JPH0448345B2

JPH0448345B2 -

Info

Publication number: JPH0448345B2
Application number: JP61237638A
Authority: JP
Inventors: Tadao Ishibashi
Original assignee: Chisso Corp
Current assignee: JNC Corp
Priority date: 1986-10-06
Filing date: 1986-10-06
Publication date: 1992-08-06
Also published as: JPS6391242A

Description

[Detailed description of the invention]

（産業上の利用分野）本発明は金属蒸着積層フイルムに関する。更に
詳しくはヒートシール包装用として剛性・耐ブロ
ツキング性に優れ、かつ、耐衝撃性の著しく改善
された金属蒸着ポリプロピレン系積層フイルムに
関する。（従来技術）近年、プラスチツクフイルムに真空下で金属を
蒸着させた金属蒸着フイルムが上市され、その優
れた装飾性、ガスバリヤー性および光線遮断性等
を活用して金銀糸、建築材料および包装材料等に
広く使用されており、特にアルミニウム蒸着フイ
ルムは包装用を中心に大量に使用されるようにな
つて来た。一方、プロピレンを主成分とする結晶性エチレ
ン−プロピレンランダム共重合体、結晶性プロピ
レン−ブテン−１共重合体、結晶性エチレン−プ
ロピレン−ブテン−１ランダム共重合体等の結晶
性プロピレン系ランダム共重合体は、その優れた
透明性・耐衝撃性およびヒートシール性等を生か
し、一般包装用・ラミネート用等を主体に広く用
いられている。しかしながら、この結晶性プロピレン系ランダ
ム共重合体からなるフイルムに金属蒸着した場
合、蒸着膜との接着力が弱い。蒸着面への印刷
性・接着性等が極端に低下する等の問題があり、
この対策として多くの提案がなされている。たとえば、特公昭60−61553号公報には、ポリ
プロピレンまたはプロピレン共重合体を溶融押出
し後50〜90℃に徐冷し、ポリプロピレン分子の結
晶化を促進させフイルム密度を増大した粗面化フ
イルムを得、このフイルムにコロナ放電処理した
のちに金属を蒸着してなる金属蒸着ポリプロピレ
ンフイルムが提案されている。（発明が解決しようとする問題点）この公報のフイルムはフイルム表面が粗面化
している為蒸着面が“艶消し”調となり、金属光
沢を有する蒸着フイルムが得られない。またフイ
ルムが徐冷・高密度化されている為脆く、かつ、
耐衝撃性がきわめて劣る。また、蒸着面の印刷
性、接着性改善には何ら効果が無い等の欠点を有
する。本発明者は、結晶性プロピレン系ランダム共重
合体からなる優れた金属蒸着フイルムを得るべく
詳細に検討し、先に特開昭59−25829号公報にて
特定のプロピレン共重合体に特定のポリエチレン
を特定量配合する事を骨子とした金属蒸着用ポリ
オレフイン組成物を提案した。この組成物を用い
た蒸着フイルムは蒸着膜の接着性に優れ、剛性、
耐ブロツキング性にも優れるだけでなく、蒸着面
の印刷性・接着性も良好な実用性のきわめて高い
ものであるが、通常のプロピレン系共重合体から
なるフイルムに比して、裂け易く、耐衝撃性が劣
るという欠点を有する為に、用途展開上の大きな
制約となつていた。本発明者は、これら従来法の特長を生かし、か
つ、耐衝撃性の優れた金属蒸着フイルムを得るべ
く種々検討した。その結果、特定の構成の積層フ
イルムに金属蒸着したフイルムが、蒸着膜の接着
性、蒸着面の印刷性・接着性、耐プロツキング
性・剛性及び加工性に優れ、かつ、目的とした耐
衝撃性も著しく改善されたものである事を見出
し、本発明に到達した。（問題点を解決するための手段）本発明は、以下の構成を有する。結晶融点が150℃以下の結晶性プロピレン系共
重合体70〜98重量％および密度0.930以上のエチ
レン系共重合体２〜30重量％からなるＡ層、エチ
レン含有量が３〜30重量％の結晶性エチレン・プ
ロピレンブロツク共重合体もしくは該結晶性エチ
レン・プロピレンブロツク共重合体にエチレン−
α−オレフイン共重合体ゴムを30重量％以下配合
してなるＢ層が、Ａ／Ｂ／Ａの構成で三層に積層され、かつ、Ａ層の少なくと
も一方の面に金属を蒸着してなる金属蒸着積層フ
イルム。本発明は、特定の、組成の異なるＡ／Ｂ／Ａの
二種三層からなる積層フイルムのＡ層の少なくと
も一方の面に金属蒸着してなる金属蒸着積層フイ
ルムを特徴とするが、以下、その構成について更
に詳述する。本発明のＡ層に用いる結晶融点が150℃以下の
結晶性プロピレン系共重合体は、主成分のプロピ
レンとコモノマーのエチレンもしくは炭素数４以
上のα−オレフインとを混合し、例えば、チーグ
ラー・ナツタ系等公知のα−オレフインの立体規
則性重合触媒を用いてスラリー法、溶液法及び気
相重合法等の公知の方法で共重合させる事によつ
て得ることができる。このような共重合体の具体
例としては、エチレン・プロピレンランダム共重
合体、プロピレン−ブテン−１共重合体、エチレ
ン・プロピレン・ブテン−１三元共重合体等が挙
げられる。また、これらの共重合体を無水マレイン酸、ア
クリル酸等の不飽和カルボン酸またはその誘導体
等で変性した変性共重合体でも良いし、これらの
混合物またはエチレン・ａ−オレフイン共重合体
ゴム等の他種ポリマー類を少量添加したものでも
良い。但し、本発明においては、該共重合体は結
晶融点が150℃以下でなければならない。結晶融
点が150℃を越えるものはヒートシール性が劣り、
また耐衝撃性も低下し、かつ、蒸着膜の接着性も
低下する傾向にあり好ましくない。エチレン含有
量が１〜６重量％でかつ、結晶融点が140℃以下
のエチレン・プロピレン共重合体、エチレン含有
量が１〜６重量％、ブテン−１含有量が１〜25重
量％でかつ、結晶融点が140℃以下のエチレン・
プロピレン・ビテン−１三元共重合体が本発明に
おいては特に望ましい。また、Ａ層においては、上記の結晶性プロピレ
ン系共重合体に密度0.930以上のエチレン系重合
体を２〜30重量％添加して用いるが、このエチレ
ン系重合体はエチレンの単独重合体、エチレンを
主成分とするプロピレンまたは炭素数４以上のα
−オレフインとの共重合体を包含するが、密度が
0.930以上でなければならず、0.935以上であるこ
とが望ましい。密度が0.930未満では、剛性・耐ブロツキング
性が劣り、巻姿が良好で加工性に優れた金属蒸着
積層フイルムが得られない。また、結晶性プロピ
レン系共重合体に対する該エチレン系重合体の添
加量は２〜30重量％、望ましくは３〜20重量％で
ある。この添加量が２重量％未満では、剛性・耐
ブロツキング性の改善効果が不足し、30重量％を
越えるとフイルムが裂け易く、かつ、脆くなり、
また、平滑な表面を有するフイルムも得られにく
くなるので好ましくない。本発明でＢ層に用いる結晶性エチレン・プロピ
レンブロツク共重合体は、エチレンの含有量が３
〜30重量％、特に好ましくは４〜25重量％のもの
である。該ブロツク共重合体は、α−オレフインの立体
規則性重合用として公知の触媒、たとえば、遷移
金属を含む固体触媒成分と有機アルミニウム化合
物もしくはこれらと電子供与性有機化合物とから
得られる、いわゆるチーグラー・ナツタ系触媒等
を用いてプロピレンとエチレンとをブロツク共重
合することによつて得られるものである。該固体
触媒成分としてはプロピレンの重合で公知であ
り、三塩化チタンまたはその共晶体、マグネシウ
ム系化合物などの担体（あらかじめ他の化合物と
処理してもよい。）に三価もしくは四価のチタン
化合物または該化合物と他の化合物を処理するこ
とによつて得られるものが代表例としてあげられ
る。また、ブロツク共重合の方法としては、二段な
いし三段以上の多段重合が一般的であり、たとえ
ば、第一段階でプロピレンの単独重合またはプロ
ピレンと少量のエチレン（またはａ−オレフイ
ン）とを共重合し、次いで第二段階においてプロ
ピレンとエチレンとを共重合する方法、この方法
にさらに第三段階においてエチレンを単独重合ま
たはプロピレンを共重合する方法、これらの段階
をさらに増やす多段階重合、上記の第一と第二段
階を逆にする方法等、一般に知られているブロツ
ク共重合法を採用することができる。このブロツ
ク共重合体は、赤外線吸収スペクトルにおける
720cm^-1と731cm^-1の吸光度比A720／A731が0.5以
