CN107476128B - 一种数码转印纸的生产工艺 - Google Patents

一种数码转印纸的生产工艺 Download PDF

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CN107476128B
CN107476128B CN201710580561.7A CN201710580561A CN107476128B CN 107476128 B CN107476128 B CN 107476128B CN 201710580561 A CN201710580561 A CN 201710580561A CN 107476128 B CN107476128 B CN 107476128B
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张凤山
刘燕韶
李晓亮
魏文光
张金芝
周景蓬
冯好伟
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SHANDONG HUATAI PAPER CO Ltd
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    • DTEXTILES; PAPER
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Abstract

本发明涉及制浆造纸领域,具体来说是一种数码转印纸的生产工艺,该工艺以废纸脱墨浆为原料生产热升华数码转印纸,采用不同型号的废纸合理配比,配合使用专用的覆盖涂层材料在常规的转印涂层和基纸之间增加一层覆盖涂层,该涂层可以覆盖基纸表面的色点和尘埃点,防止对后续的打印和转印造成影响;可以吸收油墨中的水份,减少水份向基纸的渗透,这可以避免基纸由于吸水润涨而产生较大的变形,该涂层的孔隙率要远小于纤维组织,可以有效的截留油墨向纤维中渗透,而停留在转印涂层中,保证了热转印时的转移率。

