CN103890079A - 用于一种绝缘容器的聚合物材料 - Google Patents
用于一种绝缘容器的聚合物材料 Download PDFInfo
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- CN103890079A CN103890079A CN201280051426.9A CN201280051426A CN103890079A CN 103890079 A CN103890079 A CN 103890079A CN 201280051426 A CN201280051426 A CN 201280051426A CN 103890079 A CN103890079 A CN 103890079A
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Abstract
一种配制品包括聚合物材料、成核剂、发泡剂、以及表面活性剂。该配制品可以用于形成一种容器。
Description
优先权要求
本申请根据35U.S.C.§119(e)要求美国临时申请序列号61/529,632(2011年8月31日提交)以及序列号61/618,604(2012年3月30日提交)的优先权,它们通过引用清楚地结合在此。
背景技术
本披露涉及可以经过成形加工以产生一种容器的聚合物材料,并且具体地,进行绝缘的聚合物材料。更具体地说,本披露涉及基于聚合物的配制品,这些配制品可以经过成形加工以产生一种绝缘的非芳香族聚合物材料。
概述
根据本披露的一种聚合物材料包括一种聚合物树脂和多种泡孔形成剂。在示意性实施例中,挤出或以另外的方式成形加工一种聚合物树脂和泡孔形成剂的共混物以便产生一种绝缘的泡孔式非芳香族聚合物材料。
在示意性实施例中,根据本披露所产生的一种绝缘性泡孔式非芳香族聚合物材料可以经过成形加工以产生一种绝缘杯或其他的产品。在示意性实施例中,聚丙烯树脂用于形成该绝缘性泡孔式非芳香族聚合物材料。
在示意性实施例中,一种绝缘性泡孔式非芳香族聚合物材料包括一种具有高熔体强度的聚丙烯基础树脂、一种聚丙烯共聚物或均聚物(或二者)、以及包括至少一种成核剂和一种发泡剂(例如二氧化碳)的泡孔形成剂。在示意性实施例中,该绝缘性泡孔式非芳香族聚合物材料进一步包括一种增滑剂。该聚丙烯基础树脂具有宽分布的单峰的(非双峰的)分子量分布。
在示意性实施例中,对根据本披露的一种基于聚丙烯的配制品进行加热并且在两个阶段中进行挤出以便产生一种管状挤出物(在挤出方法中),可以将该管状挤出物切开以便提供一种绝缘性泡孔式非芳香族聚合物材料的条带。在示意性实施例中,将呈惰性气体形式的一种发泡剂在该第一挤出阶段中引入一种熔融树脂中。
在示意性实施例中,使用该绝缘性泡孔式非芳香族聚合物材料的条带形成一种绝缘杯。该绝缘杯包括一个具有套筒状侧壁的主体和一个底部,该底部联接到该主体上以便与该侧壁相配合来形成一个用于存储食物、液体、或任何适合的产品的内部区域。该主体还包括一个与该侧壁的上端联接的卷边以及一个与该侧壁的下端以及该底部联接的底部支架。
根据本披露配置该绝缘性泡孔式非芳香族聚合物材料以便提供用于能够在该主体的至少一个所选择的区域(例如,侧壁、卷边、底部支架、以及包括在该底部支架内的固定底部的凸缘)内实现局部塑性变形的手段,从而提供(1)一个塑性变形的第一材料区段,该第一材料区段在该主体的所选择区域的一个第一部分中具有第一密度,以及(2)一个第二材料区段,该第二材料区段在该主体的所选择区域的一个相邻的第二部分中具有相对较低的第二密度。在示意性实施例中,该第一材料区段比该第二材料区段更薄。
考虑了对如目前视为实施本披露的最佳方式进行举例说明的示意性实施例后,本披露的其他特征对于本领域普通技术人员将变得很清楚。
附图简要说明
本详细说明具体指的是以下附图,其中:
图1是一种根据本披露的材料形成法的图解透视图,该图示出:该材料形成法包括,从左到右,将绝缘性泡孔式非芳香族聚合物材料的配制品放入一个料斗,将其进料到一个第一挤出机的第一挤出区中(在此处施加热和压力以便形成熔融树脂),并且示出将一种发泡剂注入该熔融树脂中以便形成一种挤出树脂混合物,将该挤出树脂混合物进料到一个第二挤出机的第二挤出区中,在该第二挤出区,该挤出树脂混合物排出并且膨胀以便形成一种挤出物,切割该挤出物以便形成一种绝缘性泡孔式非芳香族聚合物材料的条带;
图2是一种绝缘杯的透视图,该绝缘杯是由一种包括图1的绝缘性泡孔式非芳香族聚合物材料的材料条带制成,该图示出:该绝缘杯包括一个主体和一个底部,并且示出该主体的四个区域已经被分离以便揭示局部塑性变形区域,塑性变形在维持该主体内预定的绝缘特性的同时在那些区域中提供增加的密度;
图3是包括在图2的绝缘杯的主体内的一个侧壁的一部分的放大截面图,该图示出该侧壁由一种薄片制成,该薄片包括,从左到右,一个包括薄膜的表层、一个墨水层、以及一个粘合剂层,以及图1的绝缘性泡孔式非芳香族聚合物材料的条带;
图4是图2的绝缘杯的分解组装图,该图示出该绝缘杯包括,从上到下,底部和主体,该主体包括一个卷边、侧壁、以及配置成使该底部与该侧壁相互连接的底部支架,如图2中所示;
图5是沿着图2的线5-5截取的截面图,该图示出包括在该绝缘杯的主体内的侧壁包括一个总体上均匀的厚度并且示出该底部与包括在该主体内的该底部支架相联接;
图6-9是一系列视图,这些图示出图2的绝缘杯的第一、第二、第三、和第四区域,这些区域的每一个都包括局部塑性变形;
图6是沿着图2的线5-5截取的部分截面图,该图示出该第一区域是在该主体的侧壁内;
图7是沿着图2的线5-5截取的部分截面图,该图示出该第二区域是在该主体的卷边内;
图8是沿着图2的线5-5截取的部分截面图,该图示出该第三区域是在包括在该主体的底部支架内的一个连接腹板内;
图9是沿着图2的线5-5截取的部分截面图,该图示出该第四区域是在包括在该主体的底部支架内的一个腹板支撑环内;以及
图10是一个曲线图,该图示出根据本披露的绝缘杯经受温度测试时随时间推移的性能。
详细说明
一种根据本披露产生的绝缘性泡孔式非芳香族聚合物材料可以经过成形加工以产生一种如图2-9中所示的绝缘杯10。作为一个实例,该绝缘性泡孔式非芳香族聚合物材料包括一种具有高熔体强度的聚丙烯基础树脂、一种聚丙烯共聚物或均聚物(或二者)、以及包括至少一种成核剂和一种发泡剂(例如二氧化碳)的泡孔形成剂。作为一个另外的实例,该绝缘性泡孔式非芳香族聚合物材料进一步包括一种增滑剂。该聚丙烯基础树脂具有宽分布的单峰的(非双峰的)分子量分布。
一种材料形成法100使用一种根据本披露的基于聚丙烯的配制品121来产生一种绝缘性泡孔式非芳香族聚合物材料条带82,如图1中所示。加热并且在两阶段中挤出配制品121以便产生一种管状挤出物124,可以切开该管状挤出物以便提供绝缘性泡孔式非芳香族聚合物材料的条带82,例如像在图1中所展示。将呈液化的惰性气体形式的一种发泡剂在该第一挤出区中引入一种熔融树脂122中。
绝缘性泡孔式非芳香族聚合物材料用于形成绝缘杯10。绝缘杯10包括一个主体11,该主体具有一个套筒状侧壁18和一个底部20,如图2和4中所示。将底部20联接到主体11并且与侧壁18配合以便在其间形成一个内部区域14用于存储食物、液体、或任何适合的产品。主体11还包括一个与侧壁18的上端联接的卷边16和一个与侧壁18的下端以及底部20联接的底部支架17,如图5中所示。
根据本披露配置绝缘性泡孔式非芳香族聚合物材料以便提供用于能够在主体11的至少一个所选择的区域(例如,侧壁18、卷边16、底部支架17、以及包括在底部支架17内的固定底部的凸缘26)内实现局部塑性变形的方式,以便提供(1)一个塑性变形的第一材料区段,该第一材料区段在主体11的所选择区域的一个第一部分中具有第一密度,以及(2)一个第二材料区段,该第二材料区段在主体11的所选择区域的一个相邻的第二部分中具有相对较低的第二密度,例如像在图2和6-9中所示。在示意性实施例中,该第一材料区段比该第二材料区段薄。
本披露的一个方面提供一种配制品用于制备绝缘性泡孔式非芳香族聚合物材料。如本文所提及,一种绝缘性泡孔式非芳香族聚合物材料指的是一种挤出结构,该挤出结构具有于其中形成的泡孔并且在给定的厚度下具有所希望的绝缘特性。本披露的另一个方面提供用于制备绝缘性泡孔式非芳香族聚合物材料的挤出结构的一种树脂材料。本披露的还另一个方面提供一种包括绝缘性泡孔式非芳香族聚合物材料的挤出物。本披露的又另一个方面提供一种材料结构,该结构由一种绝缘性泡孔式非芳香族聚合物材料形成。本披露的一个另外的方面提供一种容器,该容器由一种绝缘性泡孔式非芳香族聚合物材料形成。
