JPH056512B2 - - Google Patents
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- Publication number
- JPH056512B2 JPH056512B2 JP60039905A JP3990585A JPH056512B2 JP H056512 B2 JPH056512 B2 JP H056512B2 JP 60039905 A JP60039905 A JP 60039905A JP 3990585 A JP3990585 A JP 3990585A JP H056512 B2 JPH056512 B2 JP H056512B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- density polyethylene
- layer
- paper
- base material
- 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
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- Cartons (AREA)
- Laminated Bodies (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
「産業上の利用分野」
本発明は紙容器等用複合材料及びその製造方法
に関し、更に詳しくは、折り曲げ加工性に優れた
ミルクカートン、カツプ、冷凍食品容器等に適し
た複合材料及びその製造方法に関するものであ
る。
「従来の技術」「発明が解決しようとする問題点」
従来、ミルクカートン、カツプ、各種冷凍食品
容器等にあつては、紙に低密度ポリエチレンをコ
ーテイングした複合材料が用いられている。しか
し乍ら、この複合材料は耐折り曲げ強度が不十分
で、容器等への折り曲げ加工の際に、クラツクや
クリースが入り、水や湿気の内部浸入を許し、そ
の結果容器の強度を損なうという問題がある。
この欠点を克服するために、折り曲げ加工に対
する強度（以下、耐折強度と記す）を有する樹脂
を低密度ポリエチレンに替えてコーテイングする
方法が考えられるが、かかる耐折強度を有する樹
脂は紙との接着力が乏しく、一挙に押出ラミネー
トする方法は困難で、従つてこれらの樹脂フイル
ムと紙とを接着剤を用いて貼り合わせるか、加熱
ロール等を用いて熱によりこれらのフイルムを溶
融させ紙と貼り合わせる方法に頼らざるを得な
い。しかるに、これらのいずれの方法も先づ耐折
性樹脂フイルムを製造し、次いで紙と貼り合わせ
るという２工程を必要とし、生産効率面で十分と
は云い難く、または接着剤を必要とするから有機
溶剤による労力衛生上の問題や爆発や火災の虞れ
が伴なうという問題を孕んでいる。加えて、加熱
及び乾燥工程が不可欠であるため多大のエネルギ
ーを消費し、また広大な敷地面積を必要とし、そ
れだけ単位敷地当りの生産性を低下させる。
「問題点を解決するための手段」
本発明者らはかかる問題点を解決せんとして鋭
意研究の結果、耐折強度に優れた複合材料及びこ
れを効率的に製造し得る方法を提供するに至つた
ものである。
即ち、本発明の第１は、紙基材の片側又は両側
に、高密度ポリエチレン又はリニアー低密度ポリ
エチレンからなる耐折強度を有する樹脂（以下、
樹脂Ａと記す）の層を配し、その上にリニアー低
密度ポリエチレン又は低密度ポリエチレンからな
る前記樹脂Ａより熱接着性の良い樹脂（以下、樹
脂Ｂと記す）の層を配してなる紙容器等用複合材
料を内容とし、本発明の第２は、紙基材の表面に
樹脂Ａを押出してプレスロールとチルロールとの
間に導き、該チルロールの表面温度を40〜130℃
の範囲にコントロールし乍ら前記基材上に溶融し
た樹脂Ａの層を圧着積層させ、該樹脂の押出しと
同時に又は押出し後に、更に樹脂Ｂの層を設ける
ことを特徴とする紙容器等用複合材料の製造方法
を内容とするものである。
本発明を実施態様を示す図面に基づいて説明す
ると、第１図は紙基材１の片側に耐折強度を有す
る樹脂層２が設けられ、更にその表面に接着性樹
脂層３が設けられている。
第２図は、紙基材１の片側には耐折強度を有す
る樹脂層２、更にその表面に接着性樹脂層３が設
けられ、かつ紙基材１の他の側には接着性樹脂層
３′が設けられている。
本発明における紙基材としては紙容器等に使用
されている全ての紙基材が使用できるが、好まし
くは100〜300ｇ／m2のものが好適である。
本発明における耐折強度を有する樹脂としては
伸びを有し、曲げ弾性率の高い、高密度ポリエチ
レン又はリニアー低密度ポリエチレンが用いら
れ、その樹脂層の厚みとしては10〜100μｍ、好
ましくは15〜50μｍが好適である。
本発明における熱接着性の良い樹脂としては、
リニアー低密度ポリエチレン又は低密度ポリエチ
レンが用いられ、前記耐折強度を有する樹脂より
は耐折性は劣るとしても、熱接着性の優れている
所謂ヒートシール性を有する樹脂で、その樹脂層
の厚みとしては10〜100μｍ、好ましくは15〜50μ
ｍが好適である。
尚、上記耐折強度を有する樹脂又は熱接着性樹
脂は厳密に区別する必要はなく、要は相対的な問
題であるから、上記樹脂の中で適宜組み合わせて
用いても差し支えない。下記の如き組み合せを挙
げることができる。
耐折強度樹脂 熱接着性樹脂
高密度ポリエチレン
リニアー低密度ポリエチレン
リニアー低密度ポリエチレン
低密度ポリエチレン
高密度ポリエチレン 低密度ポリエチレン
本発明の複合材料は紙基材の上に耐折強度を有
する樹脂を押出し、更にその表面に熱接着性樹脂
を押出し圧着積層させる方法が有効である。耐折
