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WO1983000490A1 - Melanges de revetement par extrusion de polyethylene a deux composants - Google Patents

Melanges de revetement par extrusion de polyethylene a deux composants Download PDF

Info

Publication number
WO1983000490A1
WO1983000490A1 PCT/US1982/000916 US8200916W WO8300490A1 WO 1983000490 A1 WO1983000490 A1 WO 1983000490A1 US 8200916 W US8200916 W US 8200916W WO 8300490 A1 WO8300490 A1 WO 8300490A1
Authority
WO
WIPO (PCT)
Prior art keywords
density
blends
polyethylene
melt index
neck
Prior art date
Application number
PCT/US1982/000916
Other languages
English (en)
Inventor
Kodak Company Eastman
Ray Edwards
Original Assignee
Eastman Kodak 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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of WO1983000490A1 publication Critical patent/WO1983000490A1/fr
Priority to FI830791A priority Critical patent/FI830791L/fi

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D123/04—Homopolymers or copolymers of ethene
    • C09D123/06—Polyethene

Definitions

  • This invention relates to two-component polyethylene blends that are useful for extrusion 5 coating on various substrates.
  • neck-in connotes the narrowing down of the extruded film Q immediately upon leaving the extruder head, presumably due to internal forces in the film, and which causes a thickening of the film edges so that trimming thereof is required.
  • Poor neck-in properties or stability of a polymer or blend may ⁇ 5 result in as much as 15% waste or more in certain coating operations.
  • the maximum width and uniformity of the coating depend on good neck-in stability characteristics.
  • neck-in stability connotes the change 20 in neck-in per unit change in temperature of the film.
  • a poor neck-in stability means a large change of neck-in per small change in temperature. Such temperature variations result, for example, from the on and off cycling of the extruder and die heaters.
  • 5 Good neck-in stability is particularly desirable from the standpoint of maintaining a uniform coating thickness over a wide range of extrusion temperatures, as well as maintaining a constant coating width.
  • the pinhole problem is manifested in poor barrier properties, and the resistance of a polyethylene coating to pinholing appears to be directly related to its thermal stability as reflected, for example, in neck-in thermal stability.
  • the resultant limited 5 coating speeds are undesirable, of course, from the standpoint of poor economics of production resulting
  • Patent 798,908 The blends disclosed in that patent have a high melt index and a high swell ratio.
  • the melt index is at least 8 dg./min and the swell ratio is at least 1.50.
  • the polyethylene blends of this invention have a lower melt index and a lower swell ratio than the prior art blends. These blends provide extrusion
  • blends can be coated by extrusion at commercially acceptable speeds.
  • polyethylene blends of this invention provide coatings that have better
  • the blends are prepared by mixing a low density polyethylene having a density above .91 to .93 with a high density polyethylene having a density of .96 to .98 to provide blends having a melt index of .1 to
  • From 10% to 90% by weight of a high density polyethylene is mixed with from 90% to 10% by weight of a low density polyethylene.
  • the preferred blends contain from 20% to 70%, most preferably, 30% to 65%, by weight, of
  • the melt indices range from .1 dg/min. to 7 dg/min. These blends also have a DSC melting point greater than a homopolymer of ethylene having the density of the blend. 5
