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公开(公告)号：US5505820A
公开(公告)日：1996-04-09
申请号：US371206
申请日：1995-01-11
CPC分类号： D21G1/00
摘要： A paper rawstock web is wet densified on a papermachine at a moisture content greater than about 20% and less than about 50%, and preferably from about 25-35%, in a calender device at nip pressures greater than about 3000 psi, and preferably within the range of from about 3000-6000 psi, to provide fiber springback resistance and irreversibly smooth surfaces which are substantially resistant to loss of smoothness upon rewetting, as for example in a subsequent surface sizing or coating process. Wet densification according to the present invention produces a web having greater density and increased internal bond strength, as compared with webs treated by conventionally known methods, to achieve the irreversibly smooth surfaces.
摘要翻译： 在压纸机装置中，在大于约3000psi的压区压力下，纸张原料纤维网在造纸机上以湿含量大于约20％且小于约50％，优选约25-35％的湿度致密化， 在约3000-6000psi的范围内，以提供光纤回弹电阻和不可逆光滑的表面，其基本上耐再次润湿时的平滑度的损失，例如在随后的表面施胶或涂布过程中。 与通过常规已知方法处理的纤维网相比，根据本发明的湿致密化产生具有更大密度和增加的内部粘结强度的网，以实现不可逆的平滑表面。
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公开(公告)号：US4670102A
公开(公告)日：1987-06-02
申请号：US817111
申请日：1986-01-08
CPC分类号： D21G1/00
摘要： A tandem calender is provided at the output end of a paper machine which includes two single stack nips in-line. The first nip is formed by a pair of steel rolls which are lightly loaded and the second nip is formed by a steel roll and a plastic covered roll which is loaded 2-10 times greater than the first nip.
摘要翻译： 在造纸机的输出端提供串联压光机，其包括两个单个堆叠夹头。 第一压区是由一对钢辊形成的，它们是轻负载的，第二辊隙由钢辊和塑料覆盖辊形成，该辊与第一辊隙相比加载2-10倍。
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