CN1270379A - 瓶罐用纸塑复合标贴及其制造方法 - Google Patents
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Abstract
一种瓶罐用纸塑复合标贴及其制造方法,它由四层材料组成。第一层为双轴拉伸聚丙烯薄膜,第二层是氯化聚丙烯类油墨,第三层是双组份聚氨酯类粘胶剂,第四层是铝箔衬纸。制造时先对薄膜进行电晕处理,然后内印;选用凹辊涂抹醋酸乙酯溶剂后用干法复合机与铝箔衬纸复合成型。本标贴不怕潮湿,强度好;不会被刮伤或破损,而且色泽鲜艳。
Description
本发明涉及一种瓶罐用纸塑复合标贴及其制造方法，属于标贴的技术领域。
随着经济的发展，居民生活显著提高，市场也日益繁荣，货架上瓶罐类商品品种繁多。现有的瓶罐其外观包装的设计以及印刷，一般都是印铁后制成罐或由纸张平板印刷以后再贴合于瓶罐表面，但纸张的平板印刷的标贴纸还存在很多缺点。其缺点为：
1.平板印刷本身的墨层较薄而不够厚实，色彩也不够鲜艳，立体感很差。
2.用铜版纸印刷以后贴合于瓶罐表面，由于纸质易于吸湿，使标贴纸易于脱落甚至腐烂变质。
3.纸质极薄，在包装或运输过程中则容易被刮伤而破损，影响包装的外观质量，对销售产生不良作用。
本发明的目的是要提供一种瓶罐用纸塑复合标贴，它可以克服上述的缺点。采用凹板印刷塑料薄膜(Bopp)与一层铝箔衬纸复合，使墨层厚实，色泽鲜艳，不易刮伤破损；薄膜又不吸水，所以不会受潮而皱缩变形。
本发明的另一目的是要提供一种瓶罐用纸塑复合标贴的制造方法。该方法可以把聚丙烯薄膜通过内印而与油墨层、粘胶剂层以及铝箔衬纸复合成标贴。
本发明的目的是这样实现的：
1.标贴由四层复合组成。第一层即表面层为双轴拉伸的聚丙烯薄膜1，第二层是氯化聚丙烯油墨的油墨层2，第三层是双组份聚氨酯类的粘胶剂层3，第四层是铝箔衬纸4。
2.第一层即表面层聚丙烯薄膜进行了电晕处理，然后用高速凹板印刷机进行内印；第二层采用与粘胶剂亲和性较好的氯化聚丙烯类油墨，再用凹辊涂抹醋酸乙酯溶剂后与用高速干法复合机复合成纸塑复合标贴。
图1.瓶罐用纸塑复合标贴的示意图
兹结合附图及实例对瓶罐用纸塑复合标贴的结构及其工艺制造方法详细叙述：
由图1，复合纸塑标贴的第一层即表面层1为双轴拉伸的聚丙烯薄膜(Bopp薄膜)1，第二层是氯化聚丙烯油墨的油墨层2，第三层是双组份聚氨酯类的粘胶剂层3，第四层是铝箔衬纸4。
复合纸塑标贴的制造方法如下：
1.印刷：第一层即表面层1采用Bopp薄膜即双轴拉伸的聚丙烯薄膜。使其表面具有活性基因，使薄膜的表面粗糙度增加，有利于印刷以及粘胶剂(胶水)均匀涂布。Bopp薄膜厚度一般为18-28UM，其拉伸强度纵向≥120mpa，横向≥200mpa，断裂伸长率纵向≤180％，横向≤70％，热收缩率≤4％，透平率≥95％，雾度≤1.5％，光泽度≥88％，润湿张力38n/m，摩擦系数≤0.5％。
1.印刷采用Bopp薄膜内面里印，使油墨不易受损掉色。Bopp薄膜具有透明度高、光亮度良好、柔韧无毒、价格低廉且耐磨、耐水、耐热及耐化学腐蚀等特点；但是它是非极性物质，表面能通常很低，临界表面张力是3.4×102n/m，对油墨或粘胶剂的亲和力极差，所以才采用电晕预处理。第二层油墨层是氯化聚丙烯油墨，它与胶水的亲和力较好。
2.复合：标贴的纸要求选用40～55g/m2，由于四季的空气湿度相差很大，所以纸张的含水量四季有高低之分，但生产环境的空间湿度要控制在60～85％，否则产品会发生卷曲或起泡以致报废；另外，纸张要有一定的洁白度，复合面的平滑度也要求较好，表面平整而绝不能有“荷叶边”，否则复合后的成品会起皱。复合所用的胶水一般为聚氨酯型粘胶剂，它具有良好的初黏性。
涂胶量的多少对于复合后的粘接牢固度有很大关系。对于标贴的复合来说，一般取为1.8-2.8g/m3(干基)，接着应考虑胶液配制的浓度，浓度按W＝(1/4-1/6)UND计算。式中1/4-1/6是一经验系数，它由橡胶辊弹性及压力网点形状的影响而变化，可选取平均值为1/5；W是干基上胶量，U是涂胶网辊的网点浓度(UM)，N是配制胶液浓度的％，D是胶液密度g/m3；由于凹辊的网点浓度已是固定，网点形状也不能改变，所以上胶量的数值就由胶液浓度来确定，N值越大上胶量W也越多，反之亦然。
