Air seal and manufacturing method thereof

Abstract

The invention provides an air seal and a manufacturing method thereof. The air seal comprises a first external membrane, two internal membranes, a first transverse heat sealing line, a second external membrane, longitudinal heat sealing lines, closed gas columns and gas inlets, wherein the two internal membranes are positioned between the two ends of the first external membrane; a heat-resistant material is coated between the two internal membranes; the first transverse heat sealing line is used for adhering the internal membranes to the first external membrane, and is positioned at one end of each of the internal membranes and between the two ends of the first external membrane; the second external membrane is laminated on the first external membrane, so that the internal membranes are positioned between the first external membrane and the second external membrane; the longitudinal heat sealing lines are used for adhering the first external membrane, the second external membrane and the internal membranes; the closed gas columns are positioned between adjacent longitudinal heat sealing lines in the first external membrane and the second external membrane; and the gas inlets are positioned at the position where the longitudinal heat sealing lines are laminated with the heat-resistant material, so that gas is inflated into the gas columns through the gas inlets. In the air seal and the manufacturing method thereof, the position of an air valve structure can be adjusted as required without changing length of the gas columns, and the buffer protection effect of the air seal is effectively maintained.

Description

technical field [0001] The invention relates to the technical field of packaging, in particular to an air-tight body and a manufacturing method thereof. Background technique [0002] The air-sealed body is made of resin film, which is heat-sealed to form an air column in a sealed state, and is equipped with an inflation port for inflation. When the gas is filled into the air column through the inflation port, the air-sealed body can be used for inner packaging as a buffer material. [0003] Existing air seal structures such as U.S. Patent No. 7568508, titled "Continuously inflated air seal and its manufacturing method", use heat sealing means to generate heat seal lines, so as to form multiple air columns by adhering two outer films And the gas-filled channel at one end of the multiple gas columns, and the inner film is provided between the two outer films to form the gas valve structure, so that the gas in the gas-filled channel is filled into multiple gas columns through ...

AI Technical Summary

Problems solved by technology

[0004] However, this kind of air sealing body structure must be provided with an air valve structure at a specific position, and the position of the air valve structure cannot be changed arbitrarily, thus limiting the scope of application of the existing air sealing body structure. Furthermore, if the air valve structure is moved position, such as moving towards the direction of the air column, this kind of setting will inevitably shorten the length of the air column, which in turn will affect the buffer protection effect of the air seal structure

[0005] Therefore, the prior art still lacks an air sealing body that can adjust the position of the air valve structure without changing the length of the air column, so as to effectively maintain its cushioning protection effect

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