在示例性实施例中,一种配制品包括至少一种聚合物材料。在一个示例性实施例中,一种主要的或基础聚合物包括具有长链支化的高熔体强度聚丙烯。长链支化通过用该聚合物的另一个共价键合的链,或在一种接枝共聚物的情况下,用另一种类型的链置换单体亚单元上的一个取代基(例如氢原子)而发生。例如,聚合反应期间的链转移反应会引起聚合物的支化。长链支化是使聚合物侧链长度比线性聚合物链的平均临界缠结距离更长的支化。长链支化总体上理解为包括具有至少20个碳原子的聚合物链,这取决于用于聚合的具体单体结构。支化的另一个实例是在聚合反应完成后通过使聚合物交联实现。一些长支链聚合物是在没有交联的情况下形成的。聚合物链支化可以对材料特性具有显著的影响。聚丙烯材料的最终选择可能将最终材料的特性、配制期间所需要的附加材料、以及挤出过程期间的条件考虑在内。在示例性实施例中,高熔体强度聚丙烯可以是能容纳一种气体(如下文所讨论)、产生所希望的泡孔尺寸、具有所希望的表面平滑度并且具有可接受的异味水平(如果有的话)的材料。
一种适合的聚丙烯基础树脂的一个示意性实例是DAPLOYTMWB140均聚物(可购自波利亚里斯公司(Borealis A/S)),一种高熔体强度结构同分异构改性的聚丙烯均聚物(熔体强度=36(如根据通过引用结合在此的ISO16790所测试),熔化温度=325.4°F(163℃)(使用通过引用结合在此的ISO11357))。
波利亚里斯DAPLOYTMWB140特性(如在波利亚里斯产品手册中所述):
具有适合熔体强度、支化、以及熔化温度的其他聚丙烯聚合物也可以使用。可以使用若干基础树脂并且将其混合在一起。
在某些示例性实施例中,一种次要聚合物可以与该基础聚合物一起使用。该次要聚合物可以是,例如,一种具有足够结晶度的聚合物。在示例性实施例中,该次要聚合物可以是至少一种结晶的聚丙烯均聚物、一种抗冲共聚物、其混合物或类似物。一个示意性实例是一种高结晶聚丙烯均聚物(作为F020HC可购自布拉斯科公司(Braskem))。另一个示意性实例是一种作为PRO-FAX SC204TM可商购的聚合物(可购自利安德巴塞尔工业控股公司(LyndellBasell Industries Holdings,B.V.))。另一个示意性实例包括可购自布拉斯科公司的Homo PP-INSPIRE222。在一个方面中,聚丙烯在10℃/分冷却速率下可以具有高的结晶度,即,结晶相的含量超过51%(如使用差示扫描量热法所测试)。在示例性实施例中,可以使用若干不同的次要聚合物并且将其混合在一起。
在示例性实施例中,该次要聚合物可以是或可以包括聚乙烯。在示例性实施例中,该次要聚合物可以包括低密度聚乙烯、线性低密度聚乙烯、高密度聚乙烯、乙烯-乙酸乙烯酯共聚物、乙烯-丙烯酸乙酯共聚物、乙烯-丙烯酸共聚物、至少两种上述物质的混合物以及类似物。如下文进一步所讨论,使用非聚丙烯材料可能影响可回收性、绝缘性、可微波性、抗冲击性、或其他特性。
一种或多种成核剂用于提供和控制成核点以便促进在挤出过程期间在熔融树脂中形成泡孔、气泡、或空隙。成核剂指的是一种化学或物理材料,这种材料在熔融树脂混合物中提供用于泡孔形成的位点。成核剂可以是物理试剂或化学试剂。适合的物理成核剂具有所希望的粒度、纵横比、以及上端截止(top-cut)特性。实例包括(但不限于)滑石、CaCO3、云母、以及至少两种上述物质的混合物。成核剂可以与引入料斗中的聚合物树脂配制品共混。可替代地,可以将该成核剂加入挤出机中的熔融树脂混合物中。当达到化学反应温度时,该成核剂起作用使气泡能够形成,从而在熔融树脂中形成泡孔。一种化学发泡剂的示意性实例是柠檬酸或一种基于柠檬酸的材料。在分解后,该化学发泡剂形成小的气泡,这些小气泡进一步充当用于从物理或其他类型发泡剂生长成更大泡孔的成核点。一个代表性实例是HydrocerolTMCF-40ETM(可购自科莱恩公司(Clariant Corporation)),它含有柠檬酸和一种晶体成核剂。在示意性实施例中,可以添加一种或多种催化剂或其他反应剂以便加快或促进泡孔形成。
在某些示例性实施例中,可以结合一种或多种发泡剂。发泡剂指的是一种起作用以使成核点膨胀的物理或化学材料(或材料的组合)。成核剂和发泡剂可以一起起作用。发泡剂通过在熔融树脂中形成泡孔起作用来减小密度。可以将发泡剂加入挤出机中的熔融树脂混合物中。物理发泡剂的代表性实例包括(但不限于)二氧化碳、氮气、氦气、氩气、空气、戊烷、丁烷、或上述物质的其他烷烃混合物以及类似物。在某些示例性实施例中,可以使用提高物理发泡剂溶解度的一种加工助剂。可替代地,该物理发泡剂可以是一种氢氟烃,例如1,1,1,2-四氟乙烷(也称为R134a),或其他卤代烷制冷剂。发泡剂的选择可以将环境影响考虑在内来进行。
在示例性实施例中,物理发泡剂典型地是气体,这些气体在压力下以液体形式通过如图1中所示的挤出机中的一个端口引入熔融树脂中。随着该熔融树脂穿过挤出机以及模头,压力降低,从而导致该物理发泡剂从液相变为气相,由此在挤出的树脂中形成泡孔。在挤出后过量气体喷出,而其余气体截留在挤出物的泡孔中。
化学发泡剂是降解或反应以产生一种气体的材料。化学发泡剂可以是吸热的或放热的。化学发泡剂典型地在特定温度下降解以便分解并且释放气体。在一个方面中,该化学发泡剂可以是一种或多种选自下组的材料,该组由以下各项组成:偶氮二甲酰胺、偶氮二异丁腈、苯磺酰肼(benzenesulfonhydrazide)、4,4-苯酚磺酰基氨基脲、p-甲苯磺酰基氨基脲、偶氮二羧酸钡、N,N’-二甲基-N,N’-二亚硝基对苯二甲酰胺、三肼基三嗪、甲烷、乙烷、丙烷、正丁烷、异丁烷、正戊烷、异戊烷、新戊烷、氟代甲烷、全氟甲烷、氟乙烷、1,1-二氟乙烷、1,1,1-三氟乙烷、1,1,1,2-四氟-乙烷、五氟乙烷、全氟乙烷、2,2-二氟丙烷、1,1,1-三氟丙烷、全氟丙烷、全氟丁烷、全氟环丁烷、氯甲烷、二氯甲烷、氯乙烷、1,1,1-三氯乙烷、1,1-二氯-1-氟乙烷、1-氯-1,1-二氟乙烷、1,1-二氯-2,2,2-三氟乙烷、1-氯-1,2,2,2-四氟乙烷、三氯一氟甲烷、二氯二氟甲烷、三氯三氟乙烷、二氯四氟乙烷、氯七氟丙烷、二氯六氟丙烷、甲醇、乙醇、正丙醇、异丙醇、碳酸氢钠、碳酸钠、碳酸氢铵、碳酸铵、亚硝酸铵、N,N’-二甲基-N,N’-二亚硝基对苯二甲酰胺、N,N’-二亚硝基五亚甲基四胺、偶氮二甲酰胺、偶氮二异丁腈(azobisisobutylonitrile)、偶氮环己腈、偶氮二氨基苯、偶氮二羧酸钡、苯磺酰肼、甲苯磺酰肼、p,p’-氧基双(苯磺酰肼)、二苯砜-3,3’-二磺酰肼、叠氮化钙、4,4’-二苯基二磺酰基叠氮化物、以及p-甲苯磺酰基叠氮化物。
在本披露的一个方面中,当使用一种化学发泡剂时,该化学发泡剂可以被引入到加入料斗的树脂配制品中。
在本披露的一个方面中,该发泡剂可以是一种在分解时形成气体的可分解材料。此类材料的一个代表性实例是柠檬酸或一种基于柠檬酸的材料。在本披露的一个示例性方面中,可能的是使用一种物理发泡剂和化学发泡剂的混合物。
在本披露的一个方面中,可以将至少一种增滑剂结合进树脂混合物中以便有助于提高生产速率。增滑剂(也称为加工助剂)是用于描述加入树脂混合物中并且在转化期间和转化后对聚合物提供表面润滑的一般类型材料的术语。增滑剂还可以减少或消除模头流涎(die drool)。增滑剂材料的代表性实例包括脂肪或脂肪酸的酰胺,例如(但不限于)芥酸酰胺以及油酰胺。在一个示例性方面中,可以使用从油酰胺(单不饱和C-18)至芥酸酰胺(C-22单不饱和)。增滑剂材料的其他代表性实例包括低分子量酰胺和含氟弹性体。可以使用两种或更多种增滑剂的组合。增滑剂可以一种母料颗粒的形式提供并且与树脂配制品共混。
可以任选地结合一种或多种附加组分和添加剂,例如(但不限于)抗冲击改性剂、着色剂(例如但不限于二氧化钛)、以及化合物回收料。
可以将聚合物树脂与任何附加的所希望的组分共混并且熔化以便形成一种树脂配制品混合物。
除了表面形貌和形态之外,发现有益于获得一种无褶皱的高品质绝缘杯的另一个因素是绝缘性泡孔式非芳香族聚合物条带的各向异性。纵横比是泡孔的长轴与短轴的比率。如通过显微术所证实,在一个示例性实施例中,一种绝缘性泡孔式非芳香族聚合物材料的挤出条带82在机器方向67(机器或沿着腹板方向)上的平均泡孔尺寸是约0.0362英寸(0.92mm)宽×约0.0106英寸(0.27mm)高。因此,机器方向泡孔尺寸纵横比是约3.5。横方向(横跨腹板或横向方向)上的平均泡孔尺寸是约0.0205英寸(0.52mm)宽和约0.0106英寸(0.27mm)高。因此,横方向纵横比是1.94。在一个示例性实施例中,发现对于在杯子形成期间承受压缩力的条带,泡孔的一个所希望的平均纵横比是在约1.0与约3.0之间。在一个示例性实施例中,泡孔的一个所希望的平均纵横比是在约1.0与约2.0之间。
