JP2639957B2 - Method for forming envelope pasting portion in paper container having excellent scent retention characteristics for filling material - Google Patents

Method for forming envelope pasting portion in paper container having excellent scent retention characteristics for filling material

Info

Publication number
JP2639957B2
JP2639957B2 JP63068874A JP6887488A JP2639957B2 JP 2639957 B2 JP2639957 B2 JP 2639957B2 JP 63068874 A JP63068874 A JP 63068874A JP 6887488 A JP6887488 A JP 6887488A JP 2639957 B2 JP2639957 B2 JP 2639957B2
Authority
JP
Japan
Prior art keywords
laminated sheet
surface layer
layer
paper container
laminated
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 - Lifetime
Application number
JP63068874A
Other languages
Japanese (ja)
Other versions
JPH01241434A (en
Inventor
裕孝 角田
一樹 山田
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.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing 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 Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to JP63068874A priority Critical patent/JP2639957B2/en
Publication of JPH01241434A publication Critical patent/JPH01241434A/en
Application granted granted Critical
Publication of JP2639957B2 publication Critical patent/JP2639957B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/22—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines with double walls; with walls incorporating air-chambers; with walls made of laminated material
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/135—Single hemmed joints, i.e. one of the parts to be joined being hemmed in the joint area
    • 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
    • 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
    • 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
    • B29C66/71—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
    • B29C66/712—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 the composition of one of the parts to be joined being different from the composition of the other part
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72327—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • 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
    • B29C66/731—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 intensive physical properties of the material of the parts to be joined
    • B29C66/7311—Thermal properties
    • B29C66/73117—Tg, i.e. glass transition temperature
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/106—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined using flames coming in contact with at least one 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/12—Paper, e.g. cardboard
    • B29K2711/123—Coated

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は内填物に対する保香特性に優れた性質を有す
る紙容器における封筒貼り部の形成方法に関するもの
で、金属箔を積層構成中に含む紙容器用の積層シートに
よって、内填物に対する保香特性に優れた性質を有する
紙容器を得る際の封筒貼り部を、確実に、且つ、極めて
効率良く形成し得る方法を提供するものである。Description: TECHNICAL FIELD The present invention relates to a method for forming an envelope sticking portion in a paper container having excellent fragrance retention properties for an infill, and a method for forming a metal foil in a laminated structure. The present invention provides a method for reliably and extremely efficiently forming an envelope sticking portion when obtaining a paper container having excellent properties of fragrance retention properties with respect to an infill by using a laminated sheet for a paper container. is there.

〔従来の技術〕[Conventional technology]

従来の紙容器は、紙容器を得る際に使用される成形用
素材である積層シートの有する熱溶着能によって接合部
が形成されているのが普通であり、一般的には、容器内
の内填物と接する容器内周面層となる層がポリオレフィ
ン系樹脂層で形成されている成形用素材における前記ポ
リオレフィン系樹脂層の有する熱溶着能によって接合部
が形成されている。In a conventional paper container, a joining portion is usually formed by the heat-sealing ability of a laminated sheet that is a molding material used when obtaining the paper container. The joining portion is formed by the heat welding ability of the polyolefin resin layer in the molding material in which the layer serving as the inner peripheral surface layer of the container in contact with the filling is formed of the polyolefin resin layer.

〔発明が解決しようとする課題〕[Problems to be solved by the invention]

ところで、前記容器内周面層がポリオレフィン系樹脂
層で構成されている容器は、該容器の成形用素材たる積
層シートを得る際のポリオレフィン系樹脂層の形成時や
該積層シートによる紙容器の成形時に、ポリオレフィン
系樹脂が熱分解を受けて脂肪族炭化水素等の揮発性成分
を生成することとなり、この揮発性成分が容器内に収容
されているオレンジジュース等の内填物内に移行する結
果、内填物に変味や異臭が発生するという弊害を有する
ばかりでなく、前記紙容器の内周面層をなすポリオレフ
ィン系樹脂層は、内填物中の着香成分を吸着し易かった
りあるいは透過し易かったりするため、容器内の内填物
の風味が変化して損なわれ易いという欠点をも有する。By the way, the container in which the container inner peripheral surface layer is composed of a polyolefin-based resin layer is used for forming a polyolefin-based resin layer at the time of obtaining a laminated sheet which is a molding material of the container, or forming a paper container with the laminated sheet. Occasionally, the polyolefin resin undergoes thermal decomposition to generate volatile components such as aliphatic hydrocarbons, and this volatile component migrates into the filling such as orange juice contained in the container. In addition to having the harmful effect of generating an unpleasant taste or an unpleasant odor in the filling, the polyolefin resin layer forming the inner peripheral surface layer of the paper container easily absorbs the flavoring component in the filling or There is also a drawback that the flavor of the filling in the container is easily changed and deteriorated because of easy permeation.

これに対して、本発明は、積層構成中に金属層を含ん
でいる紙容器用積層シートによって、内填物に対する保
香特性に優れた性質を有する紙容器を形成する際の封筒
貼り部を、極めて効率良く、かつ、確実に形成する方法
を提供するものである。On the other hand, the present invention relates to a paper container laminated sheet including a metal layer in a laminated structure, thereby forming an envelope sticking portion when forming a paper container having excellent fragrance retention properties with respect to an infill. It is intended to provide an extremely efficient and reliable forming method.

