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手提袋覆膜不亮的原因有哪些?

  平时生活中能见到各种手提袋,这都是通过印刷制作的,有时会遇到印刷的手提袋不亮,这是什么原因呢?总结几点:

  Usually we can see all kinds of handbags in our daily life. They are all made by printing. Sometimes they are not bright. What's the reason? Jining Printing Factory summarizes several points:

  1、压力不足

  1. Insufficient pressure

  根据客户的需求,承印物材料的厚度多是不一致。在覆膜时应根据承印物纸张的厚度来调整硅胶滚筒和钢滚筒之间的压力。如果压力过小,覆膜产品的膜不牢、不亮、易产生皱纹:压力太大,会产生膜皱和纸张变形。

  According to the needs of customers, the thickness of printing materials is different. The pressure between the silica gel drum and the steel drum should be adjusted according to the thickness of the printing paper. If the pressure is too low, the film is not firm, bright and easy to wrinkle. If the pressure is too high, the film wrinkle and paper deformation will occur.

  2、温度控制不合适

  2. inappropriate temperature control

  对不同承印物进行覆膜时,电加热钢滚筒的温度应根据所覆产品来调节。如覆膜承印物是金卡纸,覆压钢滚筒温度应控制在70-80℃:如是覆250g/m2或300g/m2的灰白板纸,温度就应调到80-90℃。白板纸在放置过程中,其吸收的水分远超过金卡纸。

  When coating different impressions, the temperature of electric heating steel drum should be adjusted according to the product covered. If the covering material is gold cardboard, the temperature of the steel drum should be controlled at 70-80 C. If the covering material is 250g/m2 or 300g/m2, the temperature should be adjusted to 80-90 C. White board absorbs much more water than gold cardboard during placement.

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  3、出胶量

  3. Output of glue

  在使用拉伸聚丙烯薄膜覆膜时,应在膜上涂胶。涂胶量是通过装在胶盒里的一根传动钢辊经转动带胶涂在走动的膜上,胶量的控制是靠一落在钢辊上的钢制刀片来控制的。济宁印务厂提示大家,压力轻胶量大:压力重胶量小。胶量的多少要掌握好,既能覆牢均匀,又不能产生晶点。

  When using stretching polypropylene film, the film should be coated with glue. The amount of glue is coated on the moving film by a transmission steel roll in a rubber box through a rotating belt. The control of glue amount is controlled by a steel blade falling on the steel roll. Jining Printing Factory reminds you that the pressure of light glue is large: the pressure of heavy glue is small. The amount of glue should be well controlled, which can not only cover uniformly, but also produce crystal points.

  4、保持滚筒清洁

  4. Keep the drum clean

  经长时间覆压,钢滚筒与膜直接接触,加上温度作用,钢滚筒上会留一些残物在上面。硅胶滚筒直接和所覆产品纸张的背面接触,再加上走纸间距的分离,很多胶就直接烫压到胶滚筒上而产生堆积,这都会影响所覆产品的亮度。

  After a long time of overlaying, the steel drum contacts directly with the membrane, plus the effect of temperature, some debris will be left on the steel drum. The silica gel drum contacts directly with the back of the overlaid product paper, and the separation of the distance between the paper traveling, many glues are directly pressed onto the rubber drum and accumulate, which will affect the brightness of the overlaid product.


 
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