Air sealing member capable of opening air valve naturally and manufacturing method of air sealing member

Abstract

The invention provides an air sealing member capable of opening an air valve naturally and a manufacturing method of the air sealing member. A heat-resisting material is firstly coated in a reserved area between two inner membranes, the two inner membranes are overlapped between two outer membranes, an inflatable channel and an air column are formed by means of heat sealing, air inlets are formedat the parts of the two inner membranes, on which the heat-resisting material is coated, by means of heat sealing, a plurality of heat sealing blocks are formed in the inflatable channel by adhering by means of heat sealing, wherein the plurality of heat sealing blocks are tapered gradually from one side close to a first horizontal heat sealing line to the other side. In an air inflation process,the two outer membranes of the inflatable channel are pulled outwards in a vertical direction, the inflatable channel is tightened in a horizontal direction because of fall formed by the heat sealingblocks, the two inner membranes are squeezed by the multiple heat sealing blocks to be pulled outwards, and thus the air inlets are opened; after air enters the air column, the two inner membranes are pressed to close the air column. Therefore the air sealing member can automatically open the air inlets to realize continuous air inflation in the air inflation process, and the purpose of saving air inflation time is achieved.

Description

technical field [0001] The invention relates to the technical field of packaging, in particular to an air sealing body with a naturally open air valve 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] Known air-tight structure such as the patent of Japanese utility model kaiping No. 5-95851 "sealed bag for fluid" is respectively provided with mutually independent check valves in each air column, and the inflow port at the top of each check valve is connected to the The heat-sealed lines are aligned and glued together, and when the gas is filled into the inflatable channel, the inflatable channel expands to open the check valve so that the gas can be i...

AI Technical Summary

Problems solved by technology

However, because the check valves of this structure are independent of each other, each air column is inflated separately, and multiple air columns cannot be inflated at the same time. Moreover, it is quite cumbersome to manufacture, and each check valve must be placed one by one. Heat-sealing is carried out at the predetermined position in the air column. Once the position of the check valve or the adhesive position of the heat-sealing mold is shifted, the check valve cannot be fixed in the air column, or the inlet at the top exceeds the heat-sealing mold Adhesive heat sealing line will cause the gas to be filled into the inflatable channel. Although the inflatable channel expands, the check valve cannot be opened with the expansion of the inflatable channel, resulting in the gas not being able to be inflated into the air column.

[0004] Another kind of air sealing body structure is disclosed in Taiwan Patent No. 00587049 "The installation structure of the switch valve of the sealing body and the manufacturing device of the sealing body with the switching valve", wherein the switch for air entering the sealing body adopts two inner membranes Adhere to one side of the outer membrane to form the passage of the switch valve. When inflated, the sealing body expands to block the passage. This switch valve only records the structure of how to block the air in the sealing body from leaking out, but when the air is introduced into the channel Inflated with gas, even if the two outer membranes are pushed apart by the gas, the on-off valve will not be pulled apart with the action of the two outer membranes, so the two inner membranes of the on-off valve are still attached. Attached together without opening the air passage inlet, so air cannot automatically enter the seal if it is designed

[0005] Therefore, the air sealing body in the prior art does not have the function of automatically opening the air inlet, and its structure needs further improvement.

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