〔課題を解決するための手段〕[Means for solving the problem]

本発明の内填物に対する保香特性に優れた性質を有す
る紙容器における封筒貼り部の形成方法は、金属層を積
層構成中に含む包装材用基材と、ポリオレフィン系樹脂
による表面層と、40℃以上のガラス転移温度を有する低
結晶性線状飽和ポリエステル樹脂による裏面層とを具備
する紙容器用積層シートによって、容器内周面層が前記
積層シートによる裏面層たる低結晶性線状飽和ポリエス
テル樹脂層で構成される紙容器を得る際の封筒貼り部の
形成方法であって、前記積層シートの一方の側辺部を表
面層側に反転させた反転部を、前記積層シートの他方の
側辺部が乗り越えるようにして重畳させ、該重畳部を熱
溶着することによって前記封筒貼り部を形成するもので
ある。The method of forming an envelope pasting portion in a paper container having excellent properties of fragrance retention properties with respect to the filling material of the present invention includes a base material for a packaging material including a metal layer in a laminated structure, a surface layer of a polyolefin resin, With a laminated sheet for a paper container having a back layer made of a low-crystalline linear saturated polyester resin having a glass transition temperature of 40 ° C. or more, the inner circumferential surface layer of the container is a low-crystalline linear saturated layer serving as the back layer of the laminated sheet. A method for forming an envelope pasting portion when obtaining a paper container composed of a polyester resin layer, wherein a reversing portion obtained by reversing one side of the laminated sheet to the surface layer side is provided on the other side of the laminated sheet. The envelope pasting portion is formed by superimposing the side portions so as to get over them, and thermally welding the overlapping portion.

しかして、前記本発明方法の封筒貼り部の形成方法
は、前記積層シートの一方の側辺部を表面層側に反転さ
せた反転部を加熱，加圧することによって、前記反転部
の表面層同志を接着する第１工程と、前記封筒貼り予定
部分の表面層と裏面層との間の接着面となる前記紙容器
用積層シートの表面層と裏面層とのそれぞれに火炎処理
を施すことによって、前記表面層と裏面層とを熱溶融さ
せ、更に、前記両層が熱溶融状態にある間に、前記積層
シートの一方の側辺部と他方の側辺部とを重畳させ、前
記火炎処理が付されている面同志の接当部分を加圧する
ことによって該部分を接着する第２工程と、前記重畳部
分における前記積層シートの裏面層同志の接着面の接着
を、高周波誘導加熱による溶融を利用して行なう第３工
程とからなるものである。The method for forming an envelope-attached portion according to the method of the present invention includes heating and pressing a reversal portion obtained by reversing one side of the laminated sheet to the surface layer side, so that the surface layers of the reversal portion are connected to each other. A first step of bonding, and performing a flame treatment on each of the surface layer and the back layer of the laminated sheet for a paper container that becomes the bonding surface between the surface layer and the back layer of the portion where the envelope is to be attached, The front surface layer and the back surface layer are heat-fused, and further, while the two layers are in a heat-melted state, one side and the other side of the laminated sheet are overlapped, and the flame treatment is performed. The second step of applying pressure by pressing the contact portions of the attached surfaces and the bonding of the adhesive surfaces of the back layers of the laminated sheet in the overlapped portion using the fusion by high-frequency induction heating. And a third step of performing .

前記構成からなる本発明方法で利用する紙容器用積層
シートは、積層構成中に金属層を包む包装材用基材と、
前記紙容器用積層シートにおける表面層をなすポリオレ
フィン系樹脂層と、同じく、前記紙容器用積層シートに
おける裏面層をなす低結晶性線状飽和ポリエステル樹脂
層との積層シートであって、該積層シートにおける裏面
層をなす40℃以上のガラス転移温度を有する低結晶性線
状飽和ポリエステル樹脂層が、該樹脂層を構成している
線状飽和ポリエステル樹脂のガラス転移温度未満の温度
雰囲気中で優れた保香性能を発揮するものであり、一般
的に紙容器内の内填物が40℃未満に維持されるものであ
ることとの関係で、前記線状飽和ポリエステル樹脂層に
よる優れた保香性能が利用し得るものである。The laminated sheet for a paper container used in the method of the present invention having the above configuration, a packaging material base material that wraps the metal layer in the laminated configuration,
A laminated sheet of a polyolefin-based resin layer serving as a surface layer in the laminated sheet for a paper container and a low-crystalline linear saturated polyester resin layer serving as a back layer in the laminated sheet for a paper container. The low-crystalline linear saturated polyester resin layer having a glass transition temperature of 40 ° C. or more forming the back layer in the above is excellent in an atmosphere at a temperature lower than the glass transition temperature of the linear saturated polyester resin constituting the resin layer. It exhibits a perfume-retaining performance, and generally has an excellent perfume-retaining performance due to the linear saturated polyester resin layer in relation to the fact that the filling content in the paper container is maintained at less than 40 ° C. Are available.

尚、前記線状飽和ポリエステル樹脂層は、これが低結
晶性の樹脂の形成されているものであることから、例え
ば、オレンジジュース等の内填物の充填を熱充填で行な
う場合等の加熱を受けても、前記ポリエステル樹脂層の
熱溶着特性が損なわれるようなことがなく、内填物の充
填操作に続いて実施される紙容器用積層シートの裏面層
が関与する部分の封緘部の形成の際に、優れた熱接着強
度が得られる。Incidentally, since the linear saturated polyester resin layer is formed of a low-crystalline resin, the linear saturated polyester resin layer is heated, for example, when filling the filling such as orange juice by hot filling. However, the heat-sealing property of the polyester resin layer is not impaired, and the formation of the sealing portion of the portion related to the back layer of the laminated sheet for a paper container performed following the filling operation of the filling material is performed. In this case, excellent heat bonding strength is obtained.

