Why use water-based acrylic adhesive to fix Braun tube explosion-proof tape?

Generally, because Braun tubes are made of glass and maintain a vacuum inside, they are susceptible to being damaged by external forces applied to them. Therefore, the Braun tube cannot be fixed directly into a box or shell. Instead, an explosion-proof tape made of the whole plant is adhered to the outer perimeter of the Braus tube, and then the explosion-proof tape is fixed to the box or shell.

If the explosion-proof tape is secured to the Braun tube by means of a cushioning tape, it is possible to prevent damage to the Braun tube in the event of an internal explosion caused by external force or accident and to minimize the area of debris scattering. The demand for Braun tubes has been increasing due to the rapidly developing information technology market which demands better display media. In particular, Braun tubes for traditional television sets are growing in size and quality, and expensive color Braun tubes and flat panel displays with high resolution have been developed for the next generation of computer monitors, oversized color television sets, high-definition television (daily DTV), etc.

Before Braun tubes are marketed as final products, It goes through many assembly steps and rigorous testing steps. In the final test after completion of assembly, defective parts that do not provide satisfactory performance due to defects or errors in the assembly process are eliminated. In this case, the final product is so defective that it has to be disassembled so that the problem can be fixed and then reassembled for the market. During the disassembly process, the tape attached to the Braun tube for explosion protection must be removed.

However, because the adhesive layer is formed during heat treatment at temperatures above 200℃ for 30 to 40 minutes in the Braun tube assembly process, the tape is usually firmly attached to the Braun tube, making its removal quite difficult. Up to now, the removal of the adhesive layer during the disassembly process has been carried out using an organic solvent dissociation or by physical force.

However, these methods take a long time and may cause other problems, such as environmental pollution and damage to the periphery of the brauer tube. These problems are particularly acute for tape prepared with an oil-soluble adhesive. The explosion-proof tape used to secure Braun tubes consists of an adhesive and a tape base material. Widely used as adhesives, oil-soluble acrylic adhesives have the advantages of low price, excellent adhesion and simple production process.

However, the use of oil-soluble propionic acid adhesives is regulated in developed countries due to the risk of fire or toxic volatile vapors and environmental pollution in their production and reproduction processes. Therefore, we focus on the development of water-based adhesives to replace oil soluble adhesives, and make them compared to oil soluble adhesives with excellent performance and reasonable price.