Inward-wound seal packaging bag for ring-shaped cylindrical object and packaging method thereof

Abstract

The invention relates to an inward-wound seal packaging bag for ring-shaped cylindrical object and packaging method thereof, which comprises a flexible bag body corresponding to the inner surface and the outer surface of the ring-shaped cylindrical object, wherein two ends of the cylindrical bag body are open, and colloid is arranged at an opening on one side of the bag body; and the outer layer of the flexible bag body is made of plastic film and the inner layer of that is made of gas phase rustproof film coated on the inner wall of the outer layer. The sealing packaging is achieved by the following steps: the bag body is covered on the surface of a steel coil in a manner of aligning the edge of the ring-shaped cylindrical object like the steel coil; the rest of the bag body penetrate out from a ring-shaped hole of the steel coil; and the turned-over edge of the bag body is jointed with the bag opening previously covered on the other side of the steel coil surface via the colloid. In the invention, the VCI (Volatile Corrosion Inhibitor) gas phase rustproof film is used to seal the packaging, and the inner wall and the outer wall of the steel coil are fully coated, so that the sealing is good, the rustproof period is long, the ideal rustproof effect can be obtained, the substantive breakthrough in the rust prevention during the transportation to metal products is achieved, and the economic and social benefits are excellent.

Description

Technical field: [0001] The invention relates to a container for storing or transporting articles or materials, in particular to an inner wrapping sealed packaging bag for annular cylindrical articles and a packaging method thereof. Background technique: [0002] With the rapid development of the national economy and the improvement of people's living standards, people pay more and more attention to the packaging of items. Some packaging is to improve the appearance of products and give people a friendly and gorgeous feeling; From the perspective of the product, carry out the necessary maintenance. The inventors' studies belong to the latter. In steel mills, wharves, and warehouses, it is common to have circular columnar steel coils stacked in the open air. These steel coils are usually coated with a layer of anti-rust oil on the surface to prevent corrosion of the steel. Rain, it is difficult to effectively prevent the occurrence of rust. According to relevant data, the ...

AI Technical Summary

Problems solved by technology

In steel mills, wharves, and warehouses, it is common to have circular columnar steel coils stacked in the open air. These steel coils are usually coated with a layer of anti-rust oil on the surface to prevent corrosion of the steel. Rain, it is difficult to effectively prevent the occurrence of rust

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