前記紙容器用積層シートにおける裏面層をなすガラス
転移温度が40℃以上の飽和ポリエステル樹脂層は、例え
ば、エチレングリコール，プロピレングリコール,1,4−
ブタンジオール,1,4−シクロヘキサンジメタノール等の
アルコール成分と、アジピン酸，セバシン酸等の脂肪酸
ジカルボン酸や、テレフタル酸，イソフタル酸，ジフェ
ニルカルボン酸等の芳香族ジカルボン酸によるジカルボ
ン酸成分、具体的には、エチレングリコールとテレフタ
ル酸，エチレングリコールとイソフタル酸とテレフタル
酸,1,4−ジシクロヘキサンジメタノールとイソフタル酸
とテレフタル酸，プロピレングリコールとイソフタル酸
とテレフタル酸等の共縮合重合体を利用して形成し得る
が、酸成分中の脂肪族ジカルボン酸成分が10重量％以上
になる共縮合重合体の場合には、この共縮合重合体によ
る飽和ポリエステル樹脂層はその保香性能が低下する傾
向を有しているので好ましくない。The saturated polyester resin layer having a glass transition temperature of 40 ° C. or more as the back layer in the paper container laminated sheet is, for example, ethylene glycol, propylene glycol, 1,4-
Alcohol components such as butanediol and 1,4-cyclohexanedimethanol, and fatty acid dicarboxylic acids such as adipic acid and sebacic acid, and dicarboxylic acid components derived from aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid and diphenylcarboxylic acid. Copolymers such as ethylene glycol and terephthalic acid, ethylene glycol and isophthalic acid and terephthalic acid, 1,4-dicyclohexanedimethanol and isophthalic acid and terephthalic acid, and propylene glycol and isophthalic acid and terephthalic acid are used. However, in the case of a co-condensation polymer in which the aliphatic dicarboxylic acid component in the acid component is 10% by weight or more, the saturated polyester resin layer of the co-condensation polymer tends to have a reduced fragrance retention performance. Is not preferred.

また、前記40℃以上のガラス転移温度を有する低結晶
性線状飽和ポリエステル樹脂層は、これが厚さ５μｍ未
満になると樹脂層の安定性が悪く、ヒートシールによる
密封性が悪くなり、また、200μｍを越えるようになる
と、得られる紙容器用積層シートが固くなって、折り曲
げ加工特性が悪くなることから、通常は、厚さ５〜200
μｍの範囲内て形成されていることが好ましい。When the thickness of the low-crystalline linear saturated polyester resin layer having a glass transition temperature of 40 ° C. or more is less than 5 μm, the stability of the resin layer is poor, the sealing property by heat sealing is poor, and Is exceeded, the resulting laminated sheet for a paper container becomes hard, and the bending characteristics are deteriorated.
Preferably, it is formed within the range of μm.

本発明方法で利用する前記紙容器用積層シートにおけ
る表面層は、これらの積層シートによって成形される紙
容器に外部からの耐水性を付与するものであると同時
に、前述の各積層シートの裏面層との間に火炎シール法
による熱溶着性能をもたらすものであり、例えば、低密
度ポリエチレン、中密度ポリエチレン，高密度ポリエチ
レン，エチレン−酢酸ビニル共重合体，エチレン−アク
リル酸共重合体，エチレン−アクリル酸メチル共重合
体，エチレン−α・オルフィン共重合体，更にはポリプ
ロピレン等によって、厚さ３〜150μｍ程度に形成され
ているものである。The surface layer in the laminated sheet for paper containers used in the method of the present invention is to impart water resistance from the outside to the paper container formed by these laminated sheets, and at the same time, the back layer of each laminated sheet described above. And heat-sealing performance by a flame seal method. For example, low-density polyethylene, medium-density polyethylene, high-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-acryl It is formed to a thickness of about 3 to 150 [mu] m using an acid methyl copolymer, an ethylene- [alpha] -orphine copolymer, or polypropylene.

前記紙容器用積層シートは、前記40℃以上のガラス転
移温度を有する低結晶性線状飽和ポリエステル樹脂層か
らなる裏面層と、ポリオレフィン系樹脂による表面層と
が、積層構成中に金属層を含む包装材用基材に積層され
ているものであって、紙容器に成形されるに適した積層
シートとなり得る包装材用基材、例えば、アルミニュウ
ム箔，紙層，オレフィン系樹脂層，ポリエステル延伸フ
ィルム層等を利用した厚さ40〜1000μｍ程度の包装材用
基材が使用されるものである。The paper container laminate sheet, the back layer composed of the low crystalline linear saturated polyester resin layer having a glass transition temperature of 40 ° C. or more, and a surface layer of a polyolefin resin, a metal layer in the laminated structure A base material for a packaging material laminated on a base material for a packaging material and capable of forming a laminated sheet suitable for being formed into a paper container, such as an aluminum foil, a paper layer, an olefin-based resin layer, and a polyester stretched film. A base material for a packaging material having a thickness of about 40 to 1000 μm using a layer or the like is used.

なお、前述の40℃以上のガラス転移温度を有する低結
晶性線状飽和ポリエステル樹脂層からなる裏面層は、前
記包装材用基材に対して、例えば、接着性ポリオレフィ
ン系樹脂やイソシアネート系接着剤等の接着剤層を利用
して積層されるのが一般的である。The back layer made of the low-crystalline linear saturated polyester resin layer having a glass transition temperature of 40 ° C. or more is, for example, an adhesive polyolefin resin or an isocyanate adhesive, It is common to laminate using an adhesive layer such as.

また、前記紙容器用積層シートは、例えば、ブリック
タイプ、ゲーベルトップタイプ、更には円筒体等の紙容
器に成形されるものであり、主として胴貼り部分をなす
封筒貼り部が、積層シート端面が容器内周面に露出する
ことのない構造の接合部とされるもので、該接合部分に
おける積層シートの表面層同志の接着を、熱バー等によ
る熱接着で、また、積層シートの表面層の裏面層との間
の接着を、火炎処理による熱溶融接着で、更に、積層シ
ートの裏面層同志の接着を、高周波誘導加熱による熱溶
融接着で行なうものである。In addition, the laminated sheet for paper containers is, for example, a brick type, a goebel top type, and further molded into a paper container such as a cylindrical body, and an envelope pasting portion mainly forming a body pasting portion has a laminated sheet end face. A bonding portion having a structure that is not exposed on the inner peripheral surface of the container. The bonding between the surface layers of the laminated sheet at the bonding portion is performed by heat bonding using a heat bar or the like. Adhesion with the back layer is performed by hot-melt bonding by flame treatment, and bonding of the back layers of the laminated sheet is performed by hot-melt bonding by high-frequency induction heating.

