<***N style="mso-fareast-font-family: 宋体" lang=EN-US><***N style="mso-spacerun: yes"> ***N>***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">喷射印刷用墨水应具有良好的稳定性,在长时问连续运行喷射印刷时,不堵塞喷嘴。此外,也要求在停止喷射印刷时,没有因残留在喷嘴中的墨水干燥硬化而堵塞喷嘴的现象发生,不妨碍重复喷射,不影响喷射方向,能保持流畅的再喷射状态。***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>
<***N style="mso-fareast-font-family: 宋体" lang=EN-US><***N style="mso-spacerun: yes"> ***N>***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在钢笔和描写式记录器上使用的墨水,也有类似的要求。过去采用了乙二醇、二乙二醇、聚乙二醇、甘油等多元醇系列湿润剂应用于喷射印刷用墨水,在一定程度上能控制在停止喷射时墨水在喷嘴中的干燥固化。但长时间运行或长时间停止***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>(***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一周左右***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>)***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,在喷嘴出口处仍有染料堆积物,改变了喷射方向,甚至完全堵塞喷嘴,以致于得不到满意的结果。***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>
<***N style="mso-fareast-font-family: 宋体" lang=EN-US><***N style="mso-spacerun: yes"> ***N>***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">采用***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>PVP***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">低分子量聚合物后***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>(***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">平均分子量在***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>400***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">左右***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>)***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,由于其不发挥性,又有良好的湿润性和水溶性以及对染料、颜料的亲和性,可以使油墨、墨水具有良好的分散稳定性,在喷印、书写及记录时,具有流畅的重复喷射书写性能,停一周后仍然能正常喷印。***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>
<***N style="mso-fareast-font-family: 宋体" lang=EN-US><***N style="mso-spacerun: yes"> ***N>***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">碳素墨水由于在贮存过程中极易发生炭黑的絮凝、沉淀,严重影响书写质量,经常堵塞书写工具,成为墨水行业几十年未解决的难题之一。上海墨水厂采用浙江省化工院提供的低分子量***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>PVP***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">及***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>PCM***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">进行了配方试验、工艺试验以及墨水的各项性能测试,证明低分子量***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>PVP***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">与墨水中其它组分互溶性好,对炭黑具有一定的分散能力及胶体保护能力,在加入***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>PVP***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">后的墨水书写流利,手感润滑,尤其是墨水的间歇书写能力有较大的改善。该厂利用以上技术,研制成功了新一代“英雄”牌**墨水,缩短了与国外**碳素墨水的差距。***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>
<***N style="mso-fareast-font-family: 宋体" lang=EN-US><***N style="mso-spacerun: yes"> ***N>***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">另外,在圆珠笔用墨水及广告画颜料组成物中,***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>PVP K17***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">或***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>K30***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">也可作为保护胶体和增稠剂。用***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>PVP***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">制得的圆珠笔用水性墨水既保持了炭黑墨水笔迹坚牢,无溢流、不褪色的优点,又减轻了珠座的磨损,延长了使用寿命。***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>
<***N style="mso-fareast-font-family: 宋体" lang=EN-US><***N style="mso-spacerun: yes"> ***N>***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">从全球范围看,***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>PVP***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在喷印墨水、涂料、照相乳液等行业作为分散稳定剂、流变调节剂等的需求量约占***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>1500***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">吨左右,占***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>PVP***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">总需求量的***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>3.3%***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。总用量不算大,但在某些产品中则一直是不可或缺的,历经几十年而不变。***N><***N style="mso-fareast-font-family: 宋体" lang=EN-US>