CN102046881B - 低密度纸板 - Google Patents
低密度纸板 Download PDFInfo
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Abstract
纸板,包括固态漂白的硫酸盐纸板基底和施加到所述纸板基底上的涂层以形成涂覆结构,该涂覆结构具有纸张定量、纸张厚度和Parker Print Surf光滑度,该Parker Print Surf光滑度为至多约3微米,该纸张定量为至多约Y1磅/3000ft2,其中Y1是以点为单位的所述纸张厚度(X)的函数,且如下计算:Y1=3.79+13.43X-0.1638X2。
Description
优先权
本专利申请要求2008年5月28日提交的美国序列号61/056,712和2009年3月27日提交的美国序列号12/412,773的优先权,其全部内容通过引用结合进来。
发明背景
本专利申请涉及低密度纸板,更特别地涉及具有光滑表面的低密度纸板。
纸板通常用于各种包装用途。例如,无菌液体包装纸板用于包装饮料容器和箱等。因此,客户通常优选具有几乎没有缺陷的通常光滑表面的纸板以便于印刷高质量的文字和图形,由此提高纸板中包装的产品的视觉外观。
通常,纸板的光滑度是通过湿堆压延工艺(wet stack calendering)实现的,其中将该纸板再次润湿并通过具有两个或更多个硬辊的压延装置。该湿堆压延工艺通过压缩纤维纸幅络以除去原料板中的坑和裂缝而使该纸板光滑。因此,光滑的纸板典型地比较不光滑的纸板更致密(即松散度更低)。
例如,在图1中,描绘了某些现有技术固态漂白的硫酸盐(SBS)纸板制品的以磅/令(1令=3000平方英尺)计的纸张定量与纸张厚度(1点=0.001英寸)之间的关系,由此提供了现有技术纸板密度(即纸张定量除以纸张厚度)的视觉表示。如能够看到的那样,该数据点通常落入曲线R1~曲线R2的经范围内。在现有技术中尚未观察到更低密度的纸板(即低于曲线R1的纸板),特别是具有光滑表面的低密度纸板。
然而,低密度是很多纸板应用中所需的品质。然而,使用传统的湿堆压延工艺制备光滑纸板需要显著提高该纸板的密度。
因此,存在提供用于高品质印刷所需的光滑度的低密度纸板同时降低生产成本的需求。
发明内容
在一方面,所公开的低密度纸板可以包括纤维基底和施加到该纤维基底上的涂层以形成涂覆结构,该涂覆结构具有至多约3微米的Parker Print Surf光滑度、纸张厚度(caliper thickness)和纸张定量(basisweight),该纸张定量至多约为Y1,其中Y1是以点(point)为单位的纸张厚度(X)的函数,并使用如下的方程1计算:
Y1=3.79+13.43X-0.1638X2(方程1)
在另一方面,所公开的低密度纸板可以包括纤维基底和施加到该纤维基底上的涂层以形成涂覆结构,该涂覆结构具有至多约3微米的Parker Print Surf光滑度、纸张厚度和纸张定量,该纸张定量至多约为Y2,其中Y2是以点为单位的纸张厚度(X)的函数,并使用如下的方程2计算:
Y2=3.71+13.14X-0.1602X2(方程2)
在另一方面,所公开的低密度纸板可以包括纤维基底和施加到该纤维基底上的涂层以形成涂覆结构,该涂覆结构具有至多约3微米的Parker Print Surf光滑度、纸张厚度和纸张定量,该纸张定量至多约为Y3,其中Y3是以点为单位的纸张厚度(X)的函数,并使用如下的方程3计算:
Y3=3.63+12.85X-0.1566X2(方程3)
在另一方面,所公开的低密度纸板可以包括纤维基底和施加到该纤维基底上的涂层以形成涂覆结构,该涂覆结构具有至多约3微米的Parker Print Surf光滑度、纸张厚度和纸张定量,该纸张定量至多约为Y4,其中Y4是以点为单位的纸张厚度(X)的函数,并使用如下的方程4计算:
Y4=3.50+12.41X-0.1513X2(方程4)
