電暈處理是廣泛用于對(duì)塑料、紙張及金屬箔作表面處理以改進(jìn)油墨、油漆、連接劑及涂料的附著力。它被廣泛采用的原因是效果好、能控制及便于掌握。尤其是因?yàn)殡姇炋幚碓O(shè)備的效率及作用不斷改進(jìn)，與高產(chǎn)的加工設(shè)備保持著同步并進(jìn)。<span lang="EN-US"><o:p>
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              <p class="MsoNormal" style="TEXT-INDENT: 21pt; LINE-HEIGHT: 150%; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><span lang="EN-US"> </span><span style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一、可濕性與附著力</span><span lang="EN-US"><o:p>
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              <p class="MsoNormal" style="TEXT-INDENT: 21pt; LINE-HEIGHT: 150%; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><span style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">電暈處理是改變不少非吸收性基材表面特性的一種有效手段，能使油墨有更好的濕潤(rùn)及附著性能，即所謂可濕性，這就是諸如油墨、底膠、涂料等對(duì)塑料、紙張或金屬箔附著的基礎(chǔ)?？蓾裥詻Q定一種液體在一種固體表面上的展延性。水滴在親水性表面就展延成一薄水層，而在親油性表面卻形成小水滴。水滴外表層的切線與固體表面間所形成的接觸角（夾角），即表示該表面潤(rùn)濕性能的強(qiáng)弱，接觸角越大，潤(rùn)濕性能越差。</span><span lang="EN-US"><o:p>
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              <p class="MsoNormal" style="TEXT-INDENT: 21pt; LINE-HEIGHT: 150%; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><span style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">潤(rùn)濕性視化學(xué)組成及表面結(jié)構(gòu)而異。對(duì)塑料進(jìn)行印刷或燙箔時(shí)，塑料表面的可濕性必須比油墨或箔的可濕性高，否則其展延、轉(zhuǎn)移及附著均會(huì)發(fā)生困難。幾種聚合物的表面性能大致如下：</span><span lang="EN-US"><o:p>
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              <p class="MsoNormal" style="TEXT-INDENT: 21pt; LINE-HEIGHT: 150%; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><span lang="EN-US"> </span><span style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">聚乙烯（</span><span lang="EN-US">PE</span><span style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）</span><span lang="EN-US"><