JPS601229B2 - Easy-open sealed container - Google Patents
Easy-open sealed containerInfo
- Publication number
- JPS601229B2 JPS601229B2 JP14743980A JP14743980A JPS601229B2 JP S601229 B2 JPS601229 B2 JP S601229B2 JP 14743980 A JP14743980 A JP 14743980A JP 14743980 A JP14743980 A JP 14743980A JP S601229 B2 JPS601229 B2 JP S601229B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- resin film
- film
- weight
- ethylene
- 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
Links
- 229920005989 resin Polymers 0.000 claims description 135
- 239000011347 resin Substances 0.000 claims description 135
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 74
- 239000002131 composite material Substances 0.000 claims description 30
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 21
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 19
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 12
- 229920005672 polyolefin resin Polymers 0.000 claims description 12
- 229920003002 synthetic resin Polymers 0.000 claims description 9
- 239000000057 synthetic resin Substances 0.000 claims description 9
- 229920005604 random copolymer Polymers 0.000 claims description 8
- 229920001225 polyester resin Polymers 0.000 claims description 5
- 239000004645 polyester resin Substances 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 4
- 229920006122 polyamide resin Polymers 0.000 claims description 3
- 150000001336 alkenes Chemical class 0.000 claims 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims 1
- 238000009835 boiling Methods 0.000 description 9
- 239000004743 Polypropylene Substances 0.000 description 7
- -1 polypropylene Polymers 0.000 description 7
- 229920001155 polypropylene Polymers 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 229920006026 co-polymeric resin Polymers 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 3
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 235000013527 bean curd Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 235000013601 eggs Nutrition 0.000 description 2
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 241000219112 Cucumis Species 0.000 description 1
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000000003 hoof Anatomy 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 235000013322 soy milk Nutrition 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】
本発明は、容器本体と蓋村とが熱シールされてなる合成
樹脂製易開封性密封容器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an easily openable sealed container made of synthetic resin, in which a container body and a lid are heat-sealed.
このような密封容器は、たとえば卵や豆腐などの食品包
装用の蓋付容器として市場で広く使用されている。とこ
ろが、従来の食品包装用の蓋付用器には、容器本体と蓋
材とに同種の樹脂を用いる場合と、異種の樹脂を用いる
場合とがある。前者の場合は、熱可塑性樹脂からなるフ
ィルムやシートをそのまま、または複合したものを使用
して容器本体を成形し、これに同種樹脂のフィルムを熱
シールしたものが用いられる。Such sealed containers are widely used in the market as containers with lids for packaging foods such as eggs and tofu. However, in conventional containers with lids for food packaging, there are cases where the same type of resin is used for the container body and the lid material, and cases where different types of resins are used. In the former case, the container body is formed using a thermoplastic resin film or sheet as it is or a composite thereof, and a film or sheet of the same type of resin is heat-sealed to this.
この容器は密封陣が良いが、シールが完全であるため、
これを開封するために、刃物を用いる必要があり不便で
ある。また、後者の場合は、容器本体と蓋材間を接着剤
を用いて接着して密封するが、これは開封性にはすぐれ
ているが、密封性に欠けるという問題がある。This container has a good seal, but since the seal is perfect,
In order to open this, it is necessary to use a knife, which is inconvenient. In the latter case, the container body and the lid are bonded and sealed using an adhesive, but although this has excellent unsealability, there is a problem in that it lacks sealing performance.
さらに、これら従来の密封容器では、熱いシールの不足
、接着剤の劣化、密封後の煮沸、あるいは煮沸直後の急
速冷凍により、蓋材の一部が容器より剥離を生じ長期保
存に耐えることができない欠点があった。Furthermore, in these conventional sealed containers, part of the lid material may peel off from the container due to insufficient hot sealing, deterioration of the adhesive, boiling after sealing, or rapid freezing immediately after boiling, making it impossible to withstand long-term storage. There were drawbacks.