在另一方面,所公开的低密度纸板可以包括纤维基底、顶涂层和位于该纤维基底和该顶涂层之间的涂层,该纤维基底、底涂层和该顶涂层形成涂覆结构,其中该涂覆结构具有至多约3微米的Parker PrintSurf光滑度、纸张厚度和纸张定量,该纸张定量至多约为Y5,其中Y5是以点为单位的纸张厚度(X)的函数,并使用如下的方程5计算:
Y5=3.30+11.68X-0.1424X2(方程5)
在另一方面,所公开的低密度纸板可以包括纤维基底和施加到该纤维基底上的涂层以形成涂覆结构,该涂覆结构具有至多约3微米的Parker Print Surf光滑度、纸张厚度和纸张定量,该纸张定量至多约为Y1′,其中Y1′是以点为单位的纸张厚度(X)的函数,并使用如下的方程6计算:
Y1′=36.26+8.342X+0.01629X2(方程6)
在另一方面,所公开的低密度纸板可以包括纤维基底和施加到该纤维基底上的涂层以形成涂覆结构,该涂覆结构具有至多约3微米的Parker Print Surf光滑度、纸张厚度和纸张定量,该纸张定量至多约为Y2′,其中Y2′是以点为单位的纸张厚度(X)的函数,并使用如下的方程7计算:
Y2′=35.55+8.173X+0.01602X2(方程7)
在另一方面,所公开的低密度纸板可以包括纤维基底和施加到该纤维基底上的涂层以形成涂覆结构,该涂覆结构具有至多约3微米的Parker Print Surf光滑度、纸张厚度和纸张定量,该纸张定量至多约为Y3′,其中Y3′是以点为单位的纸张厚度(X)的函数,并使用如下的方程8计算:
Y3′=34.83+8.010X+0.01570X2(方程8)
在另一方面,所公开的低密度纸板可以包括纤维基底和施加到该纤维基底上的涂层以形成涂覆结构,该涂覆结构具有至多约3微米的Parker Print Surf光滑度、纸张厚度和纸张定量,该纸张定量至多约为Y4′,其中Y4′是以点为单位的纸张厚度(X)的函数,并使用如下的方程9计算:
Y4′=33.79+7.769X+0.01524X2(方程9)
在另一方面,所公开的低密度纸板可以包括纤维基底、顶涂层和位于该纤维基底和该顶涂层之间的涂层,该纤维基底、底涂层和该顶涂层形成涂覆结构,其中该涂覆结构具有至多约3微米的Parker PrintSurf光滑度、纸张厚度和纸张定量,该纸张定量至多约为Y5′,其中Y5′是以点为单位的纸张厚度(X)的函数,并使用如下的方程10计算:
Y5′=32.77+7.537X+0.01475X2(方程10)
从以下描述、附图和后附权利要求中,所公开的低密度纸板的其他方面将变得显而易见。
附图说明
图1是某些现有技术纸板材料的纸张定量与纸张厚度的关系图示;
图2是所公开的低密度纸板的一方面的横截面视图;
图3是所公开的低密度纸板的各种示例性方面的纸张定量与纸张厚度的关系图示;
图4是用于制备所公开的低密度纸板的方法的第一方面的图示;
图5是用于制备所公开的低密度纸板的方法的第二方面的图示;
图6是所公开的低密度纸板的各种示例性方面的密度与纸张厚度的关系图示;
图7是具有约10点的纸张厚度的所公开的低密度纸板的示例性方面的密度与Parker Print Surf光滑度的关系图示;
图8是具有约12点的纸张厚度的所公开的低密度纸板的各种示例性方面的密度与Parker Print Surf光滑度的关系图示;
图9是具有约18点的纸张厚度的所公开的低密度纸板的各种示例性方面的密度与Parker Print Surf光滑度的关系图示;
图10是图3中所示各种示例性方面的纸张定量与纸张厚度的另一关系图示。
发明详述
参照图2,所公开的低密度纸板的一方面(通常标记为10)可以包括纤维基底12、底涂层14和顶涂层16。该纸板10可以包括纸张厚度T和在其上可以印刷文字或图形的上表面S。在不脱离本发明的范围的情况下可以使用另外的层。
