JPH01500102A - sealable film - Google Patents

sealable film

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Publication number
JPH01500102A
JPH01500102A JP62503336A JP50333687A JPH01500102A JP H01500102 A JPH01500102 A JP H01500102A JP 62503336 A JP62503336 A JP 62503336A JP 50333687 A JP50333687 A JP 50333687A JP H01500102 A JPH01500102 A JP H01500102A
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film
weight
resin
base layer
film according
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JP2933625B2 (en
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ボセール　ベルナール　ルイ　リュック
オルソン　ステファン　ベルティル
ウィルム　ウィリアム　フラン　マリア　ジョゼフ
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エクソン　ケミカル　パテンツ　インコーポレーテッド
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B32B2307/518—Oriented bi-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/91—Product with molecular orientation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y10T428/24967—Absolute thicknesses specified
    • Y10T428/24975—No layer or component greater than 5 mils thick
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2813—Heat or solvent activated or sealable
    • Y10T428/2817—Heat sealable
    • Y10T428/2826—Synthetic resin or polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31725—Of polyamide
    • Y10T428/3175—Next to addition polymer from unsaturated monomer[s]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31913—Monoolefin polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31913—Monoolefin polymer
    • Y10T428/3192—Next to vinyl or vinylidene chloride polymer

Landscapes

  • Laminated Bodies (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるため要約のデータは記録されません。 (57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 封止可能なフィルム 本発明はポリプロピレンを主成分とし、熱の適用によって封止できるフィルムに 関する。[Detailed description of the invention] sealable film The present invention is a film based on polypropylene that can be sealed by the application of heat. related.

様々なポリプロピレンフィルムが、例えば英国特許第２．０２８，１６８Ａ、欧 州特許第１３５．１７８号および独国特許第３，２４７．９８８号に記載されて おり、ここで該フィルムのコアまたは基質はポリプロピレンである。種々の添加 物、例えばいくつかのモジュラス改良剤、いくつかの帯電防止性媒体、シロキサ ン類および顔料が添加できる。Various polypropylene films are described, for example, in British Patent No. 2.028,168A, European Patent No. Described in State Patent No. 135.178 and German Patent No. 3,247.988 The core or substrate of the film is polypropylene. various additions substances, such as some modulus modifiers, some antistatic media, siloxas pigments and pigments can be added.

しかしながら、これら文献のいずれも、以前知られていたポリオレフィンフィル ムと比較して大幅に改善された封止強度を有するフィルムを得ることができるこ とを教示していない、我々は、封止層に唯一種の成分のみを有する従来公知のフ ィルムよりも改善された封止強度特性を示す、唯一っの成分のみを必要とする封 止層をもつフィルム、即ち封止強度が同一の封止温度でより改善されているか、 あるいは同一の封止強度がより低い温度で得ることのできるフィルムを工夫した 。However, none of these documents It is possible to obtain a film with significantly improved sealing strength compared to other films. However, we do not teach conventional fluorophores having only one type of component in the sealing layer. A seal that requires only one ingredient and exhibits improved seal strength properties than films. A film with a sealing layer, i.e. whether the sealing strength is better at the same sealing temperature; Alternatively, we devised a film that can achieve the same sealing strength at a lower temperature. .

本発明によれば、フィルム、特に封止可能なフィルムは７０〜９７重量％、好ま しくは７０〜９０重量％のポリオレフィンおよび３〜３０、好ましくは１０〜３ ０重量％の該ポリオレフィンよりも低分子量の樹脂を含む基層を含有し、該層は 少な（ともその表面の一方に、該基層の重量基準で１〜２０重量％のフィルム層 を有し、該層は８０〜９９重量％のプロピレンと１〜２０重量％のエチレンとの ランダム・コポリマーを含む。According to the invention, the film, in particular the sealable film, preferably contains between 70 and 97% by weight. or 70 to 90% by weight of polyolefin and 3 to 30, preferably 10 to 3 0% by weight of a base layer containing a resin having a lower molecular weight than the polyolefin; A film layer of 1 to 20% by weight based on the weight of the base layer on one of its surfaces. The layer has a composition of 80-99% by weight propylene and 1-20% by weight ethylene. Contains random copolymers.