上、メルトフローレート（MFR、温度230℃、荷
重2.16Kgを加えた場合の10分間の溶融樹脂の吐出
量）が0.1〜30のものが好ましい。また、本発明
のＢ層に用いるブロツク共重合体には、エチレン
−α−オレフイン共重合体ゴムを30重量％以下、
好ましくは２〜20重量％配合する事によつて更に
耐衝撃性を向上することが出来る。このエチレン
−α−オレフイン共重合体ゴムはエチレンを主成
分とするプロピレン、ブテン−１、４−メチル−
１−ペンテン等のａ−オレフインとの非晶性また
は部分結晶性共重合体であり、１，４−ヘキサジ
エン、エチリデンノルボルネン等のジエン成分を
少量含んでも良い。このうちエチレン含有量が50
〜85重量％、α−オレフインとしてはプロピレン
またはブテン−１を用い、バナジウム系触媒で共
重合させて得られるMFRが0.5〜30で、前記のブ
ロツク共重合体のメルトフローレートとの比が共
重合ゴムのMFR／ブロツク共重合体のMFRで
0.2〜20の範囲のものを選択して用いるのが特に
好ましい。本発明のＡ層及びＢ層に用いる共重合体にはき
わめて特定された酸化防止剤、無機充填剤及び他
種ポリマーを限定して添加するのが特に望まし
い。すなわち、従来から結晶性ポリプロピレン系
樹脂からなるフイルムに通常添加されている常温
で液状の添加剤、可塑剤、滑剤、スリツプ剤、帯
電防止剤及び触媒成分の中和剤、滑剤等として常
用されている脂肪酸及びその金属塩等の脂肪酸誘
導体等は、蒸着膜の接着力を低下させるのみなら
ず蒸着面の印刷性・接着性を著しく阻害し、性能
を低下させるので好ましくない。これらは、たと
え本発明の積層体の芯層のみに用いても経済的に
表層に移行し同様に性能を低下させるので好まし
くない。したがつて、望ましい添加剤としてはき
わめて限定され、分子量が500以上の熱安定剤・
酸化防止剤、シリカ・ゼオライト・炭酸カルシウ
ム等の無機充填剤及び接着性改善のためのカルボ
ン酸変性ポリオレフイン等のポリマー添加剤類等
が望ましい。本発明のＡ層、Ｂ層は、Ａ／Ｂ／Ａの構成で三
層に積層される。この二種三層の積層の方法は、
Ａ層用には１〜２台、Ｂ層用には１台の合計２な
いし３台の押出機を用いて溶融押出し、フイード
ブロツク法・共押出多層ダイ法等公知の方法で、
アダプター部又はダイ内等で溶融状態で積層した
後、空気・冷却水、冷却ロール等で冷却してフイ
ルム化する三層共押出積層方式によつて得られ
る。他の積層方式、たとえば、一方のフイルム上
に他方を溶融押出する押出ラミネート方式、接着
剤を用いて貼り合せ積層する押出ラミネート方式
等では両面にラミネートする必要がありコスト上
不利であり、また、Ａ層・Ｂ層共個々には薄膜で
滑り性が劣り、かつ柔軟で伸び易い為ラミネート
加工の際、シワが入り均一な膜が得難い。更に、
Ａ層、Ｂ層間の層間接着力も劣り、コスト・性能
両面から劣るものであり好ましくない。本発明のＡ，Ｂ層は、Ａ／Ｂ／Ａの順序に積層
する事が必要であり、Ｂ／Ａ／Ｂの順序ではＢ層
に金属を蒸着する必要があり、蒸着膜の接着性が
劣り、蒸着面の金属光沢がうしなわれ、ヒートシ
ール性・スリツプ性等も劣り実用上問題である。
尚、本発明のＡ／Ｂ／Ａの構成での各層の厚み比
は任意であるが、実質的に有用な引裂き強さ、耐
衝撃性を付与する為にはＢ層の厚みは全体の25〜
90％が望ましく、特に30〜70％が望ましい。Ｂ層
の厚み比が大きいほど耐引裂・耐衝撃性に優れ、
Ａ層の厚み比が大きいほどヒートシール性に優れ
る。このようにして得られたＡ／Ｂ／Ａ三層共押
出フイルムのＡ層の少なくとも一方の面に表面処
理を施した後真空下で金属を蒸着し、目的とする
金属蒸着積層フイルムを得ることが出来る。この
表面処理の方法は、酸処理、火炎処理、プラズマ
処理またはコロナ放電処理等いずれでも良いが、
積層フイルムを連続的に容易に処理できるコロナ
放電処理が経済的に有利であり、窒素、炭酸ガ
ス、酸素等の特定ガス雰囲気下や、フイルムの加
熱下でコロナ放電処理もしくはプラズマ処理して
処理効果を向上させる事も有効である。この表面
処理を実施しないと、蒸着膜の接着力が不足す
る。この表面処理の度合はJIS Ｋ 6768の方法で
測定したぬれ指数が35dyn／cm以上になるように
処理するのが望ましく、38〜43dyn／cmが特に望
ましい。尚、フイルムと金属との接着をより強固
にする為にフイルムの処理面に、ポリエステル
系；ポリウレタン系；エポキシ樹脂等の接着剤を
アンカーコート（Anchor Coat）してから蒸着
しても良い。次に、このＡ層に金属を蒸着する方法は真空蒸
着法、スパツタリング法、イオン線法等公知のい
ずれの方法をも用いることが出来るが、フイルム
の繰出部、蒸着部、巻取部を備えた真空蒸着装置
内でオイルポンプ、拡散ポンプを併用して装置内
の気圧を10^-4Torr程度に減圧し、アルミニウム、
ニツケル、金、銀等の所望の金属を入れた容器ま
たは所望の金属を付着させたフイラメントを加熱
して該金属を溶解蒸発させ、蒸着分子を繰出され
た積層フイルムのＡ層の少なくとも一方の表面に
連続的もしくは部分的に蒸着させ巻取る方法が一
般的である。尚、蒸着金属としては作業性・経済
性からアルミニウムが望ましく、蒸着層の厚さは
蒸着膜の接着性から数十〜数百オングストロール
（Å）程度である。（発明の効果）本発明の金属蒸着積層フイルムは、片面蒸着ま
たは両面蒸着フイルムとしてその優れた耐衝撃性
を生かしそれ自身単体でも有用で装飾用、包装用
等に用いる事が出来るが、更に、蒸着面の接着性
が優れている特長を生かし、傷付き防止等蒸着面
の保護や着色等を目的にトツプコートしたり、印
刷をしたり、また、接着剤をアンカーコートした
後熱可塑性ポリエステル樹脂、ナイロン、結晶性
ポリプロピレン等の延伸または未延伸のフイル
ム・シート等をラミメートする事によつて、剛
性・強度等をさらに向上させ、バリヤー性及び装
飾効果も有する機能性の高い包装材料として多く
の用途に好適に使用することができる。（実施例）以下、実施例；比較例によつて本発明を更に具
体的に説明する。本発明で用いる各特性の測定方
法は次の方法によつた。 (1) メルトフローレート（MFR）：JIS Ｋ 7210
−1976、ポリプロピレン及びプロピレン系共重
合体は試験条件１４（230℃、21.6Kg）、ポリエ
チレン系及びエチレン−α−オレフイン共重合
体ゴムは試験条件４（190℃、2.16Kg）で測定
した。 (2) 結晶融点（Tm）：走査型差動熱量計（略
称：DSC）を用いて窒素雰囲気中で10mgの試
料を10℃／分の速度で昇温させて得られる結晶
の融解に伴なう吸熱カーブのピーク温度（単
位：℃）で表わす。 (3) ぬれ指数：JIS Ｋ 6768の方法で、フイルム
面・蒸着面共測定した。（単位：dyn／cm） (4) 衝撃強度：ASTM Ｄ 781に準じ、東洋精
機製振子型フイルム衝撃試験機を用いて23℃、
湿度50％下で測定した。（単位：Kg・cm／cm） (5) 蒸着膜の接着性：蒸着フイルムを温度40℃、
湿度90％の恒温恒湿槽中に24時間放置した後、
蒸着膜側に幅18mmのセルフアン粘着テープ（セ
キスイセロテープを70mmの長さに貼りつけた
後、手で素早く剥ぎ取り、粘着テープに付着せ
ず試料フイルム面に残存する蒸着膜の面積率を