机器方向与横方向泡孔长度的比率用作挤出条带各向异性的度量。在示例性实施例中,一种绝缘性泡孔式非芳香族聚合物材料的条带可以是双轴取向的,其中各向异性系数在约1.5与约3之间的范围内。在一个示例性实施例中,各向异性系数是约1.8。
如果杯子的圆周与挤出条带82的机器方向67对准,当泡孔纵横比超过约3.0时,典型地在该杯子的内表面上形成具有超过约200微米深度的深褶皱,从而使得杯子不可用。出乎意料地,在一个示例性实施例中发现,如果杯子的圆周在挤出条带82(其特征可以为低于约2.0的泡孔纵横比)的横方向上对准,在该杯子的内部没有形成深褶皱,这指示挤出条带82的横方向在杯子形成期间更抗压缩力。
其中泡孔在杯圆周方向(例如在横方向)上具有低于约2.0纵横比的挤出条带压缩性较大的一个可能原因可归因于具有较大半径的泡孔的较低应力密度。另一个可能原因可能是泡孔的较大纵横比可能意味着泡孔壁的较大的细长比,细长比与压曲强度成反比。在压缩模式中折叠条带产生折皱可近似为泡孔壁的压曲。对于具有更长长度的泡孔壁,细长比(长度比直径)可以更大。减轻压缩应力方面的又另一个可能因素可能是在横方向上的泡孔壁中更有利的聚合物链填充,从而使聚合物链在压缩力下重排。预期聚合物链优选地在机器方向67上取向且更紧密填充。
在示例性实施例中,所形成的杯圆周沿着挤出条带方向对准的组合,泡孔纵横比低于约2.0。因此,具有面向杯内部的低于约100埃晶畴尺寸的挤出条带表面可以提供的有利结果为实现具有小于约5微米深缺陷的所希望的表面形貌。
在本披露的一个方面中,聚丙烯树脂(基础树脂或者所组合的基础树脂与次要树脂)可能具有在约0.01g/cm3至约0.19g/cm3范围内的密度。在一个示例性实施例中,该密度可能在约0.05g/cm3至约0.19g/cm3的范围内。在一个示例性实施例中,该密度可能在约0.1g/cm3至约0.185g/cm3的范围内。
在一个可替代示例性实施例中,可以使用聚乳酸材料代替聚丙烯作为主要聚合物,例如(但不限于)一种衍生自基于食物的材料(例如玉米淀粉)的聚乳酸材料。在一个示例性实施例中,聚乙烯可以用作主要聚合物。
在本披露的一个示例性方面中,用于在形成绝缘性泡孔式非芳香族聚合物材料中有用的材料的一种配制品包括以下各项:至少一种主要树脂(包括一种高熔体强度长链支化的聚丙烯)、至少一种次要树脂(包括一种高结晶聚丙烯均聚物或一种抗冲共聚物)、至少一种成核剂、至少一种发泡剂以及至少一种增滑剂。任选地,可以结合一种着色剂。
可以经由一个料斗将该配制品引入挤出机中,例如图1中所示的那个。在挤出过程期间,加热并且使该配制品熔化以便形成一种熔融树脂混合物。在示例性实施例中,将至少一种物理发泡剂经由挤出机中的一个或多个端口引入该熔融树脂混合物中。然后使该熔融树脂混合物以及气体穿过一个模口挤出。
在另一个示例性实施例中,该配制品可以含有至少一种化学发泡剂以及至少一种物理发泡剂二者。
可以根据常规设备以及方法由该薄片形成杯子或其他容器或结构。
仅出于非限制性说明的目的,将描述从本文中所披露的材料的一个示例性实施例形成杯子;然而,该容器可以处于多种可能的形状或结构的任一种或用于多种应用,例如(但不限于)常规饮料杯、存储容器、瓶子或类似物。仅出于非限制性说明的目的,一种液体饮料将用作可以由该容器所容纳的材料;然而,该容器可以盛放液体、固体、凝胶、其组合、或其他材料。
一种材料形成法100示于例如图1中。如图1中所示,材料形成法100将一种非芳香族聚合物材料挤出成一种绝缘性泡孔式非芳香族聚合物材料的薄片或条带82。作为一个实例,材料形成法100使用一种串联挤出技术,其中一个第一挤出机111及一个第二挤出机112配合以便挤出绝缘性泡孔式非芳香族聚合物材料的条带82。
如图1中所示,将一种绝缘性泡孔式非芳香族聚合物材料82的配制品121装入一个与第一挤出机111联接的料斗113中。配制品121可以呈丸粒、颗粒片(granular flake)、粉末、或其他合适形式。通过第一挤出机111中所包括的一个螺杆114将绝缘性泡孔式非芳香族聚合物材料的配制品121从料斗113移动。如图1中所示,在第一挤出机111的一个第一挤出区中通过施加热105及来自螺杆114的压力使配制品121转化成一种熔融树脂122。在示例性实施例中,可以在熔融树脂122形成后将一种物理发泡剂115引入并且混入熔融树脂122中。在示例性实施例中,如本文中进一步所讨论,该物理发泡剂可以为一种气体,将该气体以一种加压液体的形式经由端口115A引入并且与熔融树脂122混合以便形成一种熔融挤出树脂混合物123,如图1中所示。
如图1中所示,挤出树脂混合物123通过螺杆114输送至第二挤出机112中所包括的一个第二挤出区中。在此,由第二挤出机112进一步加工挤出树脂混合物123,随后穿过一个与第二挤出机112的一端联接的挤出模具116排出,以便形成一种挤出物124。随着挤出树脂混合物123穿过挤出模口116,气体115由挤出树脂混合物123中的溶液出来并且开始形成泡孔并膨胀,以便形成挤出物124。如图1中所示的一个示例性实施例,该挤出物124可以通过一个环形挤出模口116来形成以便形成一种管状挤出物。如图1中所示,一个纵割机117接着切割挤出物124以便形成一种绝缘性泡孔式非芳香族聚合物材料的薄片或条带82。
挤出物指的是退出一个挤出模口的物质。该挤出物物质可以呈一种形式,例如(但不限于)薄片、条带、管、细线、丸粒、颗粒或如本文所述的基于聚合物的配制品挤出穿过一个挤出机模口所造成的其他结构。仅出于说明的目的,作为可以形成的一种代表性挤出物结构可以提及薄片,但旨在包括本文中所讨论的这些结构。挤出物可以进一步形成为多种最终产物的任一种,例如(但不限于):杯子、容器、托盘、包裹物、绝缘性泡孔式非芳香族聚合物材料条带的卷筒、或类似物。
作为一个实例,卷绕绝缘性泡孔式非芳香族聚合物材料的条带82以便形成一个绝缘性泡孔式非芳香族聚合物材料的卷并且存储用于随后在一种杯成形法中使用。然而,有待根据该杯成形法使用的绝缘性泡孔式非芳香族聚合物材料的条带82是在本披露的范围内。在一个示意性实例中,将绝缘性泡孔式非芳香族聚合物材料的条带82与一个具有薄膜及印刷于该薄膜上的墨水层的表层一起层压以便得到高品质图形。
如图2和3中所示,使用一种绝缘性泡孔式非芳香族聚合物材料的条带82形成绝缘杯10。例如,绝缘杯10包括一个具有套筒状侧壁18的主体11和一个底部20,该底部联接到主体11上以便与该侧壁18相配合来形成一个用于存储食物、液体、或任何适合的产品的内部区域14,如图2中所示。主体11还包括一个与侧壁18的上端联接的卷边16和一个与侧壁18的下端以及底部20联接的底部支架17,如图2和7中所展示。
主体11由如本文中所披露的绝缘性泡孔式非芳香族聚合物材料的条带82形成。根据本披露,绝缘性泡孔式非芳香族聚合物材料的条带82经由施加压力及热(但在示例性实施例中,配置可能在不施加热下进行)配置为提供能够在主体11的至少一个所选择区域中实现局部塑性变形的手段,以便在不使绝缘性泡孔式非芳香族聚合物材料薄片破裂的情况下提供位于主体11的所选择区域的一个第一部分中具有一个第一密度的塑性变形的第一薄片区段以及位于主体11的所选择区域的一个相邻第二部分中具有低于该第一密度的一个第二密度的第二薄片区段,这样使得在主体11中维持预定的绝缘特征。
如图2、5以及6中所示,其中能够通过绝缘性泡孔式非芳香族聚合物材料实现局部塑性变形的主体11的所选择区域的一个第一区域101是在套筒状侧壁18中。如图2、5以及6中所示,套筒状侧壁18包括一个立式内部接片514、立式外部接片512以及立式围篱513。立式内部接片514安排为自底部20向上延伸并且配置为提供主体11的所选择区域中的该第一区域101中具有该第一密度的该第一薄片区段。如图6中所示,立式外部接片512安排为自底部20向上延伸并且沿着立式外部接片512与立式内部接片514之间的界面I与立式内部接片514配对。立式围篱513安排为使立式内部接片514及立式外部接片512与周围内部区域14互连。如图2-5中所示,立式围篱513配置为提供主体11的所选择区域中的该第一区域101中具有该第二密度的该第二薄片区段,并且与立式内部接片514以及立式外部接片512配合以便形成套筒状侧壁18。
