US20140001074A1 - Partially Crystalized Polyester Containers - Google Patents

Partially Crystalized Polyester Containers Download PDF

Info

Publication number
US20140001074A1
US20140001074A1 US14/005,016 US201214005016A US2014001074A1 US 20140001074 A1 US20140001074 A1 US 20140001074A1 US 201214005016 A US201214005016 A US 201214005016A US 2014001074 A1 US2014001074 A1 US 2014001074A1
Authority
US
United States
Prior art keywords
flange
container
polyester
container according
outer layer
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.)
Abandoned
Application number
US14/005,016
Other languages
English (en)
Inventor
Eugenio Longo
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of US20140001074A1 publication Critical patent/US20140001074A1/en
Abandoned legal-status Critical Current

Links

Images

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
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/002—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor characterised by the choice of 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
    • 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
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/04—Combined thermoforming and prestretching, e.g. biaxial stretching
    • 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
    • B29K2067/003—PET, i.e. poylethylene terephthalate
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/02—Open containers
    • B32B2439/06—Bags, sacks, sachets
    • 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
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2025—Multi-layered container, e.g. laminated, coated

Definitions

  • the present invention relates to packages for products, preferably food products, comprising in particular clear polyester containers having a crystallized portion of the flange with good sealability to a top web.
  • the resultant package has a neat, clear appearance which is more attractive to the final consumer.
  • a product support member i.e. a container or a tray
  • a cavity formed therein to accomodate the product and a flange around the perimeter of the member to be lidded, and the tray and the lid are not made by the same material causing recycling problems.
  • a generally known process to form a polyester tray includes extruding a polyester sheet in amorphous phase and subsequently crystallizing the whole tray by using a two stage mold, one hot for crystallization and the other cold for cooling down the article.
  • U.S. Pat. No. 4,374,800 relates to a PAT (Polyalkylene terephthalate) container including a body portion of at least 20% of crystallinity, a flange having a crystallinity lower than that of the body, adjoined to the body portion.
  • PAT Polyalkylene terephthalate
  • EP 0 605 081 relates to a food package, comprising a crystalline opaque or colored tray thermoformed from a nucleated PET sheet which remains rigid at elevated temperature, and a transparent cover in an amorphous state connected to the tray.
  • GB 2 205 063 relates to a PET container having different degrees of crystallization in different regions of the article to ensure best functionality, the different degree of crystallization of the tray is obtained using a special mold at different heating region without using nucleating agents.
  • US 2007/0082151 relates to a polyester container with a flange with a projecting portion, which exhibits low-temperature heat sealability.
  • object of the present invention is a clear multilayer polyester container comprising a base and upwardly extending side walls terminating in a continuous flange projecting from the side walls, said multilayer container comprising at least an inner layer of an amorphous polyester and a bulk outer layer comprising a polyester in admixture with a nucleating agent, said bulk outer layer being crystallized in at least one portion of said flange.
  • the term “inner layer” means the layer of the container that will be in contact with the content of the container or in alternative that part of the container that comes in contact with the forming plug of the mold; in FIG. 1 the “inner layer” is indicated by ( 1 . 1 ), the crystallized portion of the flange and the bulk outer layer are indicated by ( 1 . 2 ) and ( 1 . 3 ), respectively.
  • a container according to the present invention wherein said bulk outer layer is continuously crystallized all along the flange is particularly preferred.
  • the container is a double-layer or tri-layer container.
  • the inner layer is in the amorphous phase and the crystallized portion of the flange is in the other outer layer.
  • the inner layer is in the amorphous phase and the crystallized portion of the flange is preferably in the intermediate bulk layer.
  • the third outermost layer is preferably amorphous, being the nucleating agent preferably in the second layer.
  • the portion of the bulk outer layer of the flange is crystallized while the other parts of the same, i.e. of the side walls and of the bottom part of the container, remain in amorphous phase, i.e. with a crystallinity percentage lower than 10%.
  • the polymers used in the present invention are clear amorphous thermoplastic polymers that can be injection molded or sheet extruded.
  • polyesters such as, for example polyethylene terephthalate (PET), polylactic acid (PLA), polyethylene terephthalate—glycol (PETG).
  • the polymer used in the present invention is PET or PETG.
  • the inner layer remains amorphous during the crystallization of the flange so it can easily seal to a top lid using conventional sealing system, such as sealing bars.
  • the bulk outer layer(s) comprising the nucleating agent can be crystallized in the flange part of the container, for example by using the mold showed in FIG. 2 .
