JPS6359865B2 - - Google Patents
Info
- Publication number
- JPS6359865B2 JPS6359865B2 JP55100329A JP10032980A JPS6359865B2 JP S6359865 B2 JPS6359865 B2 JP S6359865B2 JP 55100329 A JP55100329 A JP 55100329A JP 10032980 A JP10032980 A JP 10032980A JP S6359865 B2 JPS6359865 B2 JP S6359865B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- cylindrical body
- tube container
- extruded tube
- layer
- 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.)
- Expired
Links
- 239000010410 layer Substances 0.000 claims description 45
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 229920005989 resin Polymers 0.000 claims description 20
- 239000011347 resin Substances 0.000 claims description 20
- 230000004888 barrier function Effects 0.000 claims description 16
- 229920005672 polyolefin resin Polymers 0.000 claims description 12
- 229920005992 thermoplastic resin Polymers 0.000 claims description 10
- 239000011247 coating layer Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000012790 adhesive layer Substances 0.000 claims description 5
- 239000004840 adhesive resin Substances 0.000 claims description 4
- 229920006223 adhesive resin Polymers 0.000 claims description 4
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 239000000088 plastic resin Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 6
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- 229920006122 polyamide resin Polymers 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 241000973497 Siphonognathus argyrophanes Species 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 229920006225 ethylene-methyl acrylate Polymers 0.000 description 2
- 239000005043 ethylene-methyl acrylate Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- UPZFLZYXYGBAPL-UHFFFAOYSA-N 2-ethyl-2-methyl-1,3-dioxolane Chemical compound CCC1(C)OCCO1 UPZFLZYXYGBAPL-UHFFFAOYSA-N 0.000 description 1
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical group 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 229920006163 vinyl copolymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Tubes (AREA)
Description
本発明は内容物保護性能が高く、かつ美麗に印
刷可能な金属層を有する押出チユーブ容器および
その製造方法に関するものである。
一般に、合成樹脂のみによつて形成された押出
チユーブ容器は柔らかで、美しい表面性を持つて
いるが、その反面、金属製押出チユーブ容器に比
べガス遮断性が著しく低い問題がある。そこで金
属層を容器の壁に入れるには合成樹脂と金属とが
成形条件が異なるため、一般的には、３〜100μ
に調製した金属層を予め作成し、この金属層を含
む合成樹脂製の積層シートを作成して、この積層
シートを所望の径の円筒状に丸め、その両端部の
重ね合せ部をシールすることによつて筒状体と
し、この筒状体を胴部としてその一端に口部を形
成し押出チユーブ容器を製造してきた。しかしな
がら、この金属層を含む押出チユーブ容器は耐圧
強度が一般に低く、シールした重ね合せ部が破損
しやすいので内容物を充填した場合、破損して内
容物が漏れるという問題があつた。又胴部の重ね
合せ部において表面に段差が生まれ、この段差を
なくすようにシール時に過大な圧力を加えると金
属層にクラツクが入るなどの問題があつた。さら
にこの重ね合せ部の段差が大きいので、印刷や箔
押し等の二次加工において、絵柄、文字等に重ね
合せ部がかかると絵柄、文字等に切れ目が発生す
るなどの問題があつて、高級感に欠けるという問
題があつた。
又、胴部を形成する場合に積層シートの最外層
と最内層を融着する方法と最内層同志を融着し、
この融着した部分の最外層と隣接する最外層をさ
らに融着する方法があるが、後者は著しく重ね合
せ部が肉厚になり、かつ円筒形となすべき所がか
なり歪になつて、ストレスが発生しやすいなどの
問題点があり、前者のシール方法においては、積
層シートの最外層と最内層の樹脂が融着しやすい
という必要性と共に端面が内容物に接触して、金
属層が腐蝕するなどという問題が発生し、その対
策として、金属層の内側端面を樹脂で覆うような
成形が考えられているが、内容物保護という面で
