CN105350378B - 一种字帖临摹纸造纸工艺 - Google Patents
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Abstract
本发明提供了一种字帖临摹纸造纸工艺,包括以下工序:木浆碎解、打浆、配浆、筛选净化、上网成型、压榨、烘干,其特征在于:木浆为长纤维木浆和短纤维木浆,重量配比为:70-90:10-30;所述打浆工序中,打浆度控制在65‑70°SR,打浆湿重控制在8.5‑9.5g,打浆浓度控制在4.0‑4.5%,所述配浆工序中加入湿强剂,所述打浆工序中加入干强剂,上网成型工序前加入分散剂和中性施胶剂。由于采用了上述技术方案,本发明严格控制打浆度、打浆湿重和打浆浓度,可使产品纸张均匀性能好,保证纸张各项物理指标的稳定性。
Description
技术领域
本发明涉及一种,具体的说涉及一种字帖临摹纸造纸工艺。
背景技术
造纸产业是与国民经济和社会事业发展关系密切的重要基础原材料产业,纸及纸板的消费水平是衡量一个国家现代化水平和文明程度的标志。其中工艺纸作为造纸行业中的特种纸也迎来快速发展的历史机遇,特别是用于学生练习钢笔字帖的字帖临摹纸在国际国内市场更是需求旺盛,还有很大的发展空间。尤其是小孩子刚刚进入校园,接触写字的时间较短,没有形成自己的书写个性,为了引导孩子正确书写出美观好看的汉字,字帖对于孩子来说是一种比较有效的练习方式,孩子通过临摹书写,慢慢就会适应字的写法,从而书写出具有风格的字来。而现有产品由于设备陈旧、工艺落后及管理理念等多方面的原因一直处于中低档纸的水平,其强度、透气性、透明度、均匀性等主要指标还不能完全满足高端市场需求。因此研发一种用于练习钢笔字帖的字帖临摹纸以适应国际国内高端市场需求早已是迫在眉睫。
发明内容
本发明要解决的技术问题是克服上述缺陷,提供一种高强度、高透气性、高透明度、均匀性好的字帖临摹纸造纸工艺。
为解决上述问题,本发明所采用的技术方案是:
一种字帖临摹纸造纸工艺,包括以下工序:木浆碎解、打浆、配浆、筛选净化、上网成型、压榨、烘干,其特征在于:木浆为长纤维木浆和短纤维木浆,重量配比为:70-90:10-30;所述打浆工序中,打浆度控制在65-70°SR,打浆湿重控制在8.5-9.5g,打浆浓度控制在4.0-4.5%。
作为一种改进:打浆方式采取长纤维粘状打浆。
作为一种改进:所述配浆工序中加入湿强剂,用量为5-10kg/吨纸。通过加入湿强剂,其作用机理一是保护原有的纤维间的结合,湿强剂在纤维周围形成一个交错的链状网络结构,阻止纤维的吸水润胀以保持原有的纤维间的氢键结合。二是产生新的抗水纤维结合键,湿强剂与纸浆纤维交联形成了新的共价键、氢键等抗水结合键,从而增加了纤维结合强度,得到较高的纸页强度。
作为一种改进:所述湿强剂为聚酰胺-环氧氯丙烷树脂,固含量12.5%,加入造纸湿强剂时,先将其在水中稀释为浓度0.8—1.2%的溶液,然后缓慢加入,并搅拌均匀。
作为一种改进:所述打浆工序中加入干强剂,用量为20-40kg/吨纸。通过加入干强剂,其作用机理—通过阳离子与纤维上的阴离子形成离子键,酰胺基与纤维上的羟基形成大量氢键,从而有效提高纸张的干强度,能使各项强度物理指标有效提高,同时提高细小纤维留着率和纸页滤水性。
作为一种改进:所述干强剂为聚丙烯酰胺,加入造纸干强剂时,先将其在水中稀释为浓度0.8—1.2%的溶液,然后缓慢加入,并搅拌均匀。
作为一种改进:所述上网成型工序前加入分散剂,用量为0.15-0.3kg/吨纸。通过加入造纸分散剂,改变了纤维悬浮液的流变特性,使其具有较低的雷诺系数,即流动状态较为有序,亦即纤维随流体流动的能力增加,从而减少了纤维的相对运动,也就减少了纤维间相互碰撞而产生的絮聚。利用长纤维抄纸,如果不加一定的黏液,使纤维之间形成一定的膜层,在搅拌过程中纤维之间易产生绕结。另外,长纤维纸浆上网时脱水快,要求黏液有高度的黏性和弹性,即具有反过滤性能,延缓脱水,使纸张匀度提高。从而保证长纤维抄造所要达成的维持高强度、降低纸张紧度提高透气性及吸水性的目标实现。
