公开(公告)号：US06497790B2

公开(公告)日：2002-12-24

申请号：US09877614

申请日：2001-06-08

申请人： K. Krishna Mohan ,  Michael J. Smith ,  Alexander A. Koukoulas

发明人： K. Krishna Mohan ,  Michael J. Smith ,  Alexander A. Koukoulas

IPC分类号： D21H2504

CPC分类号： D21G1/006 ,  D21G1/0093 ,  Y10T428/24322 ,  Y10T428/2438 ,  Y10T428/31

摘要： A paperboard product having at least one layer of bleached or semi-bleached pulp and having improved smoothness and reduced bulk loss. For paperboard having sizing without pigment, the smoothness on the printed side, measured by the Parker test is better (lower) than 6.5 when measured using a pressure of 10 kgf/cm2 while the smoothness measured by the Hagerty/Sheffield test is not below 280 Sheffield units. For paperboard having sizing with pigment, the Parker smoothness is less than 5.0 and the Hagerty/Sheffield smoothness is not less than 180 Sheffield units. The web is finished by applying temperature and moisture gradients, then smoothing the web surface using extended nip calendering. The surface temperature of the calendering roll is maintained at 250-400° F. Prior to entering the extended nip, the web surface is moisturized using steam showers. The nipload applied in the heated extended nip is preferably between 300 to 2,500 pli.

摘要翻译： 一种纸板产品，其具有至少一层漂白或半漂白纸浆并具有改善的平滑度和减少的体积损失。 对于没有颜料的尺寸的纸板，当使用10kgf / cm 2的压力测量时，通过Parker测试测量的印刷面上的平滑度优于6.5，而通过Hagerty / Sheffield测试测量的平滑度不低于280 谢菲尔德单位。 对于具有颜料尺寸的纸板，Parker平滑度小于5.0，Hagerty / Sheffield平滑度不低于180谢菲尔德单位。 通过施加温度和湿度梯度来完成幅材，然后使用延长的压区压光来平整纸幅表面。 压延辊的表面温度保持在250-400°F。在进入延伸压区之前，使用蒸汽淋浴来对网表面进行增湿。 施加在加热的延伸辊隙中的夹紧压力优选在300至2,500pli之间。

公开(公告)号：US06287424B1

公开(公告)日：2001-09-11

申请号：US09158483

申请日：1998-09-22

申请人： K. Krishna Mohan ,  Michael J. Smith ,  Alexander A. Koukoulas

发明人： K. Krishna Mohan ,  Michael J. Smith ,  Alexander A. Koukoulas

IPC分类号： D21H2512

CPC分类号： D21G1/006 ,  D21G1/0093 ,  Y10T428/24322 ,  Y10T428/2438 ,  Y10T428/31

摘要： A paperboard product having at least one layer of bleached or semi-bleached pulp and having improved smoothness and reduced bulk loss. For paperboard having sizing without pigment, the smoothness on the printed side as measured by the Parker test is better (lower) than 6.5 when measured using a pressure of 10 kgf/cm2 while the smoothness measured by the Hagerty/Sheffield test is not below 280 Sheffield units. For paperboard having sizing with pigment, the Parker smoothness is less than 5.0 and the Hagerty/Sheffield smoothness is not less than 180 Sheffield units. The web is finished by applying temperature and moisture gradients to the web and then smoothing the web surface using extended nip calendering. The surface of the calendering roll is maintained at a temperature of 250-400° F. Prior to entering the extended nip, the web surface is moisturized using steam showers. The nipload applied in the heated extended nip is preferably in the range of 300 to 2,500 pli.

