Method of Quality Inspection of Vacuum Composite Packaging marijuana mylar bagVacuum composite packaging marijuana mylar bags have good barrier properties, heat-sealing properties, and moisture resistance, and are acid-resistant, alkali-resistant, and wear-resistant, so they are widely used in the inner and outer packaging of various products. As people’s requirements for the quality of vacuum-packed composite marijuana mylar bags are increasing day by day, packaging companies are paying more and more attention to the quality inspection of flexible packaging composite marijuana mylar bags. Based on years of production experience, three-dimensional marijuana mylar bag manufacturers have made a summary of the detection methods of composite marijuana mylar bag products, hoping to be helpful to our friends. 1, appearance visual inspectionAppearance visual inspection includes the inspection of the flatness and transparency of the composite marijuana mylar bag and other items. It is mainly used to detect whether there are obvious scratches and pinholes on the surface of the composite marijuana mylar bag, and whether there is any dirt on the sealDyeing etc. Our company has a relatively complete set of appearance inspection methods, as follows. (1)Put the composite marijuana mylar bag in your handcenter, align40WThe fluorescent lamp shakes gently, and through the reflected light on the surface of the composite marijuana mylar bag, you can clearly find whether there are scratches or marks on the surface of the composite marijuana mylar bag, which is often called in the industry”Brushed marijuana mylar bag surface”If the wire drawing is serious, you should find out the fault according to the actual situation, reduce the impact to the lowest point, and ensure the product quality. We found through observation that most of the wire drawing phenomenon is caused by the dirty guide rollers of the marijuana mylar bag making machine, so it is necessary to ensure that the guide rollers are clean. In addition, if the guide roller does not rotate, it will also cause wire drawing failures in the composite marijuana mylar bag. The reason why the guide roller does not rotate is mostly caused by the lack of oil in the bearing, so good lubrication is the fundamental condition for the bearing to rotate. (2)Inspection of the flatness of composite marijuana mylar bags. The specific method is: take several samples of finished marijuana mylar bags for”air to ground”Drop it, let it land naturally and the landing site should be clean, and observe the situation after the composite marijuana mylar bag lands. If the composite marijuana mylar bag bends when it hits the ground, warping outward or arching inward, it means that the flatness of the composite marijuana mylar bag is poor, otherwise it means that the flatness is good.The reasons for the poor flatness are generally as follows: the marijuana mylar bag-making temperature is too high, which has destroyed the stress stiffness of the inner layer of the composite marijuana mylar bag; the structure is unreasonable; the thickness of the material itself is uneven. We noticed that whenPET/PEandBOPP/PET/PEThe total composite thickness of the structure does not exceed80μm, prone to poor flatness. (3)Visual inspection of appearance also includes inspection of transparency. For some products, transparency is particularly important due to large areas without patterns. The detection method of transparency is: take a finished marijuana mylar bag and observe it through the indoor indirect light source.”Pitting”,”Ring”,”foggy”And so on, it means that the transparency is poor, otherwise it means that the transparency is good.There are many reasons for the poor transparency. For example: when compounding, because the color of the compound glue itself is yellowish or reddish, it will produce a corresponding color cast when transferred to the compound marijuana mylar bag, which will affect its transparency; if the material itself has poor transparency ,Have”foggy”will also affect its transparency, so when the material is put into the warehouse, the quality should be strictly controlled, so that unqualified raw materials will not be put into the warehouse. In addition, equipment packaging marijuana mylar bag manufacturers tell you that different composite raw materials have different transparency, such as castingCPPClarity than blown coextrudedCPPmuch higher transparency.