JPH01182255A - 保香性の優れた食品包装袋 - Google Patents

保香性の優れた食品包装袋

Info

Publication number
JPH01182255A
JPH01182255A JP62335858A JP33585887A JPH01182255A JP H01182255 A JPH01182255 A JP H01182255A JP 62335858 A JP62335858 A JP 62335858A JP 33585887 A JP33585887 A JP 33585887A JP H01182255 A JPH01182255 A JP H01182255A
Authority
JP
Japan
Prior art keywords
film
polybutylene terephthalate
terephthalate resin
bag
food packaging
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
Application number
JP62335858A
Other languages
English (en)
Other versions
JP2506878B2 (ja
Inventor
Shigeru Nezu
茂 根津
Kotaro Taniguchi
幸太郎 谷口
Toshio Konishi
敏夫 小西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Polyplastics Co Ltd
Original Assignee
Polyplastics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Polyplastics Co Ltd filed Critical Polyplastics Co Ltd
Priority to JP62335858A priority Critical patent/JP2506878B2/ja
Priority to EP88312159A priority patent/EP0323128B1/en
Priority to DE3850953T priority patent/DE3850953T2/de
Priority to AT88312159T priority patent/ATE109395T1/de
Priority to KR1019880017433A priority patent/KR940007127B1/ko
Publication of JPH01182255A publication Critical patent/JPH01182255A/ja
Application granted granted Critical
Publication of JP2506878B2 publication Critical patent/JP2506878B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73711—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73711—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented
    • B29C66/73712—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented mono-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73711—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented
    • B29C66/73713—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented bi-axially or multi-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/006—PBT, i.e. polybutylene terephthalate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/005—Oriented
    • B29K2995/0051—Oriented mono-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/005—Oriented
    • B29K2995/0053—Oriented bi-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Wrappers (AREA)
  • Packages (AREA)
  • Seasonings (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Laminated Bodies (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。

