JPH0911419A - Laminated body - Google Patents
Laminated bodyInfo
- Publication number
- JPH0911419A JPH0911419A JP7166497A JP16649795A JPH0911419A JP H0911419 A JPH0911419 A JP H0911419A JP 7166497 A JP7166497 A JP 7166497A JP 16649795 A JP16649795 A JP 16649795A JP H0911419 A JPH0911419 A JP H0911419A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- polypropylene
- weight
- melting point
- sealing
- 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.)
- Granted
Links
- 239000004743 Polypropylene Substances 0.000 claims abstract description 66
- 229920001155 polypropylene Polymers 0.000 claims abstract description 66
- -1 polypropylene Polymers 0.000 claims abstract description 54
- 238000002844 melting Methods 0.000 claims abstract description 21
- 230000008018 melting Effects 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 13
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000000155 melt Substances 0.000 claims abstract description 9
- 239000011256 inorganic filler Substances 0.000 claims abstract description 8
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 8
- 229920005989 resin Polymers 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- 239000004698 Polyethylene Substances 0.000 claims description 11
- 229920000573 polyethylene Polymers 0.000 claims description 8
- 238000007789 sealing Methods 0.000 abstract description 21
- 238000000926 separation method Methods 0.000 abstract 4
- 239000010410 layer Substances 0.000 description 84
- 230000001954 sterilising effect Effects 0.000 description 15
- 238000004659 sterilization and disinfection Methods 0.000 description 15
- 230000032798 delamination Effects 0.000 description 10
- 238000002156 mixing Methods 0.000 description 9
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 7
- 239000012790 adhesive layer Substances 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 238000010030 laminating Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000001771 impaired effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 235000019198 oils Nutrition 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 229920001903 high density polyethylene Polymers 0.000 description 3
- 239000004700 high-density polyethylene Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 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
- 230000007547 defect Effects 0.000 description 2
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 101100160821 Bacillus subtilis (strain 168) yxdJ gene Proteins 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- RZXDTJIXPSCHCI-UHFFFAOYSA-N hexa-1,5-diene-2,5-diol Chemical compound OC(=C)CCC(O)=C RZXDTJIXPSCHCI-UHFFFAOYSA-N 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Landscapes
- Containers Having Bodies Formed In One Piece (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、包装分野、特に容器の
製造に好適に用いられる積層体と、これを用いて製造し
た食品,薬品等を収納、包装する為の密封性、開封性に
優れた易開封性容器に関する。FIELD OF THE INVENTION The present invention relates to the field of packaging, in particular, to a laminate which is preferably used for the production of containers, and a sealing property and an opening property for accommodating and packaging foods, chemicals and the like produced using the same. It relates to an excellent easy-open container.
【0002】[0002]
【従来の技術】食品をプラスチック容器に密封し、高温
の殺菌処理を行い、保存流通する容器が増加している。
また、消費者が使用する際に電子レンジにより加熱する
ケースもあり、内容物が油を含む場合には内容物の温度
が高温になる場合もあり、消費者のニーズとしては調理
における耐熱性、密封性に優れ、さらに開封性が優れて
いる事にある。密封性、易開封性に優れた容器として、
使用時の開封を一般に行われているシール部の剥離で行
うのではなく、容器として、多層容器を用いて、多層容
器の層間を開封剥離面とし、密封性と易開封性を両立さ
れた容器が数多く提案されている(特開昭50−375
98号公報、特公平5−63385号公報、特公平5−
79587号公報)。しかしこれらの容器は、剥離層が
PE(ポリエチレン)であることから、高温処理条件が
120℃が上限であること、特に油分を多く含んでいる
調理食品を充填した場合、剥離層に膨潤が見られるこ
と,および蓋材との密封が高温によるシール層の軟化の
為、破壊される等の欠点があった。これらの欠点を補う
目的で、特公平7−2409号公報に示されているよう
なポリプロピレン系樹脂を最内層として、耐熱性を増し
た層構成の容器が提案され、従来のPE最内層のものに
比較して耐熱性は向上するが、これらの構成では剥離を
可能とさせる為に依然としてPEを中間層として用いて
おり、ある程度の耐熱性の向上は認められるものの、さ
らに高温の殺菌(ex 130℃)になると中間層の軟
化、溶融のため急激に中間層と表面層との間のラミネー
ト強度が低下し、殺菌中に剥離が発生し、密封性が損な
われるという欠点があった。また、容器全体の耐熱性に
おいても通常のポリプロピレンでは変形が生じる為、耐
熱性に優れた材料を使用する必要がある。2. Description of the Related Art There is an increasing number of containers in which foods are sealed in plastic containers, subjected to high temperature sterilization treatment, and stored and distributed.
In addition, there are cases where the product is heated by a microwave oven when it is used by the consumer, and when the content contains oil, the temperature of the content may become high. It has an excellent sealing property and an excellent opening property. As a container with excellent sealing and easy opening properties,
Rather than performing the peeling of the seal portion that is generally performed during use, a multi-layer container is used as the container, and the layers of the multi-layer container are used as the opening / peeling surface, and both the sealing property and the easy-open property are achieved. Have been proposed (Japanese Patent Application Laid-Open No. 50-375).
