Common bubble bag no new bubble bag transparent, gas bubble gas is not a new bubble bag. One side is a bubble in the above, double bubble is in the middle, top and bottom layer PE film. More bubble bags: film thickness is slightly heavier weight per roll. Commonly used bubble bag is 5 kg/roll, the roll of film is commonly 4 kg/roll to use by itself. Thickening of the weight of 15 kg, anti-static bubble bags: generally add pigment and add anti-static, general 10-14 power of anti resistance. Kraft bubble bag, there is a bubble bag, it is white or yellow kraft paper, leather, thickening of the bubble wrap was brand new. Inside the aluminum foil bubble bag, bubble film is aluminous model above.