求め下記のランク付けをした。 (Industrial Application Field) The present invention relates to a metal-deposited laminated film. More specifically, the present invention relates to a metal-deposited polypropylene laminated film for use in heat-seal packaging, which has excellent rigidity and anti-blocking properties, and has significantly improved impact resistance. (Prior art) In recent years, metal-deposited films, in which metals are deposited on plastic films under vacuum, have been put on the market.Using their excellent decorative properties, gas barrier properties, and light blocking properties, they can be used for gold and silver thread, building materials, and packaging materials. In particular, aluminum-deposited films have come to be used in large quantities mainly for packaging. On the other hand, crystalline propylene-based random copolymers such as crystalline ethylene-propylene random copolymers, crystalline propylene-butene-1 copolymers, and crystalline ethylene-propylene-butene-1 random copolymers containing propylene as a main component Polymers are widely used mainly for general packaging and laminates due to their excellent transparency, impact resistance, heat sealability, etc. However, when a film made of this crystalline propylene-based random copolymer is vapor-deposited with metal, the adhesion to the vapor-deposited film is weak. There are problems such as extremely poor printability and adhesion to the vapor-deposited surface.
Many proposals have been made as countermeasures against this problem. For example, Japanese Patent Publication No. 60-61553 discloses that polypropylene or propylene copolymer is melt-extruded and then gradually cooled to 50 to 90°C to obtain a roughened film that promotes crystallization of polypropylene molecules and increases film density. A metal-deposited polypropylene film has been proposed, which is obtained by subjecting this film to a corona discharge treatment and then depositing a metal thereon. (Problems to be Solved by the Invention) Since the film disclosed in this publication has a roughened film surface, the deposited surface has a "matte" appearance, and a deposited film with metallic luster cannot be obtained. In addition, because the film is slowly cooled and densified, it is brittle and
Impact resistance is extremely poor. Furthermore, it has the disadvantage that it has no effect on improving the printability or adhesion of the vapor-deposited surface. The present inventor conducted detailed studies in order to obtain an excellent metal-deposited film made of a crystalline propylene random copolymer, and previously reported in JP-A No. 59-25829 that a specific propylene copolymer was used with a specific polyethylene film. We have proposed a polyolefin composition for metal deposition based on a specific amount of . The vapor-deposited film using this composition has excellent adhesion, rigidity,
It not only has excellent blocking resistance, but also has good printability and adhesion on the vapor-deposited surface, making it highly practical. However, compared to films made of ordinary propylene copolymers, it tears easily and has poor durability. It has the disadvantage of poor impact resistance, which has been a major constraint in its application. The present inventor made various studies in order to take advantage of the features of these conventional methods and to obtain a metal-deposited film with excellent impact resistance. As a result, a film in which metal is vapor-deposited on a laminated film with a specific structure has excellent adhesion of the vapor-deposited film, printability and adhesion of the vapor-deposited surface, blocking resistance, rigidity, and processability, as well as the desired impact resistance. It was also found that the present invention was significantly improved. (Means for solving the problems) The present invention has the following configuration. A layer consisting of 70-98% by weight of a crystalline propylene copolymer with a crystal melting point of 150°C or lower and 2-30% by weight of an ethylene-based copolymer with a density of 0.930 or higher, crystals with an ethylene content of 3-30% by weight ethylene-propylene block copolymer or the crystalline ethylene-propylene block copolymer.
