JPH0753429B2 - Manufacturing method of composite container - Google Patents
Manufacturing method of composite containerInfo
- Publication number
- JPH0753429B2 JPH0753429B2 JP25255786A JP25255786A JPH0753429B2 JP H0753429 B2 JPH0753429 B2 JP H0753429B2 JP 25255786 A JP25255786 A JP 25255786A JP 25255786 A JP25255786 A JP 25255786A JP H0753429 B2 JPH0753429 B2 JP H0753429B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- sheet
- multilayer sheet
- plastic
- composite container
- 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 - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
- B29C45/14811—Multilayered articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
- B29C2045/14237—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being deformed or preformed outside the mould or mould cavity
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、共押出層を含むプラスチツク多層シートとそ
のスクラツプを含有する再生層とを合体して複合容器を
製造する方法に関する。Description: FIELD OF THE INVENTION The present invention relates to a method for producing a composite container by combining a plastic multilayer sheet containing a coextrusion layer and a regenerating layer containing the scrap thereof.
（従来の技術） 従来より、ガスバリヤー性に優れたプラスチツク層と熱
シール性、防湿性に優れたプラスチツク層等と積層する
ことにより両者の特性を兼ね備えた複合容器を製造する
方法としては、共押出法により得られるプラスチツク多
層シートあるいは該共押出層にドライラミネート法等に
より他の層を積層してなるプラスチツク多層シートを真
空成形法、圧空成形法等により熱成形する方法、各々の
樹脂を成形型中に射出して容器を形成する共インジエク
シヨン法（例えば特開昭60−34819号公報）等が提案さ
れている。(Prior Art) Conventionally, as a method for producing a composite container having both properties by laminating a plastic layer having an excellent gas barrier property and a plastic layer having an excellent heat-sealing property and moisture-proof property, A method of thermoforming a plastic multi-layer sheet obtained by extrusion or a plastic multi-layer sheet in which other layers are laminated on the co-extruded layer by a dry lamination method or the like by thermoforming by a vacuum forming method, a pressure forming method or the like, and forming each resin. A co-injection method (for example, JP-A-60-34819) in which a container is injected into a mold to form a container has been proposed.
（発明が解決しようとする問題点） しかしなら、前者の共押出層を含むシートを熱成形する
方法においては、シート製造工程あるいは容器を打ち抜
いた後等にスクラツプが生じる問題があり、このスクラ
ツプを含む層をプラスチツク多層シートの共押出層中で
再生利用しようとしても熱履歴を多く受けているスクラ
ツプによる原料粘度変動等の不安定要素により他の樹脂
との共押出が困難となる嫌いがあり、あるいは積層工程
が増加するので再生利用率を大きくできない問題があつ
た。また後者の共インジエクシヨン法ではスクラツプは
少ないものの、多数の層をすべて射出成形で形成するた
め、装置全体が極めて大がかりとなる問題があつた。(Problems to be solved by the invention) However, in the former method of thermoforming a sheet containing a coextrusion layer, there is a problem that a scrap occurs after a sheet manufacturing process or after punching a container. There is a dislike that it becomes difficult to coextrude with other resins due to unstable factors such as fluctuation of raw material viscosity due to scrap that is subject to a lot of thermal history even when trying to recycle the layer containing in the coextruded layer of the plastic multi-layer sheet, Alternatively, there is a problem that the recycling rate cannot be increased because the number of stacking steps increases. Further, the latter co-injection method has a small amount of scrap, but has a problem that the entire apparatus becomes extremely large because many layers are all formed by injection molding.
（問題点を解決するための手段） 本発明は共押出層を含むプラスチツク多層シートの熱成
形と再生層形成工程とを分離して、スクラツプの有利な
利用を実現したものでありその要旨は共押出層を含むプ
ラスチツク多層シートを容器形状に熱成形するととも
に、前記多層シートのスクラツプを含有する再生層を前
記多層シートとは別個に形成して前記熱成形された多層
シートと積層することを特徴とする複合容器の製造方法
である。(Means for Solving the Problems) The present invention realizes an advantageous use of the scrap by separating the thermoforming of the plastic multilayer sheet including the coextrusion layer and the step of forming the regenerated layer. A plastic multilayer sheet including an extruded layer is thermoformed into a container shape, and a recycled layer containing a scrap of the multilayer sheet is formed separately from the multilayer sheet and laminated with the thermoformed multilayer sheet. And a method for manufacturing a composite container.
