JPH02204035A - Multi-layered sheet - Google Patents
Multi-layered sheetInfo
- Publication number
- JPH02204035A JPH02204035A JP2265789A JP2265789A JPH02204035A JP H02204035 A JPH02204035 A JP H02204035A JP 2265789 A JP2265789 A JP 2265789A JP 2265789 A JP2265789 A JP 2265789A JP H02204035 A JPH02204035 A JP H02204035A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- same
- resin
- sheet
- property
- 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.)
- Pending
Links
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 22
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 239000004840 adhesive resin Substances 0.000 claims abstract description 7
- 229920006223 adhesive resin Polymers 0.000 claims abstract description 7
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 7
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 7
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 6
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 6
- 229920001384 propylene homopolymer Polymers 0.000 claims abstract description 4
- 230000014759 maintenance of location Effects 0.000 claims description 5
- 239000003205 fragrance Substances 0.000 claims description 3
- 235000013305 food Nutrition 0.000 abstract description 7
- 239000000155 melt Substances 0.000 abstract description 7
- 239000000796 flavoring agent Substances 0.000 abstract description 5
- 235000019634 flavors Nutrition 0.000 abstract description 5
- 229920001577 copolymer Polymers 0.000 abstract description 4
- 239000000178 monomer Substances 0.000 abstract description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 abstract description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 abstract description 2
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 abstract 1
- 238000010030 laminating Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 33
- 239000004743 Polypropylene Substances 0.000 description 12
- 229920001155 polypropylene Polymers 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 7
- 229920001519 homopolymer Polymers 0.000 description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 3
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 description 3
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 3
- 229920001225 polyester resin Polymers 0.000 description 3
- 239000004645 polyester resin Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 235000015110 jellies Nutrition 0.000 description 2
- 239000008274 jelly Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 229920006346 thermoplastic polyester elastomer Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 240000000662 Anethum graveolens Species 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野）
本発明は良好な、保香性、易開封性、密封性を有し、且
つ内容物の食品、薬品の保存性に優れた容器を得る為の
多層シートに関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a container that has good aroma retention, easy opening, and sealing properties, and has excellent preservation of food and medicine contents. The present invention relates to a multilayer sheet for
ゼリー、水手かん、シャーベット等の容器とし覧
始めており、経済性及び見映えの良さから採用は拡がる
１頃向にある。They are starting to be used as containers for jelly, water cans, sherbet, etc., and their use is likely to expand due to their economic efficiency and good appearance.
こうした目的の容器を得る為の多層シートとしては、最
外層としてポリプロピレンを有し、接着層を介してエチ
レン−酢酸ビニル共重合体のケン化物を有し接着層を介
して最内層ポリプロピレンからなる構成のシートが一般
的である。A multilayer sheet for obtaining a container for this purpose has a structure having polypropylene as the outermost layer, a saponified product of ethylene-vinyl acetate copolymer via an adhesive layer, and polypropylene as the innermost layer via an adhesive layer. sheets are common.
この構成では食品の保存性が影響を及ぼす酸素のバリヤ
層としては中心層であるエチレン酢酸ビニル共重合体の
ケン化物が該当し、水分のバリヤ層としてはポリプロピ
レンが主として該当する。In this configuration, the oxygen barrier layer that affects the storage stability of the food is the saponified product of ethylene-vinyl acetate copolymer, which is the center layer, and the moisture barrier layer is mainly polypropylene.
一方、こうした容器を得る為のシートとしては熱成形時
のメルトテンシランが大きいこと及び保管、運送に必要
な腰を持つこと等が必要であり、これらの緒特性を満た
す為には、使用しうるポリプロピレンとしては２３０″
Ｃにおけるメルトフロ−インデックスがＩｇ／１０分以
下のホモポリマーを使用するのが一般的である。On the other hand, the sheets used to obtain such containers need to have a large melt tensile strength during thermoforming and have the necessary stiffness for storage and transportation. 230″ for wet polypropylene
It is common to use a homopolymer having a melt flow index at C of Ig/10 minutes or less.
ところが、こうした容器にゼリー、永年かん、シャーベ
ット等の食品を充填し蓋材とシールした時、食品の香り
がポリプロピレン層に吸着し、風味、味覚を損なう等の
問題があり内容物によってＪし
は、実用出来ていなかった。However, when these containers are filled with food such as jelly, canteen, sherbet, etc. and sealed with the lid material, the aroma of the food is adsorbed to the polypropylene layer, impairing the flavor and taste. , it was not practical.
