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    • 4. 发明授权
    • Polyethylene films and method of making the same
    • 聚乙烯薄膜及其制作方法
    • US08273449B2
    • 2012-09-25
    • US12594963
    • 2008-04-04
    • Sylvie DesjardinsMarc A. SpringsPhillip D. HustadNathan J. WikerJesus NietoWayde V. Konze
    • Sylvie DesjardinsMarc A. SpringsPhillip D. HustadNathan J. WikerJesus NietoWayde V. Konze
    • C08F210/02B32B27/32
    • C08F210/16C08J5/18C08J2323/08C08F4/52C08F210/14C08F2500/03C08F2500/12C08F2500/17C08F2500/26
    • The instant invention is a polyethylene film, and method of making the same. The polyethylene film according to instant invention includes at least one heterogeneously branched ethylene/α-olefin copolymer having a density in the range of about 0.910 to about 0.930 g/cm3, a molecular weight distribution in the range of about 2.8 to 3.8, a melt index (I2) in the range of about 0.3 to about 4 g/10 min, and an I10/I2 ratio in the range of 6.5 to about 7.8. The film has a normalized dart impact strength of equal or greater than (6666-7012*density) g/mil, a normalized tear strength of equal or greater than (440*e−(density−0.915)2/2*(0.00949)2) g/mil, and a haze in the range of 3 to 10 percent. The method of making the polyethylene film according to instant invention includes the following steps: (1) providing at least one heterogeneously branched ethylene/α-olefin copolymer having a density in the range of about 0.910 to about 0.930 g/cm3, a molecular weight distribution in the range of about 2.8 to 3.8, a melt index (I2) in the range of about 0.3 to about 4 g/10 min, and an I10/I2 ratio in the range of 6.5 to about 7.8; (2) processing the heterogeneously branched ethylene/α-olefin copolymer via blown film extrusion process or cast film extrusion process; and (3) thereby forming a film having a normalized dart impact strength of equal or greater than (6666-7012*density) g/mil, a normalized tear strength of equal or greater than (440*e−(density−0.915)2/2*(0.00949)2) g/mil, and a haze in the range of 3 to 10 percent.
    • 本发明是一种聚乙烯薄膜及其制造方法。 根据本发明的聚乙烯膜包括至少一种非均相支化的乙烯/α-烯烃共聚物,其密度在约0.910至约0.930g / cm 3范围内,分子量分布在约2.8至3.8的范围内,熔体 指数(I 2)在约0.3至约4g / 10min的范围内,I10 / I2比在6.5至约7.8的范围内。 标准化的落镖冲击强度等于或大于(6666-7012 *密度)g / mil,归一化的撕裂强度等于或大于(440 * e-(密度-0.915)2/2 *(0.00949) 2)g / mil,雾度在3%至10%的范围内。 根据本发明的制备聚乙烯膜的方法包括以下步骤:(1)提供至少一种密度在约0.910至约0.930g / cm 3范围内的非均匀支化的乙烯/α-烯烃共聚物,分子量 分布在约2.8至3.8的范围内,熔体指数(I 2)在约0.3至约4g / 10min的范围内,I10 / I2比在6.5至约7.8的范围内; (2)通过吹膜挤出法或流延膜挤出法处理非均匀支化的乙烯/α-烯烃共聚物; (3),由此形成具有等于或大于(6666-7012 *密度)g / mil的标准化落镖冲击强度的膜,标准化的撕裂强度等于或大于(440 * e-(密度-0.915)2 /2*(0.00949)2)g / mil,雾度在3%到10%的范围内。
    • 5. 发明申请
    • POLYETHYLENE FILMS AND METHOD OF MAKING THE SAME
    • 聚乙烯薄膜及其制备方法
    • US20100119793A1
    • 2010-05-13
    • US12594963
    • 2008-04-04
    • Sylvie DesjardinsMarc A. SpringsPhillip D. HustadNathan J. WikerJesus NietoWayde V. Konze
    • Sylvie DesjardinsMarc A. SpringsPhillip D. HustadNathan J. WikerJesus NietoWayde V. Konze
    • B32B27/32C08F210/02C08F210/14B29C47/14
    • C08F210/16C08J5/18C08J2323/08C08F4/52C08F210/14C08F2500/03C08F2500/12C08F2500/17C08F2500/26
    • The instant invention is a polyethylene film, and method of making the same. The polyethylene film according to instant invention includes at least one heterogeneously branched ethylene/α-olefin copolymer having a density in the range of about 0.910 to about 0.930 g/cm3, a molecular weight distribution in the range of about 2.8 to 3.8, a melt index (I2) in the range of about 0.3 to about 4 g/10 min, and an I10/I2 ratio in the range of 6.5 to about 7.8. The film has a normalized dart impact strength of equal or greater than (6666-7012*density) g/mil, a normalized tear strength of equal or greater than (440*e−(density−0.915)2/2*(0.00949)2) g/mil, and a haze in the range of 3 to 10 percent. The method of making the polyethylene film according to instant invention includes the following steps: (1) providing at least one heterogeneously branched ethylene/α-olefin copolymer having a density in the range of about 0.910 to about 0.930 g/cm3, a molecular weight distribution in the range of about 2.8 to 3.8, a melt index (I2) in the range of about 0.3 to about 4 g/10 min, and an I10/I2 ratio in the range of 6.5 to about 7.8; (2) processing the heterogeneously branched ethylene/α-olefin copolymer via blown film extrusion process or cast film extrusion process; and (3) thereby forming a film having a normalized dart impact strength of equal or greater than (6666-7012*density) g/mil, a normalized tear strength of equal or greater than (440*e−(density−0.915)2/2*(0.00949)2) g/mil, and a haze in the range of 3 to 10 percent.
    • 本发明是一种聚乙烯薄膜及其制造方法。 根据本发明的聚乙烯膜包括至少一种非均相支化的乙烯/α-烯烃共聚物,其密度在约0.910至约0.930g / cm 3范围内,分子量分布在约2.8至3.8的范围内,熔体 指数(I 2)在约0.3至约4g / 10min的范围内,I10 / I2比在6.5至约7.8的范围内。 标准化的落镖冲击强度等于或大于(6666-7012 *密度)g / mil,归一化的撕裂强度等于或大于(440 * e-(密度-0.915)2/2 *(0.00949) 2)g / mil,雾度在3%至10%的范围内。 根据本发明的制备聚乙烯膜的方法包括以下步骤:(1)提供至少一种密度在约0.910至约0.930g / cm 3范围内的非均匀支化的乙烯/α-烯烃共聚物,分子量 分布在约2.8至3.8的范围内,熔体指数(I 2)在约0.3至约4g / 10min的范围内,I10 / I2比在6.5至约7.8的范围内; (2)通过吹膜挤出法或流延膜挤出法处理非均匀支化的乙烯/α-烯烃共聚物; (3),由此形成具有等于或大于(6666-7012 *密度)g / mil的标准化落镖冲击强度的膜,标准化的撕裂强度等于或大于(440 * e-(密度-0.915)2 /2*(0.00949)2)g / mil,雾度在3%到10%的范围内。