如图2、4、5以及7中所示,其中能够通过绝缘性泡孔式非芳香族聚合物材料的薄片实现局部塑性变形的主体11的所选择区域中的一个第二区域102是在主体11所包括的卷边16中。卷边16与套筒状侧壁18的上端联接以便与底部20处于间隔开的关系并且框出进入内部区域14的一个开口。如图2、4、5以及7中所示,卷边16包括一个内部卷式接片164、外部卷式接片162及卷唇缘163。内部卷式接片164配置为提供主体11的所选择区域中的该第二区域102中的该第一薄片区段。内部卷式接片164与套筒状侧壁18中所包括的立式外部接片512的上端联接。外部卷式接片162与套筒状侧壁18中所包括的立式内部接片514的上端联接并且与内部卷式接片164的一个面向外的外表面联接。卷唇缘163安排为使内部卷式接片164以及外部卷式接片162各相对面向的侧边互连。如图2中所示,卷唇缘163配置为提供在主体11的所选择区域中的该第二区域102中具有该第二密度的该第二薄片区段并且与内部卷式接片164及外部卷式接片162配合以便形成卷边16。
如图2、5以及8中所示,其中能够通过绝缘性泡孔式非芳香族聚合物材料的薄片实现局部塑性变形的主体11的所选择区域中的一个第三区域103是在主体11所包括的一个底部支架中。底部支架27与套筒状侧壁18的下端联接以便与卷边16处于间隔开的关系,并且与底部20联接以便在相对于套筒状侧壁18的一个固定位置处支撑底部20,从而形成内部区域14。底部支架17包括一个腹板支撑环126、底部固定凸缘26、以及腹板25。腹板支撑环126与套筒状侧壁18的下端联接并且配置为提供在主体11的选择区域中的该第三区域103中具有该第二密度的该第二薄片区段。底部固定凸缘26与底部20联接并且安排为由腹板支撑环126围绕。腹板25安排为使底部固定凸缘26与腹板支撑环126互连。腹板25配置为提供在主体11的所选择区域中的该第三区域103中具有该第一密度的该第一薄片区段。
如图2、5以及9中所示,其中能够通过绝缘性泡孔式非芳香族聚合物材料薄片实现局部塑性变形的主体11的所选择区域中的一个第四区域104是在底部支架17的底部固定凸缘中。底部固定凸缘26包括以侧面对侧面的关系安排的一系列交替的立式厚狭板以及薄狭板以便自腹板25向上朝由套筒状侧壁18以及底部20所界定的内部区域14延伸。立式厚狭板中的一个第一狭板261配置为包括一个自腹板25向上朝内部区域14延伸的右侧边。立式厚狭板的一个第二狭板262配置为包括一个左侧边,该左侧边安排为自腹板25向上朝内部区域14延伸,并且与立式厚狭板的该第一狭板261的右侧边处于间隔开的面对关系。立式薄狭板的一个第一狭板260安排为使立式厚狭板的该第一狭板261的左侧边与立式厚狭板的该第二狭板262的右侧边互连,并且与左侧边及右侧边配合以便在其间限定一个竖直通道263,该竖直通道263向内通向由底部固定凸缘26及底部20中所包括并且位于底部固定凸缘26上方的水平平台21所界定的一个下部的内部区域。立式薄狭板的该第一狭板260配置为提供在主体11的所选择区域中的该第四区域104中的该第一薄片区段。立式厚狭板的该第一狭板261配置为提供在主体11的所选择区域中的该第四区域104中的该第二薄片区段。
用以产生绝缘杯10的绝缘性泡孔式非芳香族聚合物材料的可压缩性使得该绝缘性泡孔式非芳香族聚合物材料准备好用于绝缘杯10的机械组装,而无其他非芳香族聚合物材料所经历的限制。材料的泡孔性质提供如下所讨论的绝缘特征,而易塑性变形性允许在不破裂的情况下生成材料。当该绝缘性泡孔式非芳香族聚合物材料经受压力负载时所经历的塑性变形用于在已移除压力负载后在该绝缘性泡孔式非芳香族聚合物材料中形成永久定形。在一些位置中,定位永久定形的位置以便提供绝缘性泡孔式非芳香族聚合物材料的薄片的受控聚集。
塑性变形还可以用于在薄片中形成折叠线,以便在组装过程期间被作用时控制薄片的变形。当变形存在时,材料在由该变形所形成的空隙中的缺乏提供间隙(relief)以便使材料易于在变形位置折叠。
如本文所述形成的绝缘性泡孔式非芳香族聚合物材料薄片的一个可能的出乎预料的特征为在一个给定厚度下获得的高绝缘值。参见例如下文的实例1和2。
由根据本披露的示例性实施例的绝缘性泡孔式非芳香族聚合物材料形成的杯子的一个潜在特征为该杯子具有低的材料损失。此外,当经受来自常规厨房类型的微波炉加热持续高达若干分钟的一段时间时,本披露的材料可以具有显著低的废气。
由根据本披露的绝缘性泡孔式非芳香族聚合物材料形成的杯子的另一个潜在特征为该杯子可以置放于并且经受常规住宅或商售洗碗机清洁循环(顶部机架(top rack)),而无明显的结构或材料损坏或对材料特性的不利影响。此特征是与珠粒发泡聚苯乙烯杯子或容器相比,珠粒发泡聚苯乙烯杯子或容器在类似清洁过程下可能损坏。因此,可以清洁并且重复使用根据本披露的一个方面制得的杯子。
由根据本披露不同方面的绝缘性泡孔式非芳香族聚合物材料形成的物品的另一个潜在特征为该物品可回收。可回收指的是一种材料(例如回收料)可以添加回到挤出或其他形成过程而无需分离材料组分,即由该材料形成的物品在重新进入挤出过程前无需进行处理来移除一种或多种材料或组分。例如,如果人们不需要在具有层压于杯外部的印刷膜层的杯子研磨成颗粒前分离出该膜层,则该杯子可能是可回收的。相比之下,纸包裹的发泡聚苯乙烯杯可能是不可回收的,因为该聚苯乙烯材料实际不能用作形成发泡聚苯乙烯杯中的材料,即使该杯材料或许可能形成为另一种产品。作为一个另外的实例,由一种具有非苯乙烯印刷膜层粘附于其上的非发泡聚苯乙烯材料形成的杯子可以视为不可回收,因为它会要求分离该聚苯乙烯杯材料与该非苯乙烯膜层,该膜层作为回收料的一部分引入挤出过程将是不希望的。
由本披露的绝缘性泡孔式非芳香族聚合物材料形成的物品的可回收性将产生的一次性废物的量减至最低。比较而言,珠粒发泡聚苯乙烯杯分裂成珠粒并且因此通常不能容易地在使用形成该物品的相同材料的制造方法中重复使用。而且,为产生耐液体性而典型地具有一个挤出涂覆的塑料层或塑料叠层的纸杯一般不能回收,因为不同材料(纸、粘合剂、膜、塑料)通常实际上不能在商业回收操作中分离。
由根据本披露的一个方面(非层压法)的材料形成的杯子或其他物品的一个潜在特征为该绝缘性泡孔式非芳香族聚丙烯薄片(在形成杯子之前或在杯子形成期间,取决于所用制造方法)的外壁表面(或内壁表面或二者)可接受高分辨率图形的印刷。常规珠粒发泡聚苯乙烯杯具有一个典型地未平滑到足以接受除低分辨率图形以外的印刷的表面。类似地,已知无涂层纸杯同样典型地不具有一个对于此类高分辨率图形而言足够平滑的表面。纸杯可经涂布以便具有所希望的表面修整并且可达到高分辨率。纸难以达到绝缘水平并且要求一个结合进或与该杯子相关联的设计的气隙以便实现绝缘,例如滑动到并且套在杯子的一部分上的套筒。因此,解决方案为使用低分辨率印刷、将已印刷的薄膜层压到外壁上,或具有一个插到该外壁外的印刷套筒(黏结的或可移动的),或对纸进行涂布以便接受高分辨率图形。
由根据本披露的一个方面的绝缘性泡孔式非芳香族聚合物材料形成的杯子的一个潜在特征为它具有如通过刚度所测量的出乎预料的强度。刚度为在室温及高温(例如通过用一种热液体填充杯子)下进行的并且测量材料刚度的度量。杯子材料的强度对减少使用者使杯子变形及盖突然弹开或盖或侧壁密封泄漏的可能性而言是重要的。
如下文所述,如通过标准冲击测试所测量,由根据本披露的绝缘性泡孔式非芳香族聚合物材料形成的杯子的一个潜在特征为该套筒耐受例如由吸管、叉、匙、指甲或类似物造成的穿孔。当与珠粒发泡聚苯乙烯杯相比时,测试材料显示实质上较高的抗冲击性。因此,如本文所述的一个方面形成的杯子可以减少热液体穿孔及泄漏到使用者身上的可能性。
由根据如本文所述的一个方面的材料形成的具有压缩边及接缝的杯子的一个特征为较大数目的此类杯子可以一个给定套筒长度嵌套,因为接缝较薄并且侧壁角度可减至最小(即相对于杯底更接近90°),同时提供一个足够的气隙以便使得易于去嵌套。具有比侧壁实质上更厚的接缝的常规接缝形成杯要求较大的侧壁角度(及气隙)以便允许去嵌套,从而导致以给定套筒长度只能嵌套较少的杯子。
由根据本披露的一个方面的材料形成的杯子的一个特征为杯边可以具有小于约0.170英寸(4.318mm)的截面轮廓,这可归因于局部泡孔变形及压缩。如此的小轮廓比较大的轮廓在审美上更令人喜爱。
