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WO2000061677A1 - Procede et composition d'emballage sous film - Google Patents

Procede et composition d'emballage sous film Download PDF

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Publication number
WO2000061677A1
WO2000061677A1 PCT/US2000/008298 US0008298W WO0061677A1 WO 2000061677 A1 WO2000061677 A1 WO 2000061677A1 US 0008298 W US0008298 W US 0008298W WO 0061677 A1 WO0061677 A1 WO 0061677A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
wrap
density polyethylene
low density
polybutene
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/US2000/008298
Other languages
English (en)
Inventor
Cheol Yong Cha
Young Bae Park
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.)
3M Innovative Properties Co
Original Assignee
3M Innovative Properties 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 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Priority to AU41803/00A priority Critical patent/AU4180300A/en
Publication of WO2000061677A1 publication Critical patent/WO2000061677A1/fr
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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms
    • C08L23/0815—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms with aliphatic 1-olefins containing one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/16—Ethene-propene or ethene-propene-diene copolymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency

Definitions

  • Film-wrap materials suitable for packaging fresh or processed foods, are very thin with a thickness range of from 8 ⁇ m to 20 ⁇ m (0.08-0.02mm).
  • film-wrap should exhibit the following properties: Protection of Packaged Food
  • Film wrap with these properties represents a suitable material for packaging food.
  • Materials used for conventional film-wrap include polyvinyl chloride (PVC), polyvinyhdene chloride, polybutadiene, ethylvinylacetate (EVA), low density polyethylene (LD-PE), etc.
  • Low cost film-wrap for domestic use include those made from LD-PE, PVC, polyvinyhdene chloride and polybutadiene.
  • Polyvinyl chloride film-wrap is commonly used for commercial applications.
  • Film-wrap made from PVC has good transparency, but such wrap is known to generate hydrogen chloride and chlorine gas at a high temperature. These gases and other PVC decomposition products, are harmful to humans and represent potential carcinogens. While film-wrap made from LD-PE is harmless to humans, it is not particularly convenient for use due to low strength and insufficient transparency. Korean Patent Publication No.
  • LLD-PE linear low density polyethylene
  • B additive
  • a surfactant a corn oil, a stearic acid, polybutene and a petroleum resin
  • LLD-PE has good strength, is non-polluting and inexpensive, it is unsuitable for preparing film-wrap due to its poor transparency, inadequate cling, reduced anti-fogging and other properties.
  • publication KR 90-414 provides a LLD-PE wrap film with transparency by minimizing crystallization of LLD-PE using an appropriate amount of a petroleum resin. Further improvement in transparency occurs with addition of polybutene which normally acts to provide tackiness.
  • the method for preparing film-wrap from this material is expensive and subject to moisture condensation because of difficulties in uniformly distributing surfactant throughout the composition. This problem may be solved according to Korean Patent Publication No.
  • 97-65599 using an alternative film wrap made by mixing (A) a blend comprising LLD-PE, LD-PE, a polyolefin-based resin modifier and a processing aid in a proper ratio with (B) an additive comprising a surfactant, liquid oil (e.g., soybean oil, vegetable oil, sesame oil, or corn oil), polybutene and an antistatic agent in a proper ratio; adequately kneading the mixture in an extruder; and extruding a film using a T-die.
  • Film-wrap, prepared by this method needs no additive to improve transparency. It is highly flexible and impact-resistant. Since a large amount of the mixture can be extruded with a T-die, costs can be reduced.
  • film-wrap uniform dispersion of surfactant, using T-die extrusion, can prevent moisture condensation and improve the smoothness of the film.
