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WO1997009372A1 - Films de polystyrene minces contenant du polystyrene recycle apres consommation - Google Patents

Films de polystyrene minces contenant du polystyrene recycle apres consommation Download PDF

Info

Publication number
WO1997009372A1
WO1997009372A1 PCT/US1996/013848 US9613848W WO9709372A1 WO 1997009372 A1 WO1997009372 A1 WO 1997009372A1 US 9613848 W US9613848 W US 9613848W WO 9709372 A1 WO9709372 A1 WO 9709372A1
Authority
WO
WIPO (PCT)
Prior art keywords
polystyrene
post
consumer recycled
percent
films
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.)
Ceased
Application number
PCT/US1996/013848
Other languages
English (en)
Inventor
Gail S. Nonnemacher
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.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
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 Dow Chemical Co filed Critical Dow Chemical Co
Priority to AU68629/96A priority Critical patent/AU703220B2/en
Priority to CA002230025A priority patent/CA2230025A1/fr
Priority to IL12336196A priority patent/IL123361A0/xx
Priority to JP9511269A priority patent/JP2000501122A/ja
Priority to EP96929095A priority patent/EP0863936A1/fr
Publication of WO1997009372A1 publication Critical patent/WO1997009372A1/fr
Priority to MXPA/A/1998/001632A priority patent/MXPA98001632A/xx
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/06—Polystyrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02—Homopolymers or copolymers of hydrocarbons
    • C08J2325/04—Homopolymers or copolymers of styrene
    • C08J2325/06—Polystyrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group

