초록 ▼

A resin bonding system which bonds an implosion protection panel to the faceplate of a CRT tube and is cured by exposure to ultraviolet radiation. The resin bonding system is designed for differential adhesion so that the faceplate separates more easily from the resin than does the implosion protect

A resin bonding system which bonds an implosion protection panel to the faceplate of a CRT tube and is cured by exposure to ultraviolet radiation. The resin bonding system is designed for differential adhesion so that the faceplate separates more easily from the resin than does the implosion protection panel, thus achieving superior implosion performance.

대표청구항 ▼

An evacuated display device comprising a glass faceplate member, a glass implosion protection panel member, and an adhesive system bonding said panel to said faceplate and composed and adapted to adhere substantially more strongly to one of said members than to the other. A cathode ray tube comprisi

An evacuated display device comprising a glass faceplate member, a glass implosion protection panel member, and an adhesive system bonding said panel to said faceplate and composed and adapted to adhere substantially more strongly to one of said members than to the other. A cathode ray tube comprising: an implosion panel having an inner surface; a first resin layer strongly bonded to the inner surface of said implosion panel, said first resin layer having a relatively high tensile strength and a relatively high elongation, a thickness of about 20 to 40 mils, and having a composition comprising the following esters in percentages by weight: (a) 40 to 90% multifunctional urethane acrylate oligomer; (b) 10 to 55% monofunctional acrylic monomer, including－ 0 to 30% caprolactone acrylate, 10 to 30% isobornyl acrylate, and 0 to 30% methoxy hexanediol acrylate; (c) 0 to 20% difunctional acrylic monomer; and (d) 0 to 10% trifunctional acrylic monomer; a faceplate having an outer surface, a second resin layer weakly bonded to the outer surface of said faceplate, said second resin having a thickness of about 5 to 15 mils, and having a composition comprising the following esters in percentages by weight: (a) 30 to 70% multifunctional urethane acrylate oligomer; (b) 15 to 55% monofunctional acrylic monomer, including－ 0 to 30% caprolactone acrylate, and 0 to 25% isobornyl acrylate; and (c) 0 to 50% difunctional acrylic monomer, including－ 0 to 30% hexanediol diacrylate, and 0 to 20% triethylene glycol diacrylate; (d) 0 to 40% trifunctional acrylic monomer; and (e) 0.2 to 2% releasing agent; said implosion panel being bonded to said faceplate by means of said first and second resin layers. A method of assembling, and disassembling as necessary, an implosion system for a cathode ray tube, comprising: providing a transparent implosion panel which is relatively thin and flexible in comparison with the cathode ray tube faceplate; and introducing between said implosion panel and said faceplate an adhesion system characterized by having the property of adhering relatively strongly to the rear surface of said implosion panel but relatively weakly to the front surface of said faceplate; and when necessary to salvage the tube, introducing a wedging element between said implosion panel and said faceplate, and impacting said wedging element to drive it between said faceplate and said panel to debond said implosion panel from said faceplate along the relatively weakly adherent interface between said adhesion system and said faceplate front surface.