  • the nucleating agent used to promote crystallization is contained in the bulk outer layer of the container and preferably only the flange portion is crystallized.
  • nucleating agents which can be used in the container according to the present application and nucleating agent known in the art and commercially available, are:
  • the nucleating agent preferably used in the present invention is commercially available as Tna S471 by Sukano®.
  • the amount of nucleating agent generally depends on the type of polyester used. According to the conventional practice, the nucleating agent is generally used in an amount of from 2% to 5%, more preferably from 2.5% to 4%, even more preferably of 3%.
  • the nucleating agents have a particle size not higher than 10 microns.
  • the containers object of the present invention can be manufactured, for example, according to a process comprising the following steps:
  • the crystallization of the flange is therefore selectively guaranteed by the heating provided on the flange using, for instance, a mold similar to the mold showed in FIG. 2 .
  • the heating can be provided using a mold at different heating zones in order to crystallize only a portion of the flange or preferably the entire flange.
  • the percentage of crystallization in the bulk outer layer outside the flange remains lower than the percentage of crystallization of the flange or portions of the flange.
  • the crystallization of flange may take place, preferably, in a forming mold but also outside a mold.
  • the percentage of crystallization of the flange or portion of the flange is equal to or higher than about 10%, preferably higher than 12%, more preferably higher than 15%.
  • the crystallization of the flange takes place by heating the bulk outer layer generally at a temperature of from 270° C. to 300° C., preferably at 275° C. for a time comprised between 5 seconds and 10 seconds, preferably between 6 seconds and 8 seconds.
  • the heat transfer takes place by conduction, induction or convection systems.
  • the flange, after heating, can be cooled if needed.
  • the flange has a thickness ranging from 100 ⁇ m to 1000 ⁇ m, preferably from 200 ⁇ m to 700 ⁇ m, more preferably from 300 ⁇ m to 600 ⁇ m.
  • the container object of the present invention having the nucleating agent contained into the whole bulk outer layer, can also be crystallized if needed, in other portions but preferably only the flange is crystallized, thus providing the optical and mechanical properties needed i.e. more rigidity of the flange, transparency of the container and good sealability to the top lid.
  • the container of the present invention with the crystallized flange withstands the force imparted by the shrinking of lidding films and resists to deformations .
  • the present container is also suitable for tray lidding applications with non shrinkable films.
  • the container according to the present invention can be loaded with the product and then closed with a suitable top web by using a lidding machine which is characterized by a sealing bar operating at adequate temperature to get the seal.
  • the temperature of the sealing bar depends on the type of lidding film used and the sealing operation can be carried out both under clean and contaminated conditions.
  • the packages so obtained, further object of the present invention have a particularly good appearance.
  • said packages, having the container and the lid the same polymeric composition are really advantageous in the step of recycling. Furthermore it is possible to manufacture them by using recycled polyester.
  • a three-layer container (sample 1) in which the flange has a total thickness of 520 ⁇ m is formed using a mold as showed in FIG. 2 .
  • the inner layer is made of 100% PETG 6763 by Eastman Chemical and has a thickness of 100 ⁇ m.
  • the second layer is made of 97% PETG Ramapet 9921W by Indorama and 3% of nucleating agent Tna S471 by Sukano® and has a thickness of 320 ⁇ m.
  • the third layer is made of 97% PETG Ramapet 9921W by Indorama and 3% of nucleating agent Tna S471 by Sukano® and has a thickness of 100 ⁇ m.
  • Sample 1 is tested in order to evaluate the variability of crystallinity and is tested after flange conditioning at different temperatures for different times.
  • the areas of the flange were selected and submitted to the thermal analysis that showed 12% of crystallinity, by conditioning the sample at 275° C. for 6 seconds.
  • the crystallinity of the flange is higher than the crystallinity of the container which is 2.45%.
  • FIG. 1 represents a two layers container ( 1 . 0 ) according to the present invention.
  • the inner layer ( 1 . 1 ) is in the amorphous phase while the bulk outer layer has two portions at different degrees of crystallization: the area of the crystallized flange ( 1 . 2 ) and the remaining area of the polyester in the amorphous state ( 1 . 3 ).
  • FIG. 2 represents the forming process used to provide the container according to the present invention.
  • the polyester film ( 2 . 1 ) is inserted into the female mold which comprises the cooled part ( 2 . 3 ) and the heated part ( 2 . 2 ) where the crystallization of the flange occurs.
  • the polyester film ( 2 . 1 ) adheres to the female mold due to the vacuum applied ( 2 . 5 ), while the forming plug ( 2 . 4 ) pushes the polyester film ( 2 . 1 ) in the female mold, providing the final container.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
US14/005,016 2011-03-15 2012-03-12 Partially Crystalized Polyester Containers Abandoned US20140001074A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11158187.2 2011-03-15
EP11158187 2011-03-15
PCT/EP2012/054216 WO2012123391A1 (en) 2011-03-15 2012-03-12 Partially crystallized polyester containers