本発明は、熱成形が可能で且つ良好な保香性、易開封性
、密封性を有し内容物の食品、薬品の保存性に優れた容
器用の多層シートを得る為、種々研究した結果、次のよ
うな積層体を発明するに至ったのである。The present invention was developed as a result of various studies to obtain a multilayer sheet for containers that can be thermoformed, has good aroma retention, easy opening, and sealing properties, and has excellent preservation of food and medicine contents. They came up with the following laminate.
［ｉ！！題を解決するための手段］
本発明は、容器の外側第１層が２３０ ’Ｃに於るメル
トフローインデックスＩｇ／１０分以下のプロピレンホ
モポリマー、第２層が接着性樹脂、第３８１がエチレン
−酢酸ビニル共重合体のケン化物（以下ＥＶＯＨと略記
する）、第４層が接着性樹脂、第５層が第１層と同様の
プロピレンモノマー最内側シール面に当たる第６層が、
ポリエチレンテレフタレート（以下ＰＥＴと略記する）
系樹脂からなることを特徴とする保香性、易開封性、密
封性良好な容器用多層シートに関するものである。[i! ! [Means for Solving the Problems] The present invention provides a method in which the first outer layer of the container is a propylene homopolymer having a melt flow index of Ig/10 minutes or less at 230'C, the second layer is an adhesive resin, and the third layer is an ethylene homopolymer. -Saponified vinyl acetate copolymer (hereinafter abbreviated as EVOH), the fourth layer is an adhesive resin, and the fifth layer is a propylene monomer similar to the first layer.The sixth layer is the innermost sealing surface,
Polyethylene terephthalate (hereinafter abbreviated as PET)
The present invention relates to a multilayer sheet for containers, which is characterized by being made of a resin-based resin and has good fragrance retention, easy opening, and sealing properties.
本発明において用いられるポリプロピレン（以下ＰＰと
略記する〕としては、２３０℃におけるメルトフローイ
ンデックスがＩｇ／ｌｏ分以下のホモポリマーが望まし
い。メルトフローインデックスがＩｇ／１０分以上にな
ると、熱成形時のメルトテンションが弱くなり成形時の
トラブルにより良好な容器を得られない場合が多い、又
耐熱性を必要とする時は、ホモポリマーが望ましいが、
これらの特性を害さない程度であればエチレン等の他の
オレフィンの混合系あるいは共重合体を用いても良い。The polypropylene (hereinafter abbreviated as PP) used in the present invention is preferably a homopolymer with a melt flow index of Ig/lo min or less at 230°C. Homopolymers are preferable when melt tension is weakened and problems occur during molding, making it difficult to obtain good containers, or when heat resistance is required.
Mixtures or copolymers of other olefins such as ethylene may be used as long as these properties are not impaired.
本発明において用いられる接着層としては、特に限定し
ないが、エチレン−酢酸ビニル共重合体とポリプロピレ
ンともに接着性のよい無水マレイン酸変性ポリプロピレ
ンが望ましい。The adhesive layer used in the present invention is not particularly limited, but maleic anhydride-modified polypropylene, which has good adhesion to both ethylene-vinyl acetate copolymer and polypropylene, is desirable.
尚、耐熱性が必要な場合、変性ポリプロピレンの１９０
℃におけるメルトフローインデックスは７ｇ／１０分以
下であることが望ましく、メルトフローインデックスが
高すぎると、耐熱性が落ち、成形時等にデラミネーシヨ
ンの恐れがある。If heat resistance is required, modified polypropylene 190
The melt flow index at °C is desirably 7 g/10 minutes or less; if the melt flow index is too high, the heat resistance decreases and there is a risk of delamination during molding.
本発明に用いられるＥＶＯＨとしては市販されているエ
チレン比率２０〜６０モル％の中から、用途目的によっ
て使いわけることが出来る。The EVOH used in the present invention can be selected from commercially available EVOH having an ethylene ratio of 20 to 60 mol% depending on the purpose of use.
本発明に用いられるＰＥＴ系樹脂とは一般に市販されて
いる極限粘度（以下ＩＶと略す）値、０゜６〜１．４が
用いられるが、ポリプロピレンとの接着強度を上げる為
に熱可塑性共重合ポリエステル樹脂、熱可塑性ポリエス
テルエラストマー等の樹脂を１〜９５％、目的に応じて
ブレンドしでもかまわない、尚、この時、ＰＥＴ樹脂、
ポリエステル系樹脂は、加水分解を防ぐ為、水分率３０
ｐｐｍ以下にコントロールする必要がある。The PET resin used in the present invention is generally commercially available with an intrinsic viscosity (hereinafter abbreviated as IV) value of 0°6 to 1.4, but in order to increase the adhesive strength with polypropylene, thermoplastic copolymerization is used. Depending on the purpose, 1 to 95% of resin such as polyester resin, thermoplastic polyester elastomer, etc. may be blended.In addition, in this case, PET resin,
Polyester resin has a moisture content of 30 to prevent hydrolysis.