98, Japanese Patent Publication No. 5-63385, Japanese Patent Publication No. 5-
79587). However, in these containers, since the release layer is PE (polyethylene), the high temperature treatment condition is 120 ° C as the upper limit, and when the cooked food containing a large amount of oil is filled, the release layer shows swelling. However, there was a defect that the seal layer was broken due to the softening of the seal layer due to the high temperature. For the purpose of compensating for these drawbacks, a container having a layer structure in which the heat resistance is increased by using a polypropylene resin as the innermost layer as disclosed in Japanese Patent Publication No. 7-2409 is proposed. Although the heat resistance is improved as compared with the above, PE is still used as an intermediate layer in these constitutions in order to enable peeling, and although some improvement in heat resistance is recognized, sterilization at a higher temperature (ex 130 (° C), the intermediate layer is softened and melted, so that the laminate strength between the intermediate layer and the surface layer is rapidly reduced, peeling occurs during sterilization, and the sealing performance is impaired. Also, with respect to the heat resistance of the entire container, since deformation occurs in ordinary polypropylene, it is necessary to use a material having excellent heat resistance.
【0003】[0003]
【発明が解決しようとする課題】本発明の目的は、ヒー
トシール層と開封剥離層とを別にする易開封性容器の製
造に好適に用いられる積層体であって、開封剥離層(シ
ール層)の易剥離性を確保しつつ、耐熱性、耐油性を有
する積層体を提供するものである。SUMMARY OF THE INVENTION An object of the present invention is a laminate suitable for use in the production of an easily openable container having a heat seal layer and an opening and peeling layer separated from each other, the opening and peeling layer (sealing layer). The present invention provides a laminate having heat resistance and oil resistance while ensuring the easy peelability.
【0004】[0004]
【課題を解決するための手段】本発明者らは、上記目的
を達成する為に鋭意検討を行った結果、易開封性容器の
製造に用いられる積層体を特定な層構成とすることによ
り、前記課題を解決できることを見出し、この知見に基
づいて本発明を完成するに至った。すなわち本発明は、
内側より第1層が融点160℃以上のポリプロピレンで
あるシール層(A)、第2層がポリプロピレン20〜9
0重量%と4メチルペンテン1樹脂80〜10重量%の
混合物よりなる隣接層(B)、第3層が融点160℃以上
であり、メルトインデックス(JIS K6758)1
〜30のポリプロピレンよりなる中間層(C)、最外層
が10重量%〜60重量%の無機フィラーを含むポリプ
ロピレンを主体とする基材層(D)を有し、シール層
(A)のメルトインデックスは中間層(C)のメルトイ
ンデックスの1.1倍以上であり、(A)(B)間の層
間剥離強度が(B)(C)間の層間剥離強度よりも弱く
該剥離強度が0.2〜2.5kg/15mm(引張り速
度 300mm/分)であり少なくとも4層以上からな
ることを特徴とする積層体であり、必要により中間層
(B)が、ポリプロピレン20〜90重量%と4メチルペ
ンテン1樹脂80〜10重量%からなる混合物100重
量部に対し、ポリエチレン又は不飽和カルボン酸変性ポ
リプロピレンを3〜20重量部を添加してなる組成物で
ある積層体であり、好ましくは最内層(A) の厚みが、
5〜100μ以下である積層体である。Means for Solving the Problems As a result of intensive studies to achieve the above-mentioned object, the present inventors have found that a laminate used for producing an easily-openable container has a specific layer structure, It has been found that the above problems can be solved, and the present invention has been completed based on this finding. That is, the present invention
A sealing layer (A) in which the first layer is polypropylene having a melting point of 160 ° C. or higher from the inside, and the second layer is polypropylene 20 to 9
Adjacent layer (B) made of a mixture of 0% by weight and 80% by weight of 4 methylpentene 1 resin, the third layer has a melting point of 160 ° C. or higher, and a melt index (JIS K6758) 1
The intermediate layer (C) made of polypropylene of 30 to 30, the outermost layer having a base material layer (D) mainly composed of polypropylene containing 10 wt% to 60 wt% of inorganic filler, and the melt index of the seal layer (A). Is 1.1 times or more the melt index of the intermediate layer (C), the interlaminar peel strength between (A) and (B) is weaker than the interlaminar peel strength between (B) and (C), and the peel strength is 0. A laminate having a thickness of 2 to 2.5 kg / 15 mm (pulling speed of 300 mm / min) and comprising at least 4 layers, and optionally an intermediate layer.
(B) is obtained by adding 3 to 20 parts by weight of polyethylene or unsaturated carboxylic acid-modified polypropylene to 100 parts by weight of a mixture consisting of 20 to 90% by weight of polypropylene and 80 to 10% by weight of 4-methylpentene 1 resin. It is a laminated body which is a composition, and preferably the thickness of the innermost layer (A) is
It is a laminated body having a thickness of 5 to 100 μm or less.