これらのフィルムは包装工業において使用でき、かつかかるフィルムに対して要 求される、例えば十分に高いモジュラスおよび優れた透明度などの厳しい基準を 満たすことができる。更に、これらは良好な遮断特性、即ち水蒸気、ガス、特に 酸素に対する低い透過率を存する。これらフィルムはまた優れた封止強度特性を も有し、かつ熱封止包装において特に有用であるが、セロファンが伝統的に利用 されている他の包装分野、例えばねじり（ひねり）包装などにおいて有用である 。These films can be used in the packaging industry and meet the requirements for such films. meet the exacting standards required, e.g. sufficiently high modulus and good transparency. can be met. Furthermore, they have good barrier properties, i.e. water vapor, gases, and especially It has a low permeability to oxygen. These films also have excellent sealing strength properties. and is particularly useful in heat-seal packaging, although cellophane is traditionally used It is useful in other packaging fields such as twist packaging, etc. .

基層はポリオレフィンと低分子量樹脂とで構成される。このポリオレフィンは、 好ましくは一分子当たり２〜８、好ましくは２〜４の炭素原子を含むモノ−α− オレフィンのポリマーである。The base layer is composed of polyolefin and low molecular weight resin. This polyolefin is Mono-α- preferably containing 2 to 8, preferably 2 to 4 carbon atoms per molecule It is an olefin polymer.

従って、該ポリマーは以下のオレフィンの一種のホモポリマーであり得る。即ち 、エチレン、プロピレン、ブデンー１、および４−メチルペンテン−１あるいは ヘキセン、もしくはこれらオレフィンの２種またはそれ以上のモノマーのコポリ マーであってもよい、該フィルムの基層に特に適した物質は、ポリプロピレン、 特にプロピレンの高分子量で立体規則性の支配的な結晶性ポリマーである。また 、プロピレンと、２０重量％までの他のオレフィン、例えばエチレンとのコポリ マーも使用できる。特に好ましいポリオレフィンは、ＡＳＴＭ　Ｄ１５０５に従 って２３℃で測定した密度が０．８６〜０．９２　ｇ　／　ｃｃであり、かつＡ ＳＴＭ　Ｄ１２３８に従って測定した（２３０℃にて２．１６ｋｇ）メルトフロ ーインデックスが１〜１５ｇ／１０分であるアイソタクチンクポリプロピレンで ある。これは、触媒として、例えばＡｚｃｚ、およびＴｉＣｊ！、を用いてチー グラー重合法で作製できる。Therefore, the polymer may be a homopolymer of one of the following olefins. That is, , ethylene, propylene, budene-1, and 4-methylpentene-1 or Hexene or a copolymer of two or more monomers of these olefins Particularly suitable materials for the base layer of the film, which may be polymers, include polypropylene, In particular, propylene is a crystalline polymer with a high molecular weight and dominant stereoregularity. Also , a copolymer of propylene and up to 20% by weight of other olefins, such as ethylene. Mar can also be used. Particularly preferred polyolefins are according to ASTM D1505. The density measured at 23°C is 0.86 to 0.92 g/cc, and A Melt flow measured according to STM D1238 (2.16 kg at 230°C) - Isotactic tink polypropylene with an index of 1 to 15 g/10 min. be. This includes, for example, Azcz and TiCj! as catalysts. , using It can be produced using the Glar polymerization method.

該基本ポリマーの他の成分は低分子量樹脂、好ましくは水素化樹脂である。この 樹脂は、該ポリオレフィンの分子量よりも小さな分子量をもち、通常はｓ、　ｏ 　ｏ　ｏ以下好ましくは１．０００以下、例えば５００〜１．０００である。こ の樹脂は天然もしくは合成樹脂であり得、かつＡＳＴＭ　Ｅ２８に従って測定し た軟化点６゜〜１８０℃、例えば８０〜１５０℃、より好ましくは１００〜１４ ０℃、特に１２０℃〜１４０℃をもつことができる。Other components of the base polymer are low molecular weight resins, preferably hydrogenated resins. this The resin has a molecular weight smaller than that of the polyolefin, and is usually s, o. It is preferably 1.000 or less, for example 500 to 1.000. child The resin may be a natural or synthetic resin and is measured according to ASTM E28. Softening point: 6° to 180°C, for example 80 to 150°C, more preferably 100 to 14°C 0°C, especially 120°C to 140°C.

後に水素添加できる適当な樹脂は炭化水素樹脂、ケトン樹脂、ポリアミド樹脂、 コロホニー、クマロン樹脂、テルペン樹脂、塩素化脂肪族または芳香族炭化水素 樹脂である。炭化水素樹脂の例はコークス炉ガス、分解ナフサ、ガス油およびテ ルペン油のポリマーである。Suitable resins that can be hydrogenated later include hydrocarbon resins, ketone resins, polyamide resins, colophony, coumaron resins, terpene resins, chlorinated aliphatic or aromatic hydrocarbons It is resin. Examples of hydrocarbon resins are coke oven gas, cracked naphtha, gas oil and oil. It is a polymer of lupene oil.

