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Extrusion of highly filled flexible polymer sheet
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2020-08-25 , DOI: 10.1002/pen.25509 Shruti Deshmukh 1 , Stephen Burbine 1 , Erin Keaney 1 , Shib Shankar Banerjee 1 , Artee Panwar 1 , Christopher Peters 2 , Mary Herndon 2 , Derrick Rockosi 2 , Joey Mead 1 , Carol Barry 1
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2020-08-25 , DOI: 10.1002/pen.25509 Shruti Deshmukh 1 , Stephen Burbine 1 , Erin Keaney 1 , Shib Shankar Banerjee 1 , Artee Panwar 1 , Christopher Peters 2 , Mary Herndon 2 , Derrick Rockosi 2 , Joey Mead 1 , Carol Barry 1
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Highly‐filled polymer systems include color masterbatches, feedstocks for powder injection molding, and rigid sheets with high levels of flame retardants, but they have not been explored for flexible sheet. This work investigated the (a) selecting a polymer matrix with enough melt strength and flexibility to form a stable sheet with high filler loading, (b) the maximum achievable filler loading for the sheet, and (c) optimizing the process of extruding a highly‐filled flexible polymer system. Extrusion grade low‐density polyethylene (LDPE) provided sufficient flexibility and permitted a maximum filler loading of 36 vol% (~78 wt%). Good dispersion of the nanoparticle filler, however, required two passes through multiple screw extruders and a small reduction in the viscosity of the LDPE. Sheet with thickness of 415 μm, surface roughness of <1 μm, and sufficient flexibility was extruded continuously at a rate of 10 m/min., but it required a more traditional coat hanger manifold to prevent filler hang up in the sheet die. The filler particles were distributed uniformly through the core and skin of the sheet, giving the sheet good mechanical properties.
中文翻译：
高填充柔性聚合物片材的挤出
高度填充的聚合物系统包括色母粒，用于粉末注射成型的原料以及具有高阻燃剂含量的硬质片材，但尚未开发出用于柔性片材的材料。这项工作研究了（a）选择具有足够的熔体强度和柔韧性的聚合物基体，以形成具有高填料填充量的稳定片材；（b）片材可达到的最大填料填充量；以及（c）优化挤出高强度填料的工艺填充的柔性聚合物系统。挤出级低密度聚乙烯（LDPE）具有足够的柔韧性，最大填充量为36 vol％（〜78 wt％）。但是，纳米颗粒填料的良好分散性需要两次通过多个螺杆挤出机，并且LDPE的粘度略有降低。厚度为415μm，表面粗糙度<1μm的板材 并以10 m / min。的速度连续挤出足够的柔韧性，但它需要更传统的衣架歧管以防止填料在板模中挂起。填料颗粒均匀地分布在薄板的芯和表皮上，赋予薄板良好的机械性能。
更新日期：2020-08-25
中文翻译：
高填充柔性聚合物片材的挤出
高度填充的聚合物系统包括色母粒，用于粉末注射成型的原料以及具有高阻燃剂含量的硬质片材，但尚未开发出用于柔性片材的材料。这项工作研究了（a）选择具有足够的熔体强度和柔韧性的聚合物基体，以形成具有高填料填充量的稳定片材；（b）片材可达到的最大填料填充量；以及（c）优化挤出高强度填料的工艺填充的柔性聚合物系统。挤出级低密度聚乙烯（LDPE）具有足够的柔韧性，最大填充量为36 vol％（〜78 wt％）。但是，纳米颗粒填料的良好分散性需要两次通过多个螺杆挤出机，并且LDPE的粘度略有降低。厚度为415μm，表面粗糙度<1μm的板材 并以10 m / min。的速度连续挤出足够的柔韧性，但它需要更传统的衣架歧管以防止填料在板模中挂起。填料颗粒均匀地分布在薄板的芯和表皮上，赋予薄板良好的机械性能。
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