【0005】本発明の(A)のシール層は融点が160
℃以上のポリプロピレン(以下PPと記す)よりなって
おり、このPPを用いる事により、耐熱性、耐油性を有
する積層体を得ることができる。また、(A)に用いら
れるPPのメルトインデックス(JIS K6758)
は、(C)に用いられるPPの1.1倍より大きい必要
がある。本発明者等はPPのメルトインデックス(以下
MIと記す)の違いにより、隣接層(B)との層間剥離
が制御されることを見いだした。つまり(B)を挟む2
つの層間剥離強度は(B)と隣接するPPのMIの影響
を受け、MIの大きい方の層間剥離強度がより小さくな
ることを見いだした。本発明の場合には、(A)(B)
間で剥離させる必要があり、(A)のMIを(C)のM
Iの1.1倍以上にすると(A)(B)間の層間剥離強
度は(B)(C)間より小さくなり易開封に好適にな
る。また、(A)の厚みは、5〜100μが好ましく、
5μより小さくなると密封不足となり、逆に100μよ
り大きくなると開封感を損ねる恐れがある。使用するP
Pとしては、融点が160℃であり、MIが(C)の
1.1倍以上であれば任意である。蓋とのシール性及び
成形性を考慮して、PPが100重量部に対して3〜2
0重量のポリエチレンをブレンドすることも可能であ
る。またポリエチレンの他に不飽和カルボン酸変性ポリ
オレフィンやエチレン酢酸ビニル等の熱可塑性樹脂のブ
レンドも中間層との耐熱剥離性を損なわない範囲で可能
である。The seal layer (A) of the present invention has a melting point of 160.
It is made of polypropylene (hereinafter referred to as PP) having a temperature of not less than 0 ° C. By using this PP, a laminate having heat resistance and oil resistance can be obtained. Further, the melt index of PP used in (A) (JIS K6758)
Must be greater than 1.1 times the PP used in (C). The present inventors have found that the delamination from the adjacent layer (B) is controlled by the difference in PP melt index (hereinafter referred to as MI). In other words, sandwiching (B) 2
It was found that the two interlaminar peel strengths were affected by the MI of PP adjacent to (B), and the interlaminar peel strength of the larger MI was smaller. In the case of the present invention, (A) and (B)
It is necessary to peel off between (A) MI and (C) M
When it is 1.1 times or more of I, the interlaminar peel strength between (A) and (B) becomes smaller than that between (B) and (C), which is suitable for easy opening. Further, the thickness of (A) is preferably 5 to 100 μ,
If it is smaller than 5 μ, the sealing may be insufficient, and if it is larger than 100 μ, the open feeling may be impaired. P to use
As P, the melting point is 160 ° C., and MI is arbitrary as long as it is 1.1 times or more of (C). Considering the sealing property with the lid and the moldability, PP is 3 to 2 per 100 parts by weight.
It is also possible to blend 0 weight of polyethylene. In addition to polyethylene, blending of a thermoplastic resin such as unsaturated carboxylic acid-modified polyolefin or ethylene vinyl acetate is also possible within a range that does not impair the heat-resistant peeling property with the intermediate layer.
【0006】本発明の(C)の中間層は、積層体の強
度、耐熱性、成形性の保持を目的とする。この層におい
ても耐熱性が必要であり、融点が160℃以上のポリプ
ロピレンが用いられる。また、該中間層の目的の1つと
して隣接層(B)との層間剥離強度の調整もあり、MI
が0.5〜30である必要がある。MIが30以上にな
ると(A)(B)間と(B)(C)間との層間剥離強度
の調整が難しく層間剥離強度の差を設けることが困難と
なる。また、これらの条件を満たすと、成形性等を調整
する目的でポリエチレン等の任意の熱可塑性樹脂をブレ
ンドすることも可能である。本発明の(D)の基材層
は、10〜60重量%の無機フィラーを含むポリプロピ
レンを主体とする。無機フィラーとしては板状、鱗片状
等の形態を有したものとして、例えばタルク、酸化チタ
ン、カオリン、クレー、水酸化アルミニウム、グラファ
イト、ヤリサイト、パライトマイカやこれらの混合物が
上げられ、非鱗片状無機フィラーとして、炭酸カルシウ
ム、ケイ酸カルシウム、酸化マグネシウム、酸化チタ
ン、水酸化マグネシウム、石英粉、炭酸マグネシウム、
石膏マグネシウム等が上げられ、使用に際しては、任意
の単体、あるいは混合物が用いられる。好ましくはマイ
カ、タルク、炭酸カルシウムが好ましい。無機フィラー
の充填量としては、少なすぎると、耐熱性、剛性の向上
がはかれない。また、多すぎると、積層体を製造する際
に困難が生じる為、20重量%〜60重量%の範囲が適
しており、更に好ましくは、30重量%〜50重量%の
範囲内にあるのが好ましい。The intermediate layer (C) of the present invention is intended to maintain the strength, heat resistance and moldability of the laminate. This layer also needs heat resistance, and polypropylene having a melting point of 160 ° C. or higher is used. Further, one of the purposes of the intermediate layer is to adjust the interlaminar peel strength with the adjacent layer (B).