由根据本披露的一个方面的材料形成的杯子的一个特征为具有不同容积的杯子的卷边直径可以是相同的,从而使得一种盖尺寸能够用于不同杯尺寸(假设杯边外径是相同的)。因此,可以减少库存中以及使用中的不同尺寸的盖子的数目。
材料配制品可以具有使薄片在不破裂的情况下压缩的特性。
本披露的绝缘性泡孔式非芳香族聚合物材料可以形成一种条带,这种条带可以包裹在其他结构周围。例如,可以形成可用作包裹材料的根据本披露的一个方面的材料条带并且将其包裹在管、导管或其他结构周围以便提供改善的绝缘性。薄片或条带可以具有施用于一面或两面的粘合剂(例如压敏粘合剂)层。条带可以卷绕到一个卷筒上。任选地,该条带可以具有一个与其相关的释放衬垫以便使得更容易从卷筒解开条带。例如,可以通过使用一种或多种聚丙烯或具有足够挠性的其他聚烯烃材料来适配该聚合物配制品以便提供形成包裹物或可卷绕条带的必需的挠性,从而能够使挤出薄片足够柔韧以便卷绕于一个卷筒上。绝缘性泡孔式非芳香族聚合物材料可以形成为一种套筒,该套筒可以插到杯子外以便提供额外的绝缘。
在示例性实施例中,由本披露的绝缘性泡孔式非芳香族聚合物材料形成的薄片可以在模口处切割或制成片并且用作大块绝缘体。
本披露的配制品及绝缘性泡孔式非芳香族聚合物材料满足对一种可以形成为包括以下许多(如果不是全部)特征的物品(例如杯子)的材料的长期以来的需求:绝缘性能、易于回收性、抗穿孔性、抗碎性、可微波性及如本文所讨论的其他特征。其他配制品未能提供实现如所附权利要求书中所反映的这些特征的组合的一种材料。这种失败是与竞争性设计选择有关的特征的结果。作为一个实例,其他配制品已经由其产生了材料和结构,这些材料和结构基于设计选择是绝缘的,但受到差的抗穿孔性、不能有效回收并且缺乏可微波性的影响。比较而言,本文中所披露的配制品以及材料通过使用一种绝缘性泡孔式非芳香族聚合物材料克服了其他配制品及材料的不足。此处参考2012年6月7日提交的并且名为“绝缘容器(INSULATEDCONTAINER)”的美国申请号13/491,007,其披露内容涉及由此类绝缘性泡孔式非芳香族聚合物材料形成的物品(例如杯子),该申请特此以其全文结合于本文中。
实例
仅出于说明的目的阐述以下实例。除非另外规定,否则此类实例中出现的份数及百分比数是按重量计。本披露中所引用或提及的所有ASTM、ISO及其他标准测试法以其全文通过引用进行结合。
实例1-配制品以及挤出
DAPLOYTM WB140聚丙烯均聚物(可购自波利亚里斯公司)用作聚丙烯基础树脂。可购自布拉斯科公司的F020HC(一种聚丙烯均聚物树脂)用作次要树脂。两种树脂与以下物质共混:HydrocerolTM CF-40ETM作为主要成核剂、滑石作为次要成核剂、CO2作为发泡剂、一种增滑剂、以及二氧化钛作为着色剂。百分比为:
79.9%主要树脂:<高熔体强度聚丙烯Borealis WB140HMS15%次要树脂:F020HC(布拉斯科公司)
0.1%主要成核剂:Clariant Hyrocerol CF-40ETM
2%次要成核剂:滑石
1%着色剂:TiO2PE(可替代地,可以使用PP)
2%增滑剂:AmpacetTM102823LLDPE(线性低密度聚乙烯),可购自安配色公司(Ampacet Corporation)
将该配制品加入一个挤出机料斗中。该挤出机将该配制品加热以便形成一种熔融树脂混合物。向这种混合物中加入
1.1lbs/hr CO2
0.7lbs/hr R134a
将二氧化碳以及R134a注入该树脂共混物中以使树脂膨胀并且减小密度。将如此形成的混合物经由一个模头挤出成薄片。接着切割薄片并且形成一种杯子。
实例1-测试结果
根据实例1形成的材料的测试结果展示该材料具有约0.1902g/cm3的密度及约0.089英寸(2.2606mm)的标称薄片规格。
可微波性
将使用此材料产生的、用12盎司室温水填充的容器在一个FISO微波站(Microwave Station)(1200瓦)微波炉中加热持续2.5分钟,无燃烧或焦化或对杯子的其他可见影响。比较而言,在同一微波炉中加热的纸杯在不到90秒内焦化或燃烧。
刚度
测试方法
样品处于73°F(22.8℃)以及50%的相对湿度下。使用一个含有负载单元(load cell)的水平测力计进行杯子硬度/刚度测试,以便测量当暴露于以下测试条件时杯子的抵抗力:(a)杯子上的测试位置为自杯边向下1/3;(b)测试行进距离为0.25英寸(6.35mm);以及(c)测试行进时间为10秒。
测试结果
当平均壁厚为约0.064英寸(1.6256mm)、平均密度为约0.1776g/cm3、并且平均杯子重量为约9.86g时,材料的刚度在下面的表1-2中示出。
表1-刚度测试结果
表2-刚度测试结果汇总
绝缘性
测试方法
使用如下典型的工业上的杯绝缘测试法:
·用胶将(杯外部)表面温度热电偶附接到杯子上。
·用玻璃胶带将热电偶胶带附接到杯子上,这样使得热电偶位于杯子中间与接缝相对。
·将水或其他水性液体加热至接近沸腾,例如在微波中。
·用球温度计连续搅拌热液体,同时观测液体温度。
·记录热电偶温度。
·当液体达到200°F时,将液体倾入杯子中至几乎充满。
·将盖子置放于杯子上。
·记录表面温度持续最少5分钟。
材料厚度为约0.089英寸(2.2606mm)。密度为约0.1902g/cm3。
测试结果
使用由上文所述的配制品形成的、并且具有约0.190g/cm3的密度及约0.089英寸的壁厚的杯子。将一种200°F(93.3℃)下的热液体置于该杯子中。
测试结果
在杯外壁上测得的温度为约140.5°F(60.3℃),产生了约59.5°F(33℃)的下降。在五分钟的一段时间内观察到最大温度为在约140.5°F(60.3℃)下的峰值。温度越低,杯材料的绝缘特性越佳,这是因为该材料减少了自液体至杯材料外部的热传递。
易碎性
易碎性可以定义为对引起破碎的撕裂或穿孔的抵抗性。
测试方法
使用ASTM D1922-93中所述的埃尔门多夫测试法(Elmendorf testmethod)。撕裂半径为1.7英寸(43.18mm)。
测试结果
测试结果在下面的表3-4中示出。当与EPS相比时,如本披露的一个示例性实施例中所形成的材料提供优越的撕裂力抵抗性。
表3-测试结果
表4-测试结果汇总
注意不存在发泡聚苯乙烯横向方向测试所获得的数据,这是因为发泡聚苯乙烯因制造方法不具有材料取向(即,机器方向或横向方向)。本披露所测试材料的范围(计算如下:下限=平均值-(3×标准差);上限=平均值+(3×标准差))在机器方向上为约213克-力至约351克-力并且在横向方向为约143克-力至约281克-力。比较而言,所测试的发泡聚苯乙烯材料的范围为约103克-力至约121克-力。
抗穿孔性
测试方法
测定穿刺杯侧壁及底部所需的力及行程。以设定为每分钟10英寸(254mm)行进速度的压缩模式使用一台英斯特朗(Instron)仪器。使用在英斯特朗底座上的杯穿孔测试夹具。此夹具使杯子套在适合杯内部的形状上,其中顶表面垂直于英斯特朗测试仪的行程。该夹具的一英寸直径孔应向上安置。英斯特朗仪器移动的部分应装配一个0.300英寸(7.62mm)直径的穿孔器。在测试夹具中,穿孔器与孔对准。将杯子置放在夹具上方并且记录穿刺杯侧壁所需的力及行程。在三个均匀隔开的位置重复侧壁穿孔测试,但不在杯子接缝上进行穿孔测试。测试杯底部。除不使用夹具以外,这应以与侧壁测试相同的方式进行。仅将杯子倒置于英斯特朗底座上,同时在杯底部的中心上使穿孔器向下。
测试结果
典型侧壁穿孔及底部穿孔的结果在下面的表5中示出。
表5-穿孔测试结果
缓慢穿孔抗性-吸管
测试方法
使用如ASTM D-3763-86中所述的缓慢穿孔抗性测试法,当与发泡聚苯乙烯相比时,如本披露的一个示例性实施例中所形成的材料提供优越的抗穿孔性。测试结果在下面的表6-9中示出。
测试结果
表6-测试材料
表7-比较:发泡聚苯乙烯
表8-纸包裹的发泡聚苯乙烯
表9–缓慢穿孔-吸管测试结果汇总
实例2-配制品以及挤出
使用以下配制品:
81.70%Borealis WB140HMS主要聚丙烯
0.25%Amco A18035PPRO滑石填充的浓缩物
2%Ampacet102823加工助剂PE MB线性低密度聚乙烯增滑剂
0.05%Hydrocerol CF-40E化学发泡剂
1%Colortech11933-19着色剂
15%Braskem F020HC高结晶度均聚物聚丙烯
将3.4lbs/小时的CO2引入熔融树脂中。
所形成条带的密度在从约0.155g/cm3至约0.182g/cm3的范围内。
