JPS6387222A - Film or sheet with easily tearing property - Google Patents
Film or sheet with easily tearing propertyInfo
- Publication number
- JPS6387222A JPS6387222A JP61231335A JP23133586A JPS6387222A JP S6387222 A JPS6387222 A JP S6387222A JP 61231335 A JP61231335 A JP 61231335A JP 23133586 A JP23133586 A JP 23133586A JP S6387222 A JPS6387222 A JP S6387222A
- Authority
- JP
- Japan
- Prior art keywords
- film
- sheet
- resin
- polyester resin
- crystallinity
- 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
- 229920001225 polyester resin Polymers 0.000 claims abstract description 21
- 239000004645 polyester resin Substances 0.000 claims abstract description 21
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 12
- 239000000057 synthetic resin Substances 0.000 claims abstract description 12
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000011342 resin composition Substances 0.000 claims abstract 2
- 238000002156 mixing Methods 0.000 claims description 8
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 4
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 6
- 229920000515 polycarbonate Polymers 0.000 abstract description 4
- 239000004417 polycarbonate Substances 0.000 abstract description 4
- 229920000728 polyester Polymers 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 abstract description 2
- 238000001125 extrusion Methods 0.000 abstract description 2
- 238000012856 packing Methods 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
- -1 polyethylene Polymers 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 229920000098 polyolefin Polymers 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920006289 polycarbonate film Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-N benzene-dicarboxylic acid Natural products OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000021438 curry Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 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）
本発明は易開封性を有するフィルムまたはシートに関し
、特に、ポリカーボネート、ポリエステル等の合成樹脂
からなる容器の蓋材もしくは容器本体として有用な易開
封性を有するフィルムまたはシートに関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to an easily openable film or sheet, particularly an easy openable film or sheet useful as a lid material or a container body made of synthetic resin such as polycarbonate or polyester. The present invention relates to a film or sheet that has properties.
（従来の技術および解決すべき問題点）従来、ポリカー
ボネート、ポリエステル等の合成樹脂を容器本体とし、
この開口部を易開封性を有する蓋材として、ポリエチレ
ン系合成樹脂合成樹脂に熱接着剤を混合したフィルムま
たはシートを用いて封緘熱接着した容器は、例えば、水
草かん、カレー等の容器として使用されているが、この
容器本体と蓋材との熱接着強度は不安定であって、成る
場合には熱接着強度が強すぎて開封が容易でなく、また
、成る場合には熱接着強度か弱すぎて蓋材が剥離してし
まうという欠点があった。(Conventional technology and problems to be solved) Conventionally, the main body of the container was made of synthetic resin such as polycarbonate or polyester.
A container whose opening is thermally sealed using a film or sheet made of polyethylene synthetic resin mixed with a thermal adhesive as an easy-to-open lid material can be used, for example, as a container for aquatic plants, curry, etc. However, the thermal adhesive strength between the container body and the lid material is unstable; The drawback was that it was too weak and the lid material would peel off.
本発明者らはこのような欠点を解決すべく種々検討した
結果、結晶化度の低いポリエステル樹脂に適当量のポリ
オレフィン系合成樹脂を配合した組成物より成形したフ
ィルムまたはシートが蓋材もしくは容器本体として極め
て適していることを見出し本発明を完成したもので、本
発明の目的はポリカーボネート、ポリエステル等の合成
樹脂からなる容器の蓋材もしくは容器本体として有用な
易開封性を有するフィルムまたはシートを提供するにあ
る。As a result of various studies to solve these drawbacks, the present inventors found that a film or sheet formed from a composition containing a polyester resin with low crystallinity and an appropriate amount of polyolefin synthetic resin can be used as a lid material or a container body. The object of the present invention is to provide an easily openable film or sheet useful as a container lid or container body made of synthetic resin such as polycarbonate or polyester. There is something to do.
