated in FIGS. 2 and 3, the inclination of the diffraction surface is not particularly limited, but is preferably 2 to 85", particularly 5 to 65". preferable. The depth of the groove is not particularly limited. Furthermore, the above-mentioned grooves may be arranged in a continuous or discontinuous parallel line shape, a concentric solid shape, or a spiral shape. However, in the case of grooves arranged in a concentric circle or a spiral shape, the diffracted and reflected light will be concentric or It is preferable because it expresses a rainbow pattern that radiates from the center of the spiral and is highly decorative, and it is also easy to process a diffraction grating into molded objects or molds, so it is suitable when the area occupied by the diffraction grating is relatively large. A concentric arrangement or, in small cases, a spiral arrangement is advantageous.

本発明において、回折格子の溝本数密度は、回折による
反射光が鮮映な光彩を形成する範囲であれば特に制限は
ないが、20〜1500本/mmの範囲が好ましく、さ
らに50〜1200本/關の範囲が特に好ましく、また
2種類以上組合わせることも可能である。溝本数密度が
20本/ m+sより少ないと反射光の強度が弱くなる
為光彩が不鮮明で装飾性に乏ぼしく、また1500本/
IIImを越えると回折光の波長が短波長になり実用的
でないばかりでなく、成形体や金型等への回折格子の加
工が困難となり本発明の目的には不適切である。
In the present invention, the groove number density of the diffraction grating is not particularly limited as long as the reflected light due to diffraction forms a clear glow, but it is preferably in the range of 20 to 1500 grooves/mm, more preferably 50 to 1200 grooves/mm. A range of / is particularly preferred, and it is also possible to combine two or more types. If the groove number density is less than 20 grooves/m+s, the intensity of the reflected light will be weak, resulting in an unclear glow and poor decorativeness;
If it exceeds IIIm, the wavelength of the diffracted light becomes short, which is not only impractical, but also makes it difficult to process a diffraction grating into a molded body, mold, etc., making it inappropriate for the purpose of the present invention.

本発明の上記透明合成樹脂成形体に施された回折格子の
表面に設ける金属薄膜は、アルミニウム、ニッケル、ク
ロム、ニッケル−クロムの任意組成比よりなるニッケル
−クロム合金、銀、銅、M等の少なくともいずれか1つ
の金属より選ばれるが、アルミニウム、クロム含有Ei
llO〜20%のニッケル−クロム合金または銀が好ま
しく、成形体の部位によって異なる金属を使ってもよい
。上記金属薄膜の膜厚は、反射鏡或いは装飾品として使
用可能な反射率を有する最低限度の膜厚を有し、かつ成
形体との密着性を損なわず膜にクラック発生等の外観欠
点を生じない範囲であれば特に制限はないが、好ましく
は300人〜2000人、さらに好ましくは500Å〜
1000入である。該薄膜の形成方法としては、上記膜
厚の膜が得られる方法であれば特に制限されるものでは
ないが、例えば真空蒸着、スパッタリング、イオンアシ
スト蒸着、イオンブレーティングなどの乾式法および湿
式メツキ法による直接成膜、もしくはこれらの方法で予
め別の材料に形成させた膜を合成樹脂成形体に転写させ
るホットスタンピングなどの方法がある。これらの方法
のうち乾式法が好ましく、さらに真空蒸着、スパッタリ
ングが特に好ましい。
The metal thin film provided on the surface of the diffraction grating applied to the transparent synthetic resin molded body of the present invention may be made of aluminum, nickel, chromium, a nickel-chromium alloy having an arbitrary composition ratio of nickel-chromium, silver, copper, M, etc. At least one metal selected from aluminum and chromium-containing Ei
A nickel-chromium alloy or silver containing 110 to 20% is preferred, and different metals may be used depending on the part of the compact. The thickness of the metal thin film mentioned above is the minimum thickness that has a reflectance that can be used as a reflective mirror or decorative item, and does not impair adhesion to the molded object without causing appearance defects such as cracks in the film. There is no particular restriction as long as it is within the range, but preferably 300 to 2000 people, more preferably 500 Å to
It comes in 1000 pieces. The method for forming the thin film is not particularly limited as long as it can obtain a film with the above-mentioned thickness, and examples include dry methods such as vacuum evaporation, sputtering, ion-assisted evaporation, and ion blating, and wet plating methods. There are methods such as direct film formation using these methods, or hot stamping in which a film previously formed on another material by these methods is transferred to a synthetic resin molded body. Among these methods, dry methods are preferred, and vacuum evaporation and sputtering are particularly preferred.

