JP2012024998A - Method and apparatus for manufacturing laminated material, container, and packaging bag - Google Patents
Method and apparatus for manufacturing laminated material, container, and packaging bag Download PDFInfo
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- JP2012024998A JP2012024998A JP2010164471A JP2010164471A JP2012024998A JP 2012024998 A JP2012024998 A JP 2012024998A JP 2010164471 A JP2010164471 A JP 2010164471A JP 2010164471 A JP2010164471 A JP 2010164471A JP 2012024998 A JP2012024998 A JP 2012024998A
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- 239000002648 laminated material Substances 0.000 title claims abstract description 67
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title abstract description 22
- 238000004806 packaging method and process Methods 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 229920005989 resin Polymers 0.000 claims abstract description 16
- 239000011347 resin Substances 0.000 claims abstract description 16
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 12
- 239000000057 synthetic resin Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 31
- 239000012528 membrane Substances 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 abstract description 35
- 230000001070 adhesive effect Effects 0.000 abstract description 35
- 235000013311 vegetables Nutrition 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 15
- 239000002904 solvent Substances 0.000 description 10
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000009820 dry lamination Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 238000003475 lamination Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 229920002799 BoPET Polymers 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920000747 poly(lactic acid) Polymers 0.000 description 3
- 239000004626 polylactic acid Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000009823 thermal lamination Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 235000019645 odor Nutrition 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000005026 oriented polypropylene Substances 0.000 description 1
- 239000004798 oriented polystyrene Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
Landscapes
- Bag Frames (AREA)
- Laminated Bodies (AREA)
Abstract
Description
本発明は、接着剤を全く使用しない積層材料の製造方法、及びこれを可能とする積層材製造装置に関する。 The present invention relates to a method for manufacturing a laminated material that does not use any adhesive, and a laminated material manufacturing apparatus that enables this.
合成樹脂製又は植物由来樹脂製フィルムと、合成樹脂製又は植物由来樹脂製シートとを貼り合わせる手法としては、ドライラミネーション、押出ラミネーション、サーマルラミネーション等の手法が挙げられる。 Examples of the method for bonding the synthetic resin or plant-derived resin film and the synthetic resin or plant-derived resin sheet include methods such as dry lamination, extrusion lamination, and thermal lamination.
ドライラミネーションは、溶媒で溶解した接着剤をいずれかの基材に塗布し、乾燥ゾーンにて乾燥した後、もう一方の基材と加熱ロールで加圧して貼り合わせる手法である。また、押出ラミネーションは、アンカーコート剤（ＡＣ剤）を片方又は両方の基材に塗布し、その基材と貼り合わせるもう一方の基材との間に溶融押出機で溶融した樹脂を押出し、冷却ロールで加圧して貼り合わせる手法である。 Dry lamination is a technique in which an adhesive dissolved in a solvent is applied to one of the substrates, dried in a drying zone, and then bonded to the other substrate by pressing with a heating roll. In extrusion lamination, an anchor coat agent (AC agent) is applied to one or both substrates, and the molten resin is extruded between the substrate and the other substrate to be bonded, and cooled. This is a technique of applying pressure by a roll and bonding.
これらの手法では、一方の基材の被接着面に溶剤系接着剤または水性接着剤を塗布し乾燥により溶剤又は水を蒸散させて、他方の基材の被接着面と重ね合わせて転圧を加えて巻き取り、エージングを行っており、例えば特許文献１に示されるように接着剤が必ず使用されている。 In these methods, a solvent-based adhesive or a water-based adhesive is applied to the adherend surface of one substrate, the solvent or water is evaporated by drying, and the pressure is applied by superimposing it on the adherend surface of the other substrate. In addition, winding and aging are performed. For example, as shown in Patent Document 1, an adhesive is always used.
しかし、基材同士の積層において溶剤系接着剤を使用する場合は、大気汚染の原因になり、大気圏で分解して地球温暖化の原因となる炭酸ガスを生成して堆積することになり、積層ウエブの被接着面に残留して被包装物に臭いを与えるという問題がある。また溶剤系接着剤の使用は、例えば埼玉県条例によれば揮発したトルエン等の溶剤の回収を条件としており、回収できないときは使用不可とする、規制になっている。そこで、水性接着剤の使用が進んでいるが、水が溶媒であり、バインダーポリマーの種類が限定されてくるという問題がある。 However, when using a solvent-based adhesive in the lamination of substrates, it causes air pollution, and carbon dioxide that decomposes in the atmosphere and causes global warming is generated and deposited. There is a problem in that it remains on the adherend surface of the web and gives an odor to the package. Also, the use of solvent-based adhesives is regulated, for example, according to the Saitama Prefecture regulations, on the condition that the solvent such as toluene that has volatilized is recovered and cannot be used when it cannot be recovered. Then, although use of a water-based adhesive is progressing, there exists a problem that water is a solvent and the kind of binder polymer is limited.
さらに溶剤系接着剤と水性接着剤は、いずれの場合も、５００ｍｍ幅で１０００ｍの面積に対して５リットル位の量を使用しており、包材の積層工程において大きなコストを占めている。 Further, in both cases, the solvent-based adhesive and the water-based adhesive use a quantity of about 5 liters with respect to an area of 1000 m with a width of 500 mm, which occupies a large cost in the packaging process.
