JPS60172637A - Drawing wiping can - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明は、絞シしどき罐に関するもので、より詳細には
、分子配向されたポリエステルの被膜を鑵内面に密着し
た状態で備えた絞シしどき端に関する。本発明は、特に
内面被膜の密着性、耐腐食性及びフレーバー特性に優れ
た内面被覆絞シしどき罐に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crimped can, and more particularly to a crimped end having a molecularly oriented polyester coating in close contact with the inner surface of the chisel. The present invention particularly relates to an inner-coated, squeezed can with excellent inner coating adhesion, corrosion resistance, and flavor characteristics.

従来、ポリブチレンテレフタレート等の熱可塑性ポリエ
ステルのフィルム全鋼板等の金属素材に熱接着させ、こ
の被覆金属構造物全絞シ加工或いは絞シしどき加工等に
付して、容器蓋や容器とすることは既に知られている。Conventionally, a film of thermoplastic polyester such as polybutylene terephthalate is thermally bonded to a metal material such as a full steel plate, and the coated metal structure is subjected to a full drawing process or a drawing process to form a container lid or container. That is already known.

しかしながら、公知の方法で製造される絞９容器は、絞
シ比が１．５程度の皿状乃至カップ状の浅絞シ容器であ
ｐｌまたしごき加工容器と言われるものでも、しごき率
が２０％程度の加工の程度の概して低いものであり、現
在ビール鑵や炭酸飲料鑵に使用されるような罐高さが１
００乃至２６０順でしごき率が６０％以上の高しごき率
の絞りしごきＷ’Ａ’ｃ製造するのに適用することは到
底困難であった。However, the drawn 9 container manufactured by a known method is a plate-shaped or cup-shaped shallow drawn container with a drawing ratio of about 1.5, and even if it is called an ironing container, the drawing ratio is 20. Generally, the degree of processing is low, on the order of 1.5%, and the height of the can is 1.5%, which is currently used for beer and carbonated beverages.
It was extremely difficult to apply this method to the production of drawn and ironed W'A'c with a high ironing rate of 60% or more in the order of 00 to 260.

更に、このようなフィルム被０金属素材全絞フしどき成
形して成る容器に２いては、フィルム層と金属素材との
密着性が経時によジ著しく低下し、両者の界面での剥離
が容易に進行するようになる。Furthermore, in such a container made by completely drawing and forming a metal material covered with a film, the adhesion between the film layer and the metal material deteriorates significantly over time, and peeling occurs at the interface between the two. It will progress easily.

この傾向はしごき加工の程度が大きくなるにつれて一層
顕著に光われるようになる。This tendency becomes more noticeable as the degree of ironing increases.

エチレンテレフタレート単位を生体とする熱可塑性ポリ
エステルは、ポリブチレンテレフタレート等の他のポリ
エステルに比して優れた機械的性＊’に’ｆｆするにも
かかわらず、絞シしどき加工用の被覆金属素材の用途に
用いられていないのは、甚だ奇異な感を与えるが、これ
はしごき加工のような苛酷な加工には、樹脂の配向に関
して考慮が払われていなかったために、充分なバリヤー
性や経時密着性が得られなかったと考えられる。Thermoplastic polyester, which has ethylene terephthalate units as its biological body, has superior mechanical properties*' compared to other polyesters such as polybutylene terephthalate, but it is still used as a coated metal material for drawing and stamping processing. It seems very strange that it has not been used in applications such as ironing, but this is because no consideration was given to the orientation of the resin during harsh processing such as ironing, so it is difficult to obtain sufficient barrier properties or aging properties. It is thought that adhesion could not be obtained.

本発明者等は、金属素材とポリエステルフィルムとを密
着させたものを、絞りしどき加工に付する場合、該フィ
ルムにむしろ積極的に分子配向を与えることによシ、金
属素材とフィルムとの経時密着性が顕著に向上し、諸物
件に優れた内面被覆絞りしどき罐が得られることを見出
した。The present inventors have discovered that when a metal material and a polyester film are brought into close contact with each other and subjected to a drawing process, it is possible to improve the bond between the metal material and the film by positively imparting molecular orientation to the film. It has been found that the adhesion over time is significantly improved, and it is possible to obtain inner-coated draw-sealed cans that are excellent for various objects.

即ち、本発明の目的は、分子配向されたポリエステルの
内面被膜を備えた絞シしどき鑵ヲ提供する［ある。SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a drawing iron having an inner coating of molecularly oriented polyester.

本発明の他の目的は、内面被膜の経時密着性、耐腐食性
及びフレーバー特性に優れた内面被覆絞シしどき罐全提
供するにある。Another object of the present invention is to provide an inner-coated can with excellent adhesion over time, corrosion resistance, and flavor characteristics.

本発明の更に他の目的は、端内面のポリエステル被覆層
が絞ジしどき加工による金属の薄肉化と共に分子配向さ
れ、その結果として経時的に優れた被膜密着性及び耐腐
食性とが得られる絞シしどき罐を提供するにある。Still another object of the present invention is that the polyester coating layer on the inner surface of the end is molecularly oriented while the metal is thinned by the drawing process, and as a result, excellent film adhesion and corrosion resistance are obtained over time. It is to provide a squeezed can.

本発明によれば、樹脂被覆金属素材の絞シしどき加工に
より形成された絞りしどき罐であって、この罐は金属素
材の少なくとも端内面となる側に密着下地層を介して密
着されたエチレンテレフタレート単位を主体とする熱可
塑性ポリエステルの被膜を有し、儒の側壁部において、
金属素材は下記式 ｔｏは自底部被貴金属素材の厚み、ｔｌは側壁部被覆金
属素材の厚みを夫々示す、で定義される総しごき”＄（
Ｒ）が６０乃至８５％となるように薄肉化されていると
共に、側壁部のポリエステル被膜は下記式 式中、Ｈは該被膜をＸ線回折に付したときの罐円周方向
及びポリエステル被膜光面に平行にＸ線”ｌ（照射して
得られる結晶面＋１００）干渉の頂上回折強度曲線から
めた半価中を衣わす、 で定義される配向度げＣ）が２５〜９０％となるように
分子配向されていることを特徴とする耐腐食性に優れた
絞りしごき罐が提供される。なお、本発明の配向度に関
しては、回転対陰極型強力Ｘ綴発生装置ＩＣｗ−Ｋａ、
Ｎ１−ｆｉｌｔｅｒ）を使用し、出力４０ＫＶ、５０ｍ
ＡでＸ線回折強度を良く反映する条件下で写真撮影を行
って得たものである。According to the present invention, there is provided a drawn-sealed can formed by drawing-sealed processing of a resin-coated metal material, and the can is tightly adhered to at least the end inner surface of the metal material via an adhesive base layer. It has a thermoplastic polyester coating mainly composed of ethylene terephthalate units, and on the side wall of the
The metal material is thoroughly ironed as defined by the following formula: to represents the thickness of the precious metal material at the bottom, and tl represents the thickness of the metal material covering the side wall.
The polyester coating on the side wall is thinned so that R) is 60 to 85%, and the polyester coating on the side wall is expressed by the following formula, where H is the can circumferential direction and the polyester coating light when the coating is subjected to X-ray diffraction. X-ray parallel to the surface (crystal plane obtained by irradiation + 100) Interfering with the half value determined from the top diffraction intensity curve of interference, so that the degree of orientation C) defined by is 25 to 90%. A drawing and ironing can with excellent corrosion resistance is provided, which is characterized by molecular orientation.In addition, regarding the degree of orientation of the present invention, the rotating anticathode type strong X-shaped generator ICw-Ka,
N1-filter), output 40KV, 50m
A photograph was taken under conditions that well reflect the X-ray diffraction intensity.