また本発明においては上記の金属薄膜を、傷つきや水分
、酸素等による変質等から保護する目的で該金属薄膜の
外側に耐水性バックコート膜を施すことが行われる。耐
水性バックコート膜とは、本発明の車両用装飾部材を湿
度の高い使用環境に暴露しても金属薄膜の変質を十分に
抑えうる樹脂を塗膜形成要素とする塗膜であり、該樹脂
はポリブタジェン、スチレン−ブタジエン共重合体、ポ
リイソプレン、スチレン−イソプレン共重合体、ポリク
ロロプレン、イソプレン−イソブチレン共重合体、アル
キッド系樹脂、アクリルウレタン系樹脂を示すものとす
る。これらバックコート膜用の樹脂を任意に選択するこ
とは可能であるが、金属薄膜が例えばアルミニウムの場
合にはポリブタジェン、スチレン−ブタジエン共重合体
、ポリイソプレン、スチレン−イソプレン共重合体、ポ
リクロロプレン、イソプレン−イソブチレン共重合体が
好ましく、車両外のような例えば高温・多湿さらに塩水
が関与する苛酷な環境で使用する場合は特にポリブタジ
ェンが好ましい。また金属薄膜がニッケル−クロム合金
の場合はアルキッド系樹脂、アクリルウレタン系樹脂が
好ましく、車両外の様な例えば高温・多湿さらに塩水が
関与する苛酷な環境で使用する場合には特にアルキッド
系樹脂が好ましい。
Further, in the present invention, a water-resistant back coat film is applied to the outside of the metal thin film in order to protect the metal thin film from scratches and deterioration due to moisture, oxygen, etc. The water-resistant backcoat film is a coating film whose film-forming element is a resin that can sufficiently suppress deterioration of the metal thin film even when the vehicle decorative member of the present invention is exposed to a high-humidity usage environment. represents polybutadiene, styrene-butadiene copolymer, polyisoprene, styrene-isoprene copolymer, polychloroprene, isoprene-isobutylene copolymer, alkyd resin, and acrylic urethane resin. It is possible to arbitrarily select the resin for these back coat films, but when the metal thin film is made of aluminum, for example, polybutadiene, styrene-butadiene copolymer, polyisoprene, styrene-isoprene copolymer, polychloroprene, Isoprene-isobutylene copolymers are preferred, and polybutadiene is particularly preferred when used in harsh environments, such as outside vehicles, involving high temperatures, high humidity, and salt water. In addition, when the metal thin film is a nickel-chromium alloy, alkyd resins and acrylic urethane resins are preferable, and alkyd resins are particularly preferred when used in harsh environments such as outside vehicles where high temperatures, humidity, and salt water are involved. preferable.

本発明に用いられるアルキッド系樹脂を塗膜形成要素と
するバックコート膜とは、多塩基酸と3価以上のアルコ
ールとの縮合によってできる高分子物質を塗膜形成要素
[丸善・化学便覧(応用編)昭和40年10月25日発
行、P873]とするものであり、純粋アルキッド樹脂
または脂肪酸、脂肪油、天然樹脂、合成樹脂、イミド等
により変性した変性アルキッド樹脂が挙げられ、耐水性
向上の点からフェノール樹脂、アクリル樹脂、尿素樹脂
、メラミン樹脂等で変性した合成樹脂変性アルキッド樹
脂が好ましい。
The back coat film used in the present invention, which uses an alkyd resin as a film-forming element, is a film-forming element [Maruzen Chemical Handbook (Applied Materials) ed.) published on October 25, 1966, p. 873], and includes pure alkyd resins and modified alkyd resins modified with fatty acids, fatty oils, natural resins, synthetic resins, imides, etc. From this point of view, synthetic resins modified alkyd resins modified with phenol resins, acrylic resins, urea resins, melamine resins, etc. are preferred.

これらのバックコート膜には本発明の効果を損わない範
囲で着色剤、紫外線吸収剤、光安定剤、抗酸化剤などの
添加剤を含有させることができる。
These back coat films can contain additives such as colorants, ultraviolet absorbers, light stabilizers, and antioxidants within a range that does not impair the effects of the present invention.

上記バックコート膜の膜厚は特に制限されるものではな
いが、通常5μ−〜50μ−1好ましくは10μm〜4
0μ謡、特に好ましくは20μ麿〜30μ信であり、該
膜の形成方法としては、前記の樹脂を塗膜形成要素とし
て含有し、必要により溶媒、添加剤等を含有する塗料を
例えばスプレー塗布、流延塗布、刷毛塗り、浸漬塗布、
回転塗布等により塗布し、必要により通常の方法で乾燥
・硬化等の処理を行なう方法が用いられる。また、本発
明の部材の外表面(バックコート膜の反対側の面)は特
に制限されることはないが滑らかな曲面であることが好
ましく、さらにアクリル系あるいはシリコーン系塗料で
表面処理が施されていてもよい。
The thickness of the back coat film is not particularly limited, but is usually 5 μm to 50 μm, preferably 10 μm to 4 μm.
The thickness is 0 μm, particularly preferably 20 μm to 30 μm, and the method for forming the film includes, for example, spray coating with a paint containing the above-mentioned resin as a film-forming element and optionally a solvent, additives, etc. Cast coating, brush coating, dipping coating,
A method is used in which the coating is applied by spin coating or the like, and if necessary, treatments such as drying and curing are performed by ordinary methods. The outer surface of the member of the present invention (the surface opposite to the back coat film) is not particularly limited, but preferably has a smooth curved surface, and is further surface-treated with an acrylic or silicone paint. You can leave it there.

以上の説明の如く構成される車両用装飾部材は、外表面
が滑らかであり、内表面は回折格子を有し、該回折格子
面に金属薄膜および耐水性バックコート膜をこの順に備
えているので、反射型回折格子を形成する。このような
部材は上記の滑らかな外表面を外側にして使用されるか
ら、該外表面より入射した太陽光、照明光等の光は回折
して反射・干渉し虹模様を有する装飾性に富む光彩を発
現するので、車両のデザイン上極めて有用である。
The vehicle decorative member constructed as described above has a smooth outer surface, a diffraction grating on the inner surface, and a metal thin film and a water-resistant back coat film on the diffraction grating surface in this order. , forming a reflective diffraction grating. Since such a member is used with the above-mentioned smooth outer surface on the outside, light such as sunlight and illumination light that enters from the outer surface is diffracted, reflected, and interfered, resulting in a highly decorative rainbow pattern. Since it produces a glow, it is extremely useful in vehicle design.

また上記のような使用法となるので、回折格子溝がドロ
等の汚れにより損なわれる事もなく装飾性を持続するこ
とができる。
Moreover, since the method of use is as described above, the decorativeness of the diffraction grating grooves can be maintained without being damaged by dirt such as mud.