Description

一种数码转印纸的生产工艺
技术领域
本发明涉及造纸领域,涉及一种数码转印纸的生产工艺。
背景技术
利用回收废纸是一种经济、环保的制浆造纸手段,既节约了木材资源,又减轻了制浆污水的排放和能源消耗。常规的再生纸桨一般通过碎解、浮选、脱墨后获得,但是由于废纸脱墨漂白后仍然避免不了纸面上有残余的色点和尘埃,这些色点和尘埃在数码打印及热转印的过程中造成障碍,影响了纸品的品质,而当前热升华数码转印纸基本构成一般是基纸+转印面涂层+整饰背涂层(或无该背涂层),其中,基纸的纤维原料一般是纯木浆,即原生纤维;转印面涂层主要是起到储存打印热升华油墨,并保证在高温下油墨能从该涂层内释放的作用;背涂的作用主要是调整纸页的翘曲,改善打印运行性。
如何将上述的再生纸浆用于热升华数码转印纸的生产中去,同时克服上述再生纸浆存在的诸多问题,成为本领域难以解决的问题。
发明内容
本发明针对现有技术存在的诸多问题,提供了一种数码转印纸的生产工艺,该工艺以废纸脱墨浆为原料生产热升华数码转印纸,采用不同型号的废纸合理配比,配合使用专用的覆盖涂层材料在常规的转印涂层和基纸之间增加一层覆盖涂层,该涂层可以覆盖基纸表面的色点和尘埃点,防止对后续的打印和转印造成影响;可以吸收油墨中的水份,减少水份向基纸的渗透,这可以避免基纸由于吸水润涨而产生较大的变形,该涂层的孔隙率要远小于纤维组织,可以有效的截留油墨向纤维中渗透,而停留在转印涂层中,保证了热转印时的转移率。
本发明的技术方案如下:
一种数码转印纸的生产工艺,以废纸脱墨浆为原料生产热升华数码转印纸,并在转印涂层和基纸之间增加一层覆盖涂层,
其中所述的基纸的生产工艺为:
原料组成:重量百分比50%-70%的8#废纸和50%-30%的10#废纸,
按每吨废纸0.5-2kg的比例在转鼓碎浆时加入分散剂,按每吨绝干浆3-5kg 的比例在浮选槽添加皂化钠脱墨剂,充分碎解、浮选、脱墨后,按每吨绝干浆加80-120kg质量百分比为27.5%的双氧水漂白,经过筛选、除砂系统制成脱墨浆,此浆料再在抄纸前按每吨纸5-10kg的比例加入AKD或ASA施胶剂,同时按每吨纸0.2-0.6kg的比例加入干粉PAM助留剂,按0.5-1.0kg/吨纸的比例加入PAM液体助滤剂,按5-15kg/吨纸的比例加入阳离子淀粉;之后经过脱水、压榨、干燥、压光、卷取成形,成纸克重40-70g/m2
其中所述的分散剂选自脂肪醇聚氧乙烯醚类或脂肪醇聚氧丙烯醚类脱墨分散剂;
上述基纸制备方法中除特殊说明外均采用现有技术完成;
所述的覆盖涂层涂料配比按重量份计为:
65级研磨碳酸钙100份,丁苯胶乳5-10份;酯化淀粉3-5份;润滑剂0.1-0.5 份;羧甲基纤维素0.1-0.5份;
其中所述的润滑剂选自脂肪酸脂类、脂肪胺或酰胺类润滑剂中一种或多种;
制备时首先将酯化淀粉用水分散,羧甲基纤维素用水溶解,之后在制备罐中依次按比例加入研磨碳酸钙、丁苯胶乳、酯化淀粉分散液、润滑剂、羧甲基纤维素溶液,补充水至需要的固含量,所需固含量为60-75%;上述制备方法中除特殊说明外均可采用现有技术完成;
上述涂料的涂布量10-20g/m2
其中所述的65级研磨碳酸钙中直径小于2μm的颗粒占到整体的65%;
所述的酯化淀粉选自磷酸酯淀粉或乙酸脂淀粉或硫酸脂淀粉;除特殊说明外其他材料均采用现有技术或市购获得;
所采用的涂布工艺采用一次刮刀涂布,刀角调整为25度,刀压控制在5kg 左右。
采用这种涂料组成和对应的涂布工艺后,所获得的覆盖涂层作用有三个:一是覆盖基纸表面的色点和尘埃点,防止对后续的打印和转印造成影响;二是该涂层可以吸收油墨中的水份,减少水份向基纸的渗透,这可以避免基纸由于吸水润涨而产生较大的变形;三是该涂层的孔隙率要远小于纤维组织,可以有效的截留油墨向纤维中渗透,而停留在转印涂层中,保证了热转印时的转移率。
转印涂料使用常规的羧甲基纤维素和碳酸钙为主要原料,涂布量5-8g/m2;背涂使用常规的糊化淀粉及其它辅料为主要原料,涂布量1-2.5g/m2
该涂布时,正面使用二次刮刀涂布,先涂覆盖层涂料,再涂转印层涂料,背面使用一次刮刀涂布。
综上所述,本发明所提供的这种工艺该工艺以废纸脱墨浆为原料生产热升华数码转印纸,采用不同型号的废纸合理配比,配合使用专用的覆盖涂层材料在常规的转印涂层和基纸之间增加一层覆盖涂层,该涂层可以覆盖基纸表面的色点和尘埃点,防止对后续的打印和转印造成影响;可以吸收油墨中的水份,减少水份向基纸的渗透,这可以避免基纸由于吸水润涨而产生较大的变形,该涂层的孔隙率要远小于纤维组织,可以有效的截留油墨向纤维中渗透,而停留在转印涂层中,保证了热转印时的转移率。
具体实施方式
下面结合实施例来进一步说明本发明,可以使本领域技术人员更全面的理解本发明,但不以任何方式限制本发明。
实施例1
一种数码转印纸的生产工艺,以废纸脱墨浆为原料生产热升华数码转印纸,并在转印涂层和基纸之间增加一层覆盖涂层,
其中所述的基纸的生产工艺为:
原料组成:8#废纸和10#废纸各50wt%;
按每吨废纸0.5kg的比例在转鼓碎浆时加入分散剂,所述分散剂为脂肪醇聚氧乙烯醚类脱墨分散剂,按每吨绝干浆3kg的比例在浮选槽添加皂化钠脱墨剂,充分碎解、浮选、脱墨后,按每吨绝干浆加85kg质量百分比为27.5%的双氧水漂白,经过筛选、除砂系统制成脱墨浆,以此做为基纸的主要纤维原料,此浆料再在抄纸前按每吨纸8kg的比例加入AKD施胶剂,同时按每吨纸0.5kg 的比例加入干粉PAM助留剂,按0.6kg/吨纸的比例加入PAM液体助滤剂,按 8kg/吨纸的比例加入阳离子淀粉;经过脱水、压榨、干燥、压光、卷取成形,成纸克重60g/m2
所述的覆盖涂层涂料配比按重量份计为:
65级研磨碳酸钙100份,丁苯胶乳5份;磷酸酯淀粉3份;脂肪酸脂类润滑剂0.2份;羧甲基纤维素0.3份;
制备时首先将酯化淀粉用水分散,羧甲基纤维素用水溶解,之后在制备罐中依次按比例加入研磨碳酸钙、丁苯胶乳、酯化淀粉分散液、润滑剂、羧甲基纤维素溶液,补充水至固含量69%;所采用的涂布工艺采用一次刮刀涂布,刀角调整为25度,刀压控制在5kg左右,涂布量10g/m2
转印涂料以羧甲基纤维素和碳酸钙为主要原料,涂布量6g/m2;背涂以糊化原淀粉为主要原料,涂布量1.5g/m2。涂布时,正面使用1#、3#涂布头,分别涂覆盖层涂料和涂转印层涂料,2#涂布头涂背涂涂料。
使用效果测试:最终成品热升华数码打印纸的克重是77.5g/m2。经打印测试,油墨干燥速度为3’42”,油墨转移率72.3%,打印后无漏印现象,热转印后无白点现象。与相近克重77g/m2原生浆数码打印纸测试对比情况:油墨干燥速度为4’26”,油墨转移率70.7%,打印后无漏印现象,热转印后无白点现象。可见以废纸浆为纤维原料,增加一层覆盖涂层的环保型热升华数码打印纸完全可以替代100%原生浆数码打印纸。
实施例2:
一种数码转印纸的生产工艺,以废纸脱墨浆为原料生产热升华数码转印纸,并在转印涂层和基纸之间增加一层覆盖涂层,
其中所述的基纸的生产工艺为:
原料组成:8#废纸70wt%和10#废纸30wt%;
按每吨废纸1.6kg的比例在转鼓碎浆时加入脂肪醇聚氧丙烯醚类脱墨分散剂,按每吨绝干浆4.8kg的比例在浮选槽添加皂化钠脱墨剂,充分碎解、浮选、脱墨后,按每吨绝干浆加110kg质量百分比为27.5%的双氧水漂白,经过筛选、除砂系统制成脱墨浆,以此做为基纸的主要纤维原料,此浆料再在抄纸前按每吨纸5.5kg的比例加入AKD施胶剂,同时按每吨纸0.6kg的比例加入干粉PAM 助留剂,按0.5kg/吨纸的比例加入PAM液体助滤剂,按10kg/吨纸的比例加入阳离子淀粉;经过脱水、压榨、干燥、压光、卷取成形,成纸克重70g/m2
所述的覆盖涂层涂料配比按重量份计为:
65级研磨碳酸钙100份,丁苯胶乳8份;磷酸酯淀粉4.5份;脂肪胺类润滑剂0.4份;羧甲基纤维素0.2份;
制备时首先将酯化淀粉用水分散,羧甲基纤维素用水溶解,之后在制备罐中依次按比例加入研磨碳酸钙、丁苯胶乳、酯化淀粉分散液、润滑剂、羧甲基纤维素溶液,补充水至固含量70.5%;所采用的涂布工艺采用一次刮刀涂布,刀角调整为25度,刀压控制在5kg左右,涂布量15g/m2
转印涂料以羧甲基纤维素和碳酸钙为主要原料,涂布量7g/m2;背涂以糊化原淀粉为主要原料,涂布量1.0g/m2。涂布时,正面使用1#、3#涂布头,分别涂覆盖层涂料和涂转印层涂料,2#涂布头涂背涂涂料。
使用效果测试:最终成品热升华数码打印纸的克重是93g/m2。经打印测试,油墨干燥速度为3’01”,油墨转移率75.5%,打印后无漏印现象,热转印后无白点现象。相近克重92g/m2原生浆数码打印纸测试对比情况:油墨干燥速度为3’33”,油墨转移率74.1%,打印后无漏印现象,热转印后无白点现象。可见以废纸浆为纤维原料,增加一层覆盖涂层的环保型热升华数码打印纸完全可以替代100%原生浆数码打印纸。
成本比较:
同样按生产80g/m2的热升华转移印花纸,其中:原生木浆生产原纸时,需要73g/m2的原纸,涂以7g/m2的转印层涂料;废纸脱墨浆生产原纸时,需要 58g/m2原纸,涂以15g/m2的覆盖层涂料和7g/m2的转印层涂料。成本对比如下:
Figure GDA0002302273660000041
分析:通过以上对比,使用废纸脱墨浆生产原纸,再涂以覆盖层涂料和转印层涂料后的最终产品成本比原生木浆生产的产品低约2400元/吨,并且使用本申请 方法每生产一吨转印纸可以节约大约1.2吨木材,有着可观的环保效益。