Should be 0.5 to 30. When the MI is 30 or more, it is difficult to adjust the interlaminar peel strength between (A) and (B) and between (B) and (C), and it is difficult to provide a difference in interlaminar peel strength. Further, when these conditions are satisfied, it is possible to blend an arbitrary thermoplastic resin such as polyethylene for the purpose of adjusting moldability and the like. The base layer (D) of the present invention is mainly composed of polypropylene containing 10 to 60% by weight of an inorganic filler. As the inorganic filler having a plate-like, scaly, or the like form, for example, talc, titanium oxide, kaolin, clay, aluminum hydroxide, graphite, yarisite, perlite mica, or a mixture thereof is raised, and a non-scaly inorganic substance. As a filler, calcium carbonate, calcium silicate, magnesium oxide, titanium oxide, magnesium hydroxide, quartz powder, magnesium carbonate,
Gypsum magnesium or the like is used, and when used, any single substance or a mixture is used. Mica, talc and calcium carbonate are preferred. If the filling amount of the inorganic filler is too small, heat resistance and rigidity cannot be improved. Further, if it is too large, it will be difficult to produce a laminate, so that the range of 20% by weight to 60% by weight is suitable, and more preferably the range of 30% by weight to 50% by weight. preferable.
【0007】本発明の(B)の隣接層は、本発明におい
て最も重要な役割を果たすものであり、この層はポリプ
ロピレンと4メチルペンテン1樹脂のブレンド物を主体
とする。ブレンド比は任意であるが、ポリプロピレン量
として90〜20重量%及び4メチルペンテン1樹脂と
して80〜10重量%が好ましいが、最も好適な配合比
はポリプロピレン量として80〜40重量%である。ポ
リプロピレンの量が90重量%以上になると開封が困難
となり、逆に20%以下となると層間剥離強度が弱くな
りデラミネーションをおこす恐れがある。また微妙な層
間剥離強度を調整する為に、ポリエチレンをブレンドす
ることも可能であるが、ブレンド量が多すぎると目的と
する耐熱性を損なう場合があり、ブレンド量としてはポ
リプロピレン100重量部に対して、20重量部を上限
とし、またブレンド量が少ないとその層間剥離強度を調
整することができない為、3重量部を下限とすることが
望ましい。また同様に微妙な層間剥離強度を調整する為
に、不飽和カルボン酸変性ポリプロピレンをブレンドす
ることがあるが、このブレンドについても、ブレンド量
が多すぎると、剥離強度を強め、かつブレンド量が少な
いと層間剥離強度を失うことがある為20重量部以下3
重量部以上が望ましい。The adjacent layer of (B) of the present invention plays the most important role in the present invention, and this layer is mainly composed of a blend of polypropylene and 4-methylpentene-1 resin. The blending ratio is arbitrary, but 90 to 20% by weight as the amount of polypropylene and 80 to 10% by weight as the 4-methylpentene 1 resin are preferable, but the most preferable compounding ratio is 80 to 40% by weight as the amount of polypropylene. If the amount of polypropylene is 90% by weight or more, unsealing becomes difficult, while if it is 20% or less, the delamination strength becomes weak and delamination may occur. It is also possible to blend polyethylene in order to adjust the delicate delamination strength, but if the blending amount is too large, the target heat resistance may be impaired, and the blending amount is based on 100 parts by weight of polypropylene. Therefore, the upper limit is 20 parts by weight, and if the blending amount is small, the interlaminar peel strength cannot be adjusted. Therefore, the lower limit is preferably 3 parts by weight. Similarly, unsaturated carboxylic acid-modified polypropylene may be blended in order to adjust the delicate delamination strength, but with this blend too, if the blending amount is too large, the peeling strength is increased and the blending amount is small. 20 parts by weight or less 3
It is desirable that the amount is more than weight part.
