Polyolefin film exhibiting heat resistivity, low hexane extractives and controlled modulus
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-027/32
C08L-023/08
출원번호
US-0475953
(1995-06-07)
발명자
/ 주소
deGroot Jacquelyn A.
Hazlitt Lonnie G.
Jain Pradeep
Karande Seema V.
Mergenhagen Laura K.
Moldovan Dan G.
Stewart Kenneth B.
Whiteman Nicole F.
출원인 / 주소
The Dow Chemical Company
인용정보
피인용 횟수 :
29인용 특허 :
277
초록▼
The subject invention provides a polymer mixture having high heat resistivity, low hexane extractive and controllably lower or higher modulus. The mixture is comprised of at least one first substantially linear ethylene polymer, Component (A), and at least one second ethylene polymer which is a homo
The subject invention provides a polymer mixture having high heat resistivity, low hexane extractive and controllably lower or higher modulus. The mixture is comprised of at least one first substantially linear ethylene polymer, Component (A), and at least one second ethylene polymer which is a homogeneously branched polymer, heterogeneously branched linear polymer or a non-short chain branched linear polymer. When fabricated into film, the mixture is characterized by a heat seal initiation temperature which is substantially lower than its Vicat softening point as well as a high ultimate hot tack strength. When fabricated as a molded article, the mixture is characterized by high microwave warp distortion while maintaining a lower modulus. The polymer mixture is particularly well-suited for use in multilayer film structures as a sealant layer for such applications as cook-in packages, hot-fill packages, and barrier shrink films. In molding applications, the mixture is well-suited as freezer-to-microwave food storage containers and lids which maintain good flexibility at low temperature to allow easy openability of such containers.
대표청구항▼
[ We claim:] [1.] A film comprising a polymer mixture, wherein the polymer mixture comprises(A) from 15 to 60 weight percent, based on the total weight of the mixture, of at least one first ethylene/cc-olefin polymer which is a substantially linear ethylene polymer having a density in the range of 0
[ We claim:] [1.] A film comprising a polymer mixture, wherein the polymer mixture comprises(A) from 15 to 60 weight percent, based on the total weight of the mixture, of at least one first ethylene/cc-olefin polymer which is a substantially linear ethylene polymer having a density in the range of 0.850 to 0.920 g/cc, wherein the substantially linear ethylene polymer is further characterized as havingi. a melt flow ratio, I.sub.10 /I.sub.2 .gtoreq.5.63,ii. a molecular weight distribution, M.sub.w /M.sub.n, as determined by gel permeation chromatography and defined by the equation: EQU (M.sub.w /M.sub.n).ltoreq.(I.sub.10 /I.sub.2)-4.63,iii. a gas extrusion rheology such that the critical shear rate at onset of surface melt fracture for the substantially linear ethylene polymer is at least 50 percent greater than the critical shear rate at the onset of surface melt fracture for a linear ethylene/.alpha.-olefin polymer, wherein the substantially linear ethylene polymer and the linear ethylene/.alpha.-olefin polymer comprise the same comonomer or comonomers, the linear ethylene polymer has an I.sub.2, M.sub.w /M.sub.n and density within ten percent of the substantially linear ethylene polymer and wherein the respective critical shear rates of the substantially linear ethylene polymer and the linear ethylene/.alpha.-olefin polymer are measured at 190.degree. C. and nitrogen pressures between 250 to 5500 psig using a gas extrusion rheometer equipped with a 20:1 L/D die having a 0.0754 mm diameter and an 180.degree. entrance angle,iv. a single differential scanning calorimetry, DSC, melting peak between -30.degree. and 150.degree. C.;v. a short chain branching distribution index equal to or greater than 50 percent; andvi. 0.01 to 3 long chain branches/1000 carbons, and(B) from 40 to 85 weight percent, based on the total weight of the mixture, of at least one second ethylene polymer which is a homogeneously branched ethylene/.alpha.-olefin polymer or heterogeneously branched linear ethylene/.alpha.-olefin polymer having a density between 0.890 and 0.942 g/cc; rein the polymer mixture is characterized as having a density of from 0.890 to 0.930 g/cc, a differential between the densities of the first ethylene/.alpha.-olefin polymer and the second ethylene polymer of at least 0.015 g/cc,with the proviso that where the density of the first ethylene polymer is less than 0.870 g/cc, the density of the second ethylene polymer is greater than 0.920 g/cc, a compositional hexane extractive level of less than 10 percent or less than 30 percent lower than the expected extractive amount for the mixture based on the total weight of the mixture and a Vicat softening point of at least 75.degree. C.; and wherein(a) a 0.038 mm thick coextruded sealant layer fabricated from the polymer mixture has a heat seal initiation temperature equal to or less than 100.degree. C. and an ultimate hot tack strength of at least 2.56 N/cm, and(b) the Vicat softening point of the polymer mixture is more than 6.degree. C. higher than the heat seal initiation temperature of the coextruded sealant layer; rein the I.sub.2 melt index is measured in accordance with A[ D-1238, Condition 190.degree. C./2.16 kilogram, the I.sub.10 melt index is measured in accordance with A][ D-1238, Condition 190.degree. C./10 kilogram, density is measured in accordance with A][ D-792 and hexane extractive is determined according the Food and Drug Administration test method set forth under 21 C.F.R. .sctn. 177.1520 (d)(3)(ii).]