本発明の車両用装飾部材は、回折格子の溝本数密度及び
/又は形状等により光彩の強度と色彩等が、また金属薄
膜の種類と透明合成樹脂成形体に対して必要に応じて施
した着色との組合わせ等により色調等の調節が可能であ
り車両のデザイン上有利である。本発明の車両用装飾部
材の使用に当っては、該部材の一部を切り取って使うこ
とも可能である。また本発明の部材は耐水性バックコー
ト膜を備えているので、湿度が高く苛酷な環境で使用さ
れても金属薄膜の変質はなく、車両用部材として有用で
ある。
In the vehicle decorative member of the present invention, the intensity and color of the brilliance are determined by the number density and/or shape of the grooves of the diffraction grating, and the type of metal thin film and the coloring applied to the transparent synthetic resin molded body as necessary. It is possible to adjust the color tone etc. by combining it with other colors, which is advantageous in terms of vehicle design. When using the vehicle decorative member of the present invention, it is also possible to cut out a part of the member. Further, since the member of the present invention is provided with a water-resistant back coat film, the metal thin film does not deteriorate even when used in a harsh environment with high humidity, and is useful as a vehicle member.

[実施例] 以下、実施例を挙げて本発明をさらに具体的に説明する
がこれにより制限されるものではない。
[Examples] Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto.

実施例における測定・試験は次の方法で行った。Measurements and tests in Examples were performed in the following manner.

(A)部分架橋ゲル状重合体の重合体含有率の測定; ソックスレー抽出器にハイドロキノン七ツメチルエーテ
ルを1,000pI)I添加溶解したジクロロメタン1
50m1を入れ、抽出用円筒濾紙の中に、前記のゲル状
重合体15gを細片状に入れて、50℃に保たれた恒温
水槽中で20時間還流抽出を行い、抽出後、抽出液を1
.200m1のメタノール中に入れ、ポリマー分を分離
し、濾紙中のポリマー分と合わせて、55℃で恒量にな
るまで減圧乾燥し、重合体の重量を求める。
(A) Measurement of polymer content of partially crosslinked gel polymer; Add and dissolve 1,000 pI of hydroquinone methyl ether in a Soxhlet extractor in dichloromethane 1
Put 15 g of the above gel-like polymer in strips into an extraction thimble, perform reflux extraction for 20 hours in a constant temperature water bath kept at 50°C, and after extraction, remove the extract. 1
.. The polymer was placed in 200 ml of methanol, the polymer was separated, and the polymer was combined with the polymer in the filter paper and dried under reduced pressure at 55° C. until a constant weight was obtained, and the weight of the polymer was determined.

(B)一般耐久性評価; 耐水テスト 40℃の温水中に車両用装飾部材を400時間浸漬した
後、該部材の透明合成樹脂成形体の表面外観、および該
成形体を介して表面より観察される金属薄膜の状態、バ
ックコート膜の外観を目視で評価した。
(B) General durability evaluation; Water resistance test After immersing a vehicle decorative member in warm water at 40°C for 400 hours, the surface appearance of the transparent synthetic resin molded body of the member and the surface appearance observed through the molded body were evaluated. The state of the metal thin film and the appearance of the back coat film were visually evaluated.

冷熱湿テスト 一30℃雰囲気で23時間放置した後、室温で1時間放
置し次に110℃雰囲気で23時間放置した後、ふたた
び室温で1時間放置し、つづいて50℃・関係湿度95
%雰囲気で23時間放置し、ふたたび室温で1時間放置
した後、さらに110℃雰囲気で23時間放置し、室温
で1時間放置するテストを4サイクル実施した後、耐水
テストと同様の項目を目視で評価した。
Cooling, heat and humidity test - After being left in a 30℃ atmosphere for 23 hours, left at room temperature for 1 hour, then left in a 110℃ atmosphere for 23 hours, left again at room temperature for 1 hour, and then tested at 50℃ and relative humidity of 95
% atmosphere for 23 hours, then left at room temperature for 1 hour, then left in an atmosphere of 110℃ for 23 hours, and left at room temperature for 1 hour. After 4 cycles, the same items as the water resistance test were visually checked. evaluated.

促進耐候性テスト サンシャインカーボンアークウエザオメータ(スガ試験
機■製)を用いて、ブラックパネル温度63℃にて、車
両用装飾部材の外表面側(バックコート膜の反対側)よ
り1500時間暴露した後、耐水テストと同様の項目を
目視で評価した。
Accelerated Weathering Test Using a Sunshine Carbon Arc Weatherometer (manufactured by Suga Test Instruments), the vehicle decorative member was exposed for 1500 hours from the outer surface side (opposite side of the back coat film) at a black panel temperature of 63°C. Afterwards, the same items as the water resistance test were visually evaluated.

(C)苛酷耐久性評価; 耐熱テスト 予め110℃に加熱した熱風循環式オーブンの中に車両
用装飾部材を入れて400時間加熱した後、耐水テスト
と同様の項目を目視で評価した。
(C) Severe Durability Evaluation; Heat Resistance Test The vehicle decorative member was placed in a hot air circulation oven preheated to 110° C. and heated for 400 hours, and then visually evaluated in the same manner as the water resistance test.

耐塩水テスト 40℃で濃度5%の塩水を噴霧した容器の中に車両用装
飾部材を24時間放置した後、40℃で濃度5%の塩水
中に24時間浸漬するテストを30サイクル実施し、耐
水テストと同様の項目を目視で評価した。
Saltwater Resistance Test A vehicle decorative member was left in a container sprayed with 5% salt water at 40°C for 24 hours, and then immersed in 5% saltwater at 40°C for 24 hours for 30 cycles. The same items as the water resistance test were visually evaluated.

苛酷促進耐候性テスト ブラックパネル温度を83℃とすることを除き促進耐候
性テストと同様に評価した。
Severe accelerated weathering test Evaluation was conducted in the same manner as the accelerated weathering test except that the black panel temperature was 83°C.

