1. Visual inspection: the appearance of the drum test including closure, barrel (bottom), the barrel body, adhesive, printing projects, such as sensory inspection and measuring tool inspection method.

1) closure is the main part of drum, the open sex, flexibility, interchangeability and barrel body joint sex have a direct impact on the quality of the packaging, so the test several times when the sealing device and paper barrel mouth open and lock in action.

(2) the barrel body test, no mechanical scratches on the surface of a bucket outside phenomenon, barrel body round, no obvious loss of round, dent, skew, no wrinkles, does not glue, paint coating evenly, no leakage, no bubble no obvious sag, drum circle edge paperless tongue. Barrel diameter size should be on the cardboard barrels, the bottom surface of conjugate direction measuring diameter.

(3) lid (bottom) inspection mainly include the use of material and size detection: required lid (bottom) adopts five-layer plywood or other equivalent material, but does not allow joining together. Cover (bottom) surface should be smooth, no warping, shape Angle, without damage. The size of the lid (bottom) permission shall control in the tolerance range.

(4) paper barrel with adhesive. Paper barrel and often on the production process of adhesive and agents for PVA water-soluble adhesives, the main materials and fiber materials is mainly used for bonding, are not allowed to use adhesives containing toxic pollution have this solvent and migration.

(5) printing: printing appearance mainly including name of commodity, origin, the content of the batch, net weight, gross weight, shipping mark, printed picture word clear smooth, firm adhesion, no running ink.

Performance inspection: 2. Paper drum drum performance test has two: drop test and the stacking test.

(1) drop test: temperature and humidity of sample pretreatment: temperature 20 + 2 ℃, the temperature of 65 + / - 5%, time of 48 hours, barrel should be fill in dry sand and sawdust mixture reaches maximum hold 95% of the quality and volume, and closed, the mixture of temperature and humidity in accordance with sample pretreatment conditions. Drop test technology has two parameters: the test number (6), and drop height (0.8 m). Test method: after the pretreatment of sample with test equipment to the scheduled heights, after being stable, start off device, make sample moment for a free fall, once every fall, the fall, should first make the bottom edge of each drum is on the ground collision, then make the end face of each barrel outer collisions with closure handles the adjacent point on the ground. After test, check whether the lid (bottom) is off, content with and without leakage.

(2) the stacking test. This test is to simulate the packing pieces in the actual process of storing and stacking requirements, stacking sample 3 only, stacking height is 3 m. Test method: put the sample stacking on the ground, at the center of the loading plate on top of the sample position, and then in the case of no impact, put the weight on the loading plate, the uniform load and contact plate, Jordan farmar and load the total weight of the tablet with the specified value of the error should be controlled within + / - 2%. Stacking load is 4900 n, 24 hours without leakage, not broken, the accumulation of permanent deformation shall not influence the paper barrel.