将该配制品加入一个挤出机料斗中。该挤出机将该配制品加热以便形成一种熔融树脂混合物。向此混合物中添加CO2以便使树脂膨胀并且减小密度。如此形成的混合物经由一个模头挤出成条带82。接着切割条带并且形成绝缘杯10。
实例2-测试结果
在示例性实施例中,当挤出材料时,一种挤出的绝缘性泡孔式非芳香族聚合物材料管具有在不同冷却条件下形成的两个表面。一个表面(下面将被称为挤出管外表面)与空气接触,并且不具有限制膨胀的物理障碍。挤出管表面的外表面通过吹送压缩空气以等于或大于每秒12℉的冷却速率冷却。相对侧上的表面将被称为挤出管内部。挤出管表面内部是在物理地限制挤出管内部的鱼雷形(torpedo)心轴的金属冷却表面上以腹板或机器方向拉制挤出管时形成的,并且通过水及压缩空气的组合以小于每秒10°F的冷却速率冷却。在示例性实施例中,冷却水温度为约135°F(57.22℃)。在示例性实施例中,冷却空气温度为约85°F(29.44℃)。由于不同的冷却机制,挤出管外表面以及挤出管表面内部具有不同的表面特征。已知冷却速率及方法影响聚丙烯的结晶过程,从而改变聚丙烯的形态(晶畴尺寸)及形貌(表面轮廓及平滑性)。
如本文所述的挤出薄片的示例性实施例的一个出乎预料的特征为薄片在弯曲形成圆形物品(例如杯子)时形成明显平滑、无褶皱及折皱表面的能力。表面甚至在杯内部也是平滑并且无折皱的,在杯内部压缩力典型地易使材料(尤其具有大泡孔尺寸的低密度材料)压出褶皱。在示例性实施例中,如通过显微术所检测的绝缘性泡孔式非芳香族聚合物材料挤出薄片表面的平滑度是这样,即,使得当该薄片在杯形成期间经受伸展及压缩力时,杯表面外部及内部中天然存在的压痕(褶皱或折皱)深度可以小于约100微米。在一个示例性实施例中,平滑度可以小于约50微米。在一个示例性实施例中,平滑度可以为约5微米或更低。在约10微米及更低的深度下,杯表面上的微小折皱是肉眼通常看不见的。
在一个示例性实施例中,一种由包括表层及绝缘性泡孔式非芳香族聚合物材料条带的薄片形成的绝缘杯具有约200微米深的自杯顶延伸至杯底的典型褶皱(深折皱)。在一个示例性实施例中,一种由仅包括绝缘性泡孔式非芳香族聚合物材料条带(无表层)的薄片形成的绝缘杯具有约200微米深的自杯顶延伸至杯底的典型褶皱。当挤出管内部在压缩模式中面向杯内部时,典型地形成具有从约100微米至约500微米深度的此类褶皱。褶皱及深折皱可能存在令人不满意的表面品质问题,从而使得最终的杯子不可用或不希望。褶皱可以在其中薄片包括表层或不包括表层的情形下形成。
在示例性实施例中,绝缘性泡孔式非芳香族聚合物材料可以条带的形式挤出。然而,显微图像示出挤出条带内存在两个不同的层,即,无光泽的挤出管外层及有光泽的挤出管内层。两层之间的差异为归因于晶畴尺寸方面的差异的表面反射。如果使用黑色标记物给由显微镜检查的表面上色,则消除了反射并且两表面之间的差异可以是最低的或不可检测的。
在一个示例性实施例中,制备无任何表层的一种样品条带。使用黑色标记物来消除层间的反射方面的任何差异。图像示出泡孔尺寸及泡孔分布在整个条带厚度中是相同的。约200微米深的褶皱被视为,当泡孔壁在压缩力下坍塌时表面内的折叠。
在TA Instruments DSC2910上在氮气气氛中进行的差示扫描量热法分析示出,随着冷却速率增加,条带的聚合物基质材料的结晶温度及结晶度降低,如下面的表10中所示。
表10
差示扫描量热法数据显示结晶及随后二次加热熔化温度及百分比结晶度对于结晶期间冷却速率的依赖性。绝缘性泡孔式非芳香族聚合物材料条带的示例性实施例可以具有在约160℃(320°F)与约172℃(341.6°F)之间的熔化温度、在约108℃(226.4°F)与约135℃(275°F)之间的结晶温度以及在约42%与约62%之间的结晶度百分比。
在示例性实施例中,如通过差示扫描量热法在每分钟10℃的加热及冷却速率下所测定的挤出薄片具有约162℃(323.6°F)的熔化温度、约131℃(267.8°F)的结晶温度以及约46%的结晶度。
出乎意料地发现,挤出管外表面在压缩模式中有利地起作用而不产生可感知的褶皱,并且因此杯子(或其他结构)可以有利地以挤出管外表面面向绝缘杯内部来制成。挤出管内层及挤出管外层对压缩力的抵抗性的差异可以归因于层形态的差异,这是因为它们在不同的冷却速率下结晶。
在形成一种挤出薄片的示例性实施例中,挤出管内表面可以通过水冷及压缩空气的组合来冷却。挤出管外表面可以通过使用具有循环水及空气出口的鱼雷形物由压缩空气来冷却。较快冷却速率可以导致形成较小尺寸晶体。典型地,冷却速率越快,所形成的较小晶体的相对量愈大。在PanalyticalX'pert MPD Pro衍射仪上,使用在45KV/40mA下的Cu辐射对绝缘性泡孔式非芳香族聚合物材料的示例性挤出薄片进行X射线衍射分析。已证实,挤出管外表面具有约99埃的晶畴尺寸,而挤出管内表面具有约114埃的晶畴尺寸。在示例性实施例中,一种绝缘性泡孔式非芳香族聚合物材料的挤出条带可以具有低于约200埃的晶畴尺寸。在示例性实施例中,一种绝缘性泡孔式非芳香族聚合物材料的挤出条带可以具有优选地低于约115埃的晶畴尺寸。在示例性实施例中,一种绝缘性泡孔式非芳香族聚合物材料的挤出条带可以具有低于约100埃的晶畴尺寸。
刚度
测试方法
测试法与实例1中所述的用于刚度测试的相同。
测试结果
刚度测试结果在下面的表11中示出。
表11
绝缘性
测试方法-壁温
使用一个由上文所述的配制品形成的绝缘杯,该绝缘杯具有约0.18g/cm3的密度以及约0.074英寸(1.8796mm)的壁厚。将一种200°F(93.3℃)下的热液体置于该杯子中。
测试结果
在杯外壁上测量的温度为约151°F(66.1℃),其中下降了约49.0°F(27.2℃)。在五分钟的一段时间内观察到最大温度为在约151°F(66.1℃)下的峰值。
以热导率形式进行绝缘性测试。
测试法-热导率
此测试测量在环境温度以及93℃(199.4°F)下测量的本体热导率(W/m-K)。使用ThermTest TPS2500S热常数分析仪仪器,采用ISO/DIS22007-2.2的测试法并且使用低密度/高绝缘选项。所有测量均使用具有绝缘的TPS传感器#55010.2521英寸半径(6.403mm半径)。使用0.02瓦功率,进行20秒测试。记录使用点100-200的数据。
测试结果
测试结果在下面的表12中示出。
表12-平均热导率结果
温度(℃) | 平均热导率(W/m-K) | 标准差(W/m-K) |
21 | 0.05792 | 0.00005 |
93 | 0.06680 | 0.00025 |
虽然上文仅详细描述了若干示例性实施例,但本领域普通技术人员将易于了解,在本质上不背离新颖的教导以及优势的情况下,在示例性实施例中很多改变是可能的。因此,所有此类改变均旨在包括在如以下权利要求书中所定义的本披露的范围内。
如在本说明书和所附的权利要求书中所使用的,除非上下文另外明确指出,单数形式“一个(a/an)”以及“该(the)”包括复数指示物。本文中可能将范围表述为从“大约”一个具体的数值,和/或到“大约”另一个具体的数值。当表述这样一个范围时,另一个实施例包括从该一个具体的数值和/或到该另一个具体的数值。类似地,当数值被表述为近似值时,通过使用先行词“大约”,可以理解为该具体的数值形成另一个实施例。此外,应理解这些范围中的每一个的端点既与另一个端点显著相关,又显著独立于另一个端点。
“任选的”或“任选地”指的是随后描述的事件或情况可能发生或可能不发生,并且指的是描述包含其中所述事件或情况发生的情形以及其不发生的情形。
遍及本说明书的说明及权利要求书,词语“包括(comprise)”及该词语的变体,例如“包括着(comprising)”及“包括有(comprises)”,指的是“包含(但不限于)”,并且不旨在排除例如其他添加剂、组分、整数或步骤。“示例性”指的是“的一个实例”并且不旨在表达一个优选的或理想的实施例的指示。“例如”并非以限制性意义使用,而是出于说明性目的。
披露的是可以用于进行所披露的方法、设备以及体系的组分。本文中披露了这些以及其他组分,并且应理解当披露这些组分的组合、子集、相互作用、组等时,虽然这些组分的各不同个体及共同组合及排列的特定参考物可能未明确披露,但对于所有方法、设备及体系,本文中对每一者都进行了具体考虑以及描述。此种情况应用于本申请的所有方面,包括(但不限于)所披露的方法中的步骤。因此,如果存在可以进行的多个附加步骤,则应理解这些附加步骤中的每一个都可以用所披露方法的任何特定实施例或实施例的组合进行。