Publications (1)

Publication Number Publication Date
US20140001074A1 true US20140001074A1 (en) 2014-01-02

Family

ID=44650674

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/005,016 Abandoned US20140001074A1 (en) 2011-03-15 2012-03-12 Partially Crystalized Polyester Containers

Country Status (3)

Country Link
US (1) US20140001074A1 (de)
EP (1) EP2686153A1 (de)
WO (1) WO2012123391A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10992078B2 (en) 2018-01-29 2021-04-27 Bard Access Systems, Inc. Connection system for establishing an electrical connection through a drape and methods thereof
US11304772B2 (en) 2018-05-18 2022-04-19 Bard Access Systems, Inc. Connection systems and methods thereof for establishing an electrical connection through a drape
US12011255B2 (en) 2019-07-12 2024-06-18 Bard Access Systems, Inc. Catheter tracking and placement system including light emitting diode array
US12029498B2 (en) 2020-08-07 2024-07-09 Bard Access Systems, Inc. Optical-fiber connector modules including shape-sensing systems and methods thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105101883B (zh) * 2013-03-15 2018-02-09 Devicor医疗产业收购公司 活检装置
JP6165289B1 (ja) * 2016-03-24 2017-07-19 中本パックス株式会社 耐熱容器の製造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4803088A (en) * 1985-05-01 1989-02-07 House Food Industrial Company Limited Container packed with instant food for use in microwave oven
US5039001A (en) * 1990-06-18 1991-08-13 Kraft General Foods, Inc. Microwavable package and process
US8129007B2 (en) * 2006-02-16 2012-03-06 Cryovac, Inc. Coextruded heat-shrinkable polyester film

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE756074A (fr) 1969-09-11 1971-03-11 Hoechst Ag Matieres a mouler thermoplastiques a base de polyesters
DE3067110D1 (en) 1979-06-19 1984-04-26 Ici Plc Fast crystallising polyester compositions
US4374800A (en) 1981-03-18 1983-02-22 The Goodyear Tire & Rubber Company Method for making an article of partially crystalline organic resin
US4545848A (en) * 1982-11-08 1985-10-08 Mcdonnell Douglas Corporation HCT Crystal growth method
US4540038A (en) * 1984-06-05 1985-09-10 Westinghouse Electric Corp. Method for production of combustion turbine blade having a hybrid structure
GB2205063A (en) 1987-05-22 1988-11-30 Clarke R & Co Ltd Moulded plastics articles
US5356972A (en) 1992-07-29 1994-10-18 Istituto Guido Donegani S.P.A. Nucleating agents for poly(ethylene terephthalate)
US5318810A (en) 1992-12-30 1994-06-07 Welex Incorporated Food tray and method of making the same
US6429402B1 (en) * 1997-01-24 2002-08-06 The Regents Of The University Of California Controlled laser production of elongated articles from particulates
US6814905B1 (en) * 1999-12-02 2004-11-09 Associated Packaging Enterprises, Inc. Continuous process and apparatus for making thermoformed articles
WO2005042373A1 (ja) 2003-11-04 2005-05-12 Toyo Seikan Kaisha, Ltd. ポリエステル容器及びその製造方法、並びにポリエステル容器の密封方法
US20050131522A1 (en) * 2003-12-10 2005-06-16 Stinson Jonathan S. Medical devices and methods of making the same
EP2280801B1 (de) * 2008-05-29 2015-02-25 Siemens Aktiengesellschaft Verfahren zum schweissen von werkstücken aus hochwarmfesten superlegierungen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4803088A (en) * 1985-05-01 1989-02-07 House Food Industrial Company Limited Container packed with instant food for use in microwave oven
US5039001A (en) * 1990-06-18 1991-08-13 Kraft General Foods, Inc. Microwavable package and process
US8129007B2 (en) * 2006-02-16 2012-03-06 Cryovac, Inc. Coextruded heat-shrinkable polyester film