作为一种改进:所述分散剂为聚氧化乙烯,相对分子量300-500万,加入造纸分散剂时,先将其在水中溶解为浓度0.8—1.2%的溶液,然后缓慢加入。
作为一种改进:所述上网成型工序前加入中性施胶剂,用量为25-30kg/吨纸。通过加入中性施胶剂,其作业机理—中性施胶剂解决了由于酸性施胶引起的纸页泛黄、发脆等问题,同时提高纸页的平滑度、能显著改善纸页的印刷适应性和油墨吸收性,适应了油墨技术的发展,同时减少白水负荷,降低能耗,改善操作环境。
作为一种改进:所述中性施胶剂为烷基乙烯酮二聚体。
由于采用了上述技术方案,本发明严格控制打浆度、打浆湿重和打浆浓度,可使产品纸张均匀性能好,保证纸张各项物理指标的稳定性。
下面结合附图和实施例对本发明作进一步说明。
附图说明
附图1为本发明的工艺流程框图。
具体实施方式
实施例1:
将长纤维木浆和短纤维木浆,重量配比为70:30,通过水力碎浆机碎解,加入打浆酶,调整水温50℃,反应时间30min,采用计量泵定量添加,用量为5kg/吨纸。再经双盘磨浆机进行打浆,打浆方式采取长纤维粘状打浆,要求纤维高度分丝帚化、润胀和细纤维化,尽量避免切断纤维以保持纤维的高强度,采用逐步加重、分段下刀、长时间打浆的方法,打成的纸料有滑腻的感觉,在网上难于脱水,上网浓度也低,打浆度控制在65°SR,打浆浓度控制在4.0%,湿重控制在8.5g,制得纸浆。
转入配料池进行配浆,配浆时,按5kg/吨纸的用量加入湿强剂,操作时,首先将该湿强剂在水中稀释为浓度0.8%的溶液,然后缓慢加入,并搅拌均匀;按吨纸20kg的用量加入干强剂,操作时,首先将该干强剂在水中稀释为浓度0.8%的溶液,然后缓慢加入,并搅拌均匀。
转入抄前池稀释、筛选、净化。经高位箱加入分散剂,用量为0.15kg/吨纸,操作时,首先将该分散剂在水中溶解为浓度0.8%的溶液,然后缓慢加入;加入中性施胶剂,用量为25kg/吨纸。再通过流浆箱,均匀地喷射到成型网上,经真空抽吸后,脱去部分水分,然后转至压榨工序,进一步压榨脱水后,再进入烘干工序,通入饱和蒸汽进行干燥脱水,制得纸页;再经卷取、切纸,包装得成品。
该字帖临摹纸主要技术指标如下方表格所示:
定量 | 吸收性 | 透光率 | 78% | ||
湿强度 | 0.15KN/m | 抗张强度 | 1.05KN/m | ||
灰分 | 0.8% | 水分 | 5.5% |
实施例2:
将长纤维木浆和短纤维木浆,重量配比为90:10,通过水力碎浆机碎解,加入打浆酶,调整水温40℃,反应时间35min,采用计量泵定量添加,用量为8kg/吨纸。再经双盘磨浆机进行打浆,打浆方式采取长纤维粘状打浆,要求纤维高度分丝帚化、润胀和细纤维化,尽量避免切断纤维以保持纤维的高强度,采用逐步加重、分段下刀、长时间打浆的方法,打成的纸料有滑腻的感觉,在网上难于脱水,上网浓度也低,打浆度控制在68°SR,打浆浓度控制在4.2%,湿重控制在9g,制得纸浆。
转入配料池进行配浆,配浆时,按7.5kg/吨纸的用量加入湿强剂,操作时,首先将该湿强剂在水中稀释为浓度1.0%的溶液,然后缓慢加入,并搅拌均匀;按吨纸30kg的用量加入干强剂,操作时,首先将该干强剂在水中稀释为浓度1.0%的溶液,然后缓慢加入,并搅拌均匀。
转入抄前池稀释、筛选、净化。经高位箱加入分散剂,用量为0.25kg/吨纸,操作时,首先将该分散剂在水中溶解为浓度1%的溶液,然后缓慢加入;加入中性施胶剂,用量为28kg/吨纸。再通过流浆箱,均匀地喷射到成型网上,经真空抽吸后,脱去部分水分,然后转至压榨工序,进一步压榨脱水后,再进入烘干工序,通入饱和蒸汽进行干燥脱水,制得纸页;再经卷取、切纸,包装得成品。
该字帖临摹纸主要技术指标如下方表格所示:
定量 | 吸收性 | 透光率 | 79% | ||