実施例1 (1)透明合成樹脂成形体の作製 メチルメタクリレートモノマー70重量部、ネオペンチ
ルグリコールジメタクリレー)30fflffi部、1
.4(8)−P−メンタジェン0,01重量、 2.2
′−アゾビス(4−メトキシ−2,4−ジメチルバレロ
ニトリル) 0.0032重量部および2,2−ビス(
1−ブチルパーオキシ)ブタン0.5重量部、ジ−t−
ブチルパーオキサイド0.2重量部、2−(5−メチル
−2−ヒドロキシフェニル)ベンゾトリアゾール0.1
fflffi部を混合溶解し、2枚のガラス板およびガ
スケットで10mm間隔になるように組立られたセルに
注入し60℃で2時間重合して部分架橋ゲル状重合体を
えた。この部分架橋ゲル状重合体の重合体含有率は30
%であった。この重合体をスクリュー径50關、L/D
−8の押出機で押出したところ最大粒径2mm以下に破
砕された組成物を得た。
Example 1 (1) Preparation of transparent synthetic resin molding 70 parts by weight of methyl methacrylate monomer, 30 fflffi parts of neopentyl glycol dimethacrylate, 1
.. 4(8)-P-Mentagene 0.01 weight, 2.2
'-azobis(4-methoxy-2,4-dimethylvaleronitrile) 0.0032 parts by weight and 2,2-bis(
0.5 parts by weight of 1-butylperoxy)butane, di-t-
Butyl peroxide 0.2 parts by weight, 2-(5-methyl-2-hydroxyphenyl)benzotriazole 0.1
The fffffi portion was mixed and dissolved, and poured into a cell assembled with two glass plates and a gasket at a spacing of 10 mm, and polymerized at 60° C. for 2 hours to obtain a partially crosslinked gel polymer. The polymer content of this partially crosslinked gel polymer is 30
%Met. This polymer was used with a screw diameter of 50 mm, L/D
When extruded using an extruder No.-8, a composition crushed to a maximum particle size of 2 mm or less was obtained.

次に予め135℃に加熱した直径が150閣で、コア側
全面に回折格子をスパイラル状に(コア型とスパイラル
の中心は一致する)配置してなる円形平板金型に上記組
成物54gを充填し、圧力10kg/cdで1分間加圧
した後、200kg/cdで20分間保圧し金型より取
り出した。その後140℃の熱風オーブン内で10時間
加熱して、直径150+om、板厚的2.5 am、図
4に示す形状の回折格子が満水数密度600本/關で、
内表面全体にスパイラル状に配置された透明合成樹脂成
形体を得た。該成形体より切り出したサンプルの熱変形
温度(ASTM−D648)は153℃であった。
Next, 54 g of the above composition was filled into a circular flat plate mold having a diameter of 150 mm and having a diffraction grating arranged in a spiral shape over the entire surface of the core side (the centers of the core mold and the spiral coincided), which had been heated to 135°C in advance. After pressurizing for 1 minute at a pressure of 10 kg/cd, the pressure was maintained at 200 kg/cd for 20 minutes, and then taken out from the mold. After that, it was heated in a hot air oven at 140°C for 10 hours to obtain a diffraction grating with a diameter of 150+ om, a plate thickness of 2.5 am, and a shape shown in Fig. 4 at a full water number density of 600 lines/square.
A transparent synthetic resin molded body was obtained which was arranged in a spiral over the entire inner surface. The heat distortion temperature (ASTM-D648) of a sample cut out from the molded body was 153°C.

(2〉金属薄膜の形成 上記(1)でi′7た成形体の回折格子面に、アルミニ
ウムを真空蒸着して、膜厚700人のアルミニウム膜を
形成した。真空蒸着条件は次の通りである。
(2> Formation of metal thin film Aluminum was vacuum deposited on the diffraction grating surface of the molded body obtained in (1) above to form an aluminum film with a thickness of 700 mm.The vacuum deposition conditions were as follows. be.

真空蒸着装置;日本真空技術■製5RC−10成膜時の
圧力;5×10−5ト一ル 基体温度;20〜30℃ 金属の蒸発方法:タングステンフィラメントによる抵抗
加熱 堆積速度;35〜40人/秒 (3)バックコート膜の形成 塗膜形成要素としてポリブタジェン30重量部と、顔料
としてカーボンブラック0.2重量部、酸化チタン6.
5重量部、酸化鉄エロー2.2重量部、ケイソウ上4.
3重量部、リン酸亜鉛系防食顔料4重量部、微粒子状タ
ルク2.8重量部と、その他添加剤としてフェニル−β
−ナフチルアミン1重量部およびトルエン、キシレンを
混合比率4対6で混合した溶媒を主成分とする混合溶媒
50重量部とを混合して調整した塗料を、上記(2)で
得られたアルミニウム膜上にスプレー塗装し、40℃の
熱風オーブン中で30分間、乾燥硬化処理した。
Vacuum deposition equipment: 5RC-10 manufactured by Japan Vacuum Technology ■ Pressure during film formation: 5 x 10-5 torr Substrate temperature: 20 to 30°C Metal evaporation method: Resistance heating with tungsten filament Deposition rate: 35 to 40 people /sec (3) Formation of back coat film 30 parts by weight of polybutadiene as a coating film forming element, 0.2 parts by weight of carbon black as a pigment, and 6 parts by weight of titanium oxide.
5 parts by weight, iron oxide yellow 2.2 parts by weight, diatomaceous 4.
3 parts by weight, 4 parts by weight of zinc phosphate anticorrosive pigment, 2.8 parts by weight of finely divided talc, and phenyl-β as other additives.
- A paint prepared by mixing 1 part by weight of naphthylamine and 50 parts by weight of a mixed solvent whose main component is a mixture of toluene and xylene at a mixing ratio of 4:6 was applied to the aluminum film obtained in (2) above. The coating was spray-coated and dried and cured in a hot air oven at 40°C for 30 minutes.

