Method for forming foaming layer on surface of container or container semi-finished product

Abstract

The invention relates to a method for forming a foaming layer on the surface of a container or container semi-finished product. The method comprises the following steps of: heating and stirring or kneading a thermoplastic solid binder and a plurality of solid foaming particles until the thermoplastic solid binder becomes gelatinous, and uniformly dispersing the solid foaming particles into the gelatinous binder to form a composite coating, wherein each foaming particle is formed by coating a low boiling point solvent in a thermoplastic polymer, and the heating temperature is lower than the boiling point of the low boiling point solvent; coating the composite coating on at least one part of the surface of the container by using coating equipment; and heating the container coated with the composite coating to ensure that the low boiling point solvent coated in the thermoplastic polymer is vaporized to prop up the thermoplastic polymer, so that a forming effect is generated on the surface of the container, and the foaming layer is formed and is integrated with the surface of the container.

Description

technical field [0001] The invention relates to a method for forming a foam layer on the surface of a container or a semi-finished container. Background technique [0002] General containers, in consideration of cost and usage, are mostly made of paper or plastic containers, such as: paper or plastic cups, bowls, plates or packaging containers, heat preservation containers, lunch boxes, etc. [0003] Conventional containers, however, have the following problems: [0004] 1. The paper container is only a single layer, which cannot provide heat preservation and heat insulation. If it is folded in two layers or formed into a compartment, the cost will be extremely high for disposable purposes, which is not cost-effective. [0005] 2. The surface layer of the paper or plastic container is only printed on the surface layer at most to achieve aesthetics, and the effect of three-dimensional patterns cannot be formed. [0006] 3. For the paper cups currently used, in order to prev...

AI Technical Summary

Problems solved by technology

[0004] 1. The paper container is only a single layer, which cannot provide heat preservation and heat insulation effects. If it is folded in double layers or formed into compartments, the cost will be extremely high for disposable purposes, which is not cost-effective.

[0005] 2. The surface layer of the paper or plastic container is only printed on the surface layer in order to achieve aesthetics, and the effect of three-dimensional patterns cannot be formed.

[0006] 3. For the paper cups currently used, in order to prevent scalding, another plastic holder is required to support the paper cup, but the use of the holder must increase the inconvenience of the holder, and after use, the holder must be stored, so there is Weaken the convenience of using the paper cup

Images