本発明を、添付面図に示す具体例に基づき以下に詳細に
説明する。The present invention will be explained in detail below based on specific examples shown in the accompanying drawings.

本発明に用いる被覆金属素材を示す第１図において、こ
の被覆金属素材１は、金属素材２とポリエステル樹脂層
３とから成っている。このポリエステル樹脂層６は、金
属素材２に対して熱接着されているのであるが、第１図
に示す具体例では、この樹脂層６は、密着下地層４を介
して金属素材２に接着されている。また、この具体例で
は、金属素材２の容器内面となるべき面にのみポリエス
テル樹脂層６が設けられているが、容器外面となるべき
面にもポリエステル樹脂層６が設けられていてもよい。In FIG. 1 showing a coated metal material used in the present invention, the coated metal material 1 is composed of a metal material 2 and a polyester resin layer 3. This polyester resin layer 6 is thermally bonded to the metal material 2, and in the specific example shown in FIG. ing. Furthermore, in this specific example, the polyester resin layer 6 is provided only on the surface of the metal material 2 that should become the inner surface of the container, but the polyester resin layer 6 may also be provided on the surface that should become the outer surface of the container.

金属素材２としては、従来絞シしどき罐の製造に使用さ
れている金属素材は全て使用でき、例えばブラックプレ
ート（次面未処理鋼板）、表面処理鋼板、或いはアルミ
ニウム板の如き軽金属板が全て使用される。表面処理鋼
板の適当な例は、リン酸処理及び／又はクロム酸処理等
の化学処理を行った鋼板；電解クロム酸処理鋼板等の化
成処理鍋板；錫メッキ鋼板、亜鉛メッキ鋼板、ニッケル
メッキ鉛板、アルミニウムメッキ鋼板等のメッキ処理鋼
版を挙げることができる。−１：た、錫メッキ鋼板は、
電解メッキ全施したま１のノーリフロー板（マット板ン
でもよいし、電解メッキ後溶融処理を行ったりフロー板
（ブライト板）でもよい。As the metal material 2, all the metal materials conventionally used in the production of squeezed cans can be used, such as black plates (untreated steel plates), surface-treated steel plates, or light metal plates such as aluminum plates. used. Suitable examples of surface-treated steel sheets include steel sheets that have been chemically treated such as phosphoric acid treatment and/or chromic acid treatment; chemically treated pot sheets such as electrolytic chromic acid treated steel sheets; tin-plated steel sheets, galvanized steel sheets, and nickel-plated lead. Examples include plated steel plates such as plates and aluminum plated steel plates. -1: The tin-plated steel plate is
It may be a no-reflow board (matte board) that has been completely electrolytically plated, or it may be a flow board (bright board) that undergoes melting treatment after electrolytic plating.

金属素材の厚みは、罐の太きさや、しごき加工の程度に
よっても相違するが、一般的に己って０．０５乃至２．
５ｍｍ、特に肌１乃至１．０ｍｍの厚みを有するものが
よい。The thickness of the metal material varies depending on the thickness of the can and the degree of ironing, but it generally ranges from 0.05 to 2.
It is preferable to have a thickness of 5 mm, especially 1 to 1.0 mm.

本発明において、樹脂被覆層として、エチレンテレフタ
レート単位を主体とする熱可塑性ポリエステルを使用す
る。このポリエステルとしては、ポリエチレンテレフタ
レートの他に、エステル反復単位の７０％以上、特に９
０％以上がエチレンテレフタレート単位から成力、他に
、イン７タル酸、ナフタレンジカルボン酸、２．２−ビ
ス（４−カルポキシフエニル）プロパン、ヘキサヒドロ
テレフタル酸、アジピン酸、セパチン酸等の他の二塩基
酸；プロピレングリコール、ブタンジオール、ネオペン
チルグリコール、キシリレングリコール、ヘキサヒドロ
キシリレングリコール、ジエチレングリコール、トリエ
チレングリコール、ヘキサメチレングリコール等の他の
グリコール類；ｐ−オキシ安息香酸、カプロラクトン等
のオキシカルボン戚成分等から誘導される改質用エステ
ル単位を含むコポリエステルが使用される。In the present invention, a thermoplastic polyester containing ethylene terephthalate units as a main component is used as the resin coating layer. In addition to polyethylene terephthalate, the polyester may contain at least 70% of the ester repeating units, especially 9
0% or more is derived from ethylene terephthalate units, and in addition, in-7thalic acid, naphthalene dicarboxylic acid, 2,2-bis(4-carpoxyphenyl)propane, hexahydroterephthalic acid, adipic acid, cepatic acid, etc. Other dibasic acids; other glycols such as propylene glycol, butanediol, neopentyl glycol, xylylene glycol, hexahydroxylylene glycol, diethylene glycol, triethylene glycol, hexamethylene glycol; p-oxybenzoic acid, caprolactone, etc. Copolyesters containing modifying ester units derived from oxycarbonyl-related components and the like are used.

このポリエステル樹脂は、フィルムを形成し得る分子ｉ
ｔ−を有するべきであシ、一般にオルトクロロフェノー
ル中で１．Ｏ？／１００−の濃度及び６０℃で測定して
０．７乃至２．８の範囲の固有粘度を有することが望ま
しい。This polyester resin contains molecules i that can form a film.
t-, generally 1. in orthochlorophenol. O? It is desirable to have a concentration of /100- and an intrinsic viscosity in the range of 0.7 to 2.8, measured at 60°C.

