1．观察食品真空包装袋的外观。
1. Observe the appearance of the food vacuum bag.
优质的食品真空包装袋在外型上没有明显擦划痕迹，有没有针孔漏气，最主要的是检查封口处是否合格。
Quality of food vacuum bag in no apparent brush strokes trace on the exterior, is there a pinhole leak, the most important is to check whether qualified pincer-like device.
2．检查封口强度
2. Check the sealing strength
食品真空包装袋要达到真空状态，封口处的检查是重中之重，检测方法：将双手伸入包装袋内，平均用力向相反方向撕裂。撕裂是封口处即使发生变形也不会分层脱落，视为封口强度高。轻轻一撕就会破碎，则视为封口轻度低。现实生活中CPE材料的真空包装袋要比OPP材料强度高。
Food vacuum packaging to achieve a vacuum, pincer-like device check is a top priority, detection: the hands into bags and average tear force to the opposite direction. Tear is pincer-like device even if the deformation will not layered peeling, as the sealing strength is high. Gently tear will be broken, as a seal slightly lower. In real life in vacuum bags of CPE material is higher than the OPP material strength.
3． 渗漏性检测
3. The leakage detection
渗透性检测主要用着色法。检测方法：将着色剂添加到真看空食品包装袋内，然后封口。将食品真空包装袋水平放在滤纸上，五六分钟之后查看滤纸是否变色看，最后将包装袋反过来再次测试。
Permeability testing mainly use staining method. Detection: add coloring to the true bearish on food packaging, and then the sealing. Put the food vacuum packaging level on the filter paper, five or six minutes later see if filter paper discoloration, finally will bags, in turn, test again.
4．针孔检测、耐穿孔检测
4. The pinhole test, resistance to perforation test
食品真空包装袋耐穿孔性能检测主要采用跌落检测法，将食品真空包装袋从一定高度垂直跌落在粗糙的地面上。跌落后如果没有破裂情况，则表示耐穿孔性强。
Food vacuum bags punch resistance testing mainly USES the drop test, food vacuum packaging from a certain height plummeted on rough ground. Fall behind if not broken case, strong resistance to perforation.