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明はポリブチレンテレフタレート樹脂製フィルムを
使用した保谷性の優れた食品包装袋に係わる。
〔従来の技術とその問題点〕
お茶、コーヒー等の嗜好品やチョコレート、ビスケット
類の菓子或いはキムチ、タクアン等　　　　　′の漬物
類の包装には従来から複合フィルムが多く使用されてい
る。複合フィルムを用いる理由は、保谷性の優れた単層
のフィルムではヒートシール性が悪く、製袋が困難であ
るため、ヒートシール性の優れたフィルムと複合化する
ことにより用いているのである。し力）し、フィルム同
士を積層するためこれらは生産性が悪く、経済的でなく
、又その接着部が剥離する場合かあり、包装用素材とし
て適切でない。又、斯かる複合フィルムにおいては、製
袋のためヒートシール性の優れたフィルム、例えばポリ
エチレンやポリプロピレン等のオレフィン類のフィルム
を食品と接する内装に使用することになるが、これらは
ポリ臭と呼ばれる樹脂特有の臭いがあるため、内容物の
香りを損なう場合が多い。
又、ここで用いられる保香性の優れたフィルムとしては
、ナイロン、エチレン−酢酸ビニル共重合体、ポリアク
リロニトリル等が知られているが、安価なインフレーシ
ョン成形法によりフィルムを製造することができず、Ｔ
ダイ法で製造する必要があるため高価なものとなる。
〔問題点を解決するための手段〕
本発明者等はこれらの問題点を解決するため検討した結
果、ポリブチレンテレフタレート樹脂製フィルムが保香
性を有し、かつヒートシール性を有しているため、食品
包装袋の素材として極めて優れた性質を有することを見
出し、更にポリブチレンテレフタレート樹脂の材質及び
フィルム成形条件を選べば経済的にインフレーション成
形法でフィルム化でき、しかも該フィルムは単層でも十
分な強度を有することを見出して、本発明を完成するに
至った。
即ち本発明は、ポリブチレンテレフタレート樹脂からな
るフィルムをヒートシールにより製袋してなる保香性の
優れた食品包装袋を提供するものである。
本発明で使用するポリブチレンテレフタレートとは、１
．４−ブタンジオールとテレフタール酸又はその低級ア
ルコールとのエステルを縮合して得られるポリエステル
であり、ポリブチレンテレフタレートを主体とする共重
合体であってもよい。
又ポリブチレンテレフタレート樹脂には一般の熱可塑性
樹脂及び熱硬化性樹脂に添加される公知の物質を要求性
能に応じ適宜使用することができる。又、本発明の効果
を阻害しない範囲で、目的に応じ少量の他の熱可塑性樹
脂や無機充填剤を補助的に添加使用することもできる。
本発明において、ポリブチレンテレフタレート樹脂をフ
ィルム化する方法は特に限定されるものではない。
インフレーション法はポリエチレンをフィルムに成形す
る場合によく用いられている方法であって、環状の押出
成形口金からプラスチックスを管状に押出し、管内に空
気など流体を吹き込み脹らませて管状のフィルムを成形
する方法である。Ｔダイ法は線状スリット押出成形口金
から押出しフィルムに成形するもので、その生産性は圧
倒的にインフレーション法が優っている。しかしインフ
レーション法は樹脂材料が限定されるので如何なる樹脂
にも適用可能とはいえず、ポリブチレンテレフタレート
樹脂には適用できないものと考えられていた。しかし、
本発明者等は特定のポリブチレンテレフタレート樹脂、
具体的には固有粘度１．０以上の比較的高粘度のものを
選べばインフレーション成形法でもフィルム成形可能で
あることを見出し、かつ斯かるフィルムは従来より商業
生産されているプラスチックスフィルムに比べて特徴的
な物性を持っていることを見出したものである。
インフレーション条件は押出樹脂温度を使用樹脂の融点
より２０〜３０℃上の温度に設定し、１０〜５０ｍ／分
のスピードで引き取りながら、空気圧で押出管状体の直
径を１〜５倍に脹らませるのを標準として行う。引き取
りスピードを上記より低めに設定した場合には押出樹脂
温度も低めに設定するのがよく、押出樹脂温度を上記よ
り高めに設定した場合には引き取りスピードも高めに設
定するのがよい。
しかし固有粘度１．０未満のポリブチレンテレフタレー
ト樹脂を使用した場合にはインフレーション条件を如何
に変えても成形不能である。
物性面等から固有粘度１．０未満のものを使用する必要
のある時はＴダイ法でフィルム化すれば良い。
かかるフィルムには、必要に応じ任意の率で一軸又は二
軸延伸を加えてもよい。
このような方法で得られたポリブチレンテレフタレート
樹脂製フィルムは、保香性を大事にする食品、例えばお
茶、コーヒー等の嗜好品やチョコレート、ビスケット等
の菓子類、キムチ、タクアン等の漬物類の包装に適する
。
従来の保香性を有する複合フィルムを用いた食品包装用
袋としては、ヒートシール性に優れたポリエチレンやポ
リプロピレン等のポリオレフィン類のフィルムを内装に
用いていることが多いが、ポリ臭という樹脂特有の臭い
を有するため、食品の香りを損なう問題がある。
本発明に用いられるポリブチレンテレフタレート樹脂か
らなるフィルムは、特有の臭いもなく又無味であるため
、臭い、味が食品に移ることもない。
又、ポリブチレンテレフタレート樹脂からなるフィルム
はヒートシール性を有し、印刷適性にも優れ、かつ食品
包装袋としての機械的強度を有するため、単層でも使用
可能であり、フィルムの製法によっては透明にすること
ができるので、包装材として好適である。
従来からシーラントとして用いられているフィルムはヒ
ートシール部の機械的な強度が弱（、シール部で切断等
が生じ易く破袋する場合があり、且つフィルム自身の強
度も弱いため、フィルムの厚みを厚くする必要があった
。
一方、ポリブチレンテレフタレート樹脂はヒートシール
部の機械的強度が優れているため、ヒートシール部で切
断せず、輸送、取り扱い時の破袋が生じに＜＜、且つフ
ィルム自身の強度が強いのでフィルムの厚みを薄くする
ことができて経済的である。
例えば、ポリブチレンテレフタレート樹脂のインフレー
ションフィルムの強度は、低密度ホリエチレンやポリプ
ロピレンのインフレーションフィルムに比べ、引張強度
で２〜３倍の強度があり、引裂強度、衝撃強度も優れて
いる。
保谷性の点だけから言えばポリブチレンテレフタレート
樹脂製フィルムより優れたフィルムはあるが、それらは
樹脂自体が高価であるか、或いはインフレーション成形
ができない為に、フィルム化したものは一層高価なもの
になる。
又、製袋にヒートシール性を付与するため、他のフィル
ムと積層して使用されており、生産性が悪く、又積層部
の剥離等の問題点がある。これに対し、本発明に使用す
るポリブチレンテレフタレート樹脂製フィルムは、イン
フレーション成形により得ることが可能であるため、更
に単層で優れた特性を持つため、より生産性に優れた経
済的な食品包装袋が得られる。
〔発明の効果〕
上記の如く本発明のポリブチレンテレフタレート樹脂製
フィルムを用いた食品包装袋は、保香性に優れ、ポリエ
チレン樹脂やポリプロピレン樹脂製のフィルムの様に特
有の臭いもなく、又無味である。食品包装材として特に
重要である臭いが食品に移ることはなく、食品の香りを
損なわない。しかも、本発明に使用するポリブチレンテ
レフタレート樹脂製フィルムは、インフレーション成形
により得ることが可能であり、ヒートシールも可能であ
る。更に単層で優れた特性を持つため、より生産性に優
れた経済的な食品包装袋が得られる。
〔実　施　例〕
以下実施例により本発明を更に詳しく説明するが、本発
明はこれらに限定されるものではない。
実施例１ 固有粘度１，４のポリブチレンテレフタレート樹脂（融
点２２８℃）を使用し、下記の条件でインフレーション
成形法によりフィルムを調製した。即ち、５Ｑｎｏｙ＋
押出成形機によりグイリップ間隙１ｍｍ、樹脂温度２６
０〜２６５℃で管状フィルムを押し出した。これをブロ
ー比１．５、引張速度４０ｍ／ｍｉｎで引っ張って、厚
み３０μｍ、直径２０ｃｍの管状フィルムを得た。この
管状フィルムを長す２０Ｃｍに切断し、一方をインパル
スシーラーにてヒートシールして製袋した。この袋に市
販のお茶、コーヒー、固型カレーを封入し、口をインパ
ルスシーラーにて封じた。
この袋をガラス製のデシケータ−内に入れ、２３℃、５
０％ＲＨに空調された部屋に置き、適時デシケータ−を
開き内容物の香りが初めて確認されるまでの時間を調べ
ることにより、香りの透過の程度を調べたところ、表−
１に示す通りいずれも２０日間以上経っても香りが透過
しなかった。又、内容物の香りの変化もなく、包装材か
らの匂いの移行もなかった。
比較例１ メルトインデックスが０．４の低密度ポリエチレン樹脂
（ＬＤＰＥ）を使用し、同様な条件で厚み３０μｍ１直
径２０ｃｍの管状フィルムを得た。
この管状フィルムを長さ２０ｃｍに切断し、一方をイン
パルスシーラーにてヒートシールして製袋した。
この袋に実施例１と同様に市販のお茶、コーヒー、固型
カレーを封入し、口をインパルスシーラーにて封じた。
この袋を実施例１と同様の方法で香りの透過の程度を調
べたところ、表−１に示す通りいずれも１時間以内で香
りが透過してしまった。
表　−１