本発明に用いるポリエステル樹脂の他の被０用樹脂には
認められない幾つかの特徴を有している。The polyester resin used in the present invention has several characteristics that are not found in other resins for use.

先ず、このポリエステル樹脂はそれ自体強度及び伸び等
の機械的性質に優れていると共に、延伸による分子配向
の効果が最も太きい。即ち、分子配向によｐ剛性、バリ
ヤー性、耐熱性の向上が顕著である。First, this polyester resin itself has excellent mechanical properties such as strength and elongation, and the effect of molecular orientation by stretching is the greatest. That is, molecular orientation significantly improves p-rigidity, barrier properties, and heat resistance.

丑た、このポリエステルは金属腐食成分に対するバリヤ
ー性が犬であると共に、エステル反復単位から成るにも
かかわらず、この種の樹脂としては吸水率が小さく、Ａ
ＳＴＭ　Ｄ５７０−６３（２３℃で２４時間〕で測定し
た吸水率が１５％以下である。Moreover, this polyester has poor barrier properties against metal corrosive components, and although it is composed of ester repeating units, it has a low water absorption rate for this type of resin, and has a low water absorption rate for this type of resin.
Water absorption measured by STM D570-63 (24 hours at 23°C) is 15% or less.

更に、ポリエステル樹脂は、種々の樹脂の中でもフレー
バー（香味）４￥性に優れたもので、轍内容物に対し異
味異臭を与えることがなく、またポリオレフィンのよう
に悪臭成分を製造工程で吸着することかない。しかも、
このポリエステル樹脂は、均斉な分子量分布を有し、熱
硬化型樹脂塗料のように樹脂中の低分子量成分が内容物
中に溶出乃至抽出されることなく、衛生的特性にも顕著
に優れている。Furthermore, polyester resin has excellent flavor (flavor) properties among various resins, does not impart any off-taste or odor to the contents of the rut, and unlike polyolefin, it adsorbs malodorous components during the manufacturing process. That's not true. Moreover,
This polyester resin has a uniform molecular weight distribution, and unlike thermosetting resin paints, low molecular weight components in the resin are not eluted or extracted into the contents, and it also has outstanding hygienic properties. .

ポリエステル樹脂層の厚みも、しごき加工の程度によっ
て相違するが、一般的に言って、５乃至１０００ミクロ
ン、特に１０乃至５００ミクロンの厚みを有することが
望ましい〇 密着下地層４は、ポリエステル樹脂層乙の金属素材２へ
の電着性を向上させるものであシ、例えば、金属素材２
自体に施されているクロメート層、リン酸処理層、チタ
ネート層の無機酸化物層や、ウレタン接着剤層、エポキ
シ接着剤層、コポリエステル系或いはポリエステルエー
テル系の接着剤層、更には無機酸化物層と接Ｍ剤層との
組合せが挙げられる。The thickness of the polyester resin layer also varies depending on the degree of ironing, but generally speaking, it is desirable to have a thickness of 5 to 1000 microns, particularly 10 to 500 microns. The adhesive base layer 4 is the polyester resin layer B. It improves the electrodepositivity of the metal material 2 onto the metal material 2. For example, the metal material 2
Inorganic oxide layers such as chromate layer, phosphoric acid treatment layer, and titanate layer, urethane adhesive layer, epoxy adhesive layer, copolyester-based or polyester ether-based adhesive layer, and even inorganic oxide Combinations of layers and contact layers may be mentioned.

被俊金属素材１を製造するために、金属素材２に対して
ポリエステル樹脂層６全接着させる。この接着は、ポリ
エステル樹脂層自体を、密着下地としての無機酸化物層
を介して直接熱接着させることによシ行われ、或いは前
述した接着剤層を介して行うことができる。In order to manufacture the torn metal material 1, the entire polyester resin layer 6 is bonded to the metal material 2. This adhesion can be performed by directly thermally adhering the polyester resin layer itself through an inorganic oxide layer as an adhesion base, or it can be performed through the above-mentioned adhesive layer.

この被覆金属素材においては、ポリエステル樹脂層が金
属素材に強固に接着されていることが必要であり、一般
的に言って、その接着強度は０．５稽／ｃｍ以１、特に
１．０ｋｌｌＪ／の以上であることが、高度のしごき加
工を行う上で必要である。In this coated metal material, it is necessary that the polyester resin layer is firmly adhered to the metal material, and generally speaking, the adhesive strength is 0.5 klJ/cm or more, particularly 1.0 kllJ/cm. It is necessary for high-level ironing to be at least .

ｗｌｌ金金属素材製造する上で、注意しなければならな
い他の点は、ポリエステル樹脂層の延伸による分子配向
を可能にするために、この製造工程に２けるポリエステ
ル樹脂の球晶の生長を可及的に抑制することである。即
ち、この工程でポリエステル樹脂の　球晶　が過度に生
じている場合には、しごき工程での樹脂層の延伸が困彪
にな９、破断、剥離、クラック発生等のトラブルを生じ
るようになる。このために、例えば熱接着後の被狼素材
は、急冷して、樹脂層が過冷却状態にあるようにするの
がよい。筐だ、樹脂層が結晶化温度を溶融−固化の段階
で急速に通過するようにする。Another point that must be kept in mind when manufacturing gold metal materials is that the growth of spherulites in the polyester resin during this manufacturing process is allowed to occur in order to enable molecular orientation by stretching the polyester resin layer. It is to suppress the situation. That is, if excessive spherulites are formed in the polyester resin in this step, it becomes difficult to stretch the resin layer in the ironing step, and problems such as breakage, peeling, and cracking occur. For this purpose, for example, it is preferable to rapidly cool the material after thermal bonding so that the resin layer is in a supercooled state. The housing allows the resin layer to rapidly pass through the crystallization temperature during the melting-solidification stage.

本発明において、ポリエステル樹脂層としてＴ−ダイ法
で製造された、結晶化度が低く、未配向のフィルムを用
いることができる。また、このポリエステル樹脂層とし
ては、配向による微結晶音生じたもの、例えば既に一軸
延伸或いは二軸延伸で配向されたポリエステルフィルム
を用いることもできる。例えば、二軸延伸によシ配向さ
れたポリエチレンテレフタレートフィルムを、この樹脂
層として用いると、面内配向度が低下し、しごき方向へ
の一軸配向がより大きく生じるようになる。In the present invention, an unoriented film with low crystallinity manufactured by the T-die method can be used as the polyester resin layer. Moreover, as this polyester resin layer, a material in which microcrystalline sound occurs due to orientation, such as a polyester film already oriented by uniaxial stretching or biaxial stretching, can also be used. For example, if a polyethylene terephthalate film oriented by biaxial stretching is used as this resin layer, the degree of in-plane orientation will decrease and uniaxial orientation in the ironing direction will occur more greatly.

