Hot fill process with closures made from high density polyethylene compositions
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B67C-003/22
B65B-007/28
C08L-023/08
B65B-003/04
출원번호
US-0000231
(2016-01-19)
등록번호
US-10071826
(2018-09-11)
우선권정보
CA-2914353 (2015-12-10)
발명자
/ 주소
Wang, XiaoChuan
출원인 / 주소
NOVA Chemicals (International) S.A.
대리인 / 주소
Heinrich, Julie L.
인용정보
피인용 횟수 :
0인용 특허 :
48
초록
High density (density ≥0.950 g/cm3) polyethylene compositions for use in hot fill closures and processes.
대표청구항▼
1. A process to fill a container, the process comprising: adding a hot liquid to the container through a container opening, sealing the container opening with a closure comprising a high density polyethylene composition, and bringing the hot liquid into contact with an interior surface of the closur
1. A process to fill a container, the process comprising: adding a hot liquid to the container through a container opening, sealing the container opening with a closure comprising a high density polyethylene composition, and bringing the hot liquid into contact with an interior surface of the closure; wherein the high density polyethylene composition comprises: (1) about 10 to about 70 wt % of a first ethylene copolymer having a melt index I2, of from 0.1 to 10 g/10 min; a molecular weight distribution Mw/Mn, of less than 2.7; and a density of from 0.930 to 0.960 g/cm3; and(2) about 90 to about 30 wt % of a second ethylene copolymer having a melt index I2, of from 50 to 10,000 g/10 min; a molecular weight distribution Mw/Mn, of less than 2.7; and a density higher than the density of the first ethylene copolymer, but less than 0.966 g/cm3; wherein the density of the second ethylene copolymer is less than 0.037 g/cm3 higher than the density of the first ethylene copolymer; the ratio (SCB1/SCB2) of the number of short chain branches per thousand carbon atoms in the first ethylene copolymer (SCB1) to the number of short chain branches per thousand carbon atoms in the second ethylene copolymer (SCB2) is greater than 1.0; and wherein the polyethylene composition has a molecular weight distribution Mw/Mn, of from 2.0 to 7.0; a density of at least 0.950 g/cm3; and a melt index I2, of greater than 3.0 to less than 20.0 g/10 min. 2. The process of claim 1 wherein the high density polyethylene composition has a high load melt index I21, of from 150 to 400 g/10 min. 3. The process of claim 1 wherein the high density polyethylene composition has a Z-average molecular weight, MZ of less than about 300,000. 4. The process of claim 1 wherein the high density polyethylene composition has a melt flow ratio, I21/I2 of from 22 to 50. 5. The process of claim 1 wherein the high density polyethylene composition has and an ESCR Condition B (100% IGEPAL) of at least about 3.5 hours. 6. The process of claim 1 wherein the high density polyethylene composition has a TD/MD shrinkage ratio of from about 0.90 to about 1.15 when measured according to the Dimensional Stability Test (DST). 7. The process of claim 1 wherein the first and second ethylene copolymers are made by polymerizing ethylene and an alpha olefin in the presence of a single site catalyst. 8. The process of claim 1 wherein the first ethylene copolymer has a density of from 0.936 to 0.952 g/cm3. 9. The process of claim 1 wherein the second ethylene copolymer has a density of less than 0.965 g/cm3. 10. The process of claim 1 wherein the high density polyethylene composition has a density of from 0.952 to 0.960 g/cm3. 11. The process of claim 1 wherein the density of the second ethylene copolymer is less than 0.030 g/cm3 higher than the density of the first ethylene copolymer. 12. The process of claim 1 wherein the first and second ethylene copolymers have a Mw/Mn of less than 2.3. 13. The process of claim 1 wherein the high density polyethylene composition comprises: from about 25 to about 60 wt % of the first ethylene copolymer; andfrom about 75 to about 40 wt % of the second ethylene copolymer. 14. The process of claim 1 wherein the high density polyethylene composition further comprises a nucleating agent or a combination of nucleating agents. 15. The process of claim 1 wherein the first and second ethylene copolymers are copolymers of ethylene and 1-octene. 