得られたバックコート膜の膜厚は約25μmであった。The thickness of the obtained back coat film was about 25 μm.

(4)評価 以上のようにして得られた車両用装飾部材(以下部材と
略す)の外観は良好であり、外表面(バックコート膜の
反対側)に太陽光を当てると、スパイラルの中心より放
射状に、鮮映な虹模様を有する光彩が反射した。また耐
久性の結果は表1及び表2に示す様に良好であった。
(4) Evaluation The appearance of the vehicle decorative member (hereinafter referred to as the member) obtained as described above is good, and when sunlight is applied to the outer surface (opposite side of the back coat film), the center of the spiral A brilliant rainbow-like glow was reflected in a radial pattern. Furthermore, the durability results were good as shown in Tables 1 and 2.

実施例2 実施例1と同様にして、直径150關、板厚約2.5關
、図5に示す形状の回折格子が満水数密度75本/關で
、内表面全体にスパイラル状に配置された透明合成樹脂
成形体を得た。該成形体の回折格子面に実施例1と同様
にして、膜厚700人のアルミニウム膜を形成した後、
ポリブタジェンを塗膜形成要素とする膜厚的25μmの
バックコート膜を形成した。
Example 2 In the same manner as in Example 1, diffraction gratings having a diameter of 150 mm, a plate thickness of about 2.5 mm, and the shape shown in FIG. A transparent synthetic resin molded body was obtained. After forming an aluminum film with a thickness of 700 mm on the diffraction grating surface of the molded body in the same manner as in Example 1,
A back coat film having a thickness of 25 μm was formed using polybutadiene as a film forming element.

以上のようにして得られた部材の外観は良好であり、外
表面に太陽光を当てると実施例1と同様、鮮映な虹模様
を有する光彩が反射した。また耐久性評価の結果は表1
及び表2に示す様に良好であった。
The appearance of the member obtained as described above was good, and when sunlight was applied to the outer surface, a bright rainbow pattern was reflected as in Example 1. The results of durability evaluation are shown in Table 1.
As shown in Table 2, the results were good.

実施例3 (1)透明合成樹脂成形体の作製と金属薄膜の形成実施
例1と同様にして得られた成形体の回折格子面に、ニッ
ケル−クロム合金(クロム含有量20%)を膜厚700
Åとなる様に真空蒸着した。
Example 3 (1) Preparation of transparent synthetic resin molded body and formation of metal thin film A film of nickel-chromium alloy (chromium content 20%) was applied to the diffraction grating surface of the molded body obtained in the same manner as in Example 1. 700
Vacuum evaporation was carried out so that

真空蒸着条件は、堆積速度を10−15人/秒とする事
を除き、実施例1と同じにした。
Vacuum deposition conditions were the same as in Example 1 except that the deposition rate was 10-15 people/sec.

(2〉バックコート膜の形成 (1〉で得られたニッケル−クロム合金膜上に、塗膜形
成要素としてアクリル変性アルキッド樹脂24重量部と
熱可塑性アクリル樹脂24重量部と、顔料としてカーボ
ンブラック0.5重量部、酸化チタン7.0重量部、ケ
イソウ土9.0重量部、リン酸亜鉛系防食顔料5.0重
量部、微粒子状タルク3,0重量部と、助剤類3.51
fi量部、およびトルエン、キシレンを混合比率4対6
で混合した溶媒を主成分とする混合溶媒24重量部とを
混合して調整したアルキッド系塗料をスプレー塗装した
後、100℃の熱風オープン中で30分間乾燥・硬化処
理して膜厚約25μ躍のバックコート膜を形成した。
(2> Formation of back coat film (1) On the nickel-chromium alloy film obtained in step 1, 24 parts by weight of acrylic modified alkyd resin and 24 parts by weight of thermoplastic acrylic resin are added as coating film forming elements, and 0 parts of carbon black is used as pigment. .5 parts by weight, 7.0 parts by weight of titanium oxide, 9.0 parts by weight of diatomaceous earth, 5.0 parts by weight of zinc phosphate anticorrosive pigment, 3.0 parts by weight of fine particulate talc, and 3.51 parts by weight of auxiliaries.
fi amount, and toluene and xylene at a mixing ratio of 4:6.
After spray painting an alkyd paint prepared by mixing 24 parts by weight of a mixed solvent mainly composed of the solvent mixed in above, the paint was dried and cured for 30 minutes in an open hot air at 100°C to form a film with a thickness of approximately 25 μm. A back coat film was formed.

〈3)評価 以上のようにして得られた部材の外観は良好であり、外
表面に太陽光を当てると実施例1と同様、鮮映な虹模様
を有する光彩が反射した。また耐久性評価の結果は表1
及び表2に示す様に良好であった。
(3) Evaluation The appearance of the member obtained as described above was good, and when the outer surface was exposed to sunlight, a bright rainbow pattern was reflected as in Example 1. The results of durability evaluation are shown in Table 1.
As shown in Table 2, the results were good.

実施例4 (1)透明合成樹脂成形体の作製 メチルメタクリレートモノマーの使用量を95!ri′
量部、ネオペンチルグリコールジメタクリレートの使用
量を5重量部、2,2′−アゾビス(4−メトキシ−2
,4−ジメチルバレロニトリル)の使用量を0.01重
量部とする以外は実施例1と同様にして重合体含有率3
4%の部分架橋ゲル状重合体を得た後、破砕した。
Example 4 (1) Preparation of transparent synthetic resin molded article The amount of methyl methacrylate monomer used was 95! ri′
5 parts by weight of neopentyl glycol dimethacrylate, 2,2'-azobis(4-methoxy-2
, 4-dimethylvaleronitrile) was used in the same manner as in Example 1, except that the amount of 0.01 parts by weight was used, except that the polymer content was 3.
After obtaining a 4% partially crosslinked gel polymer, it was crushed.