本発明によれば、このようにして製造された成形用の被
０金属素材１を、ポリエステル樹脂層乙の適性延伸温度
において、ポンチとダイスとの間で絞シしどき加工に付
する。この絞りしどき加工で、被０金属素材はカップ状
の無継目筒体の形に絞り成形されると共に、側壁部が薄
肉化されることによってしごき加工が行われる。本発明
においては、この際樹脂層が適性延伸温度に保持される
ことによシ、樹脂層に顕著な分子配向が与えられ、この
分子配向により樹脂層の諸物性が顕著に向上するのであ
る。また樹脂層の金」素材に対する経時密着性乃至接着
性が顕著に向上するのみならず、罐としての耐腐食性も
顕著に向上する。この経時＠着性及び耐腐食性の向上は
、顕著であや、例えば常温でのしごき成形では、１分程
度の放置で、フィルムの剥離が既に発生するのに対して
、本発明による成形では、内容物充填、長期の保存後に
も、このような剥離は殆んど認められない。According to the present invention, the thus produced metal material 1 for molding is subjected to a drawing process between a punch and a die at an appropriate stretching temperature for the polyester resin layer B. In this drawing process, the metal material to be treated is drawn into the shape of a cup-shaped seamless cylinder, and the side wall portion is thinned and ironed. In the present invention, by maintaining the resin layer at an appropriate stretching temperature, remarkable molecular orientation is imparted to the resin layer, and this molecular orientation significantly improves various physical properties of the resin layer. In addition, not only the adhesiveness of the resin layer to the gold material over time is significantly improved, but also the corrosion resistance of the can is significantly improved. This improvement in adhesion and corrosion resistance over time is remarkable; for example, in ironing molding at room temperature, peeling of the film already occurs after about 1 minute, whereas in molding according to the present invention, Even after filling with contents and long-term storage, such peeling is hardly observed.

絞りしごき罐、即ち側面無継目金属餞の加工の順序全説
明するための添付図面法２−Ａ図において、先ず、前述
した成形用素材１を、円板の形状に打抜く（第１工程−
剪ＦｆｊＴ）。この被覆金属素材１の大きさは、後述す
る絞９比やしごき’４に考慮して、最終容器に必要な金
属素材が確保嘔れるように決定する。In Figure 2-A of the attached drawing method for explaining the entire processing sequence of a drawing and ironing can, that is, a seamless side metal bar, first, the above-mentioned molding material 1 is punched into a disc shape (first step -
Shear FfjT). The size of the coated metal material 1 is determined so as to ensure the metal material necessary for the final container, taking into consideration the drawing ratio and ironing '4, which will be described later.

次いで第２−Ｂ図に示す絞９工程で、剪断された素材を
、絞ｐダイス５とポンチ６との間で絞シ加工し、浅絞ｐ
されたカップ状成形物７に成形する。絞りダイス５とポ
ンチ６とのクリアランスは、前述した被覆金属素材１の
肉厚にほぼ等しいか或いはこれよシ若干大きい。本発明
の被覆金属素材を用いる場合、下記式 ％式％） 式中りは剪断した被覆金属素材の最小径であり、ｃｔは
ポンチの最小径である、 で定義される絞シ比Ｒ１）は、金属素材の種類によって
もかな９相違するが、実用的には一段では１．１乃至６
．０、好適には１．２乃至２．８の範囲にあるのがよい
。Next, in the drawing step 9 shown in Fig. 2-B, the sheared material is drawn between the drawing die 5 and the punch 6, and shallow drawing
The molded product 7 is molded into a cup-shaped molded product 7. The clearance between the drawing die 5 and the punch 6 is approximately equal to or slightly larger than the thickness of the coated metal material 1 described above. When using the coated metal material of the present invention, the drawing ratio R1) defined by the following formula (% formula %) is the minimum diameter of the sheared coated metal material, ct is the minimum diameter of the punch, , it varies depending on the type of metal material, but in practical terms it is 1.1 to 6.
．． 0, preferably in the range of 1.2 to 2.8.

次いで、第１段の絞り工程で得られたカップ状成形物７
を、第２−Ｃ図に示す再校多工程において、より小径の
再校シダイス８と再収ｐポンチ９との間で再絞り力日工
し、深絞りされたカップ状成形物１０に成形する。勿論
、この再校多工程における絞夛比、即ちカップ状成形物
７の径と再校シポンチ９の径との比も、絞り工程におい
て前述した値の範囲内にあることが多くの場合必要であ
る。Next, the cup-shaped molded product 7 obtained in the first stage drawing step
In the recalibration multi-step shown in Fig. 2-C, redrawing force is applied between a recalibration die 8 of a smaller diameter and a reconsolidation punch 9, and a deep drawn cup-shaped molded product 10 is formed. do. Of course, in many cases it is necessary that the drawing ratio in this multiple recalibration process, that is, the ratio of the diameter of the cup-shaped molded product 7 to the diameter of the recalibration tip 9, is within the range of the values mentioned above in the drawing process. be.

再校シポンチ９と再絞りダイス８との間のクリアランス
は、被覆金属素材１の厚さと実質的に等しくして素材に
しごきが加わらないようにすることができ、或いは前記
クリアランスを被覆金属素材１の厚さよりも小さくして
素材に若干のしごきが加わるようにすることもできる。The clearance between the recalibration punch 9 and the redraw die 8 can be made substantially equal to the thickness of the coated metal stock 1 to avoid straining the stock, or the clearance can be made substantially equal to the thickness of the coated metal stock 1 to avoid straining the stock It is also possible to make the thickness smaller than the thickness of , so that the material is slightly strained.

この絞り加工或いは再校シ加工には、通常使用されてい
る潤滑剤を用いることもできる。また再校シ加工で形成
された絞シ成形物を、６段目の絞り加工に賦してよｐ深
絞シされた成形物とすることもできる。A commonly used lubricant can also be used for this drawing or recalibration process. Further, the drawn product formed by the reproof drawing process can be subjected to a sixth stage drawing process to form a deep drawn product.

