| 摘要 |
PURPOSE:To easily bond and fix a PC lens to a light appliance body made of a PP resin and to enhance sealing effect in low cost, by a method wherein a seal foot part on a lens side is inserted in a seal groove filled with a hot melt to be set thereto before curing. CONSTITUTION:A hot melt 3 having melt viscosity of about 1000-30000 cps is heated by a hot melt applicator to be injected in and applied to the seal groove of a light appliance body 1. Next, the seal foot part 5 of a lens 4 is inserted in the seal groove 2 to be bonded thereto under pressure. Then, the hot melt 3 is cured in a predetermined temp. and humidity atmosphere to fix the seal foot part 5 of the lens 4 to the seal groove of the light appliance body 1 in a closely bonded state. By this method, the close adhesiveness to a PMMA resin member other than a PP resin member and glass becomes well and not only the adhesive coating property and sealability to a material to be bonded are enhanced but also the shape of the seal groove can be simplified. |