前記火炎処理による熱溶融接着が行われる前記封筒貼
り予定部分の積層シートの表面層（ポリオレフィン系樹
脂層）と裏面層（低結晶性線状飽和ポリエステル樹脂
層）とに施される火炎処理は、通常10mm程度の細幅状か
らなるシール予定部分に対して施されるものであって、
処理面の温度が180〜250℃程度、ガス厚5mmAq、空気圧3
5〜60mmAq程度の火炎処理装置によって、処理速度20m/m
in.程度で実施されるもので、火炎処理された表面層す
なわちポリオレフィン系樹脂層は、該樹脂層の１部分が
溶融，酸化されて、前記樹脂層の表面張力が当該積層シ
ートの裏面層の表面張力と同一程度となる程度に火炎処
理されるのが好ましく、また、火炎処理された裏面層す
なわち40℃以上のガラス転移温度を有する低結晶性線状
飽和ポリエステル樹脂層は、前記火炎処理によって樹脂
層表面が荒らされ、微細な多数の凹凸群が前記樹脂層面
に生成されるように火炎処理されるのが好ましい。The flame treatment applied to the surface layer (polyolefin-based resin layer) and the back surface layer (low-crystalline linear saturated polyester resin layer) of the laminated sheet in the portion where the envelope is to be bonded, where the hot melt adhesion is performed by the flame treatment, It is usually applied to the part to be sealed, which has a narrow width of about 10 mm,
Processing surface temperature is about 180 ~ 250 ℃, gas thickness 5mmAq, air pressure 3
Processing speed 20m / m by flame treatment device of about 5-60mmAq
The flame-treated surface layer, that is, the polyolefin-based resin layer, is partially melted and oxidized so that the surface tension of the resin layer becomes lower than that of the back layer of the laminated sheet. It is preferable that the flame treatment is performed to the extent that the surface tension is the same as the surface tension, and the flame-treated back layer, that is, the low-crystalline linear saturated polyester resin layer having a glass transition temperature of 40 ° C. or more, is subjected to the flame treatment. The flame treatment is preferably performed so that the surface of the resin layer is roughened and a large number of fine irregularities are formed on the surface of the resin layer.

尚、前記火炎処理と、該火炎処理が施された面同志を
重畳，加圧する際の加圧処理との間のタイムラグが大き
くなりすぎると、加圧時の接合面の温度が低下し、得ら
れるシール強度が小さくなるので、前記タイムラグは0.
5秒以内に設定するのが好ましい。If the time lag between the flame treatment and the pressure treatment when the flame treated surfaces are superimposed and pressurized is too large, the temperature of the joint surface at the time of pressurization decreases, and The time lag is reduced to 0, because the required sealing strength is reduced.
It is preferable to set within 5 seconds.

また、前記積層シートの封筒貼り部における積層シー
トの裏面層同志の接合部の形成に際して利用される前述
の高周波誘導加熱は、先の火炎処理による熱溶融接着に
よって形成されている筒状体に対して施されるものであ
って、例えば、10〜1000KHzで、0.05〜30秒程度の照射
で十分であるが、前記照射を筒状体の内周面側から行な
った場合には、裏面層同志の強力な接着を得ることが困
難となるため、先の高周波誘導加熱は、火炎処理による
熱溶融接着によって形成されている筒状体の外周面側、
すなわち、ポリオレフィン系樹脂による表面層側から行
なうのが好ましい。In addition, the above-described high-frequency induction heating used in forming the joint between the back layers of the laminated sheet in the envelope attachment portion of the laminated sheet is performed on the tubular body formed by the hot-melt bonding by the flame treatment. For example, irradiation at 10 to 1000 KHz for about 0.05 to 30 seconds is sufficient, but when the irradiation is performed from the inner peripheral surface side of the cylindrical body, the back surface layers Since it is difficult to obtain strong adhesion, the high-frequency induction heating is performed on the outer peripheral surface side of the cylindrical body formed by hot-melt adhesion by flame treatment.
That is, it is preferable to carry out from the surface layer side of the polyolefin resin.

〔実 施 例〕〔Example〕

以下、本発明の内填物に対する保香特性に優れた性質
を有する紙容器における封筒貼り部の形成方法の具体的
な構成を実施例をもって説明する。Hereinafter, a specific configuration of the method for forming an envelope attachment portion in a paper container having excellent fragrance retention properties for an infill according to the present invention will be described with reference to examples.

