公开(公告)号：US06802938B2

公开(公告)日：2004-10-12

申请号：US09770340

申请日：2001-01-26

申请人： Kosaraju Krishna Mohan ,  Alexander A. Koukoulas

发明人： Kosaraju Krishna Mohan ,  Alexander A. Koukoulas

IPC分类号： D21H1972

CPC分类号： D21H21/54 ,  D21H19/20 ,  D21H19/22 ,  D21H19/28 ,  D21H27/10 ,  Y10T428/1303 ,  Y10T428/1348 ,  Y10T428/24355 ,  Y10T428/24455 ,  Y10T428/25 ,  Y10T428/254 ,  Y10T428/273 ,  Y10T428/277 ,  Y10T428/2985 ,  Y10T428/31902 ,  Y10T428/31989 ,  Y10T428/31993

摘要： The invention provides a low density paperboard material and associated method for use in producing an insulated container, and is especially well-suited for making cups. The paperboard material comprises a paperboard web including wood fibers and expanded microspheres, and has a relatively low density ranging from about 6 to about 10 lb/3MSF/mil, a relatively high caliper ranging from about 24 to about 35 mil, and an internal bond strength of at least about 80×10−3 ft-lbf., preferably at least 100×10−3 lft-lbf. For applications such as cups the material is also coated on one or both sides with a barrier coating, preferably low density polyethylene, to limit liquid penetration into the web. The low density paperboard material of the invention is convertible for manufacture of containers, particularly cups, and exhibits insulative properties comparable to higher cost materials conventionally used to make cups. Also, the surface of the low density board may have a Sheffield smoothness of 300 SU or greater compared with the surface smoothness of 160 to 200 SU for conventional cupstock, the latter having been thought necessary for adequate print quality. However, it has been found that the low density board exhibits good printability on flexo printing machines despite its relatively rough surface, which is surprising and bonus effect realized along with the insulative and other properties of the board.

摘要翻译： 本发明提供一种用于制造隔热容器的低密度纸板材料和相关方法，特别适用于制造杯子。 纸板材料包括包含木纤维和膨胀微球的纸板网，并且具有约6至约10lb / 3MSF / mil的相对较低的密度，约24至约35密耳的相对较高的厚度，以及内部键 至少约80×10 -3 ft-lbf，优选至少100×10 -3ft-lbf的强度。 对于诸如杯子的应用，材料也在一侧或两侧上涂覆有阻隔涂层，优选低密度聚乙烯，以限制液体渗透到网中。 本发明的低密度纸板材料可转换用于制造容器，特别是杯子，并具有与常规用于制造杯子的较高成本材料相当的绝缘性能。 此外，低密度板的表面可以具有300SU或更大的谢菲尔德平滑度，与常规杯状物的160至200SU的表面平滑度相比，后者被认为对于足够的打印质量是必要的。 然而，已经发现低密度板在柔版印刷机上表现出良好的印刷性，尽管其表面相对粗糙，这与板的绝缘性和其它性能一起实现了令人惊奇的效果。

公开(公告)号：US06248212B1

公开(公告)日：2001-06-19

申请号：US09000584

申请日：1997-12-30

申请人： Ralph L. Anderson ,  Tom C. Saffel

发明人： Ralph L. Anderson ,  Tom C. Saffel

IPC分类号： D21H1972

CPC分类号： D21F11/145 ,  D21F11/14 ,  D21H11/14 ,  D21H25/005

摘要： A web structure is formed by a process including first through-air drying the fibrous web comprising at least about 20% non-premium fiber, next applying a bonding material to the fibrous web, and next creping the fibrous web to form the web structure having a BLK/BW and CCDWT at least 85% of a wet-pressed web structure comprising 100% premium fiber. The web structure may alternatively or in addition to have a TWA and/or BLK/BW greater than the TWA and/or BLK/BW of a through-air-dried, bonded, and creped web structure comprising 100% premium fiber. The process may be repeated on the second side. The web structure may comprise a combination of hardwood, softwood, CTMP, and/or recycled fibers. The web structure may include at least about 40% recycled fibers.

摘要翻译： 纤维网结构通过一种方法形成，该方法包括首先通过干燥包含至少约20％非优质纤维的纤维网，然后将粘合材料施加到纤维网上，然后将纤维网起皱以形成纤维网结构， BLK / BW和CCDWT至少85％的包含100％优质纤维的湿压网状结构。 纤维网结构可以替代地或另外具有大于通过空气干燥，粘合和起皱的纤维网结构的TWA和/或BLK / BW的TWA和/或BLK / BW，其包含100％优质纤维。 该过程可以在第二侧重复。 网状结构可以包括硬木，软木，CTMP和/或再循环纤维的组合。 纤维网结构可以包括至少约40％的再循环纤维。