Layer B, which is composed of 30% by weight or less of α-olefin copolymer rubber, is laminated in three layers in an A/B/A configuration, and metal is vapor-deposited on at least one surface of layer A. Metal vapor deposited laminated film. The present invention is characterized by a metal-deposited laminated film formed by depositing a metal on at least one surface of layer A of a laminated film consisting of two or three layers of A/B/A having different compositions. The configuration will be explained in further detail. The crystalline propylene-based copolymer with a crystal melting point of 150°C or less used for layer A of the present invention is prepared by mixing propylene as a main component with ethylene or an α-olefin having 4 or more carbon atoms as a comonomer, such as Ziegler-Natsuta Copolymer. It can be obtained by copolymerization using a known stereoregular polymerization catalyst of α-olefin by a known method such as a slurry method, a solution method, or a gas phase polymerization method. Specific examples of such copolymers include ethylene/propylene random copolymer, propylene/butene-1 copolymer, ethylene/propylene/butene-1 terpolymer, and the like. Furthermore, modified copolymers obtained by modifying these copolymers with unsaturated carboxylic acids such as maleic anhydride and acrylic acid or their derivatives may be used, or mixtures thereof or ethylene/a-olefin copolymer rubber, etc. It is also possible to add a small amount of other types of polymers. However, in the present invention, the copolymer must have a crystal melting point of 150°C or less. Those with a crystal melting point exceeding 150℃ have poor heat sealing properties.
In addition, impact resistance tends to decrease, and the adhesion of the deposited film also tends to decrease, which is not preferable. An ethylene/propylene copolymer with an ethylene content of 1 to 6% by weight and a crystal melting point of 140°C or less, an ethylene content of 1 to 6% by weight, a butene-1 content of 1 to 25% by weight, Ethylene with a crystal melting point of 140℃ or less
Propylene bitene-1 terpolymers are particularly preferred in the present invention. In addition, in the A layer, 2 to 30% by weight of an ethylene polymer having a density of 0.930 or more is added to the above crystalline propylene copolymer. propylene whose main component is or α having 4 or more carbon atoms
-Includes copolymers with olefins, but the density is
Must be 0.930 or higher, preferably 0.935 or higher. If the density is less than 0.930, the rigidity and blocking resistance will be poor, and a metal-deposited laminated film with good winding shape and excellent workability cannot be obtained. The amount of the ethylene polymer added to the crystalline propylene copolymer is 2 to 30% by weight, preferably 3 to 20% by weight. If the amount added is less than 2% by weight, the effect of improving rigidity and blocking resistance will be insufficient, and if it exceeds 30% by weight, the film will tend to tear and become brittle.
Further, it is not preferable because it becomes difficult to obtain a film having a smooth surface. The crystalline ethylene/propylene block copolymer used for layer B in the present invention has an ethylene content of 3.
-30% by weight, particularly preferably 4-25% by weight. The block copolymer is a known catalyst for stereoregular polymerization of α-olefins, for example, a so-called Ziegler catalyst obtained from a solid catalyst component containing a transition metal and an organoaluminium compound, or these and an electron-donating organic compound. It is obtained by block copolymerizing propylene and ethylene using a Natsuta catalyst or the like. The solid catalyst component is known for the polymerization of propylene, and includes a trivalent or tetravalent titanium compound on a carrier such as titanium trichloride or its eutectic, or a magnesium compound (which may be treated with other compounds in advance). Alternatively, a typical example is one obtained by treating the compound with another compound. In addition, as a method for block copolymerization, multi-stage polymerization of two or three or more stages is common. For example, in the first stage, propylene is homopolymerized or propylene is copolymerized with a small amount of ethylene (or a-olefin). a method of polymerizing and then copolymerizing propylene and ethylene in a second step, a method of adding to this method a method of homopolymerizing ethylene or copolymerizing propylene in a third step, a multistage polymerization in which these steps are further increased, Generally known block copolymerization methods can be employed, such as a method in which the first and second steps are reversed. This block copolymer has a
The absorbance ratio A720/A731 between 720cm ^-1 and 731cm ^-1 is 0.5 or more, and the melt flow rate (MFR, the amount of molten resin discharged in 10 minutes when a temperature of 230℃ and a load of 2.16Kg is applied) is 0.1 to 30. is preferred. In addition, the block copolymer used for the B layer of the present invention contains 30% by weight or less of ethylene-α-olefin copolymer rubber.
Impact resistance can be further improved by preferably blending 2 to 20% by weight. This ethylene-α-olefin copolymer rubber consists of propylene, butene-1,4-methyl-
It is an amorphous or partially crystalline copolymer with an a-olefin such as 1-pentene, and may contain a small amount of a diene component such as 1,4-hexadiene or ethylidene norbornene. Of these, the ethylene content is 50
~85% by weight, propylene or butene-1 is used as the α-olefin, and the MFR obtained by copolymerizing with a vanadium catalyst is 0.5 to 30, and the ratio with the melt flow rate of the block copolymer is the same. MFR of polymer rubber/MFR of block copolymer
It is particularly preferable to select and use one in the range of 0.2 to 20. It is particularly desirable to add very specific antioxidants, inorganic fillers and other polymers to the copolymers used in the A and B layers of the present invention. That is, it has been commonly used as an additive, a plasticizer, a lubricant, a slip agent, an antistatic agent, a neutralizing agent for catalyst components, a lubricant, etc., which is normally added to films made of crystalline polypropylene resin at room temperature. Fatty acids and fatty acid derivatives such as metal salts thereof are not preferred because they not only reduce the adhesion of the vapor-deposited film but also significantly impede the printability and adhesion of the vapor-deposited surface, resulting in a decrease in performance. Even if these are used only in the core layer of the laminate of the present invention, they are not preferred because they economically migrate to the surface layer and similarly deteriorate the performance. Therefore, desirable additives are extremely limited, and heat stabilizers and
Antioxidants, inorganic fillers such as silica, zeolite, and calcium carbonate, and polymer additives such as carboxylic acid-modified polyolefin to improve adhesion are desirable. The A layer and B layer of the present invention are laminated in three layers with an A/B/A configuration. This method of laminating two types and three layers is
Melt extrusion using a total of 2 to 3 extruders, 1 to 2 extruders for the A layer and 1 extruder for the B layer, by a known method such as a feed block method or a coextrusion multilayer die method,
It is obtained by a three-layer coextrusion lamination method in which the film is laminated in a molten state in an adapter section or die, and then cooled with air, cooling water, cooling rolls, etc. to form a film. Other lamination methods, such as the extrusion lamination method in which one film is melt-extruded on the other, and the extrusion lamination method in which the films are bonded and laminated using an adhesive, require lamination on both sides, which is disadvantageous in terms of cost. Both layers A and B are individually thin films with poor slip properties, and are flexible and stretchable, so when laminated, wrinkles occur and it is difficult to obtain a uniform film. Furthermore,
The interlayer adhesion between layer A and layer B is also poor, which is undesirable in terms of both cost and performance. The A and B layers of the present invention need to be laminated in the order of A/B/A, and in the order of B/A/B, it is necessary to deposit metal on the B layer, and the adhesiveness of the deposited film is The metallic luster of the vapor-deposited surface is lost, and the heat-sealing properties and slip properties are also poor, which is a practical problem.
