Boiled bag test standard

1. Sampling representativeness (1) when the first sample confirmed, a continuous sampling water bag quantity should cover all the length of the sealing knife, can effectively avoid the negative aspects of a local sealing leak. (2) the sample is in the water bag after debugging to normal sampling, adjust the heat sealing temperature, pressure and machine speed, change membrane after volume should be confirmed again. 2. Bounding strength testing to determine the effectiveness of the method (1) the right approach is to poach bag heat-sealing edge cut after 20 ~ 30 mm narrow strip along the direction perpendicular to the sealing line tear, cannot use of bamboo on the way. (2) should not have 2 mm above the sealing edge width can tear phenomenon. Otherwise, the computer test intensity of qualified, but the heat sealing layer is not fully integrated together, resulting in a decline in the sealing strength of the water more and boiled torn bags. After boiled two inner PE bag from the edge sealing interface detaching, belong to heat sealing side not firm. 3. Boiled experiment points ( 1) Sampling methods (1) water bags of commissioning to normal, the longitudinal inspection personnel in commissioning the bag out random continuous extraction of several sample bags in each row, Sampling number covering the longitudinal knife sealing length) The water boiling test after encapsulation. (2) one out of two or more bag sample application marker to clear out of the bag, and left and right logo can accurately determine a thermal rickety sealing knife position. (3) the normal production process conditions have obvious changes, such as machine speed, temperature adjustment, etc. , must make a new sampling water experiment was carried out. (4) after each shift hand-over, should be boiled resample performance testing. (5) to find nonconforming product, in the process of isolation treatment in a timely manner. （ 2) Test conditions (1) in water bag in 1/3 ~ 1/2 capacity of water, as far as possible when the sealing and exhaust. If too much air sealed, easy to cause misjudgment. When boiling test stamp to slightly increase the pressure inside the bag. (2) the boiling time according to the customer's conditions of use, or according to relevant test standard. （ 3) Test standard (1) bag no global or local wrinkling, delaminating phenomenon; Feel is detection of peel strength after boiling. (2) printing ink no discoloration or bleeding; (3) no leakage bag bag broken phenomenon; No obvious run sealing side ( Running the width control within 2 mm) 。