Sealing structure of paper meal box

Abstract

A sealing structure of a paper meal box comprises a paper box body and a box cover mutually buckled with the box body, the upper edge of the paper box body is provided with a turned edge turned outwards, the cross section of the turned edge is in a major arc shape, and an arc top protruding outwards is roughly arranged in the middle of the height of the turned edge; the packaging box is characterized in that the box cover comprises a paperboard, the paperboard is matched with the opening in the upper end of the box body in shape, the outer edge of the paperboard is connected with a frame formed by injection molding of biodegradable materials, the frame is provided with a side wall perpendicular to the paperboard, and the inner side of the side wall is provided with an inclined face protruding relative to the side wall from top to bottom; the bottom of the inclined face is connected with a protruding clamping rib, and in the buckling process, the clamping rib and the inclined face press the arc top of the curled edge to be elastically deformed and embedded into the curled edge. The pot has good sealing performance and is suitable for containing food with soup.

Description

technical field [0001] The invention relates to the technical field of disposable lunch boxes, in particular to a sealing structure of a paper lunch box. Background technique [0002] The currently used takeaway lunch boxes include plastic containers and paper containers, among which plastic containers have been widely used for many years, but the water tightness of plastic lunch boxes has not been solved. The box body and box cover of plastic material are all hard materials, and it is difficult to form a structure with good water tightness between them. In recent years, plastic pollution has become more and more serious. Various places have successively promulgated plastic restriction orders to limit or prohibit the use of disposable plastic products within a time limit. The development of paper lunch boxes and fully degradable materials is increasing day by day. At present, although fully biodegradable materials (such as PLA) have begun to gradually replace disposable PP ...

AI Technical Summary

Problems solved by technology

At present, although fully biodegradable materials (such as PLA) have begun to gradually replace disposable PP plastic containers in small quantities, due to the high price of materials and certain difficulties in processing and molding processes, they have encountered great difficulties in introducing them to the market, especially those without cost-effective

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