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (277)
Tollar James E. (Midland MI), Annular heat exchanger.
Karol Frederick J. (Belle Mead NJ) Goeke George L. (Belle Mead NJ) Wagner Burkhard E. (Highland Park NJ) Fraser William A. (Princeton NJ) Jorgensen Robert J. (Dunbar WV) Friis Nils (Macungie PA), Article molded from ethylene hydrocarbon copolymer.
Lustig Stanley (Park Forest IL) Mack Nancy M. (Chicago IL) Schuetz Jeffrey M. (Woodridge IL) Vicik Stephen J. (Darien IL), Biaxially stretched, heat shrinkable VLDPE film.
Lundberg Robert D. (Somerville NJ) Phillips Robert R. (Spring Lake Heights NJ) Westerman Lowell (Baytown TX) Bock Jan (Piscataway NJ), Blends of sulfonated elastomers with crystalline polyolefins.
Calabro David C. (Somerset NJ) Cook Pamela J. (Jamesburg NJ) Kral Bohumil V. (Victoria AUX), Broad distribution, high molecular weight low density polyethylene and method of making thereof.
Goeke George L. (Belle Mead NJ) Wagner Burkhard E. (Highland Park NJ) Karol Frederick J. (Belle Mead NJ), Catalyst composition for copolymerizing ethylene.
Lo Frederick Y. (Yanbu Al Sinaiyah NJ SAX) Nowlin Thomas E. (Somerset NJ) Wu Margaret M. (Belle Mead NJ), Catalyst composition for polymerizing alpha-olefin polymers of relatively narrow molecular weight distribution.
Lo Frederick Y. (Yanbu Al Sinaiyah NJ SAX) Nowlin Thomas E. (Somerset NJ) Wu Margaret M. (Belle Mead NJ), Catalyst composition for polymerizing alpha-olefin polymers of relatively narrow molecular weight distribution.
Allen Louanne M. (Port Arthur TX) Hagerty Robert O. (Metuchen NJ) Mohring Richard O. (Sour Lake TX), Catalyst composition for polymerizing alpha-olefins.
Allen Luanne M. (Port Arthur TX) Hagerty Robert O. (Edison NJ) Mohring Richard O. (Bridgewater NJ), Catalyst composition for polymerizing alpha-olefins.
Allen Luanne M. (Port Arthur TX) Hagerty Robert O. (Edison NJ) Mohring Richard O. (Bridgewater NJ), Catalyst composition for polymerizing alpha-olefins.
Minami Syuji (Ohtake JPX) Ueda Takashi (Ohtake JPX) Kioka Mamoru (Ohtake JPX) Kashiwa Norio (Iwakuni JPX), Continuous process for production of olefin polymers or copolymers.
Cozewith Charles (Westfield NJ) Ju Shiaw (Edison NJ) Verstrate Gary W. (Matawan NJ), Copolymer compositions containing a narrow MWD component and process of making same.
Morterol Frederic (Lavera FRX) Vidal Jean-Louis (Martigues FRX), Copolymerization of ethylene and an alpha-olefin having six carbon atoms comprising hexene-1 or 4-methyl-pentene-1 in a.
Cancio Leopoldo V. (Cincinnati OH) Ryle Thomas R. (Burlington KY) Tomany Robert J. (Fairfield OH) Wu Pai-Chuan (Cincinnati OH), Disposable diapers, absorbent articles and thermoplastic sheet material having improving tape adhesion.
Lai Shih-Yaw (Sugar Land TX) Wilson John R. (Richwood TX) Knight George W. (Lake Jackson TX) Stevens James C. (Midland MI), Elastic substantially linear olefin polymers.
Lai Shih-Yaw (Sugar Land TX) Wilson John R. (Richwood TX) Knight George W. (Lake Jackson TX) Stevens James C. (Midland MI) Chum Pak-Wing S. (Lake Jackson TX), Elastic substantially linear olefin polymers.
Lai Shih-Yaw (Sugar Land TX) Wilson John R. (Richwood TX) Knight George W. (Lake Jackson TX) Stevens James C. (Midland MI), Elastic substantialy linear olefin polymers.
McDaniel Max P. (Bartlesville OK) Short James N. (Bartlesville OK), Ethylene polymer produced using a catalyst comprising a phosphate and with a bis-(cyclopentadienyl)chromium(II) compound.
Lillis Rupert Martin (Mount Chesney CA) Thomas Carmen Van (Beaconsfield CA), Film from a blend of high density polyethylene and a low density ethylene polymer.
Heitz William D. (Flagtown NJ) Ealer George E. (Whitehouse Station NJ) Cieloszyk Gary S. (Somerville NJ), Formulation for high clarity linear low density polyethylene film products.
Schinkel Ingo (Walsrode DEX) Bhner Jrgen (Walsrode DEX), Heat sealable multilayer films with low permeability to gas and their use as packaging material.
Weiner Milton L. (Rochester NY), Heat sealable packaging film comprising propylene polymer substrate and a surface layer blend of ethylene copolymer and.
Weiner Milton L. (Rochester NY), Heat sealable packaging film comprising propylene polymer substrate and a surface layer blend of ethylene copolymer and.
Weiner Milton L. (Rochester NY), Heat sealable packaging film comprising propylene polymer substrate and a surface layer blend of ethylene copolymer and.
Weiner Milton L. (Rochester NY), Heat sealable packaging film comprising propylene polymer substrate and olefin surface layer blend of polybutene-1 and a.
Mizutani Tomoji (Yatsushiro JPX) Fukushima Hitoshi (Yatsushiro JPX) Sakamoto Yoshihiro (Yatsushiro JPX), Heat shrinkable film and process for preparing the same.
Coleman ; III William M. (Lake Jackson TX) Schmidt Gregory F. (Midland MI) Campbell ; Jr. Richard E. (Midland MI) Delaney Mark S. (Midland MI), Heterogeneous organometallic catalysts containing a supported titanium compound and at least one other supported organom.
Kotani Terumitsu (Kawasaki JPX) Taka Toshio (Fujisawa JPX) Saito Yoshimasa (Kawasaki JPX), High density polyethylene type transparent film and process for production thereof.
Obijeski Todd J. (Houston TX) Lai Shih-Yaw (Sugar Land TX) Patel Rajen M. (Lake Jackson TX) Peng Lichih R. (Lake Jackson TX) Langohr Michael F. (Lake Jackson TX) Kelley David C. (Angleton TX) Eversdy, High drawdown extrusion process with greater resistance to draw resonance.
Lowery ; Jr. Kirby (Lake Jackson TX) Knight George W. (Lake Jackson TX) May ; Jr. James A. (Lake Jackson TX), High efficiency, high temperature catalyst for polymerizing olefins.
Benham Elizabeth (Bartlesville OK) McDaniel Max P. (Bartlesville OK) Bailey Fay W. (Bartlesville OK), High strength linear, low density polyethylene polymerization process.
