Three-layer air sealing body

Abstract

The invention provides a three-layer air sealing body. The three-layer air sealing body comprises two outer films, an inner film arranged between the two outer films, a plurality of air chambers, an inflation channel, an intermediate heat-seal line and longitudinal heat-seal lines, wherein heat-resistant blocks coated with a heat-resistant material are alternately arranged on the inner wall of the upper part of the inner film; the intermediate heat-seal line stretches over the heat-resistant blocks and the longitudinal heat-seal lines; the two outer films are adhered to the position, which is not provided with heat-resistant blocks, of the inner film so as to separate the inflation channel and the air chambers; the inflation channel is formed between two outer films on one side of the intermediate heat-seal line; and an air inlet is formed in the heat-resistant block between two adjacent longitudinal heat-seal lines between the inner film and one of the outer film, and enables the inflation channel and the air chambers to be communicated. According to the three-layer air sealing body, a traditional four-layer film structure is replaced by the three-layer film structure, so that materials are saved, the air intake speed is higher, the dead weight is smaller, the folding degree is reduced during air intake, and the air intake is uniform.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of packaging consumables, in particular to a novel air sealing body, which is composed of three layers of film. [0003] 【Background technique】 [0004] The air-tight body is widely used because of its good anti-shock and anti-drop performance. The prior art is: an air-tight body, including an anterior adventitia, a posterior adventitia, an anterior intima and a posterior intima between the anterior adventitia and the posterior adventitia, a plurality of air chambers, an air-filled channel, The middle heat-sealing line and the longitudinal heat-sealing line; the upper inner wall of the anterior intima and / or the posterior intima is provided with heat-resistant blocks at intervals, and the heat-resistant blocks are coated with heat-resistant materials; the middle heat-sealing line spans each heat-resistant block and Longitudinal heat-sealing line, bonding the anterior outer membrane, anterior inner m...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of the above-mentioned technical solution are: two layers of outer film and two layers of inner film are used, and the number of layers is large, resulting in waste of materials; when air intake, four layers of film need to be washed away from the middle, resulting in difficult and slow air intake; four layers Membrane structure products are heavy in weight and need to be improved in terms of lightness; the four-layer membrane produces many folds when inflated, resulting in uneven air intake when inflated, and even one air inlet is not opened, and the unopened part is surrounded by wrinkles together, affect the opening of subsequent air intakes

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