実施例１ 第３図において、符号１で表示される包装材用基材、
すなわち、坪量400g/m2の耐酸紙／厚さ15μｍのアイオ
ノマー樹脂「ハイミラン1652:三井デュポンポリケミカ
ル（株）製」層／厚さ９μｍのアルミニュウム箔／厚さ
12μｍの二軸延伸ポリエチレンテレフタレートフィルム
層からなる積層構成の包装材用基材１に対して、該包装
材用基材１の耐酸紙面に、厚さ30μｍのポリオレフィン
系樹脂「ミラソン16P:三井石油化学工業（株）製」層か
らなる表面層２を形成し、また、前記包装材用基材１の
二軸延伸ポリエチレンテレフタレートフィルム層面に、
厚さ30μｍのエチレン−α−オレフィン共重合体樹脂
「ウルトゼックス2020L:三井石油化学工業（株）製」層
／厚さ10μｍの接着性ポリオレフィン樹脂「アドマーAT
469C:三井石油化学工業（株）製」層／厚さ20μｍの線
状飽和ポリエステル樹脂「PET G 6763:ガラス転移温度8
1℃，イーストマンコダック社製」層からなる三層共押
し出しフィルム３を、該フィルム３におけるポリエステ
ル樹脂層４が裏面層となるようにして積層することによ
って、本発明方法で使用する紙容器用積層シートの１実
施例品５を得た。Example 1 In FIG. 3, a packaging material base material indicated by reference numeral 1
That is, an acid-resistant paper having a basis weight of 400 g / m 2, a 15 μm-thick ionomer resin “Himilan 1652: manufactured by Mitsui Dupont Polychemicals Co., Ltd.” layer / a 9 μm-thick aluminum foil / thickness
In contrast to the packaging material substrate 1 having a laminated structure composed of a 12 μm biaxially stretched polyethylene terephthalate film layer, a 30 μm-thick polyolefin-based resin “Milason 16P: Mitsui Petrochemical Co., Ltd. A surface layer 2 composed of a layer manufactured by Kogyo Co., Ltd. is formed, and a biaxially stretched polyethylene terephthalate film layer surface of the packaging material substrate 1 is
30 μm thick ethylene-α-olefin copolymer resin “Ultzex 2020L: manufactured by Mitsui Petrochemical Industry Co., Ltd.” layer / adhesive polyolefin resin 10 μm thick “Admer AT”
469C: Mitsui Petrochemical Industries Co., Ltd. "layer / linear saturated polyester resin with a thickness of 20 μm" PET G 6763: glass transition temperature 8
1 ° C., manufactured by Eastman Kodak Co., Ltd. A three-layer co-extruded film 3 composed of layers is laminated such that the polyester resin layer 4 in the film 3 becomes the back surface layer, thereby forming a paper container used in the method of the present invention. Example product 5 of the laminated sheet was obtained.

次いで、前記積層シート５の側辺部を、表面層２同志
が接当するようにして幅約10mmに至って反転させ、該反
転部の上，下に、320℃のヒートシールバーを接当して
積層シート面が300℃になるまで2kg/cm2の圧力を付加
し、加熱，加圧することによって、前記表面層２同志を
接着させ、第２図に示されるような積層シート50、すな
わち、積層シート５の一方の側辺部が表面層２側に反転
され、該反転部の表面層２同志が熱溶着，接着された接
着部Ａを有する端面処理されている積層シート50を得
た。Next, the side portions of the laminated sheet 5 are turned over to a width of about 10 mm so that the surface layers 2 come into contact with each other, and a heat seal bar at 320 ° C. is placed above and below the inverted portion. By applying a pressure of 2 kg / cm 2 until the surface of the laminated sheet reaches 300 ° C., heating and pressurizing, the surface layers 2 are adhered to each other, and a laminated sheet 50 as shown in FIG. One side of the laminated sheet 5 was inverted to the surface layer 2 side, and an end-treated laminated sheet 50 having an adhesive portion A in which the surface layer 2 of the inverted portion was thermally welded and bonded was obtained.

次いで、前記端面処理されている積層シート50の他方
の側辺部における裏面層４の幅約10mmに至る部分と、前
記端面処理されている一方の側辺部の前記反転部を越え
た幅約10mmに至る部分の表面層２とを火炎処理に付し、
更に、前記火炎処理が付された表面層と裏面層とを接当
させることからなる側辺部同士の重畳部を形成し、引き
続いて、ゴムロールによる加圧を前記重畳部に施すこと
によって、第１図にて符号Ｂで表示される接着部を形成
し、前記積層シートにおける裏面層が内周面層で構成さ
れている筒状体を得た。Next, a portion of the other side of the laminated sheet 50 that has been subjected to the end face treatment, the portion reaching the width of about 10 mm of the back surface layer 4, and a width of the one side that has been subjected to the end face treatment that exceeds the reversal part has a width of about 10 mm. A flame treatment is applied to the surface layer 2 of a portion reaching 10 mm,
Further, by forming a superimposed portion between the side portions formed by contacting the front surface layer and the back surface layer subjected to the flame treatment, and subsequently applying pressure by a rubber roll to the superimposed portion, An adhesive portion indicated by reference numeral B in FIG. 1 was formed, and a cylindrical body in which the back surface layer of the laminated sheet was constituted by an inner peripheral surface layer was obtained.

なお、前記火炎処理は、積層シートの表面層に対して
は、ガス圧5mmAq,空気圧39mmAqの予備処理用第１バーナ
ーと、ガス圧5mmAq,空気圧47mmAqの第２バーナーとによ
って、また、積層シートの裏面層に対しては、ガス圧5m
mAq,空気圧40mmAqの予備処理用第１バーナーと、ガス圧
5mmAq,空気圧60mmAqの第２バーナーとによって、コンベ
アスピード200m/min.で実施したもので、火炎処理面の
加熱温度は250℃である。The flame treatment is performed on the surface layer of the laminated sheet by a first burner for pre-treatment at a gas pressure of 5 mmAq and an air pressure of 39 mmAq, and a second burner at a gas pressure of 5 mmAq and an air pressure of 47 mmAq. 5m gas pressure for back layer
1st burner for pretreatment of mAq, air pressure 40mmAq and gas pressure
The test was carried out at a conveyor speed of 200 m / min with a second burner of 5 mmAq and air pressure of 60 mmAq. The heating temperature of the flame treated surface was 250 ° C.