湿强度 | 0.12KN/m | 抗张强度 | 1.15KN/m | ||
灰分 | 0.7% | 水分 | 5.7% |
实施例3:
将长纤维木浆和短纤维木浆,重量配比为80:20,通过水力碎浆机碎解,加入打浆酶,调整水温60℃,反应时间40min,采用计量泵定量添加,用量为12kg/吨纸。再经双盘磨浆机进行打浆,打浆方式采取长纤维粘状打浆,要求纤维高度分丝帚化、润胀和细纤维化,尽量避免切断纤维以保持纤维的高强度,采用逐步加重、分段下刀、长时间打浆的方法,打成的纸料有滑腻的感觉,在网上难于脱水,上网浓度也低,打浆度控制在70°SR,打浆浓度控制在4.5%,湿重控制在9.5g,制得纸浆。
转入配料池进行配浆,配浆时,按10kg/吨纸的用量加入湿强剂,操作时,首先将该湿强剂在水中稀释为浓度1.2%的溶液,然后缓慢加入,并搅拌均匀;按吨纸40kg的用量加入干强剂,操作时,首先将该干强剂在水中稀释为浓度1.2%的溶液,然后缓慢加入,并搅拌均匀。
转入抄前池稀释、筛选、净化。经高位箱加入分散剂,用量为0.3kg/吨纸,操作时,首先将该分散剂在水中溶解为浓度1.2%的溶液,然后缓慢加入;加入中性施胶剂,用量为30kg/吨纸。再通过流浆箱,均匀地喷射到成型网上,经真空抽吸后,脱去部分水分,然后转至压榨工序,进一步压榨脱水后,再进入烘干工序,通入饱和蒸汽进行干燥脱水,制得纸页;再经卷取、切纸,包装得成品。
该字帖临摹纸主要技术指标如下方表格所示:
定量 | 吸收性 | 透光率 | 75% | ||
湿强度 | 0.11KN/m | 抗张强度 | 1.17KN/m | ||
灰分 | 0.8% | 水分 | 5.9% |
本发明的工艺中,通过加入打浆酶,其作用机理—通过有限降解纤维细胞壁的纤维素,有助于细胞壁的剥离,促进纤维分丝帚化或切断,有效降低磨浆能耗;纤维初生壁和次生壁外层的破坏,促使次生壁内层帚化和纤维润胀,增加纤维间的结合力,提高成纸强度指标。
其中,所述湿强剂为聚酰胺-环氧氯丙烷树脂,固含量12.5%,加入造纸湿强剂时。所述干强剂为聚丙烯酰胺。所述分散剂为聚氧化乙烯,相对分子量300-500万。所述中性施胶剂为烷基乙烯酮二聚体。
Claims (8)
1.一种字帖临摹纸造纸工艺,包括以下工序:木浆碎解、打浆、配浆、筛选净化、上网成型、压榨、烘干,其特征在于:木浆为长纤维木浆和短纤维木浆,重量配比为:70-90:10-30;所述打浆工序中,打浆度控制在65-70°SR,打浆湿重控制在8.5-9.5g,打浆浓度控制在4.0-4.5%,所述配浆工序中加入湿强剂,所述打浆工序中加入干强剂,上网成型工序前加入分散剂和中性施胶剂,所述中性施胶剂用量为25-30kg/吨纸,所述中性施胶剂为烷基乙烯酮二聚体。
2.根据权利要求l所述的字帖临摹纸造纸工艺,其特征在于:打浆方式采取长纤维粘状打浆。
3.根据权利要求l所述的字帖临摹纸造纸工艺,其特征在于:所述湿强剂用量为5-10kg/吨纸。
4.根据权利要求3所述的字帖临摹纸造纸工艺,其特征在于:所述湿强剂为聚酰胺-环氧氯丙烷树脂,固含量12.5%,加入造纸湿强剂时,先将其在水中稀释为浓度0.8—1.2%的溶液,然后缓慢加入,并搅拌均匀。
5.根据权利要求l所述的字帖临摹纸造纸工艺,其特征在于:所述干强剂用量为20-40kg/吨纸。
6.根据权利要求5所述的字帖临摹纸造纸工艺,其特征在于:所述干强剂为聚丙烯酰胺,加入造纸干强剂时,先将其在水中稀释为浓度0.8—1.2%的溶液,然后缓慢加入,并搅拌均匀。
7.根据权利要求l所述的字帖临摹纸造纸工艺,其特征在于:所述分散剂用量为0.15-0.3kg/吨纸。
8.根据权利要求l所述的字帖临摹纸造纸工艺,其特征在于:所述分散剂为聚氧化乙烯,相对分子量300-500万,加入造纸分散剂时,先将其在水中溶解为浓度0.8—1.2%的溶液,然后缓慢加入。
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