は充分なものではない。
本発明は上記点に鑑み、欠点を解消した押出チ
ユーブ容器およびその製造方法を提供するもので
あつて、接着樹脂層／金属層／接着樹脂層からな
る積層シートを丸め合せ、その端部を重ね合せて
融着して筒状体とし、その筒状体の内側にはシー
ル可能な熱可塑性樹脂層を形成し、他方筒状体の
外側には二層からなる被覆層を形成した胴部を有
する事を特徴とする押出チユーブ容器である。以
下図面を用いて説明すると、第１図に示すような
押出チユーブ容器Ａであつて、一般には内容物を
充填後ヒートシール等により一端を閉じている胴
部１を有し、この胴部１の他端には口部２が設け
られ、この口部２にはキヤツプ３が螺着されてい
る。また第２図は第１図の押出チユーブ容器Ａの
横断面図の一つの具体例を示したものであつて、
４は金属層５を含む積層シートで丸め、その端部
同志を重ね合せて加熱、加圧等によりシールした
筒状体である。本発明の押出チユーブ容器Ａの胴
部１は、上記筒状体４の内側にはシール可能な熱
可塑性樹脂層６を形成し、他方筒状体４の外側に
は変性ポリオレフイン系樹脂７とバリヤー性樹脂
８からなる被覆層９を形成した胴部１を有するこ
とを特徴とする押出チユーブ容器である。
ここで、筒状体における金属層５としては、伸
展性が高くピンホールが少ない、しかも５〜
100μ好ましくは、７〜40μの厚みのアルミニウム
等の金属箔を使用する。次にこの金属層５の両面
に積層する接着層１０としては、ポリ酢酸ビニル
樹脂などの接着剤、あるいはエチレン−メチルア
クリレート（EMA）、エチレン−アクリル酸共重
合体樹脂（EAA）等の不飽和カルボン酸又はそ
の誘導体で変性したポリオレフイン樹脂を使用す
ることが好ましい。
又筒状体５の内側に形成するシール可能な熱可
塑性樹脂６としては、ポリエチレン等のオレフイ
ン樹脂、ポリアミド系樹脂およびアイオノマー、
エチレン−酢酸ビニル共重合体、エチレン−酢酸
ビニル共重合体ケン化物等の変性ポリオレフイン
樹脂などで、内容物充填後、底部を熱シールする
事ができて、且つ口部樹脂と融着できる事の可能
な熱可塑性樹脂を使用するものである。又筒状体
４の外側に変性ポリオレフイン系樹脂７として
は、メルトインデツクス（以下MIという）が2.5
以下、好ましくは2.0〜0.3のポリオレフイン系樹
脂を使用する。すなわちMIが2.5以上では粘度が
低すぎて、前記の如く被覆を均一に行なえないと
共に、ストレスクラツクが発生しやすいという問
題がある。
又、バリヤ性樹脂８としては、６ナイロン、66
−ナイロン等のポリアミド系樹脂やエチレン酢酸
ビニル共重合体ケン化物などがあり、表面を平滑
にかつ剛性を出す為には、相対粘度（ηrel）が３
〜６の範囲のものが好ましい。すなわち、相対粘
度が３以下では表面にスジが発生しやすく、又６
以上では均一に薄く成形するには難しくサメ状の
表面となりやすい。
次に本発明の押出チユーブ容器の胴部の製造方
法を第４図を用いて説明すると、まず金属層の両
側に接着樹脂層がコートされた積層シート１１を
筒状に丸めて、その端部同志を重ね合せ、その重
合部をシール機１２によつて加熱加圧して筒状体
４′とし、次いでシール可能な熱可塑性樹脂用の
押出ヘツド１３より該樹脂のパリソン１４を押出
し、このパリソンにて該筒状体の内側を被覆し、
冷却ガイド１５に接触させて冷却する。次に、変
性ポリオレフイン樹脂用の押出機１６とガスバリ
ヤ性樹脂用の押出機１７の２台の押出機と、ダイ
内で２種２層にする積層用押出ヘツド１８を用い
て積層したパリソン１９を共押出して、この積層
パリソン１９で該筒状体４′の外側を被覆し、冷
却ガイド２０に接触させ冷却する。以上のように
して本発明の押出チユーブ容器の胴部用筒状体を
製造し、この筒状物を所望の長さで切断し胴部と
し、この胴部を従来周知の口部成形用金型に挿入
して、口部成形用樹脂を射出し、口部成形と同時
に、胴部と口部とを融着して押出チユーブ容器の
製造を完了する。
次に本発明の実施例を示す。
実施例
Ｔダイ型ラミネート機にて、エチレン−アクリ
ル酸共重合体（EAA）／アルミ箔／エチレン−
アクリル酸共重合体（EAA）の構成である積層
シートを作成後、このシートを出来上りのチユー
ブ容器の胴部の円周より重ね合せ分広い巾でスリ
ツトし、このスリツトしたシートを丸め合せて重
合部をシールして筒状体とし、まず第１層すなわ
ち最内層となるシール可能な熱可塑性樹脂とし
て、密度0.920、MI＝0.4の低密度ポリエチレン
（LDPE）樹脂を押出ヘツドから押出して該筒状
体の内側を被覆後冷却し、次に第５層〜第６層す
なわち被覆層となる密度0.920、MI＝0.4の変性ポ
リエチレン樹脂とηrel＝4.5の６−ナイロン樹脂
をダイ内で接着して積層押出ヘツドから共押出し
ながら該筒状体の外側を被覆して後、冷却し、所
望の長さに切断してチユーブ容器の胴部を作成
し、この胴部をチユーブ口部形成金型に挿入し
て、密度0.910、MI＝2.0のLDPEを射出して、口
部形成と同時に胴部と口部を融着して下記表１に
示すような構成の胴部を有する押出チユーブ容器
を得た。
The present invention relates to an extruded tube container that has a metal layer that has high content protection performance and can be printed beautifully, and a method for manufacturing the same. In general, extruded tube containers made only of synthetic resin have a soft and beautiful surface, but on the other hand, they have a problem of significantly lower gas barrier properties than metal extruded tube containers. Therefore, in order to insert a metal layer into the wall of the container, the molding conditions for synthetic resin and metal are different, so generally the thickness is 3 to 100 μm.