  • the blends may contain such additives as ultraviolet degradation inhibitors, stabilizers, pigments, inert fillers and the like which are commonly employed in resinous systems for a variety of purposes.
  • the blends may be prepared in various 10 ways such as dry-blending and then passing through a compounding extruder, milling roll, or Banbury mixer. Any method whereby melts of the components can be mixed will also produce the desired blend.
  • the low density polyethylene has a density of 15 0.912 g/cc to 0.
  • the preferred low density polyethylene has a density of 0.915 g/cc to 0.920 g/cc and a melt index of 2.9 dg/min to 16 dg/min.
  • Several such low density polyethylenes which have 20 been most preferred are as follows: 0.919 g/cc, 3.g dg/min; 0.917 g/cc, 3.5 dg/min; 0.919 g/cc, 15 dg/min.
  • the high density polyethylene has a density of 0.96 g/cc to 0.98 g/cc, a melt index of 5 dg/min to 18 dg/min.
  • One such high density polyethylene which has been most preferred has a density of 0.970 g/cc, and a melt index of 9.0 dg/min. 30
  • density is determined in conformance with ASTM Designation D1505-57D. Density specimens are first annealed to give maximum density by conditioning under a 63.5 cm or higher mercury vacuum for 1 hour at 150-155°C. 35 followed by cooling under this vacuum at no greater than 20°C. per hour to a final temperature of less than 50°C. Melt index is determined in conformance with ASTM Designation D1238-62T.
  • a polyethylene blend having a density of 0.935 g/cc, a melt index of 3.1 dg/min, and a swell ratio of 1.44 was prepared by blending 70 weight percent of a low density polyethylene with 30 weight percent of a high density polyethylene.
  • Those of the high density component are as follows: density ⁇ 0.971; MI s 15.0 dg/min.
  • the blend was fed to a 8.89 cm Egan extruder having a barrel length to diameter ratio of 24:1.
  • the four zones of the extruder were maintained, from back to front, at 204°C, 260°C, 316°C, and 338°C.
  • a metering type screw having six compression flights, and 12 metering flights were used.
  • Prior to entering the die the melt passed through a 9 x 9 strand per square cm. mesh screen.
  • the die was an Egan die, center-fed with 1.27 cm long lands, with an opening of 40.64 cm x .05 cm.
  • the temperature of the die was held at 316°C.
  • the extrusion rate was held constant at 59 kg per hour.
  • the resulting film extrudate was passed through a 11.4 cm air gap into the nip formed by a rubber-covered pressure roll and a chill roll.
  • 18.14 kg basis weight Kraft paper was fed into the nip with the pressure roll in contact with the Kraft paper.
  • the nip pressure applied was 445 N per linear 25.4 mm.
  • the chill roll was a 60.96 cm diameter mirror finish chrome-plated steel roll, water cooled to maintain a temperature of 15.50°C. on the roll.
  • the coated paper was taken off the chill roll at a point 180° from the nip formed by the pressure roll and chill roll.
  • the chill roll was operated at linear speeds of greater than 396.24 meter per minute.
  • This coating composition coated the paper substrate at a commercially acceptable rate with a ' neck-in per edge of 2.67 cm which is also commercially acceptable.
  • a polyethylene blend having a density of 0.947 Q g/cc, a melt index of 6.4 dg/min, and a swell ratio of 1.38 was prepared by blending 70 weight percent of a low density polyethylene with 30 weight percent of a high density polyethylene.
  • the blend was fed to a 1.38 cm Egan extruder having a barrel length to diameter ratio of 24:1.
  • the four zones of the extruder were maintained, from back to front, at 204°C, 260°C, 304°C, and 332°C.
  • a metering type screw having six compression flights, and 12 metering 5 flights were used.
  • Prior to entering the die the melt passed 9 x 9 strand per square cm mesh screen.
  • the die was an Egan die, center-fed with 1.27 cm long lands, with an opening of 40.6 cm x .05 cm.
  • the temperature of the die was held at 316°C.
  • the extrusion rate was held constant at 59 kg per hour.
  • the resulting film extrudate was passed through a 11.4 cm air gap into the nip formed by a rubber-covered pressure roll and a chill roll. At the same time, 18.14 kg basis weight Kraft paper was fed into the nip with the pressure roll in contact with the Kraft paper. The nip pressure applied was
  • the chill roll was a 60.96 cm diameter mirror finish chrome-plated steel roll, water cooled to maintain a temperature of 15.5°C. on the roll.
  • the coated paper was taken off the chill roll at a point 180° from the nip formed by the pressure roll and chill roll.
  • the chill roll was operated at linear speeds of about 335.3 meters per minute.
  • This extrusion coating composition had a melt index which provided acceptable commercial coating speeds with good neck-in per edge of about 2.67 cm.
  • a polyethylene blend having a density of 0.947 g/cc, a melt index of 13 dg/min, and a swell ratio of 1.30 was prepared and coated according to the above procedure. The composition coated at linear coating speed of only about 259 meters per minute and had an excessive neck-in per edge of about 7.6 cm which is not satisfactory for commercial operation.
  • a polyethylene blend having a density of 0.932 g/cc, a melt index of 8.1 dg/min, and a swell ratio of 1.2 was prepared and coated according to the above procedure.
  • a polyethylene blend having a density of 0.950 g/cc, a melt index of 5 dg/min, and a swell ratio of 1.64 was prepared and coated according to the above procedure.
  • a polyethylene blend having a density of 0.954 g/cc, a melt index of 7.9 dg/min, and a swell ratio of 1.72 was prepared and coated according to the above procedure.
  • the composition provided satisfactory coatings at speeds of only 13.41 meters per minute to have neck-in or edge weave of about 1.52 cm per edge.
  • the coating composition of this invention provides good coating to substrates such as Kraft paper, milk carton stock, photographic papers, cellulosic sheets, primed metal foils such as aluminum and the like.
  • substrates such as Kraft paper, milk carton stock, photographic papers, cellulosic sheets, primed metal foils such as aluminum and the like.
  • the coated substrates find utility in food packaging, medicine packing or other well known uses.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Mélanges de polyéthylène utiles en tant que revêtement par extrusion sur divers substrats. Les mélanges sont préparés à partir de 10 % jusqu'à 90 % en poids d'un polyéthylène de densité élevée et à partir de 90 % jusqu'à 10 % en poids d'un polyéthylène de faible densité. Les mélanges ont un indice de mélange de 0,1 à 7, une densité de 0,912 à 0,98, un rapport de gonflement inférieur à 1,5 et un point de fusion DSC supérieur à celui d'un homopolymère d'éthylène ayant la densité du mélange.
PCT/US1982/000916 1981-07-28 1982-07-09 Melanges de revetement par extrusion de polyethylene a deux composants WO1983000490A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI830791A FI830791L (fi) 1981-07-28 1983-03-09 Tvaokomponentblandningar av polyeten foer belaeggning med straengsprutmaskin

