公开(公告)号：US4387169A

公开(公告)日：1983-06-07

申请号：US415078

申请日：1982-09-07

申请人： Vincent S. Zabrocki ,  Marlin G. Bussey

发明人： Vincent S. Zabrocki ,  Marlin G. Bussey

IPC分类号： C08J9/00 ,  C08J9/14

CPC分类号： C08J9/0061 ,  B29C44/50 ,  C08J9/143 ,  C08J2323/06 ,  C08J2423/00 ,  Y10S264/05

摘要： Disclosed are low density foam planks of ethylenic polymers, which planks have a density of from about 0.8 to about 1.6 pounds per cubic foot, dimensional stability, substantially closed-cell structure, a cross-sectional area of at least six square inches and a minimum cross-sectional dimension of at least 0.5 inch. Such foam planks are made from polyethylene resins (e.g., low density polyethylene) by release to lower pressure of a flowable, foamable gel under pressure, e.g., by extrusion foaming, wherein the gel comprises at least one polyethylene resin and at least one volatile blowing agent. The process of making such foam planks is particularly characterized by the improvement wherein the flowable gel is mixed sufficiently to disperse the blowing agent in the gel to an amount from about 13.5 to 35.times.10.sup.4 moles per gram of the ethylenic polymer and such process is especially beneficial in that it enables the preparation of substantially closed-cell polyethylene foams having densities of from 0.8 to about 1.9 via extrusion foaming in conjunction with certain C.sub.2 -C.sub.4 fluorocarbon blowing agents.

摘要翻译： 公开了乙烯聚合物的低密度泡沫板，其厚度为约0.8至约1.6磅/立方英尺的密度，尺寸稳定性，基本上闭孔结构，至少六平方英寸的横截面积和最小值 截面尺寸至少为0.5英寸。 这样的泡沫板由聚乙烯树脂（例如低密度聚乙烯）制成，通过例如通过挤出发泡在压力下释放以降低可流动的可发泡凝胶的压力，其中凝胶包括至少一种聚乙烯树脂和至少一种挥发性吹塑 代理商 制造这种泡沫板的方法的特征在于其中将可流动凝胶充分混合以将凝胶中的发泡剂分散至每克乙烯类聚合物约13.5至35×10 4摩尔的量的改进，并且该方法特别有利于 它使得能够通过与某些C2-C4碳氟化合物发泡剂结合的挤出发泡来制备密度为0.8至约1.9的基本上闭孔的聚乙烯泡沫。

公开(公告)号：US4588650A

公开(公告)日：1986-05-13

申请号：US687689

申请日：1984-12-31

申请人： Bernard S. Mientus ,  William G. Fields ,  Marlin G. Bussey

发明人： Bernard S. Mientus ,  William G. Fields ,  Marlin G. Bussey

IPC分类号： C08J5/18 ,  C08L23/08 ,  C08L23/22 ,  C08L23/18 ,  B32B27/18 ,  B32B27/32

CPC分类号： C08J5/18 ,  C08L23/0815 ,  C08J2323/08 ,  C08J2323/16 ,  C08L23/22

摘要： Olefin polymer films composed essentially of a copolymer of a major proportion of ethylene with a minor proportion of a higher .alpha.-olefin monomer and an effective amount of a tackifying agent are provided which have unusually high Elmendorf tear strength in the machine direction, a good balance of machine direction to transverse direction Elmendorf tear strengths, and excellent cling properties. Such films are exceptionally well suited for use as a stretch/cling film in various packaging and palletizing applications.

摘要翻译： 提供基本上由主要比例的乙烯与较小比例的较高级α-烯烃单体和有效量的增粘剂组成的烯烃聚合物膜，其在机器方向上具有非常高的埃尔曼多夫撕裂强度，良好的平衡 机器方向横向Elmendorf撕裂强度，并具有优异的粘附性能。 这种膜非常适合用作各种包装和码垛应用中的拉伸/粘贴膜。

公开(公告)号：US4370378A

公开(公告)日：1983-01-25

申请号：US307567

申请日：1981-10-01

申请人： Vincent S. Zabrocki ,  Marlin G. Bussey

发明人： Vincent S. Zabrocki ,  Marlin G. Bussey

IPC分类号： C08J9/00 ,  C08J9/14 ,  B32B7/00 ,  C08F110/02

CPC分类号： C08J9/0061 ,  B29C44/50 ,  C08J9/143 ,  B29K2023/00 ,  C08J2323/06 ,  C08J2423/00 ,  Y10S264/05 ,  Y10T428/269

摘要： Disclosed are low density foam planks of ethylenic polymers, which planks have a density of from about 0.8 to about 1.6 pounds per cubic foot, dimensional stability, substantially closed-cell structure, a cross-sectional area of at least six square inches and a minimum cross-sectional dimension of at least 0.5 inch. Such foam planks are made from polyethylene resins (e.g., low density polyethylene) by release to lower pressure of a flowable, foamable gel under pressure, e.g., by extrusion foaming, wherein the gel comprises at least one polyethylene resin and at least one volatile blowing agent. The process of making such foam planks is particularly characterized by the improvement wherein the flowable gel is mixed sufficiently to disperse the blowing agent in the gel to an amount from about 13.5 to 35+10.sup.-4 moles per gram of the ethylenic polymer and such process is especially beneficial in that it enables the preparation of substantially closed-cell polyethylene foams having densities of from 0.8 to about 1.9 via extrusion foaming in conjunction with certain C.sub.2 -C.sub.4 fluorocarbon blowing agents.

摘要翻译： 公开了乙烯聚合物的低密度泡沫板，其厚度为约0.8至约1.6磅/立方英尺的密度，尺寸稳定性，基本上闭孔结构，至少六平方英寸的横截面积和最小值 截面尺寸至少为0.5英寸。 这样的泡沫板由聚乙烯树脂（例如低密度聚乙烯）制成，通过例如通过挤出发泡在压力下释放以降低可流动的可发泡凝胶的压力，其中凝胶包括至少一种聚乙烯树脂和至少一种挥发性吹塑 代理商 制造这种泡沫板的过程的特征在于其中将可流动凝胶充分混合以将凝胶中的发泡剂分散至每克乙烯类聚合物约13.5至35 + 10-4摩尔量的这种改进，并且这种方法 特别有益的是，其能够通过与某些C2-C4碳氟化合物发泡剂结合的挤出发泡来制备密度为0.8至约1.9的基本上闭孔的聚乙烯泡沫。