Micro-pressure difference self-sealing box opening of airtight box
A micro pressure difference, airtight box technology, applied in the direction of sealing, closing, packaging, etc., can solve the problems of loss of sealing effect, deformation of sealing strip, air leakage, etc., and achieve good sealing effect
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[0009] It has box openings 1 and 5 and sealing strips, said sealing strips are made of hard plastic box opening support 2, a sealing strip 3 with upper and lower extended sides made of silicon rubber and an extended side support strip made of sponge 4 is combined in order from the outside to the inside, and the extended side support strip 4 is placed between the two extended sides of the sealing strip. When the contact surface of the box mouth support 2 and the sealing strip 3 is flat, it can be glued and connected, or it can be inserted and combined with each other in a convex and concave shape as shown in the figure. At this time, no glue is needed and it is easy to disassemble. The extended edge should be very thin to facilitate the creation of a pressure differential across the extended edge.
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