Claims (3)

1.一种数码转印纸的生产工艺,其特征在于:以废纸脱墨浆为原料生产热升华数码转印纸,并在转印涂层和基纸之间增加一层覆盖涂层,
其中所述的基纸的生产工艺为:
原料组成:重量百分比50%-70%的8#废纸和50%-30%的10#废纸;之后按每吨废纸0.5-2kg的比例在转鼓碎浆时加入分散剂,按每吨绝干浆3-5kg的比例在浮选槽添加皂化钠脱墨剂,充分碎解、浮选、脱墨后,按每吨绝干浆加80-120kg质量百分比为27.5%的双氧水漂白,经过筛选、除砂系统制成脱墨浆,此浆料再在抄纸前按每吨纸5-10kg的比例加入AKD或ASA施胶剂,同时按每吨纸0.2-0.6kg的比例加入干粉PAM助留剂,按0.5-1.0kg/吨纸的比例加入PAM液体助滤剂,按5-15kg/吨纸的比例加入阳离子淀粉;之后经过脱水、压榨、干燥、压光、卷取成形,成纸克重40-70g/m2
所述的覆盖涂层涂料配比按重量份计为:
65级研磨碳酸钙100份,丁苯胶乳5-10份;酯化淀粉3-5份;润滑剂0.1-0.5份;羧甲基纤维素0.1-0.5份;最终制备涂料固含量60-75%;上述覆盖涂层涂料的涂布量10-20g/m2
其中所述的65级研磨碳酸钙中直径小于2μm的颗粒占到整体的65%;
所述的酯化淀粉选自磷酸酯淀粉或乙酸脂淀粉或硫酸脂淀粉;
转印涂层使用常规的羧甲基纤维素和碳酸钙为主要原料,涂布量5-8g/m2;背涂使用常规的糊化淀粉及其它辅料为主要原料,涂布量1-2.5g/m2
2.根据权利要求1所述的工艺,其特征在于:
所述的分散剂选自脂肪醇聚氧乙烯醚类或脂肪醇聚氧丙烯醚类脱墨分散剂。
3.根据权利要求1所述的工艺,其特征在于:
所述的润滑剂选自脂肪酸脂类、脂肪胺或酰胺类润滑剂中一种或多种。
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