Polymer compositions and nonwoven compositions prepared therefrom

• Main Authors: MITCHELL CYNTHIA A, DHARMARAJAN NARAYANASWAMI RAJA, RICHESON GALEN C
• Format: Patent
• Language: Chinese; English
• Published: 13.06.2017
• Subjects: BRAIDING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; COTTON-WOOL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; KNITTING; LACE-MAKING; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; METALLURGY; NON-WOVEN FABRICS; ORGANIC MACROMOLECULAR COMPOUNDS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRIMMINGS; WADDING

Described herein are propylene-based polymer compositions that comprise a reactor blend of a first polymer component and a second polymer component. The first polymer component has an ethylene content of from greater than 12 to less than 19 wt% ethylene, and the second polymer component has an ethylene content of from greater than 4 to less than 10 wt% ethylene. Preferably, the ethylene content of the first and second polymer components satisfy the formula: -1.7143R1 + 29.771 <= R2 <=-1.9167R1 + 37.25. The propylene-based polymer compositions are particularly useful for forming meltspun nonwoven compositions that exhibit a desirable balance of retractive force and permanent set. 这里描述了包含第聚合物组分和第二聚合物组分的反应器共混物的基于丙烯的聚合物组合物。所述第聚合物组分具有大于12至小于19wt％乙烯的乙烯含量，所述第二聚合物组分具有大于4至小于10wt％乙烯的乙烯含量。优选地，所述第和第二聚合物组分的乙烯含量满足以下式：-1.7143R+29.771≤R≤-1.9167R+37.25。所述基于丙烯的聚合物组合物尤其可用于形成显示回缩力和永久变形的合乎需要的平衡的熔纺非织造组合物。