特に好ましい水素添加樹脂は水添石油樹脂である。これらは、通常熱重合された ｆ気分解石油蒸留画分、特に２０〜２８０℃の範囲の沸点をもつ百分の重合物の 接触水添により調製される。これらの両分は通常分子内に１またはそれ以上の不 飽和環をもつ化合物、例えばシクロジエン類、シクロアルケン類およびインデン 類である。また、不飽和炭化水素の触媒重合により得られた樹脂を水添すること も可能である。Particularly preferred hydrogenated resins are hydrogenated petroleum resins. These are usually thermally polymerized f gas cracked petroleum distillation fractions, especially 100% polymers with boiling points in the range 20-280°C Prepared by catalytic hydrogenation. Both of these components usually contain one or more unsaturated molecules in the molecule. Compounds with saturated rings, such as cyclodienes, cycloalkenes and indenes It is a kind. In addition, hydrogenation of resin obtained by catalytic polymerization of unsaturated hydrocarbons is also possible.

水素添加する前に、重合された樹脂は通常飽和炭化水素溶媒、例えばヘプタン中 に溶解する。使用する水添触媒はニッケル、還元ニッケルまたは硫化モリブデン であり得る。水添は、２００〜３３０℃、好ましくは２１０〜２３０℃の温度に て、２０〜１２０気圧、より好ましくは３０〜９０気圧の下で、５〜７時間行わ れる一段階で実施できる。触媒を炉別した後、溶媒を蒸留により除き、再循環の ために回収する。高品位の水添炭化水素樹脂の高い歩留りを与える改良水添法は 欧州特許第００８２７２６号（出願番号第８２３０６８５３．１）に記載され、 特許請求されている。Before hydrogenation, the polymerized resin is usually dissolved in a saturated hydrocarbon solvent, such as heptane. dissolve in The hydrogenation catalyst used is nickel, reduced nickel or molybdenum sulfide. It can be. Hydrogenation is carried out at a temperature of 200-330°C, preferably 210-230°C. for 5 to 7 hours under 20 to 120 atmospheres, more preferably 30 to 90 atmospheres. It can be implemented in one step. After the catalyst is separated from the furnace, the solvent is removed by distillation and recycled. Collect for. An improved hydrogenation process that provides high yields of high-grade hydrogenated hydrocarbon resins is Described in European Patent No. 0082726 (application number 82306853.1), A patent has been claimed.

基層中のポリオレフィン対低分子量樹脂の割合は７０〜９７、好ましくは７０〜 ９０重量％のポリオレフィンおよび３〜３０、好ましくは１０〜３０重量％の低 分子量樹脂である。より好ましくは、この相対的量は、夫々７５〜８５重量％お よび１５〜２０重量％、例えば約８０重量％および２０重量％である。The ratio of polyolefin to low molecular weight resin in the base layer is between 70 and 97, preferably between 70 and 97. 90% by weight polyolefin and 3-30, preferably 10-30% by weight low It is a molecular weight resin. More preferably, the relative amounts are between 75 and 85% by weight, respectively. and 15-20% by weight, such as about 80% and 20% by weight.

このフィルムの基層またはコアは、表面の一方、好ましくは両方に、１〜２０重 量％、好ましくは１〜１０重量％および特に約５重量％（基層の重量基準で各表 面に対して）のコポリマーを有し、該コポリマーは８０〜９９重量％のプロピレ ンおよび１〜２０重量％のエチレンを含み、このようなコポリマーはしばしばラ ンダムコポリマーと呼ばれる。このフィルム層を構成する該コポリマーは好まし くは９０〜９９重量％、特に９４〜９８重量％の、例えば約９５．５重量％のプ ロピレンを含み、残部はエチレンであり、かつこのコポリマーは熱封止性を付与 するのに特に有用である。The base layer or core of this film has 1 to 20 ply on one, preferably both, surfaces. % by weight, preferably from 1 to 10% by weight and especially about 5% by weight (each table based on the weight of the base layer). 80-99% by weight of propylene and 1 to 20% by weight of ethylene, such copolymers are often called a random copolymer. The copolymer constituting this film layer is preferably preferably 90-99% by weight, especially 94-98% by weight, for example about 95.5% by weight. Contains lopylene, the balance is ethylene, and this copolymer provides heat sealing properties It is particularly useful for

このプロピレンとエチレンとのランダムコポリマーは、通常、ＡＳＴＭ　Ｄ１５ ０５により２３℃で測定した密度０．８６〜０．９２ｇ／ｃｃおよびＡＳＴＭ　 Ｄ１２３８　（２３０℃および２．１６−なる条件）により測定したメルトフロ ーインデックス２ル１５ コポリマーである．これは、チーグラー触媒、例えばＡＩ！（１。This random copolymer of propylene and ethylene usually has an ASTM D15 Density 0.86-0.92 g/cc measured at 23°C by 05 and ASTM Melt flow measured by D1238 (230℃ and 2.16-conditions) - Index 2 le 15 It is a copolymer. This is a Ziegler catalyst, such as AI! (1.