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10992078B2 (en) 2018-01-29 2021-04-27 Bard Access Systems, Inc. Connection system for establishing an electrical connection through a drape and methods thereof
US11936132B2 (en) 2018-01-29 2024-03-19 Bard Access Systems, Inc. Connection system for establishing an electrical connection through a drape and methods thereof
US11304772B2 (en) 2018-05-18 2022-04-19 Bard Access Systems, Inc. Connection systems and methods thereof for establishing an electrical connection through a drape
US12011255B2 (en) 2019-07-12 2024-06-18 Bard Access Systems, Inc. Catheter tracking and placement system including light emitting diode array
US12029498B2 (en) 2020-08-07 2024-07-09 Bard Access Systems, Inc. Optical-fiber connector modules including shape-sensing systems and methods thereof

Also Published As

Publication number Publication date
NZ615366A (en) 2015-04-24
WO2012123391A1 (en) 2012-09-20
EP2686153A1 (de) 2014-01-22

Similar Documents

Publication Publication Date Title
TWI466777B (zh) 具有熱成型聚酯膜蓋之雙耐熱食品包裝
US20140001074A1 (en) Partially Crystalized Polyester Containers
US6153276A (en) Heat-sealable lactic acid-based polymer laminates
JP5833534B2 (ja) ヒートシール可能な複合ポリエステルフィルム
US10118332B2 (en) Formed thermoplastic article having a peelable surface and smooth edges
KR100969848B1 (ko) 생분해성 내열성 경질수지 용기의 제조방법
US4469270A (en) Article of partially crystalline organic resin and method and apparatus for making same
US20200079064A1 (en) Heat-sealable polyester film for production of ready-meal trays, process for its production, and use of the film
US20220234803A1 (en) Formable films, laminate structures, and related methods
TW202132434A (zh) 雙軸配向聚酯膜及其製造方法
NZ615366B2 (en) Partially crystallized polyester containers
KR20190087827A (ko) 내열성이 우수한 일회용 투명 뚜껑
EP3998159A1 (de) Kompostierbare produktverpackung
US4374800A (en) Method for making an article of partially crystalline organic resin
US10066067B2 (en) Polyester sheet
WO2020096575A1 (en) Compostable material for packaging
DK3178883T3 (en) COMPOSITION FOR THE PREPARATION OF PARTICULARS ON THE BASIS OF PART CRYSTALLINE POLYETHYLENTRPHPHALATE
KR102120054B1 (ko) 고내열성 다층 구조의 폴리에스테르 시트 및 그로부터 제조되는 식품 용기
JP2023088586A (ja) 多層ポリエステルシート及びそれを用いた包装用容器
JP2006044729A (ja) 食品容器製造用シート、食品容器及びその製造方法
JP2001062890A (ja) 消臭積層シートの製法および消臭積層シートを成形した薄壁容器
JPS626972B2 (de)
JP3506643B2 (ja) 積層シートの製法および積層シートを成形した薄壁容器
JPH03189149A (ja) 多層シートおよび成型容器
JPH0463836A (ja) 耐熱性樹脂容器の製造方法

Legal Events

Date Code Title Description
STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION