摘要:
The subject invention provides a film having at least one layer comprising an interpolymer of ethylene and at least on comonomer selected from the group consisting of C3-C20 α-olefins, dienes, and cycloalkenes, wherein the interpolymer is characterized as having a high degree of processability, good optical performance, and good mechanical properties. The subject invention further provides film fabrication processes and polymer compositions which are useful in preparing the subject films.
摘要:
Substantially linear olefin polymers having a melt flow ratio, I10/I2, ≧5.63, a molecular weight distribution, Mw/Mn, defined by the equation: Mw/Mn≦(I10/I2)−4.63, and a critical shear stress at onset of gross melt fracture of greater than about 4×106 dyne/cm2 and their method of manufacture are disclosed. The substantially linear olefin polymers preferably have at least about 0.01 long chain branches/1000 carbons and a molecular weight distribution from about 1.5 to about 2.5. The new polymers have improved processability over conventional olefin polymers and are useful in producing fabricated articles such as fibers, films, and molded parts.
摘要翻译:具有熔体流动比的基本上线性的烯烃聚合物,分子量分布,M / W / M, 由以下等式定义:由下式定义:M 1 / M 2 N 2 N 2/3) - 4.63,并且在大体积熔体断裂发生时的临界剪切应力大于约4×10 6达因/ cm 2和它们的制造方法是 披露 基本上线性的烯烃聚合物优选具有至少约0.01个长支链/ 1000个碳原子和约1.5至约2.5的分子量分布。 新聚合物相对于常规烯烃聚合物具有改进的加工性能,并且可用于制造诸如纤维,薄膜和模制件的制造制品。
摘要:
Elastic ethylene polymers are disclosed which have processability similar to highly branched low density polyethylene (LDPE), but the strength and toughness of linear low density polyethylene (LDPE). The polymers have processing indices (PI's) less than or equal to 70 percent of those of a comparative linear ethylene polymer and a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a traditional linear ethylene polymer at about the same I2and Mw/Mn. The novel polymers can also have from about 0.01 to about 3 long chain branches/1000 total carbons and have higher low/zero shear viscosity and lower high shear viscosity than comparative linear ethylene polymers. The novel polymers can also be characterized as having a melt flow ratio, I10/I2, ≧5.63, a molecular weight distribution, Mw/Mn, defined by the equation: Mw/Mn≦(I10/I2)−4.63, a critical shear stress at onset of gross melt fracture greater than about 4×106 dyne/cm2, and a single DSC melt peak between −30 C and 150 C.
摘要:
The present invention pertains to a substantially linear olefin polymer which has long chain branches, a high melt flow ratio, a narrow molecular weight distribution and critical shear rate at onset of surface melt fracture of a least 50 percent greater than the critical shear rate at the onset of melt fracture which is substantially higher than that of a linear olefin polymer having about the same molecular weight and molecular weight distribution. The novel polymer is an interpolymer of ethylene with at least one C3-C20 alpha-olefin and at least one unsaturated monomer.
摘要:
Fabricated articles made from formulated ethylene polymer compositions are disclosed. Films made from such formulated compositions have surprisingly good impact and tensile properties, and an especially good combination of modulus and toughness. The ethylene polymer compositions have at least one homogeneously branched substantially linear ethylene/.alpha.-olefin interpolymer and at least one heterogeneously branched ethylene polymer. The homogeneously branched substantially linear ethylene/.alpha.-olefin interpolymer has a density from about 0.89 to about 0.92 g/cm.sup.3 and a slope of strain hardening coefficient greater than or equal to about 1.3.
摘要翻译:公开了由配制的乙烯聚合物组合物制成的制品。 由这种配制的组合物制成的膜具有令人惊讶的良好的冲击和拉伸性能,以及模量和韧性的特别好的组合。 乙烯聚合物组合物具有至少一种均匀支化的基本上线性的乙烯/α-烯烃互聚物和至少一种非均匀支化的乙烯聚合物。 均匀支化的基本上线性的乙烯/α-烯烃互聚物的密度为约0.89至约0.92g / cm 3,应变硬化系数的斜率大于或等于约1.3。
摘要:
Fabricated articles made from formulated ethylene polymer compositions are disclosed. Films made from such formulated compositions have surprisingly good impact and tensile properties, and an especially good combination of modulus and toughness. The ethylene polymer compositions have at least one homogeneously branched substantially linear ethylene/.alpha.-olefin interpolymer and at least one heterogeneously branched ethylene polymer. The homogeneously branched substantially linear ethylene/.alpha.-olefin interpolymer has a density from about 0.89 to about 0.92 g/cm.sup.3 and a slope of strain hardening coefficient greater than or equal to about 1.3.
摘要翻译:公开了由配制的乙烯聚合物组合物制成的制品。 由这种配制的组合物制成的膜具有令人惊讶的良好的冲击和拉伸性能,以及模量和韧性的特别好的组合。 乙烯聚合物组合物具有至少一种均匀支化的基本上线性的乙烯/α-烯烃互聚物和至少一种非均匀支化的乙烯聚合物。 均匀支化的基本上线性的乙烯/α-烯烃互聚物的密度为约0.89至约0.92g / cm 3,应变硬化系数的斜率大于或等于约1.3。
摘要:
A process and thermoplastic composition for high line speed extrusion without high neck-in and draw resonance are disclosed. The thermoplastic composition is made of at least one ethylene polymer having a Dow Rheology Index (DRI) of at least 0.1 or, alternately, at least one substantially linear ethylene polymer, used alone or in combination with at least one high-pressure ethylene polymer and/or with at least one heterogeneous linear olefin polymer.
摘要:
Substantially linear olefin polymers having a melt flow ratio I.sub.10 /I.sub.2,.gtoreq.5.63, a molecular weight distribution, M.sub.w /M.sub.n, defined by the equation: M.sub.w /M.sub.n .ltoreq.(I.sub.10 /I.sub.2)-4.63, and a critical shear stress at onset of gross melt fracture of greater than about 4.times.10.sup.6 dyne/cm.sup.2 and their method of manufacture are disclosed. The substantially linear olefin polymers preferably have at least about 0.01 long chain branches/1000 carbons and a molecular weight distribution from about 1.5 to about 2.5. The new polymers have improved processability over conventional olefin polymers and are useful in producing fabricated articles such as fibers, films, and molded parts.
摘要:
A fiber is obtainable from or comprises a blend of a propylene based polymer and an ethylene/α-olefin interpolymer characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle and a density, d, in grams/cubic centimeter, wherein the elastic recovery and the density satisfy the following relationship: Re>1481−1629(d). Such interpolymer can also be characterized by other properties. The fibers made therefrom have a relatively high elastic recovery and a relatively low coefficient of friction. The fibers can be cross-linked, if desired. Woven, knitted or non-woven fabrics can be made from such fibers.
摘要:
A microwave-sensitive thermoplastic composition that includes a microwave-receptive additive; and a thermoplastic polymer; wherein the microwave-receptive additive is selected from the group consisting of sepiolite clay, molecular sieves formed from ammonium ion salts or hydrogen ion salts, aluminophosphates, silicoaluminophasphates, silicotitanates, organo-modified clays, molecular sieves or zeolites having a caged organic microwave receptive material, and combinations thereof.