在一方面,该纤维基底12可以是纸板基底。此处所用的“纸板基底”广义地表示能够涂覆有底涂层的任意纸板材料,且可以是单层式或多层式基底。本领域的技术人员将认识到该纸板基底可以是经漂白或未经漂白的,且典型地是比纸更厚且更具刚性的。通常,纸板基底具有约85磅/3000ft2或更大的未涂覆纸张定量。适合的纸板基底的实例包括瓦楞纸板(corrugating medium)、衬板(linerboard)和固态漂白的硫酸盐纸板(SBS)。在一个特别方面,该纤维基底12可以包括基本上化学(而非机械)处理的纤维,例如基本上100%化学处理的纤维。适合的化学处理的纤维基底12的实例包括固态漂白的硫酸盐纸板或固态未漂白硫酸盐纸板。
在不脱离本发明范围的情况下,可以在该纤维基底12中添加其他组分,例如粘结剂、填料和颜料等。进一步地,该纤维基底12可以基本上不含用于增大松厚度(bulk)的塑性颜料,例如中空塑性颜料或可膨胀的微球,或其他化学蓬松剂。更进一步地,该纤维基底12可以基本不含磨碎的木材颗粒。
该顶涂层16是非必要的层,且可以是任意适合的顶涂层。例如,该顶涂层16可以包括碳酸钙、粘土和各种其他组分,且可以以浆液形式施加到该底涂层14上。顶涂层是本领域技术人员公知的,且在不脱离本发明范围的情况下,可以使用任意常规的或非常规的顶涂层16。
该底涂层14和顶涂层16可以是在不实质降低该纸板10的纸张厚度T的情况下提高该纸板10的表面S的光滑度的任意涂层,由此产生光滑的(例如Parker Print Surf光滑度低于约3.0微米)低密度纸板。本领域的技术人员将认识到该底涂层14以及用于将该底涂层14施加到该纤维基底12上的技术(下面讨论)可能是保持低密度产品的重要因素。
在第一方面,该底涂层14可以是碳酸盐/粘土底涂层。该碳酸盐/粘土底涂层可以包括磨碎的碳酸钙组分、板状粘土组分和各种非必要组分,例如乳胶粘合剂和增稠剂等。该碳酸盐/粘土底涂层可以分散在水中以使其可以以浆液形式使用例如刮刀涂覆机施加到该纤维基底12上,使得该碳酸盐/粘土底涂层基本上填充该纤维基底12中的坑和裂缝而不会实质涂覆该纤维基底12的整个表面。
该磨碎的碳酸钙组分可以是粗的磨碎的碳酸钙,例如可获自Imerys Pigments,Inc.,Roswell,Georgia的CARBITAL60;或非常粗的磨碎的碳酸钙,例如也可获自Imerys Pigments,Inc.的CARBITAL35。该板状粘土组分可以是具有平均为约50∶1的纵横比(即该粘土颗粒的长度或直径与厚度之比)的高纵横比的粘土,例如可获自ImerysPigments,Inc.的CONTOUR1180;或具有平均为约90∶1的纵横比的非常高纵横比的粘土,例如可获自Imerys Pigments,Inc.的XP-6100(也称作BARRISURF X)。
适合的碳酸盐/粘土底涂层和用于将该底涂层施加到纤维基底12上的技术的特定实例公开于2008年3月21日提交的美国序列号61/038,579中,其全部内容通过引用结合进来。
因此,在一方面,可以通过图4中所示的方法20制备低密度纸板10。该方法20可以以顶箱22开始,其可以将纤维浆液排放到Fourdrinier 24中以形成纸幅26。该纸幅26可以通过一个或多个湿压机28,且非必要地通过一个或多个干燥器30。施胶机32可以使用且其可能略微减少该纸幅26的纸张厚度,且非必要的干燥器34可以另外干燥该纸幅26。在一方面,该纸幅26可以通过压延机36,其中辊隙负载显著减少以使纸张厚度的减少最小化或者避免。优选地,该压延机36将会作为干燥压延机运行。在另一方面,可以忽略或绕开该压延机36。然后,该纸幅26可以通过另一非必要的干燥器38并到达第一涂覆机40。该第一涂覆机40可以是刮刀涂覆机等,且可以将该碳酸盐/粘土底涂层14施加到该纸幅26上。非必要的干燥器42可以在在第二涂覆机44处施加任选的顶涂层16之前至少部分干燥该碳酸盐/粘土底涂层14。另一非必要的干燥器46可以完成该干燥过程,然后将该纸幅26前进到非必要的光泽压延机48,并将该纸幅26滚动到卷轴50上。