次に、上記組成物を使用して金型コア面に設けられた回
折格子の配置がコア型と中心の一致する同心円であるこ
と、金型温度が120℃であること、熱風オーブンの温
度が115℃であることを除き、実施例1と同様にして
、直径150mm、板厚約2.5關、図4に示す断面形
状の回折格子が満水数密度600本/市で、内表面全体
に同心円状に配置された透明合成樹脂成形体を得た。該
成形体の1部を切り出したサンプルの熱変形温度は12
0℃であった。
Next, the arrangement of the diffraction grating provided on the mold core surface using the above composition is a concentric circle whose center coincides with the core mold, the mold temperature is 120 ° C., and the temperature of the hot air oven is In the same manner as in Example 1 except that the temperature was 115°C, a diffraction grating with a diameter of 150 mm, a plate thickness of approximately 2.5 mm, and a cross-sectional shape shown in FIG. Transparent synthetic resin molded bodies arranged concentrically were obtained. The heat distortion temperature of a sample cut out from a part of the molded body was 12
It was 0°C.

(2)金属薄膜およびバックコート膜の形成(1)で得
られた成形体の回折格子面に実施例3と同様にしてニッ
ケル−クロム合金膜、つづいてアルキッド系樹脂を塗膜
形成要素とするバックコート膜を形成した。
(2) Formation of metal thin film and back coat film A nickel-chromium alloy film is applied to the diffraction grating surface of the molded body obtained in (1) in the same manner as in Example 3, followed by an alkyd resin as a coating film forming element. A back coat film was formed.

(3)評価 以上のようにして得られた部材の外観は良好であり、外
表面に太陽光を当てると同心円の中心より放射状に、鮮
映な虹模様を有する光彩が反射した。また耐久性評価の
結果は表1及び表2に示す様に良好であった。
(3) Evaluation The appearance of the member obtained as described above was good, and when sunlight was applied to the outer surface, a bright rainbow pattern was reflected radially from the center of the concentric circles. Furthermore, the results of durability evaluation were good as shown in Tables 1 and 2.

実施例5 (1)透明合成樹脂成形体の作製 直径150mm、板厚2.5m+eの架橋メタクリル系
樹脂注型板(協和ガス化学工業■製パラリンクスTS4
0 、熱変形温度140℃)の内表面に、図6に示す形
状の回折格子を溝本数密度300本/關で同心円状(同
心円の中心は板と一致)に配置する様に切削した。
Example 5 (1) Preparation of a transparent synthetic resin molded body Cross-linked methacrylic resin casting plate with a diameter of 150 mm and a plate thickness of 2.5 m+e (Paralinks TS4 manufactured by Kyowa Gas Chemical Co., Ltd.)
Diffraction gratings having the shape shown in FIG. 6 were cut on the inner surface of the substrate (with a heat deformation temperature of 140° C.) so as to be arranged in concentric circles (the center of the concentric circles coincided with the plate) at a groove density of 300 grooves/square.

〈2〉金属薄膜及びバックコート膜の形成(1)で得た
成形体の回折格子面に、実施例1と同様にしてアルミニ
ウム膜及びポリブタジェンを塗膜成形要素とするバック
コート膜を形成した。
<2> Formation of metal thin film and back coat film On the diffraction grating surface of the molded body obtained in (1), a back coat film using an aluminum film and polybutadiene as film forming elements was formed in the same manner as in Example 1.

〈3〉評価 以上の様にして得られた部材の外観は良好であり、外表
面に太陽光を当てると実施例4と同様の効果を発現した
。また耐久性評価の結果は表1及び表2に示す様に良好
であった。
<3> Evaluation The appearance of the member obtained as described above was good, and when the outer surface was exposed to sunlight, the same effect as in Example 4 was expressed. Furthermore, the results of durability evaluation were good as shown in Tables 1 and 2.

実施例6 透明合成樹脂成形体作製に使用する材料を通常メタクリ
ル系樹脂注型板(協和ガス化学工業■製バラグラス)と
する事を除き実施例5と同じ方法で部材を作った。
Example 6 A member was produced in the same manner as in Example 5, except that the material used to produce the transparent synthetic resin molded body was a regular methacrylic resin casting plate (Rose Glass manufactured by Kyowa Gas Chemical Co., Ltd.).

外観は良好であり、外表面に太陽光を当てると実施例4
と同様の効果を発現した。また耐久性評価の結果は表1
及び表2に示す様に、良好であった。但し耐熱テスト温
度は、透明合成樹脂成形体の熱変形温度が約105℃で
あることから、110℃より80℃に変更した。同様に
冷熱湿テストの高温側温度を110℃より80℃に変更
した。
The appearance is good, and when the outer surface is exposed to sunlight, Example 4
The same effect was obtained. The results of durability evaluation are shown in Table 1.
As shown in Table 2, the results were good. However, the heat resistance test temperature was changed from 110°C to 80°C because the heat distortion temperature of the transparent synthetic resin molded body is about 105°C. Similarly, the high temperature side temperature of the cold heat and humidity test was changed from 110°C to 80°C.

実施例7 実施例1と同様にして得た成形体の回折格子面に、実施
例1と同様にしてアルミニウム膜を形成した後、実施例
3と同様にしてアルキッド系樹脂を塗膜形成要素とする
バックコート膜を形成した。
Example 7 An aluminum film was formed in the same manner as in Example 1 on the diffraction grating surface of a molded body obtained in the same manner as in Example 1, and then an alkyd resin was used as a coating film forming element in the same manner as in Example 3. A back coat film was formed.