Fraser William A. (Princeton NJ) Maraschin Norma J. (Somerset NJ) Karol Frederick J. (Belle Mead NJ) Makai Alexander J. (Charleston WV), High tear strength polymers.
Fraser William A. (Princeton NJ) Maraschin Norma J. (Somerset NJ) Karol Frederick J. (Belle Mead NJ) Makai Alexander J. (Charleston WV), High tear strength polymers.
Hazlitt Lonnie G. (Lake Jackson TX) Moldovan Daniel G. (Danbury TX), High temperature continuous viscometry coupled with analytic temperature rising elution fractionation for evaluating cry.
McKinney Osborne K. (Lake Jackson TX) Flores David P. (Lake Jackson TX) Eversdyk David A. (Angleton TX), Interpolymers of ethylene and unsaturated carboxylic acids.
Kurtz Stuart J. (Martinsville NJ) Apgar ; Jr. Howard G. (Bedminster NJ), Linear low density ethylene hydrocarbon copolymer containing composition for extrusion coating.
Treybig Duane S. (Lake Jackson TX) Harris Wendy D. (Angleton TX) Thomas Christopher J. (Lake Jackson TX), Linear low density ethylene interpolymers for injection molding.
Cancio Leopoldo V. (Cincinnati OH) Fitzsimmons James N. (Cincinnati OH) Mortellite Robert M. (Hamilton OH) Wu Pai-Chuan (Cincinnati OH), Linear low density polyethylene film and method of making.
Fujii Toshio (Kurashiki JPX) Kato Kazuhiro (Kurashiki JPX) Sakai Akihiko (Kurashiki JPX) Shinohara Yoshinao (Kurashiki JPX), Linear polyethylene film and process for producing the same.
Michel Klaus (Marl DEX) Gude Armin (Marl DEX), Manufacturing dimensionally stable shaped hollow sections from aliphatic polyamides and their applications.
Wooster Jeffrey J. (Lake Jackson TX) Geussens Theo L. V. (Meeuwen-Gruitrode BEX) Van Dun Jozef J. I. (Zandhoven BEX), Medium modulus molded material comprising substantially linear polyethlene and fabrication method.
Sheth Paresh J. (Sugarland TX) Thompson Francis M. (Whitehouse Station NJ), Metallized breathable films prepared from melt embossed polyolefin/filler precursor films.
Cook John E. (Westfield NJ) Hagerty Robert O. (Edison NJ) Jacob Frederick W. (Houston TX), Method and reactor system for rapid kill gas injection to gas phase polymerization reactors.
Baird ; Jr. William G. (Winchester MA) Holbrook Stanley E. (South Acton MA) Platt Jeremy A. (Cambridge MA), Method for preparing a film of vinylidene chloride polymer.
Cook, John E.; Hagerty, Robert O.; Jacob, Frederick W., Method for rapid kill gas injection to gas phase polymerization reactors during power failures.
Gunter Harvey R. (Bridge City TX) Stutzman Gary L. (Woodlands TX) Salerno Stephen G. (Lawrenceville NJ), Method for reducing shrinkage of injection molded linear low density polyethylene.
Shamshoum Edwar S. (Houston TX) Elder Michael J. (Friendswood TX) Reddy Baireddy R. (Baytown TX) Rauscher David J. (Webster TX), Method of making a homogeneous-heterogenous catalyst system for olefin polymerization.
Cancio Leopoldo V. (Cincinnati OH) Fitzsimmons James N. (Cincinnati OH) Mortellite Robert M. (Hamilton OH) Wu Pai-Chuan (Cincinnati OH), Method of making linear low density polyethylene film.
Machon Jean-Pierre (Bethune FRX) Le Brasseur Genevieve (Bully les Mines FRX) Decroix Jean-Claude (Arras FRX) Hert Marius (Aubigny en Artois FRX), Modified copolymers of ethylene and a
상세보기
Crapo Clark C. (Houston TX) Malpass Dennis B. (LaPorte TX), Modified methylaluminoxane.
Cozewith Charles (264 W. Dudley Ave. Westfield NJ 07090) Ju Shiaw (23 Independence Dr. Edison NJ 08820) Verstrate Gary W. (25 Balmoral Ave. Matawan NJ 07747), Molecular weight distribution modification in a tubular reactor.
