Polypropylene coated paper container capable of being used in microwaves and processing technology thereof

Abstract

The invention relates to a polypropylene coated paper container capable of being used in microwaves and a processing technology thereof. The paper container comprises a container wall and a container bottom, the container bottom is connected to the lower side of the container wall, a container opening is formed at the upper end of the container wall, PP lamination layers are arranged on the inner wall of the container wall and the inner wall of the container bottom correspondingly, the container wall is bonded through the PP lamination layers, and the container wall and the container bottom are bonded through the PP lamination layers. A PP reinforcing layer is further arranged at the inner connecting position of the container wall and the container bottom, and a first turned edge is arranged at an opening at the top end of the container wall. The processing technology comprises the following steps of carrying out PP lamination and die cutting on raw paper to obtain container wall-shaped paper and the container bottom, heating the edge part of the container wall-shaped paper, coiling to obtain the container wall, loading the container wall into the container bottom, and heating and bonding to obtain the pre-formed container; spraying PP lamination liquid into an inner cavity of the pre-formed container, and heating to form the PP reinforcing layer; and curling the top of the container wall to obtain the PP coated paper container. The paper container has the effect of facilitating microwave heating; and the processing technology has the effect of improving the processing efficiency and quality.

Description

technical field [0001] The present application relates to the field of paper containers, in particular to a microwaveable PP coated paper container and its processing technology. Background technique [0002] Paper containers such as paper cups and paper bowls are a very commonly used holding tool in people's lives, especially in food packaging, they are often used to hold water, beverages, and various edible liquids or foods. However, there is still a certain gap between the heat insulation and heat resistance of the single-layer paper container commonly used at present and the use requirements of people, which brings inconvenience to people's daily use. [0003] The Chinese utility model patent with application number 201621179515.3 discloses a high-heat-sealable high-strength paper container, which includes a cup body and a cup bottom. layer, a barrier layer and an inner film layer, the outer film layer is formed by bonding two ends of fan-shaped paper, the heat insulati...

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Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that because the PE coating layer on the inside of the fan-shaped white cardboard has a low melting point, the PE coating layer will melt when heated in a microwave oven, resulting in a decrease in the stiffness and barrier properties of the paper container, which is inconvenient. Disadvantages of Microwave Heating

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