共押出層を含むプラスチツク多層シートとしては、ポリ
プロピレン、ポリエチレン、ポリ塩化ビニル等のプラス
チツクを溶融し、多層ダイから共押出成形したもの、あ
るいは該共押出層に対してさらに他の層を接着剤を用い
てドライラミネート法により積層したもの等が用いられ
る。The plastic multilayer sheet containing the coextruded layer is obtained by melting a plastic such as polypropylene, polyethylene, or polyvinyl chloride and coextruded from a multi-layer die, or an adhesive layer is added to the coextruded layer. For example, those laminated by a dry laminating method are used.
上記シートを熱成形する工程は、シートを加熱軟化して
圧空成形、真空成形、プレス成形等により容器形状に成
形する工程である。The step of thermoforming the sheet is a step of heating and softening the sheet to form a container shape by pressure forming, vacuum forming, press forming, or the like.
プラスチツク多層シートのスクラツプとは、プラスチツ
クを共押出成形する際の、またはドライラミネートする
際の両側端の不良部（いわゆる耳）、あるいは熱成形し
た時のトリミングロス等である。The scrap of the plastic multi-layer sheet is a defective portion at both ends (so-called ears) when co-extruding the plastic or dry laminating, or trimming loss when thermoforming.
以下添付図面により詳細に説明する。A detailed description will be given below with reference to the accompanying drawings.
第１図は本発明の複合容器の製造方法の１例の流れ図、
第２図は各工程の概略説明図であり、第３図は他の例の
流れ図、第４図はその各工程の概略説明図である。FIG. 1 is a flow chart of an example of a method for manufacturing a composite container of the present invention,
FIG. 2 is a schematic explanatory diagram of each step, FIG. 3 is a flowchart of another example, and FIG. 4 is a schematic explanatory diagram of each step.
第１、２図においては、まず第１段階で共押出法、さら
に必要に応じドライラミネート法等により共押出層を含
むプラスチツク多層シート１を準備する。第２段階で前
記シート１を真空成形、圧空成形等により成形して成形
品２とする。この時成形品２をトリミングして残りのシ
ート１をスクラツプ３としてもよい。さらに第３段階で
は成形品２を射出成形型４にセツトし、射出成形機５に
より成形品２表面に再生層６を形成し複合容器７を得ら
れる。必要に応じ仕上げのトリミングを行なつてもよ
い。In FIGS. 1 and 2, first, in the first step, a plastic multilayer sheet 1 including a coextrusion layer is prepared by a coextrusion method and, if necessary, a dry lamination method or the like. In the second step, the sheet 1 is formed into a molded product 2 by vacuum forming, pressure forming, or the like. At this time, the molded product 2 may be trimmed and the remaining sheet 1 may be used as the scrap 3. Further, in the third stage, the molded product 2 is set in the injection mold 4, and the injection molding machine 5 forms the recycled layer 6 on the surface of the molded product 2 to obtain the composite container 7. Finishing trimming may be performed as necessary.
ここで射出成形機５には、第１〜３段段階で生じたスク
ラツプ３を粉砕、造粒したものを再生原料として供給す
る。もちろん他の原料を加えてもかまわない。成形品２
の内面に再生層を設ければ外観が向上するが、外面に設
ければ射出成形性が良い。もちろんさらに多くの層を共
射出成形により設けてもよい。Here, the crushed and granulated scrap 3 generated in the first to third stages is supplied to the injection molding machine 5 as a recycled raw material. Of course, other ingredients may be added. Molded product 2
The appearance is improved by providing the reproduction layer on the inner surface, but the injection moldability is improved by providing the reproduction layer on the outer surface. Of course, more layers may be provided by co-injection molding.
第３、４図においては、第１段階でスクラツプを含有す
る樹脂を単層で溶融押出して単層の再生シート61を得
る。後工程で生ずるスクラツプ３を回収して使用すれば
良いが、新原料を混入してもかまわない。第２段階でこ
の再生シート61を、圧空成形、真空成形等により成形し
て成形品62とする。この時に成形品62に小孔63を設け
る。小孔は別工程で機械的に設けてもよいが、成形温度
を高めに設定して再生シートを柔軟にしておき、成形型
の排気孔によつて過度に延伸することにより小孔を形成
すれば、一工程で済む。In FIGS. 3 and 4, in the first step, a resin containing a scrape is melt extruded in a single layer to obtain a single layer recycled sheet 61. The scrap 3 generated in the subsequent process may be recovered and used, but new raw materials may be mixed. In the second stage, this recycled sheet 61 is molded by pressure forming, vacuum forming or the like to obtain a molded product 62. At this time, a small hole 63 is provided in the molded product 62. The small holes may be mechanically provided in a separate process, but the small sheet may be formed by setting the molding temperature to a high level to make the recycled sheet flexible and excessively stretching it by the exhaust holes of the mold. For example, one process is enough.