Preparing a metal layer prepared in advance, creating a laminated sheet made of synthetic resin containing this metal layer, rolling this laminated sheet into a cylindrical shape with a desired diameter, and sealing the overlapped portions at both ends. An extruded tube container has been manufactured by forming a cylindrical body by using the cylindrical body and forming a mouth at one end of the cylindrical body. However, extruded tube containers containing this metal layer generally have low pressure resistance, and the sealed overlapped portions are easily damaged, so when filled with contents, there was a problem that the containers would break and the contents would leak. In addition, there is a problem in that a level difference is created on the surface at the overlapped portion of the body, and if excessive pressure is applied during sealing to eliminate this level difference, cracks may occur in the metal layer. Furthermore, because the level difference in this overlapping part is large, there are problems such as cuts in the design, letters, etc. when the overlapping part covers the pattern, letters, etc. during secondary processing such as printing and foil stamping, which creates a sense of luxury. There was a problem that there was a lack of In addition, when forming the trunk, there is a method of fusing the outermost layer and the innermost layer of the laminated sheet, and a method of fusing the innermost layers together,
There is a method of further welding the outermost layer of this fused part and the adjacent outermost layer, but in the latter case, the overlapping part becomes extremely thick, and the part that should be cylindrical becomes considerably distorted, causing stress. In the former sealing method, the outermost layer and innermost layer of the laminated sheet resin need to be easily fused together, and the end surface may come into contact with the contents, causing corrosion of the metal layer. As a countermeasure to this problem, molding in which the inner end surface of the metal layer is covered with resin has been considered, but this is not sufficient in terms of protecting the contents. In view of the above points, the present invention provides an extruded tube container that eliminates the drawbacks and a method for manufacturing the same, in which a laminated sheet consisting of an adhesive resin layer/metal layer/adhesive resin layer is rolled up, and the ends are overlapped. They are fused together to form a cylindrical body, and a sealable thermoplastic resin layer is formed on the inside of the cylindrical body, and a body part is formed with a two-layer coating layer on the outside of the cylindrical body. This is an extruded tube container characterized by having the following features. The following explanation will be given with reference to the drawings. It is an extruded tube container A as shown in FIG. A mouth portion 2 is provided at the other end, and a cap 3 is screwed onto this mouth portion 2. FIG. 2 shows a specific example of a cross-sectional view of the extruded tube container A shown in FIG.
