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不干胶标签模切应该注意哪些知识?

来源:http://www.shengfengyinshua.com/ 日期:2021-01-12 发布人:shengfeng 不干胶印刷材料的模切质量同多种因素有关,如模切方式、模切装置精度、模切版的精度、模切刀片同材料的匹配情况,此外,模切质量还与不干胶印刷材料的特性有关,如面纸、黏合剂和底纸性能不同,各种不干胶印刷材料的模切特性也不一样。
The die-cutting quality of the self-adhesive printing materials is related to many factors, such as the die-cutting mode, the precision of the die-cutting device, the precision of the die-cutting plate, and the matching of the die-cutting blade with the material. In addition, the die-cutting quality is also related to the characteristics of the self-adhesive printing materials, such as different properties of the face paper, adhesive and backing paper, and the die-cutting characteristics of various self-adhesive printing materials are also different.
面材对模切的影响
Influence of surface material on die cutting
影响模切质量的因素有面材的种类、强度和厚度。
The factors that affect the quality of die cutting are the type, strength and thickness of the surface material.
1.面材的种类
1. Types of surface materials
面材基本上可分为纸张和薄膜两大类.普通纸张类的切断原理同薄膜材料略有不同。虽然从理论上讲,模切时必须将面材和黏合剂一同切穿,但实际上模切纸张类材料是刀具切削和纸张受力断裂的综合结果,即刀刃向下切削的同时也将纸张向两侧挤压,所以,相对而言,纸张类材料的模切精度不是很高。在分析样品时经常会看到一些标签有毛边,这就是由于材料纤维较粗,自然断裂形成的现象。基于纸张类材料的模切特性,并考虑到刀刃的磨损,平压平模切刀片的角度通常规定为52°,如果角度大,对材料的挤压变形就大,即水平方向的分离力就会使材料断裂分离现象加剧。
The surface material can be divided into paper and film. The cutting principle of ordinary paper is slightly different from that of film. Although theoretically speaking, the surface material and adhesive must be cut through together during die-cutting, in fact, die-cutting paper sheet material is the comprehensive result of cutting tool and paper stress fracture, that is, when the cutting edge cuts downward, the paper will also be squeezed to both sides. Therefore, relatively speaking, the die-cutting accuracy of paper material is not very high. In the analysis of samples, it is often seen that some labels have rough edges, which is due to the phenomenon that the material fiber is thicker and naturally breaks. Based on the die-cutting characteristics of paper materials, and considering the wear of the blade, the angle of the flat die-cutting blade is usually set at 52 degrees. If the angle is large, the extrusion deformation of the material will be large, that is, the horizontal separation force will aggravate the fracture and separation of the material.
山东透明不干胶标签印刷
薄膜类材料的模切,简单地说就是完全切穿的过程。因为薄膜类材料大多具有韧性,不会自然断裂,所以切穿三分之二是不适合的,必须完全切穿或者切穿五分之四的厚度,否则排废时会连同标签一同剥离。因此,模切薄膜材料的刀刃要锋利,硬度要高,要采用小角度模切刀,刀刃角度通常为30°~42°。如果使用大角度的模切刀,不仅模切困难,而且如果刀刃不锋利还会出现面材切不穿,底纸断裂的情况,或者使成品标签的边缘出现翻边现象,造成渗胶。总之,模切薄膜的精度要高于纸张类材料,所以模切薄膜材料对设备精度、模切版的精度和底纸都有一定的要求。
Film materials die cutting, simply speaking, is a complete cut through process. Because most of the film materials have toughness and will not naturally fracture, it is not suitable to cut through two-thirds of the thickness. It must be completely cut through or cut through four fifths of the thickness, otherwise it will be stripped together with the label when it is discharged. Therefore, die-cutting film material blade to be sharp, high hardness, to use a small angle die-cutting tool, blade angle is usually 30 ° to 42 °. If the use of a large angle die-cutting knife, not only die-cutting difficulties, but also if the blade is not sharp, there will be surface material cut through, the bottom paper fracture, or make the edge of the finished label flanging phenomenon, resulting in leakage. In short, the precision of die-cutting film is higher than that of paper materials, so die-cutting film materials have certain requirements for equipment precision, die-cutting plate precision and bottom paper.
2.面材的强度
2. Strength of surface material
面材的强度同面材的厚度、纤维(高分子)结构和自身的湿度有关。在不干胶印刷材料的模切过程中,与面材关联大的因素是排废速度。环境湿度越大,材料受潮后自身的强度就越弱,从而容易拉断,甚至无法排废。
The strength of the surface material is related to the thickness of the surface material, fiber (polymer) structure and its own humidity. In the die-cutting process of self-adhesive printing materials, the major factor associated with the surface material is the waste discharge speed. The higher the humidity is, the weaker the strength of the material will be, so it is easy to break and even unable to discharge.
设计版式时,要根据材料的强度,通过试验合理安排标签的排废尺寸和排废速度,这样不仅可以提高生产效率,还能减少材料浪费。
When designing the layout, it is necessary to arrange the waste size and speed of the label reasonably according to the strength of the material, which can not only improve the production efficiency, but also reduce the material waste.
3.面材的厚度
3. Thickness of surface material
材料的厚度直接影响模切的深度,材料越厚,越容易模切。因为材料越厚,模切的公差越大,切穿底纸的几率就越小。相对而言,材料薄,容易出现切穿底纸的故障。如在同一台平压平标签模切机上分别模切80g/m2和60g/m2,底纸相同的面材。结果发现:80g/m2的材料模切排废正常,而换上60g/m2的材料,模切时经常出现排废断裂、底纸切穿和掉标现象,需要经常停机,进行垫版,浪费很大。出现这类情况有多种原因,如果使用圆压圆模切方式或减小模切面积,使用精度高的设备等,这种现象可减少或避免。所以模切薄型面材时,一定要在精度高的设备上进行,尽量减少模切面积(尤其是小标签),使用模切版生产商的模切版,另外还要注意垫版精度。
The thickness of the material directly affects the depth of die-cutting, the thicker the material, the easier the die-cutting. Because the thicker the material, the larger the die cutting tolerance, the smaller the probability of cutting through the bottom paper. Relatively speaking, thin material, easy to cut through the bottom of the paper failure. For example, in the same flat label die-cutting machine, die-cutting 80g / m2 and 60g / m2 respectively, with the same base paper. The results showed that: 80g / m2 material die-cutting waste normal, and replaced with 60g / m2 material, die-cutting often appear waste fracture, bottom paper cut through and off mark phenomenon, need to often stop, pad, waste a lot. There are many reasons for this kind of situation, if the use of rotary die-cutting or reduce the die-cutting area, the use of high-precision equipment, this phenomenon can be reduced or avoided. So die cutting thin surface material, must be carried out in high precision equipment, try to reduce the die cutting area (especially small label), use the professional die-cutting plate manufacturer's die-cutting plate, in addition to pay attention to the accuracy of pad.
面材的厚度同强度成正比,直接影响排废速度。可分别用80g/m2和60g/m2的材料做排废对比试验;结果是前者比后者的生产效率提高了20%~30%。
The thickness of the surface material is directly proportional to the strength, which directly affects the waste discharge speed. The results show that the production efficiency of 80g / m2 and 60g / m2 is 20% - 30% higher than that of the latter.
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