在第二方面中,该底涂层14可以是施加到该纤维基底12上并然后与辊隙中的已加热表面接触的成膜聚合物溶液,从而使该溶液沸腾并在该膜中产生在该膜干燥后仍保留的空隙,由此产生光滑的表面。该成膜聚合物可以是淀粉,该已加热表面可以是加热的辊。
适合的成膜聚合物的特别实例以及用于将该聚合物施加到纤维基底上的技术公开于2007年2月22日提交的PCT/US07/04742(其全部内容通过引用结合进来)、2007年8月23日提交的美国序列号60/957,478(其全部内容通过引用结合进来)和2007年9月13日提交的PCT/US07/19917(其全部内容通过引用结合进来)中。
因此,在另一方面,可以通过图5中所示的方法60制备低密度纸板10。该方法60可以以顶箱62开始,其可以将纤维浆液排放到Fourdrinier 64中以形成纸幅66。该纸幅66可以通过一个或多个湿压机68,且非必要地通过一个或多个干燥器70。施胶机72可以使用且其可能略微降低该纸幅66的纸张厚度,且非必要的干燥器74可以另外干燥该纸幅66。在一方面,该纸幅66可以通过压延机76,其中辊隙负载显著减小以使纸张厚度的减少最小化或者避免。如果使用,该压延机76可以作为干燥压延机运行。在另一方面,可以忽略或绕开该压延机76。然后,该纸幅66可以通向成膜聚合物的施加78,然后在辊隙中与已加热辊80和压制辊接触以形成在该聚合物膜中具有空隙的光滑表面。在施加和热/压处理该成膜聚合物之后,可以将该纸幅66通过另一非必要的干燥器82并到达第一涂覆机84。该第一涂覆机84可以是刮刀涂覆机等,且可以将常规底涂层(例如作为第二底涂层)施加到该涂覆有淀粉的纸幅66上。非必要的干燥器86可以在于第二涂覆机88处施加非必要的顶涂层之前至少部分干燥该底涂层。另一非必要的干燥器90可以完成干燥,然后将该纸幅66前进到非必要的光泽压延机92,并将最终的产品滚动到卷轴94上。该光泽压延机92可以是软辊隙压延机、硬辊隙压延机,或者可以被忽略或绕过。
在这一点上,本领域的技术人员将认识到该底涂层14、顶涂层16和上述的相关施加技术可以显著提高所制备的纸板10的光滑度,同时在整个涂覆过程中基本维持该纤维基底12的纸张厚度。
实施例
下面呈现了依照本发明制备的光滑的低密度纸板的具体实施例。
实施例1
使用全规模制备方法制备具有约120lb/3000ft2的纸张定量的低密度未涂覆的固态漂白的硫酸盐(SBS)板。
制备具有以下组成的高松厚度碳酸盐/粘土底涂层:(1)50份获自Imerys Pigments,Inc.的高纵横比粘土;(2)50份获自Omya的PG-3(非常粗的磨碎的碳酸钙);(3)19份聚乙酸乙烯酯乳胶(粘合剂)和(4)量足以将该混合物在20rpm在Brookfield粘度计上的粘度提高到2500厘泊的可碱溶胀的合成增稠剂。
制备具有以下组成的顶涂层:50份细碳酸盐;50份细粘土;17份聚乙酸乙烯酯;和次要量的涂覆润滑剂、塑性颜料、蛋白质、分散剂、合成粘度改性剂、脱泡剂和染料。
使用牵引式弯刀施加机在该未涂覆的板上施加底涂层。该底涂层的施加使得需要最少量的底涂层来填充保留在该片上的片粗糙度中的空隙,并同时将过量的底涂层从该片上刮下以在该纤维表面的平面上方留下最少量的底涂层。该底涂层以约6.0lb/3000ft2的涂覆重量施加。在该底涂层上施加顶涂层以进一步改善该表面的光滑度。该顶涂层以约5.4lb/3000ft2的涂覆重量施加。
所得到的涂覆结构具有约130.0lb/3000ft2的总纸张定量,约0.012英寸(12点)的纸张厚度和约1.5微米的Parker Print Surf(PPS 10S)光滑度。
实施例2
使用试制工艺制备具有约186.8lb/3000ft2的纸张定量的低密度未涂覆纸板。
