Composite bags appearance problem solving only three recruit

Appearance visual inspection include view on the surface of composite bags flatness, transparency, such as project. Is mainly used to check whether there is any obvious scratch on surface of composite bags and pinhole, pincer-like device has no pollution, etc. , so as to ensure the contents of the packaging are not affected. 1、“ Bag surface drawing & throughout; Check place composite bags hand center, aimed at 40 w fluorescent lamp shaking, through the reflection on the surface of the composite bags, composite bags can please chu found are there any scratches or marks on the surface, the industry is called & other; Bag surface drawing & throughout; 。 Wiredrawing phenomenon is mostly caused by bag making machine lead guide roller is not clean, so make sure guide roller clean. In addition, the guide roll back the same compound bag would produce wire drawing defects. 2, single composite bags flatness check will composite bags on the desktop, even assuming that twists and turns, composite bags surface become warped outward or inward arch, then composite bags of flatness is poor, the opposite shows good flatness. The cause of poor flatness generally have the following: bag temperature on the high side, stress of the damaged composite bag lining stiffness; Structure is not reasonable; Thickness of the material itself is not equal. 3, check some products for large area with no pattern of transparency, transparency is particularly important. Transparency of detection method is: extracting a finished bag, through the indoor light observation indirectly, if the margins have & other; Pitting & throughout; 、“ Ring & throughout; 、“ Mist & throughout; Wait for a phenomenon, explain transparency is poor, and vice shows good transparency.