發布日期:2021-6-21 9:44:31 訪(fang)問次數:620
紙(zhi)(zhi)(zhi)(zhi)張(zhang)(zhang)(zhang)的(de)(de)(de)含(han)(han)水(shui)量是指(zhi)紙(zhi)(zhi)(zhi)(zhi)張(zhang)(zhang)(zhang)中(zhong)所含(han)(han)水(shui)分(fen)的(de)(de)(de)重量占該紙(zhi)(zhi)(zhi)(zhi)張(zhang)(zhang)(zhang)重量的(de)(de)(de)百分(fen)比。紙(zhi)(zhi)(zhi)(zhi)張(zhang)(zhang)(zhang)含(han)(han)水(shui)量過大時(shi),紙(zhi)(zhi)(zhi)(zhi)中(zhong)纖維、填料與膠料之間(jian)(jian)的(de)(de)(de)結合力(li)就容易(yi)降低(di),由(you)此將降低(di)紙(zhi)(zhi)(zhi)(zhi)張(zhang)(zhang)(zhang)的(de)(de)(de)硬(ying)度(du)和挺度(du),影響(xiang)紙(zhi)(zhi)(zhi)(zhi)張(zhang)(zhang)(zhang)表面強度(du),導致印(yin)(yin)(yin)刷產(chan)(chan)品出現脫墨、分(fen)層等不(bu)良(liang)情況發(fa)生,還(huan)易(yi)增加(jia)紙(zhi)(zhi)(zhi)(zhi)張(zhang)(zhang)(zhang)塑性、產(chan)(chan)生變(bian)形(xing)、造成印(yin)(yin)(yin)品套(tao)印(yin)(yin)(yin)不(bu)準(zhun)、延長印(yin)(yin)(yin)跡(ji)干(gan)燥(zao)時(shi)間(jian)(jian)、印(yin)(yin)(yin)品背面粘臟(zang);如果紙(zhi)(zhi)(zhi)(zhi)張(zhang)(zhang)(zhang)含(han)(han)水(shui)量過低(di)的(de)(de)(de)話,導致紙(zhi)(zhi)(zhi)(zhi)張(zhang)(zhang)(zhang)彈(dan)性差,紙(zhi)(zhi)(zhi)(zhi)發(fa)脆,降低(di)撕裂(lie)度(du),印(yin)(yin)(yin)刷時(shi)易(yi)產(chan)(chan)生靜電。紙(zhi)(zhi)(zhi)(zhi)張(zhang)(zhang)(zhang)含(han)(han)水(shui)量的(de)(de)(de)變(bian)化不(bu)僅導致紙(zhi)(zhi)(zhi)(zhi)張(zhang)(zhang)(zhang)的(de)(de)(de)膨脹或收(shou)縮(suo),而且還(huan)會因(yin)為含(han)(han)水(shui)量變(bian)化使得紙(zhi)(zhi)(zhi)(zhi)張(zhang)(zhang)(zhang)局部(bu)尺寸變(bian)化,從而導致紙(zhi)(zhi)(zhi)(zhi)張(zhang)(zhang)(zhang)變(bian)形(xing),卷曲(qu)、打皺、荷葉邊等。紙(zhi)(zhi)(zhi)(zhi)張(zhang)(zhang)(zhang)變(bian)形(xing)是引起多色印(yin)(yin)(yin)刷套(tao)印(yin)(yin)(yin)不(bu)準(zhun)的(de)(de)(de)重要因(yin)素(su)。
下一信息:臺歷掛歷定做-襄陽臺歷掛歷印刷的注意事項
微信(xin)號:18995659315