Sealed file cover with two-way air valve
A file bag and air valve technology, applied in folders, printing, etc., can solve problems such as difficult protection, poor airtightness, and mildew
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[0023] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.
[0024] Such as Figure 1-11 As shown, the embodiment of the present invention relates to a sealed file bag equipped with a two-way air valve, including a zipper 4, an engineering plastic bag 1 and a zipper 3, and the upper opening of the engineering plastic bag 1 is provided with a zipper 4, The engineering plastic bag 1 is made of engineering plastics added with a flame retardant and coated with an aluminum layer on the surfa...
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