溶剂采用醋酸乙酯，使标贴的外观平整，纸也不会与印刷膜完整剥离，使标贴达到了使用要求。
印刷设备可以采用富士6色高速凹板印刷机，复合设备可采用富士高速干法复合机。
与现有技术相比，瓶罐用纸塑复合标贴具有下列优点：
1.用凹板印刷内印于薄膜内表面，复合后标贴的图案、文字色彩鲜艳并不易被刮伤和脱落，不怕潮湿及不会发皱起泡，使标贴起到良好的作用。
2.Bopp薄膜经过电晕预处理，使表面能具有活性基因结果使薄膜粗糙度增加，使粘胶剂涂布均匀牢固。
Claims (2)
1.一种瓶罐用纸塑复合标贴，其特征在于：标贴由四层复合组成。第一层即表面层为双轴拉伸的聚丙烯薄膜1，第二层是氯化聚丙烯油墨的油墨层2，第三层是双组份聚氨酯类的粘胶剂层3，第四层是铝箔衬纸4。
2.一种瓶罐用纸塑复合标贴的制造方法，其特征在于：第一层即表面层聚丙烯薄膜进行了电晕处理，然后用高速凹板印刷机进行内印；第二层采用与粘胶剂亲和性较好的氯化聚丙烯类油墨，再用凹辊涂抹醋酸乙酯溶剂后与用高速干法复合机复合成纸塑复合标贴。
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358068A (zh) * | 2011-06-14 | 2012-02-22 | 刘继福 | 聚合物锂离子电池阻透层软包装膜 |
| CN102514239A (zh) * | 2011-12-22 | 2012-06-27 | 广东壮丽彩印股份有限公司 | 一种烟标粘位的加工工艺 |
| CN103434238A (zh) * | 2013-09-06 | 2013-12-11 | 金石包装（嘉兴）有限公司 | 一种复膜纸塑聚苯乙烯连杯用环标签卷材 |
| CN104476899A (zh) * | 2014-11-29 | 2015-04-01 | 桐城市福润包装材料有限公司 | 一种不干胶薄膜标签的印刷工艺 |
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1999
- 1999-04-12 CN CN 99105552 patent/CN1127042C/zh not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358068A (zh) * | 2011-06-14 | 2012-02-22 | 刘继福 | 聚合物锂离子电池阻透层软包装膜 |
| CN102358068B (zh) * | 2011-06-14 | 2015-11-25 | 刘继福 | 聚合物锂离子电池阻透层软包装膜 |
| CN102514239A (zh) * | 2011-12-22 | 2012-06-27 | 广东壮丽彩印股份有限公司 | 一种烟标粘位的加工工艺 |
| CN102514239B (zh) * | 2011-12-22 | 2014-03-26 | 广东壮丽彩印股份有限公司 | 一种烟标粘位的加工工艺 |
| CN103434238A (zh) * | 2013-09-06 | 2013-12-11 | 金石包装（嘉兴）有限公司 | 一种复膜纸塑聚苯乙烯连杯用环标签卷材 |
| CN103434238B (zh) * | 2013-09-06 | 2015-05-20 | 金石包装（嘉兴）有限公司 | 一种复膜纸塑聚苯乙烯连杯用环标签卷材 |
| CN104476899A (zh) * | 2014-11-29 | 2015-04-01 | 桐城市福润包装材料有限公司 | 一种不干胶薄膜标签的印刷工艺 |
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