および７　ｉ　Ｃ　１　ａを用いる周知の重合法によって作製できる。It can be produced by a well-known polymerization method using 7iC1a.

本発明のフィルム、即ち多層フィルムは、該基層および表面層の諸成分（必要な らば帯電防止媒質、ブロッキング副およびスリップ助剤などの他の成分を含むこ とができる）を公知の方法、好ましくは同時押出技術により結合することにより 有利に形成される。The film of the present invention, that is, the multilayer film, includes various components of the base layer and the surface layer (as necessary). May contain other ingredients such as antistatic media, blocking adjuvants and slip aids. ) by combining them by known methods, preferably coextrusion techniques. Advantageously formed.

本発明の多層フィルムは延伸されていな（ともあるいは−軸延伸されていてもよ いが、好ましくはフィルム面内で互いに直交する２つの方向に延伸して２軸延伸 して、該フィルムに強度を付与することもできる．平坦なフィルムの延伸はテン クー法で実施でき、また延伸管状フィルムは、環状ダイから多層管形状にあるポ リマー材料を同時押出しし、押出された管（成形管）を冷却し、鉄管をいわゆる 「バブル（ｂｕｂｂ　１２　ｅ）法」によって再加熱し、膨張させて、横方向の 延伸を与え、かつ同時に該管を縦方向に伸ばして、該フィルムを長さ方向に延伸 することにより有利に得られる。The multilayer film of the present invention may be unoriented (or axially oriented). However, biaxial stretching is preferably carried out by stretching in two directions orthogonal to each other within the film plane. It is also possible to add strength to the film. Stretching of flat film is done by The drawn tubular film can be produced by the Coo process, and the stretched tubular film can be produced from a circular die to a point in the form of a multilayer tube. The reamer material is co-extruded, the extruded tube (formed tube) is cooled, and the iron tube is made into a so-called iron tube. It is reheated and expanded by the "bubble (bubb 12e) method", and the horizontal direction is Stretch the film longitudinally by applying stretching and simultaneously stretching the tube longitudinally. It is advantageous to do so.

このフィルムは次いで、好ましくは「ヒートセラトコされる。即ち、該フィルム の寸法安定性が、これを加熱することにより改良され、一方熱収縮に対しては制 限される。該加熱はフィルムを形成する該ポリマーのガラス転移点以上かつその 融点以下の温度で行われる。This film is then preferably "heat-cerated", i.e. the film is The dimensional stability of is improved by heating it, while the thermal shrinkage is limited. limited. The heating is performed at a temperature above the glass transition point of the polymer forming the film and above the glass transition point of the polymer forming the film. It is carried out at a temperature below the melting point.

これらのフィルムは意図する用途に応じてその厚さを変えるこきができる。しか し、通常は２〜１５０μの厚さのフィルムが適当である。包装用のフィルムは通 常１０〜６０μの厚さのものである。各外層の厚さは通常０．０５〜２．５μで ある。These films can be made to vary in thickness depending on the intended use. deer However, a film having a thickness of 2 to 150 microns is usually suitable. Packaging film is commonly used. It is usually 10 to 60 microns thick. The thickness of each outer layer is usually 0.05-2.5μ be.

実施例 実施例において、異る組成の同時押出しフィルムが作製され、その封止適性、剛 性、光学特性並びに遮断特性につき比較した。Example In the examples, coextruded films of different compositions were prepared and their sealability, rigidity The properties, optical properties, and blocking properties were compared.

これらのフィルムは、該フィルムの面内で相互に直交する２つの方向に延伸する ことにより２軸延伸されて、強度が付与されたテンター法を利用して、機械方向 に５００％および横方向に９００％の延伸を与えた。各２軸延伸されたフィルム は２つの厚さ１μの封止層をもち、しかも全厚さは約２２μであった。These films are stretched in two mutually orthogonal directions within the plane of the film. By using the tenter method, which is biaxially stretched and given strength, 500% and 900% transverse stretching was applied. Each biaxially stretched film had two 1μ thick sealing layers, and the total thickness was about 22μ.