また、上記のサーマルラミネーションは、熱接着性を有する基材面同士を熱圧着により貼り合わせる手法である。この手法では、基材を選択することによって接着剤を使用せずに基材同士を貼り合わせることが可能であるが、基材間に気泡が入ることによって透明性が悪化することがあり、また、接着の強度を高くするためには高熱で処理しなければならないという問題がある。 Moreover, said thermal lamination is the method of bonding together the base material surfaces which have heat adhesiveness by thermocompression bonding. In this method, it is possible to bond substrates without using an adhesive by selecting a substrate, but transparency may deteriorate due to bubbles entering between the substrates, In order to increase the adhesive strength, there is a problem that the heat treatment must be performed.
本発明は、上記問題点に鑑みて、接着剤を全く使用せずに、透明性、接着強度、かつ再利用性に優れた積層材料の製造方法を提供することを課題とする。
又、本発明は、接着剤を全く使用しない積層材料の製造方法であることにより、接着剤のランニングコストがかからず、更に、大気汚染の原因を解消し、地球温暖化の原因となる炭酸ガスを生成する原因物質の排出を無くし、被包装物に臭いを与えることになっている原因物質が積層ウエブの接着面に残留するのを無くし、揮発したトルエン等の溶剤の回収を条件としている埼玉県条例の規制に見られるように溶剤系接着剤の使用の撤廃に対応することを目的とする。
In view of the above problems, an object of the present invention is to provide a method for producing a laminated material excellent in transparency, adhesive strength, and reusability without using any adhesive.
In addition, the present invention is a method for producing a laminated material that does not use any adhesive, so that the running cost of the adhesive is not required. Further, the cause of air pollution is eliminated, and carbon dioxide that causes global warming. Eliminates the emission of causative substances that generate gas, eliminates causative substances that are supposed to give odors to the package, and is based on the recovery of volatile solvents such as toluene. The purpose is to deal with the elimination of the use of solvent-based adhesives as seen in the regulations of the Saitama Prefecture Ordinance.
本発明者らは上記課題を解決すべく鋭意探求を重ねた結果、基材同士を熱圧着させる際に、基材間に水を介在させることが有効であることを見出し、本発明を完成させた。すなわち、本発明は以下の構成を有する。 As a result of intensive investigations to solve the above-mentioned problems, the present inventors have found that it is effective to interpose water between the substrates when the substrates are thermocompression bonded together, and the present invention has been completed. It was. That is, the present invention has the following configuration.
（１）積層材料を製造するための合成樹脂製又は植物由来樹脂製の少なくとも２枚の膜状物を向かい合わせる工程と、
該膜状物が向かい合う内側に水を介在させる工程と、
該膜状物を、水を介して密着させて積層体を得る工程と、
かつ、
前記密着した積層体を、加熱手段を備えた少なくとも一対の加圧ロール間に通して加熱加圧し、該積層体を連続的に合体接着させる工程とを有する
ことを特徴とする積層材料の製造方法。
（２）前記合体接着させる工程が少なくとも２つの工程からなり、
先の工程が、一対の加圧ロールによって前記密着した積層体を加圧して、該積層体の間の気泡と一部の水を排除する工程であり、
後の工程が、加熱ロールとゴムロールとによって前記密着した積層体を加熱加圧して、該積層体を合体接着させる工程である
ことを特徴とする請求項１に記載の積層材料の製造方法。
（３）前記積層体が２層からなり、膜状物の一方がフィルムであり他方がシートであるか、又は、前記膜状物の両方がフィルムであることを特徴とする上記（１）又は（２）に記載の積層材料の製造方法。
（４）前記積層体が３層からなり、中間の膜状物がシートであり、該シートの両面側の膜状物がフィルムであることを特徴とする上記（１）又は（２）に記載の積層材料の製造方法。
（５）積層材料を製造するための合成樹脂製又は植物由来樹脂製の少なくとも２枚の膜状物を向かい合わせる手段と、
該膜状物の間に水を付与する手段と、
該膜状物を、水を介して密着させて積層体を得る手段と、
かつ、
前記密着した積層体を、加熱手段を備えた少なくとも一対の加圧ロール間に通して加熱加圧し、該積層体を連続的に合体接着させる手段とを有する
ことを特徴とする積層材製造装置。
（６）前記合体接着させる手段が少なくとも２つの手段を備え、
１の手段が、一対の加圧ロールによって前記密着した積層体を加圧して、該積層体の間の気泡と一部の水を排除する手段であり、
２の手段が、加熱ロールとゴムロールとによって前記密着した積層体を加熱加圧して、該積層体を合体接着させる手段である
ことを特徴とする上記（５）に記載の積層材製造装置。
（７）前記積層体が２層からなり、膜状物の一方がフィルムであり他方がシートであるか、又は、前記膜状物の両方がフィルムであることを特徴とする上記（５）又は（６）に記載の積層材製造装置。
（８）前記積層体が３層からなり、中間の膜状物がシートであり、該シートの両面側の膜状物がフィルムであることを特徴とする上記（５）又は（６）に記載の積層材製造装置。
（９）上記（１）〜（４）のいずれかに記載の積層材料の製造方法により製造されたことを特徴とする積層材料。
（１０）上記（９）に記載の積層材料からなることを特徴とする容器。
（１１）上記（１０）に記載の容器で包装されたことを特徴とする包装体。
(1) a step of facing at least two film-like materials made of a synthetic resin or a plant-derived resin for producing a laminated material;
A step of interposing water inside the facing film,
A step of adhering the film-like material through water to obtain a laminate;
And,
A method for producing a laminated material, comprising: a step of heating and pressurizing the adhered laminated body between at least a pair of pressure rolls provided with heating means, and continuously bonding the laminated body together .