以17%固体浆液形式制备第一底涂层,所述固体浆液以重量计包括97%低分子量乙基化淀粉和3%的基于大豆油的脱模剂。将该浆液以约2.7lb/3000ft2的涂覆重量施加到该未涂覆的纸板的表面上。然后将该经处理的纸板在约430℉的温度和约200磅/线性英寸的压力与抛光的辊接触,由此使该淀粉沸腾并使该纸板的表面成型以复制该辊表面。所得到的涂覆结构具有189.5lb/3000ft2的纸张定量、约18.2点的纸张厚度和约2.95微米的PPS 10S光滑度。
以100份磨碎碳酸钙与16份作为粘合剂的聚乙酸乙烯酯乳胶和约1.5份作为增稠剂的低分子量聚乙烯醇的混合物形式制备第二底涂层。将该第二底涂层以约2.5lb/3000ft2的涂覆重量施加到该涂覆纸板上。所得到的涂覆结构具有191.8lb/3000ft2的纸张定量、约18.1点的纸张厚度和约2.28微米的PPS 10S光滑度。
以70份细粘土、30份细磨碎碳酸钙、20份苯乙烯-丙烯酸乳胶(粘合剂)和约1.5份低分子量聚乙烯醇(增稠剂)的颜料混合物形式制备顶涂层。将该顶涂层以约1.9lb/3000ft2的涂覆重量施加到第二底涂层上。所得到的涂覆结构具有约193.7lb/3000ft2的总纸张定量、约18.2点的纸张厚度和约1.26微米的PPS 10S光滑度。
实施例3
使用上述实施例2中的第一底涂层工艺,用约2.7lb/3000ft2的淀粉涂覆具有约185lb/3000ft2的纸张定量的未涂覆纸板。所得到的涂覆结构具有约187.7lb/3000ft2的总纸张定量、约17.9点的纸张厚度和约2.40微米的PPS 10S光滑度。
实施例4
使用全规模制备工艺制备约112lb/3000ft2的纸张定量的低密度未涂覆纸板。以所述方式以约3.8lb/3000ft2的涂覆重量施加实施例2的底涂层。
以细磨碎碳酸钙和细涂料粘土的85/15混合物与14份聚乙酸乙烯酯乳胶和2份羧甲基纤维素(水溶性增稠剂)的形式制备顶涂层制剂。使用典型的顶涂层施加技术以约6.6lb/3000ft2的涂覆重量将该顶涂层施加在该底涂层上。
所得到的涂覆结构具有约118.5lb/3000ft2的总纸张定量、约10点的纸张厚度和约2.35微米的PPS 10S光滑度。
实施例5
使用实施例2中描述的方法,通过以约3lb/3000ft2的涂覆重量施加淀粉浆液和以约6lb/3000ft2的涂覆重量施加顶涂层来制备涂覆的纸板样品。所得到的涂覆结构具有约141.8lb/3000ft2的纸张定量、约12.8点的纸张厚度和约2.20微米的PPS 10S光滑度。
实施例6
使用全规模制备工艺制备约119lb/3000ft2的纸张定量的低密度未涂覆纸板。以实施例2中描述的第一底涂层制剂和相关工艺以约3lb/3000ft2的涂覆重量用淀粉浆液涂覆该未涂覆纸板。收集没有顶涂层的样品1和2。样品3和4以约8~9lb/3000ft2涂覆重量接收顶涂层,所述顶涂层是实施例2中所述的顶涂层制剂。样品4还经过典型的光泽压延工艺。所得到的数据示于表1中:
表1
样品 纸张厚度(点) 纸张定量(lb/令) PPS 10S(微米)
1 11.1 121.7 2.31
2 11 120.8 2.5
3 11.5 130 2.29
4 11.6 130 1.38
图6中描绘了实施例1~6的密度(即纸张定量除以纸张厚度)与纸张厚度数据的关系,以及现有技术纸板的密度与纸张厚度数据的关系。本领域技术人员将认识到当依照本发明制备纸板时达到了显著更低的密度。本领域技术人员还将认识到密度是纸张厚度的函数,因此在评价PPS时人们应当分开比较各个的纸张厚度。
图7显示了依照本发明的10点纸板(实施例4)的密度与ParkerPrint Surf光滑度的关系,与现有技术的10点纸板的密度与Parker PrintSurf光滑度的关系相比描绘。图8显示了12点纸板(取自实施例1~6)的密度与Parker Print Surf光滑度的关系,与现有技术的12点纸板的密度与Parker Print Surf光滑度的关系相比描绘。图9显示了18点纸板(取自实施例1~6)的密度与Parker Print Surf光滑度的关系,与现有技术的18点纸板的密度与Parker Print Surf光滑度的关系相比描绘。本领域技术人员将认识到本发明的纸板与现有技术相比具有显著更低的密度,同时保持光滑度(即低Parker Print Surf光滑度值)。