本発明は、これらの問題を解決したものであり、容器と
蓋材とを熱シールして完全密着させ、しかる後、蓋材を
開封する際、シール面が剥離せず、容器本体を構成する
複合シート中の混合樹脂フィルム層が内層破壊して２分
割剥離し開封できるもので、通常の煮沸、煮沸直後の急
速冷凍による柔順鰍ミなく、しかも熱シール面の劣化が
ないため密封容器の長期保存にも耐えることができる合
成樹脂製易開封性密封容器を提供するものである。The present invention solves these problems by heat-sealing the container and the lid to make them completely adhere to each other, and then, when the lid is unsealed, the sealing surface does not peel off, forming the container body. The mixed resin film layer in the composite sheet can be opened by breaking the inner layer and peeling it into two parts, so there is no softness due to normal boiling or quick freezing immediately after boiling, and there is no deterioration of the heat-sealed surface, so the sealed container can be used for a long time. To provide an easily openable sealed container made of synthetic resin that can withstand storage.
すなわち、本発明は、複合シートからなる容器本体に、
蓋村として合成樹脂フィルムを熱シールしてなる密封容
器であって、その容器本体は、スチレン系樹脂シートと
酢酸ビニル含有量５〜２５重量％のエチレン−酢酸ビニ
ル共重合樹脂３〜５０重量％、エチレン−１−ブテンラ
ンダム共重合樹脂１０〜５０重量％、オレフィン系樹脂
０〜３の重量％およびスチレン系樹脂８０〜２の重量％
の割合で含有した混合樹脂フィルムとを穣層した複合シ
ートからなり、しかも、その容器本体の熱シール面が前
記混合樹脂フィルムとなるように成形したものであり、
その蓋村はオレフィン系樹脂フィルムもしくはエチレン
−酢酸ビニル共重合樹脂フィルム単独トまたはこれらと
ポリエステル樹脂フィルムもしくはポリアミド樹脂フィ
ルムとを槍層した複合フィルムからなり「 しかも「そ
の蓋材の熱シール面がオレフィン系樹脂またはエチレン
−酢酸ビニル共重合成樹脂のフィルムであるように構成
してなることを特徴とする。That is, the present invention provides a container body made of a composite sheet,
It is a sealed container made by heat-sealing a synthetic resin film as a cover, and the container body is made of a styrene resin sheet and an ethylene-vinyl acetate copolymer resin with a vinyl acetate content of 5 to 25% by weight and 3 to 50% by weight. , 10-50% by weight of ethylene-1-butene random copolymer resin, 0-3% by weight of olefin resin, and 80-2% by weight of styrene resin.
It is made of a composite sheet layered with a mixed resin film containing a proportion of
The lid is made of an olefin resin film or an ethylene-vinyl acetate copolymer resin film alone, or a composite film consisting of a layer of these and a polyester resin film or a polyamide resin film. It is characterized by being constructed as a film of a polyurethane resin or an ethylene-vinyl acetate copolymer resin.
以下「本発明をさらに詳しく発明する。Hereinafter, the present invention will be described in further detail.
本発明の容器本体をつくる複合シートの基材であるスチ
レン系樹脂シートは、代表的には一般用スチレン樹脂「
耐衝撃用スチレン樹脂またはこれらの混合した樹脂から
なり「 その肉厚は１００〜１０００仏、好ましくは２
００〜８００仏である。The styrene resin sheet that is the base material of the composite sheet that makes up the container body of the present invention is typically a general-use styrene resin.
It is made of impact-resistant styrene resin or a mixture of these resins and has a wall thickness of 100 to 1000 mm, preferably 2 mm.
00 to 800 Buddha.
肉厚が１００〃未満では、容器が損傷しやすくかつ腰が
弱い。１０００〆を超えるとコスト高となる。When the wall thickness is less than 100 mm, the container is easily damaged and has a weak stiffness. If it exceeds 1000, the cost will be high.
