Manufacturing method for container with thermal insulation surface layer

Abstract

The invention provides a manufacturing method for a container with a thermal insulation surface layer. The manufacturing method for the container with the thermal insulation surface layer comprises the following steps of preparing an original substrate and respectively coating a lamination layer and a polyethene waterproof layer on two oppositely sides of the original substrate; coating foam materials on the waterproof layer; enabling one end of the original substrate to be pasted in a reverse folding mode to form into a folding edge and enabling a pasting position of the original substrate and the folding edge to be mutually pasted, wherein an exposition portion of the folding edge and the pasting position are both one of the lamination layer or the waterproof layer; an internally concave pasting portion of the folding edge is the other one of the lamination layer or the waterproof layer; the foam materials are heated and foamed to form into a foaming layer; manufacturing the container with the thermal insulation surface layer, wherein the lamination layer faces the interior of the container and the waterproof layer and the foam layer are towards the exterior of the container. Accordingly, the manufacturing method for the container with the thermal insulation surface layer can improve the pasting effect and avoid the external layer of the container from being softened when the external layer is in wet.

Description

technical field [0001] The invention relates to a method for making a container with a heat-insulating surface layer. Background technique [0002] Known containers with heat-insulating surface layers are coated with a foam layer on the outer surface of the paper to provide heat insulation. However, the foam layer is often not waterproof, or often only part of the outer surface of the container has foam. Bubble layer, when containing iced drinks, the outer surface may be softened by water droplets condensing into the paper material, which will reduce the structural strength of the container. [0003] On the other hand, as the container disclosed in Taiwan Patent M355065 or M355220 of China, its ring wall is formed by rolling up a piece of paper into a roll shape and pasting each other with two ends of the paper. Therefore, the two surfaces of the pasting belong to The inner surface and the outer surface of the container, however, generally speaking, the inner surface of the...

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Problems solved by technology

[0002] Known containers with heat-insulating surface layers are coated with a foam layer on the outer surface of the paper to provide heat insulation. However, the foam layer is often not waterproof, or often only part of the outer surface of the container has foam. Bubble layer, when containing ice drinks, the outer surface may condense and penetrate into the paper material, causing the paper material to soften and reduce the structural strength of the container

[0003] On the other hand, as the container disclosed in Taiwan Patent M355065 or M355220 of China, its ring wall is formed by rolling up a piece of paper into a roll shape and pasting each other with two ends of the paper. Therefore, the two surfaces of the pasting belong to The inner surface and the outer surface of the container, however, generally speaking, the inner surface of the container is usually coated with a plastic coating layer, and the outer surface is coated with a foam layer. The materials of the coating layer and the foam layer are usually different, and more In detail, the coating layer on the inner surface of the container must be in contact with food and must have better heat resistance and acid and alkali resistance to prevent decomposition and release toxins, so materials such as polyethylene that are easily decomposed must be avoided. However, Materials with better heat resistance and acid and alkali resistance usually have to be kneaded and processed, and the cost is high, so other plastics are usually used as the foam layer on the outer surface. Therefore, the two surfaces that are in contact with the paper belong to two types Different kinds of plastics, although plastics can become sticky after being heated, but different types of plastics are not compatible with each other, and may not even be able to bond, so it may be necessary to add an appropriate adhesive to bond paper, additional sticky The binder will increase the cost, may release toxins, and complicate the manufacturing process. Moreover, this combination of simply overlapping paper and bonding is likely to cause leakage. seams into the paper

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