16. The process of claim 1 wherein the closure is made by continuous compression molding or injection molding. 17. The process of claim 1 wherein the high density polyethylene composition is prepared by contacting ethylene and an alpha-olefin with a polymerization catalyst under solution polymerization conditions in a least two polymerization reactors. 18. The process of claim 1 wherein high density polyethylene composition has a stress exponent of less than 1.40. 19. Use of a closure in a hot fill process, wherein the closure comprises a high density polyethylene composition comprising: (1) about 10 to about 70 wt % of a first ethylene copolymer having a melt index I2, of from 0.1 to 10 g/10 min; a molecular weight distribution Mw/Mn, of less than 2.7; and a density of from 0.930 to 0.960 g/cm3; and(2) about 90 to about 30 wt % of a second ethylene copolymer having a melt index I2, of from 50 to 10,000 g/10 min; a molecular weight distribution Mw/Mn, of less than 2.7; and a density higher than the density of the first ethylene copolymer, but less than 0.966 g/cm3; wherein the density of the second ethylene copolymer is less than 0.037 g/cm3 higher than the density of the first ethylene copolymer; the ratio (SCB1/SCB2) of the number of short chain branches per thousand carbon atoms in the first ethylene copolymer (SCB1) to the number of short chain branches per thousand carbon atoms in the second ethylene copolymer (SCB2) is greater than 1.0; and wherein the polyethylene composition has a molecular weight distribution Mw/Mn, of from 2.0 to 7.0; a density of at least 0.950 g/cm3; and a melt index I2, of greater than 3.0 to less than 20.0 g/10 min. 20. The use of a closure according to claim 19 wherein the high density polyethylene composition has a high load melt index I21, of from 150 to 400 g/10 min. 21. The use of a closure according to claim 19 wherein the high density polyethylene composition has a Z-average molecular weight, MZ of less than about 300,000. 22. The use of a closure according to claim 19 wherein the high density polyethylene composition has a melt flow ratio, I21/I2 of from 22 to 50. 23. The use of a closure according to claim 19 wherein the high density polyethylene composition has and an ESCR Condition B (100% IGEPAL) of at least about 3.5 hours. 24. The use of a closure according to claim 19 wherein the high density polyethylene composition has a TD/MD shrinkage ratio of from about 0.90 to about 1.15 when measured according to the Dimensional Stability Test (DST). 25. The use of a closure according to claim 19 wherein the first and second ethylene copolymers are made by polymerizing ethylene and an alpha olefin in the presence of a single site catalyst. 26. The use of a closure according to claim 19 wherein the first ethylene copolymer has a density of from 0.936 to 0.952 g/cm3. 27. The use of a closure according to claim 19 wherein the second ethylene copolymer has a density of less than 0.965 g/cm3. 28. The use of a closure according to claim 19 wherein the high density polyethylene composition has a density of from 0.952 to 0.960 g/cm3. 29. The use of a closure according to claim 19 wherein the density of the second ethylene copolymer is less than 0.030 g/cm3 higher than the density of the first ethylene copolymer. 30. The use of a closure according to claim 19 wherein the first and second ethylene copolymers have a Mw/Mn of less than 2.3. 31. The use of a closure according to claim 19 wherein the high density polyethylene composition comprises: from about 25 to about 60 wt % of the first ethylene copolymer; andfrom about 75 to about 40 wt % of the second ethylene copolymer. 32. The use of a closure according to claim 19 wherein the high density polyethylene composition further comprises a nucleating agent or a combination of nucleating agents. 33. The use of a closure according to claim 19 wherein the first and second ethylene copolymers are copolymers of ethylene and 1-octene. 34. The use of a closure according to claim 19 wherein the closure is made by continuous compression molding or injection molding. 35. The use of a closure according to claim 19 wherein the high density polyethylene composition is prepared by contacting ethylene and an alpha-olefin with a polymerization catalyst under solution polymerization conditions in a least two polymerization reactors. 36. The use of a closure according to claim 19 wherein high density polyethylene composition has a stress exponent of less than 1.40. 37. A process to fill a container, the process comprising: adding a hot liquid to the container through a container opening; sealing the container opening with a closure comprising a high density polyethylene composition which is bimodal and has a density of at least 0.950 g/cm3, a molecular weight distribution Mw/Mn, of from 2.0 to 7.0, and a melt index I2, of from higher than 3.0 g/10 min to less than 20.0 g/10 min; and bringing the hot liquid into contact with an interior surface of the closure; wherein the closure has a time exponent, m of 0.105 or less where m is determined using a compressive strain model represented by the equation: ε=A×σn×tm where ε is the compressive strain; σ is the stress in N/cm2, t is the loading time in seconds, A is the model coefficient, n is the deformation stress exponent and m is the time exponent. 38. Use of a closure in a hot fill process, wherein the closure comprises a high density polyethylene composition which is bimodal and has a density of at least 0.950 g/cm3, a molecular weight distribution Mw/Mn, of from 2.0 to 7.0, and a melt index I2, of from higher than 3.0 g/10 min to less than 20.0 g/10 min; wherein the closure has a time exponent, m of 0.105 or less, where m is determined using a compressive strain model represented by the equation: ε=A×σn×tm where ε is the compressive strain; σ is the stress in N/cm2, t is the loading time in seconds, A is the model coefficient, n is the deformation stress exponent and m is the time exponent.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (48)
Kishimoto Teiji (Kawanishi JA) Kochi Hiromu (Sakai JA) Kaneda Yoshiyuki (Osaka JA), 1,2,3,4-Tetrahydroisoquinoline derivatives and the preparation thereof.
McMeeking John,CAX ; Gao Xiaoliang,CAX ; von Haken Spence Rupert Edward,CAX ; Brown Stephen John,CAX ; Jeremic Dusan,CAX, Catalyst having a ketimide ligand.
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.
Stephan Douglas W.,CAX ; Stewart Jeff C.,CAX ; Brown Stephen John,CAX ; Swabey John William,CAX ; Wang Qinyan,CAX, High temperature solution polymerization process with phosphinimine cyclopentadienyl metal (GRP IV) complex.
Meathrel William G. (Buffalo NY) Saleem Mohammad (Gananoque CAX) Binks Shirley A. (Ontario CAX), Hydrogel adhesive for attaching medical device to patient.
Wilson David R. ; Nickias Peter N. ; Neithamer David R. ; Ernst Richard D., Metal complexes containing bridged, non-aromatic, anionic, dienyl groups and addition polymerization catalysts therefrom.
Kerins Gerard J. (New Fairfield CT) Collette Wayne N. (Merrimack NH) Beck Martin H. (Merrimack NH) Clark Richard E. (Merrimack NH) Harry Ieuan L. (Nashua NH) Krishnakumar Suppayan (Nashua NH) Miller , Method for producing a hot fillable, collapse resistant polyester container without the need to utilize set process tech.
Andison, David; Scheffer, Steven, Method of supporting plastic containers during product filling and packaging when exposed to elevated temperatures and internal pressure variations.
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.
Joseph C. Floyd ; Moses Olukayode Jejelowo ; Donna Jean Crowther ; George Alan Vaughan ; Ching Tai Lue, Olefin polymerization process with alkyl-substituted metallocenes.
Wang, XiaoChuan; Lacombe, Yves; Checknita, Douglas Walter; Rejman, Mark; Botros, Matthew Zaki; Anseeuw, Renee Laurel, Polyethylene compositions having high dimensional stability and excellent processability for caps and closures.
Saleh, Navid; Ziehl, Paul; Matta, Fabio; Aich, Nirupam; Zohhadi, Nima; Khan, Iftheker A., Polymeric additive for strength, deformability, and toughness enhancement of cemetitious materials and composites.
Douglas W. Stephan CA; Jeff C. Stewart CA; Stephen John Brown CA; John William Swabey CA; Qinyan Wang CA, Polymerization catalyst having a phosphinimine ligand.
Wien,Richard W.; Patton,David L.; Bringley,Joseph F.; Lerat,Yannick J. F., Use of derivatized nanoparticles to minimize growth of micro-organisms in hot filled drinks.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.