The surface board of a batch of beer packaging box has wrinkle and streak quality defects after being calendered. According to the quality requirements, the appearance of the paper product after calendering should be clean, smooth, no scratches, and no wrinkles.
We calendered the calendering process parameters (such as calendering temperature, pressure, speed, etc.) with another batch of cardboard boxes, resulting in no wrinkles and streaks after calendering. . Through comparative analysis, it is believed that the reason is due to the difference in the quality of the two kinds of cardboard. The paperboards with wrinkles and stripes after calendering are relatively poor in paper quality. However, the lot of paperboard has been finished. If it is scrapped because of the wrinkles and streaks after calendering, it will not be able to meet the quality requirements. Therefore, it will cause untimely delivery and a large amount of waste. And if it can be processed through appropriate remedial measures, so that the quality of calendering requirements, one can be delivered on time, and the other can reduce losses.
To this end, we have chosen one of the effective measures to solve the problem through the handling and testing of several different methods. The method is: glazing the non-calendered surface board after glazing, and then heat drying once on the calender. The temperature of the hot bake is the same as the temperature of the calender, and can be not heated when the calender is baked. Under pressure, in the case of the calender belt drive, this side of the board is placed on the strip surface at the discharge end, and the strip is brought into the drying tunnel by the steel strip and returned to the calender. This is the head of the material. After such heat baking and then calendering (ie, adding a coating and a hot bake) in accordance with the normal calendering process, the wrinkles and stripes on the surface of the batch of cardboards have disappeared.
Incidentally, under normal circumstances, the calendered temperature is generally controlled at 115 °C ~ 120 °C, the pressure is controlled at 150 ~ 180kg/m2, speed 6 ~ 10m/min is appropriate. Of course, in the on-site operation, it is also necessary to adjust and grasp the thickness of the paperboard properly. It is worth noting that, for the paper products to be calendered, there must be some choice in paper quality, otherwise the calender quality requirements cannot be achieved.
Eyebrow pencil is a cosmetic product for thrushes. Modern brow pencils come in two forms, a pencil type and a push-tube type, where the lead is pushed out to the eyebrow when used. Brow shade has always been an important parameter of fashion. Its advantages are convenient and quick, suitable for outlining the shape of the eyebrow, sketch short feathered eyebrows, outline the eyebrow tail. The deficiency is that the lines of the painting are blunt; Can't blend colors because it contains wax and is relatively easy to remove in warm and humid environments.
The pencil comes in black or brown, with plastic or wood holders and a metal or plastic case.
Although eyebrow pencils and pencils are similar in appearance, they are made of different materials. The raw material of pencil is graphite, and the main raw material of eyebrow pencil is oil (castor oil, lanolin, etc.), wax (whale wax, white wax, earth wax, etc.) and pigment, essence, etc. These raw materials are mixed, heated, decorated, cooled, rolled into groups, then modified and processed, and finally packaged.
In the selection of eyebrow pencil, the length of the pen must meet the requirements, the appearance of the decoration should be beautiful, the pen lead should be close to the pen, there should be no loose phenomenon. The hardness of the pen tip should be moderate.
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