  • the initial use of film-wrap was mainly for sealing and packaging food at room temperature or below. Recently, however, there has been increasing use of film- wrap in homes and restaurants to retain the moisture and flavor of food prepared by boiling or heating in a microwave oven. This application requires a film-wrap preferably possessing heat-resistance, along with the desirable properties mentioned previously. Although conventional film-wraps perform satisfactorily for simple sealing or packaging use, they often tear under the pressure of vapor generated during boiling of greasy food in high temperature ovens.
  • the expanded film-wrap does not recover to its original state, but tends to sag into contact with the warmed food as the water vapor pressure decreases. This raises concerns about potential for food contamination and leads to the need for previously undisclosed improvement in heat-resistance of a film- wrap packaging films.
  • the present invention overcomes the drawbacks discussed above by providing a film-wrap having heat-resistance, suitable shrinkage, flexibility and cling characteristics as well as the benefits associated with conventional film-wraps. More particularly, the present invention provides a safe, microwave-compatible, film- wrap which has desired strength, shrinkage, transparency, with suitable barrier properties including moisture and oil repellency.
  • the present invention satisfies the need for a film-wrap with superior heat- resistance and shrinkage, using ethylene propylene diene monomer (EPDM, an additive approved by the FDA) to provide film-wrap packaging with physical properties suitable for use in a microwave oven.
  • EPDM ethylene propylene diene monomer
  • the film- wrap composition comprises (A) 96-99 wt % of a mixture consisting of 35-40 wt % of a linear low density polyethylene (LLD-PE), 35-40 wt % of a low density polyethylene, 20-25 wt % of an ethylene butene polymer resin modifier and 1-4 wt % of a processing aid; (B) 1 -4 wt % of a mixture consisting of 10-20 wt % of an anti-dewing agent, 20-30 wt % of an antistatic agent, 10-20 wt % of a soybean oil and 45-55 wt % of polybutene; and (C) 3-5 wt % of EPDM based on the total weight of a blend of (A) with (B).
  • LLD-PE linear low density polyethylene
  • B 1 -4 wt % of a mixture consisting of 10-20 wt % of an anti-dewing agent, 20-30 wt % of an antistatic agent
  • a film-wrap particularly suitable for use in a microwave ovens, may be formed after mixing the components (A), (B) and (C), using extrusion equipment that includes a T-die.
  • the wrap film according to the invention comprises conventional components of a wrap film such as an ethylene butene polymer resin modifier for improving low temperature impact-resistance, a processing aid for improving surface roughness, a soybean oil for improving release characteristics, and polybutene for improved cling.
  • the film further comprises EPDM for superior heat-resistance and shrinkage. Accordingly, the film- wrap of the present invention has superior heat -resistance, as well as the advantages, previously discussed, of prior art film- wrap packaging films.
  • Films having a thickness of 11 ⁇ m were extruded through a T-die at a temperature of 270°C, using resin compositions comprising (A) 98.3 wt % of a mixture consisting of 37.5 wt % of LLD-PE, 37.5 wt % of LD-PE, 23 wt % of a resin modifier and 2 wt % of a processing aid; (B) 1.7 wt.
  • Example 4 of EPDM based on the total amount of a blend of components (A) and (B), were provided as comparative examples.
  • Bowls containing food were covered and sealed with wrap films of Examples 1-3 and Comparative Examples 1-4, and heated in a microwave oven for a determined period of time. The condition of the film-wrap was observed after the bowls were taken from the oven.
  • Conventional film- wrap of Comparative Example 1 sank, i.e. sagged towards the food, without recovering to the original state.
  • the films of Examples 1-3 of the present invention recovered substantially to their original state without touching the food.
  • the film- wrap of the present invention has superior heat-resistance when compared to the conventional films, thereby solving the problem of film rupture at high temperature. Even after being expanded by the pressure of water vapor, films of the present invention quickly recover to their original state by elastic shrinkage. Thus, they retain a relatively stretched condition when removed and allowed to cool after being heated in a microwave oven. Films according to the present invention also have superior flexibility and cling suitable for use in a microwave oven.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

L'invention concerne une composition d'emballage sous film, comprenant A) 96-99 % en poids d'un mélange constitué de 35-40 % en poids de polyéthylène linéaire à faible densité, 35-40 % en poids de polyéthylène à faible densité, 20-25 % en poids d'un modificateur de résine polymère d'éthylènebutène, et 1-4 % en poids d'un auxiliaire de traitement; B) 1-4 % en poids d'un mélange constitué de 10-20 % en poids d'un agent anti-mouillage, 20-30 % en poids d'un agent antistatique, 10-20 % en poids d'huile de soja, et 45-55 % en poids de polybutène; et C) 3-5 % en poids d'EPDM sur la base du poids total du mélange de A) et B). L'invention concerne également un procédé permettant de former un emballage sous film par extrusion d'une composition d'emballage sous film, obtenue par mélange des composants A), B) et C), par l'intermédiaire d'une matrice en T. Le film d'emballage résultant convient parfaitement pour être utilisé dans des fours à micro-ondes.
PCT/US2000/008298 1999-04-14 2000-03-28 Procede et composition d'emballage sous film Ceased WO2000061677A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU41803/00A AU4180300A (en) 1999-04-14 2000-03-28 Film wrap composition and method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1999-13098 1999-04-14
KR1019990013098A KR100324295B1 (ko) 1999-04-14 1999-04-14 랩 필름 제조용 조성물 및 그것으로 제조한 랩 필름

Publications (1)

Publication Number Publication Date
WO2000061677A1 true WO2000061677A1 (fr) 2000-10-19

Family

ID=19579899

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/008298 Ceased WO2000061677A1 (fr) 1999-04-14 2000-03-28 Procede et composition d'emballage sous film

Country Status (3)

Country Link
KR (1) KR100324295B1 (fr)
AU (1) AU4180300A (fr)
WO (1) WO2000061677A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2206063A1 (es) * 2002-10-31 2004-05-01 Hispanosuiza De Patentes, S.L. Film laminado con valvula aplicable para la coccion en microondas en bandeja o bolsa cerrada.
CN102321293A (zh) * 2011-07-07 2012-01-18 山东华群新材料科技有限公司 一种树脂基复合材料替代纸的制法
CN102675721A (zh) * 2012-05-15 2012-09-19 山东华群新材料科技有限公司 一种树脂基复合材料墙纸的制法
CN104130488A (zh) * 2014-08-15 2014-11-05 吴江市德佐日用化学品有限公司 微波专用耐热聚乙烯保鲜膜及其制备方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100718019B1 (ko) * 1999-09-27 2007-05-14 주식회사 크린ŽN 절단성이 강화된 무독성 랩 필름

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2038845A (en) * 1978-12-18 1980-07-30 Du Pont Canada Polyolefin Composition for Manufacture of Film Having Cling Properties
US4837262A (en) * 1986-02-22 1989-06-06 Jeon Byung S Non-toxic wrapping film for the packing of foodstuffs and the like

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2038845A (en) * 1978-12-18 1980-07-30 Du Pont Canada Polyolefin Composition for Manufacture of Film Having Cling Properties
US4837262A (en) * 1986-02-22 1989-06-06 Jeon Byung S Non-toxic wrapping film for the packing of foodstuffs and the like

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2206063A1 (es) * 2002-10-31 2004-05-01 Hispanosuiza De Patentes, S.L. Film laminado con valvula aplicable para la coccion en microondas en bandeja o bolsa cerrada.
WO2004039575A1 (fr) * 2002-10-31 2004-05-13 Hispanosuiza De Patentes, S.L. Film stratifie a valve s'appliquant a la cuisson au four micro-ondes dans une barquette ou dans un sac ferme
CN102321293A (zh) * 2011-07-07 2012-01-18 山东华群新材料科技有限公司 一种树脂基复合材料替代纸的制法
CN102675721A (zh) * 2012-05-15 2012-09-19 山东华群新材料科技有限公司 一种树脂基复合材料墙纸的制法
CN104130488A (zh) * 2014-08-15 2014-11-05 吴江市德佐日用化学品有限公司 微波专用耐热聚乙烯保鲜膜及其制备方法

Also Published As

Publication number Publication date
KR20000066184A (ko) 2000-11-15
AU4180300A (en) 2000-11-14
KR100324295B1 (ko) 2002-02-21

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