对本领域普通技术人员而言将清楚的是可以在不背离范围或精神的情况下进行不同的改变和变更。从考虑本文中所披露的说明书及实践,其他实施例对于本领域普通技术人员将是明显的。旨在仅将本说明书及实例视为示例性的。
此外,应注意本文中所提及的任何公开物及文册都通过引用以其全文结合。
Claims (66)
1.一种用于形成绝缘性泡孔式非芳香族聚合物结构的配制品,该配制品包括
一种第一聚合物材料,该聚合物材料包括至少一种具有长链支化的高熔体强度聚丙烯,
一种第二聚合物材料,该聚合物材料包括至少一种选自下组的聚合物,该组由以下各项组成:聚丙烯、聚乙烯、以及其混合物,
至少一种成核剂,以及
至少一种增滑剂。
2.如权利要求1所述的配制品,其中该第一材料是一种均聚物。
3.如权利要求1所述的配制品,其中根据ISO16790,该第一聚合物材料具有至少36的熔体强度。
4.如权利要求1所述的配制品,其中该第一聚合物材料具有至少163℃(325.4°F)的熔化温度。
5.如权利要求1所述的配制品,其中该第二聚合物材料包括一种选自下组的基于聚乙烯的材料,该组由以下各项组成:低密度聚乙烯、线性低密度聚乙烯、高密度聚乙烯、乙烯-乙酸乙烯酯共聚物、乙烯-丙烯酸乙酯共聚物、乙烯-丙烯酸共聚物、以及其混合物和组合。
6.如权利要求1所述的配制品,其中该成核剂是至少一种选自下组的材料,该组由以下各项组成:化学成核剂、物理成核剂、以及其混合物和组合。
7.如权利要求1所述的配制品,其中该成核剂是柠檬酸或一种基于柠檬酸的材料。
8.如权利要求1所述的配制品,其中该成核剂是至少一种选自下组的材料,该组由以下各项组成:滑石、CaO3、云母、以及至少两种上述物的混合物。
9.如权利要求1所述的配制品,其中该发泡剂是至少一种选自下组的材料,该组由以下各项组成:化学发泡剂、物理发泡剂、以及其组合。
10.如权利要求1所述的配制品,进一步包括至少一种发泡剂。
11.如权利要求10所述的配制品,其中在熔化该配制品前将该至少一种发泡剂引入并且混合进该配制品中。
12.如权利要求11所述的配制品,其中该发泡剂是至少一种以加压液体的形式引入的气体。
13.如权利要求12所述的配制品,其中该发泡剂是至少一种选自下组的气体,该组由以下各项组成:二氧化碳、氮气、氦气、氩气、空气、戊烷、丁烷、或其他的烷烃、以及其混合物。
14.如权利要求10所述的配制品,其中该发泡剂是一种反应或分解以释放气体的化学发泡剂。
15.如权利要求14所述的配制品,其中该化学发泡剂是CaCO3。
16.如权利要求14所述的配制品,其中该成核剂进一步包括一种催化剂。
17.如权利要求16所述的配制品,其中该结构具有在机器方向上的约0.016英寸的长度和约0.003英寸的宽度的平均泡孔尺寸以及横向方向上的约0.017英寸的长度和约0.003英寸的宽度的平均泡孔尺寸。
18.如权利要求1所述的配制品,其中该发泡剂是至少一种选自下组的材料,该组由以下各项组成:偶氮二甲酰胺、偶氮二异丁腈、苯磺酰肼、4,4-苯酚磺酰基氨基脲、p-甲苯磺酰基氨基脲、偶氮二羧酸钡、N,N’-二甲基-N,N’-二亚硝基对苯二甲酰胺、三肼基三嗪、甲烷、乙烷、丙烷、正丁烷、异丁烷、正戊烷、异戊烷、新戊烷、氟代甲烷、全氟甲烷、氟乙烷、1,1-二氟乙烷、1,1,1-三氟乙烷、1,1,1,2-四氟-乙烷、五氟乙烷、全氟乙烷、2,2-二氟丙烷、1,1,1-三氟丙烷、全氟丙烷、全氟丁烷、全氟环丁烷、氯甲烷、二氯甲烷、氯乙烷、1,1,1-三氯乙烷、1,1-二氯-1-氟乙烷、1-氯-1,1-二氟乙烷、1,1-二氯-2,2,2-三氟乙烷、1-氯-1,2,2,2-四氟乙烷、三氯一氟甲烷、二氯二氟甲烷、三氯三氟乙烷、二氯四氟乙烷、氯七氟丙烷、二氯六氟丙烷、甲醇、乙醇、正丙醇、异丙醇、碳酸氢钠、碳酸钠、碳酸氢铵、碳酸铵、亚硝酸铵、N,N’-二甲基-N,N’-二亚硝基对苯二甲酰胺、N,N’-二亚硝基五亚甲基四胺、偶氮二甲酰胺、偶氮双异丁腈、偶氮环己腈、偶氮二氨基苯、偶氮二羧酸钡、苯磺酰肼、甲苯磺酰肼、p,p’-氧双(苯磺酰肼)、二苯砜-3,3’-二磺酰肼、叠氮化钙、4,4’-二苯基二磺酰基叠氮化物、以及p-甲苯磺酰基叠氮化物。
19.如权利要求1所述的配制品,其中该增滑剂是至少一种脂肪酸或基于脂肪酸的材料。
20.如权利要求1所述的配制品,其中该增滑剂是至少一种选自下组的材料,该组由以下各项组成:芥酸酰胺、油酰胺、以及其混合物。
21.如权利要求1所述的配制品,进一步包括至少一种选自下组的材料,该组由以下各项组成:抗冲击改性剂、着色剂、发泡剂、化合物回收料、以及至少两种上述物的混合物。
22.如权利要求1所述的配制品,进一步包括一种着色剂。
23.如权利要求1所述的配制品,其中该结构具有在机器方向上的约0.016英寸(0.4064mm)的长度和约0.003英寸(0.0762mm)的宽度的平均泡孔尺寸以及横向方向上的约0.017英寸(0.4318mm)的长度和约0.003英寸(0.0762mm)的宽度的平均泡孔尺寸。
24.如权利要求1所述的配制品,其中该结构具有多个泡孔,这些泡孔在至少一个方向上具有在约1.0至约3.0范围内的平均泡孔纵横比。
25.如权利要求1所述的配制品,其中该结构具有多个泡孔,这些泡孔在至少一个方向上具有在约1.0至约2.0范围内的平均泡孔纵横比。
26.如权利要求1所述的配制品,其中该结构在10度/分钟的加热和冷却速率下具有在约160℃(320°F)与约172℃(341.6°F)之间的熔化温度、在约108℃(226.4°F)与约135℃(275°F)之间的结晶温度、以及在约42%与约62%之间的结晶度百分比。
27.如权利要求1所述的配制品,其中该结构在10度/分钟的加热和冷却速率下具有约162℃(323.6°F)的熔化温度、约131℃(267.8°F)的结晶温度、以及约46%的结晶度。
28.如权利要求1所述的配制品,其中该绝缘性泡孔式非芳香族聚合物结构具有在约0.01g/cm3至约0.19g/cm3范围内的密度。
29.如权利要求1所述的配制品,其中该绝缘性泡孔式非芳香族聚合物结构具有在约0.05g/cm3至约0.19g/cm3范围内的密度。
30.如权利要求1所述的配制品,其中该绝缘性泡孔式非芳香族聚合物结构具有在约0.1g/cm3至约0.185g/cm3范围内的密度。
31.如权利要求1所述的配制品,其中该结构可以暴露于约1,200瓦特的微波能量下持续高达约2.5分钟而没有可见的燃烧或焦化。
32.如权利要求1所述的配制品,其中该结构具有约0.089英寸(2.2606mm)的壁厚以及约0.1902g/cm3的密度,以及在约0.545千克-力(kg-F)至约0.716千克-力(kg-F)范围内的刚度。
33.如权利要求1所述的配制品,其中根据如ASTM D3763-86中所述的缓慢穿孔抗性测试法,该材料具有高达约15,210克-力的平均抗穿孔性。
34.如权利要求1所述的配制品,其中根据ASTM D1922-93,该结构在该机器方向上具有至少约282克-力的抗撕裂性。
35.如权利要求1所述的配制品,其中根据埃尔门多夫测试法ASTMD1922-93,在机器方向上,该结构要求至少约282克-力来撕裂该材料。
36.如权利要求1所述的配制品,其中根据如在ASTM D1922-93中所述的埃尔门多夫测试法,在横向方向上,该结构要求至少约212克-力来撕裂该材料。
37.如权利要求1所述的配制品,其中根据埃尔门多夫测试法ASTMD1922-93,在机器方向上,该结构要求在约213克-力至约351克-力范围内的力来撕裂该材料。
38.如权利要求1所述的配制品,其中根据埃尔门多夫测试法ASTMD1922-93,在横向方向上,该结构要求在约143克-力至约281克-力范围内的力来撕裂该材料。
39.如权利要求1所述的配制品,其中当形成一个杯子时,当该杯子填充有处于约200°F(93.33℃)下的一种液体并且一个盖子放置于该杯子上时,该结构具有约140.5°F(60.28℃)的最大外表面温度。
40.如权利要求1所述的配制品,其中当形成一种条带时,该结构在21℃下具有约0.05792W/m-K的平均热传导率,其中在21℃下,标准差为约0.00005W/m-K。
41.如权利要求1所述的配制品,其中当形成一种条带时,该结构在93℃下具有约0.06680W/m-K的平均热传导率,其中在93℃下,标准差为约0.00025W/m-K。
42.如权利要求1所述的配制品,其中该结构是可回收的。
43.如权利要求1所述的配制品,其中该结构可以接受在其至少一个表面上的图形印刷。