第２−Ｂ図の絞シ工程で得られたカップ状成形物７及び
第２−０図で得られたカップ状成形物１０をしごき加工
に賦する。即ち、第２−Ｄ図において、しごきポンチ１
１の移動路に沿って、榎数個のしごきダイス１２（図面
では１個のみが示されている）が配置され、カップ状成
形物７或いは１０の側壁部がしごきポンチ１１としごき
ダイス１２との間でしごき加工される。しごきダイス１
２としごきポンチ１１とのクリアランスは、被覆金属素
材の肉厚よシも小であシ、従ってカップ状成形物の側壁
１６はしごきダイス１２との噛み合いにより延伸され薄
肉化される。The cup-shaped molded product 7 obtained in the drawing step of FIG. 2-B and the cup-shaped molded product 10 obtained in FIG. 2-0 are subjected to ironing. That is, in FIG. 2-D, the ironing punch 1
Several ironing dies 12 (only one is shown in the drawing) are arranged along the movement path of the cup-shaped molded product 7 or 10, and the side wall of the cup-shaped molded product 7 or 10 is connected to the ironing punch 11 and the ironing die 12. It is ironed between. Shigoki dice 1
2 and the ironing punch 11 is smaller than the wall thickness of the coated metal material. Therefore, the side wall 16 of the cup-shaped molded product is stretched and thinned by engagement with the ironing die 12.

この場合、下記式 式中、ｔｏは罐底部：被覆・金属素材、厚みであシ、ｊ
ｌは側壁部范双な瀉曹穿被覆金属素材厚みである、 で定義されるしごき率１１ｔ）は、金属素材の種類や、
配向性樹脂被覆層の厚みによっても相違するが、一般的
に言って一段のしごきで、１０乃至５０％、全体として
のしごきで３０乃至８５％の範囲にあるのが望ましい。In this case, in the formula below, to is the bottom of the can: coating/metal material, thickness, j
l is the thickness of the metal material covering the side wall with a smooth perforation, and the ironing rate (11t) defined by is the type of metal material,
Although it varies depending on the thickness of the oriented resin coating layer, generally speaking, it is desirable that the ironing rate is in the range of 10 to 50% for one stage of ironing, and 30 to 85% for the entire ironing.

本発明においては、少くともこのしごき工程、好適には
絞シ工程としごき工程との全部を、ポリエステル樹脂フ
ィルム層に分子配向を与えるため、その適性延伸温度に
おいて行う。ポリエステルフィルムの適性延伸温度とし
ては、４０乃至１００℃の温度、特に４５乃至９０℃の
温度が好ましい。In the present invention, at least this ironing step, preferably all of the drawing step and ironing step, are performed at an appropriate stretching temperature in order to impart molecular orientation to the polyester resin film layer. The suitable stretching temperature for the polyester film is preferably 40 to 100°C, particularly 45 to 90°C.

既に指摘した如く、シごき加工の温度が常温のように、
ポリエステルフィルムの延伸温度よりも低い場合には、
本発明の場合に比して、フィルム層自体に有効な分子配
向を与えることが困難であると共に、金属素材との＠着
性や、耐腐食性も著しく劣るようになる。１だ、このし
ごき加工全ポリエステルフィルムの適性延伸温度よりも
高い温度で行う場合にも、フィルム層自体に有効な分子
配向を与えることが困難であり、かえって結晶化等によ
り加工性が低下して、破断、剥離等のトラブルが生じる
ことになる。As already pointed out, the ironing process temperature is like room temperature,
If it is lower than the stretching temperature of polyester film,
Compared to the case of the present invention, it is difficult to impart effective molecular orientation to the film layer itself, and the adhesion to metal materials and corrosion resistance are also significantly inferior. 1. Even when this ironing process is carried out at a temperature higher than the appropriate stretching temperature for an all-polyester film, it is difficult to impart effective molecular orientation to the film layer itself, and the processability may deteriorate due to crystallization etc. , causing problems such as breakage and peeling.

本発明に２いて、ポリエステルフィルムｆｆ１Ｋ付与さ
れる分子配向は、しごき方向に２ける一軸分子配向であ
シ、その配向の程度はしごき率と延伸温度に大きく関係
するものである。この分子配向の程度は、下記式 式中、Ｈは該被膜ｋＸ線回折に付したときの儲円局方向
及びポリエステル被膜表面Ｃ行にＸ線を照射して得られ
る結晶面（１００）干渉の環上回折強度曲線からめた半
価［１コを表わす、 で定義される配向度げＣ）が２５〜９０％、特に６５％
〜９０％となるようなものであることが望ましい。In the second aspect of the present invention, the molecular orientation imparted to the polyester film ff1K is uniaxial molecular orientation in the ironing direction, and the degree of orientation is largely related to the ironing rate and stretching temperature. The degree of this molecular orientation is determined by the following formula, where H is the direction of the circular axis when the coating is subjected to kX-ray diffraction and the (100) interference of the crystal plane obtained by irradiating X-rays to the C row on the surface of the polyester coating. The half value [represents 1, defined as C) calculated from the ring diffraction intensity curve is 25 to 90%, especially 65%.
It is desirable that the ratio be 90%.

本発明によれば、被膜の密着性及び耐腐食性に優れた内
面被覆絞りしごき罐が容易に得られるばかシではなく、
成形中乃至は成形後における金属素材の発錆等が有効に
防止され、更に成形後の蛾に塗膜密着性向上の後処理全
行い、或いは個々の備の内部にスプレー塗装を行う煩し
さが解消される等極めて多くの利点がある。According to the present invention, an internally coated drawing can with excellent film adhesion and corrosion resistance can be easily obtained, and
This effectively prevents metal materials from rusting during and after molding, and eliminates the hassle of having to perform post-treatment to improve paint film adhesion after molding, or spray painting the inside of each piece. There are many advantages such as eliminating the problem.

本発明を次の例で説明する。The invention is illustrated by the following example.

実施例１゜ 軟鋼板（板厚：　Ｑ、　１２６ｍ＋＋ｈテンパー：Ｔ−
１）鋼種ニアルミキルド】の両面に５９／ｍ２のニッケ
ルメッキ音節し、さらに片面（フィルム被覆面）にクロ
メート処理を施したメッキ金属素材ｆｔ３１０℃１で加
熱し、該加熱金属素材に、ポリエチレンテレフタレート
樹脂（分子量：２万５千）金製膜化してなるフィルム（
厚み：６１μｍ１配向度：０％）をラミ不一トシ、急冷
して得た被覆金属素材を用いて以下の成形条件にて絞シ
しどき加工を行い絞りしどき罐を得た。該絞９しどき罐
を下記の条件にて保存試験全行った結果、良好であった
。Example 1 Mild steel plate (thickness: Q, 126m++h temper: T-
1) A plated metal material with nickel plating of 59/m2 on both sides of steel (Near Aluminum Killed) and chromate treatment on one side (film-coated side), heated at ft310℃1, and polyethylene terephthalate resin applied to the heated metal material. (Molecular weight: 25,000) A film made of gold (
A coated metal material obtained by laminating and quenching a sheet (thickness: 61 μm, degree of orientation: 0%) was subjected to drawing-sealing processing under the following forming conditions to obtain a drawn-sealed can. The 9-squeezed can was subjected to all storage tests under the following conditions, and the results were good.