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US28767081A 1981-07-28 1981-07-28
US287,670810728 1981-07-28

Publications (1)

Publication Number Publication Date
WO1983000490A1 true WO1983000490A1 (fr) 1983-02-17

Family

ID=23103865

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1982/000916 WO1983000490A1 (fr) 1981-07-28 1982-07-09 Melanges de revetement par extrusion de polyethylene a deux composants

Country Status (4)

Country Link
EP (1) EP0084049A4 (fr)
JP (1) JPS58501181A (fr)
WO (1) WO1983000490A1 (fr)
ZA (1) ZA825431B (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0607783A2 (fr) * 1993-01-22 1994-07-27 Tarkett Pegulan Aktiengesellschaft Compositions pour laminer, feuilles laminées thermoplastiques et procédé pour leur fabrication
EP0679704A1 (fr) * 1994-04-27 1995-11-02 Sumitomo Chemical Company, Limited Procédé pour revêtir des tuyaux en acier avec une composition de résines et produit stratifié obtenu
EP0692529A1 (fr) * 1994-07-13 1996-01-17 Sumitomo Chemical Company, Limited Procédé pour revêtir de l'acier avec une résine thermoplastique (composition) et article stratifié ainsi obtenu
WO1999009097A1 (fr) * 1997-08-14 1999-02-25 Eastman Chemical Company Polyethylenes aux proprietes de thermosoudage ameliorees
US6174612B1 (en) 1998-06-02 2001-01-16 Eastman Chemical Company Polyethylenes with enhanced heat seal properties
WO2002048258A2 (fr) * 2000-11-21 2002-06-20 Eastman Chemical Company Melanges renfermant du polyethylene lineaire a faible densite, du polyethylene a densite elevee et du polyethylene a faible densite particulierement conçus pour des revetements par extrusion et des films
WO2005121239A2 (fr) * 2004-05-06 2005-12-22 Dow Global Technologies Inc. Compositions polymeres de moulage
US8916649B2 (en) 2004-07-07 2014-12-23 Dow Global Technologies Llc Multistage process for producing ethylene polymer compositions
WO2015092662A1 (fr) 2013-12-19 2015-06-25 Nova Chemicals (International) S.A. Composition de polyéthylène pour revêtement par extrusion
WO2017003463A1 (fr) 2015-06-30 2017-01-05 Dow Global Technologies Llc Compositions polymères à base d'éthylène destinées à des revêtements par extrusion améliorés
WO2018118362A1 (fr) 2016-12-22 2018-06-28 Dow Global Technologies Llc Procédé de fabrication de compositions polymères à base d'éthylène haute densité présentant une grande résistance à la fusion
WO2018194881A1 (fr) * 2017-04-17 2018-10-25 Chevron Phillips Chemical Company Lp Nouvelles compositions de polyéthylène et procédés pour leur fabrication et leur utilisation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB944208A (en) * 1961-07-13 1963-12-11 Phillips Petroleum Co Improvements relating to extrusion coating resins comprising a polyethylene blend
US3183283A (en) * 1958-01-08 1965-05-11 Union Carbide Corp Blends of low molecular weight, highly branched polyethylenes with high molecular weight, sparsely branched polyethylenes
US3231636A (en) * 1958-03-20 1966-01-25 Union Carbide Corp High shear strength blends of high and low density polyethylene
US3381060A (en) * 1965-07-27 1968-04-30 Union Carbide Corp Low density polyethylene containing two high density polyethylenes
US3998914A (en) * 1972-02-01 1976-12-21 Du Pont Of Canada Limited Film from a blend of high density polyethylene and a low density ethylene polymer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3794698A (en) * 1972-03-09 1974-02-26 Eastman Kodak Co Polyethylene containing extrusion coating compositions

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183283A (en) * 1958-01-08 1965-05-11 Union Carbide Corp Blends of low molecular weight, highly branched polyethylenes with high molecular weight, sparsely branched polyethylenes
US3231636A (en) * 1958-03-20 1966-01-25 Union Carbide Corp High shear strength blends of high and low density polyethylene
GB944208A (en) * 1961-07-13 1963-12-11 Phillips Petroleum Co Improvements relating to extrusion coating resins comprising a polyethylene blend
US3381060A (en) * 1965-07-27 1968-04-30 Union Carbide Corp Low density polyethylene containing two high density polyethylenes
US3998914A (en) * 1972-02-01 1976-12-21 Du Pont Of Canada Limited Film from a blend of high density polyethylene and a low density ethylene polymer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0084049A4 *

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0607783A2 (fr) * 1993-01-22 1994-07-27 Tarkett Pegulan Aktiengesellschaft Compositions pour laminer, feuilles laminées thermoplastiques et procédé pour leur fabrication
EP0607783A3 (fr) * 1993-01-22 1995-02-22 Pegulan Tarkett Ag Compositions pour laminer, feuilles laminées thermoplastiques et procédé pour leur fabrication.
EP0679704A1 (fr) * 1994-04-27 1995-11-02 Sumitomo Chemical Company, Limited Procédé pour revêtir des tuyaux en acier avec une composition de résines et produit stratifié obtenu
EP0692529A1 (fr) * 1994-07-13 1996-01-17 Sumitomo Chemical Company, Limited Procédé pour revêtir de l'acier avec une résine thermoplastique (composition) et article stratifié ainsi obtenu
WO1999009097A1 (fr) * 1997-08-14 1999-02-25 Eastman Chemical Company Polyethylenes aux proprietes de thermosoudage ameliorees
US6174612B1 (en) 1998-06-02 2001-01-16 Eastman Chemical Company Polyethylenes with enhanced heat seal properties
WO2002048258A2 (fr) * 2000-11-21 2002-06-20 Eastman Chemical Company Melanges renfermant du polyethylene lineaire a faible densite, du polyethylene a densite elevee et du polyethylene a faible densite particulierement conçus pour des revetements par extrusion et des films
WO2002048258A3 (fr) * 2000-11-21 2003-03-06 Eastman Chem Co Melanges renfermant du polyethylene lineaire a faible densite, du polyethylene a densite elevee et du polyethylene a faible densite particulierement conçus pour des revetements par extrusion et des films
US8247497B2 (en) 2004-05-06 2012-08-21 Dow Global Technologies Llc Polymer molding compositions
WO2005121239A3 (fr) * 2004-05-06 2006-05-04 Dow Global Technologies Inc Compositions polymeres de moulage
US7790826B2 (en) 2004-05-06 2010-09-07 DowGlobal Technologies Inc. Polymer molding compositions
AU2005252628B2 (en) * 2004-05-06 2011-03-03 Dow Global Technologies Llc Polymer molding compositions
WO2005121239A2 (fr) * 2004-05-06 2005-12-22 Dow Global Technologies Inc. Compositions polymeres de moulage
US8916649B2 (en) 2004-07-07 2014-12-23 Dow Global Technologies Llc Multistage process for producing ethylene polymer compositions
WO2015092662A1 (fr) 2013-12-19 2015-06-25 Nova Chemicals (International) S.A. Composition de polyéthylène pour revêtement par extrusion
US20180134881A1 (en) * 2015-06-30 2018-05-17 Dow Global Technologies Llc Ethylene-based polymer compositions for improved extrusion coatings
CN107922681A (zh) * 2015-06-30 2018-04-17 陶氏环球技术有限责任公司 用于改进的挤压涂层的乙烯基聚合物组合物
WO2017003463A1 (fr) 2015-06-30 2017-01-05 Dow Global Technologies Llc Compositions polymères à base d'éthylène destinées à des revêtements par extrusion améliorés
US10457799B2 (en) 2015-06-30 2019-10-29 Dow Global Technologies Llc Ethylene-based polymer compositions for improved extrusion coatings
WO2018118362A1 (fr) 2016-12-22 2018-06-28 Dow Global Technologies Llc Procédé de fabrication de compositions polymères à base d'éthylène haute densité présentant une grande résistance à la fusion
WO2018194881A1 (fr) * 2017-04-17 2018-10-25 Chevron Phillips Chemical Company Lp Nouvelles compositions de polyéthylène et procédés pour leur fabrication et leur utilisation
US10214603B2 (en) 2017-04-17 2019-02-26 Chevron Phillips Chemical Company Lp Polyethylene compositions and methods of making and using same
CN110520297A (zh) * 2017-04-17 2019-11-29 切弗朗菲利浦化学公司 新颖聚乙烯组合物及其制造和使用方法
KR20190137102A (ko) * 2017-04-17 2019-12-10 셰브론 필립스 케미컬 컴퍼니 엘피 신규한 폴리에틸렌 조성물 및 이의 제조 및 사용 방법
RU2731912C1 (ru) * 2017-04-17 2020-09-09 Шеврон Филлипс Кемикал Компани Лп Новые полиэтиленовые композиции и способы их получения и применения
CN110520297B (zh) * 2017-04-17 2022-02-11 切弗朗菲利浦化学公司 新颖聚乙烯组合物及其制造和使用方法
KR102467185B1 (ko) * 2017-04-17 2022-11-14 셰브론 필립스 케미컬 컴퍼니 엘피 신규한 폴리에틸렌 조성물 및 이의 제조 및 사용 방법

Also Published As

Publication number Publication date
EP0084049A4 (fr) 1983-12-23
EP0084049A1 (fr) 1983-07-27
JPS58501181A (ja) 1983-07-21
ZA825431B (en) 1983-03-30

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