強度を有する樹脂を紙基材上にラミネートするに
は、樹脂温度、基材温度、チルロール温度がラミ
ネート接着力に大きな影響を与え、就中、チルロ
ール温度が重要である。
樹脂温度は一般に高くなればなる程基材へのラ
ミネート接着力は向上するが、反面樹脂の解重合
により発煙したり、樹脂の耐衝撃性が低下した
り、押出機内でゲル化する場合があるので、使用
樹脂の耐熱性等を勘案して押出し樹脂温度を決定
する必要がある。
基材温度は高い程ラミネート接着力が向上する
が、基材の熱劣化による性状変化、ラミネート後
のカール等を考慮して決定する必要がある。例え
ば通常のクラフト紙の場合は40〜100℃程度で十
分である。
樹脂温度と基材温度とは相互に影響を与え、従
つて前記した樹脂の種類、基材の種類の他に、こ
れら両温度の関係をも考慮に入れて最適温度がそ
れぞれ決定されるべきである。
ラミネートの厚さは大きくなる程ラミネート接
着力は向上するが、15〜30μｍ程度の薄膜ラミネ
ートの場合、前記樹脂温度と基材温度に設定して
も、通常のチルロール表面温度（20〜30℃）では
ラミネート接着力は弱く、満足し得るラミネート
を得ることができない。
本発明にあつては、チルロールを水、オイル、
埋め込みヒーター、電磁誘導加熱等の熱媒体又は
加熱手段を通じてチルロールの表面温度を通常温
度よりも高く維持する。該温度は使用する樹脂の
種類にも依るが、通常40〜130℃、より好ましく
は45〜120℃の範囲にコントロールする。表面温
度が40℃未満ではチルロール加温効果が不十分と
なり、十分なラミネート接着力が得られず、一方
130℃を越えるとラミネート製品にカールが生じ
る。
尚、耐折強度を有する樹脂層と熱接着性樹脂層
とは前者を押出した後、後者を押出しても良く、
また両者を共押出しにより同時に押出しても良
い。
「実施例」
以下、本発明を実施例、比較例を挙げて説明す
るが、本発明はこれらにより何ら制限されない。
実施例 １
スクリユー径40ｍ／ｍ、Ｌ／Ｄ＝22の押出機を
用い、高密度ポリエチレン樹脂〔昭和電工株式会
社製「LZ−0139−２」、MI＝６ｇ／10分（JIS
K6760、以下、同じ）、密度0.952ｇ／cm3（JIS
K67 60、以下、同じ）〕を40回転のスクリユー回
転で樹脂温度300℃で400ｍ／ｍ巾のコートハンガ
ーダイにてフイルムを押出した。
一方、252.3ｇ／m2の板紙を予め32w・min／m2
のコロナ処理を行ない、ヒーターにて予熱をし、
基材温度を45℃にした。
上記紙基材とフイルムとを50℃に温調した金属
ロールと硬度90のゴムロールとの間を通し、圧着
積層させて高密度ポリエチレンの30μｍの積層紙
を得た。
更に前述と同じ押出機を用い、低密度ポリエチ
レン樹脂〔三井石油化学工業株式会社製、「ミラ
ソンＭ−16p」、MI＝3.7、密度＝0.923ｇ／cm3〕を
40回転のスクリユー回転で樹脂温度290℃で400
ｍ／ｍ巾のコートハンガーダイにてフイルムを押
出した。
高密度ポリエチレン積層紙のフイルム面を予め
32w・min／m2のコロナ処理を行ない、ヒーター
にて予熱し、積層紙温度を45℃にした。次に、該
積層紙と上記低密度ポリエチレンフイルムを20℃
以下に温調した金属ロールと硬度90のゴムロール
との間を通し、圧着積層させて低密度ポリエチレ
ン30μｍ／高密度ポリエチレン30μｍ／板紙252.3
ｇ／m2からなる複合材料を得た。
実施例 ２
実施例１で得た積層複合材料の紙基材面に、実
施例１の低密度ポリエチレン樹脂を同様の操作に
より20μｍの積層を行ない、低密度ポリエチレン
30μｍ／高密度ポリエチレン30μｍ／板紙252.3
ｇ／m2／低密度ポリエチレン20μｍからなる複合
材料を得た。
比較例 １
実施例１と同様にして、低密度ポリエチレン樹
脂を積層し、低密度ポリエチレン60μｍ／板紙
252.3ｇ／m2の複合材料を得た。
比較例 ２
実施例１と同様にして、板紙上に高密度ポリエ
チレン樹脂を積し、高密度ポリエチレン60μｍ／
板紙252.3ｇ／m2の複合材料を得た。
比較例 ３
実施例１と同様にして、板紙の両側に低密度ポ
リエチレン樹脂を積層し、低密度ポリエチレン
60μｍ／板紙252.3ｇ／m2／低密度ポリエチレン
20μｍの複合材料を得た。
上記の如くして得られた複合材料の耐折強度及
びヒートシール性をテストした。その結果を第１
表に示す。
尚、耐折強度、ヒートシールの測定方法は下記
の通りである；
耐折強度テスト：
JIS−P8115に準拠して行なつた。
(株)東洋精機製作所製、MIT形試験機を用い、
15mm巾の試験片に1.0Kgｆの荷重をかけて繰り
返し折り曲げテストを行ない、縦方向、横方向
に切断する迄の折り曲げ回数を測定した（ｎ＝
10）。
ヒートシールテスト：
(株)東洋精機製作所製、片面加熱熱板方式の熱傾
斜試験機により、150℃×７Kg／cm2×1.0秒の条
件でフイルム面同志を接着させた後、剥離テス
トを行なつた。
"Field of Industrial Application" The present invention relates to a composite material for paper containers, etc., and a method for manufacturing the same, and more specifically, a composite material suitable for milk cartons, cups, frozen food containers, etc. with excellent bending properties, and a method for manufacturing the same. It is related to. "Prior Art""Problems to be Solved by the Invention" Conventionally, for milk cartons, cups, various frozen food containers, etc., a composite material made of paper coated with low-density polyethylene has been used. However, this composite material has insufficient bending strength, and when folded into containers, etc., cracks and creases occur, allowing water and moisture to penetrate inside, resulting in a loss of strength of the container. There is. In order to overcome this drawback, a method of coating with a resin that has strength against folding processing (hereinafter referred to as folding strength) may be considered instead of low-density polyethylene. Due to their poor adhesive strength, it is difficult to extrude and laminate them all at once. Therefore, these resin films and paper must be pasted together using an adhesive, or these films can be melted by heat using a heated roll or the like and then laminated with paper. I have no choice but to rely on the pasting method. However, all of these methods require two steps: first manufacturing a fold-resistant resin film and then pasting it with paper, which is difficult to say in terms of production efficiency, or requires an adhesive, making it difficult to use organic materials. This poses problems in terms of labor hygiene and the risk of explosion and fire due to the solvent. In addition, heating and drying processes are essential, which consumes a large amount of energy and requires a large site area, which reduces productivity per unit site. "Means for Solving the Problems" As a result of intensive research aimed at solving these problems, the present inventors have now provided a composite material with excellent folding strength and a method for efficiently manufacturing the same. It is ivy. That is, the first aspect of the present invention is to apply a resin (hereinafter referred to as
A paper made by disposing a layer of resin (hereinafter referred to as resin A) and on top of that a layer of linear low-density polyethylene or a resin having better thermal adhesion than resin A (hereinafter referred to as resin B) made of low-density polyethylene. The second aspect of the present invention, which is a composite material for containers, etc., extrudes resin A onto the surface of a paper base material and introduces it between a press roll and a chill roll, and the surface temperature of the chill roll is raised to 40 to 130°C.
A composite for paper containers, etc., characterized in that a layer of molten resin A is laminated by pressure on the base material while controlling the range of 0.05 to 1.0, and a layer of resin B is further provided at the same time as or after extrusion of the resin. The content is the manufacturing method of the material. To explain the present invention based on drawings showing embodiments, FIG. 1 shows a paper base material 1 in which a resin layer 2 having folding strength is provided on one side, and an adhesive resin layer 3 is further provided on the surface thereof. There is. In FIG. 2, a resin layer 2 having bending strength is provided on one side of a paper base material 1, an adhesive resin layer 3 is provided on the surface thereof, and an adhesive resin layer is provided on the other side of the paper base material 1. 3' is provided. As the paper base material in the present invention, all paper base materials used for paper containers etc. can be used, but those of 100 to 300 g/m 2 are preferred. In the present invention, high-density polyethylene or linear low-density polyethylene, which is elongated and has a high flexural modulus, is used as the resin having bending strength, and the thickness of the resin layer is 10 to 100 μm, preferably 15 to 50 μm. is suitable. In the present invention, resins with good thermal adhesive properties include:
Linear low-density polyethylene or low-density polyethylene is used, and although the folding durability is inferior to the resin with the above-mentioned folding strength, it is a resin that has so-called heat sealing properties that have excellent thermal adhesion properties, and the thickness of the resin layer is 10~100μm, preferably 15~50μm
m is preferred. Incidentally, there is no need to strictly distinguish between the resin having the bending strength and the thermoadhesive resin, and since it is a relative matter, they may be used in appropriate combinations among the above resins. The following combinations can be mentioned. Folding strength resin Heat adhesive resin High density polyethylene
Linear low density polyethylene Linear low density polyethylene
Low-density polyethylene High-density polyethylene Low-density polyethylene An effective method for producing the composite material of the present invention is to extrude a resin having folding strength onto a paper base material, and then extrude and pressure-bond a thermoadhesive resin onto the surface of the resin. In order to laminate a resin having fold-endurance strength onto a paper base material, the resin temperature, the base material temperature, and the chill roll temperature have great effects on the lamination adhesive strength, and the chill roll temperature is especially important. In general, the higher the resin temperature, the better the adhesive strength of the laminate to the base material, but on the other hand, the depolymerization of the resin may cause smoke, the impact resistance of the resin may decrease, or it may gel in the extruder. It is necessary to determine the extrusion resin temperature by taking into consideration the heat resistance of the resin used. The higher the base material temperature, the better the lamination adhesive strength, but it must be determined in consideration of changes in properties due to thermal deterioration of the base material, curling after lamination, etc. For example, in the case of ordinary kraft paper, a temperature of about 40 to 100°C is sufficient. Resin temperature and base material temperature influence each other, and therefore, in addition to the type of resin and base material mentioned above, the relationship between these two temperatures should be taken into consideration when determining the optimal temperature. be. The laminate adhesive strength improves as the laminate thickness increases, but in the case of thin film laminates of about 15 to 30 μm, even if the resin temperature and base material temperature are set above, the normal chill roll surface temperature (20 to 30°C) In this case, the laminate adhesive strength is weak and a satisfactory laminate cannot be obtained. In the present invention, the chill roll is made of water, oil,
The surface temperature of the chill roll is maintained higher than the normal temperature through a heating medium or heating means such as an embedded heater or electromagnetic induction heating. Although the temperature depends on the type of resin used, it is usually controlled within the range of 40 to 130°C, more preferably 45 to 120°C. If the surface temperature is less than 40℃, the chill roll heating effect will be insufficient, and sufficient lamination adhesive strength will not be obtained.
If the temperature exceeds 130℃, curling will occur in the laminate product. In addition, the resin layer having bending strength and the thermoadhesive resin layer may be extruded after extruding the former, and then the latter may be extruded.
Moreover, both may be extruded simultaneously by coextrusion. "Examples" The present invention will be described below with reference to Examples and Comparative Examples, but the present invention is not limited by these in any way. Example 1 Using an extruder with a screw diameter of 40 m/m and L/D = 22, high-density polyethylene resin [LZ-0139-2 manufactured by Showa Denko K.K., MI = 6 g/10 minutes (JIS
K6760 (hereinafter the same), density 0.952g/cm 3 (JIS
K67 60 (hereinafter the same)] was extruded using a coat hanger die with a width of 400 m/m at a resin temperature of 300°C and a screw rotation of 40 revolutions. On the other hand, 252.3g/ m2 paperboard was preheated at 32w・min/ m2.
Perform corona treatment, preheat with a heater,
The substrate temperature was 45°C. The above-mentioned paper base material and film were passed between a metal roll whose temperature was controlled to 50°C and a rubber roll having a hardness of 90, and were laminated under pressure to obtain a 30 μm high-density polyethylene laminated paper. Furthermore, using the same extruder as above, a low-density polyethylene resin [Mitsui Petrochemical Industries, Ltd., "Mirason M-16p", MI = 3.7, density = 0.923 g/cm 3 ] was added.
400 at a resin temperature of 290℃ with a screw rotation of 40
The film was extruded using a coat hanger die with a width of m/m. Prepare the film surface of high-density polyethylene laminated paper in advance.
The paper was subjected to corona treatment at 32 w min/m 2 and preheated with a heater to bring the temperature of the laminated paper to 45°C. Next, the laminated paper and the low density polyethylene film were heated at 20°C.
The following materials were passed between a temperature-controlled metal roll and a rubber roll with a hardness of 90, and then laminated together under pressure to form low-density polyethylene 30 μm/high-density polyethylene 30 μm/paperboard 252.3
A composite material consisting of g/m 2 was obtained. Example 2 The low-density polyethylene resin of Example 1 was laminated to a thickness of 20 μm on the paper base surface of the laminated composite material obtained in Example 1 by the same procedure.
30μm/High density polyethylene 30μm/Paperboard 252.3
A composite material consisting of g/m 2 /20 μm of low density polyethylene was obtained. Comparative Example 1 In the same manner as in Example 1, low density polyethylene resin was laminated, and low density polyethylene 60μm/paperboard was laminated.
A composite material weighing 252.3 g/m 2 was obtained. Comparative Example 2 In the same manner as in Example 1, high-density polyethylene resin was laminated on paperboard, and high-density polyethylene 60μm/
A composite material weighing 252.3 g/m 2 of paperboard was obtained. Comparative Example 3 In the same manner as in Example 1, low-density polyethylene resin was laminated on both sides of paperboard, and low-density polyethylene resin was laminated on both sides of paperboard.
60μm/Paperboard 252.3g/ m2 /Low density polyethylene
A 20 μm composite material was obtained. The folding strength and heat sealability of the composite material obtained as described above were tested. The result is the first
Shown in the table. The method for measuring folding strength and heat sealing is as follows; Folding strength test: Conducted in accordance with JIS-P8115. Using an MIT type testing machine manufactured by Toyo Seiki Seisakusho Co., Ltd.
A test piece with a width of 15 mm was subjected to a repeated bending test by applying a load of 1.0 Kgf, and the number of times it was bent until it was cut in the vertical and horizontal directions was measured (n =
Ten). Heat seal test: After bonding the film surfaces together under the conditions of 150℃ x 7Kg/cm 2 x 1.0 seconds using a single-sided heating hot plate type thermal gradient tester manufactured by Toyo Seiki Seisakusho Co., Ltd., a peel test was performed. Summer.
【表】
「作用及び効果」
叙上の通り、本発明によれば耐折強度を有する
樹脂と熱接着性樹脂とを積層することにより、熱
接着性を低下させることなく耐折強度を高めるこ
とができ、折り曲げ加工性に優れた複合材料を提
供することができる。また、チルロール温度を40
〜130℃に保持することによりラミネート性に乏
しい耐折強度を有する樹脂を押出しラミネート可
能とし、効率的な製造方法を提供するものであ
る。[Table] "Operations and Effects" As described above, according to the present invention, by laminating a resin with folding strength and a thermoadhesive resin, the folding strength can be increased without reducing the thermal adhesiveness. It is possible to provide a composite material with excellent bending processability. Also, increase the chill roll temperature to 40
By maintaining the temperature at ~130°C, it is possible to extrude and laminate a resin having a folding strength that is poor in lamination properties, thereby providing an efficient manufacturing method.
