Case Study: Failure Treatment of Post-pressing Process of Beer Packaging Box
We are a big printing company in Shenzhen China . We offer all book publications, hardcover book printing, papercover book printing, hardcover notebook, sprial book printing, saddle stiching book printing, booklet printing,packaging box, calendars, all kinds of PVC, product brochures, notes, Children's book, stickers, all kinds of special paper color printing products, game cardand so on.
For more information please visit
http://www.joyful-printing.com. ENG only
http://www.joyful-printing.net
http://www.joyful-printing.org
email: info@joyful-printing.net
The surface paperboard with a batch of beer crates has the defects of wrinkles and streaks on the surface after calendering. According to the quality requirements, the appearance of the paper should be clean, smooth, scratch-free and wrinkle-free after calendering.
When calendering process parameters (such as calendering temperature, pressure, speed, etc.) are unchanged, we use another batch of packaging box cardboard to calender, and as a result, the surface of the cardboard is calendered without wrinkles and streaks. . Through comparative analysis, it is believed that the reason is due to the difference in the quality of the two types of cardboard. The surface of the paperboard which will produce wrinkles and streaks after calendering is relatively poor in paper quality. However, the batch of cardboard has been finished, if it is scrapped after the calendering will produce some wrinkles and streaks that do not meet the quality requirements, it will result in inability to deliver on time and a large loss of waste. And if it can be treated by appropriate remedial measures, the calendering quality can be met, one can be delivered on time, and the other can reduce losses.
To this end, we have selected one of the effective measures to solve the problem through the processing and experimentation of several different methods. The method comprises the following steps: tempering the unpolished cardboard after glazing, and then hot-drying on the calender first, the temperature of the hot baking is the same as the temperature of the calendering, and the hot baking is not performed on the calender. Add pressure, in the case of the belt conveyor of the calender, put the cardboard on the surface of the steel strip at the end of the discharge port, and bring the paper into the drying tunnel and return to the calender through the steel belt. The mouth of the mouth. After such hot baking and calendering according to the normal calendering process (i.e., adding one glaze and one hot bake), the wrinkles and streaks on the batch of cardboard disappeared.
Incidentally, in general, the calendering temperature is generally controlled at 115 ° C to 120 ° C, the pressure is controlled at 150 to 180 kg / m 2 , and the speed is 6 - 10 m / min. Of course, in the field operation, it should be reasonably adjusted and mastered according to the thickness of the cardboard. It is worth noting that for paper products to be calendered, there must be a choice in paper quality, otherwise the calendering quality requirements will not be met.