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包装印刷注意的常见质量问题!

  世上之事物,纷纭复杂,现象往往掩盖着本质,让人终日忙乱于异常之间,而不能从本质上改变。对于很多生产企业来说,包装质量问题频发,已成为限制企业产品在市场上广泛流通的制约。今天,济南印刷包装分别从印刷、复合、分切三个环节进行实图讲解软包装凹版印刷的常见问题,为企业在进行包装设以及遇到包装质量问题时提供更有价值的参考。

  Things in the world are diverse and complex, and the phenomenon often hides the essence, making people busy in the abnormal all day long, but can not change in essence. For many manufacturing enterprises, the frequent occurrence of packaging quality problems has become a restriction to the widespread circulation of enterprise products in the market. Today, Jinan printing and packaging respectively from the printing, composite, cutting three links to explain the common problems of soft packaging intaglio printing, providing the most valuable reference for enterprises in packaging design and packaging quality problems.

  一、印刷常见问题

  1、 Printing FAQ

  1.套偏

  1. Casing deviation

  多色套印过程中,颜色间没有完全重叠,有一定偏差,如果偏差超过标准(一般主画面≤0.2mm,次要画面≤0.35mm),就成为不合格品。

  In the process of multicolor overprinting, there is no complete overlap between colors, and there is a certain deviation. If the deviation exceeds the standard (generally the main picture ≤ 0.2mm, the secondary picture ≤ 0.35mm), it becomes unqualified.

  2.刀丝(刀线)

  2. Cutter wire (cutter line)

  也称刮墨刀痕,指出现在印品表面的线状油墨痕迹或线状空白。线条的形态各异,有些有油墨,有些无油墨,有些连续,有些是断续的。

  Also known as scraping knife mark, refers to the line ink mark or line blank on the surface of the printed matter. There are different shapes of lines, some with ink, some without ink, some continuous, some intermittent.

  常见原因:刮墨刀刃口损坏、油墨中有杂质、印版抛光不好等。

  Common causes: the blade of the scraper is damaged, there are impurities in the ink, and the plate is not polished well.

 QQ截图20170929174845.jpg

  3.漏印

  3. Missing print

  印刷图案或文字部分的缺失现象。

  The absence of printed patterns or text.

  常见原因:油墨干结造成的堵版;压辊橡胶老化,太硬,弹性不足;压辊上有暗坑等。

  Common causes: block caused by dry ink; aging of pressure roller rubber, too hard, insufficient elasticity; dark pit on pressure roller, etc.

  4.刮不净(糊版)

  4. Scraping (paste)

  由于印版的非图文部分的油墨未刮干净,印刷时转移到薄膜上出现成片的污染。黑墨较易出现此现象。

  Because the ink of the non graphic part of the plate is not scraped clean, there is a piece of pollution when it is transferred to the film during printing. Black ink is easy to appear this phenomenon.

  常见原因:刮刀压力不足;刮刀磨损;印版表面损伤;油墨黏度太大,难以刮干净。

  Common causes: insufficient scraper pressure; scraper wear; plate surface damage; ink viscosity is too large to clean.

  5.溅墨

  5. Ink splashing

  印刷时墨点飞溅到料带上,污染印品表面,多出现在料带边缘。

  When printing, ink splashes onto the strip, contaminating the surface of the printed matter, and most of them appear on the edge of the strip.

  通常油墨粘度低、速度偏高、印版两端防护不当时容易出现此类缺陷。

  Usually the ink viscosity is low, the speed is high, and the protection of both ends of the plate is not at that time prone to such defects.

  6.色差

  6. Color difference

  同样产品通道与通道、卷与卷、批次与批次之间的颜色差异。差异超过标准样上下限或国标标准即为不合格。

  The same color difference between product channel and channel, volume and volume, batch and batch. If the difference exceeds the upper and lower limits of the standard sample or the national standard, it is unqualified.

  7.咬色(反套印)

  7. Color biting (reverse overprint)

  是前一色油墨在套印时反粘到后一色的印版上,在后一色上可以明显看到前一色的颜色。

  Is the first color ink in overprinter to the latter color plate, in the latter color can be clearly seen the color of the previous color.

  原因:前一色油墨干燥不充分;后一色印刷压辊压力过大。

  Reason: the former color ink is not dry enough; the latter color printing roller pressure is too large.

  二、复合常见问题

  2、 Composite FAQ

  1.气泡

  1. Bubble

  指固化后,复合膜内部出现的气泡现象。

  It refers to the bubble phenomenon inside the composite film after curing.

  常见原因:基材表面张力(电晕)不足;复合辊压力不足引起薄膜间的空气未完全排除,或复合辊表面温度低,胶黏剂活化不足;两种基材的阻隔性(PET//VMPET、PET/AL)都较好,导致胶黏剂固化后反应的气体不能排出。

  Common causes: insufficient surface tension (Corona) of the base material; insufficient pressure of the composite roller causes incomplete air removal between the films, or low surface temperature of the composite roller causes insufficient activation of the adhesive; the barrier properties of the two base materials (PET / / VMPET, PET / Al) are good, resulting in the reaction gas can not be discharged after the adhesive solidifies.

  2.隧道

  2. Tunnel

  指复合膜在下机或者熟化后出现的条状中空分层现象。

  It refers to the phenomenon of strip-shaped hollow stratification of composite membrane after dismounting or curing.

  常见原因:两种基材张力不匹配,当粘合剂的初粘强度低于膜变形回弹应力时,变形大的基材回缩;下机后未及时熟化。

  Common reasons: the tension of the two kinds of base materials is not matched. When the initial adhesive strength of the adhesive is lower than the membrane deformation resilience stress, the base materials with large deformation will shrink back; they will not be matured in time after being off the machine.

  3.褶皱

  3. Fold

  指薄膜表面不平整,折叠在一起。多出现在膜卷芯部和表面。

  Refers to the film surface is uneven and folded together. Most of them appear on the core and surface of the roll.

  常见原因:芯管不平整;接头不平整;复合时基材位置偏斜;收卷张力过小导致偏移。

  Common causes: the core pipe is not flat; the joint is not flat; the position of the base material is skewed when compounding; the winding tension is too small, resulting in deviation.

  4.分层

  4. Stratification

  由于复合膜层间剥离强度不合格出现的层间分离现象,多在使用过程中出现(如蒸煮袋在蒸煮后)。

  Because the peeling strength of composite film is not qualified, the phenomenon of interlayer separation often occurs in the use process (for example, the cooking bag after cooking).

  干复或无溶剂复合常见原因:上胶量不足;基材电晕不足;胶黏剂固化不充分;胶黏剂型号使用不当等

  Common causes of dry or solvent-free compounding: insufficient glue application; insufficient corona of base material; insufficient curing of adhesive; improper use of adhesive model, etc

  以上是关于印刷包装时常见质量问题概括,想要了解更多欢迎关注我们网站.

  The above is a summary of common quality problems in printing and packaging. If you want to know more, please pay attention to our website


 
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