(2) The uniting and bonding step includes at least two steps,
The previous step is a step of pressurizing the adhered laminate with a pair of pressure rolls to eliminate bubbles and some water between the laminate,
2. The method for producing a laminated material according to claim 1, wherein the subsequent step is a step of heating and pressurizing the adhered laminated body with a heating roll and a rubber roll to bond the laminated body together.
(3) The laminate (1) or (1), wherein the laminate comprises two layers, and one of the film-like materials is a film and the other is a sheet, or both of the film-like materials are films. The manufacturing method of the laminated material as described in (2).
(4) The laminate as described in (1) or (2) above, wherein the laminate comprises three layers, the intermediate film is a sheet, and the film on both sides of the sheet is a film. A method for producing a laminated material.
(5) means for facing at least two membranes made of a synthetic resin or a plant-derived resin for producing a laminated material;
Means for imparting water between the membranes;
Means for closely attaching the film-like material through water to obtain a laminate;
And,
An apparatus for producing a laminated material, comprising: means for heating and pressurizing the adhered laminated body between at least a pair of pressure rolls provided with heating means, and continuously uniting and bonding the laminated body.
(6) The uniting and bonding means includes at least two means,
1 means is means for pressurizing the adhered laminate with a pair of pressure rolls to eliminate bubbles and some water between the laminates;
The apparatus for producing a laminated material according to the above (5), wherein the means 2 is a means for heating and pressurizing the adhered laminated body with a heating roll and a rubber roll to bond the laminated body together.
(7) The above laminate (5), wherein the laminate comprises two layers, and one of the membranes is a film and the other is a sheet, or both of the membranes are films. The laminated material manufacturing apparatus according to (6).
(8) The layered product is composed of three layers, the intermediate film is a sheet, and the film on both sides of the sheet is a film, as described in (5) or (6) above Laminate production equipment.
(9) A laminated material produced by the method for producing a laminated material according to any one of (1) to (4).
(10) A container comprising the laminated material according to (9) above.
(11) A package packaged in the container according to (10) above.
本発明の積層材料の製造方法により、接着剤を全く使用せずに、水を介在させることで一定の水膜を凹凸のあるフィルム・シートの基材面に形成し、気泡の侵入を抑制し、接着後積層シートの透明性を向上させる。また、加熱圧着時に水を介在させ、加熱ロールを通過させることでフィルムを軟化させ、向かい合うシートの凹凸に沿わせて水と気泡を排除し、面々間の距離を限りなく近づけることによって接着力を向上させるとともに、接着後積層シートの透明性を一層向上させることができる。更に、樹脂製フィルムと樹脂製シートとを加熱圧着する際に水を介在させて面々間の距離を近づけることにより、互いの溶着に必要な熱量を減少させ、より低い接着温度での接着を可能とし、また、水を介在させない場合に比べ、同一温度下での接着強度を高めることができる。更に、本発明の積層材料の製造方法により製造された積層材料からなる容器は、接着剤を使用していなため不純物を含まないのでリサイクル性に優れる。 With the method for producing a laminated material of the present invention, a water film is formed on the substrate surface of an uneven film or sheet by interposing water without using any adhesive, thereby suppressing the intrusion of bubbles. , Improve the transparency of the laminated sheet after bonding. In addition, water is interposed during thermocompression bonding, the film is softened by passing through a heating roll, water and bubbles are eliminated along the concavities and convexities of the facing sheets, and the adhesive force is increased by bringing the distance between the faces as close as possible. While improving, the transparency of the laminated sheet after adhesion can be further improved. In addition, when heat-pressing a resin film and a resin sheet, the amount of heat required for welding each other is reduced by interposing water to make the distance between the faces closer, allowing bonding at a lower bonding temperature. Moreover, compared with the case where water is not interposed, the adhesive strength under the same temperature can be increased. Furthermore, a container made of a laminated material produced by the method for producing a laminated material of the present invention is excellent in recyclability because it contains no impurities because it does not use an adhesive.