また「本発明の熱シール面に用いる混合樹脂フィルムの
主成分であるスチレソ系樹脂は、代表的には一般用スチ
レン樹脂、耐衝撃用樹脂またはこれらの混合した樹脂で
ある。混合樹脂フィルム中のスチレン系樹脂の割合は、
８０〜２０重量％であって、好ましくは「 ５５〜３堰
重量％である。スチレン系樹脂の割合が８０％を超える
と、蓋材であるオレフィン系樹脂またはエチレン−酢酸
ビニル共重合樹脂フィルムとの熱シールが充分でなくも
２の重量％未満では「 スチレン系樹脂ソートとの密着
強度が弱く、開封時、スチレン系樹脂シートと混合樹脂
フィルム積層界面より剥離を生じる。混合樹脂フィルム
に用いるエチレン−酢酸ビニル共重合樹脂は、酢酸ビニ
ルの含有量が５〜２５重量％のものを用いる。Furthermore, ``The styrene resin, which is the main component of the mixed resin film used for the heat-sealing surface of the present invention, is typically a general-use styrene resin, an impact-resistant resin, or a mixture of these resins. The proportion of styrene resin is
It is 80 to 20% by weight, preferably 55 to 3% by weight. If the proportion of styrene resin exceeds 80%, it will not be compatible with the olefin resin or ethylene-vinyl acetate copolymer resin film that is the lid material. Even if the heat sealing is not sufficient, if it is less than 2% by weight, the adhesion strength with the styrene resin sort is weak, and when the package is opened, the styrene resin sheet and mixed resin film will peel from the laminated interface.The ethylene used in the mixed resin film - The vinyl acetate copolymer resin used has a vinyl acetate content of 5 to 25% by weight.
混合樹脂フィルム中のエチレン−酢酸ビニル共重合樹脂
の割合は３〜５の重量％、好ましくは、１０〜３の雲量
％である。３重量％未満であると、スチレン系樹脂シー
トとの密着強度か弱く、５の重量％を超えると「複合シ
ートを押出すとき、混合樹脂フィルムの粘着が激しく、
冷却ロールに付着し成形不良となる。The proportion of ethylene-vinyl acetate copolymer resin in the mixed resin film is between 3 and 5% by weight, preferably between 10 and 3% by weight. If it is less than 3% by weight, the adhesion strength with the styrene resin sheet will be weak, and if it exceeds 5% by weight, the adhesion of the mixed resin film will be severe when extruding the composite sheet.
It adheres to the cooling roll and causes molding defects.
混合樹脂フィルムに用いるエチレン−１−ブテンランダ
ム共重合樹脂の混合樹脂フィルム中の割合は、１０〜５
の重量％、好ましくは、２０〜４広重合％である。The ratio of the ethylene-1-butene random copolymer resin used in the mixed resin film is 10 to 5.
% by weight, preferably from 20 to 4% by weight.
１の重量％未満であると、蓋材との熱シールの強度が弱
く、５の重量％を超えると、易開封性を阻害する。If it is less than 1% by weight, the strength of heat sealing with the lid material will be weak, and if it exceeds 5% by weight, easy opening will be inhibited.
混合樹脂フィルムに用いるオレフィン系樹脂は「代表的
には、プロピレン樹脂、低密度ポリエチレン樹脂、また
はエチレンープロピレン共重合樹脂でありト混合樹脂フ
ィルム中のオレフィン系樹脂の割合は、０〜３の重量％
、好ましくは「 ０〜２の重量％である。The olefin resin used in the mixed resin film is typically propylene resin, low density polyethylene resin, or ethylene-propylene copolymer resin, and the proportion of the olefin resin in the mixed resin film is 0 to 3 by weight. %
, preferably 0 to 2% by weight.
３の重量％を超えると「 スチレン系樹脂シートとの密
着強度が弱く「開封時スチレン系樹脂シートと混合樹脂
フィルムとの積層界面よりの剥離を生じる。If the amount exceeds 3% by weight, the adhesion strength with the styrene resin sheet will be weak, resulting in peeling from the laminated interface between the styrene resin sheet and the mixed resin film when the package is opened.
なお、オレフィン系樹脂を含む場合、好ましくは５〜３
０重量％では〜熱板成形性が特に良好である。混合樹脂
フィルムが上記した如き配合割合であるとき、浪合樹脂
フィルムの剥離強度（蓋村を容器本体から１８００折り
曲げて開封したとき「混合樹脂フィルムの内層が材料破
壊されるときの強度をさす。In addition, when containing an olefin resin, preferably 5 to 3
At 0% by weight, the hot plate formability is particularly good. When the mixed resin film has the above-mentioned compounding ratio, the peel strength of the Namiai resin film (refers to the strength at which the inner layer of the mixed resin film breaks down when the cover is bent 1800 degrees from the container body and opened).
）が０．５〜２．０ｋｇ／２伍肋程度となるので熱シー
ル面の接着がはがれず「混合樹脂フィルムの内層が材料
破壊されて容易に人力により開封することができる。こ
の混合樹脂フィルムの肉厚は３〜３０〆「好ましくは、
７〜２０仏である。) is about 0.5 to 2.0 kg/2 cubic meters, so the adhesive on the heat-sealed surface does not come off, and the inner layer of the mixed resin film is destroyed and can be easily opened manually. The thickness of the film is preferably 3 to 30 mm.
