Preparation process of adhesive for aluminium-foil tape

Abstract

The invention discloses a preparation process of an adhesive for an aluminium-foil tape. The preparation process comprises the following steps of: (1) adding water into a reaction pot, heating to 75 DEG C, then slowly adding polyvinyl alcohol, heating to 92-96 DEG C and dissolving the polyvinyl alcohol completely; (2) cooling the polyvinyl alcohol solution to 81-86 DEG C, dripping hydrochloric acid, then stirring for 25 minutes, adding formaldehyde to carry out condensation for about 55 minutes; (3) cooling after adding the formaldehyde for condensation, adding urea to carry out amination treatment, and after a sample is detected and qualified, regulating pH to be neutral and cooling to 45-55 DEG C. After the adhesive for the aluminium-foil tape prepared by the preparation process is used on an aluminium foil, the aluminium foil has the advantages of firm adhesion and waterproof effect and the like; the process is synchronous with a pipe-plate evaporator, so that the production efficiency is greatly improved.

Description

technical field [0001] The invention relates to the field of glue for aluminum foil of a return air pipe, and specifically belongs to a preparation process of an aluminum foil tape adhesive. Background technique [0002] Tube-sheet evaporators are widely used in the refrigerator industry. The tube-sheet evaporator needs to wrap the air return pipe and capillary with aluminum foil during production. Generally, aluminum foil with glue is used to wrap the air return pipe and capillary. The aluminum foil tape in the prior art has a layer of paper attached to the adhesive surface. , It is necessary to tear out the paper when using it, which not only wastes resources but also reduces production efficiency. Contents of the invention [0003] The purpose of the present invention is to provide a preparation process of aluminum foil tape adhesive, which avoids the paper tearing process and is carried out synchronously with the tube sheet evaporator, greatly improving the production...

AI Technical Summary

Problems solved by technology

The tube-sheet evaporator needs to wrap the return air pipe and the capillary with aluminum foil during production. Generally, aluminum foil with glue is used to wrap the return air pipe and the capillary. The aluminum foil tape in the prior art has a layer of paper on the adhesive surface. , you need to tear out the paper when using it, which not only wastes resources but also reduces production efficiency