第３段階では、上記成形品62の内側を雌型として利用
し、別工程で準備されたプラスチツク多層シート１を成
形温度まで加熱して、真空成形、圧空成形等により成形
品62内にさらに熱成形するとともに複合して、しかる後
にトリミングして複合容器７を得る。このとき発生する
スクラツプ３は回収して再生シート61の原料とする。ま
た小孔63は熱圧着するか、シール材を貼着する等によ
り、塞ぐこともできる。In the third stage, the inside of the molded product 62 is used as a female mold, and the plastic multilayer sheet 1 prepared in a separate process is heated to the molding temperature, and further heated in the molded product 62 by vacuum molding, pressure molding or the like. The composite container 7 is obtained by molding and compounding, and then trimming. The scrap 3 generated at this time is collected and used as a raw material for the recycled sheet 61. Further, the small holes 63 can be closed by thermocompression bonding or by sticking a sealing material.
単層押出成形機により、ポリプロピレンと複合容器トリ
ミング後のスクラツプとを1:1の割合で混合した樹脂を
溶融押出成形して厚さ0.5mmの単層の再生シートを得
た。この再生シートはポリプロピレン単体と同等の外観
を有し生産歩留も良好であつた。次にこの再生シート
を、直径70mm、高さ30mmのキヤビテイを有しその底部に
0.2mmの排気孔を有する成形型により、加熱温度180℃で
20秒加熱してから、圧空圧力6kg/cm2で圧空成形し、排
気孔部分に小孔を有する成形品を形成した。Using a single-layer extrusion molding machine, a resin obtained by mixing polypropylene and the scrap after trimming of the composite container in a ratio of 1: 1 was melt-extruded to obtain a 0.5-mm-thick single-layer recycled sheet. This recycled sheet had the same appearance as polypropylene alone and had a good production yield. Next, this recycled sheet has a cavity with a diameter of 70 mm and a height of 30 mm at the bottom.
With a mold with a 0.2 mm exhaust hole, at a heating temperature of 180 ° C
After heating for 20 seconds, air pressure molding was performed at a pressure of 6 kg / cm 2 to form a molded product having small holes in the exhaust holes.
次に、ポリプロピレン／エチレン酢酸ビニル共重合体／
ポリプロピレン（総厚さ0.1mm）の構成を有する共押出
プラスチツク多層シートを、加熱温度170℃で17秒加熱
して、圧空圧力2kg/cm2で前記再生シートの成形品を雌
型として圧空成形し、これをトリミングして複合容器を
得た。生じたスクラツプは回収され再生シートの原料と
して回収される。Next, polypropylene / ethylene vinyl acetate copolymer /
A coextrusion plastic multi-layer sheet having a structure of polypropylene (total thickness 0.1 mm) is heated at a heating temperature of 170 ° C. for 17 seconds, and the molded product of the regenerated sheet is pressure-formed with a pressure of 2 kg / cm 2 as a female mold. Then, this was trimmed to obtain a composite container. The generated scraps are recovered and recovered as a raw material for recycled sheets.
（発明の効果） 本発明は、共押出層を含むプラスチツク多層シートを熱
成形するとともに、再生層を前記多層シートとは別個に
形成して両者を積層させることを特徴とするもので、多
層のプラスチツクシートの共押出成形時に、成形性を阻
害するスクラツプを含有する再生層を共押出しなくてす
むので、安定した共押出成形が行なえ高価なバリヤー層
の薄肉化も容易であるとともに、スクラツプは射出成
形、単層押出のように成形性の悪い原料に適した成形法
により別工程で成形して再生層を形成し、無駄なく補強
層として利用できるという作用効果を奏する。(Effects of the Invention) The present invention is characterized in that a plastic multilayer sheet including a coextrusion layer is thermoformed, and a reproduction layer is formed separately from the multilayer sheet to laminate both layers. When co-extruding plastic sheets, it is not necessary to co-extrude a regenerated layer that contains a scrape that hinders moldability, so stable co-extrusion molding can be performed, and the expensive barrier layer can be easily thinned, and the scrap can also be injected. The regenerated layer can be formed by molding in a separate step by a molding method suitable for a raw material having poor moldability such as molding and single layer extrusion, and it can be used as a reinforcing layer without waste.