本発明に係る積層材料の製造方法は、積層材料を製造するための合成樹脂製又は植物由来樹脂製の少なくとも２枚の膜状物を向かい合わせる工程と、該膜状物が向かい合う内側に水を介在させる工程と、該膜状物を、水を介して密着させて積層体を得る工程と、かつ、前記密着した積層体を、加熱手段を備えた少なくとも一対の加圧ロール間に通して加熱加圧し、該積層体を連続的に合体接着させる工程とを有することを特徴とする。
そして、上記膜状物はシート又はフィルムであり、積層体は少なくともフィルムを有してなる。また、シートが他の膜状物と接する場合には、当該他の膜状物はフィルムである必要があるが、フィルムが他の膜状物と接する場合には、当該他の膜状物はシートであってもフィルムであってもどちらでも構わない。
The method for producing a laminated material according to the present invention comprises a step of facing at least two film-like materials made of a synthetic resin or a plant-derived resin for producing a laminated material, and water on the inner side where the film-like materials face each other. The step of interposing, the step of bringing the film-like material into close contact with each other through water to obtain a laminate, and heating the contacted laminate through at least a pair of pressure rolls equipped with heating means. And pressurizing to continuously unite and bond the laminate.
And the said film-like thing is a sheet | seat or a film, and a laminated body has a film at least. In addition, when the sheet is in contact with another film, the other film needs to be a film, but when the film is in contact with another film, the other film is Either a sheet or a film may be used.
本発明の積層材料の製造方法においては、上記のように、フィルムとシートとの積層に限られず、フィルム同士を積層することも可能である。以下では、フィルムとシートの場合を例にして説明するが、フィルム同士を積層する場合にも同様の方法により積層材料を製造することができる。
また、本発明においては、フィルム同士、又はフィルムとシートとは互いにヒートシール性を有することを必要とするが、ヒートシール性がない場合には、それぞれの膜状物の間に合成樹脂又は植物由来樹脂を塗布してヒートシール性を付与すればよい。本願明細書ではこのようなヒートシール性のない膜状物に合成樹脂又は植物由来樹脂を塗布してヒートシール性を付与して得られる膜状物をも含めてヒートシール性を有する膜状物という。
In the method for producing a laminated material of the present invention, as described above, the present invention is not limited to lamination of a film and a sheet, and films can be laminated. Hereinafter, the case of a film and a sheet will be described as an example. However, even when films are laminated, a laminated material can be manufactured by the same method.
Further, in the present invention, the films or the film and the sheet need to have heat-sealing properties, but when there is no heat-sealing property, a synthetic resin or plant between each film-like material What is necessary is just to apply | coat origin resin and to provide heat sealing property. In the specification of the present application, a film-like material having heat-sealing properties including a film-like material obtained by applying a synthetic resin or a plant-derived resin to a film-like material having no heat-sealing property to impart heat-sealing properties. That's it.
上記フィルムとシートとを熱圧着させる際に、フィルムとシートとが向かい合う内側に水を介在させることで、積層材料の透明性を高めることができる。これは、フィルム及びシートの凹凸面を平滑化し気泡の侵入を抑制するとともに、加熱加圧することでフィルム及びシートを軟化させ、水と気泡を面々間から排除することによる。接着面の気泡が大幅に削減されることで接着後の積層材料の透明性が向上し、印字等の表示をクリアにすることができる。 When the film and the sheet are thermocompression bonded, the transparency of the laminated material can be enhanced by interposing water inside the film and the sheet facing each other. This is because the uneven surfaces of the film and the sheet are smoothed to suppress the invasion of bubbles, and the film and the sheet are softened by heating and pressurizing, so that water and bubbles are excluded from each other. By significantly reducing the bubbles on the bonding surface, the transparency of the laminated material after bonding is improved, and the display such as printing can be cleared.
また、フィルムとシートとの間に水を介在させると、水を介在させない場合に比べて低温度での溶着が可能となる。そして、フィルムとシートとの間に水を介在させると、水を介在させずに同じ温度で溶着させた積層材料と比べて、基材間の接着強度を向上させることができる。 In addition, when water is interposed between the film and the sheet, welding at a lower temperature is possible as compared with the case where water is not interposed. And when water is interposed between the film and the sheet, the adhesive strength between the substrates can be improved as compared with a laminated material welded at the same temperature without water.
上記本発明の積層材料の製造方法により得られた積層材料は接着剤等の不純物を含まないため再利用性に優れた積層材料である。一般に、積層材料を硬質容器として利用する場合には成形加工が行われるが、このときにいわゆる抜きロスが生じる。また、袋として利用する場合には製袋加工が行われるが、その過程においても端材が生じる。これら容器部分とならなかった端材は、回収して再利用したとしても接着剤等の不純物を含むことにより品質低下の原因となるため、廃棄されることが多かった。
これに対して本発明の積層材料の製造方法は、再利用時に不純物の原因となる接着剤等を全く使用しないため、成形加工時や製袋加工時に生じた端材を良好に再利用することができ、コストを大幅に削減することができる。また、印刷されたフィルムを使用する場合においても、端材中の印刷部分を除去することによりインク等の不純物を持ち込まないで再利用することができる。同様に、当該容器に内容物が詰められて包装体として使用された後にも、容器のみを回収して再利用することもできる。
The laminate material obtained by the method for producing a laminate material of the present invention does not contain impurities such as an adhesive, and thus is a laminate material excellent in reusability. In general, when the laminated material is used as a hard container, a molding process is performed. At this time, a so-called punching loss occurs. Moreover, when using as a bag, a bag making process is performed, but an end material also arises in the process. Even if these scraps that did not become container parts are collected and reused, they contain impurities such as adhesives and cause quality deterioration, and are often discarded.