The thickness ratio of each layer in the A/B/A configuration of the present invention is arbitrary, but in order to provide substantially useful tear strength and impact resistance, the thickness of layer B should be 25% of the total thickness. ~
90% is desirable, especially 30-70%. The larger the thickness ratio of the B layer, the better the tear resistance and impact resistance.
The larger the thickness ratio of layer A, the better the heat sealability. After surface-treating at least one side of the A layer of the A/B/A three-layer coextruded film thus obtained, a metal is deposited under vacuum to obtain the desired metal-deposited laminated film. I can do it. This surface treatment method may be acid treatment, flame treatment, plasma treatment, corona discharge treatment, etc.
Corona discharge treatment, which can easily and continuously treat laminated films, is economically advantageous, and corona discharge treatment or plasma treatment in a specific gas atmosphere such as nitrogen, carbon dioxide, or oxygen, or while heating the film, can improve the treatment effect. It is also effective to improve If this surface treatment is not performed, the adhesive strength of the deposited film will be insufficient. The degree of surface treatment is preferably such that the wettability index measured by the method of JIS K 6768 is 35 dyn/cm or more, and 38 to 43 dyn/cm is particularly preferable. In order to strengthen the adhesion between the film and the metal, an anchor coat of an adhesive such as polyester, polyurethane, or epoxy resin may be applied to the treated surface of the film before vapor deposition. Next, any known method such as a vacuum evaporation method, a sputtering method, or an ion beam method can be used to evaporate the metal onto this A layer. Inside the vacuum evaporation equipment, the pressure inside the equipment was reduced to around 10 ^-4 Torr using an oil pump and a diffusion pump.
A container containing a desired metal such as nickel, gold, silver, etc. or a filament to which the desired metal is attached is heated to melt and evaporate the metal, and the vapor-deposited molecules are drawn out from at least one surface of layer A of the laminated film. A common method is to continuously or partially deposit the material and then wind it up. Note that aluminum is preferable as the vapor-deposited metal from the viewpoint of workability and economy, and the thickness of the vapor-deposited layer is approximately several tens to several hundreds of angstroms (Å) in view of the adhesion of the vapor-deposited film. (Effects of the Invention) The metal-deposited laminated film of the present invention is useful as a single-sided or double-sided metal-deposited film, taking advantage of its excellent impact resistance, and can be used for decoration, packaging, etc. Taking advantage of the excellent adhesion of the vapor-deposited surface, it can be top-coated or printed to protect the vapor-deposited surface, such as to prevent scratches, or to color it, or it can be coated with thermoplastic polyester resin after being anchor-coated with adhesive. By laminating stretched or unstretched films and sheets of nylon, crystalline polypropylene, etc., the rigidity and strength can be further improved, and it has many uses as a highly functional packaging material that also has barrier properties and decorative effects. It can be suitably used for. (Examples) Hereinafter, the present invention will be explained in more detail with reference to Examples and Comparative Examples. The following methods were used to measure each characteristic used in the present invention. (1) Melt flow rate (MFR): JIS K 7210
-1976, polypropylene and propylene copolymers were measured under test conditions 14 (230°C, 21.6 kg), and polyethylene and ethylene-α-olefin copolymer rubbers were measured under test conditions 4 (190°C, 2.16 kg). (2) Crystal melting point (Tm): Temperature of a 10 mg sample is raised at a rate of 10°C/min in a nitrogen atmosphere using a differential scanning calorimeter (abbreviation: DSC). It is expressed as the peak temperature (unit: °C) of the endothermic curve. (3) Wetting index: Measured on both the film surface and the vapor deposition surface using the method of JIS K 6768. (Unit: dyn/cm) (4) Impact strength: According to ASTM D 781, tested at 23℃ using a Toyo Seiki pendulum type film impact tester.
Measured under 50% humidity. (Unit: Kg・cm/cm) (5) Adhesiveness of vapor-deposited film: The vapor-deposited film was heated to 40°C.
After leaving it in a constant temperature and humidity chamber at 90% humidity for 24 hours,
Attach a 70 mm length of self-unstick tape with a width of 18 mm to the side of the vapor deposited film, then quickly peel it off by hand. Find the area percentage of the vapor deposited film that does not adhere to the adhesive tape and remains on the sample film surface as shown below. was ranked.

【表】 (6) フイルムの巻姿：一定長の金属蒸着フイルム
を連続して巻き取つて得られたフイルムロール
を肉眼で観察し、表面が平坦で“しわ”や“肥
厚（巻きこぶ）”の無いものを良好、しわまた
は肥厚があり、巻き姿が不均一のものを不良と
評価した。 (7) 蒸着面の印刷・ラミネート適性：片面に金属
