Selection of raw materials for sticker printing
The choice of raw materials should be considered from the following two aspects. 1. Printing and processing characteristics of self-adhesive materials ①Consistency of surface gloss and color of surface material, uniformity of density Achieving some indicators determines the uniformity of ink absorption of the self-adhesive materials, and also determines the color difference of the same batch of label prints. The coating strength of the face material determines whether a large amount of paper dust will be generated during printing, and it is also an important indicator to determine the printing quality. ②The uniformity and strength indication of the thickness of the backing paper and face material These indexes are not only related to printing performance, but also important indexes that determine the uniformity of die cutting and the speed and edge breakage when discharging. If these indicators are too low, the label machine cannot be produced at high speed. ③The flatness of the material or the uniformity of the rewinding tension Whether it is single-sheet printing or web printing, the flatness of the material determines whether the paper can be correctly fed, run, registered, and received during printing. For the roll material, the rewinding tension will play an important role in the flatness of the end surface of the roll material, whether there is glue leakage, and whether it can be correctly registered. ④ Uniformity and correct coating amount of adhesive and silicone oil coating These indicators directly affect the peeling force (release force) between the label and the backing paper, and the size of the peeling force directly affects the die-cutting waste discharge and the speed of the machine. The peeling force also determines the label's output status, that is, application . In addition, the amount of glue applied will also affect the material's end-face penetration. Therefore, when purchasing adhesive materials, we must carefully check and choose the materials with the appropriate amount of glue and silicon. 2. Application characteristics of self-adhesive materials ①Type of adhesive When choosing a self-adhesive material, first determine whether the adhesive required for the self-adhesive label you make is permanent or removable, whether it is applied once or re-attached, and the product is a dry label Are there any special requirements for the chemical properties of the adhesive? ②The surface condition of the labeled object What kind of material is the surface of the labeling object, whether it is wood, glass or plastic, and whether the surface is smooth or rough, such indicators determine what kind of adhesive should be selected. ③The shape and intensity of the labeled object Whether the labeling object is flat or curved, large or small diameter, single curved or spherical; whether the object is rigid or compressible. These indicators are directly related to the choice of face material and adhesive. ④The use environment of the sticker Whether the use environment of the labeled items is outdoor or indoor, high temperature environment or low temperature environment, whether the use environment is corrosive, dry or humid. According to these indicators, you can choose the matching face material and adhesive. ⑤ How to use stickers Whether it is manual labeling or automatic labeling. The labeling method of the label can determine the type of label material, the type of ink, and the printing method.
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