Canich Jo Ann M. (Webster TX) Licciardi Gary F. (Humble TX), Mono-Cp heteroatom containing group IVB transition metal complexes with MAO: supported catalyst for olefin polymerizatio.
Ferguson Daniel J. (Spartanburg SC) Schirmer Henry G. (Spartanburg SC) Mueller Walter B. (Inman SC), Multi-layer packaging film and receptacles made therefrom.
Mueller Walter B. (Taylors SC) Schirmer Henry G. (Spartanburg SC) Schoenberg Julian H. (Greenville SC) Weinberg Alan S. (Greenville SC), Multi-layer polyester/polyolefin shrink film.
Lustig Stanley (Park Forest IL) Schuetz Jeffrey M. (Woodridge IL) Vicik Stephen J. (Darien IL), Multilayer film having improved heat sealing characteristics.
Crass Guenther (Taunusstein DEX) Bothe Lothar (Mainz-Gonsenheim DEX) Schloegl Gunter (Kelkheim DEX), Multilayer film suitable as a release sheet in the production of decorative laminate panels.
Chum Pak-Wing S. (Lake Jackson TX) Koch Kaelyn C. (Lake Jackson TX), Multilayer polyolefinic film structures having improved heat seal characteristics.
Cozewith Charles (Westfield NJ) Ju Shiaw (Edison NJ) Verstrate Gary W. (Matawan NJ), Nodular copolymers comprising narrow MWD alpha-olefin copolymers coupled by non-conjugated dienes.
Cozewith Charles (Westfield NJ) Ju Shiaw (Edison NJ) Verstrate Gary W. (Matawan NJ), Nodular copolymers formed of alpha-olefin copolymers coupled by non-conjugated dienes.
Chester Arthur W. (Cherry Hill NJ) Murray: James G. (East Brunswick NJ) Schwartz Albert B. (Philadelphia PA), Olefin polymerization with catalysts derived from chromium exchanged zeolites.
Davis Kent A. (Travelers Rest SC) Bekele Solomon (Taylors SC) Stockley Henry W. (Spartanburg SC), Peelable barrier film for vacuum skin packages and the like.
Thiersault Jean P. (Martigues FRX) Durand Daniel (Martigues FRX) Senez Alain (Callas-Cabris FRX), Polyethylene composition for extrusion, particularly for blow moulding.
Miles David L. (Neshanic NJ) Karol Frederick J. (Belle Mead NJ) Goeke George L. (Belle Mead NJ), Polymerization catalyst, process for preparing, and use for ethylene polymerization.
Lo Frederick Y. (Yanbu Al Sinaiyah NJ SAX) Nowlin Thomas E. (Somerset NJ) Wu Margaret M. (Belle Mead NJ), Preparation of alpha-olefin polymers of relatively narrow molecular weight distribution.
Deavenport Dennis L. (Seabrook TX) Hodges ; III. James T. (Alvin TX) Malpass Dennis B. (Peekskill NY) Tran Nam H. (Houston TX), Preparation of aluminoxanes.
Karol Frederick J. (Belle Mead NJ) Goeke George L. (Belle Mead NJ) Wagner Burkhard E. (Highland Park NJ) Fraser William A. (Princeton NJ) Jorgensen Robert J. (Dunbar WV) Friis Nils (Macungie PA), Preparation of ethylene copolymers in fluid bed reactor.
Noshay Allen (East Brunswick NJ) Karol Frederick J. (Belle Mead NJ) Jorgensen Robert J. (Dunbar WV), Preparation of low-density ethylene copolymers in fluid bed reactor.
Edwards David N. (Charleston WV) Jorgensen Robert J. (Belle Mead NJ) Lee Kiu H. (South Charleston WV) Marcinkowsky Arthur E. (Charleston WV), Preparation of very low molecular weight polyethylene in a fluidized bed.
Ewen John A. (Houston TX) Welborn ; Jr. Howard C. (Houston TX), Process and catalyst for producing polyethylene having a broad molecular weight distribution.