There are 7 to 20 Buddhas.
肉厚が３仏未満では、押出時に均一なフィルムが得られ
ず、また混合樹脂フィルムとしての層内剥離が困難とな
り、また夕３０仏を超えるとコスト高となる。本発明に
用いる蓋材としては「オレフィン系樹脂フィルムを単独
で用いる場合ｔエチレン−酢酸ビニル共重合樹脂フィル
ムを単独で用いる場合、または、オレフィン系樹脂フィ
ルムもしくはェチ０レン−酢酸ビニル共重合樹脂フィル
ムのいずれか一種と、ポリエステル樹脂フィルムもしく
はナイロン樹脂フィルムのいずれか一種とを、積層した
複合フィルムを用いる場合がある。If the wall thickness is less than 3 mm, a uniform film cannot be obtained during extrusion, and interlayer peeling as a mixed resin film will be difficult, and if it exceeds 30 mm, the cost will be high. As the lid material used in the present invention, ``When an olefin resin film is used alone, t When an ethylene-vinyl acetate copolymer resin film is used alone, or an olefin resin film or an ethylene-vinyl acetate copolymer resin A composite film may be used in which one type of film and one type of polyester resin film or nylon resin film are laminated.
蓋材に用いるオレフイン系樹脂は「代表的にはもブロピ
レン樹脂、エチレン樹脂、またはエチレンープロピレン
共重合樹脂であり〜エチレン−酢酸ビニル共重合樹脂と
しては、酢酸ビニル含有量が２〜１５重量％のものが好
ましい。オレフィン系樹脂フィルム、または、エチレン
−酢酸ビニル共重合樹脂フィルムの肉厚は１０〜５０仏
、好ましくは２０〜４０仏である。内厚が１０〆未満で
は、強度が弱く「５０仏以上ではコスト高となる。また
、ポリエステル樹脂または、ナイロン樹脂の肉厚は１０
〜２５仏が好ましい。本発明の容器本体に用いる複合シ
ートの積層方法は、押出機を用いて、ダィで一対となる
共押出方法が好ましいが「その他の方法、たとえば「ス
チレン系樹脂シートまたは混合樹脂フィルムのいずれか
を、混合樹脂フィルムの剥離強度より強い接着力を持つ
接着剤と共に押出機で押出し、これと他方の樹脂シート
または樹脂フィルムとを貼り合わせて圧着積層する方法
、または、樹脂シートまたは樹脂フィルムを押出機で押
出し、これと接着剤を塗布した他方の樹脂シートまたは
樹脂フィルムとを圧着積層する方法を用いることもでき
る。The olefin resin used for the lid material is typically bropylene resin, ethylene resin, or ethylene-propylene copolymer resin, and the ethylene-vinyl acetate copolymer resin has a vinyl acetate content of 2 to 15% by weight. The thickness of the olefin resin film or the ethylene-vinyl acetate copolymer resin film is 10 to 50 mm, preferably 20 to 40 mm. If the inner thickness is less than 10 mm, the strength is weak. If it is more than 50 French, the cost will be high.Also, the wall thickness of polyester resin or nylon resin is 10 French or more.
~25 Buddhas are preferred. The method of laminating the composite sheet used for the container body of the present invention is preferably a co-extrusion method in which a pair of composite sheets are laminated using an extruder and a die, but other methods are also possible, such as "styrene resin sheet or mixed resin film". is extruded using an extruder together with an adhesive that has an adhesive strength stronger than the peel strength of the mixed resin film, and this is then laminated with the other resin sheet or resin film by pressure bonding, or the resin sheet or resin film is extruded. It is also possible to use a method in which the resin sheet is extruded using a machine and the other resin sheet or resin film coated with an adhesive is laminated under pressure.
蓋材の複合フィルムも同様の方法で積層することができ
る。なお混合樹脂フィルムを押出機で共押出しする前、
あらかじめ成分樹脂を一般のミキシングロールトバンバ
リミキサー、予蹄押出機等で均質に泥練しておくことが
望ましい。容器本体は、通常の庄空成形機または真空成
形機を用いて所望の形状に成形することができる。A composite film for the lid material can also be laminated in a similar manner. Before coextruding the mixed resin film with an extruder,
It is desirable to homogeneously knead the component resins in advance using a general mixing roll mixer, a hoof extruder, etc. The container body can be molded into a desired shape using a normal Shoku-forming machine or vacuum-forming machine.