Definitions

  • This invention relates to thin, substantially clear, oriented polystyrene films containing post-consumer recycled
  • this invention relates to such i films that can be useful as window envelope films.
  • a window envelope is an envelope with one or more openings of any shape, usually rectangular, which allows examination of any information, typically a name and an address, printed on a
  • the opening or openings in the envelope are sealed or closed by a window patch composed of a substantially clear film, typically polystyrene. Patching is the process in which window envelope film is cut into patches of a desired length and width, and applied to the
  • Window envelope films are typically composed primarily of extruded polystyrene and, optionally, contain a small proportion of a rubber-modified polymer, such as high-impact polystyrene ("HIPS"), to add a cosmetically desirable haze or measure of 20 translucency to the film.
  • Window envelope film may be manufactured in biaxial or uniaxial orientations. Biaxial orientation is generally preferred because of the superior cutability of the film in the transverse or cross machine direction.
  • the present invention provides thin, substantially clear, oriented polystyrene films containing post-consumer recycled polystyrene and possessing physical properties substantially similar to that of polystyrene films not containing post- consumer recycled polystyrene.
  • Films of the present invention may comprise up to 100 percent post-consumer recycled polystyrene.
  • Films of the present invention are generally at least about 0.25 mils (6.35 microns), and preferably at least about 0.75 mils (19.05 microns) thick. Films of the present invention are generally not more than about 7 mils (177.8 microns), preferably not more than about 4 mils (101.6 microns), and more preferably not more than about 2.5 mils (63.5 microns) thick.
  • Films of the present invention are either uniaxially or biaxially oriented. Preferably, films of the present invention are biaxially oriented.
  • Films of the present invention generally are composed primarily of extruded polystyrene.
  • the films may contain small amounts of an antiflecking agent and an acid scavenger such as taught in U.S. Patent Nos. 5,009,953 and 5,190,814.
  • the films may also contain a small proportion of a hazing agent, such as high-impact polystyrene ("HIPS") for example, to add a cosmetically desirable haze or measure of translucency to the film.
  • HIPS high-impact polystyrene
  • a preferred HIPS useful as a hazing agent is STYRON 404 (available from The Dow Chemical Company) .
  • the extruded polystyrene useful in making films of the present invention may contain up to 100 percent by weight of post-consumer recycled polystyrene.
  • the post-consumer recycled polystyrene meets the definition of post-consumer materials given in ASTM D5033-90.
  • the extruded polystyrene useful in the present invention may also contain general purpose polystyrene.
  • the particular general purpose polystyrene is not especially critical.
  • one preferred general purpose polystyrene is STYRON 665 (available from The Dow Chemical Company) .
  • the extruded polystyrene useful in the present invention may also contain in-plant scrap from films of the present invention.
  • the extruded polystyrene is a blend of general purpose polystyrene, scrap from films of the present invention, and post-consumer recycled polystyrene.
  • the post-consumer recycled polystyrene useful in the present invention must be substantially free of particulates such as paper fibers, rubber bands, and crosslinked gels in order to prevent agglomerates or holes in the film upon orientation.
  • a Soxhlet extraction technique was used to test the amounts of particulates in various samples of post-consumer recycled polystyrene. This Soxhlet extraction technique used a 10 micron filtration process with toluene as the solvent. Using the Soxhlet extraction, each sample of post-consumer recycled polystyrene was weighed and then dissolved in toluene. The dissolved sample was filtered using the 10 micron filtration process and any nonsoluble solid particulates recovered by the filtration process was weighed.
  • post-consumer recycled polystyrene useful in the present invention should have less than about 0.1 percent by weight particulates as measured by this Soxhlet extraction technique.
  • the post-consumer recycled polystyrene will contain no detectable amount of particulates as measured via this Soxhlet extraction technique.
  • the post-consumer recycled polystyrene must also be substantially free of contamination with other types of polymers such as polypropylene and polyethylene in order to avoid melt incompatibility. Melt incompatibility can result in a mottled film surface.
  • the post-consumer recycled polystyrene materials would indicate only one glass transition temperature at about 100°C when analyzed via digital scanning calorimetry using the method cited in ASTM D-3418.
  • the post-consumer recycled polystyrene should be substantially clear in order to produce good optical clarity in the resulting film.
  • the post-consumer recycled polystyrene must be substantially free of inks, food oils, and other pigmented contaminants. Plaques made from post-consumer recycled polystyrene pressed on a platen press at 400°F (204.4°C) to a thickness of approximately 0.10 inches (0.254 cm) should have less than 20 percent haze as measured by ASTM D-1003.
  • the post-consumer recycled polystyrene useful in the present invention would be recycled from clear, injection molded or thermoformed polystyrene parts. More preferably, the recycled polystyrene materials would be sourced from compact disc jewel boxes, compact disc jewel box clear inserts, audio tape boxes, cookie trays, or berry boxes.
  • Calcium carbonate is an undesirable contaminant sometimes found in post-consumer recycled polystyrene. Sources of post- consumer recycled polystyrene containing less calcium carbonate are preferable for use in the present invention.
  • the upper limit of calcium carbonate acceptable in post-consumer recycled polystyrene used in the present invention is not precisely known, post-consumer recycled polystyrene having amounts of calcium carbonate as high as 575 ppm have been successfully incorporated into films of the present invention.
  • the amount of calcium carbonate acceptable may depend on the percent of post-consumer polystyrene used and the particular end-use of the film produced. This amount should be determinable without undue experimentation.
  • Films of the present invention can be made by any technique known in the art. More specifically, films of the present invention can be oriented by any technique known in the art. However, when processing resin containing post-consumer recycled polystyrene to manufacture films of the present invention, it may be necessary to make minor adjustments to the melt temperature in order to maintain the orientation levels one would get when similarly processing resin containing no post- consumer recycled polystyrene. These adjustments generally result in a decrease of up to about 10°C in melt temperature. The level of adjustment in melt temperature needed to maintain a given level of orientation may depend on the source and amount of post-consumer recycled polystyrene. However, this level of adjustment can be determined without undue experimentation.
  • PC-1000 Another source of post-consumer recycled polystyrene tested was PC-1000 (available from the National Polystyrene Recycling Company) .
  • PC-1000 is produced from food-service containers and serviceware (trays and plates) .
  • the Soxhlet extraction test showed that PC-1000 contained approximately 1.7 percent by weight of particulates.
  • CN-201 is a pre-compounded blend of 20 percent by weight polytetrafluoroethylene, 1 percent by weight calcium stearate, and 79 percent by weight STYRON 665.
  • PC-1000D The National Polystyrene Recycling Company produces another source of post-consumer recycled polystyrene: PC-1000D.
  • PC-1000D is recycled food-service waste from the Los Angeles school system. This source of post-consumer recycled polystyrene is lower in contaminants than PC-1000 due to tighter source controls. Analyzed lots of PC-1000D showed between 0.1 percent and 1.6 percent insolubles via Soxhlet extraction.
  • the control film contained 95 percent by weight of general purpose polystyrene (STYRON 665) and 5 percent by weight of high-impact polystyrene (STYRON 404) .
  • STYRON 665 general purpose polystyrene
  • STYRON 404 high-impact polystyrene
  • Each of the other four films had enough general purpose polystyrene displaced with post-consumer recycled polystyrene so that each of the other four films contained 25 percent by weight of post-consumer recycled polystyrene.
  • Comparative Samples #1 and #2 respectively contained 25 percent by weight of PC-1000 and PC-1000D.
  • Example #1 contained 25 percent by weight of PC-4000 (available from the National
  • Example #2 contained 25 percent by weight of PCR-100 (available from Plastic Recycling, Inc.) .
  • the source of the post-consumer recycled polystyrene in PC-1000 and PC-1000D has already been discussed.
  • the source of post-consumer recycled polystyrene in PC-4000 is recycled compact disc jewel boxes and thermoformed polystyrene cookie trays.
  • the source of post-consumer recycled polystyrene in PCR-100 is recycled compact disc jewel boxes. For both PC-4000 and PCR-100 the amount of particulates present as measured by the Soxhlet extraction test was too small to be detectable.
  • Films of the present invention have been successfully used as window envelope films.
  • One such window envelope film contained 49 percent by weight of STYRON 665, 35 percent by weight PCR-100, 5 percent by weight STYRON 404, and 1% by weight CN-201.
  • the film had a thickness of 1.2 mils (30.48 microns) .
  • This film was successfully tested on an F.L. Smithe High Speed Patcher at 800 patches per minute and 7 inches (17.78 cm) Hg vacuum for 4000 feet.
  • Another window envelope film successfully tested contained 35 percent by weight PCR-100, 34 percent by weight STYRON 665, 15 percent by weight in-plant recycled film, 15 percent STYRON 404, 0.8 percent calcium stearate, and 0.2 percent polytetrafluoroethylene (MP1100 available from DuPont) . This film had a thickness of 1.2 mils (30.48 microns) .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Laminated Bodies (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Films de polystyrène orientés, minces, sensiblement transparents, contenant du polystyrène recyclé après consommation, et possédant des propriétés physiques sensiblement similaires à celles des films de polystyrène ne contenant pas de polystyrène recyclé après consommation. Les films conformes à l'invention peuvent comporter jusqu'à 100 % de polystyrène recyclé et être utilisés pour les enveloppes à fenêtre.
PCT/US1996/013848 1995-09-01 1996-08-30 Films de polystyrene minces contenant du polystyrene recycle apres consommation Ceased WO1997009372A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU68629/96A AU703220B2 (en) 1995-09-01 1996-08-30 Thin polystyrene films containing post-consumer recycled polystyrene
CA002230025A CA2230025A1 (fr) 1995-09-01 1996-08-30 Films de polystyrene minces contenant du polystyrene recycle apres consommation
IL12336196A IL123361A0 (en) 1995-09-01 1996-08-30 Thin polystyrene films containing post-consumer recylced polystyrene
JP9511269A JP2000501122A (ja) 1995-09-01 1996-08-30 再生一般廃ポリスチレンを含有する薄いポリスチレンフィルム
EP96929095A EP0863936A1 (fr) 1995-09-01 1996-08-30 Films de polystyrene minces contenant du polystyrene recycle apres consommation
MXPA/A/1998/001632A MXPA98001632A (en) 1995-09-01 1998-02-27 Straight polystyrene films containing recirculated polystyrene post-consumi