しかる後に、前述の筒状体において、該筒状体を構成
する積層シートの一方の側辺部に形成されている反転部
の裏面層４と他方の側辺部の裏面層４とが接当する幅約
10mmの重畳部に対して、第１図にて矢印で示される側か
ら、600KHz,2.0秒間の高周波誘導加熱を、該部分に加圧
を付しながら施すことにより、符号Ｃで表示される接着
部を形成し、前述の積層シート５における裏面層４が内
周面層とされている筒状体の封筒貼り部を形成した。Thereafter, in the above-described tubular body, the back surface layer 4 of the reversal portion formed on one side of the laminated sheet constituting the tubular body and the back layer 4 of the other side are brought into contact with each other. About width
By applying high-frequency induction heating at 600 KHz for 2.0 seconds while applying pressure to the 10 mm overlapped portion from the side indicated by the arrow in FIG. Then, an envelope attachment portion of a cylindrical body in which the back surface layer 4 of the laminated sheet 5 was an inner peripheral surface layer was formed.

得られた筒状体における前記封筒貼り部の接合面の剥
離を手指先で行なったところ、紙層内での断層破壊が生
じてしまい、積層シートの裏面層同志の間、及び表面層
と裏面層との間の界面を剥離することはできなかった。When the joint surface of the envelope-attached portion in the obtained tubular body was peeled off with a fingertip, a fault was broken in the paper layer, and between the back layers of the laminated sheet, and between the front layer and the back layer. The interface between the layers could not be stripped.

比較例１ 前記実施例１で使用した紙容器用積層シートと同一の
構成の積層シートによって、前記積層シートにおける表
面層と裏面層との間の接着部を、積層シートの側辺部同
士による幅約10mmの重畳部の上，下に、320℃のヒート
シールバーを接当し、積層シート面が300℃になるま
で、2kg/cm2の圧力を付加しながら加熱することによっ
て形成した。Comparative Example 1 With the laminated sheet having the same configuration as the laminated sheet for a paper container used in Example 1, the adhesive portion between the front layer and the back layer in the laminated sheet was formed by the width between the side portions of the laminated sheet. A heat seal bar at 320 ° C. was brought into contact with the upper and lower portions of the overlapped portion of about 10 mm, and was heated by applying a pressure of 2 kg / cm 2 until the surface of the laminated sheet reached 300 ° C.

比較例２ 前記実施例１で使用した紙容器用積層シートと同一構
成の積層シート２枚を利用し、両積層シートの側辺部に
おける裏面層のそれぞれを、幅10mmに亙って、前記実施
例１で使用したものと同じ条件による火炎処理に付し、
引き続いて、前記火炎処理面同志が接当するようにし
て、前記２枚の積層シートを重畳させ、次いで、前記重
畳部を加圧することによって、前記積層シートの裏面層
同志の接合部を形成することによって、２枚の積層シー
トを接合した。Comparative Example 2 Two laminated sheets having the same configuration as the laminated sheet for a paper container used in Example 1 were used, and each of the back layers at the side portions of both laminated sheets was spread over a width of 10 mm. Subjected to a flame treatment under the same conditions as used in Example 1,
Subsequently, the two laminated sheets are overlapped so that the flame-treated surfaces come into contact with each other, and then the overlapped portion is pressed to form a joint between the back layers of the laminated sheets. Thereby, two laminated sheets were joined.

比較例３ 前記実施例１で使用した紙容器用積層シートを同一の
構成の積層シートによって、該積層シートの側辺部同志
による幅10mmの重畳部を、前記積層シートの表面層と裏
面層とが接当するようにして形成し、該重畳部に前記実
施例１で使用したものと同一条件による高周波誘導加熱
を筒状体の外側表面側から付すことによって、内周面層
が裏面層で形成されている筒状体を得た。Comparative Example 3 The laminated sheet for the paper container used in Example 1 was formed by a laminated sheet having the same configuration as that of the laminated sheet for paper container. Are formed so as to be in contact with each other, and by applying high-frequency induction heating to the overlapping portion under the same conditions as those used in Example 1 from the outer surface side of the cylindrical body, the inner peripheral surface layer is a back surface layer. A formed tubular body was obtained.

前記比較例１〜３によって得られた各積層シートの接
着部の剥離を手指先で実施したところ、各接着部の接合
界面での剥離が容易に行なえた。When the adhesive portion of each laminated sheet obtained in Comparative Examples 1 to 3 was peeled off with a fingertip, the peeling at the bonding interface of each adhesive portion was easily performed.

〔発明の作用，効果〕[Action and Effect of the Invention]

本発明の内填物に対する保香特性に優れた性質を有す
る紙容器における封筒貼り部の形成方法は、金属層を積
層構成中に含む包装材用基材と、ポリオレフィン系樹脂
による表面層と、40℃以上のガラス転移温度を有する低
結晶性線状飽和ポリエステル樹脂による裏面層とを具備
する紙容器用積層シートによって、容器内周面層が前記
積層シートによる裏面層で構成される紙容器を得る際の
封筒貼り部の形成方法であって、前記積層シートの一方
の側辺部を表面層側に反転させた反転部を、前記積層シ
ートの他方の側辺部が乗り越えるようにして重畳させ、
該重畳部を熱溶着することによって前記紙容器における
封筒貼り部を形成するもので、前記積層シートの一方の
側辺部を表面層側に反転させた反転部を加熱，加圧する
ことによって、前記反転部における積層シートの表面層
同志を接着する第１工程と、前記封筒貼り予定部分の表
面層と裏面層との間の接着面となる前記積層シートの表
面層と裏面層とのそれぞれに火炎処理を施すことによっ
て、前記表面層と裏面層とを熱溶融させ、更に、前記両
層が熱溶融状態にある間に、前記積層シートの一方の側
辺部と他方の側辺部とを重畳し、前記火炎処理が付され
た面同志の接当部分を加圧することによって該部分を接
着する第２工程と、高周波誘導加熱を利用して、前記重
畳部分における前記積層シートの裏面層同志の接当面の
接着を行なう第３工程とからなるものである。The method of forming an envelope pasting portion in a paper container having excellent properties of fragrance retention properties with respect to the filling material of the present invention includes a base material for a packaging material including a metal layer in a laminated structure, a surface layer of a polyolefin resin, By a laminated sheet for a paper container having a back layer of a low-crystalline linear saturated polyester resin having a glass transition temperature of 40 ° C. or more, a paper container in which the container inner peripheral surface layer is constituted by the back layer of the laminated sheet. It is a method of forming an envelope pasting part at the time of obtaining, wherein an inverted part obtained by inverting one side of the laminated sheet to the surface layer side is overlapped so that the other side of the laminated sheet gets over. ,
The overlapping portion is heat-welded to form an envelope sticking portion in the paper container, and by heating and pressing a reversing portion obtained by reversing one side of the laminated sheet to the surface layer side, A first step of bonding the surface layers of the laminated sheet at the reversing portion, and a flame applied to each of the surface layer and the back surface layer of the laminated sheet which is the bonding surface between the surface layer and the back layer of the portion to be attached to the envelope. By performing the treatment, the front surface layer and the back surface layer are thermally melted, and further, while the both layers are in the heat fusion state, one side portion and the other side portion of the laminated sheet overlap with each other. Then, a second step of bonding the contact portions of the flame-treated surfaces by pressurizing the contact portions, and using a high-frequency induction heating, the back surface layers of the laminated sheet in the overlapped portion in the overlapping portion. No. 3 for bonding the contact surface It is made of the extent.

而して、前記本発明方法においては、金属層を積層構
成中に含む包装材用基材と、ポリオレフィン系樹脂によ
る表面層と、40℃以上のガラス転移温度を有する低結晶
性線状飽和ポリエステル樹脂による裏面層とを具備する
紙容器用積層シートによって、容器内周面層が前記積層
シートによる裏面層で構成される紙容器を得る際の封筒
貼り部を、前記積層シート中の金属層を容器内周面に露
出されることなく形成するものであるから、内填物に対
する保香特性と衛生性とに優れた性質を有する紙容器が
得られるものである。Thus, in the method of the present invention, a base material for a packaging material including a metal layer in a laminated structure, a surface layer of a polyolefin resin, and a low-crystalline linear saturated polyester having a glass transition temperature of 40 ° C. or higher. By a laminated sheet for a paper container having a back layer made of a resin, the envelope attaching portion when the inner peripheral surface layer of the container obtains a paper container composed of the back layer made of the laminated sheet, the metal layer in the laminated sheet. Since the paper container is formed without being exposed on the inner peripheral surface of the container, a paper container having excellent fragrance retention properties and hygiene properties for the filling material can be obtained.

また、前記本発明方法では、前述の封筒貼り部におけ
る積層シートの表面層と裏面層との間の接着に際しては
火炎処理を利用するものであるから、火炎処理されたポ
リオレフィン系樹脂層は、該樹脂層の１部分が溶融，酸
化されて、前記樹脂層の表面張力が、当該積層シートの
裏面層の表面張力と同一程度となっており、また、火炎
処理された裏面層即ち40℃以上のガラス転移温度を有す
る低結晶性線状飽和ポリエステル樹脂層は、該樹脂層表
面が荒らされ、微細な多数の凹凸群が前記樹脂層面に生
成されているので、火炎処理に続く加圧工程で、表面が
溶融状態にあるポリオレフィン系樹脂層が低結晶性線状
飽和ポリエステル樹脂層の表面の凹凸の凹部内に深く食
い込むようにして侵入し、両者の間の強固な接合が得ら
れるものである。Further, in the method of the present invention, since the flame treatment is used for bonding between the front surface layer and the back surface layer of the laminated sheet in the above-mentioned envelope attachment portion, the flame-treated polyolefin-based resin layer is formed by A portion of the resin layer is melted and oxidized, so that the surface tension of the resin layer is substantially the same as the surface tension of the back layer of the laminated sheet. The low-crystalline linear saturated polyester resin layer having a glass transition temperature, the surface of the resin layer is roughened, and a large number of fine irregularities are formed on the resin layer surface. The polyolefin-based resin layer whose surface is in a molten state penetrates deeply into the concaves and convexes on the surface of the low-crystalline linear saturated polyester resin layer so that a strong bond between the two can be obtained.

更に本発明方法では、前述の封筒貼り部における積層
シートの裏面層同志の接着に際しては、高周波誘導加熱
を利用するものであるから、40℃以上のガラス転移温度
を有する低結晶性線状飽和ポリエステル樹脂層同志の間
に強固な接合が得られるものである。Further, in the method of the present invention, since the high frequency induction heating is used for bonding the back layers of the laminated sheet in the above-mentioned envelope sticking portion, the low crystalline linear saturated polyester having a glass transition temperature of 40 ° C. or more is used. Strong bonding can be obtained between the resin layers.

従って、本発明方法では、内填物に対する保香特性と
衛生性とに優れた性質を有する紙容器における封筒貼り
部を、極めて効率の良い熱シール方法で、確実に形成し
得るものである。Therefore, according to the method of the present invention, it is possible to reliably form the envelope-attached portion of the paper container having excellent fragrance retention properties and hygiene properties with respect to the filling by an extremely efficient heat sealing method.