Reference numeral 4 denotes a cylindrical body formed by rolling a laminated sheet containing a metal layer 5, overlapping the ends thereof, and sealing them by heating, pressurizing, or the like. The body 1 of the extruded tube container A of the present invention has a sealable thermoplastic resin layer 6 formed on the inside of the cylindrical body 4, and a modified polyolefin resin 7 and a barrier layer on the outside of the cylindrical body 4. This is an extruded tube container characterized by having a body portion 1 on which a coating layer 9 made of a synthetic resin 8 is formed. Here, the metal layer 5 in the cylindrical body has high extensibility and few pinholes, and is
A metal foil such as aluminum having a thickness of 100μ, preferably 7 to 40μ, is used. Next, the adhesive layer 10 to be laminated on both sides of the metal layer 5 is an adhesive such as polyvinyl acetate resin, or an unsaturated adhesive such as ethylene-methyl acrylate (EMA) or ethylene-acrylic acid copolymer resin (EAA). Preferably, polyolefin resins modified with carboxylic acids or derivatives thereof are used. The sealable thermoplastic resin 6 formed inside the cylindrical body 5 may include olefin resins such as polyethylene, polyamide resins, ionomers,
Made of modified polyolefin resin such as ethylene-vinyl acetate copolymer or saponified ethylene-vinyl acetate copolymer, the bottom can be heat-sealed after filling, and it can be fused to the mouth resin. It uses possible thermoplastic resins. The modified polyolefin resin 7 on the outside of the cylindrical body 4 has a melt index (hereinafter referred to as MI) of 2.5.
Hereinafter, preferably 2.0 to 0.3 polyolefin resin is used. That is, if the MI is 2.5 or more, the viscosity is too low, and there is a problem that it is not possible to coat uniformly as described above, and stress cracks are likely to occur. In addition, as the barrier resin 8, nylon 6, 66
-There are polyamide resins such as nylon and saponified ethylene vinyl acetate copolymers, and in order to make the surface smooth and rigid, the relative viscosity (ηrel) must be 3.
-6 is preferable. That is, if the relative viscosity is 3 or less, streaks are likely to occur on the surface, and if the relative viscosity is 3 or less, streaks are likely to occur on the surface;
Above this, it is difficult to form the film uniformly and thinly, and the surface tends to become shark-like. Next, the method for manufacturing the body of the extruded tube container of the present invention will be explained using FIG. They are overlapped and the overlapping part is heated and pressurized by a sealing machine 12 to form a cylindrical body 4', and then a parison 14 of the resin is extruded from an extrusion head 13 for sealable thermoplastic resin, and this parison is to coat the inside of the cylindrical body,
It is cooled by contacting the cooling guide 15. Next, a parison 19 is laminated using two extruders, an extruder 16 for modified polyolefin resin and an extruder 17 for gas barrier resin, and an extrusion head 18 for laminating two types and two layers in a die. After coextrusion, the outer surface of the cylindrical body 4' is covered with this laminated parison 19, and the cylindrical body 4' is brought into contact with a cooling guide 20 to be cooled. The cylindrical body for the body of the extruded tube container of the present invention is manufactured as described above, and this cylindrical body is cut to a desired length to form a body. It is inserted into a mold, resin for mouth molding is injected, and at the same time as the mouth is molded, the body and mouth are fused to complete the manufacture of the extruded tube container. Next, examples of the present invention will be shown. Example Using a T-die type laminating machine, ethylene-acrylic acid copolymer (EAA)/aluminum foil/ethylene-
After creating a laminated sheet made of acrylic acid copolymer (EAA), this sheet is slit to a width wider than the circumference of the body of the finished tube container, and the slit sheets are rolled up and polymerized. First, as the first layer, that is, the innermost layer, a sealable thermoplastic resin, low density polyethylene (LDPE) resin with a density of 0.920 and MI = 0.4 is extruded from an extrusion head to form the cylindrical body. After coating the inside of the body, it is cooled, and then the modified polyethylene resin with a density of 0.920 and MI = 0.4 and the 6-nylon resin with ηrel = 4.5, which will become the 5th and 6th layers, that is, the coating layer, are bonded in a die and laminated. After coating the outside of the cylindrical body while coextruding from the extrusion head, it is cooled and cut to a desired length to create the body of the tube container, and this body is inserted into the tube mouth forming mold. Then, LDPE with a density of 0.910 and MI=2.0 was injected, and at the same time as the mouth was formed, the body and the mouth were fused to obtain an extruded tube container having a body configured as shown in Table 1 below. .