On the other hand, since the method for manufacturing a laminated material of the present invention does not use any adhesive that causes impurities at the time of reuse, the end material generated at the time of molding or bag making should be reused well. And cost can be greatly reduced. Even when a printed film is used, it can be reused without bringing in impurities such as ink by removing the printed portion in the end material. Similarly, even after the container is filled with contents and used as a package, only the container can be collected and reused.
上記フィルムとシートとが向かい合う内側に水を介在させる工程において、水は噴霧、滴下等、公知の方法により付与することができる。また、本発明においてはフィルム又はシートの表面の濡れ性を改質しておく必要は特にない。これは、フィルムとシートとの間に付与された水が、加圧ロール間を通過する際に加えられる圧力によってフィルムとシートとの間に均一に拡げられることによる。 In the step of interposing water inside the film and the sheet facing each other, water can be applied by a known method such as spraying or dropping. In the present invention, it is not particularly necessary to modify the wettability of the film or sheet surface. This is because water imparted between the film and the sheet is uniformly spread between the film and the sheet by the pressure applied when passing between the pressure rolls.
上記水はシート側に付与しても、フィルム側に付与してもどちらでも構わない。また、水の量は製造する積層材料の大きさ（幅）に応じて適宜選択すればよく、シート又はフィルム上に水膜が形成される程度に調整することが好ましい。なお、積層材料がロール間を通過する際に余剰分の水は排除されるため、水が過剰に付与されていても構わない。 The water may be applied on the sheet side or on the film side. Moreover, what is necessary is just to select the quantity of water suitably according to the magnitude | size (width | variety) of the laminated material to manufacture, and it is preferable to adjust to the grade in which a water film is formed on a sheet | seat or a film. In addition, since excess water is excluded when the laminated material passes between the rolls, water may be excessively provided.
上記本発明の積層材料の製造方法において用いる水は、純水、イオン交換水、水道水等を問わない。また、水が主体であれば少量の添加物を加えた場合も含まれる。例えば、僅かな量のアルコール、界面活性剤を添加することもある。積層しようとするフィルムの組み合わせによっては接着強度アップに有効である。 The water used in the method for producing a laminated material of the present invention may be pure water, ion exchange water, tap water or the like. Moreover, the case where a small amount of additives are added if water is the main component is also included. For example, a slight amount of alcohol or surfactant may be added. Depending on the combination of films to be laminated, it is effective for increasing the adhesive strength.
本発明に用いることができる合成樹脂製又は植物由来樹脂製のフィルムとしては、例えば、Ｏ−ＰＥＴ、ＯＰＳ、ＯＰＰ、ＮＹＬＯＮ、ＰＬＡ（ポリ乳酸）が挙げられる。また、フィルムの厚さは、３μｍ〜１００μｍであることが好ましく、９μｍ〜５０μｍであることがより好ましく、１２μｍ〜３０μｍであることが最も好ましい。 Examples of the synthetic resin- or plant-derived resin film that can be used in the present invention include O-PET, OPS, OPP, NYLON, and PLA (polylactic acid). Further, the thickness of the film is preferably 3 μm to 100 μm, more preferably 9 μm to 50 μm, and most preferably 12 μm to 30 μm.
また、上記合成樹脂製又は植物由来樹脂製のシートとしては、例えば、Ａ−ＰＥＴ、ＰＰ、ＰＬＡが挙げられる。また、シートの厚さは、１００μｍ〜１０００μｍであることが好ましく、１５０μｍ〜７００μｍであることがより好ましく、２００μｍ〜５００μｍであることが最も好ましい。 Examples of the synthetic resin or plant-derived resin sheet include A-PET, PP, and PLA. The thickness of the sheet is preferably 100 μm to 1000 μm, more preferably 150 μm to 700 μm, and most preferably 200 μm to 500 μm.
上記フィルムとシートとを合体接着させる工程は、少なくとも２つの工程からなり、先の工程が、一対の加圧ロールによって前記密着したフィルムとシートとを加圧して、該フィルムとシートとの間の気泡と一部の水を排除する工程であり、後の工程が、加熱ロールとゴムロールとによって前記密着したフィルムとシートとを加熱加圧して、該フィルムとシートとを合体接着させる工程であることが好ましい。 The process of uniting and bonding the film and the sheet includes at least two processes, and the previous process presses the adhered film and sheet with a pair of pressure rolls, and between the film and the sheet. It is a step of eliminating air bubbles and a part of water, and the subsequent step is a step of heating and pressurizing the closely adhered film and sheet with a heating roll and a rubber roll to bond the film and the sheet together. Is preferred.
上記先の工程では、上記フィルムとシートとが密着するように圧力がかかるため、水がフィルムとシートの間により均一に拡がり、これと同時にフィルムとシートとの間の気泡が排除される。更に、水が過剰に付与されていた場合には、加圧ロール間を通過することによってフィルムとシートとが密着し、これによってフィルムとシートとの間の余剰分の一部の水が排除される。このためフィルムとシートとがムラなく均一に密着した状態となり、後の工程で加熱加圧されることによって、均質に合体接着される。 In the previous step, since pressure is applied so that the film and the sheet are in close contact with each other, water spreads more uniformly between the film and the sheet, and at the same time, bubbles between the film and the sheet are eliminated. Furthermore, when water is applied excessively, the film and the sheet are brought into close contact with each other by passing between the pressure rolls, thereby eliminating a part of the excess water between the film and the sheet. The For this reason, the film and the sheet are in a state of being uniformly adhered without unevenness, and are united and bonded uniformly by being heated and pressed in a subsequent process.