（問題点の解決手段）
すなわち、本発明は結晶化度４０％以下好ましくは２５
％以下のポリエステル樹脂１００部に対してポリオレフ
ィン系樹脂１〜５０部、好ましくは１５〜３５部を混合
した合成樹脂組成物よりなる易開封性を有するフィルム
またはシートであって、結晶化度４０％以下のポリエス
テル樹脂（以下、これを低結晶性ポリエステル樹脂とい
う）とは、例えば、ポリエチレンテレフタレート、ポリ
ブチレンテレフタレート等のテレフタル酸エステル系樹
脂もしくはこれらに第三成分を添加、縮合させて得た樹
脂のうち結晶化度が４０％以下好ましくは２５％以下の
ものをいうのであって、結晶化度が４０％以上のもので
は熱接着性が得られないのである。しかして、このよう
な結晶化度を有するポリエステル樹脂はポリエステル樹
脂を押し出し後急冷してペレットとする方法で製造され
、又結晶化度は、ポリエステル樹脂の分子量分布、急冷
時の温度、時間等を適宜選択することにより得られるも
のである。そして、本発明ではこの低結晶性ポリエステ
ル樹脂１００部に対してポリオレフィン系樹脂を１〜５
０部、好ましくは１５〜３５部配合するのである。ポリ
オレフィン系樹脂はポリエステル樹脂の熱接着強度を低
減する作用を有しポリエステル樹脂１００部に対して１
〜５０部配合して得たフィルムは、通常の熱接着条件下
で安定した熱接着強度を示すばかりでなく、その値は蓋
材として最適の０．８〜２．６ｋｇ／１５■の引き剥し
強度を示すのである。本発明で使用するポリオレフィン
系合成樹脂としては、低密度ポリエチレン、高密度ポリ
エチレン、直鎖状低密度ポリエチレン、エチレン−酢酸
ビニル共重合体アイオノマー及びポリメチルペンテン等
いずれでもよいが、特に直鎖状低密度ポリエチレンを用
いたものは耐油性に優れ柔らかなフィルムまたはシート
が得られるので好ましい。(Means for solving the problem) That is, the present invention has a crystallinity of 40% or less, preferably 25%.
An easily openable film or sheet made of a synthetic resin composition prepared by mixing 1 to 50 parts, preferably 15 to 35 parts, of a polyolefin resin to 100 parts of a polyester resin with a crystallinity of 40% or less. The following polyester resins (hereinafter referred to as low-crystalline polyester resins) include, for example, terephthalic acid ester resins such as polyethylene terephthalate and polybutylene terephthalate, or resins obtained by adding and condensing a third component to these resins. Of these, those with a crystallinity of 40% or less, preferably 25% or less, are used; if the crystallinity is 40% or more, thermal adhesiveness cannot be obtained. However, polyester resin having such a degree of crystallinity is manufactured by extruding the polyester resin and then rapidly cooling it to form pellets, and the degree of crystallinity is determined by the molecular weight distribution of the polyester resin, the temperature and time during quenching, etc. This can be obtained by making an appropriate selection. In the present invention, 1 to 5 parts of polyolefin resin is added to 100 parts of this low crystalline polyester resin.
0 parts, preferably 15 to 35 parts. Polyolefin resin has the effect of reducing the thermal bonding strength of polyester resin, and is used in amounts of 1 to 100 parts of polyester resin.
The film obtained by blending ~50 parts not only shows stable thermal bonding strength under normal thermal bonding conditions, but also has a peeling value of 0.8 to 2.6 kg/15 cm, which is optimal as a lid material. It shows strength. The polyolefin synthetic resin used in the present invention may be low density polyethylene, high density polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer ionomer, polymethylpentene, etc., but especially linear It is preferable to use density polyethylene because a soft film or sheet with excellent oil resistance can be obtained.