Ewen John A. (Houston TX) Welborn ; Jr. Howard C. (Houston TX), Process and catalyst for producing polyethylene having a broad molecular weight distribution.
Lustig Stanley (Park Forest IL) Mack Nancy M. (Chicago IL) Schuetz Jeffrey M. (Woodridge IL) Vicik Stephen J. (Darien IL), Process for making puncture resistant, heat-shrinkable films containing very low density polyethylene.
Allen Luanne M. (Port Arthur TX) Hagerty Robert O. (Edison NJ) Mohring Richard O. (Bridgewater NJ), Process for polymerizing alpha-olefins with trimethylaluminum-activated catalyst.
Candlin John P. (Aston GB2) Caunt Anthony D. (Welwyn Garden City GB2) Kelland John W. (Luton GB2) Law Peter L. (Great Shelford GB2), Process for polymerizing olefins with a spray-dried catalyst.
Yoshimura, Isao; Hata, Hideo; Kaneko, Takashi, Process for preparing cold drawn film from an ethylene-.alpha.-olefin copolymer and at least one of low-density polyethylene or ethylene copolymers and polypropylene, high density polyethylene or cry.
Oda Hidekuni (Iwakuni JPX) Murata Kazuhiko (Ohtake JPX) Kajiura Hirokazu (Ohtake JPX) Matsuda Akira (Ichihara JPX), Process for production of rubbery ethylene/1-butene/polyene copolymers.
Kurtz Stuart J. (Martinsville NJ) Roberts Ernest H. (Somerset NJ) Lucchesi Peter J. (Middlesex NJ), Process for reducing draw resonance in polymeric film.
Lucchesi Peter J. (Middlesex NJ) Kurtz Stuart J. (Martinsville NJ) Roberts Ernest H. (Somerset NJ), Process for reducing draw resonance in polymeric film.
Collomb-Ceccarini Joelle (Marseille FRX) Crouzet Pierre (Matrigues FRX), Process for the polymerization or copolymerization of alpha-olefins in a fluidized bed, in the presence of a Ziegler-Nat.
Wagner Burkhard E. (Highland Park NJ) Goeke George L. (Belle Mead NJ) Karol Frederick J. (Belle Mead NJ), Process for the preparation of high density ethylene polymers in fluid bed reactor.
Baxmann Fritz (Marl DT) Dietrich Johann (Marl DT) Dittmann Walter (Marl DT) Frese Albert (Marl DT), Process for the production of crystalline terpolymers of ethene, butene-1 and butene-2.
Isozaki Hideo (Yatsushiro JPX) Takahashi Masumi (Matsudo JPX) Hirata Makoto (Sencho JPX), Process of making stretchable, heat shrinkable polyethylene film.
Lustig Stanley (Park Forest IL) Mack Nancy M. (Chicago IL) Schuetz Jeffrey M. (Woodridge IL) Vicik Stephen J. (Darien IL), Puncture resistant, heat-shrinkable films containing very low density polyethylene.
Cook John E. (Westfield NJ) Hagerty Robert O. (Edison NJ) Jacob Frederick W. (Houston TX), Reactor system for rapid kill gas injection to gas phase polymerization reactors.
Dunski Neil (Creve Coeur MO) Buehler Henry J. (St. Louis MO), Stabilized linear low-density polyethylene containing ring-substituted N-acyl-para-aminophenol.
Edwards, Ray; Gillespie, Bruce Alexander; Farnham, Diane Hines, Blends containing linear low density polyethylene, high density polyethylene, and low density polyethylene particularly suitable for extrusion coating and films.
Oswald, Thomas; Chaudhary, Bharat I.; Weinhold, Jeffrey D., Blends of ethylenic polymers with improved modulus and melt strength and articles fabricated from these blends.
Sibtain, Fazle; Dobbin, Christopher John Brooke; Taylor, Kenneth Edward; Khakdaman, Hamidreza; Chisholm, P Scott, Ethylene interpolymers having improved color.
Degroot,Alexander W.; Stevens,James C.; Desjardins,Sylvie Y.; Weinhold,Jeffrey; Carnahan,Edmund M.; Gillespie,David; Vanderlende,Daniel D., High melt strength polymers and method of making same.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.