【0008】さらに(A)〜(D)の4層のほかに
(D)層の外側や(C)層と(D)層の間に任意の樹脂
を積層できることができる。積層する樹脂としては、ポ
リカーボネート(PC)、ポリエチレンテレフタレート
(PET)、ポリブチレンテレフタレート(PBT)、
ポリプロピレン(PP)、塩化ビニリデン樹脂(PVD
C)、エチレンビニルアルコール共重合体(EVO
H)、無機物充填ポリプロピレン等がある。また(D)
の外側や(B)層と(C)層の間は単層に限らず、多層
に積層したもの等任意に選択できる。この場合その接着
層(AD)としては不飽和カルボン酸変性ポリプロピレ
ンが好ましい。即ち(D)層の外側や(C)層と(D)
層の間に加える層としては、PP/AD/EVOH/A
D/PP、PP/AD/PVDC/AD/PP等任意に
選択できる。またその他としてはプラスチックに限ら
ず、アルミニウム箔、スチール箔等の金属層も使用する
ことができる。特に積層体の酸素ガスバリア性を向上さ
せる必要がある場合には、エチレンビニルアルコール共
重合体が(D)層の外側や(C)層と(D)層の間に積
層されて用いられ、そのエチレン重合比率としては20
〜50重量%のものが目的にあわせ任意に用いられる。
また、エチレンビニルアルコール共重合体を(C)層と
(D)層との間に用いる場合は、成形性を考慮すると
(C)層の次に(C)層と同じ種類のPPか別の種類の
PPを介して用いると成形性がよくなる。即ち層構成は
A/B/C/PP/AD/EVOH/AD/Dの8層と
するのが好ましい。本発明の層構成は、前記の樹脂を用
いて、共押出,ラミネート加工等で得ることができる。
ラミネート加工としては、エキストルーションラミネー
ト,共押出ラミネート,ドライラミネート,サーマルラ
ミネート等の任意の方法を用いることができる。Further, in addition to the four layers (A) to (D), any resin can be laminated outside the (D) layer or between the (C) layer and the (D) layer. As the resin to be laminated, polycarbonate (PC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT),
Polypropylene (PP), vinylidene chloride resin (PVD
C), ethylene vinyl alcohol copolymer (EVO
H), polypropylene filled with inorganic material, and the like. Also (D)
The outer layer and between the (B) layer and the (C) layer are not limited to a single layer but may be arbitrarily selected such as a multilayer. In this case, unsaturated carboxylic acid-modified polypropylene is preferable as the adhesive layer (AD). That is, the outside of the (D) layer or the (C) layer and the (D) layer
The layers added between the layers are PP / AD / EVOH / A
D / PP, PP / AD / PVDC / AD / PP, etc. can be arbitrarily selected. Other than that, not only plastic but also metal layers such as aluminum foil and steel foil can be used. In particular, when it is necessary to improve the oxygen gas barrier property of the laminate, an ethylene vinyl alcohol copolymer is used by being laminated on the outside of the (D) layer or between the (C) layer and the (D) layer. The ethylene polymerization ratio is 20
Those having a content of up to 50% by weight are optionally used according to the purpose.
Further, when the ethylene vinyl alcohol copolymer is used between the (C) layer and the (D) layer, considering the moldability, the same type of PP as the (C) layer or another PP is provided after the (C) layer. When it is used through the PP of the kind, the moldability is improved. That is, the layer structure is preferably 8 layers of A / B / C / PP / AD / EVOH / AD / D. The layer structure of the present invention can be obtained by coextrusion, laminating or the like using the above resin.
As the laminating process, any method such as extrusion laminating, coextrusion laminating, dry laminating or thermal laminating can be used.
【0009】[0009]
【作用】本発明の最も重要な点は、隣接層(B)である
ポリプロピレンと4メチルペンテン1樹脂をブレンドし
たことにある。ポリプロピレンの融点は通常、ランダム
PPで約150℃,ホモPPで約160 ℃である。一
方4メチルペンテン1の融点は約240℃である。これ
らをブレンドすることにより従来のポリエチレンを主体
とする中間層に比較して、15℃以上の耐熱性を有し、
内容物の温度が殺菌時に高温(例えば140℃以上)に
なっても中間層が軟化および溶融することがない。例え
ば従来のPEのケースと比較すると、最も耐熱性の優れ
たHDPE(高密度ポリエチレン)の融点は135℃付
近である。120℃を越すと軟化が急激に進み、シール
層と中間層の層間剥離強度は、120℃以下では、1.
0〜1.5kg/15mm巾あったものでも、125℃
の熱を一時的にも経験すると剥離強度は0〜0.2kg
/15mmと急激に低下してしまう。この為、125℃
以上の高温である殺菌では、殺菌中の圧力変化が少しで
も蓋材が膨らむような事が生じると、シール層と中間層
は容易に剥離してしまい、密封容器としての形態をとど
められない状態となる。一方、本発明によると中間層を
用いると、130℃以上の高温処理でも中間層自体の耐
熱性が優れている為、前述のような形態になる事はな
く、安定した高温処理が可能となる。更に外層に無機フ
ィラーを充填したPPを用いることにより、積層体全体
の耐熱性と、剛性を向上させることが可能となる。ま
た、無機フィラーを充填することにより、易焼却性にも
優れる。また、ポリプロピレンと4メチルペンテン1樹
脂とのブレンド物を積層した場合に易剥離性を発現す
る。その強度は、ブレンド比により左右されるが、例え
ば混合比がポリプロピレン重量比で50〜90%重量%
の範囲では層間接着強度が0.5〜2.5kg/15kg
の易剥離強度の範囲となる。この為、シール層の剥離は
容易に行う事ができる。The most important point of the present invention is to blend the adjacent layer (B) of polypropylene with 4 methylpentene 1 resin. The melting point of polypropylene is usually about 150 ° C. for random PP and about 160 ° C. for homo PP. On the other hand, the melting point of 4-methylpentene 1 is about 240 ° C. By blending these, it has a heat resistance of 15 ° C or higher as compared with the conventional intermediate layer mainly composed of polyethylene,
Even if the temperature of the contents becomes high (for example, 140 ° C. or higher) during sterilization, the intermediate layer does not soften or melt. For example, the melting point of HDPE (high-density polyethylene), which has the highest heat resistance, is around 135 ° C. as compared with the case of conventional PE. When the temperature exceeds 120 ° C, the softening progresses rapidly, and the interlayer peel strength between the seal layer and the intermediate layer is 1.