蒸着したフイルムの蒸着面（金属面）と非蒸着
面を重ね合せ、１Kg／100cm²の荷重をかけて温
度40℃、相対湿度90％の雰囲気下に72時間放置
した後、蒸着面のぬれ指数（単位：dyn／cm）
を測定する。良好な印刷・ラミネート適性と評
価されるにはぬれ指数35以上が必要である。実施例１二台の押出機及び三層Ｔダイを連結した二種三
層共押出積層フイルム製造装置を用い、Ａ層用レ
ジンとしてMFR7.0、Tm140℃、エチレン含有量
が4.3重量％の結晶性エチレン・プロピレンラン
ダム共重合体94重量％及び密度0.965、MFR10.2
の高密度ポリエチレン６重量％からなる組成物
（酸化防止剤として組成物全量に対してテトラキ
ス〔メチレン（３，５−ジ−タ−シヤリー−ブチ
ル−４−ヒドロキシフエニル）プロピオネート〕
メタン0.15重量％およびブロツキング防止剤とし
て平均粒径1μのシリカ0.1重量％含む）を、また
Ｂ層用レジンとしてMFR6.5、エチレン含有量が
11.5重量％、赤外線吸収スペクトルの吸光度比、
A720／A731＝1.3の結晶性エチレン・プロピレン
ブロツク共重合体（酸化防止剤としてテトラキス
〔メチレン（３，５−ジ−タ−シヤリーブチル−
４−ヒドロキシフエニル）プロピオネート〕メタ
ン0.12重量％を含む）を、一方の押出機にＡ層用
レジンを、他方の押出機にＢ層用レジンをそれぞ
れ供給し、215℃で溶融押出し、三層Ｔダイ内で
Ａ，Ｂ層をＡ／Ｂ／Ａに積層した後エアナイフで
押圧しつつ30℃の冷却ロールで急冷し、全厚み
30μ、厚み構成7μ／16μ／7μのＡ／Ｂ／Ａの構成
からなる三層積層フイルムを得、次いでこのフイ
ルムのＡ層の一方の面にコロナ放電処理を行つた
後、巻取り、処理面のぬれ指数が41dyn／cmの片
面処理三層フイルムを得た。次に、このフイルム
をスリツターを用いて巾60cmに裁断した後、連続
真空蒸着装置にセツトし、３×10^-5mmHg以下に
保つた真空下でフイルムを連続的に繰り出しなが
ら、フイルムのコロナ放電処理したＡ層面にアル
ミニウム蒸着を施して巻き取り、蒸着膜の厚みが
0.04ミクロン（400オングストローム）、長さ
1000mのロール状に巻かれた片面蒸着三層積層フ
イルムを得た。このフイルムの衝撃強度は、127
Kg・cm／cmで後述の比較例１より格段に優れてお
り、蒸着膜の接着性はランク３、蒸着面の印刷・
ラミネート適性も、ぬれ指数40dyn／cmと良好で
あつた。比較例１実施例１のＡ層に用いたと同様の組成物を押出
機及びこれに連結したＴダイを用いて210℃で溶
融押出し、30℃の冷却ロールで急冷した後片面コ
ロナ放電処理を施した後巻取り、処理面のぬれ指
数が39dyn／cm、厚みが30μの片面処理フイルム
を得た。次に、このフイルムをスリツターを用い
て巾60cmに裁断した後実施例１に準拠して、フイ
ルムの処理面にアルミニウム蒸着を施して巻き取
り、蒸着膜の厚みが0.04ミクロン（400オングス
トローム）長さ1000mのロール状に巻かれた片面
蒸着フイルムを得た。この蒸着フイルムの蒸着膜
の接着性、蒸着面の印刷・ラミネート適性は良好
であつたが、フイルムの衝撃強度は、18Kg・cm／
cmと弱く、脆いものであつた。実施例２Ｂ層用レジンとして実施例１で用いたと同様の
結晶性エチレン・プロピレンブロツク共重合体92
重量％及びMFR3.8、エチレン含有量が78重量％
のエチレン・プロピレン共重合体ゴム８重量％か
らなる組成物を用いた以外は、実施例１に準拠し
て、フイルム厚み30μ蒸着膜の厚み0.04ミクロン
の片面蒸着三層フイルムを得た。このフイルムの
衝撃強度は206Kg・cm／cmと実施例１で得られた
蒸着フイルムより更に優れたものであつた。ま
た、1000m巻でのフイルムの巻姿は良好であり、
蒸着膜の接着性、蒸着面の印刷・ラミネート適性
も実施例１と同等で良好であつた。比較例２実施例１のＡ層用レジンのかわりに、実施例１
で用いたと同様の結晶性エチレン・プロピレンラ
ンダム共重合体（酸化防止剤、ブロツキング防止
剤は実施例１に同じ）のみからなるレジンを用い
たほかは実施例１に準拠して、片面処理三層積層
フイルムを得たが、巻き取つたフイルムのブロツ
キングが著しく、局部的に“しわ”や“巻きこ
ぶ”がみられ、このフイルムを実施例１に準拠し
て真空蒸着装置にセツトしてアルミニウム蒸着を
行つたが、蒸着厚みが一定にならず、また巻き姿
も不良で良好な蒸着フイルムが得られなかつた。実施例３Ａ層用レジンとして、MFR＝4.2、Tm＝130
℃、エチレン含有量が4.1重量％、ブテン−１含
有量が4.0重量％の結晶性エチレン・プロピレ
ン・ブテン−１三元共重合体90重量％及びエチレ
ン系重合体として密度0.935、MFR＝5.5のエチレ
ン−ブテン−１共重合体10重量％からなる組成物
（酸化防止剤として、テトラキス（２，４−ジ−
ｔ−ブチルフエニル）４，4′−ビフエニレン−ジ
フオスフオナイト0.1重量％及びブロツキング防
止剤として、平均粒径0.8μのハンドロタルサイト
0.1重量％を含む）を、またＢ層用レジンとして、
MFR＝3.8、エチレン含有量が9.4重量％、赤外線
吸収スペクトルの吸光度比A720／A731＝1.2の結
晶性エチレン・プロピレンブロツク共重合体88重
量％及びMFR＝5.1、エチレン含有量が75重量％
のエチレン−ブテン−１共重合体ゴム12重量％か
らなる組成物（酸化防止剤として１，３，５−ト
リメチル−２，４，６−トリス（３，５−ジ−ｔ
−ブチル−ヒドロキシベンジル）ベンゼン0.12重
量％を含む）とを、実施例１で用いた二種三層共
押出積層フイルム製造装置の各々の押出機に同様
に供給し、各々の押出機の吐出量調整により各層
の厚みを調整しつつ実施例１に準拠して溶融押出
し、エアナイフで押出しつつ、33℃の冷却ロール
で急冷し、全厚み25μ、Ａ／Ｂ／Ａの厚み構成が
5μ／15μ／5μの三層積層フイルムを得、次いで、
このフイルムのＡ層の一方の面に窒素（N₂）雰
囲気下でコロナ放電処理を行つた後、巻取り処理
面のぬれ指数が46dyn／cmの片面処理三層フイル
ムを得た。次に、このフイルムを、実施例１に準
拠して、連続真空蒸着装置にセツトし、Ａ層のコ
ロナ放電処理面にアルミニウム蒸着をして巻き取
り、蒸着膜の厚みが0.05μ（500オングストローム）
の片面蒸着三層積層フイルムを得た。このフイル
ムの衝撃強度は188Kg・cm／cm、1000m巻の巻姿
は良好で、蒸着膜の蒸着性はランク３、蒸着面の
印刷・ラミネート適性は、ぬれ指数44dyn／cmと
きわめて良好であつた。比較例３Ａ層用レジンとして、実施例１で用いたと同様
のエチレン含有量4.3重量％の結晶性エチレン・
プロピレンランダム共重合体94重量％およびメル
トフローレート（MFR）5.5でブテン−１含量95
重量％のエチレン・ブテン−１共重合体６重量％
からなる組成物（実施例１のＡ層と同様の酸化防
止剤およびシリカを含有）を、またＢ層用レジン
として、MFR7.0の結晶性プロピレン単独重合体
（実施例１のＢ層用レジンと同様の酸化防止剤を
含有）を用い、実施例１に準拠して三層積層のフ
イルムとし、全厚みが30μ、厚み構成が7μ／
16μ／7μのＡ／Ｂ／Ａの構成からなる三層積層フ
イルムを得た。該フイルムを実施例１に準拠して
Ａ層の一方の面にコロナ放電処理、ついで該放電
処理面に真空下にアルミニウム蒸着を施し、蒸着
膜の厚みが0.04μ（400〓）、長さ1000mのロール状
に巻かれた片面アルミニウム蒸着三層積層フイル
ムを得た。この蒸着フイルムの衝撃強度は14Kg・
cm／cmと実施例１に比して非常に弱く、かつ脆い
ものであつた。また、1000m巻での巻姿は、局部
的にシワや巻きこぶが見られ、不良であり、この
ため蒸着膜の接着性および蒸着面の印刷・ラミネ
ート適性の評価は不可能であつた。比較例４比較例３で用いたＡ層用レジンのうち、ブテン
−１含有量95重量％のエチレン・ブテン−１共重
合体６重量％に換えてMFR6.5、プロピレン含有
量が91重量％のプロピレン・ブテン−１共重合体
６重量％を用いた以外は、比較例３に準拠して片
面アルミニウム蒸着三層積層フイルムを得た。こ
の蒸着フイルムの衝撃強度は13Kg・cm／cmと非常
に弱く、かつ脆いものであり、巻姿も比較例３同
様不良で、このため蒸着膜の接着性および蒸着面
の印刷・ラミネート適性の評価は不可能であつ
た。以上の比較例３，４から明らかなように、Ａ／Ｂ／Ａタイプの未延伸三層積層フイルムに
金属蒸着した金属蒸着積層フイルムでは、単に、
Ａ層用レジンに結晶性エチレン・プロピレン共重
合体を、Ｂ層用レジンに結晶性プロピレン重合体
を用いるだけでは衝撃強度に優れ、蒸着膜の接着
性、蒸着面の印刷・ラミネート適性に優れた金属
蒸着積層フイルムは得られず、本願発明の顕著な
作用効果は明白である。[Table] (6) Film winding appearance: A film roll obtained by continuously winding a certain length of metallized film is observed with the naked eye to find that the surface is flat and there are no wrinkles or thickening (rolling bumps). Those with no wrinkles or thickening were evaluated as good, and those with wrinkles or thickening and uneven curling appearance were evaluated as poor. (7) Suitability for printing and laminating on vapor-deposited surfaces: Layer the vapor-deposited (metallic) side of a film with metal vapor-deposited on one side and the non-vapor-deposited surface, apply a load of 1 kg/100 cm ² and laminate at a temperature of 40°C and a relative humidity of 90%. After being left in the atmosphere for 72 hours, the wettability index of the deposited surface (unit: dyn/cm)
Measure. A wettability index of 35 or higher is required to be evaluated as having good printing and laminating suitability. Example 1 Using a two-type, three-layer coextrusion laminated film manufacturing device that connects two extruders and a three-layer T-die, a resin for the A layer was prepared using crystals with an MFR of 7.0, a Tm of 140°C, and an ethylene content of 4.3% by weight. 94% by weight ethylene/propylene random copolymer, density 0.965, MFR 10.2