以上のようにして得られた部材の外観は良好であり、外
表面に太陽光を当てると実施例1と同様、鮮映な虹模様
を有する光彩が反射した。また耐久性評価の結果は表1
及び表2に示す様に、一般耐久性評価は良好であったが
、苛酷耐久性評価では耐塩水テストにおいてアルミニウ
ム膜の金属光沢が点状に欠損する累常が認められた。
The appearance of the member obtained as described above was good, and when sunlight was applied to the outer surface, a bright rainbow pattern was reflected as in Example 1. The results of durability evaluation are shown in Table 1.
As shown in Table 2, the general durability evaluation was good, but in the severe durability evaluation, it was observed that the metallic luster of the aluminum film was repeatedly lost in dots in the salt water resistance test.

実施例8 実施例1と同様にして得た成形体の回折格子面に、実施
例3と同様にしてニッケル−クロム合金膜を形成した後
、該金属薄膜上にアクリルウレタン系塗料(オリジン電
気■製オリジブレート2)をスプレー塗装し、70℃の
熱風オーブン中で40分間乾燥硬化して膜厚約25μ園
のバックコート膜を形成した。
Example 8 After forming a nickel-chromium alloy film in the same manner as in Example 3 on the diffraction grating surface of the molded body obtained in the same manner as in Example 1, an acrylic urethane paint (Origin Denki) was applied on the metal thin film. A backcoat film having a thickness of about 25 μm was formed by spray coating the original plate 2) and drying and curing in a hot air oven at 70° C. for 40 minutes.

以上のようにして得られた部材の外観は良好であり、外
表面に太陽光を当てると実施例1と同様、鮮映な虹模様
を有する光彩が反射した。また耐久性評価の結果は表1
及び表2に示す様に、一般耐久性評価は良好であったが
、苛酷耐久性評価では耐熱テストと苛酷促進耐候性テス
トにおいて密着不良が発生した。
The appearance of the member obtained as described above was good, and when sunlight was applied to the outer surface, a bright rainbow pattern was reflected as in Example 1. The results of durability evaluation are shown in Table 1.
As shown in Table 2, the general durability evaluation was good, but in the severe durability evaluation, poor adhesion occurred in the heat resistance test and the severe accelerated weathering test.

比較例1 回折格子の満水数密度を5本/ mmとする事を除き、
実施例1と同じ方法で部材を作った。該部材に太陽光を
当てても反射光は鮮映な虹模様を有する光彩とならなか
った。
Comparative Example 1 Except that the full water number density of the diffraction grating was 5 lines/mm,
A member was made in the same manner as in Example 1. Even when the member was exposed to sunlight, the reflected light did not have a clear rainbow pattern.

[発明の効果コ 以上述べたように本発明は、透明合成樹脂成形体の内表
面に回折格子を有し、該回折格子面に金属薄膜および耐
水性バックコート膜をこの順に備えた車両用装飾部材で
あるから、反射型回折格子を形成し、上記バックコート
膜側を車両に向けて取付けると、外表面(部材の反バッ
クコート膜側の表面)より入射した太陽光、照明光等の
光は回折して反射・干渉し、虹模様を有する装飾性に富
む光彩を発現するので車両のデザイン上極めて有用であ
るばかりでなく、軽量で破損しにくく、また量産性に優
れているので工業上有利である。また上記の様な使用法
となるので、回折格子溝がドロ等の汚れにより損なわれ
る事もなく装飾性を持続することができるし、耐久性に
優れているので苛酷な環境条件下でも使用することがで
きる。
[Effects of the Invention] As described above, the present invention provides a vehicle decoration having a diffraction grating on the inner surface of a transparent synthetic resin molded body, and having a metal thin film and a water-resistant back coat film on the diffraction grating surface in this order. Since it is a component, if a reflective diffraction grating is formed and the backcoat film side is mounted toward the vehicle, light such as sunlight or illumination light that enters from the outer surface (the surface of the component opposite to the backcoat film) will be removed. It diffracts, reflects, and interferes, creating a highly decorative rainbow-like glow, which is not only extremely useful for vehicle design, but also lightweight, resistant to damage, and excellent for mass production, making it ideal for industrial use. It's advantageous. In addition, since it is used as described above, the diffraction grating grooves are not damaged by dirt or other dirt and can maintain their decorative properties, and their excellent durability allows them to be used even under harsh environmental conditions. be able to.

さらに本発明の車両用装飾部材は、回折格子の満水数密
度及び/又は形状等により上記光彩の強度と色彩等が、
また金属薄膜の種類と透明合成樹脂成形体に対して必要
に応じて施した着色との組合わせ等により色、凋等の調
節が可能であり、車両のデザイン上有利である。
Furthermore, in the vehicle decorative member of the present invention, the intensity and color of the glow can be adjusted depending on the full number density and/or shape of the diffraction grating.
Further, the color, deterioration, etc. can be adjusted by combining the type of metal thin film and the coloring applied to the transparent synthetic resin molded body as necessary, which is advantageous in terms of vehicle design.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は車両用装飾部材の一実施例の断面部分拡大概念
図、第2図および第3図は回折格子部分拡大図、第4図
、第5図、第6図は各実施態様の成形体断面の部分拡大
図をそれぞれ示す。 1・・・透明合成樹脂成形体、2・・・回折格子、3・
・・回折格子の満部分、4・・・金属薄膜、5・・・バ
ックコート膜。
Fig. 1 is an enlarged conceptual view of a cross-sectional part of one embodiment of a decorative member for a vehicle, Figs. 2 and 3 are enlarged views of a part of a diffraction grating, and Figs. 4, 5, and 6 are moldings of each embodiment. Partially enlarged views of body cross sections are shown. 1... Transparent synthetic resin molded body, 2... Diffraction grating, 3...
...Full portion of the diffraction grating, 4...Metal thin film, 5...Back coat film.