比較用の第１のフィルムは、ＡＳＴＭ　Ｄ１５０５により２３℃で測った密度約 ０．９０ｇ／ｃｃおよびＡＳＴＭ　Ｄ１２３８（２３０℃、２．１６　ｋｇなる 条件）により測定したメルトフローインデックス２．８ｇ／１０分を有するアイ ソタクチックポリプロピレンのコアからなる。該コアの両側には約９５，５重量 ％のプロピレンと４．５重量％のエチレンとのランダムコポリマーの表面フィル ムがあった。これはＡＳＴＭ　Ｄ１５０５により２３℃で測った密度約０．９０ ｇ／ｃｃおよびＡＳＴＭ　Ｄ１２３８（２３０℃、２．１６ｋｇなる条件）によ り測定したメルトフローインデックス６．５ｇ／１０分を有するアイソ°タクチ ックコポリマーであった。The first comparative film had a density of approximately 0.90g/cc and ASTM D1238 (230℃, 2.16kg) An eye having a melt flow index of 2.8 g/10 min measured under Consists of a core of sotactic polypropylene. Approximately 95,5 weight on each side of the core Surface fill of random copolymer of % propylene and 4.5% ethylene by weight There was a problem. This is a density of approximately 0.90 measured at 23°C by ASTM D1505. g/cc and according to ASTM D1238 (230℃, 2.16kg) Iso° Tactical with a melt flow index of 6.5 g/10 min measured by It was a block copolymer.

第２のフィルムは第１のフィルムと同じであるが、コアは該第１のフィルムのコ ′Ｔとして用いたアイソタクチックポリプロピレン８０重量％と２０重量％の水 添石油樹脂とのブレンドである点で異る。この樹脂は、沸点範囲２０〜２８０℃ をもつ蒸気分解石油蒸留画分の熱重合物を接触水添することにより調製した。こ の水添法は欧州特許第００８２７２６号（出願番号８２３０６８５３．１）に記 載のようにして実施した。得られた樹脂は環球式軟化点１２５℃によって特徴付 けられる。The second film is the same as the first film, but the core is a core of the first film. 80% by weight of isotactic polypropylene used as T and 20% by weight of water It differs in that it is a blend with added petroleum resin. This resin has a boiling point range of 20-280℃ was prepared by catalytic hydrogenation of a thermal polymer of a steam cracked petroleum distillation fraction with child The hydrogenation method is described in European Patent No. 0082726 (application number 82306853.1). It was carried out as described. The resulting resin was characterized by a ring and ball softening point of 125°C. I get kicked.

添付第１図〜第７図は、封止強度、熱間粘着性、曇り度、光沢、剛性および遮断 性に関し、フィルム１（比較例）およびフィルム２（本発明）について得られた 結果を示すものである。Attached Figures 1 to 7 show sealing strength, hot adhesion, haze, gloss, rigidity, and barrier properties. Regarding the properties, the results obtained for Film 1 (Comparative Example) and Film 2 (Invention) This shows the results.

これらのテストは以下のようにして行った。These tests were conducted as follows.

封止強度 これは該フィルムの“冷時（ｃｏｌｄ）’ヒートシール強度であり、該シールを 周囲温度まで冷却し、かつ該シールの十分な潜在強度が発現された後に測定する 。Sealing strength This is the “cold” heat seal strength of the film, and is the “cold” heat seal strength of the film. Measured after cooling to ambient temperature and the full potential strength of the seal has developed. .

ヒートシールを行うためには、デザイン＆テストコンサルト（Ｄｅｓｉｇｎ　＆ 　Ｔｅ５ｔ　Ｃｏｎ５ｕｌｔ）Ａ　Ｂ　［ブ０７−スウエーデン（Ｂｒｏｍｍａ −Ｓｗｅｄｅｎ）　］からのパパックフォースフホットタックテスタ　Ｐａｃｋ −ｆｏｒｓｋ　Ｈｏｔ　Ｔａｃｋ　Ｔｅ５ｔｅｒ）モデル５２−Ｂを用いた。巾 １．５　ｍｍ。In order to perform heat sealing, design & test consultation (Design & Te5t Con5ult) A B [B07-Sweden (Broma -Sweden)] Papak Force Hot Tack Tester Pack -forsk Hot Tack Teter) Model 52-B was used. Width 1.5 mm.

長さ約２８０ｍｍのストリップを折り返して該装置の加熱されたジョー間で一緒 に封止した。Strips approximately 280 mm long are folded back together between the heated jaws of the device. It was sealed.