A composition consisting of 6% by weight of high-density polyethylene (tetrakis [methylene (3,5-di-tertiary-butyl-4-hydroxyphenyl) propionate] as an antioxidant, based on the total amount of the composition)
Contains 0.15% by weight of methane and 0.1% by weight of silica with an average particle size of 1μ as an anti-blocking agent), MFR6.5 as the B layer resin, and ethylene content.
11.5% by weight, absorbance ratio of infrared absorption spectrum,
A720/A731 = 1.3 crystalline ethylene/propylene block copolymer (tetrakis [methylene (3,5-di-tert-shaributyl-
4-Hydroxyphenyl)propionate (containing 0.12% by weight of methane) was melt-extruded at 215°C by supplying the A-layer resin to one extruder and the B-layer resin to the other extruder, resulting in a three-layer After layer A and B are laminated as A/B/A in a T-die, they are pressed with an air knife and rapidly cooled with a cooling roll at 30°C to achieve the full thickness.
A three-layer laminated film having an A/B/A configuration with a thickness of 30μ and a thickness of 7μ/16μ/7μ was obtained. Next, one side of the A layer of this film was subjected to corona discharge treatment, and then wound up and the treated surface A single-sided treated three-layer film with a wettability index of 41 dyn/cm was obtained. Next, this film was cut to a width of 60 cm using a slitter, and then set in a continuous vacuum evaporation device, and while the film was continuously fed out under a vacuum maintained at 3 x 10 ^-5 mmHg or less, corona discharge of the film was performed. Aluminum vapor deposition is performed on the treated A layer surface and rolled up, and the thickness of the vapor deposited film is
0.04 micron (400 angstroms), length
A single-sided vapor-deposited three-layer laminated film wound into a roll of 1000 m was obtained. The impact strength of this film is 127
Kg・cm/cm, which is much better than Comparative Example 1 described later, the adhesion of the vapor deposited film is rank 3, and the printing and
The lamination suitability was also good with a wettability index of 40 dyn/cm. Comparative Example 1 A composition similar to that used for layer A in Example 1 was melt-extruded at 210°C using an extruder and a T-die connected to it, rapidly cooled with a cooling roll at 30°C, and then subjected to single-sided corona discharge treatment. After that, the film was wound up to obtain a single-sided treated film having a wettability index of 39 dyn/cm on the treated side and a thickness of 30 μm. Next, this film was cut to a width of 60 cm using a slitter, and then aluminum was vapor-deposited on the treated surface of the film according to Example 1, and the film was wound up to a thickness of 0.04 microns (400 angstroms). A single-sided vapor deposited film wound into a 1000 m roll was obtained. The adhesion of this vapor-deposited film and the suitability for printing and lamination on the vapor-deposited surface were good, but the impact strength of the film was 18 kg/cm/cm.
It was weak and brittle. Example 2 Crystalline ethylene/propylene block copolymer 92 similar to that used in Example 1 as resin for B layer
Weight% and MFR3.8, ethylene content 78% by weight
A single-sided deposited three-layer film having a film thickness of 30 μm and a thickness of 0.04 μm was obtained in accordance with Example 1, except that a composition consisting of 8% by weight of ethylene-propylene copolymer rubber was used. The impact strength of this film was 206 kg·cm/cm, which was even better than the vapor-deposited film obtained in Example 1. In addition, the winding appearance of the film is good when rolled at 1000m,
The adhesion of the vapor-deposited film and the suitability for printing and lamination of the vapor-deposited surface were also good and equivalent to those of Example 1. Comparative Example 2 Example 1 was used instead of the A-layer resin of Example 1.
A three-layer single-sided treatment was carried out in accordance with Example 1, except that a resin consisting only of the same crystalline ethylene-propylene random copolymer as used in Example 1 (the antioxidant and antiblocking agent were the same as in Example 1) was used. A laminated film was obtained, but the rolled film showed significant blocking, with some "wrinkles" and "rolling bumps" being observed locally.The film was then set in a vacuum deposition apparatus according to Example 1 and subjected to aluminum deposition. However, the deposited thickness was not constant and the winding appearance was also poor, making it impossible to obtain a good deposited film. Example 3 As resin for A layer, MFR=4.2, Tm=130
°C, 90% by weight of a crystalline ethylene-propylene-butene-1 terpolymer with an ethylene content of 4.1% by weight and a butene-1 content of 4.0% by weight, and an ethylene polymer with a density of 0.935 and an MFR of 5.5. A composition consisting of 10% by weight of ethylene-butene-1 copolymer (with tetrakis (2,4-di-
0.1% by weight of 4,4'-biphenylene diphosphonite (t-butylphenyl) and handrotalcite with an average particle size of 0.8μ as an antiblocking agent.