本発明は上記の低結晶性ポリエステル樹脂に対して先に
規定した割合のポリオレフィン系合成樹脂を配合した組
成物をフィルムまたはシートとするのであるが、その成
形手段としては押出し成形法、インフレーション法等適
宜の成形法により厚さ５〜１０００μ程度のフィルムま
たはシートとするのである。このフィルムまたはシート
を蓋材として使用するに当っては該フィルムまたはシー
トを容器本体の開口部に熱接着してもよく、或は、該フ
ィルムまたはシートと紙または他の合成樹脂フィルムま
たはシートを積層したのち該フィルムまたはシート側を
開口部に熱接着してもよい、また、このフィルムまたは
シートを熱接着したものは、前述したように適度の引き
剥し強度を有するために、このフィルムまたはシートを
もって袋体を構成した場合には易開封性包装袋とするこ
ともできる。In the present invention, a film or sheet is formed from a composition obtained by blending a polyolefin synthetic resin in a predetermined ratio with the above-mentioned low-crystalline polyester resin, and the molding method thereof includes an extrusion molding method, an inflation method, etc. A film or sheet having a thickness of about 5 to 1000 μm is formed by an appropriate molding method. When using this film or sheet as a lidding material, the film or sheet may be thermally bonded to the opening of the container body, or the film or sheet may be bonded to paper or other synthetic resin film or sheet. After lamination, the film or sheet side may be thermally bonded to the opening, and the film or sheet that is thermally bonded has appropriate peel strength as described above. If the bag body is made up of these, it can also be made into an easy-to-open packaging bag.
次に、実施例をもって本発明を説明する。Next, the present invention will be explained with examples.
実施例１
厚さ４０μのポリカーボネートフィルム（三菱樹脂（株
）製ニーピロン）と結晶化度１０％の低結晶性ポリエス
テル樹脂（Ｋｏｄａｒ、 ＰＥＴＧ ６７６３）に直鎖
状低密度ポリエチレン（出水石化（株）製モアチック０
１３８）１）を第１表に示す割合で混合して得られた厚
さ２５μの易開封性を有するフィルムとを熱接着温度２
００℃、圧力２．０ｋｇ／ｃｄで１．０秒間熱接着する
。熱接着された積層フィルムのフィルム間の熱接着強度
を示すと第１表の通りである。Example 1 Linear low-density polyethylene (manufactured by Izumi Petrochemical Co., Ltd.) was applied to a polycarbonate film with a thickness of 40 μm (Kneepilon, manufactured by Mitsubishi Plastics Co., Ltd.) and a low-crystalline polyester resin (Kodar, PETG 6763) with a degree of crystallinity of 10%. Moretic 0
138) A 25μ thick easily openable film obtained by mixing 1) in the proportions shown in Table 1 was bonded at a thermal bonding temperature of 2.
Thermal bonding is performed at 00°C and a pressure of 2.0 kg/cd for 1.0 seconds. Table 1 shows the thermal adhesion strength between the thermally bonded laminated films.
第１表 混合比と熱接着強度
この結果より低結晶性ポリエステル樹脂のみからなるフ
ィルムは熱接着強度が最適の引き剥し強度より大であり
、また、直鎖状低密度ポリエチレンを５０部以上混合し
たものは熱接着強度が弱く剥離してしまった。Table 1: Mixing ratio and thermal adhesion strength These results show that the thermal adhesion strength of a film made only of low-crystalline polyester resin is greater than the optimum peel strength, and that the film made only of low-crystalline polyester resin has a thermal adhesion strength greater than the optimum peel strength. The heat bonding strength of the product was weak and it peeled off.
実施例２
実施例１で使用したものと同じ低結晶性ポリエステル樹
脂と直鎖状低密度ポリエチレンを用い第２表に示す割合
で混合して得られた厚さ２５μの易開封性を有するフィ
ルムと実施例１で使用したものと同じ厚さ４０μのポリ
カーボネートフィルムとを熱接着温度１６０℃、圧力２
．０ｋｇ／ａｄで１．０秒間熱液着したところ、その熱
接着強度は第２表の通りである。Example 2 An easy-to-open film with a thickness of 25μ obtained by mixing the same low-crystalline polyester resin and linear low-density polyethylene used in Example 1 in the proportions shown in Table 2. The same 40μ thick polycarbonate film used in Example 1 was bonded at a temperature of 160°C and a pressure of 2.
