Bubble wrap packing has valve mechanism formed inside upper and lower film, and heat resistant element between upper and lower fine film, with sealing seam formed by hot pressing between each two adjacent bubbles

摘要

The bubble wrap packing (1) has a valve mechanism formed inside an upper and a lower film. A heat resistant element lies between an upper fine film (25) and lower fine film (26), and a sealing seam (31) is formed by hot pressing between each two adjacent bubbles (10). An air passage (14) is formed at right angles to the bubbles and in communication with them. The air passage is adjacent to the valve mechanism and has an air valve on one end. Several connecting points (34) are formed on a surface of the upper film near to the air passage.