【図面の簡単な説明】[Brief description of the drawings]

第１図は、本発明方法によって形成された紙容器用積層
シートの封筒貼り部の模型断面図、第２図は、本発明の
封筒貼り部の形成方法の途中工程を示す模型断面図、第
３図は、本発明方法で使用する紙容器用積層シートの１
実施例品の模型断面図である。 1:金属層を積層構成中に含む包装材用基材、2:ポリオレ
フィン系樹脂による表面層、4:40℃以上のガラス転移温
度を有する低結晶性線状飽和ポリエステル樹脂による裏
面層、A:積層シート５の一方の側辺部を表面層２側に反
転させた反転部の表面層2,2同志の接着部、B:封筒貼り
部における積層シート５の裏面層４と表面層２との間の
接着部、C:封筒貼り部における積層シート５の裏面層4,
4同志の接着部。FIG. 1 is a model cross-sectional view of an envelope sticking part of a laminated sheet for a paper container formed by the method of the present invention. FIG. 2 is a model cross-sectional view showing an intermediate step of the method of forming an envelope sticking part of the present invention. FIG. 3 shows one of the laminated sheets for a paper container used in the method of the present invention.
It is a model sectional view of an example product. 1: a base material for a packaging material containing a metal layer in a laminated structure, 2: a surface layer made of a polyolefin resin, 4: a back layer made of a low-crystalline linear saturated polyester resin having a glass transition temperature of 40 ° C. or more, A: Adhesive portion of surface layers 2 and 2 of inverted portion where one side portion of laminated sheet 5 is inverted to surface layer 2 side, B: between back surface layer 4 and surface layer 2 of laminated sheet 5 in envelope attachment portion Adhesive part between, C: the back layer 4,
Adhesion of four comrades.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】紙容器用積層シートの一方の側辺部を表面
層側に反転させた反転部を、前記積層シートの他方の側
辺部が乗り越えるようにして重畳させ、該重畳部を熱溶
着することによって、容器内周面層が前記積層シートに
よる裏面層で構成される紙容器における封筒貼り部を形
成する方法において、金属層を積層構成中に含む包装材
用基材と、ポリオレフィン系樹脂による表面層と、40℃
以上のガラス転移温度を有する低結晶性線状飽和ポリエ
ステル樹脂による裏面層とを具備する紙容器用積層シー
トの一方の側辺部を表面層側に反転させた反転部を加
熱，加圧することによって、前記反転部の表面層同志を
接着し、次いで、前記封筒貼り予定部分の表面層と裏面
層との間の接着面となる前記紙容器用積層シートの表面
層と裏面層とのそれぞれに火炎処理を施すことによっ
て、前記表面層と裏面層とをそれぞれ熱溶融させ、更
に、前記両層が熱溶融状態にある間に前記積層シートの
一方の側辺部と他方の側辺部とを重畳した後、前記火炎
処理が付されている面同志の接当部分を加圧することに
よって該部分を接着し、しかる後に、高周波誘導加熱を
利用して、前記重畳部分における前記積層シートの裏面
層同志の接当面の接着を行なうことを特徴とする内填物
に対する保香特性に優れた性質を有する紙容器における
封筒貼り部の形成方法。1. A reversing portion obtained by reversing one side of a laminated sheet for a paper container to a surface layer side so that the other side of the laminated sheet gets over the superposed portion. In the method of forming an envelope attachment portion in a paper container in which the inner peripheral surface layer of the container is constituted by the back surface layer of the laminated sheet by welding, a base material for a packaging material including a metal layer in a laminated structure, and a polyolefin-based material. Surface layer of resin and 40 ℃
By heating and pressing a reversing part in which one side of the laminated sheet for a paper container having a back layer made of a low crystalline linear saturated polyester resin having the above glass transition temperature is reversed to the surface layer side. Then, the surface layers of the reversing part are adhered to each other, and then a flame is applied to each of the surface layer and the back surface layer of the laminated sheet for a paper container, which are the bonding surfaces between the surface layer and the back surface layer of the portion to be enveloped. By performing the treatment, the front surface layer and the back surface layer are each thermally melted, and further, one side portion and the other side portion of the laminated sheet are overlapped while both the layers are in the heat fusion state. After that, the contact portions of the surfaces to which the flame treatment is applied are bonded by pressurizing the contact portions, and then, by using high-frequency induction heating, the back surface layers of the laminated sheet in the overlapping portion are used. Adhesion of the contact surface Envelope attached part forming method in paper containers with superior properties fragrance preservation characteristics for Hama product among, wherein Nau.
JP63068874A 1988-03-23 1988-03-23 Method for forming envelope pasting portion in paper container having excellent scent retention characteristics for filling material Expired - Lifetime JP2639957B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63068874A JP2639957B2 (en) 1988-03-23 1988-03-23 Method for forming envelope pasting portion in paper container having excellent scent retention characteristics for filling material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63068874A JP2639957B2 (en) 1988-03-23 1988-03-23 Method for forming envelope pasting portion in paper container having excellent scent retention characteristics for filling material

Publications (2)

Publication Number Publication Date
JPH01241434A JPH01241434A (en) 1989-09-26
JP2639957B2 true JP2639957B2 (en) 1997-08-13

Family

ID=13386244

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63068874A Expired - Lifetime JP2639957B2 (en) 1988-03-23 1988-03-23 Method for forming envelope pasting portion in paper container having excellent scent retention characteristics for filling material

Country Status (1)

Country Link
JP (1) JP2639957B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102189145B1 (en) * 2020-07-06 2020-12-09 (주)신원인팩 Paper tray
KR102220694B1 (en) * 2020-12-04 2021-02-25 김범준 Packaging paper tray with eco-friendly coating

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0432917U (en) * 1990-07-16 1992-03-17
EP0529336B1 (en) * 1991-08-01 1996-01-24 Toppan Printing Co., Ltd. Method of thermal fusion
JP3394596B2 (en) * 1994-05-23 2003-04-07 日本テトラパック株式会社 Packaging container
KR200495723Y1 (en) * 2020-07-13 2022-08-03 (주) 신원인팩 Packing box with paper tray

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102189145B1 (en) * 2020-07-06 2020-12-09 (주)신원인팩 Paper tray
KR102220694B1 (en) * 2020-12-04 2021-02-25 김범준 Packaging paper tray with eco-friendly coating

Also Published As

Publication number Publication date
JPH01241434A (en) 1989-09-26

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