图3中描绘了实施例1~6的纸张定量与纸张厚度数据的关系以及现有技术纸板(图1)的纸张定量与纸张厚度数据的关系。实施例1~6的所有数据点在方程1描绘的曲线Y1下方,而发现所有现有技术数据都在曲线Y1上方。进一步地,所公开的实施例的八个数据点在方程2描绘的曲线Y2下方,六个数据点在方程3描绘的曲线Y3的下方,两个数据点在方程4描绘的曲线Y4的下方。
类似地,图10中描绘了依照本发明制备的纸板的纸张定量与纸张厚度数据的关系以及现有技术纸板的纸张定量与纸张厚度数据的关系。所有数据点都在方程6描绘的曲线Y1′的下方,而发现所有现有技术数据都在曲线Y1′的上方。进一步地,数个数据点在方程7描绘的曲线Y2′的下方,数个更多的数据点在方程8描绘的曲线Y3′的下方,其他在方程9描绘的曲线Y4′的下方。
尽管图3和10中目前呈现了各种纸张厚度范围的纸张定量数据,但本领域技术人员将认识到因为在约10、11、12、13和18点纸张厚度时所公开的涂层和技术能够达到令人惊奇得低的密度,因此预期在其他纸张厚度时可以达到类似的低密度。
因此,本发明的纸板提供了所需的光滑度(例如PPS 10S光滑度低于3微米,甚至低于1.5微米),同时保持低纸板密度(例如纸张定量低于所公开的作为纸张厚度函数的阈值)。尽管一直希望拥有这种纸板,但我们相信在现有技术中尚不能得到这种纸板。
尽管已经显示和描述了所公开的低密度纸板的各方面,在在阅读本说明书之后本领域技术人员可以进行改变。本专利申请包括这种改变且仅由权利要求的范围限定。
Claims (18)
1.纸板,包括:
固态漂白的硫酸盐纸板基底;和
施加到所述纸板基底上的涂层以形成涂覆结构,所述涂覆结构具有纸张定量、纸张厚度和Parker Print Surf光滑度,所述Parker PrintSurf光滑度为至多3微米,所述纸张定量为至多Y2磅/3000ft2,其中Y2是以点为单位的所述纸张厚度(X)的函数,且如下计算:
Y2=3.71+13.14X-0.1602X2。
2.权利要求1的纸板,其中所述涂层包括至少底涂层和顶涂层,其中所述底涂层位于所述顶涂层和所述固态漂白的硫酸盐纸板基底之间。
3.权利要求2的纸板,其中所述涂层进一步包括位于所述底涂层和所述顶涂层之间的中间涂层。
4.权利要求1的纸板,其中所述涂层包括淀粉。
5.权利要求1的纸板,其中所述涂层包括粗的磨碎的碳酸钙和高纵横比粘土。
6.权利要求1的纸板,其中所述纸张定量至多为Y3磅/3000ft2,其中Y3如下计算:
Y3=3.63+12.85X-0.1566X2。
7.权利要求1的纸板,其中所述纸张定量至多为Y4磅/3000ft2,其中Y4如下计算:
Y4=3.50+12.41X-0.1513X2。
8.权利要求1的纸板,其中所述Parker Print Surf光滑度至多为2.5微米。
9.权利要求1的纸板,其中所述Parker Print Surf光滑度至多为2.0微米。
10.权利要求1的纸板,其中所述Parker Print Surf光滑度至多为1.5微米。
11.权利要求1的纸板,其中所述涂层包括至少一种颜料,和其中所述涂层中每种所述颜料是无机颜料。
12.权利要求1的纸板,限制条件是所述固态漂白的硫酸盐纸板基底不含化学蓬松剂。
13.权利要求1的纸板,其中所述固态漂白的硫酸盐纸板基底具有至少85磅/3000ft2的纸张定量。
14.权利要求1的纸板,其中所述固态漂白的硫酸盐纸板基底是单层式基底。
15.权利要求1的纸板,其中所述固态漂白的硫酸盐纸板基底基本上由化学纸浆组成。
16.纸板,包括:
固态漂白的硫酸盐纸板基底,其中所述基底不含化学蓬松剂;和