．． When hot liquid bonded for 1.0 seconds at 0 kg/ad, the thermal adhesive strength is shown in Table 2.
第２表 混合比と熱接着強度
なお、実施例１及び２では結晶化度１０％の低結晶性ポ
リエステル樹脂を使用したが、結晶化度６０％の結晶性
ポリエステル樹脂を使用したポリエステルフィルムはフ
ィルム同志でも熱接着しなかった。Table 2: Mixing ratio and thermal adhesion strength In Examples 1 and 2, a low-crystalline polyester resin with a crystallinity of 10% was used, but a polyester film using a crystalline polyester resin with a crystallinity of 60% Comrade also did not hot glue.
（効果）
以上述べたように、本発明は低結晶性ポリエステル樹脂
を主体としポリオレフィン樹脂を熱接着強度低減剤とし
て混合した組成物よりなるフィルムまたはシートであっ
て、該フィルムまたはシートは相溶性が大きく全面均一
なフィルムまたはシートが得られ又熱接着条件の幅が大
きいため安定した熱接着強度が得られ、その強度は適度
の引き剥し強度であるので、これより易開封性を有する
蓋材又は容器本体や包装袋が容易に得られるのである。(Effects) As described above, the present invention is a film or sheet made of a composition containing a low-crystalline polyester resin as a main component and a polyolefin resin as a thermal adhesive strength reducing agent, and the film or sheet has compatibility. A large, uniform film or sheet can be obtained over the entire surface, and stable thermal bonding strength can be obtained due to a wide range of thermal bonding conditions.The strength is suitable for peeling, so it is possible to obtain a lid material or sheet that is easier to open. The container body and packaging bag can be easily obtained.
Claims (1)
対してポリオレフィン系樹脂１〜５０部を混合した合成
樹脂組成物よりなる易開封性を有するフィルムまたはシ
ート ２、ポリオレフィン系樹脂が直鎖状低密度ポリエチレン
である特許請求の範囲第１項記載の易開封性を有するフ
ィルムまたはシート[Claims] 1. An easily openable film or sheet made of a synthetic resin composition prepared by mixing 1 to 50 parts of a polyolefin resin with 100 parts of a polyester resin having a crystallinity of 40% or less. 2. A polyolefin resin composition The easily openable film or sheet according to claim 1, wherein the resin is linear low-density polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61231335A JPS6387222A (en) | 1986-10-01 | 1986-10-01 | Film or sheet with easily tearing property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61231335A JPS6387222A (en) | 1986-10-01 | 1986-10-01 | Film or sheet with easily tearing property |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6387222A true JPS6387222A (en) | 1988-04-18 |
| JPH0262388B2 JPH0262388B2 (en) | 1990-12-25 |
Family
ID=16922024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61231335A Granted JPS6387222A (en) | 1986-10-01 | 1986-10-01 | Film or sheet with easily tearing property |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6387222A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5924667A (en) * | 1982-07-31 | 1984-02-08 | 大日本印刷株式会社 | Cover material |
| JPS5959444A (en) * | 1982-09-30 | 1984-04-05 | 大日本印刷株式会社 | Cover material |
| JPS60180833A (en) * | 1984-02-29 | 1985-09-14 | 東レ株式会社 | Easy-open heat-seal package |
-
1986
- 1986-10-01 JP JP61231335A patent/JPS6387222A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5924667A (en) * | 1982-07-31 | 1984-02-08 | 大日本印刷株式会社 | Cover material |
| JPS5959444A (en) * | 1982-09-30 | 1984-04-05 | 大日本印刷株式会社 | Cover material |
| JPS60180833A (en) * | 1984-02-29 | 1985-09-14 | 東レ株式会社 | Easy-open heat-seal package |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0262388B2 (en) | 1990-12-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |