Abstract:
The present invention provides coated films and packages formed from such films. In one aspect, a coated film comprises (a) a film comprising (i) a first layer comprising from 70 to 100 percent by weight of a polyethylene having a density 0.930 g/cm 3 or less and a peak melting point of less than 126°C; (ii) a second layer comprising from 60 to 100 percent by weight polyethylene having a density of 0.905 to 0.970 g/cm 3 and a peak melting point in the range of 100° C to 135° C; and (iii) at least one inner layer between the first layer and the second layer comprising from 40 to 100 percent by weight of a polyethylene having a density from 0.930 to 0.970 g/cm 3 and a peak melting point in the range of 120° C to 135° C, wherein the polyethylene is a medium density polyethylene or a high density polyethylene; and (b) a coating on an outer surface of the second layer of the film comprising a crosslinked polyurethane, wherein the coating is substantially free of isocyanate groups. In some embodiments, the coated film is thermally resistant when subjected to a W-fold test at a temperature of at least 230° F, and/or has a gloss of at least 70 units at 60°.
Abstract translation:本发明提供了由这种膜形成的涂覆膜和包装。 在一个方面,涂覆膜包含(a)包含(i)第一层和第二层的膜,所述第一层包含70至100重量%的密度为0.930g / cm 3或更小的聚乙烯和 峰值熔点低于126℃; (ii)第二层,其包含60至100重量%的聚乙烯,其密度为0.905至0.970g / cm 3且峰值熔点为100℃; C到135° C; 和(iii)第一层和第二层之间的至少一个内层,其包含40至100重量%的密度为0.930至0.970g / cm 3的聚乙烯和峰值熔融 指向120°的范围内。 C到135° 其中聚乙烯是中密度聚乙烯或高密度聚乙烯; 和(b)在包含交联聚氨酯的膜的第二层的外表面上的涂层,其中涂层基本上不含异氰酸酯基团。 在一些实施方案中,当在至少230℃的温度下进行W-折叠测试时,涂覆的薄膜是耐热的。 F,和/或在60℃时具有至少70个单位的光泽。
Abstract:
The instant invention provides polyethylene compositions having reduced plate out, and films made therefrom having reduced blooming. The polyethylene composition suitable for film applications according to the present invention comprises the melt blending product of: (a) an ethylene based polymer; (b) a first antioxidant system comprising one or more antioxidants selected from the group consisting of Octadecyl-3-(3,5-di-tert.butyl-4-hydroxyphenyl)-propionate; Pentaerythritol Tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate); and combinations thereof; (c) a second antioxidant system comprising a liquid phosphite corresponding to the formula [4-(2-methylbutan-2-yl)phenyl]x[2,4-bis(2-methylbutan-2-yl)phenyl]3-x phosphate, wherein x = 0, 1, 2, 3, or combinations thereof; and (d) optionally one or more neutralizing agents.
Abstract:
The present disclosure relates to a multilayer stretch film comprising at least a first layer, wherein said first layer comprises a polyolefin resin. The film of this aspect of the disclosure further include at least a second layer, and a mechanochromic dye which may be in any or all layers of the film. Another aspect of the disclosure is a method of promoting optimal stretching of stretch film during a wrapping operation, which method comprises at least the following steps. A polyolefin resin is selected that has a given density. Selecting a mechanochromic dye based on its ability to agglomerate in an unstretched film made from the polyolefin resin having the given density, such that when the dye is included in the film, the unstretched film will exhibit a first color. Admixing the mechanochromic dye into a melt of the polyolefin resin. Forming a film from the admixture of the previous step. Wrapping an object using the film of the previous step, while stretching the film to a level where a change from the first color to a second color can be observed.
Abstract:
Materials are provided that combine a substrate with a dry film layer comprising an an active antimicrobial agent to provide materials suitable for the packaging of food products, such as meat products. In one aspect, the present invention provides material suitable for packaging that comprises (a) a substrate and (b) a dry film layer adjacent to the substrate comprising: (i) an active antimicrobial agent and (ii) a carrier, wherein the carrier is water soluble.
Abstract:
A container blow molded from a multilayer structure which comprises an inner product facing layer which comprises an ethylene-based polymer having a density equal to or less than 0.940 g/cc, a crystallinity of equal to or less than 62%, and Mz/Mn ratio equal to or less than 100, wherein the inner product facing layer has a small scale root mean square roughness of equal to or less than 40 nm and/or a large scale root mean square roughness of equal to or less than 500 nm is provided.
Abstract:
The instant invention is a sealant composition, method of producing the same, articles made therefrom, and method for forming such articles. The sealant composition according to the present invention comprises: (a) from 70 to 99.5 percent by weight of an ethylene/α-olefin interpolymer composition, based on the total weight of the sealant composition, wherein said ethylene/α-olefin interpolymer composition comprises an ethylene/α-olefin interpolymer, wherein ethylene/α-olefin interpolymer has a Comonomer Distribution Constant (CDC) in the range of from 15 to 250, and a density in the range of from 0.875 to 0.963 g/cm 3 , a melt index (I2) in a range of from 0.2 to 20 g/ 10 minutes, and long chain branching frequency in the range of from 0.02 to 3 long chain branches (LCB) per 1000C; (b) from 0.5 to 30 percent by weight of a propylene/α-olefin interpolymer composition, wherein said propylene/α-olefin interpolymer composition comprises a propylene/α-olefin copolymer or a propylene/ethylene/butene terpolymer, wherein said propylene/α-olefin copolymer has a crystallinity in the range of from 1 percent by weight to 30 percent by weight, a heat of fusion in the range of from 2 Joules/gram to 50 Joules/gram, and a DSC melting point in the range of 25° C to 110° C.
Abstract:
The present disclosure is directed to reclosable packages comprising a front wall, a rear wall, and a closure region proximate to an outer edge of the container opposite a bottom of the container. The closure region includes a plurality of seal regions forming a continuous seal between the front wall and the rear wall across a width of the package and at least one of the seal regions is nonlinear. The closure region further includes at least one unsealed region defined between the seal regions. In some reclosable packages, the application of an opening force proximate to the closure region is operable to break the continuous seal between the front wall and the rear wall across a width of the package. The seal geometry may be tuned to adjust the magnitude of opening force required.
Abstract:
The present disclosure provides a flexible container. In an embodiment, the flexible container includes (A) four panels, each panel formed from a flexible multilayer film. The flexible multilayer film is composed of one or more polymeric materials. The four panels form (i) a body, and (ii) a neck. The flexible container includes (B) a fitment. The fitment includes a top portion and a base. The base is composed of a polymeric material. The base is sealed in the neck. The flexible container includes (C) a sleeve and bag-on-valve assembly, or SBoV. The SBoV includes a valve seat, a bladder, and an elastic sleeve. (D) The bladder and the elastic sleeve are inserted through the fitment and are located in the body. (E) The valve seat is attached to the fitment.
Abstract:
The instant invention provides a polyethylene blend composition suitable for blown film, method of producing the same, and films made therefrom. The polyethylene blend composition suitable for blown film according to the present invention comprises the melt blending product of: (a) less than or equal to 4 percent by weight of a low density polyethylene (LDPE) having a density in the range of from 0.915 to 0.935 g/cm 3 , and a melt index (I 2 ) in the range of from greater than 0.8 to less than or equal to 5 g/10 minutes, and a molecular weight distribution (M w /M n ) in the range of from 6 to 10; (b) 90 percent or greater by weight of a heterogeneous linear low density polyethylene (hLLDPE) having a density in the range of from 0.917 to 0.950 g/cm 3 , and a melt index (I 2 ) in the range of from 0.1 to less than or equal to 5 g/10 minutes; (c) optionally a hydrotalcite based neutralizing agent; (d) optionally one or more nucleating agents; and (e) optionally one or more antioxidants. When the polyethylene blend-composition is formed into a film via blown film process, the output rate is improved at least 6 percent relative to a similar linear low density polyethylene.
Abstract:
The instant invention provides an ethylene/alpha-olefin interpolymer suitable for use in shrinkage film applications, and articles made therefrom. The ethylene/alpha-olefin interpolymer according to the present invention has a CDBI of less than 60%, and comprises at least two fractions in crossfractionation of the ethylene/alpha-olefin interpolymer, eluting from 85°C to 90°C and from 90°C to 95°C, comprising a weight fraction ratio of > 0.68 and a molecular weight homogeneity index of greater than 0.65; wherein the weight fraction ratio is the ratio of the weight of polymer in each fraction divided by the weight of polymer eluting between 95°C and 100°C and the molecular weight homogeneity index is the ratio of the weight average molecular weight of the polymer in the fraction divided by the weight average molecular weight of the polymer eluting between 95°C and 100°C, and wherein the ethylene/alpha-olefin interpolymer has a density in the range of 0.920 to 0.940 g/cm 3 .