施加到所述纸板基底上的涂层以形成涂覆结构,所述涂覆结构具有纸张定量、纸张厚度和Parker Print Surf光滑度,所述Parker PrintSurf光滑度为至多3微米,所述纸张定量为至多Y2′磅/3000ft2,其中Y2′是以点为单位的所述纸张厚度(X)的函数,且如下计算:
Y2′=35.55+8.173X+0.01602X2。
17.权利要求16的纸板,其中所述纸张定量至多为Y3′磅/3000ft2,其中Y3′如下计算:
Y3′=34.83+8.010X+0.01570X2。
18.权利要求16的纸板,其中所述纸张定量至多为Y4′磅/3000ft2,其中Y4′如下计算:
Y4′=33.79+7.769X+0.01524X2。
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US5671208P | 2008-05-28 | 2008-05-28 | |
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US12/412773 | 2009-03-27 | ||
US12/412,773 US7749583B2 (en) | 2008-05-28 | 2009-03-27 | Low density paperboard |
PCT/US2009/038865 WO2009146023A1 (en) | 2008-05-28 | 2009-03-31 | Low density paperboard |
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EP (1) | EP2286027B1 (zh) |
JP (1) | JP5291189B2 (zh) |
KR (1) | KR20110017861A (zh) |
CN (1) | CN102046881B (zh) |
AU (1) | AU2009251658B2 (zh) |
BR (1) | BRPI0909577B1 (zh) |
CA (1) | CA2725849A1 (zh) |
CL (1) | CL2009001286A1 (zh) |
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CA2725849A1 (en) | 2009-12-03 |
RU2490387C2 (ru) | 2013-08-20 |
US7749583B2 (en) | 2010-07-06 |
WO2009146023A1 (en) | 2009-12-03 |
AU2009251658A1 (en) | 2009-12-03 |
JP5291189B2 (ja) | 2013-09-18 |
CN102046881A (zh) | 2011-05-04 |
JP2011522135A (ja) | 2011-07-28 |
MX2010012918A (es) | 2010-12-20 |
TW201000715A (en) | 2010-01-01 |
AU2009251658B2 (en) | 2014-01-30 |
CL2009001286A1 (es) | 2010-11-12 |
KR20110017861A (ko) | 2011-02-22 |
BRPI0909577B1 (pt) | 2018-11-21 |
US20090297808A1 (en) | 2009-12-03 |
PL2286027T3 (pl) | 2017-08-31 |
BRPI0909577A2 (pt) | 2016-08-09 |
EP2286027A1 (en) | 2011-02-23 |
EP2286027B1 (en) | 2016-05-11 |
RU2010153551A (ru) | 2012-07-10 |
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