く成形条件〉 （１）延伸温度（成形直前の樹脂温度）：６５℃（２）
ブランク径：１３９朋 （６）絞９条件；１８を絞υ比：１．８５．２ｎｄ絞９
比：１．４２ （４）シごきポンチ径：　５２．６５ｍｍ（５１総しご
き率；６５％ 〈保存試験条件〉 絞シしどき罐を脱脂洗浄後１８０℃で５分間乾燥し、フ
ランジ加工後、内容物（スプライト）ヲ罐高の９割の高
ざまで充填し、エポキシフェノール系塗料を乾燥厚みで
１０μｍ塗装したアルミ蓋を巻締め、蓋面を下にして６
７℃の雰囲気中に６力月放置する。Molding conditions> (1) Stretching temperature (resin temperature immediately before molding): 65°C (2)
Blank diameter: 139 mm (6) aperture 9 conditions; 18 aperture ratio: 1.85.2nd aperture 9
Ratio: 1.42 (4) Ironing punch diameter: 52.65 mm (51 total ironing rate; 65% <Storage test conditions> After degreasing and cleaning the wringer punching can, dry it at 180°C for 5 minutes, and after flange processing. Fill the contents (sprite) to 90% of the height of the can, wrap the aluminum lid coated with epoxy phenol paint to a dry thickness of 10 μm, and place it with the lid side down.
Leave it in an atmosphere at 7°C for 6 months.

実施例２゜ 軟鋼板の板厚が０−２５ｉ１ｎで被り素材の厚みが６２
μ常である他は実施例１と同様にして得た被０金属素材
を用いて以下の成形条件にて絞シしごき加工を行い絞シ
しどき罐を得た。この絞シしどき罐を実施例１と同様に
して保存試験を行った。Example 2゜The thickness of the mild steel plate is 0-25i1n and the thickness of the covering material is 62mm.
Using the same method as in Example 1 except that μ was normal, drawing and ironing was performed under the following forming conditions to obtain a drawn and ironed can. A storage test was conducted on this squeezed can in the same manner as in Example 1.

その結果は表−１に示す通シであり、良好であった。The results were as shown in Table 1 and were good.

く成形条件〉 （１）延伸温度（成形直前の樹脂温度）：６５℃（２１
ブランク径：１０５ｍ （６）絞９条件：　１ｓｔ絞り比：　１．４０．２１ｙ
ｉ絞９比：１．４２ （４）シごきポンチ径；５２．６５龍 （５）総しごき率；６８％ 実施例６、 軟鋼板の板厚が０−４０ｍｍで仮値素材の厚みが１００
μｍである他は実施例１と同様にして得た被０金属素材
を用いて以下の成形条件にて絞シしどき加工を行い絞シ
しどき罐を得た。この絞シしどき端金実施例１と同様に
して保存試験を行った。Molding conditions> (1) Stretching temperature (resin temperature immediately before molding): 65°C (21
Blank diameter: 105m (6) Aperture 9 conditions: 1st aperture ratio: 1.40.21y
i Drawing 9 ratio: 1.42 (4) Ironing punch diameter: 52.65 (5) Total ironing rate: 68% Example 6, The thickness of the mild steel plate is 0-40 mm, and the tentative thickness of the material is 100
Using a metal material to be obtained in the same manner as in Example 1 except that the diameter was .mu.m, drawing and stamping was performed under the following forming conditions to obtain a drawn and stamped can. A storage test was carried out in the same manner as in Example 1 of this drawn end metal.

その結果は表−１に示す通りであり、良好であった。The results are shown in Table 1 and were good.

〈成形条件〉 （１）延伸温度（成形直前の樹脂温度ン；６５℃（２１
ブランク径；８９期 （６）　絞９条件；１８を絞９比：１．６９（４）シご
きポンチ径；　５２．６５順（５）総しごき率；８０％ 実施例４ 被覆素材が実施例１と同じポリエチレンテレフタレート
樹脂を用いて、製膜化し、さらに９０℃の温度で同時二
軸延伸されたフィルム（厚み：６１μｍ、配向度：１６
％）である他は実施例１と同様の被覆金属素材及び成形
条件にて絞りしごき惚全得た。この絞りしごき端金実施
例１と同様にして保存試験を行った。その結果は表−１
に示す通シであり、良好であった。<Molding conditions> (1) Stretching temperature (resin temperature just before molding; 65℃ (21℃)
Blank diameter: 89 period (6) Drawing 9 conditions: Drawing 18 9 ratio: 1.69 (4) Ironing punch diameter; 52.65 order (5) Total ironing rate: 80% Example 4 Covered material was carried out A film was formed using the same polyethylene terephthalate resin as in Example 1, and then simultaneously biaxially stretched at a temperature of 90°C (thickness: 61 μm, degree of orientation: 16
%), except that the coated metal material and molding conditions were the same as in Example 1. A storage test was conducted in the same manner as in Example 1 of this drawn and ironed scrap metal. The results are in Table-1
The results were good, as shown in the figure.

く成形条件〉 （１）延伸温度（成形直前の樹脂ｆｆ、度）；６５℃（
２）　ブランク径；１６９鮨 （６）絞シ条件：１８を絞り比；　１．８５．２ｎｄ絞
り比：１．４２ （４）シごきポンチ径；　５２．６５ｍｍ（５）総しご
き率：６５％ 実施例５゜ 軟鋼板の板厚が０．２５ｍｍで被Ｕ素材の厚みが６２μ
ｍである他は実施例４と同様にして得た被覆金属素材を
用いて以下の成形条件にて絞ｐしどき加工を行い絞りし
どき罐を得た。この絞りしごき端金英施例１と同様にし
て保存試験全行った。Molding conditions> (1) Stretching temperature (resin ff just before molding, degrees); 65°C (
2) Blank diameter: 169 sushi (6) Squeezing conditions: 18 Squeezing ratio: 1.85.2nd squeezing ratio: 1.42 (4) Shigo punch diameter: 52.65 mm (5) Total ironing rate: 65 % Example 5゜The thickness of the mild steel plate is 0.25mm, and the thickness of the U material is 62μ.
Using a coated metal material obtained in the same manner as in Example 4, except that m was used, the drawing process was carried out under the following forming conditions to obtain a drawn can. All storage tests were carried out in the same manner as in Example 1 with this drawn and ironed end metal.