Even if the width was 0 to 1.5 kg / 15 mm, it was 125 ° C.
Peeling strength is 0-0.2kg if you experience the heat of
/ 15mm and it will fall sharply. Therefore, 125 ℃
In the above sterilization at high temperature, if the pressure change during sterilization causes the lid material to swell even a little, the seal layer and the intermediate layer are easily peeled off, and the state as a sealed container cannot be maintained. Becomes On the other hand, according to the present invention, when the intermediate layer is used, the heat resistance of the intermediate layer itself is excellent even at a high temperature treatment of 130 ° C. or higher, so that the above-mentioned form does not occur, and stable high temperature treatment becomes possible. . Furthermore, by using PP having the outer layer filled with an inorganic filler, it becomes possible to improve the heat resistance and rigidity of the entire laminate. In addition, by filling with an inorganic filler, the incineration property is excellent. Further, when a blend of polypropylene and 4-methylpentene-1 resin is laminated, easy peeling property is exhibited. The strength depends on the blend ratio, but for example, the mixing ratio is 50 to 90% by weight in terms of polypropylene weight ratio.
In the range of, the interlayer adhesion strength is 0.5-2.5kg / 15kg
Within the range of easy peel strength. Therefore, the peeling of the seal layer can be easily performed.
【0010】本発明の積層体は成形して容器として用い
られ、蓋材とシールされるが、蓋の開封は(A)層と
(B)層の間で行われ、易開封性でなければならない。
従って(A) (B) 間の層間剥離強度が0.2〜2.5kg
/15mm(引張り速度 300mm/分)でなければ
ならず、この時剥離をスムーズに行う為には(C)
(D)間の層間剥離強度も考慮に入れる必要がある。
(B)(C)間の層間剥離強度が(A)(B)間の層間
剥離強度よりも小さい時、層間剥離が(B)(C)間で
行われる場合もあり、開封が安定しない。よって開封を
容易に行うには(A)(B)間の層間剥離強度を(B)
(C)間の層間剥離強度よりも小さくする必要がある。
この為、(A)と(C)に用いるPPのMIを変化させ
ることにより強度を調整することが可能となる。すなわ
ち(A)のPPのMIを(C)のPPのMIより、1.
1倍以上にすることによりこの関係が成立する事を本発
明は見いだした。そのために蓋材のシール層と最内層
(A)とは強固に接着されていなければならず、通常は
蓋材のシール層の材質は最内層(A)の材質と同質か同
じ材料が使用される。更に開封性のきれをよくするため
には最内層(A) の厚みが、5〜100μの範囲である
事が好ましい。(A)の厚みが5μ以下になると密封性
が損なわれ恐れがあり、逆に100μを越えると開封感
が損なわれる恐れがある。The laminate of the present invention is molded and used as a container, and is sealed with a lid material. The lid is opened between the (A) layer and the (B) layer and must be easily opened. I won't.
Therefore, the delamination strength between (A) and (B) is 0.2-2.5kg.
/ 15 mm (pulling speed 300 mm / min), and in order to perform peeling smoothly at this time (C)
It is also necessary to take the delamination strength between (D) into consideration.
When the delamination strength between (B) and (C) is smaller than the delamination strength between (A) and (B), delamination may occur between (B) and (C), and unsealing is not stable. Therefore, to easily open the package, the interlaminar peel strength between (A) and (B) should be (B).
It is necessary to make it smaller than the interlaminar peel strength between (C).
Therefore, the strength can be adjusted by changing the MI of PP used in (A) and (C). That is, the MI of the PP of (A) is set to 1.
The present invention has found that this relationship is established by making the ratio 1 or more. Therefore, the sealing layer of the lid material and the innermost layer (A) must be firmly adhered, and normally, the material of the sealing layer of the lid material is the same or the same as the material of the innermost layer (A). It Furthermore, in order to improve the opening property, the thickness of the innermost layer (A) is preferably in the range of 5 to 100 μm. If the thickness of (A) is 5 μm or less, the sealing property may be impaired, and if it exceeds 100 μ, the unsealing feeling may be impaired.
【0011】[0011]
【実施例】以下、本発明を実施例に基づいて詳細に説明
するが、本発明はこれに限定されるものではない。表1
及び表3には実施例および比較例の積層体構成の構成樹
脂と層の厚みを、表2及び表4には実施例および比較例
の積層体の(A)(B)間の加熱前後のラミネート強
度、(B)(C)間の加熱前後のラミネート強度、各積
層体を用いて作成した容器の殺菌適正,耐内圧性、耐熱
性、開封性を示している。これらの積層体は、別々の押
出機にて混練押出され多層ダイに導かれる共押出法によ
り積層された。The present invention will be described below in detail with reference to examples, but the present invention is not limited to these examples. Table 1
Table 3 shows the constituent resins and layer thicknesses of the laminate structures of Examples and Comparative Examples, and Tables 2 and 4 show the laminates of Examples and Comparative Examples before and after heating between (A) and (B). It shows the laminate strength, the laminate strength before and after heating between (B) and (C), the sterilization suitability, the internal pressure resistance, the heat resistance, and the unsealing property of the container formed by using each laminate. These laminates were laminated by a coextrusion method in which they were kneaded and extruded by separate extruders and introduced into a multi-layer die.