Claims (1)

  1. 【特許請求の範囲】 １　ポリブチレンテレフタレート樹脂からなるフィルム
    をヒートシールにより製袋してなる保香性の優れた食品
    包装袋。 ２　ポリブチレンテレフタレート樹脂からなるフィルム
    が単層フィルムである特許請求の範囲第１項記載の食品
    包装袋。 ３　ポリブチレンテレフタレート樹脂が固有粘度１．０
    以上のものである特許請求の範囲第１項又は第２項記載
    の食品包装袋。 ４　ポリブチレンテレフタレート樹脂からなるフィルム
    がインフレーション法により成形されたフィルムである
    特許請求の範囲第１〜３項の何れか１項記載の食品包装
    袋。
JP62335858A 1987-12-28 1987-12-28 保香性の優れた食品包装袋 Expired - Fee Related JP2506878B2 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP62335858A JP2506878B2 (ja) 1987-12-28 1987-12-28 保香性の優れた食品包装袋
EP88312159A EP0323128B1 (en) 1987-12-28 1988-12-21 Food packaging bag having excellent aroma retention
DE3850953T DE3850953T2 (de) 1987-12-28 1988-12-21 Verpackungsbeutel für Nahrungsmittel mit sehr gutem Aromatrückhaltevermögen.
AT88312159T ATE109395T1 (de) 1987-12-28 1988-12-21 Verpackungsbeutel für nahrungsmittel mit sehr gutem aromatrückhaltevermögen.
KR1019880017433A KR940007127B1 (ko) 1987-12-28 1988-12-24 우수한 방향 보존성을 갖는 음식물 포장용 백

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62335858A JP2506878B2 (ja) 1987-12-28 1987-12-28 保香性の優れた食品包装袋

Publications (2)

Publication Number Publication Date
JPH01182255A true JPH01182255A (ja) 1989-07-20
JP2506878B2 JP2506878B2 (ja) 1996-06-12

Family

ID=18293173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62335858A Expired - Fee Related JP2506878B2 (ja) 1987-12-28 1987-12-28 保香性の優れた食品包装袋

Country Status (5)

Country Link
EP (1) EP0323128B1 (ja)
JP (1) JP2506878B2 (ja)
KR (1) KR940007127B1 (ja)
AT (1) ATE109395T1 (ja)
DE (1) DE3850953T2 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2507073B2 (ja) * 1988-10-05 1996-06-12 ポリプラスチックス株式会社 ポリブチレンテレフタレ―ト樹脂製袋
KR910002940A (ko) * 1989-07-31 1991-02-26 고니시 히고이찌 고온 충전용 포장재
BR0314124A (pt) * 2002-09-20 2005-07-12 Seiji Kagawa Método e aparelho para produção de pelìcula de tereftalato de polibutileno, e pelìcula de laminado de tereftalato de polibutileno com memória de forma
JP2004106492A (ja) * 2002-09-20 2004-04-08 Seiji Kagawa ポリブチレンテレフタレートフィルムの製造方法、並びに機能性ポリブチレンテレフタレートフィルム及び用途
CN102909897A (zh) * 2012-11-15 2013-02-06 南安市华辉包装有限公司 一种茶叶包装袋及其制作工艺
CN110789110A (zh) * 2019-10-15 2020-02-14 金华市伸华包装材料有限公司 低气味包装袋的生产工艺

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5070178A (ja) * 1973-10-22 1975-06-11
JPS6470360A (en) * 1987-09-02 1989-03-15 Polyplastics Co Heat resistant bag

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4462953A (en) * 1982-05-27 1984-07-31 The Goodyear Tire & Rubber Company Process for the manufacture of polyester film
GB8715532D0 (en) * 1987-07-02 1987-08-12 Keyes Fibre Co Ltd Packaging

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5070178A (ja) * 1973-10-22 1975-06-11
JPS6470360A (en) * 1987-09-02 1989-03-15 Polyplastics Co Heat resistant bag

Also Published As

Publication number Publication date
EP0323128A2 (en) 1989-07-05
ATE109395T1 (de) 1994-08-15
KR940007127B1 (ko) 1994-08-06
EP0323128A3 (en) 1991-01-16
EP0323128B1 (en) 1994-08-03
KR890010049A (ko) 1989-08-05
JP2506878B2 (ja) 1996-06-12
DE3850953D1 (de) 1994-09-08
DE3850953T2 (de) 1995-01-12

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