(containing 0.1% by weight), and as a resin for the B layer,
Crystalline ethylene-propylene block copolymer with MFR = 3.8, ethylene content 9.4% by weight, infrared absorption spectrum absorbance ratio A720/A731 = 1.2, 88% by weight and MFR = 5.1, ethylene content 75% by weight
A composition consisting of 12% by weight of ethylene-butene-1 copolymer rubber (1,3,5-trimethyl-2,4,6-tris (3,5-di-t) as an antioxidant)
-butyl-hydroxybenzyl) containing 0.12% by weight of benzene) was similarly supplied to each extruder of the two-type three-layer coextrusion laminated film manufacturing apparatus used in Example 1, and the discharge amount of each extruder was While adjusting the thickness of each layer, it was melt-extruded according to Example 1, extruded with an air knife, and rapidly cooled with a cooling roll at 33°C, resulting in a total thickness of 25μ and a thickness configuration of A/B/A.
A three-layer laminated film of 5μ/15μ/5μ was obtained, and then
One side of the A layer of this film was subjected to a corona discharge treatment in a nitrogen (N ₂ ) atmosphere, and then wound up to obtain a single-sided treated three-layer film with a wettability index of 46 dyn/cm on the treated side. Next, this film was set in a continuous vacuum evaporation apparatus according to Example 1, aluminum was vapor-deposited on the corona discharge treated surface of layer A, and the film was wound up so that the thickness of the vapor-deposited film was 0.05μ (500 angstroms).
A single-sided vapor-deposited three-layer laminated film was obtained. The impact strength of this film was 188 kg cm/cm, the appearance of the 1000 m roll was good, the vapor deposition property of the vapor deposited film was rank 3, and the suitability for printing and lamination of the vapor deposited surface was extremely good with a wettability index of 44 dyn/cm. . Comparative Example 3 As the A-layer resin, crystalline ethylene with an ethylene content of 4.3% by weight, similar to that used in Example 1, was used.
Propylene random copolymer 94% by weight and butene-1 content 95 with melt flow rate (MFR) 5.5
6% by weight of ethylene-butene-1 copolymer
(containing the same antioxidant and silica as the A layer of Example 1), and a crystalline propylene homopolymer with MFR7.0 (containing the B layer resin of Example 1) as the B layer resin. (contains the same antioxidant) and made a three-layer laminated film according to Example 1, with a total thickness of 30μ and a thickness composition of 7μ/
A three-layer laminated film having an A/B/A configuration of 16μ/7μ was obtained. The film was subjected to corona discharge treatment on one side of layer A according to Example 1, and then aluminum vapor deposition was performed on the discharge treated surface under vacuum, so that the thickness of the vapor deposited film was 0.04μ (400〓) and the length was 1000m. A three-layer laminated film with aluminum vapor deposited on one side was obtained which was wound into a roll. The impact strength of this vapor-deposited film is 14Kg.
cm/cm, which was very weak and brittle compared to Example 1. In addition, the appearance of the 1000 m roll was poor, with wrinkles and curls observed locally, making it impossible to evaluate the adhesion of the deposited film and the suitability for printing and lamination of the deposited surface. Comparative Example 4 Among the A-layer resins used in Comparative Example 3, MFR6.5 and propylene content of 91% by weight were used instead of 6% by weight of ethylene-butene-1 copolymer with a butene-1 content of 95% by weight. A three-layer laminated film with aluminum evaporated on one side was obtained in accordance with Comparative Example 3, except that 6% by weight of the propylene-butene-1 copolymer was used. The impact strength of this vapor-deposited film was very weak at 13 kg/cm/cm, and it was brittle, and the roll appearance was also poor as in Comparative Example 3. Therefore, it was difficult to evaluate the adhesion of the vapor-deposited film and the suitability for printing and laminating the vapor-deposited surface. was impossible. As is clear from the above Comparative Examples 3 and 4, the metal-deposited laminated film in which metal is deposited on the A/B/A type unstretched three-layer laminated film simply has the following properties:
Simply using a crystalline ethylene-propylene copolymer for the resin for the A layer and a crystalline propylene polymer for the resin for the B layer will result in excellent impact strength, adhesion of the vapor deposited film, and excellent suitability for printing and lamination on the vapor deposition surface. A metal vapor-deposited laminated film was not obtained, and the remarkable effects of the present invention are obvious.

[Brief explanation of the drawing]

第１図は本願発明の金属蒸着積層フイルムの構
成例を示す断面図である。図中ＡはＡ層を、Ｂは
Ｂ層を、Ｍは金属蒸着層を示す。またイは片面全
面金属蒸着フイルムを、ロは両面全面金属蒸着フ
イルムを、ハは片面部分金属蒸着フイルムを、ニ
は片面全面、片面部分金属蒸着フイルムをそれぞ
れ示す。 FIG. 1 is a cross-sectional view showing an example of the structure of the metal vapor-deposited laminated film of the present invention. In the figure, A indicates the A layer, B indicates the B layer, and M indicates the metal vapor deposition layer. In addition, ``A'' indicates a metal-deposited film on one side entirely, ``B'' indicates a metal-deposited film on both sides, ``C'' indicates a partially metal-deposited film on one side, and ``D'' indicates a film with metal evaporation on one side entirely and partially on one side.

Claims

[Scope of Claims] 1. A layer consisting of 70 to 98% by weight of a crystalline propylene copolymer having a crystal melting point of 150°C or less and 2 to 30% by weight of an ethylene polymer having a density of 0.930 or more, with an ethylene content of 3 ~30% by weight of crystalline ethylene/propylene block copolymer or the crystalline ethylene/propylene block copolymer with ethylene-
Layer B, which contains 30% by weight or less of α-olefin copolymer rubber, is laminated in three layers in an A/B/A configuration, and metal is vapor-deposited on at least one surface of layer A. Metal vapor deposited laminated film. 2. The metal-deposited laminated film according to claim 1, wherein the lamination of the A/B/A configuration is performed by a coextrusion lamination method. 3. The metal vapor deposited laminated film according to claim 1, wherein the A layer and the B layer do not substantially contain fatty acids or derivatives thereof. 4 The crystalline propylene-based copolymer is an ethylene-propylene random copolymer with an ethylene content of 1 to 6% by weight and a crystal melting point of 140°C or less, or an ethylene-propylene random copolymer with an ethylene content of 1 to 6% by weight, butene-1
The metal vapor deposited laminated film according to claim 1, which is an ethylene-propylene-butene-1 ternary copolymer having a content of 1 to 25% by weight and a crystal melting point of 140°C or less. 5 The ethylene polymer is an ethylene homopolymer with a density of 0.935 or more, ethylene and α- with a carbon number of 3 or more
The metal-deposited laminated film according to claim 1, which is a copolymer with olefin. 6 B layer is 720cm in infrared absorption spectrum ^-
Crystalline ethylene/propylene block copolymer 98~ with an absorbance ratio A720/A731 of ¹ and 731 cm ^-1 of 0.5 or more
The metal-deposited laminated film according to claim 1 or 2, which is a layer comprising a composition of 80% by weight of ethylene/α-olefin copolymer rubber and 2 to 20% by weight of ethylene/α-olefin copolymer rubber. 7. The metal vapor deposited laminated film according to claim 1, wherein the metal used for metal vapor deposition is aluminum.