Method for producing a filter for the adsorption of volatile hydrocarbons

摘要

A system (10) and method for manufacturing ophthalmic devices, in particular contact lenses or intraocular lenses, the system comprising: at least one injection molding machine for manufacturing a cup bottom part (202) and cup top part (204) to form a cast mold, a cooling station (30), an injection assembly (120) arranged for injecting an amount of monomeric material into the cup bottom part, a curing assembly (130), a first optical inspection assembly (140) for determining at least one first optical cup part parameter, a second optical inspection assembly (150) for determining at least one optical combination parameter of the combination of the cured monomeric material formed into a lens and the cup part that bears the lens, and an electronic control (14) provided with a calculation module for determining at least one optical lens parameter of the lens on the basis of the cup part parameter and the combination parameter. Possibly, production parameters can be adjusted on the basis of trend changes of the lens parameters of produced lenses.

主权项

1. A method of producing a filter for adsorbing volatile hydrocarbons from a nonwoven fabric, wherein the nonwoven fabric comprises thermally fusionable fibers, wherein a binder is used to bind activated carbon particles to the surface of the fibers, wherein the fibers consist of at least one thermoplastic polymer having a melting point or melting range above 200° C., wherein the nonwoven fabric is brought into a desired shape using an embossing mold by exertion of pressure and by a temperature of at most 190° C., wherein a plurality of plies of the nonwoven fabric are bonded together by the exertion of the pressure and by the temperature, wherein the nonwoven fabric in the step of bringing it into shape is sufficiently densified in at least one first region to retain the shape and less densified in at least one second region in order thereby to make better adsorption possible in the second region.