It is necessary to control it to below ppm.
本発明の積層シートの製造方法としては積層時の接着強
度が良好である共押出し法を採用したがドライラミネー
ト法、押出しラミネート法でも製造する事はできる。Although the coextrusion method, which provides good adhesive strength during lamination, is used as the method for producing the laminated sheet of the present invention, it can also be produced by dry lamination or extrusion lamination.
実施例１
下記の４種の成形材料をそれぞれ異なる押出機により溶
融させ共押出ダイスに導いて第１図の如きＡＢＣＢＡＤ
の順に重なった層状流を形成させた。Example 1 The following four types of molding materials were melted using different extruders and introduced into a coextrusion die to form ABCBAD as shown in Figure 1.
A laminar flow was formed in this order.
Ａ層、２３０℃に射るメルトフ口−インテ・ンクス０−
５ｇ／１０分のＰＰホモポリマー
８層、接着性樹脂として無水マレイン酸変性ＰＰＣ層、
エチレン−酢酸ビニル共重合体のケン化物り層、ＩＶ（
ｊ！１．０、水分率３０ｐｐｍのＰＥＴのホモポリマー
上記４種の溶融物より得られた積層シートの各層厚みは
、Ａ層３００μｍ、ＢＮ６０μｍ、、Ｃ層１２０ＩｍＳ
Ｄ層２０７１ｍ、計８００ｐｍであった。Layer A, melt opening projected at 230℃ - Inte nx 0 -
8 layers of 5g/10min PP homopolymer, maleic anhydride modified PPC layer as adhesive resin,
Saponified layer of ethylene-vinyl acetate copolymer, IV (
j! 1.0, a homopolymer of PET with a moisture content of 30 ppm. The thickness of each layer of the laminated sheet obtained from the above four melts is: A layer: 300 μm, BN: 60 μm, C layer: 120 ImS.
The D layer was 2071 m long and had a total thickness of 800 pm.
実施例２
実施例１のＤｉｌｌ構成樹脂を下記のものに変え同様の
シートを作成した。Example 2 A similar sheet was prepared by changing the Dill constituent resin of Example 1 to the following.
Ｄ層、実施例１のＤ層樹脂に２０％の熱可塑性共重合ポ
リエステル樹脂をブレンドした物実施例３
実施例ＩのＤ層構成樹脂を下記のものに変え同様のシー
トを作成した。D layer: D layer resin of Example 1 blended with 20% thermoplastic copolymerized polyester resin Example 3 A similar sheet was prepared by changing the D layer constituent resin of Example I to the following.
Ｄ層、実施例１のＤ層樹脂に２０％の熱可塑性ポリエス
テルエラストマーをブレンドした物比較例１
実施例１ＯＤ層構成樹脂を下記のものに変え同様のシー
トを作成した。D layer: D layer resin of Example 1 blended with 20% thermoplastic polyester elastomer Comparative Example 1 Example 1 A similar sheet was prepared by changing the OD layer constituent resin to the following.
比較例２
実施例１のＤ層構成樹脂を下記のものに変え同様のシー
トを作成した。Comparative Example 2 A similar sheet was prepared in Example 1 except that the resin constituting the D layer was changed to the one shown below.
Ｄ層、２００℃に於るメルトフローインデックス０．５
ｇ／１０分の直鎮状低密度ポリエチレン樹脂比較例３
実施例１のＤ層構成樹脂を下記のものに変え同様のシー
トを作成した。D layer, melt flow index 0.5 at 200℃
Comparative Example 3 of straight-shaped low-density polyethylene resin of g/10 min. A similar sheet was prepared by changing the resin constituting the D layer of Example 1 to the one shown below.
Ｄｌｉ、２００°Ｃに於るメルトフローインデックス０
．５ｇ／１０分の中密度ポリエチレン樹脂比較例４
実施例１のＤ層構成樹脂を下記のものに変え同様のシー
トを作成した。Dli, melt flow index 0 at 200°C
．． Comparative Example 4 of Medium Density Polyethylene Resin (5g/10min) A similar sheet was prepared by changing the resin constituting the D layer of Example 1 to the one shown below.
Ｄｉ、２１０°Ｃに於るメルトフローインデックス０．
５ｇ／ｌ、０分の高密度ポリエチレン樹脂比較例５
実施例１のＤＨ構成樹脂を下記のものに変え同様のシー
トを作成した。Di, melt flow index at 210°C 0.