44.一种用于形成绝缘性泡孔式非芳香族聚合物结构的配制品,该配制品包括
一种第一聚合物材料,该第一聚合物材料包括至少一种高熔体强度聚丙烯,该聚丙烯具有至少36的熔体强度和至少163℃(325.4°F)的熔化温度,
一种第二聚合物材料,该第二聚合物材料包括至少一种选自由抗冲共聚物和高结晶的均聚物组成的组的聚丙烯,
至少一种选自下组的成核剂,该组由以下各项组成:化学成核剂、物理成核剂、以及其组合和混合物,
至少一种发泡剂,以及
至少一种包括脂肪酸或基于脂肪酸的组合物的增滑剂。
45.一种用于形成绝缘性泡孔式非芳香族聚合物结构的配制品,该配制品包括
一种包括至少一种高熔体强度聚丙烯的聚合物材料,
至少一种选自下组的成核剂,该组由以下各项组成:化学成核剂、物理成核剂、以及其组合,以及
至少一种增滑剂。
46.一种用于形成绝缘性泡孔式非芳香族聚合物结构的配制品,该配制品包括
一种包括至少一种高熔体强度聚丙烯聚合物的第一材料,
一种第二材料,该第二材料包括至少一种选自由抗冲共聚物和高结晶的均聚物组成的组的聚丙烯,
至少一种选自下组的成核剂,该组由以下各项组成:化学成核剂、物理成核剂、以及其组合,
一种惰性气体,以及
一种增滑剂。
47.一种用于形成绝缘性泡孔式非芳香族聚合物结构的配制品,该配制品包括
一种第一材料,该第一材料包括至少一种高熔体强度聚丙烯,该聚丙烯具有至少36的熔体强度和至少163℃(325.4°F)的熔化温度,
一种包括至少一种抗冲共聚物的第二材料,
一种包括柠檬酸或基于柠檬酸的化学成核剂,
滑石,
一种增滑剂,以及
二氧化碳。
48.如权利要求47所述的配制品,进一步包括二氧化钛。
49.一种用于形成绝缘性泡孔式非芳香族聚合物结构的配制品,该配制品包括
一种包括聚乳酸的第一材料,
至少一种选自下组的成核剂,该组由以下各项组成:化学成核剂、物理成核剂、以及其组合,
至少一种发泡剂,以及
至少一种增滑剂。
50.如权利要求49所述的配制品,其中该聚乳酸是衍生自玉米淀粉。
51.一种用于形成绝缘性泡孔式非芳香族聚合物结构的熔融树脂,该熔融树脂包括
一种第一聚合物材料,该第一聚合物材料包括至少一种高熔体强度聚丙烯,该聚丙烯具有至少36的熔体强度和至少163℃(325.4°F)的熔化温度,
一种第二聚合物材料,该第二聚合物材料包括至少一种选自由抗冲共聚物和高结晶的均聚物组成的组的聚丙烯,
至少一种选自下组的成核剂,该组由以下各项组成:化学成核剂、物理成核剂、以及其组合,
至少一种发泡剂,该发泡剂包括至少一种选自下组的组合物,该组由以下各项组成:化学发泡剂、惰性气体、以及其组合,以及
至少一种包括脂肪酸或基于脂肪酸的组合物的增滑剂。
52.一种绝缘性泡孔式非芳香族聚合物挤出物,包括
一种第一聚合物材料,该第一聚合物材料包括至少一种高熔体强度聚丙烯,该聚丙烯具有至少36的熔体强度和至少163℃(325.4°F)的熔化温度,以及
一种第二聚合物材料,该第二聚合物材料包括至少一种选自由抗冲共聚物和高结晶的均聚物组成的组的聚丙烯,
其中该挤出物具有于其中所形成的多个泡孔。
53.一种绝缘性泡孔式非芳香族聚合物物品,包括
一种第一聚合物材料,该第一聚合物材料包括至少一种高熔体强度聚丙烯,该聚丙烯具有至少36的熔体强度和至少163℃(325.4°F)的熔化温度,以及
一种第二聚合物材料,该第二聚合物材料包括至少一种选自由抗冲共聚物和高结晶的均聚物组成的组的聚丙烯,
其中该物品具有于其中所形成的多个泡孔。
54.一种由配制品形成的容器,该配制品包括
一种第一材料,该第一材料包括至少一种高熔体强度聚丙烯,该聚丙烯具有至少36的熔体强度和至少163℃(325.4°F)的熔化温度,
一种第二材料,该第二材料包括至少一种选自由抗冲共聚物和高结晶的均聚物组成的组的聚丙烯,
至少一种选自下组的成核剂,该组由以下各项组成:化学成核剂、物理成核剂、以及其组合,
一种发泡剂,以及
一种选自下组的增滑剂,该组由以下各项组成:芥酸酰胺、油酰胺、线性低密度聚乙烯、以及其至少两种的混合物。
55.如权利要求54所述的容器,其中该容器包括约0.089英寸(2.2606mm)的壁厚以及约0.1902g/cm3的密度,并且具有在约0.545千克-力至约0.716千克-力范围内的未填充未加盖的刚度。
56.如权利要求54所述的容器,其中该容器包括0.089英寸(2.2606mm)的壁厚以及0.1902g/cm3的密度,并且具有在约0.680千克-力至约1.011千克-力范围内的未填充加盖的刚度。
57.如权利要求54所述的容器,其中该容器包括约0.089英寸(2.2606mm)的壁厚以及约0.1902g/cm3的密度,并且在约200°F(93.33℃)下具有在约0.238千克-力(kg-F)至约0.324千克-力(kg-F)范围内的热填充未加盖的刚度。
58.如权利要求54所述的容器,其中该容器包括约0.089英寸(2.2606mm)的壁厚以及约0.1902g/cm3的密度,并且在约200°F(93.33℃)下具有在约0.227千克-力(kg-F)至约0.476千克-力(kg-F)范围内的热填充加盖的刚度。
59.如权利要求54所述的容器,其中该容器包括约0.089英寸(2.2606mm)的壁厚以及约0.1902g/cm3的密度,并且在约35°F(1.67℃)下具有在约0.698千克-力(kg-F)至约0.894千克-力(kg-F)范围内的冷填充未加盖的刚度。
60.如权利要求54所述的容器,其中该容器包括约0.089英寸(2.2606mm)的壁厚以及约0.1902g/cm3的密度,并且在约35°F(1.67℃)下具有在约0.837千克-力(kg-F)至约1.192千克-力(kg-F)范围内的冷填充加盖的刚度。
61.一种由配制品形成的绝缘性泡孔式非芳香族聚合物包裹材料,该配制品包括
一种第一材料,该第一材料包括至少一种高熔体强度聚丙烯,该聚丙烯具有至少36的熔体强度和至少163℃(325.4°F)的熔化温度,
一种第二材料,该第二材料包括至少一种选自由抗冲共聚物和高结晶的均聚物组成的组的聚丙烯,
至少一种选自下组的成核剂,该组由以下各项组成:化学成核剂、物理成核剂以及其组合,
至少一种发泡剂,以及
一种增滑剂,
其中使该包裹材料形成为一种可以包裹在物件周围的条带。
62.如权利要求61所述的配制品,进一步包括一种与该条带的至少一个表面相关联的粘合剂。
63.如权利要求62所述的配制品,进一步包括一种释放衬垫。
64.如权利要求61所述的配制品,其中卷起该条带以便形成一个卷筒。
65.一种用于形成绝缘性泡孔式非芳香族聚合物材料结构的方法,该方法包括以下步骤
a.提供一种包括至少一种高熔体强度聚丙烯聚合物的第一材料,
b.提供一种第二材料,该第二材料包括至少一种选自由抗冲共聚物和高结晶的均聚物组成的组的聚丙烯,
c.提供至少一种选自下组的成核剂,该组由以下各项组成:化学成核剂、物理成核剂、以及其组合,
d.将一种增滑剂加入该树脂混合物中,
e.混合在步骤a-d中所提供的这些材料以便形成一种树脂混合物,
f.加热该树脂混合物以便形成一种熔融树脂混合物,
g.将一种发泡剂加入该熔融树脂混合物中以便产生一种挤出树脂混合物,并且
h.挤出该挤出树脂混合物以便形成一种具有于其中所形成的多个泡孔的结构。
66.一种通过如下方法形成的绝缘性泡孔式非芳香族聚合物材料结构,该方法包括以下步骤
a.提供一种包括至少一种高熔体强度聚丙烯聚合物的第一材料,
b.提供一种第二材料,该第二材料包括至少一种选自由抗冲共聚物和高结晶的均聚物组成的组的聚丙烯,
c.提供至少一种选自下组的成核剂,该组由以下各项组成:化学成核剂、物理成核剂、以及其组合,
d.将一种增滑剂加入该树脂混合物中,
e.混合在步骤a-d中所提供的这些材料以便形成一种树脂混合物,
f.加热该树脂混合物以便形成一种熔融树脂混合物,
g.将一种发泡剂加入该熔融树脂混合物中以便产生一种挤出树脂混合物,并且
h.挤出该挤出树脂混合物以便形成一种具有于其中所形成的多个泡孔的结构。
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PCT/US2012/041397 WO2013032552A1 (en) | 2011-08-31 | 2012-06-07 | Polymeric material for an insulated container |
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