第１図は本発明の複合容器の製造方法の１例の流れ図、
第２図は各工程の概略説明図であり、第３図は他の例の
流れ図、第４図はその各工程の概略説明図である。 １……プラスチツク多層シート ３……スクラツプ、６……再生層FIG. 1 is a flow chart of an example of a method for manufacturing a composite container of the present invention,
FIG. 2 is a schematic explanatory diagram of each step, FIG. 3 is a flowchart of another example, and FIG. 4 is a schematic explanatory diagram of each step. 1 ... Plastic multi-layer sheet 3 ... Scrap, 6 ... Regeneration layer
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｂ２９Ｌ 22:00 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification code Office reference number FI technical display area // B29L 22:00
Claims (3)
容器形状に熱成形するとともに、前記多層シートのスク
ラツプを含有する再生層を前記多層シートとは別個に形
成して前記熱成形された多層シートと積層することを特
徴とする複合容器の製造方法1. A thermoformed multilayer sheet in which a plastic multilayer sheet containing a coextrusion layer is thermoformed into a container shape, and a recycled layer containing a scrap of the multilayer sheet is formed separately from the multilayer sheet. And a method for manufacturing a composite container, characterized in that
この熱成形した多層シートの表面に再生層を射出成形し
て積層させることを特徴とする特許請求の範囲第１項に
記載の複合容器の製造方法2. After thermoforming a plastic multilayer sheet,
The method for producing a composite container according to claim 1, wherein a regenerated layer is injection-molded and laminated on the surface of the thermoformed multilayer sheet.
して再生層を形成し、この再生層に孔を設け、しかる後
に再生層内面を雌型として、プラスチツク多層シートを
熱成形して積層させることを特徴とする特許請求の範囲
第１項に記載の複合容器の製造方法3. A single-layer sheet containing a scrape is thermoformed to form a regenerated layer, holes are formed in the regenerated layer, and then, the inner surface of the regenerated layer is used as a female mold to thermoform and laminate the plastic multilayer sheet. The method for manufacturing a composite container according to claim 1, characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25255786A JPH0753429B2 (en) | 1986-10-23 | 1986-10-23 | Manufacturing method of composite container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25255786A JPH0753429B2 (en) | 1986-10-23 | 1986-10-23 | Manufacturing method of composite container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63107523A JPS63107523A (en) | 1988-05-12 |
| JPH0753429B2 true JPH0753429B2 (en) | 1995-06-07 |
Family
ID=17239025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25255786A Expired - Lifetime JPH0753429B2 (en) | 1986-10-23 | 1986-10-23 | Manufacturing method of composite container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0753429B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06106562A (en) * | 1992-09-29 | 1994-04-19 | Nissha Printing Co Ltd | Manufacture of insert molded product |
| US5800759A (en) * | 1992-12-27 | 1998-09-01 | Nissha Printing Co., Ltd. | Insert molded article, and apparatus and method for producing the insert molded article |
| US5443766A (en) * | 1993-09-10 | 1995-08-22 | Plastipak Packaging, Inc. | Method of making multi-layer preform used for plastic blow molding |
-
1986
- 1986-10-23 JP JP25255786A patent/JPH0753429B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63107523A (en) | 1988-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5143778A (en) | Laminate structural plastic material | |
| US4107247A (en) | Method of co-extrusion with foam core | |
| US4076570A (en) | Process for the production of a multiple layer laminate | |
| IE48693B1 (en) | Composite multi-layered polyvinylidene fluoride material and process for its preparation | |
| US4402889A (en) | Making sheet with moisture barrier properties coextruded from scrap materials | |
| EP0503065A4 (en) | Process for producing laminate film | |
| CN1447751A (en) | High moisture barrier films | |
| JPS5881159A (en) | Coextruded sheet and vessel having stiffness | |
| CN111497413A (en) | Machining and forming method of plastic hollow plate with honeycomb holes | |
| JPH0753429B2 (en) | Manufacturing method of composite container | |
| US20030205314A1 (en) | Method for preparing laminating materials | |
| JP3788193B2 (en) | Method for producing a plastic bubble sheet comprising a two-layer film | |
| EP0863809B1 (en) | Method and apparatus for manufacturing packaging items or parts thereof as well as packaging items and parts thereof manufactured according to the method | |
| CA1198562A (en) | Thermoforming coextruded plastic sheets | |
| JPS6049432B2 (en) | Easy-peel film manufacturing method | |
| JPH0562053B2 (en) | ||
| JPH05253965A (en) | Multilayered thin-walled container and production thereof | |
| JP3209232B2 (en) | Method for manufacturing multilayer thin-walled container | |
| JP2002144495A (en) | Laminate, and material for building, sub-material for package, member for automobile and partition using the same | |
| CN111806008A (en) | Modified polyolefin iron-clad film | |
| JPS62271721A (en) | Manufacture of laminated | |
| JPH02252525A (en) | Forming method for synthetic resin laminated sheet | |
| JPS61108548A (en) | Sheet for thermoforming | |
| JPH06238690A (en) | Press molded form of volume-reduced article of thermoplastic resin foam and manufacture thereof | |
| JPS5521279A (en) | Manufacturing method of multilayer resin |