5 g/l, 0 minute high-density polyethylene resin Comparative Example 5 A similar sheet was prepared by changing the DH constituent resin of Example 1 to the following.
Ｄｌｉ、２３０ ’Ｃに於るメルトフローインデックス
０．５ｇ／１０分のエチレン含有！２％のエチレン−プ
ロピレン共重合体
比較例６
実施例１のＤ層構成樹脂を下記のものに変え同様のシー
トを作成した。Dli, ethylene content with melt flow index 0.5g/10min at 230'C! Comparative Example 6 of 2% Ethylene-Propylene Copolymer A similar sheet was prepared by changing the resin constituting the D layer of Example 1 to the one shown below.
Ｄ層、実施ｇ４ＡＮ樹脂と同じ 試験の結果を下記に示す。D layer, same as g4AN resin The results of the test are shown below.
成形性は得られたシートをプラグ付間接加熱真空成形機
を用いて成形を行ない調べた。保香性は、実施例１〜３
、比較例１〜６を熱成形し各り層を特級の吸着率を一番
悪い値の物を１００％とし、相対比較した。The moldability was examined by molding the obtained sheet using an indirect heating vacuum molding machine equipped with a plug. Fragrance retention properties are shown in Examples 1 to 3.
, Comparative Examples 1 to 6 were thermoformed, and the adsorption rate of each special grade layer was set as 100%, and a relative comparison was made.
実験結果を表１に示す。The experimental results are shown in Table 1.
表１
い食品等においても風味、味覚、１員なう事なく使用出
来る様になった。Table 1 It has become possible to use this product in food products without sacrificing flavor or taste.
第１図は、実施例１の積層体の断面図を示す。 FIG. 1 shows a cross-sectional view of the laminate of Example 1.
Claims (1)
２層が接着性樹脂、第３層がエチレン−酢酸ビニル共重
合体のケン化物、第４層が接着性樹脂、第５層が第１層
と同様のプロピレンホモポリマー、最内側シール面に当
たる第６層がポリエチレンテレフタレート系樹脂からな
る保香性、易開封性、密封性良好な容器用多層シート。(1) The first layer on the outside of the container is a propylene homopolymer, the second layer is an adhesive resin, the third layer is a saponified product of ethylene-vinyl acetate copolymer, the fourth layer is an adhesive resin, and the fifth layer is a A multilayer sheet for containers with good fragrance retention, easy opening, and sealing properties, consisting of a propylene homopolymer like the first layer, and a polyethylene terephthalate resin in the sixth layer, which is the innermost sealing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2265789A JPH02204035A (en) | 1989-02-02 | 1989-02-02 | Multi-layered sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2265789A JPH02204035A (en) | 1989-02-02 | 1989-02-02 | Multi-layered sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02204035A true JPH02204035A (en) | 1990-08-14 |
Family
ID=12088915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2265789A Pending JPH02204035A (en) | 1989-02-02 | 1989-02-02 | Multi-layered sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02204035A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03244A (en) * | 1989-05-29 | 1991-01-07 | Dainippon Printing Co Ltd | food containers |
| JPH0452047U (en) * | 1990-09-07 | 1992-05-01 | ||
| JPH0496337U (en) * | 1991-01-29 | 1992-08-20 | ||
| JPH0531861A (en) * | 1991-07-26 | 1993-02-09 | Sumitomo Bakelite Co Ltd | Hermetically sealed container |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6068938A (en) * | 1983-09-26 | 1985-04-19 | 大日本印刷株式会社 | Multilayer synthetic resin containers or packaging |
| JPS63251236A (en) * | 1987-04-08 | 1988-10-18 | 住友ベークライト株式会社 | Multilayer sheet |
-
1989
- 1989-02-02 JP JP2265789A patent/JPH02204035A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6068938A (en) * | 1983-09-26 | 1985-04-19 | 大日本印刷株式会社 | Multilayer synthetic resin containers or packaging |
| JPS63251236A (en) * | 1987-04-08 | 1988-10-18 | 住友ベークライト株式会社 | Multilayer sheet |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03244A (en) * | 1989-05-29 | 1991-01-07 | Dainippon Printing Co Ltd | food containers |
| JPH0452047U (en) * | 1990-09-07 | 1992-05-01 | ||
| JPH0496337U (en) * | 1991-01-29 | 1992-08-20 | ||
| JPH0531861A (en) * | 1991-07-26 | 1993-02-09 | Sumitomo Bakelite Co Ltd | Hermetically sealed container |
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