形成された封止部は約１５Ｘ５ｍｍの面積を有する。この封止上ノ保圧条件は、 ５バールの圧力および滞留時間０．５秒にて一定に保った。封止強度を測定する ためには、封止用ジョーを開放する際に、熱間粘着性測定に使用する自動剥離作 用が動作しないようなモードで該装置を用いる。その代りに、該封止部は室温ま で冷却される。次いで、該ストリップの未封止端部を引張り試験器のジョーに取 付ける。５０８ｍｍ／分の速度で該封止部を破壊するのに要する力を該引張り試 験器で記録し、封止強度をｋｇ／１５ｍｍなる単位で表す。The seal formed has an area of approximately 15 x 5 mm. This sealing pressure condition is A pressure of 5 bar and a residence time of 0.5 seconds were kept constant. Measure sealing strength For this purpose, the automatic peeling operation used for hot tack measurements must be performed when opening the sealing jaws. Use the device in such a mode that the device is inactive. Instead, the seal is kept at room temperature. cooled down. The unsealed end of the strip is then placed in the jaws of a tensile tester. wear. The force required to break the seal at a speed of 508 mm/min was measured in the tensile test. The sealing strength is recorded in kg/15mm.

黙皿猪１判 これは、封止を行った直後で、かつ該ヒートシールを形成するのに用いた熱エネ ルギーが散逸する前に測定したヒートシールの強度である。この熱間粘着性は同 じパックフォースフ（Ｐａｃｋｆｏｒｓｋ）装置を用いて行った。ヒートシール を上記のように行い、封止用ジョーの開放直後に剥離作用を自動的に開始させ、 該シールを破壊するのに要する力を自動的に記録し、該熱間粘着性をｋｆ／　１ ５１単位で表す。Mokusara boar 1 size This occurs immediately after sealing and after the thermal energy used to form the heat seal. This is the strength of the heat seal measured before the energy is dissipated. This hot tack is the same This was done using a Packforsk apparatus. heat seal as described above, and the peeling action is automatically started immediately after the sealing jaw is opened, Automatically record the force required to break the seal and measure the hot tack by kf/1 Expressed in 51 units.

この剥離操作は、制御された遅延時間（ジョーの開放時点と剥離操作開始時点と の間の時間）にて行い、かつ制御された剥離速度で行う、全ての熱間粘着性測定 に対し、以下のような一定条件を用いた。即ち、遅延時間＝０．９秒；剥離速度 −１００ｗｎ／　ｓ　。This stripping operation is performed using a controlled delay time (between when the jaws open and when the stripping operation starts). All hot tack measurements performed at a controlled peel rate For this, the following certain conditions were used. That is, delay time = 0.9 seconds; peeling speed -100wn/s.

盈立廉主主延友沢 フィルムのこれら光学特性はガードナーヘイズメータ（ＧａｒｄｎｅｒＨａｚｅ ｍｅｔｅｒ）を用い、曇り度はＡＳＴＭ　Ｄ１００３により、また光沢はＡＳＴ Ｍ　Ｄ５２３により測定した。Lord Nobu Yuzawa These optical properties of the film are measured using a Gardner Haze meter. The haze is determined by ASTM D1003, and the gloss is determined by AST. Measured by MD523.

Ｅ−モジュラス フィルムの剛性の尺度である弾性率はＤＩＮ５３４５７により、幅１５ｍｍのフ ィルムサンプルの引張りテストから測定した。E-modulus The elastic modulus, which is a measure of film stiffness, is determined by DIN 53457 for a film with a width of 15 mm. It was determined from a tensile test of film samples.

遮断特性 湿度および酸素遮断特性は、水蒸気透過率（ＷＶＴＲ）および酸素透過率（ＯＴ Ｒ）を測定することにより決定した。ＷＶＴＲはＡＳＴＭ　Ｆ３７２に従って３ ７．４℃で１００％相対温度の下で、モダーン　コントロールズ　インコーホレ ーテッド（ＭｏｄｅｒｎＣｏｎｔｒｏｌｓ　Ｉｎｃｏｒｐｏｒａｔｅｄ）からの バーメトラン（Ｐｅｒｍｅｔｒａｎ）　Ｗ　５装置を用いて測定した。ＯＴＲは ＡＳＴＭ　Ｄ３９８５に従って、２７℃にて、これもモダーン　コントロールズ 　インコーホレーテッドからのオキストラン　ツイン（Ｏｘｔｒａｎ　Ｔｗｉｎ ）装置を用いて測定した。Breaking characteristics Humidity and oxygen barrier properties are determined by water vapor transmission rate (WVTR) and oxygen transmission rate (OT It was determined by measuring R). WVTR is 3 according to ASTM F372 Modern Controls Incohole under 100% relative temperature at 7.4℃ From Modern Controls Incorporated Measurements were made using a Permetran W5 device. OTR is According to ASTM D3985 at 27°C, also by Modern Controls. Oxtran Twin from Incophorated ) was measured using a device.

