Polyethylene films and method of making the same
    5.
    发明授权
    Polyethylene films and method of making the same 有权
    聚乙烯薄膜及其制作方法

    公开(公告)号:US08273449B2

    公开(公告)日:2012-09-25

    申请号:US12594963

    申请日:2008-04-04

    IPC分类号: C08F210/02 B32B27/32

    摘要: 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.

    摘要翻译: 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。

    POLYETHYLENE FILMS AND METHOD OF MAKING THE SAME
    6.
    发明申请
    POLYETHYLENE FILMS AND METHOD OF MAKING THE SAME 有权
    聚乙烯薄膜及其制备方法

    公开(公告)号:US20100119793A1

    公开(公告)日:2010-05-13

    申请号:US12594963

    申请日:2008-04-04

    摘要: 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.

    摘要翻译: 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。