【0012】本実施例及び比較例において使用した樹脂
は下記のとおりである。 ・PP1:ポリプロピレン 融点155℃ MI=0.
5 ・PP2:ポリプロピレン 融点164℃ MI=2.
0 ・PP3:ポリプロピレン 融点162℃ MI=1.
5 ・PP4:ポリプロピレン 融点160℃ MI=3.
0 ・PP5:ポリプロピレン 融点155℃ MI=2.
5 ・PP6:ポリプロピレン 融点153℃ MI=1.
0 ・PP7:ポリプロピレン 融点165℃ MI=3
5.0 ・PP8:ポリプロピレン 融点164℃ MI=2
0.0 ・PP9:ポリプロピレン 融点162℃ MI=4
0.0 ・AD :無水カルボン酸変性ポリプロピレン ・EVOH:エチレンビニルアルコール共重合体 ・MP :4−メチルペンテン1 ・HDPE:高密度ポリエチレン ・変PP:カルボン酸変性ポリプロピレン ・CA :炭酸カルシウムThe resins used in the examples and comparative examples are as follows. -PP1: polypropylene Melting point 155 ° C MI = 0.
5 · PP2: polypropylene Melting point 164 ° C. MI = 2.
0 • PP3: polypropylene Melting point 162 ° C MI = 1.
5 · PP4: polypropylene, melting point 160 ° C. MI = 3.
0 · PP5: polypropylene, melting point 155 ° C. MI = 2.
5 · PP6: polypropylene Melting point 153 ° C. MI = 1.
0 · PP7: polypropylene, melting point 165 ° C., MI = 3
5.0 ・ PP8: polypropylene Melting point 164 ° C. MI = 2
0.0-PP9: polypropylene Melting point 162 ° C. MI = 4
0.0-AD: carboxylic acid anhydride-modified polypropylene-EVOH: ethylene vinyl alcohol copolymer-MP: 4-methylpentene 1-HDPE: high-density polyethylene-modified PP: carboxylic acid-modified polypropylene-CA: calcium carbonate
【0013】本実施例及び比較例における評価は下記方
法で行った。 ・加熱前ラミネート強度:積層体の(A)(B)間及び
(B)(C)間のラミネート強度を測定。 引張り速度 300mm/分。(180度剥離) ・加熱後ラミネート強度:積層体を135度乾熱条件に
て1時間放置しその後、積層体の(A)と(B)間、及
び(B)(C)間のラミネート強度を測定。 引張り速度 300mm/分。(180度剥離) ・殺菌適正(破袋率):実施例および比較例の積層体を
用いて、口径65mmφ、高さ25mm、容量70cc
の丸型容器を真空成形により作成した。容器内に水を9
0%充填し、PET/アルミ箔/PET/PPよりなる
4層構成、厚み100μmの蓋フィルムでヒ―トシ―ル
法により密封した。その後加圧下130℃の熱水中に
て、n=10にて殺菌を行い、殺菌終了後、外観検査に
より水漏れの有無を計数した。分子が水漏れの発生した
数、分母がテスト数。 ・耐内圧性:殺菌適性評価後で殺菌後水漏れのないもの
について、圧縮エアーを漏れないように、蓋材側より注
入し、密封が解除される時の圧力を測定した。 ・耐熱性:殺菌適正で用いた容器内に植物油を90%充
填し、出力500Wの電子レジで2分間加熱を行った。
加熱終了後、容器外観の観察を行い容器に変形の生じて
いるものを不良とし、変形を生じていないものを良とし
た。 ・開封性:殺菌適正で用いた容器を同様の殺菌処理を行
った後に、女性モニターによる開封テストを行った。開
封時に剥離層のカット性が悪く、ヒゲ状のものが発生し
たり、開封がスムーズに行えないものを不良とした。 ・引張弾性率:ASTM D882に従って測定し
た。。The evaluations in the examples and comparative examples were carried out by the following methods. Laminate strength before heating: The laminate strength between (A) and (B) and between (B) and (C) of the laminate is measured. Pulling speed 300 mm / min. (Peeling by 180 degrees) -Lamination strength after heating: The laminate is left under a dry heat condition of 135 degrees for 1 hour and then the laminate strength between (A) and (B) and between (B) and (C) of the laminate. Measure. Pulling speed 300 mm / min. (Peeling by 180 degrees) ・ Suitable sterilization (bag breaking rate): Using the laminates of Examples and Comparative Examples, caliber 65 mmφ, height 25 mm, capacity 70 cc
The round-shaped container was prepared by vacuum forming. 9 water in the container
It was filled with 0% and was sealed by a heat seal method with a lid film having a four-layered structure of PET / aluminum foil / PET / PP and a thickness of 100 μm. After that, sterilization was performed in hot water of 130 ° C. under pressure at n = 10, and after the sterilization was completed, the presence or absence of water leakage was counted by visual inspection. The number of water leaks in the numerator and the number of tests in the denominator. -Internal pressure resistance: After evaluation of sterilization suitability, for those without water leakage after sterilization, compressed air was injected from the lid material side so as not to leak, and the pressure when the sealing was released was measured. -Heat resistance: 90% of vegetable oil was filled in a container used for proper sterilization, and heated at an electronic cash register with an output of 500 W for 2 minutes.