Claims (1)

【特許請求の範囲】 1、透明合成樹脂成形体の内表面に回折格子を有し、該
回折格子面に金属薄膜および耐水性バックコート膜をこ
の順に備えることを特徴とする車両用装飾部材。 2、金属薄膜がアルミニウム、および耐水性バックコー
ト膜がポリブタジエン、スチレン−ブタジエン共重合体
、ポリイソプレン、スチレン−イソプレン共重合体、ポ
リクロロプレン、イソプレン−イソブチレン共重合体か
らなる群より選ばれた少なくとも1種類の樹脂を塗膜形
成要素とする塗膜である請求項1記載の車両用装飾部材
。 3、金属薄膜がニッケル−クロム合金、および耐水性バ
ックコート膜がアルキッド系樹脂、アクリルウレタン系
樹脂の少なくとも1種類を塗膜形成要素とする塗膜であ
る請求項1記載の車両用装飾部材。 4、合成樹脂がメタクリル系樹脂である請求項1乃至3
記載の車両用装飾部材。 5、合成樹脂が架橋メタクリル系樹脂である請求項1乃
至3記載の車両用装飾部材。 6、成形体の形状が板状である請求項1乃至5記載の車
両用装飾部材。 7、回折格子が、同心円状又はスパイラル状の溝よりな
る請求項1乃至6記載の車両用装飾部材。 8、回折格子の溝本数密度が20〜1500本/mmの
範囲の少なくとも1種類の回折格子よりなる請求項1乃
至7記載の車両用装飾部材。
[Scope of Claims] 1. A decorative member for a vehicle, characterized in that it has a diffraction grating on the inner surface of a transparent synthetic resin molded body, and a metal thin film and a water-resistant back coat film are provided in this order on the diffraction grating surface. 2. The metal thin film is aluminum, and the water-resistant back coat film is at least selected from the group consisting of polybutadiene, styrene-butadiene copolymer, polyisoprene, styrene-isoprene copolymer, polychloroprene, and isoprene-isobutylene copolymer. The decorative member for a vehicle according to claim 1, which is a coating film comprising one type of resin as a coating film forming element. 3. The decorative member for a vehicle according to claim 1, wherein the metal thin film is a nickel-chromium alloy, and the water-resistant back coat film is a film containing at least one of an alkyd resin and an acrylic urethane resin as a film forming element. 4. Claims 1 to 3, wherein the synthetic resin is a methacrylic resin.
The vehicle decorative member described above. 5. The decorative member for a vehicle according to any one of claims 1 to 3, wherein the synthetic resin is a crosslinked methacrylic resin. 6. The decorative member for a vehicle according to any one of claims 1 to 5, wherein the molded body has a plate-like shape. 7. The decorative member for a vehicle according to any one of claims 1 to 6, wherein the diffraction grating comprises concentric or spiral grooves. 8. The decorative member for a vehicle according to any one of claims 1 to 7, comprising at least one type of diffraction grating having a groove number density in the range of 20 to 1500 grooves/mm.
JP22521789A 1989-08-31 1989-08-31 Decoration member for vehicle Pending JPH0386646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22521789A JPH0386646A (en) 1989-08-31 1989-08-31 Decoration member for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22521789A JPH0386646A (en) 1989-08-31 1989-08-31 Decoration member for vehicle

Publications (1)

Publication Number Publication Date
JPH0386646A true JPH0386646A (en) 1991-04-11

Family

ID=16825824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22521789A Pending JPH0386646A (en) 1989-08-31 1989-08-31 Decoration member for vehicle

Country Status (1)

Country Link
JP (1) JPH0386646A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000023287A1 (en) * 1998-10-16 2000-04-27 Minnesota Mining And Manufacturing Company Decorative film and method for the production of the same
US6383613B1 (en) 1998-10-16 2002-05-07 3M Innovative Properties Company Decorative film and method for the production of the same
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GB2446906A (en) * 2007-02-22 2008-08-27 Sanko Gosei Kk Decoration panel comprising plurality of reflection portions
JP2017100603A (en) * 2015-12-03 2017-06-08 トピー工業株式会社 Wheel for steel vehicle and surface finishing method thereof
CN108016349A (en) * 2016-11-04 2018-05-11 福特全球技术公司 vehicle decorative member
CN108082060A (en) * 2016-11-22 2018-05-29 福特全球技术公司 Send the indicating package of visible rainbow patterns
EP3725506A4 (en) * 2017-12-15 2021-01-20 Lg Chem, Ltd. Decoration member and method for producing same
US11971564B2 (en) 2017-12-15 2024-04-30 Lg Chem, Ltd. Decorative member and manufacturing method therefor

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000023287A1 (en) * 1998-10-16 2000-04-27 Minnesota Mining And Manufacturing Company Decorative film and method for the production of the same
US6383613B1 (en) 1998-10-16 2002-05-07 3M Innovative Properties Company Decorative film and method for the production of the same
GB2446907A (en) * 2007-02-22 2008-08-27 Sanko Gosei Kk Decoration panel comprising plurality of reflection portions
GB2446906A (en) * 2007-02-22 2008-08-27 Sanko Gosei Kk Decoration panel comprising plurality of reflection portions
GB2446907B (en) * 2007-02-22 2010-08-25 Sanko Gosei Kk Decoration panel
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JP2017100603A (en) * 2015-12-03 2017-06-08 トピー工業株式会社 Wheel for steel vehicle and surface finishing method thereof
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