第１図及び第２図はいずれも本発明の複合材料
の実施態様を示す断面図である。
１……紙、２……耐折強度を有する樹脂、３，
３……熱接着性樹脂。
FIG. 1 and FIG. 2 are both sectional views showing embodiments of the composite material of the present invention. 1...Paper, 2...Resin having folding strength, 3,
3...Thermoadhesive resin.
Claims (1)
ン又はリニアー低密度ポリエチレンからなる耐折
強度を有する樹脂（以下、樹脂Ａと記す）の層を
配し、その上にリニアー低密度ポリエチレン又は
低密度ポリエチレンからなる、前記樹脂Ａより熱
接着性の良い樹脂（以下、樹脂Ｂと記す）の層を
配してなる紙容器等用複合材料。 ２ 紙基材の表面に樹脂Ａを押出してプレスロー
ルとチルロールとの間に導き、該チルロールの表
面温度を40〜130℃の範囲にコントロールし乍ら
前記基材上に溶融し樹脂Ａの層を圧着積層させ、
該樹脂の押出しと同時に又は押出し後に、更に樹
脂Ｂの層を設けることを特徴とする紙容器等用複
合材老料製造方法。[Scope of Claims] 1 A layer of a resin having folding strength made of high density polyethylene or linear low density polyethylene (hereinafter referred to as resin A) is arranged on one or both sides of a paper base material, and a layer of a resin having a bending strength made of high density polyethylene or linear low density polyethylene is placed on top of the layer. A composite material for paper containers, etc., comprising a layer of low-density polyethylene or a resin having better thermal adhesion than resin A (hereinafter referred to as resin B), which is made of low-density polyethylene. 2. Extrude resin A onto the surface of a paper base material and guide it between a press roll and a chill roll, and while controlling the surface temperature of the chill roll in the range of 40 to 130°C, melt and form a layer of resin A on the base material. crimped and laminated,
A method for producing a composite aged material for paper containers, etc., characterized in that a layer of resin B is further provided at the same time as or after extrusion of the resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3990585A JPS61197239A (en) | 1985-02-28 | 1985-02-28 | Composite material for paper vessel, etc, and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3990585A JPS61197239A (en) | 1985-02-28 | 1985-02-28 | Composite material for paper vessel, etc, and manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61197239A JPS61197239A (en) | 1986-09-01 |
| JPH056512B2 true JPH056512B2 (en) | 1993-01-26 |
Family
ID=12565971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3990585A Granted JPS61197239A (en) | 1985-02-28 | 1985-02-28 | Composite material for paper vessel, etc, and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61197239A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0366817U (en) * | 1989-11-02 | 1991-06-28 | ||
| JP4788031B2 (en) * | 2000-10-16 | 2011-10-05 | 大日本印刷株式会社 | Laminated material for paper container making and paper container made using the same |
| FI117622B (en) | 2001-07-13 | 2006-12-29 | Stora Enso Oyj | Polymer-coated packaging material for heat sealing, its method of preparation and its use for a sealed package |
| JP2022132175A (en) * | 2021-02-26 | 2022-09-07 | 東洋アルミエコープロダクツ株式会社 | paper container |
| JP7588264B1 (en) * | 2023-12-20 | 2024-11-21 | サカタインクス株式会社 | Bending resistance agent and laminate |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5193870U (en) * | 1975-01-28 | 1976-07-28 | ||
| JPS5215582A (en) * | 1975-07-28 | 1977-02-05 | Sanyo Shiki Kk | Materials for paper containers |
| JPS54136102U (en) * | 1978-03-13 | 1979-09-21 | ||
| CA1157216A (en) * | 1978-09-15 | 1983-11-22 | William F. Briggs | Coextruded thermoplastic stretch-wrap |
| JPS607323Y2 (en) * | 1982-04-06 | 1985-03-11 | 十條製紙株式会社 | Easy-to-open paper containers |
| JPS5978265U (en) * | 1982-11-17 | 1984-05-26 | 凸版印刷株式会社 | Packaging suitable for sterilization work |
| JPS6241803U (en) * | 1985-08-30 | 1987-03-13 |
-
1985
- 1985-02-28 JP JP3990585A patent/JPS61197239A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61197239A (en) | 1986-09-01 |
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