After completion of heating, the appearance of the container was observed, and when the container was deformed, it was evaluated as poor, and when the container was not deformed, it was evaluated as good. -Opening property: A container used for proper sterilization was subjected to the same sterilization treatment, and then an opening test was conducted by a female monitor. The peelability of the release layer was poor at the time of opening, and a whisker-like thing was generated, or a thing which could not be opened smoothly was regarded as a defect. Tensile modulus: measured according to ASTM D882. .
【0014】[0014]
【表1】 [Table 1]
【0015】[0015]
【表2】 [Table 2]
【0016】[0016]
【表3】 [Table 3]
【0017】[0017]
【表4】 [Table 4]
【0018】[0018]
【発明の効果】本発明の積層体は、高温処理後の易開封
性,密封性を安定制御することができる。また、この積
層体から得られた易開封性容器は、密封性及び開封性に
優れ、その実用価値は大である。INDUSTRIAL APPLICABILITY The laminate of the present invention can stably control the easy-opening property and sealing property after high temperature treatment. In addition, the easy-open container obtained from this laminate has excellent sealing and opening properties, and its practical value is great.
───────────────────────────────────────────────────── 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 C08L 23/12 LCF B65D 1/00 A ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display area C08L 23/12 LCF B65D 1/00 A
Claims (3)
リプロピレンであるシール層(A)、第2層がポリプロ
ピレン20〜90重量%と4メチルペンテン1樹脂80
〜10重量%の混合物よりなる隣接層(B)、第3層が融
点160℃以上であり、メルトインデックス0.5〜3
0のポリプロピレンよりなる中間層(C)、最外層が1
0重量%〜60重量%の無機フィラーを含むポリプロピ
レを主体とする基材層(D)を有し、シール層(A)の
メルトインデックスは中間層(C)のメルトインデック
スの1.1倍以上であり、(A)(B)間の層間剥離強
度が(B)(C)間の層間剥離強度よりも弱く該剥離強
度が0.2〜2.5kg/15mm(引張り速度 30
0mm/分)であり少なくとも4層以上からなることを
特徴とする積層体。1. A seal layer (A) in which the first layer is polypropylene having a melting point of 160 ° C. or higher from the inside, and the second layer is 20 to 90% by weight of polypropylene and 4 methylpentene 1 resin 80.
Adjacent layer (B) made of a mixture of 10 to 10% by weight and the third layer have a melting point of 160 ° C. or higher and a melt index of 0.5 to 3
0 middle layer (C) made of polypropylene, outermost layer 1
It has a base material layer (D) mainly composed of polypropylene containing 0% to 60% by weight of an inorganic filler, and the melt index of the seal layer (A) is 1.1 times or more the melt index of the intermediate layer (C). And the interlaminar peel strength between (A) and (B) is weaker than the interlaminar peel strength between (B) and (C), and the peel strength is 0.2 to 2.5 kg / 15 mm (pulling speed 30
0 mm / min) and at least 4 layers or more.
0重量%と4メチルペンテン1樹脂80〜10重量%か
らなる混合物100重量部に対し、ポリエチレン又は不
飽和カルボン酸変性ポリプロピレンを3〜20重量部を
添加してなる組成物である請求項1記載の積層体。2. Adjacent layer (B) is polypropylene 20-9
2. A composition comprising 3 to 20 parts by weight of polyethylene or an unsaturated carboxylic acid-modified polypropylene added to 100 parts by weight of a mixture consisting of 0% by weight and 80 to 10% by weight of 4-methylpentene 1 resin. Stack of.
ある請求項1又は2記載の積層体。3. The laminate according to claim 1, wherein the innermost layer (A) has a thickness of 5 to 100 μm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP07166497A JP3085642B2 (en) | 1995-06-30 | 1995-06-30 | Laminate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP07166497A JP3085642B2 (en) | 1995-06-30 | 1995-06-30 | Laminate |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0911419A true JPH0911419A (en) | 1997-01-14 |
JP3085642B2 JP3085642B2 (en) | 2000-09-11 |
Family
ID=15832467
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP07166497A Expired - Fee Related JP3085642B2 (en) | 1995-06-30 | 1995-06-30 | Laminate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3085642B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013088728A1 (en) | 2011-12-16 | 2013-06-20 | 中本パックス株式会社 | Heat-resistant food container, and manufacturing method for same |
-
1995
- 1995-06-30 JP JP07166497A patent/JP3085642B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013088728A1 (en) | 2011-12-16 | 2013-06-20 | 中本パックス株式会社 | Heat-resistant food container, and manufacturing method for same |
US9828163B2 (en) | 2011-12-16 | 2017-11-28 | Nakamoto Packs Co., Ltd. | Heat-resistant food container and its manufacturing method |
Also Published As
Publication number | Publication date |
---|---|
JP3085642B2 (en) | 2000-09-11 |
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