1．觀察食品真空包裝袋的外觀。
1. Observe the appearance of the food vacuum bag.
優(yōu)質(zhì)的食品真空包裝袋在外型上沒有明顯擦劃痕跡，有沒有針孔漏氣，最主要的是檢查封口處是否合格。
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．檢查封口強度
2. Check the sealing strength
食品真空包裝袋要達到真空狀態(tài)，封口處的檢查是重中之重，檢測方法：將雙手伸入包裝袋內(nèi)，平均用力向相反方向撕裂。撕裂是封口處即使發(fā)生變形也不會分層脫落，視為封口強度高。輕輕一撕就會破碎，則視為封口輕度低。現(xiàn)實生活中CPE材料的真空包裝袋要比OPP材料強度高。
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． 滲漏性檢測
3. The leakage detection
滲透性檢測主要用著色法。檢測方法：將著色劑添加到真看空食品包裝袋內(nèi)，然后封口。將食品真空包裝袋水平放在濾紙上，五六分鐘之后查看濾紙是否變色看，最后將包裝袋反過來再次測試。
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．針孔檢測、耐穿孔檢測
4. The pinhole test, resistance to perforation test
食品真空包裝袋耐穿孔性能檢測主要采用跌落檢測法，將食品真空包裝袋從一定高度垂直跌落在粗糙的地面上。跌落后如果沒有破裂情況，則表示耐穿孔性強。
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.