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US314795P 1995-09-01 1995-09-01
US60/003,147 1995-09-01

Publications (1)

Publication Number Publication Date
WO1997009372A1 true WO1997009372A1 (fr) 1997-03-13

Family

ID=21704404

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/013848 Ceased WO1997009372A1 (fr) 1995-09-01 1996-08-30 Films de polystyrene minces contenant du polystyrene recycle apres consommation

Country Status (8)

Country Link
EP (1) EP0863936A1 (fr)
JP (1) JP2000501122A (fr)
KR (1) KR19990044207A (fr)
CN (1) CN1198172A (fr)
AU (1) AU703220B2 (fr)
CA (1) CA2230025A1 (fr)
IL (1) IL123361A0 (fr)
WO (1) WO1997009372A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002062876A3 (fr) * 2001-02-02 2003-06-12 Dow Global Technologies Inc Films a faible brillant et a orientation biaxiale contenant des polymeres aromatiques vinyle et des particules de caoutchouc sensiblement non spheriques
WO2002022733A3 (fr) * 2000-09-15 2003-07-10 Dow Global Technologies Inc Compositions de polymeres styreniques presentant une clarte amelioree
DE102006056780A1 (de) * 2006-12-01 2008-06-05 Schleicher, Franz, Dr. Zwischenlagenfolie
EP2354168A1 (fr) 2010-02-03 2011-08-10 Total Petrochemicals Research Feluy Compositions à base de styrène réalisées avec une partie mineure de polymère de styrène recyclé dépourvu de métal
US8445552B2 (en) 2010-12-01 2013-05-21 The Diller Corporation Solid surface sheets containing post-consumer recycled materials and methods of making same
EP2513212B1 (fr) 2009-12-17 2021-04-21 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procédé de traitement de déchets contenant des matières plastiques

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114773665B (zh) 2014-10-03 2024-11-29 波利斯太沃特公司 回收聚苯乙烯废料的加工方法
WO2019095078A1 (fr) 2017-11-20 2019-05-23 Polystyvert Inc. Procédés de recyclage de déchets de polystyrène
US11407877B2 (en) * 2018-10-26 2022-08-09 Polystvert Inc. Processes for recycling polystyrene waste and/or polystyrene copolymer waste
CN111844829A (zh) * 2020-07-28 2020-10-30 昆山红苹果塑胶新材料有限公司 一种黑色遮光膜的制作方法
CN113698682A (zh) * 2021-05-28 2021-11-26 宁波讯强电子科技有限公司 再生ps塑料薄膜、声磁防盗标签、标签外壳及其制备方法
WO2022247061A1 (fr) * 2021-05-28 2022-12-01 宁波讯强电子科技有限公司 Film plastique de ps recyclé, étiquette antivol acousto-magnétique, logement d'étiquette antivol acousto-magnétique et procédés de préparation associés
EP4430111A4 (fr) 2021-11-11 2025-05-07 Polystyvert Inc. Procédés de recyclage d'un matériau de polystyrène comprenant des contaminants bromés

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0353513A1 (fr) * 1988-07-18 1990-02-07 The Dow Chemical Company Film antipoussière pour enveloppe à fenêtre utilisant un agent particulaire antistatique
EP0711797A1 (fr) * 1994-11-04 1996-05-15 Basf Aktiengesellschaft Polymère de styrène expansible comprenant du matérial recyclé

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0353513A1 (fr) * 1988-07-18 1990-02-07 The Dow Chemical Company Film antipoussière pour enveloppe à fenêtre utilisant un agent particulaire antistatique
EP0711797A1 (fr) * 1994-11-04 1996-05-15 Basf Aktiengesellschaft Polymère de styrène expansible comprenant du matérial recyclé

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HARVEY C. TUNG ET AL,: "Film For Producing Recyclable Polystyrene-based Trash Bags", RESEARCH DISCLOSURE, vol. 431, June 1993 (1993-06-01) *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002022733A3 (fr) * 2000-09-15 2003-07-10 Dow Global Technologies Inc Compositions de polymeres styreniques presentant une clarte amelioree
WO2002062876A3 (fr) * 2001-02-02 2003-06-12 Dow Global Technologies Inc Films a faible brillant et a orientation biaxiale contenant des polymeres aromatiques vinyle et des particules de caoutchouc sensiblement non spheriques
US6579946B2 (en) 2001-02-02 2003-06-17 Dow Global Technologies Inc. Low-gloss biaxially oriented films comprising vinyl aromatic polymers and substantially non-spherical rubber particles
KR100787689B1 (ko) 2001-02-02 2007-12-21 다우 글로벌 테크놀로지스 인크. 비닐 방향족 중합체 및 실질적으로 비구형인 고무 입자를 포함하는 이축 배향된 저광택 필름
DE102006056780A1 (de) * 2006-12-01 2008-06-05 Schleicher, Franz, Dr. Zwischenlagenfolie
EP2513212B1 (fr) 2009-12-17 2021-04-21 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procédé de traitement de déchets contenant des matières plastiques
EP2354168A1 (fr) 2010-02-03 2011-08-10 Total Petrochemicals Research Feluy Compositions à base de styrène réalisées avec une partie mineure de polymère de styrène recyclé dépourvu de métal
US8445552B2 (en) 2010-12-01 2013-05-21 The Diller Corporation Solid surface sheets containing post-consumer recycled materials and methods of making same
US8703833B2 (en) 2010-12-01 2014-04-22 The Diller Corporation Solid surface sheets containing post-consumer recycled materials and methods of making same

Also Published As

Publication number Publication date
AU6862996A (en) 1997-03-27
AU703220B2 (en) 1999-03-18
EP0863936A1 (fr) 1998-09-16
CN1198172A (zh) 1998-11-04
IL123361A0 (en) 1998-09-24
CA2230025A1 (fr) 1997-03-13
MX9801632A (es) 1998-08-30
KR19990044207A (ko) 1999-06-25
JP2000501122A (ja) 2000-02-02

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