以上詳述した如く本発明はスチレン系樹脂シートと混合
樹脂フィルムとからなる複合シートを成形して得られる
容器本体と、オレフィン系樹脂フィルム、エチレン−酢
酸ビニル共重合樹脂フィルム「 またはこれらとポリエ
ステル樹脂フィルムもしくはポリアミド樹脂フィルムと
の複合フィルムからなる蓋材とを熱シールして得られる
密閉容器であり、シールが完全であり劣化もなく、また
蓋材開封の際は混合樹脂フィルム層より剥離する易開封
性であり通常の煮沸または煮沸後直ちに急速冷凍時の剥
離がなく長期保存に耐えることができるすぐれた合成樹
脂製易開封性密封容器である。以下実施例により本発明
をさらに詳細に説明する。実施例 １
シート用樹脂として、耐衝撃用スチレン樹脂を用い、こ
れと、フィルム用樹脂として、酢酸ビニル含有量１の重
量％のエチレン−酢酸ビニル共重合樹脂２５重量％、エ
チレン一１−ブテンランダム共重合樹脂３５重量％、プ
ロピレン樹脂５重量％、および耐衝撃用スチレン樹脂３
５重量％からなる混合樹脂とを、それぞれ２台の押出機
を用いて共押出し、肉厚３５０仏の耐衝撃用スチレン樹
脂シートと肉厚１０仏の混合樹脂フィルムとを熱轍着さ
せて複合シートを得た。As detailed above, the present invention relates to a container body obtained by molding a composite sheet consisting of a styrene resin sheet and a mixed resin film, an olefin resin film, an ethylene-vinyl acetate copolymer resin film, or a polyester resin film. It is an airtight container obtained by heat-sealing a film or a lid material made of a composite film with a polyamide resin film.The seal is perfect and does not deteriorate, and the lid material is easily peeled off from the mixed resin film layer when the lid material is opened. This is an excellent, easy-to-open sealed container made of synthetic resin that is easy to open and can withstand long-term storage without peeling during normal boiling or rapid freezing immediately after boiling.The present invention will be explained in more detail with reference to Examples below. Example 1 An impact-resistant styrene resin was used as the resin for the sheet, and 25% by weight of an ethylene-vinyl acetate copolymer resin with a vinyl acetate content of 1% by weight and ethylene-1-butene were used as the resins for the film. Random copolymer resin 35% by weight, propylene resin 5% by weight, and impact resistant styrene resin 3
A mixed resin consisting of 5% by weight was co-extruded using two extruders, and a shock-resistant styrene resin sheet with a thickness of 350 mm and a mixed resin film with a thickness of 10 mm were thermally rutted to form a composite. Got a sheet.
この複合シートを熟成形して容器本体を得た。２軸延伸
ポリプロピレンフィルムと無延伸ポリプロピレンフィル
ムとを貼り合わせたフィルムを蓋材とし、無延伸プロピ
レンフィルムが容器本体のシール面にくるようにかごね
、１６０００，ｌｓｅｃ、１．５ｋｇ′ｃそで封繊した
。This composite sheet was aged to obtain a container body. A film made by laminating a biaxially stretched polypropylene film and an unstretched polypropylene film was used as the lid material, and the container was sealed with a 16,000, lsec, 1.5 kg'c sleeve so that the unstretched propylene film was on the sealing surface of the container body. It was thin.
得られた容器を試験したところ、８５００、４０分の煮
沸テストで水分の浸透はなく、剥離強度は１．０ｋ９′
２０肋であり、また易開封性にすぐれていた。実施例
２
シート用樹脂として、耐衝撃用スチレン樹脂を用いた。When the resulting container was tested, no moisture penetrated in a 40-minute boiling test at 8500, and the peel strength was 1.0k9'.
It had 20 ribs and was easy to open. Example
2. Impact-resistant styrene resin was used as the resin for the sheet.
これと、フィルム用樹脂として、酢酸ビニル含有量１０
重量％のエチレン−酢酸ビニル共重合樹脂３の重量％、
エチレン−１−ブテンランダム共重合樹脂３の重量％、
および耐衝撃用スチレン樹脂４の重量％からなる混合樹
脂とを、それぞれ２台の押出機を用いて共押出し、肉厚
４００仏の耐衝撃用スチレン樹脂シートと肉厚７仏の混
合樹脂フィルムとを熱融着させて複合シートを作成した
。この複合シートを熟成形して容器本体をつくり「 こ
れに蓋材として、２車由延伸ポリプロピレンフィルムと
無延伸ポリプロピレンフィルムとを貼り合わせたものを
用い、無延伸ポリプロピレンフィルムが容器本体のシー
ル面にくるようにかさね、１６０℃，ｌｓｅｃ、１．５
ｋ９／めで封級した。得られた容器を試験したところ「
８５００、４０分の煮沸で水分の浸透はなく、かつ剥
離強度は１．２ｋ９／２０柳であり、また易開封性にす
ぐれていた。実施例 ３
シート用樹脂として、耐衝撃用スチレン樹脂５０重量部
と一般用スチレン樹脂５の重量部の混合したスチレン系
樹脂を用いた。In addition to this, as a film resin, the vinyl acetate content is 10
% by weight of ethylene-vinyl acetate copolymer resin 3;
Weight % of ethylene-1-butene random copolymer resin 3,
and a mixed resin consisting of 4% by weight of impact-resistant styrene resin were co-extruded using two extruders, respectively, and an impact-resistant styrene resin sheet with a wall thickness of 400 mm and a mixed resin film with a wall thickness of 7 mm were coextruded using two extruders. A composite sheet was created by heat-sealing the two. This composite sheet is matured to form a container body, and as a lid material, a stretched polypropylene film from two wheels and an unstretched polypropylene film are laminated together, and the unstretched polypropylene film is attached to the sealing surface of the container body. Wrap it up, 160℃, lsec, 1.5
It was graded k9/me. When the resulting container was tested,
There was no penetration of moisture after boiling for 40 minutes at 8,500°C, and the peel strength was 1.2K9/20 Yanagi, and it was easy to open. Example 3 A styrene resin containing 50 parts by weight of an impact-resistant styrene resin and 5 parts by weight of a general-purpose styrene resin was used as a sheet resin.
これと、フィルム用樹脂として、酢酸ビニル含有量１の
重量％のエチレン−酢酸ビニル共重合樹脂２５重量％、
エチレン−１−ブテンランダム共重合樹脂２５重量％、
耐衝撃用スチレン樹脂５の重量部と一般用スチレン樹脂
５０重量部の混合した樹脂５の重量％からなる混合樹脂
とを、それぞれ２台の押出機で共押出し、肉厚３００仏
のスチレン系樹脂シートと肉厚２０仏の混合樹脂フィル
ムとを熱敷着して複合シートを得た。この複合シートを
熟成形して容器本体をつくり、蓋村として２車由延伸ポ
リプロピレンフィルムと無延伸ポリプロピレンフィルム
とを貼り合わせたものを用い、後者がシール面にくるよ
うに重ね、２００℃，ｌｓｅｃ、１．０ｋｇ′めで封級
した。得られた容器を試験したところ、８５００、４び
分の煮沸で水分の浸透はなく、かつ剥離強度は１．８ｋ
ｇ′２仇肋であり、また易開封性にすぐれていた。実施
例 ４
シート用樹脂として、耐衝撃用スチレン樹脂と一般用ス
チレン樹脂の重量部で５０：５０の混合物に、酸化チタ
ンを２重量％添加したものを用いた。In addition, as a film resin, 25% by weight of an ethylene-vinyl acetate copolymer resin with a vinyl acetate content of 1% by weight,
25% by weight of ethylene-1-butene random copolymer resin,
A mixed resin consisting of 5 parts by weight of impact-resistant styrene resin 5 and 50 parts by weight of general-use styrene resin was coextruded using two extruders, respectively, to produce a styrene resin with a wall thickness of 300 mm. A composite sheet was obtained by thermally bonding the sheet and a mixed resin film with a thickness of 20 mm. This composite sheet was matured to make a container body, and the lid was made by laminating two stretched polypropylene films and an unstretched polypropylene film, stacked so that the latter was on the sealing surface, and heated at 200°C for lsec. , and sealed at 1.0 kg'. When the resulting container was tested, no moisture penetrated after boiling for 8,500,4 minutes, and the peel strength was 1.8K.
g'2, and also had excellent ease of opening. Example 4 As a sheet resin, a mixture of impact-resistant styrene resin and general-use styrene resin in a ratio of 50:50 by weight, with 2% by weight of titanium oxide added thereto was used.
これと、フィルム用樹脂として、酢酸ビニル含有量が９
重量％であるエチレン−酢酸ビニル共重合樹脂３の重量
％、エチレン−１−ブテンランダム共重合樹脂３の重量
％、および一般用スチレン樹脂４の重量％からなる混合
樹脂とを、それぞれ２台の押出機で共押出し、肉厚３８
０ｒのスチレン系樹脂シートと肉厚２０仏の混合樹脂フ
ィルムとの熱融着させた複合シートを得た。この複合シ
ートを熟成形して豆腐容器をつくり、これに豆乳と凝固
剤を固形分で１の重量％含むように調合した水溶液をオ
ーバーフローする状態に満たした。蓋材には、酢酸ビニ
ル含有量が２重量％のエチレン−酢酸ビニル共重合樹脂
フィルム４０〃と２軸延伸ポリエステルフィルム１２仏
とを積層した複合フィルムを用いた。シール面にエチレ
ン−酢酸ビニル共重合樹脂フィルムがくるように、蓋材
で容器本体を被履し、１８０００，ｉ．５ｋ９′ｃ椎，
０．＄ｅｃで熱シールした。得られた容器を市販の類似
用途の密封容器（比較例１）と共に、９０００の熱水中
で５瓜ｈｍ煮沸した。結果を第１表に示した。第１表
実施例 ５
シート用樹脂として耐衝撃用スチレン樹脂を用いた。In addition to this, as a film resin, the vinyl acetate content is 9.
A mixed resin consisting of 3% by weight of ethylene-vinyl acetate copolymer resin, 3% by weight of ethylene-1-butene random copolymer resin, and 4% by weight of general-use styrene resin was prepared in two units each. Co-extruded with an extruder, wall thickness 38
A composite sheet was obtained by heat-sealing a 0R styrene resin sheet and a 20 mm thick mixed resin film. This composite sheet was aged to make a tofu container, and the container was filled to an overflow state with an aqueous solution containing soy milk and a coagulant at a solid content of 1% by weight. A composite film in which 40 ethylene-vinyl acetate copolymer resin films having a vinyl acetate content of 2% by weight and 12 biaxially stretched polyester films were laminated was used as the lid material. The container body was covered with a lid material so that the ethylene-vinyl acetate copolymer resin film was on the sealing surface, and 18,000, i. 5k9'c vertebrae,
0. Heat sealed with $ec. The obtained container was boiled for 5 melons in 9,000 ml of hot water together with a commercially available sealed container for similar use (Comparative Example 1). The results are shown in Table 1. Table 1 Example 5 An impact-resistant styrene resin was used as the resin for the sheet.
これと、フィルム用樹脂として、酢酸ビニル含有量が１
６％であるエチレン−酢酸ビニル共重合樹脂３０重量％
、エチレン−１−ブテンランダム共重合樹脂３０重量％
、および一般用スチレン樹脂４の重量％からなる混合樹
脂とを、それぞれ２台の押出機で共押出し、肉厚５００
払のスチレン系樹脂シートと肉厚２０仏の混合樹脂フィ
ルムとを熱融着させて複合シートを得た。この複合シー
トを熱成形してカップを成形し、これに生卵と水との割
合が重量比で１対３である混合溶液をを満たし、この上
に蓋村として、シール面に酢酸ビニル含有量が６重量％
のエチレン−酢酸ビニル共重合樹脂がくるように、肉厚
２０仏のこの共重合樹脂フィルムと肉厚１５仏の２軸延
伸ナイロン樹脂フィルム債層した複合フィルムを被履し
、１８００○、３ｋｇ／ｃめ、ｌｓｅｃで熱シールした
。この容器と市販の類似用途の密封容器（比較例２）を
用い、これら密封容器を９０℃の熱水中で５印ｈｊｎ煮
沸し、この後直ちに急速冷凍し「 さらに２４時間放置
し性能を調べた。結果を第２表に示した。第２表In addition to this, as a film resin, the vinyl acetate content is 1
6% ethylene-vinyl acetate copolymer resin 30% by weight
, 30% by weight of ethylene-1-butene random copolymer resin
, and a mixed resin consisting of 4% by weight of general-purpose styrene resin were coextruded using two extruders, respectively, to obtain a wall thickness of 500 mm.
A composite sheet was obtained by heat-sealing the styrene-based resin sheet and a mixed resin film with a thickness of 20 mm. This composite sheet is thermoformed to form a cup, which is filled with a mixed solution of raw egg and water in a weight ratio of 1:3, and a lid is placed on top of the cup, and the sealing surface contains vinyl acetate. The amount is 6% by weight
A composite film made of this copolymer resin film with a wall thickness of 20 cm and a biaxially stretched nylon resin film with a wall thickness of 15 cm was layered so that the ethylene-vinyl acetate copolymer resin was layered, and the weight was 1800○, 3 kg/ Heat sealed at lsec. Using this container and a commercially available sealed container for a similar purpose (Comparative Example 2), these sealed containers were boiled in hot water at 90°C for 5 hours, then quickly frozen, and then left for another 24 hours to examine performance. The results are shown in Table 2.Table 2
Claims (1)
ルムでつくられた蓋材とからなり蓋材を容器本体に熱シ
ールしてなる易開封性密封容器であって、容器本体を構
成する複合シートは、スチレン系樹脂シートと混合樹脂
フイルムとを積層してつくられ、混合樹脂フイルムは、
酢酸ビニル含有量５〜２５重量％のエチレン−酢酸ビニ
ル共重合樹脂３〜５０重量％、エチレン−１−ブテンラ
ンダム共重合成樹脂１０〜５０重量％、オレフイン系樹
脂０〜３０重量％、およびスチレン系樹脂８０〜２０重
量％の割合で含有した混合樹脂のフイルムであり、蓋材
を構成する合成樹脂フイルムは、オレフイン系樹脂フイ
ルム、またはエチレン−酢酸ビニル共重合樹脂フイルム
、またはこれらとポリエステル樹脂フイルムもしくはポ
リアミド樹脂フイルムとを積層した複合フイルムであり
、さらに容器本体と蓋材との熱シール面が、容器本体を
構成する複合シート中の混合樹脂フイルムと蓋材を構成
する合成樹脂フイルム中のオレフイン系樹脂フイルムま
たはエチレン−酢酸ビニル共重合樹脂フイルムとである
ように構成してなる合成樹脂製易開封性密封容器。1. An easy-to-open sealed container consisting of a container body made of a composite sheet and a lid material made of synthetic resin film, the lid material being heat-sealed to the container body, the composite sheet forming the container body. is made by laminating a styrene resin sheet and a mixed resin film, and the mixed resin film is
Ethylene-vinyl acetate copolymer resin 3-50% by weight with a vinyl acetate content of 5-25%, ethylene-1-butene random copolymer synthetic resin 10-50% by weight, olefinic resin 0-30% by weight, and styrene. It is a mixed resin film containing 80 to 20% by weight of a resin-based resin, and the synthetic resin film constituting the lid material is an olefin resin film, an ethylene-vinyl acetate copolymer resin film, or a combination of these and a polyester resin film. Alternatively, it is a composite film in which a polyamide resin film is laminated, and the heat sealing surface between the container body and the lid material is a composite film made of a mixed resin film in the composite sheet constituting the container body and an olefin in the synthetic resin film constituting the lid material. 1. An easily openable sealed container made of synthetic resin, comprising a resin film or an ethylene-vinyl acetate copolymer resin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14743980A JPS601229B2 (en) | 1980-10-21 | 1980-10-21 | Easy-open sealed container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14743980A JPS601229B2 (en) | 1980-10-21 | 1980-10-21 | Easy-open sealed container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5777464A JPS5777464A (en) | 1982-05-14 |
| JPS601229B2 true JPS601229B2 (en) | 1985-01-12 |
Family
ID=15430356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14743980A Expired JPS601229B2 (en) | 1980-10-21 | 1980-10-21 | Easy-open sealed container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS601229B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0796283B2 (en) * | 1986-10-01 | 1995-10-18 | 東レ株式会社 | Easy-cleavable laminated film |
-
1980
- 1980-10-21 JP JP14743980A patent/JPS601229B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5777464A (en) | 1982-05-14 |
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