第１図から、フィルム２の封止強度（ｋｇ／　１５ｍｍ）が１００〜１１０℃お よび１３０℃以上の温度にて、フィルム１よりもずっと大きいことを理解できる 。１１０〜１３０℃の範囲ではフィルム１と同等かそれ以上の封止強度である。From Figure 1, the sealing strength (kg/15mm) of film 2 is 100~110℃. It can be seen that it is much larger than Film 1 at temperatures above 130℃ and 130℃. . In the range of 110 to 130°C, the sealing strength is equal to or higher than that of Film 1.

第２図からは、フィルム２の熱間粘着性（ｋｇ／　１５ｍｍ）が、約１１０℃以 上の温度に対し、フィルム１よりも著しく良好であることを理解できる。From Figure 2, the hot tackiness (kg/15mm) of film 2 is approximately 110°C or higher. It can be seen that for the above temperatures it is significantly better than film 1.

第３図および第４図から、フィルム１と比較してフィルム２はより低い曇り度お よびより高い光沢をもつことがわかる。From Figures 3 and 4, it can be seen that compared to Film 1, Film 2 has lower haze and It can be seen that it has a higher gloss.

第５図からは、フィルム２の剛性（Ｅ−モジュラスから測定）がフィルム１の剛 性よりも著しく高いことが理解できる。From Figure 5, the stiffness of film 2 (measured from E-modulus) is equal to the stiffness of film 1. It can be seen that this is significantly higher than gender.

第６図および第７図からは、フィルム２の遮断特性がフィルム１の該特性よりも 約２倍程良好であることを知ることができる。From FIGS. 6 and 7, it can be seen that the barrier properties of film 2 are better than those of film 1. It can be seen that it is about twice as good.

基層におけろ水添樹脂の比較的少量（２０重量％）での存在により、従来のフィ ルムと比較して上記の如き良好な結果が得られることは全く驚＜べきことである 。The presence of a relatively small amount (20% by weight) of filtrate hydrogenated resin in the base layer makes it possible to It is quite surprising that such good results can be obtained compared to Lum. .

浄＊＜内容をこ変更なし） 浄μ：（内容；ζ−更なし） 手続補正書（方式） 特許庁長官　吉　１）文　毅　殿 １、事件の表示　ＰＣＴ／ＧＢ８７１００３７４２、発明の名称　封止可能なフ ィルム ３、補正をする者 事件との関係　出願人 ５、補正命令の日付　自　発Pure *＜Contents unchanged） Pure μ: (Content; ζ - no change) Procedural amendment (formality) Yoshi, Commissioner of the Patent Office 1) Takeshi Moon 1. Indication of case PCT/GB871003742, title of invention Sealable flap film 3. Person who makes corrections Relationship to the case: Applicant 5. Date of amendment order: Self-issued

Claims (1)