その結果は表−１に示す通りであシ、良好であった。The results were as shown in Table 1 and were good.

〈成形条件〉 （１１延伸温度（成形直前の樹脂温度）：６５℃（２）
　ブランク径；１０５闘 （６）絞り条件；１Ｓｔ絞り比：１．４０．２ｎｄｆ９
ｆ）比：１．４２ （４）シごきポンチ径；　５２．６５龍（５）　総しご
き率；６８％ 実施例６゜ 軟鋼板の板厚が０−４０ｍｍで被覆素材の厚みが１００
μｍである他は実施例４と同様にして得た被０金属素材
金用いて以下の成形条件にて絞りしごき加工全行い絞シ
しどき罐を得た。この絞りしごき罐を実施例１と同様に
して保存試験を行った。<Molding conditions> (11 Stretching temperature (resin temperature immediately before molding): 65°C (2)
Blank diameter: 105 (6) Aperture conditions: 1St Aperture ratio: 1.40.2ndf9
f) Ratio: 1.42 (4) Ironing punch diameter: 52.65 dragon (5) Total ironing rate: 68% Example 6゜The thickness of the mild steel plate is 0-40 mm and the thickness of the covering material is 100 mm.
Using the zero metal material gold obtained in the same manner as in Example 4, except that the diameter was .mu.m, all the drawing and ironing processes were performed under the following forming conditions to obtain a drawn and ironed can. A storage test was conducted on this squeezed and ironed can in the same manner as in Example 1.

その結果は表−１に示す通りであり、良好であった。The results are shown in Table 1 and were good.

〈成形条件ン （１）延伸温度（成形直前の樹脂己度）；６５℃（２）
ブランク径；８９ｍｍ （６）絞り条件；１ｓｔ絞シ比：１．６９（４）シごき
ポンチ径：　５２．６５ｍｍ（５）総しごき率；８０Ｘ 比較例１゜ 軟鋼板の板厚が０．１０ｍｍで被４夏素材の厚みが２５
μｍである他は実施例１と同様にして得た被覆金属素材
を用いて以下の成形条件にて絞りしごき加工を行い絞り
しどき罐を得た。この絞りしどき端金実施例１と同様に
して保存試験を行った。<Molding conditions (1) Stretching temperature (resin temperature immediately before molding): 65°C (2)
Blank diameter: 89 mm (6) Drawing conditions: 1st drawing ratio: 1.69 (4) Ironing punch diameter: 52.65 mm (5) Total ironing rate: 80X Comparative example 1° Mild steel plate thickness is 0. The thickness of the 4 summer material is 25 mm at 10 mm.
Using a coated metal material obtained in the same manner as in Example 1 except that the thickness was .mu.m, drawing and ironing was performed under the following forming conditions to obtain a drawn and ironed can. A storage test was conducted in the same manner as in Example 1 of this drawn end metal.

その結果は衣−１に示す通りであり、容器として不適で
あった。The results were as shown in Cloth-1, and it was unsuitable as a container.

く成形条件ン （１１延伸温度（成形直前の樹脂温度）；６５℃（２）
ブランク径；１５２龍 （６）絞シ争件：１ｓｔ絞り比：　２．０２．２ｎｄ絞
り比：１．４２ （４）シごきポンチ径；　５２．６５ｍｍ（５）総しご
き率；２０％ 比較例２゜ 軟鋼板の板厚が０．１１５＋＋＋ｍで被覆素材の厚みが
２８μ常である他は実施例１と同様にして得た被覆金属
素材を用いて以下の成形条件にて絞りしごき加工を行い
絞シしどき熾を得た。この絞υしどき罐を実施例１と同
様にして保存試験を行った。Molding conditions (11 Stretching temperature (resin temperature immediately before molding); 65°C (2)
Blank diameter: 152 dragon (6) Drawing issue: 1st drawing ratio: 2.02.2nd drawing ratio: 1.42 (4) Ironing punch diameter: 52.65 mm (5) Total ironing rate: 20% Comparison Example 2゜A coated metal material obtained in the same manner as in Example 1, except that the thickness of the mild steel plate was 0.115+++m and the thickness of the coated material was 28μ, was drawn and ironed under the following forming conditions. I got strangled. A storage test was conducted on this squeezed can in the same manner as in Example 1.

その結果は表−１に示す通りであり、容器として不適で
あった。The results are shown in Table 1, and the container was unsuitable.

く成形条件〉 （１）延伸温度（成形直前の樹脂温度ン；６５℃（２）
　ブランク径：１４３ｍｍ （６１絞り条件；１ｓｔ絞り比：１．９０．２ｎｄ絞り
比：１．４２ （４）シごきポンチ径；５２．６５龍 （５）総しごき率；６０％ 比較例６゜ 軟鋼板の板厚が０．６６闘で被覆素材の厚みが１７０μ
ｍである他は実施例１と同様にして得た被覆金属素材を
用いて以下の成形条件にて絞ジしどき加工全行い絞りし
どき罐を得た。この絞ジしどき罐を実施例１と同様にし
て保存試験を行った。Molding conditions> (1) Stretching temperature (resin temperature immediately before molding: 65°C (2)
Blank diameter: 143mm (61 drawing conditions; 1st drawing ratio: 1.90.2nd drawing ratio: 1.42 (4) Ironing punch diameter: 52.65 (5) Total ironing rate: 60% Comparative example 6° The thickness of the mild steel plate is 0.66mm and the thickness of the coating material is 170μ.
Using a coated metal material obtained in the same manner as in Example 1, except that the number of samples was 1.m, all drawing processing was carried out under the following forming conditions to obtain a drawn and sealed can. A storage test was conducted on this squeezed can in the same manner as in Example 1.

その結果は表−１に示す通りであゃ、容器として不適で
あった。As shown in Table 1, the results were unsuitable for use as a container.

く成形条件〉 （１）　延伸温度（成形条件の樹脂温度）；６５℃（２
）ブランク径；７７％ｍ （６）絞９条件：１ｓｔ絞り比：１．４６（４）シごき
ポンチ径；　５２−６５ｍｍ（５）総しごき率；８８％ 比較例４゜ 軟皓板の板厚が０．１０１ｍで被覆素材の厚みが２５μ
ｍである他は実施例４と同様にして得た被覆金属素材を
用いて以下の成形条件にて絞りしどき加工を行い絞りし
ごきｆｆｆｌを得た。この絞りしごき罐を実施例１と同
様にして保存試験を行った。Molding conditions> (1) Stretching temperature (resin temperature of molding conditions): 65°C (2
) Blank diameter; 77% m (6) Drawing 9 conditions: 1st drawing ratio: 1.46 (4) Ironing punch diameter; 52-65 mm (5) Total ironing rate: 88% Comparative example 4° of soft abrasive board The plate thickness is 0.101m and the thickness of the covering material is 25μ.
Using a coated metal material obtained in the same manner as in Example 4, except for m, drawing and ironing was performed under the following forming conditions to obtain drawing and ironing fffl. A storage test was conducted on this squeezed and ironed can in the same manner as in Example 1.

その結果は表−１に示す通シであり、容器として不適で
あった。The results were as shown in Table 1, and the container was unsuitable.

く成形条件〉 （１）延伸温度（成形直前の樹脂温度）；６５℃（２）
ブランク径；１５２闘 （３）　絞！１％件：１８を絞シ比：２．０２．２ｎｄ
絞り比：１．４２ （４）シごきポンチ径：５２．６５ｍｍ（５）総しごき
率：２０％ 比較例５゜ 軟鋼板の板厚が０．５０朋で被覆素材の厚みが１２５μ
ｍである他は実施例４と同様にして得た被接金属素材を
用いて以下の成形条件にて絞りしごき加工を行い絞りし
どき罐を得た。この絞りしごき端金実施例１と同様にし
て保存試験全行った。Molding conditions> (1) Stretching temperature (resin temperature immediately before molding): 65°C (2)
Blank diameter: 152 fights (3) Squeezing! 1% cases: 18 ratio: 2.02.2nd
Drawing ratio: 1.42 (4) Ironing punch diameter: 52.65 mm (5) Total ironing rate: 20% Comparative example 5 The thickness of the mild steel plate is 0.50 mm and the thickness of the covering material is 125 μ
Using a metal material to be welded obtained in the same manner as in Example 4, except that m was used, drawing and ironing was performed under the following forming conditions to obtain a drawn and ironed can. All the storage tests were carried out in the same manner as in Example 1 of this drawing and ironing scrap metal.

その結果は表−１に示す通りであり、容器として不適で
あった。The results are shown in Table 1, and the container was unsuitable.

〈成形条件ン （１）延伸温度（成形直前の樹脂温度）：６５℃（２）
ブランク径：８６關 （６）絞り条件；１８を絞夛比：１．５８（４）シごき
ポンチ径；　５２．６５ｖｒｍ（５）　総しごき率；８
４％ （注ン １）　試験した絞ジしどき罐は、すべて以下の条件に設
定した。<Molding conditions (1) Stretching temperature (resin temperature immediately before molding): 65°C (2)
Blank diameter: 86 mm (6) Drawing conditions: 18 drawing ratio: 1.58 (4) Ironing punch diameter: 52.65 vrm (5) Total ironing rate: 8
4% (Note 1) All of the tested cans were set under the following conditions.

（１）罐高：１２０間 （２）側壁部の厚み１１００μｍ（被膜の厚みは２０μ
沸） ２　クラック発生はフランジ部の状態を肉眼観桜により
評価した。(1) Can height: 120mm (2) Thickness of side wall 1100μm (film thickness is 20μm)
2.Crack occurrence was evaluated by visual inspection of the condition of the flange.

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

第１図は本発明に用いる被覆金属素材の構成断面図、 第２−Ａ図、第２−８図、第２−Ｃ図及び第２−Ｄ図は
、第１図の被覆金属素材を用いて絞りしごき罐を製造す
る工程を示す断面図である。 引照数字はそれぞれ、１は被覆金属素材、２は金属素材
、６は樹脂層、４は密着下地層、５は絞りダイス、６は
絞りポンチ、７はカップ状成形物、８は再収シダイス、
９は再収９ポンチ、１０はカップ状成形物、１１はしご
きポンチに　１２はしごきダイス、１６はカップ状成形
物の側壁部を示す。 第２−Ａ図 第２−８図 ＼ ２ １３Fig. 1 is a cross-sectional view of the structure of the coated metal material used in the present invention, and Figs. It is a sectional view showing a process of manufacturing a drawn and ironed can. The reference numbers are: 1 is the coated metal material, 2 is the metal material, 6 is the resin layer, 4 is the adhesion base layer, 5 is the drawing die, 6 is the drawing punch, 7 is the cup-shaped molded product, 8 is the re-collection die,
Reference numeral 9 indicates a recovered punch, 10 indicates a cup-shaped molded product, 11 indicates a barring punch, 12 indicates a barring die, and 16 indicates a side wall portion of the cup-shaped molded product. Figure 2-A Figure 2-8\ 2 13

Claims (1)

【特許請求の範囲】 （１）樹脂被覆金属素材の絞シしどき加工によ多形成さ
れた絞シしどき鉋であって、この罐は金属素材の少なく
とも鑵内面となる側に密着下地層全弁して密着されたエ
チレンテレフタレート単位を主体とする熱可塑性ポリエ
ステルの被膜を有し、罐の側壁部において、金属素材は
下記式 ｔｏは罐底部被稙金成材の厚み、１．は側壁部被緯金属
素材の厚み全夫々示す、 で定義される総しごき率（Ｒ）が６０乃至８５％となる
ように薄肉化きれていると共に、側壁部のポリエステル
被膜は下記式 式中、Ｈは該被膜ｋＸ線回折に付したときの罐円周方向
及びポリエステル被膜表面に平行にＸ線を照射して得ら
れる結晶面 （１００）干渉の頂上回折強度曲線からめた半価中を表
わす、 で定義される配向度＜ｆＣ）が２５〜９０％となるよう
に分子配向されていることを特徴とする耐腐食性に優れ
た絞シしどき働。[Scope of Claims] (1) A crimping plane formed by a drawing process of a resin-coated metal material, wherein the can has a base layer that adheres to at least the inner surface of the metal material. It has a thermoplastic polyester coating mainly composed of ethylene terephthalate units that is tightly adhered to the entire can, and the metal material on the side wall of the can is expressed by the following formula: 1. represents the total thickness of the side wall covered metal material, and the thickness has been reduced so that the total ironing rate (R) defined by is 60 to 85%, and the polyester coating on the side wall is as follows: H represents the half value calculated from the peak diffraction intensity curve of crystal plane (100) interference obtained by irradiating X-rays in the can circumferential direction and parallel to the polyester coating surface when the coating is subjected to kX-ray diffraction, A choker with excellent corrosion resistance, characterized in that the molecules are oriented so that the degree of orientation defined by <fC) is 25 to 90%.