本発明の積層材料の製造方法においては、前記積層体が２層からなる場合には、膜状物の一方をフィルムとし他方をシートとするか、又は、膜状物の両方をフィルムとすることもできる。また、前記積層体が３層からなる場合には、中間の膜状物をシートとし、該シートの両面側の膜状物をフィルムとすることもできる。 In the method for producing a laminated material of the present invention, when the laminate is composed of two layers, one of the film-like materials is a film and the other is a sheet, or both of the film-like materials are films. You can also. Moreover, when the said laminated body consists of three layers, an intermediate | middle film-form thing can also be used as a sheet | seat, and the film-form substance on the both surfaces side of this sheet | seat can also be used as a film.
本発明に係る積層材製造装置は、合成樹脂製又は植物由来樹脂製の２枚の膜状物を向かい合わせる手段と、該膜状物の間に水を付与する手段と、該膜状物を、水を介して密着させて積層体を得る手段と、かつ、前記密着した積層体を、加熱手段を備えた少なくとも一対の加圧ロール間に通して加熱加圧し、該積層体を連続的に合体接着させる手段とを有することを特徴とする。
そして、上記膜状物はシート又はフィルムであり、積層体は少なくともフィルムを有してなる。また、シートが他の膜状物と接する場合には、当該他の膜状物はフィルムである必要があるが、フィルムが他の膜状物と接する場合には、当該他の膜状物はシートであってもフィルムであってもどちらでも構わない。
The laminated material manufacturing apparatus according to the present invention comprises means for facing two film-like materials made of synthetic resin or plant-derived resin, means for imparting water between the film-like materials, and the film-like material. A means for obtaining a laminated body by closely adhering through water, and heating and pressurizing the adhered laminated body through at least a pair of pressure rolls provided with heating means, and continuously And a unit for bonding them together.
And the said film-like thing is a sheet | seat or a film, and a laminated body has a film at least. In addition, when the sheet is in contact with another film, the other film needs to be a film, but when the film is in contact with another film, the other film is Either a sheet or a film may be used.
本発明の積層材製造装置は、上記のように、フィルムとシートとを積層する構成に限られず、フィルム同士を積層する構成にすることも可能である。以下では、フィルムとシートの場合を例にして説明するが、積層材製造装置が同様の手段を備えていることにより、フィルム同士の積層材料を製造可能な積層材製造装置にすることができる。 The laminated material manufacturing apparatus of the present invention is not limited to the configuration in which the film and the sheet are laminated as described above, and can be configured to laminate the films. Below, although the case of a film and a sheet | seat is demonstrated as an example, when a laminated material manufacturing apparatus is equipped with the same means, it can be set as the laminated material manufacturing apparatus which can manufacture the laminated material of films.
前記合体接着させる手段は、少なくとも２つの手段を備え、１の手段が、一対の加圧ロールによって前記密着したフィルムとシートとを加圧して、該フィルムとシートとの間の気泡と一部の水を排除する手段であり、２の手段が、加熱ロールとゴムロールとによって前記密着したフィルムとシートとを加熱加圧して、該フィルムとシートとを合体接着させる手段であることが好ましい。 The uniting and bonding unit includes at least two units, and one unit presses the adhered film and sheet with a pair of pressure rolls so that a bubble between the film and the sheet and some It is a means for removing water, and the second means is preferably means for heating and pressurizing the tightly adhered film and sheet with a heating roll and a rubber roll to bond the film and the sheet together.
本発明に係る積層材製造装置の一例の概略を図１に示す。これにより上記本発明の積層材料の製造方法の実施が可能となる。
図１の装置では、フィルムとシートとがそれぞれガイドロールに導かれながら接近して向かい合わされる。そして、フィルムとシートとが向かい合う側のシート上の面に水が付与される。そして、当該向かい合うフィルムとシートとをゴムロール間に通して圧力をかけ、フィルムとシートとを密着させることにより、水を均一に拡げてフィルムとシート間の気泡を排除し、それと同時に余剰分の一部の水も排除される。
続いて加熱ロールとゴムロールとの間を通されることにより加熱圧着され、フィルムとシートとが良好に合体接着される。加熱ロールはフィルム面が通過する側に設けられていることが好ましい。これは、シートを溶かす熱量よりもフィルムを溶かす熱量の方が少なくて済むからである。
FIG. 1 shows an outline of an example of a laminated material manufacturing apparatus according to the present invention. Thereby, the manufacturing method of the laminated material of the present invention can be carried out.
In the apparatus of FIG. 1, the film and the sheet are brought close to each other while being guided by the guide rolls. And water is provided to the surface on the sheet on the side where the film and the sheet face each other. Then, the film and the sheet facing each other are passed through a rubber roll to apply pressure, and the film and the sheet are brought into close contact with each other, thereby uniformly spreading water and eliminating bubbles between the film and the sheet. Some water is also eliminated.
Subsequently, the film is hot-pressed by passing between the heating roll and the rubber roll, and the film and the sheet are well bonded. The heating roll is preferably provided on the side through which the film surface passes. This is because less heat is required to melt the film than to heat the sheet.
本発明の積層材料の製造方法により製造された積層材料は、容器として用いることができる。本発明で容器とは、本発明の積層材料を成形加工して得られる硬質容器と、製袋加工して得られる袋の両者を含む広い概念を意味する。このように容器として用いる場合には、多くの場合積層接着面に印刷が行われる。 The laminated material produced by the method for producing a laminated material of the present invention can be used as a container. The container in the present invention means a broad concept including both a hard container obtained by molding the laminated material of the present invention and a bag obtained by bag making. When used as a container in this way, in many cases, printing is performed on the laminated adhesive surface.
しかし、上記のように本発明によれば、水によりフィルムとシートとの間の空気が排除されるためフィルムとシートとの接着強度を高めることができる。更に、フィルムとシートとの間には微小な気泡も残らないため得られた積層材料は透明性に優れ、上記のように印刷面を有する容器として用いられた場合にも印刷面をクリアにすることができる。 However, according to the present invention as described above, since the air between the film and the sheet is eliminated by water, the adhesive strength between the film and the sheet can be increased. In addition, since the microbubbles do not remain between the film and the sheet, the obtained laminated material is excellent in transparency and clears the printed surface even when used as a container having a printed surface as described above. be able to.
本発明の積層材製造装置においては、２層構成の積層材を製造する場合には、膜状物の一方をフィルムとし他方をシートとするか、又は、膜状物の両方をフィルムとする構成にすることもできる。また、３層構成の積層材を製造する場合には、中間の膜状物をシートとし、該シートの両面側の膜状物をフィルムとする構成にすることもできる。 In the laminated material production apparatus of the present invention, when producing a laminated material having a two-layer structure, one of the film-like materials is a film and the other is a sheet, or both of the film-like materials are films. It can also be. Moreover, when manufacturing the laminated material of a 3 layer structure, it can also be set as the structure which uses an intermediate film-like material as a sheet | seat, and uses the film-like material of the both surfaces side of this sheet | seat as a film.
［実施例１］
ラミネーターを用いて以下の表１の構成のサンプルを作製した。ラミネーターの温度目盛りを１〜４まで変更し、それぞれ表２の温度（７０〜１３５℃）でサンプルを作製した。また各々、フィルムとシートの間に水を含ませるもの、含ませないものの２種類のサンプルを作製した。水はフィルムとシートとの間に滴下することにより付与した。
[Example 1]
The sample of the structure of the following Table 1 was produced using the laminator. The temperature scale of the laminator was changed from 1 to 4, and samples were prepared at the temperatures shown in Table 2 (70 to 135 ° C.), respectively. In addition, two types of samples were prepared, one containing water and the other not containing water between the film and the sheet. Water was applied by dropping between the film and the sheet.
上記で作製した各サンプルのラミネート強度を測定した。
測定条件は、検体幅を１５ｍｍとし、剥離速度３００ｍｍ／ｍｉｎ、剥離角度１８０°で行った。
測定結果を、表２及び図２のグラフに示す。
The laminate strength of each sample prepared above was measured.
The measurement conditions were a specimen width of 15 mm, a peeling speed of 300 mm / min, and a peeling angle of 180 °.
The measurement results are shown in Table 2 and the graph of FIG.
上記結果より、一定以上の温度で加熱加圧された場合、水を介在させることにより接着強度を高められることが示された。この傾向は、無地面同士の場合、及び印刷が有る場合のいずれにも見られた。 From the above results, it was shown that, when heated and pressurized at a certain temperature or higher, the adhesive strength can be increased by interposing water. This tendency was seen both in the case of non-grounds and in the case of printing.
［実施例２］
２層構成のラミネートシートと３層構成のラミネートシートを作製し、それぞれの透明度を測定した。２層シートの構成は、「Ａ−ＰＥＴシート（２５０μｍ）／Ｏ−ＰＥＴフィルム（１２μｍ）」とし、３層シートの構成は、「Ｏ−ＰＥＴフィルム（１２μｍ）／Ａ−ＰＥＴシート（２５０μｍ）／Ｏ−ＰＥＴフィルム（１２μｍ）」とした。
これらの２種に対してラミネート方法を変えたもの（水と熱・熱のみ・ドライラミネーション（接着剤））を作製し、それぞれ透明性がどれだけ変化するかについて検証を行った。また、それぞれの基材の透明性、及び各基材を接着させずに、重ねただけの状態の透明性も測定した。
なお、水は滴下により付与した。また、ドライラミネーションにおいてはＤＩＣ社製エーテル系接着剤を使用した。
[Example 2]
A two-layer laminate sheet and a three-layer laminate sheet were prepared, and the transparency of each was measured. The configuration of the two-layer sheet is “A-PET sheet (250 μm) / O-PET film (12 μm)”, and the configuration of the three-layer sheet is “O-PET film (12 μm) / A-PET sheet (250 μm) / O-PET film (12 μm) ”.
These two types were prepared by changing the lamination method (water and heat / heat only / dry lamination (adhesive)), and verified how much the transparency changes respectively. Moreover, the transparency of each base material and the transparency of the state of having just piled up without bonding each base material were also measured.
Water was added dropwise. In dry lamination, an ether adhesive manufactured by DIC was used.
透明性（ヘイズ）測定方法
ＨＧＭ−２Ｂ（スガ試験機製）を用いて、ＪＩＳ Ｋ７１０５準拠にて行った。
Transparency (haze) measurement method It was performed according to JIS K7105 using HGM-2B (manufactured by Suga Test Instruments).
測定結果
Ｈaze（曇り度）は、全光線透過率に対する拡散透過率の比として定義され、以下の式により表わされる。
ヘイズ（％）＝１００×拡散透過率（Ｔｄ）÷全光線透過率（Ｔｔ）
測定結果を表３、４に示す。
Measurement result Haze (cloudiness) is defined as the ratio of diffuse transmittance to total light transmittance, and is expressed by the following equation.
Haze (%) = 100 × diffuse transmittance (Td) ÷ total light transmittance (Tt)
The measurement results are shown in Tables 3 and 4.
上記のように、２層構成のシート及び３層構成のシートとも、本発明の製造方法により作製した積層シート（表中の「水あり」）は、重ねるのみのもの、サーマルラミネーションにより作製した積層シート（表中の「水なし」）、及びドライラミネーションにより作製した積層シート（表中の「ドライラミ」）よりも透明性が高かった。 As described above, in both the two-layered sheet and the three-layered sheet, the laminated sheet ("with water" in the table) prepared by the manufacturing method of the present invention is a layered sheet prepared only by stacking or thermal lamination. It was more transparent than the sheet (“no water” in the table) and the laminated sheet prepared by dry lamination (“dry lamination” in the table).
本発明の積層材料の製造方法によって得られた積層材料は透明性及び接着強度に優れるとともに接着剤を使用していないことから再利用性にも優れているため包装材料とし好適に使用することができる。 The laminate material obtained by the method for producing a laminate material of the present invention is excellent in transparency and adhesive strength, and also has excellent reusability because it does not use an adhesive, so it can be suitably used as a packaging material. it can.
Claims (11)
該膜状物が向かい合う内側に水を介在させる工程と、
該膜状物を、水を介して密着させて積層体を得る工程と、
かつ、
前記密着した積層体を、加熱手段を備えた少なくとも一対の加圧ロール間に通して加熱加圧し、該積層体を連続的に合体接着させる工程とを有する
ことを特徴とする積層材料の製造方法。 A step of facing at least two membranes made of a synthetic resin or a plant-derived resin for producing a laminated material;
A step of interposing water inside the facing film,
A step of adhering the film-like material through water to obtain a laminate;
And,
A method for producing a laminated material, comprising: a step of heating and pressurizing the adhered laminated body between at least a pair of pressure rolls provided with heating means, and continuously bonding the laminated body together .
先の工程が、一対の加圧ロールによって前記密着した積層体を加圧して、該積層体の間の気泡と一部の水を排除する工程であり、
後の工程が、加熱ロールとゴムロールとによって前記密着した積層体を加熱加圧して、該積層体を合体接着させる工程である
ことを特徴とする請求項１に記載の積層材料の製造方法。 The uniting and bonding step includes at least two steps,
The previous step is a step of pressurizing the adhered laminate with a pair of pressure rolls to eliminate bubbles and some water between the laminate,
2. The method for producing a laminated material according to claim 1, wherein the subsequent step is a step of heating and pressurizing the adhered laminated body with a heating roll and a rubber roll to bond the laminated body together.
該膜状物の間に水を付与する手段と、
該膜状物を、水を介して密着させて積層体を得る手段と、
かつ、
前記密着した積層体を、加熱手段を備えた少なくとも一対の加圧ロール間に通して加熱加圧し、該積層体を連続的に合体接着させる手段とを有する
ことを特徴とする積層材製造装置。 Means for facing at least two membranes made of synthetic resin or plant-derived resin for producing a laminated material;
Means for imparting water between the membranes;
Means for closely attaching the film-like material through water to obtain a laminate;
And,
An apparatus for producing a laminated material, comprising: means for heating and pressurizing the adhered laminated body between at least a pair of pressure rolls provided with heating means, and continuously uniting and bonding the laminated body.
１の手段が、一対の加圧ロールによって前記密着した積層体を加圧して、該積層体の間の気泡と一部の水を排除する手段であり、
２の手段が、加熱ロールとゴムロールとによって前記密着した積層体を加熱加圧して、該積層体を合体接着させる手段である
ことを特徴とする請求項５に記載の積層材製造装置。 The united bonding means comprises at least two means;
1 means is means for pressurizing the adhered laminate with a pair of pressure rolls to eliminate bubbles and some water between the laminates;
6. The laminated material manufacturing apparatus according to claim 5, wherein the second means is means for heating and pressurizing the adhered laminated body with a heating roll and a rubber roll to bond the laminated body together.
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| JP2020183252A (en) * | 2019-04-27 | 2020-11-12 | 進栄化成株式会社 | Bag container, recycling method, and laminating method |
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