【特許請求の範囲】 １．７０〜９７重量％のポリオレフィンと３〜３０重量％の該ポリオレフィンよ りも小さな分子量をもつ樹脂とを含む基層を含み、該層がその少なくとも一つの 表面に、該基層の重量基準で１〜２０重量％のフィルム層を有し、該フィルム層 が８０〜９９重量％のプロピレンおよび１〜２０重量％のエチレンとのコポリマ ーを含むことを特徴とするフィルム。 ２．該基層が７０〜９０重量％のポリオレフィンと１０〜３０重量％の上記樹脂 を含む請求の範囲第１項記載のフィルム。 ３．上記コポリマーがランダムコポリマーである請求の範囲第１項または第２項 記載のフィルム。 ４．上記基層中のポリオレフィンが一分子当たり２〜４個の炭素原子を含むモノ −α−オレフィンのポリマー、好ましくはポリプロピレンである上記請求の範囲 のいずれか１項に記載のフィルム。 ５．該ポリプロピレンが、ＡＳＴＭ　Ｄ１５０５に従って２３℃にて測った密度 ０．８６〜０．９２ｇ／ｃｃおよびＡＳＴＭ　Ｄ１２３８（２３０℃、２．１６ ｋｇなる条件）に従って測定したメルトフローインデックス１〜１５ｇ／１０分 を有するポリプロピレンである請求の範囲第４項記載のフィルム。 ６．上記樹脂が水添されている上記請求の範囲のいずれか１項に記載のフィルム 。 ７．上記基層中の水添樹脂が水添石油樹脂である請求の範囲第６項記載のフィル ム。 ８．該水添樹脂が、水添触媒を用いて、２００〜３３０℃の温度にて、熱重合さ れた蒸気分解蒸留画分または触媒重合された不飽和炭化水素画分を水添すること により調製されたものである請求の範囲第７項記載のフィルム。 ９．上記樹脂がＡＳＴＭ　Ｅ２８により測定された軟化点１００〜１４０℃をも つ上記請求の範囲のいずれか１項に記載のフィルム。 １０．上記基層が７５〜８５重量％のポリオレフィンと１５〜２５重量％の樹脂 を含むことを特徴とする上記請求の範囲のいずれか１項に記載のフィルム。 １１．上記基層が、その各表面上に、該基層の重量基準で、上記ランダムコポリ マーを含む上記フィルム層１〜１０重量％を有する上記範囲のいずれか１項に記 載のフィルム。 １２．上記ランダムコポリマーが９４〜９８重量％のプロピレンと２〜６重量％ のエチレンを含む上記請求の範囲のいずれか１項に記載のフィルム。 １３．上記ランダムコポリマーが、ＡＳＴＭ　Ｄ１５０５に従って２３℃で測定 した密度０．８６〜０．９２ｇ／ｃｃおよびＡＳＴＭＤ１２３８（２３０℃、２ ．１６ｋｇなる条件）に従って測ったメルトフローインデックス２〜１５ｇ／１ ０分をもつアイソタクチックプロピレン−エチレンコポリマーである上記請求の 範囲のいずれか１項に記載のフィルム。 １４．上記フィルムが２軸延伸されていることを特徴とする上記請求の範囲のい ずれか１項に記載のフィルム。 １５．上記フィルムが１０〜６０μの厚さをもち、かつ各外部フィルム層の厚さ が０．０５〜２．５μの範囲にある上記請求の範囲のいずれか１項に記載のフィ ルム。[Claims] 1.70 to 97% by weight of polyolefin and 3 to 30% by weight of said polyolefin. and a base layer comprising a resin having a low molecular weight; having a film layer of 1 to 20% by weight based on the weight of the base layer on the surface; copolymers with 80-99% by weight of propylene and 1-20% by weight of ethylene A film characterized by containing -. 2. The base layer contains 70 to 90% by weight of polyolefin and 10 to 30% by weight of the above resin. The film according to claim 1, comprising: 3. Claim 1 or 2, wherein the copolymer is a random copolymer. The film mentioned. 4. Polyolefin in the base layer containing 2 to 4 carbon atoms per molecule - a polymer of α-olefin, preferably polypropylene; The film according to any one of the above. 5. The density of the polypropylene measured at 23°C according to ASTM D1505 0.86-0.92g/cc and ASTM D1238 (230℃, 2.16 Melt flow index 1-15 g/10 min measured according to kg conditions) 5. The film according to claim 4, which is polypropylene having a polypropylene. 6. The film according to any one of the above claims, wherein the resin is hydrogenated. . 7. The film according to claim 6, wherein the hydrogenated resin in the base layer is a hydrogenated petroleum resin. Mu. 8. The hydrogenated resin is thermally polymerized at a temperature of 200 to 330°C using a hydrogenation catalyst. Hydrogenating the steam cracked distillation fraction or the catalytically polymerized unsaturated hydrocarbon fraction 8. The film according to claim 7, which is prepared by. 9. The above resin also has a softening point of 100 to 140°C as measured by ASTM E28. A film according to any one of the preceding claims. 10. The base layer contains 75-85% by weight of polyolefin and 15-25% by weight of resin. A film according to any one of the preceding claims, characterized in that it comprises: 11. The base layer has, on each surface thereof, the random copolymer, based on the weight of the base layer. In any one of the above ranges, the film layer contains 1 to 10% by weight of The film included. 12. The random copolymer contains 94-98% by weight of propylene and 2-6% by weight. A film according to any one of the preceding claims, comprising ethylene. 13. The above random copolymer was measured at 23°C according to ASTM D1505. density 0.86-0.92 g/cc and ASTM D1238 (230°C, 2 ．． Melt flow index 2-15g/1 measured according to the condition of 16kg The above-claimed isotactic propylene-ethylene copolymer having a A film according to any one of the ranges. 14. The method according to the above claim, characterized in that the film is biaxially stretched. The film according to any one of item 1 above. 15. The film has a thickness of 10 to 60μ, and the thickness of each outer film layer The filament according to any one of the above claims, wherein the Lum.
JP62503336A 1986-05-30 1987-05-29 Sealable film Expired - Lifetime JP2933625B2 (en)

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