【表】 次に比較例を示す。 比較例【table】 Next, a comparative example will be shown. Comparative example
【表】
上表２の第１〜５層の構成の積層シートをＴダ
イ型のラミネート機にて作成後、容器胴体部の円
周より重ね合せ分広い巾でスリツトし、このシー
トを丸めて筒状にし、その端部同志を重ね合せて
シールして胴部を作成した。この胴部を前記実施
例と同様にチユーブ口部形成金型に挿入して密度
0.910、MI＝2.0の低密度ポリエチレンを射出し
て、口部形成と同時に胴部と口部を融着して胴部
に重合部を有する押出チユーブ容器を得た。
上記（実施例）と（比較例）の押出チユーブ容
器の物性を下表３に示す。[Table] After creating a laminated sheet with the structure of the first to fifth layers in Table 2 above using a T-die laminating machine, slit it to a width wider than the circumference of the container body by the amount of overlap, and roll this sheet. It was made into a cylinder, and the ends were overlapped and sealed to create a body. This body is inserted into the tube mouth forming mold in the same manner as in the previous example, and the density is
0.910, MI=2.0 was injected, and at the same time as the mouth was formed, the body and the mouth were fused to obtain an extruded tube container having a polymerized portion in the body. The physical properties of the extruded tube containers of the above (Example) and (Comparative Example) are shown in Table 3 below.
【表】
本発明は以上の如くの構成であつて、表面に被
覆層が形成されているので、平滑で継目のない押
出チユーブ容器であつて、重合部が露出していな
いので印刷、箔押し等の二次加工が支障なく美麗
に行う事によつて付加価置を向上させ、又最外層
として極性基を持つポリアミド系やエチレン−酢
酸ビニル共重合体ケン化物等のガスバリヤ性樹脂
を使用しているので、インキとの接着が強く、剥
れることがないと共に傷つきにくく、汚れにくい
ということから、従来のものに比べてドライオフ
セツト印刷を施した後でもオーバーコートニスを
設けることがないので二次加工が簡単で、しかも
工程が少なくなりロスが少なくなる。また、本発
明の製造方法として、金属層を含む積層シートを
筒状体とし、２台の押出機とダイ内で２種２層に
する積層用ヘツドを用いて積層したパリソンを押
出して、そのパリソンで筒状体を被覆する事によ
つて成形可能とし、層間の接着力の高い胴部を提
供するものである。次に筒状体の金属層として薄
い箔を用いた場合、ピンホールが発生し、バリヤ
性が完全でない事が多いが、本発明の押出チユー
ブ容器の胴部は、ポリアミド系樹脂あるいはエチ
レン−酢酸ビニル共重合体ケン化物等の極性機を
持つ樹脂が、ガスバリヤ性や油脂、有機溶剤のバ
リヤ性を持ち、又その内側の変性ポリオレフイン
樹脂は水に対するバリヤ性を持つので、これら二
層の被覆層の存在によつてバリヤ性がさらに良好
となる。さらに金属層を押出チユーブ容器のよう
な可撓性を必要とする容器に用いると、クラツク
が生じることが多いが、本発明の押出チユーブ容
器においては、被覆層によつて耐圧力等の物性が
向上するので、折れ曲りにくくなるので、クラツ
クも生じにくくなる。
ここで、該筒状体の内側の接着層として不飽和
カルボン酸又はその誘導体で変性させたポリオレ
フイン系樹脂を使用して、最内層のシール可能な
熱可塑性樹脂と接着層とを一つの層で兼ねて、シ
ール可能な熱可塑性樹脂を省略しても良い。
さらに、本発明の押出チユーブ容器の最外層の
バリヤ性樹脂は熱に対する粘度の変化が大きく、
殊に成形温度近くの粘度の低下が著しいので、バ
リヤ性樹脂単独の押出コートでは均一に被覆する
事ができない。殊にはダイ外ではほとんど被覆す
ることができない場合もあるが、本発明において
はバリヤ性樹脂の内側に変性ポリオレフインより
なる接着樹脂層を設けたことにより、同時押出し
て均一に被覆させるには変性ポリオレフイン樹脂
の溶融粘度が高い必要があり、メルトインデツク
スが2.5以下好ましくは２〜0.3の範囲にあれば、
被覆は均一に行なわれる。ここで、被覆層の一部
又は全部を着色して不透明化する事により、印刷
等の二次加工の効果をより大きくし、円筒体の重
合部を見せることなく高級感を出す事ができ、又
積層シートの厚みが薄肉であれば、重合部の表面
の平滑度が増すので、本発明のチユーブ容器はそ
の点においても高級感がでることはもちろんであ
る。[Table] The present invention has the above-described structure, and since a coating layer is formed on the surface, it is a smooth and seamless extruded tube container, and since the polymerization part is not exposed, printing, foil stamping, etc. The added value is improved by allowing the secondary processing to be performed beautifully without any problems, and by using gas barrier resins such as polyamides with polar groups or saponified ethylene-vinyl acetate copolymers as the outermost layer. Because of its strong adhesion to ink, it does not peel off, is not easily scratched, and is resistant to staining. Compared to conventional methods, it does not require an overcoat varnish even after dry offset printing. Next processing is easy, and there are fewer steps and less loss. In addition, as a manufacturing method of the present invention, a laminated sheet containing a metal layer is made into a cylindrical body, and a laminated parison is extruded using two extruders and a lamination head that creates two types and two layers in a die. By covering the cylindrical body with a parison, it can be molded and provides a body with high interlayer adhesion. Next, when thin foil is used as the metal layer of the cylindrical body, pinholes occur and the barrier properties are often not perfect. However, the body of the extruded tube container of the present invention is made of polyamide resin or ethylene-acetic acid Resins with polar machines such as saponified vinyl copolymers have gas barrier properties, oil and fat, and organic solvent barrier properties, and the modified polyolefin resin inside has barrier properties against water, so these two coating layers The presence of the compound further improves the barrier properties. Furthermore, when a metal layer is used in a container that requires flexibility, such as an extruded tube container, cracks often occur, but in the extruded tube container of the present invention, the coating layer improves physical properties such as pressure resistance. This makes it less likely to bend and cause cracks. Here, a polyolefin resin modified with an unsaturated carboxylic acid or its derivative is used as the adhesive layer inside the cylindrical body, and the sealable thermoplastic resin as the innermost layer and the adhesive layer are combined into one layer. Alternatively, the sealable thermoplastic resin may be omitted. Furthermore, the barrier resin of the outermost layer of the extruded tube container of the present invention has a large change in viscosity with respect to heat;
In particular, since the viscosity decreases significantly near the molding temperature, uniform coating cannot be achieved by extrusion coating using a barrier resin alone. In particular, there are cases where it is almost impossible to coat outside the die, but in the present invention, an adhesive resin layer made of modified polyolefin is provided inside the barrier resin, so that it is difficult to coat the modified polyolefin uniformly by coextrusion. The polyolefin resin must have a high melt viscosity, and if the melt index is 2.5 or less, preferably in the range of 2 to 0.3,
The coating is uniform. By coloring part or all of the coating layer to make it opaque, it is possible to increase the effect of secondary processing such as printing and create a luxurious look without showing the overlapping part of the cylinder. Furthermore, if the thickness of the laminated sheet is thin, the surface smoothness of the polymerized portion will increase, and the tube container of the present invention will of course have a high-class feel in this respect as well.
図面は本発明の一実施例を示すものであつて、
第１図は本発明の押出チユーブ容器の側面図、第
２図は第１図のＰ−P′線を矢示方向へ見た横断
面、第３図は第２図の丸印個所の拡大図であり、
第４図は本発明の押出チユーブ容器の胴部を製造
する工程を示す説明図である。
Ａ……押出チユーブ容器、１……胴部、２……
口部、３……キヤツプ、４……筒状体、５……金
属層、６……シール可能な熱可塑性樹脂層、７…
…変性ポリオレフイン樹脂層、８……バリヤ性樹
脂、９……被覆層、１０，１０′……接着層、１
１……積層シート、１２……シール機、１３……
押出ヘツド、１４……パリソン、１５……冷却ガ
イド、１６……押出機、１７……押出機、１８…
…押出ヘツド、１９……パリソン、２０……冷却
ガイド。
The drawings show one embodiment of the invention,
Fig. 1 is a side view of the extruded tube container of the present invention, Fig. 2 is a cross section taken along line P-P' in Fig. 1 in the direction of the arrow, and Fig. 3 is an enlarged view of the circled portion in Fig. 2. is a diagram,
FIG. 4 is an explanatory view showing the process of manufacturing the body of the extruded tube container of the present invention. A... Extruded tube container, 1... Body, 2...
Mouth part, 3... Cap, 4... Cylindrical body, 5... Metal layer, 6... Sealable thermoplastic resin layer, 7...
...Modified polyolefin resin layer, 8...Barrier resin, 9...Coating layer, 10,10'...Adhesive layer, 1
1... Laminated sheet, 12... Sealing machine, 13...
Extrusion head, 14... Parison, 15... Cooling guide, 16... Extruder, 17... Extruder, 18...
...Extrusion head, 19...Parison, 20...Cooling guide.
Claims (1)
層シートを丸めて筒状体とし、この筒状体の内側
にシール可能な熱可塑性樹脂を設け、外側には変
性ポリオレフイン系樹脂およびガスバリヤ樹脂よ
りなる被覆層が設けられた胴部を有する押出チユ
ーブ容器。 ２ 金属層の両面に接着層がコートされた積層シ
ートを丸めて、その端部を重ね合せてシールして
筒状体とし、この筒状体の内側を押出ヘツドから
押出されたシール可能な熱可塑性樹脂のパリソン
で被覆し、次いでこの筒状体の外側を二台の押出
機を有する押出ヘツドから共押出した変性ポリオ
レフイン樹脂とガスバリヤ樹脂の積層したパリソ
ンで被覆して押出チユーブ容器の胴部を得ること
を特徴とした押出チユーブ容器の製造方法。[Claims] 1. A laminated sheet in which adhesive resin layers are coated on both sides of a metal layer is rolled into a cylindrical body, a sealable thermoplastic resin is provided on the inside of this cylindrical body, and a modified polyolefin is provided on the outside. An extruded tube container having a body provided with a coating layer made of a resin and a gas barrier resin. 2 A laminated sheet coated with an adhesive layer on both sides of the metal layer is rolled up, the ends are overlapped and sealed to form a cylindrical body, and the inside of this cylindrical body is heated with sealable heat extruded from an extrusion head. The body of the extruded tube container is coated with a parison of plastic resin, and then the outside of this cylindrical body is covered with a laminated parison of modified polyolefin resin and gas barrier resin coextruded from an extrusion head having two extruders to form the body of the extruded tube container. A method for manufacturing an extruded tube container characterized by obtaining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10032980A JPS5728741A (en) | 1980-07-21 | 1980-07-21 | Extruding tube vessel and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10032980A JPS5728741A (en) | 1980-07-21 | 1980-07-21 | Extruding tube vessel and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5728741A JPS5728741A (en) | 1982-02-16 |
| JPS6359865B2 true JPS6359865B2 (en) | 1988-11-21 |
Family
ID=14271112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10032980A Granted JPS5728741A (en) | 1980-07-21 | 1980-07-21 | Extruding tube vessel and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5728741A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4879258A (en) * | 1972-01-26 | 1973-10-24 | ||
| JPS5126477A (en) * | 1974-08-29 | 1976-03-04 | Mitsubishi Electric Corp | ZETSUENGEETOGATADENKAIKOKATORANJISUTA |
| JPS5245273A (en) * | 1975-10-08 | 1977-04-09 | Hitachi Ltd | Method for production of semiconductor device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5820347Y2 (en) * | 1977-12-26 | 1983-04-27 | 大和製缶株式会社 | multilayer tube |
-
1980
- 1980-07-21 JP JP10032980A patent/JPS5728741A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4879258A (en) * | 1972-01-26 | 1973-10-24 | ||
| JPS5126477A (en) * | 1974-08-29 | 1976-03-04 | Mitsubishi Electric Corp | ZETSUENGEETOGATADENKAIKOKATORANJISUTA |
| JPS5245273A (en) * | 1975-10-08 | 1977-04-09 | Hitachi Ltd | Method for production of semiconductor device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5728741A (en) | 1982-02-16 |
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