摘要翻译： 一种纸板产品，其具有至少一层漂白或半漂白纸浆并具有改善的平滑度和减少的体积损失。 对于没有颜料尺寸的纸板，当使用10kgf / cm2的压力测量时，通过Parker测试测量的印刷面上的平滑度优于6.5，而通过Hagerty / Sheffield测试测量的平滑度不低于280 谢菲尔德单位。 对于具有颜料尺寸的纸板，Parker平滑度小于5.0，Hagerty / Sheffield平滑度不低于180谢菲尔德单位。 通过将温度和湿度梯度施加到幅材上，然后使用延长的压区压光来平整纸幅表面来完成纸幅。 压延辊的表面保持在250-400°F的温度。在进入延伸压区之前，使用蒸汽淋浴来对网表面进行增湿。 施加在加热的延伸辊隙中的夹紧压力优选在300至2,500pli的范围内。

公开(公告)号：US06190500B1

公开(公告)日：2001-02-20

申请号：US09165947

申请日：1998-10-02

申请人： K. Krishna Mohan ,  Michael J. Smith ,  Alexander A. Koukoulas

发明人： K. Krishna Mohan ,  Michael J. Smith ,  Alexander A. Koukoulas

IPC分类号： D21H1100

CPC分类号： D21G1/006 ,  D21F11/04 ,  D21H19/12 ,  D21H19/54 ,  D21H19/60 ,  D21H23/32 ,  D21H25/14 ,  D21H27/38

摘要： A multilayer linerboard product having a top layer made up of bleached/unbleached virgin or recycled pulp and at least one bottom layer made up of unbleached pulp. The external surface of the top layer has reduced gloss mottle and improved printing properties. In particular, the top surface of the multilayer linerboard has a Parker smoothness less than 6.5 and a Hagerty/Sheffield smoothness in the range of 240 to 280. Print voids on a flexo printed product are less than 0.20% (by area) as measured by image analysis. These improvements are achieved in an extended nip calender section having a heated calender roll, a backing roll or shoe and a conformable belt. Preferably, the nip width is 1 to 25 cm. The temperature of the surface of the heated calender roll is preferably maintained in the range of 300 to 500° F. The nipload between the heated calender roll and the conformable belt is preferably maintained in the range of 500 to 2,500 pli.

摘要翻译： 一种多层衬板产品，其具有由漂白/未漂白的原始或再循环纸浆构成的顶层和由未漂白纸浆构成的至少一个底层。 顶层的外表面具有减少的光泽斑点和改善的印刷性能。 特别地，多层衬板的顶表面具有小于6.5的帕克平滑度和240至280范围内的Hagerty / Sheffield平滑度。柔版印刷产品上的打印孔隙小于0.20％（面积），由 图像分析。 这些改进在具有加热砑光辊，背衬辊或鞋和适形带的延伸辊隙压延部中实现。 优选地，辊隙宽度为1至25cm。 加热砑光辊的表面的温度优选保持在300至500°F的范围内。加热的压延辊和适形带之间的夹紧力优选保持在500至2,500pli的范围内。

公开(公告)号：US06274001B1

公开(公告)日：2001-08-14

申请号：US08955135

申请日：1997-10-21

申请人： K. Krishna Mohan

发明人： K. Krishna Mohan

IPC分类号： D21H2500

CPC分类号： D21G1/0093 ,  D21G1/00

摘要： A calendering method which enhances the smoothness of surface sized paper/paperboard by a combination of temperature and moisture gradient calendering processes without the fiber sticking/picking problems that affect runnability and without using waterboxes. The moisture gradient calendering is performed so that the cross direction moisture profile can be corrected and high smoothness levels can be obtained. Heated calender rolls form a hot pressure nip having a temperature greater than the temperature of the moisturized web. Lubricant is applied to both sides of the web to prevent fiber sticking/picking in the hot nip. The lubricant may be applied by the size press, by the moisturizing showers or by separate lubricant showers. The smoothness developed by moisturizing and hot nip calendering is substantially irreversible.

摘要翻译： 一种压延方法，其通过温度和湿度梯度压光过程的组合来增强表面尺寸的纸/纸板的光滑度，而不会影响影响运行性能并且不使用水箱的纤维粘附/挑选问题。 进行湿度梯度压光，使得可以校正横向水分分布并且可以获得高平滑度水平。 加热砑光辊形成温度高于保湿网的温度的热压力辊隙。 将润滑剂施加到网的两侧以防止在热压区中的纤维粘附/拾取。 润滑剂可以通过压力机，保湿淋浴器或分开的润滑剂淋浴器施加。 通过保湿和热压区压延开发的平滑度基本上是不可逆的。