Abstract:
A removal assembly and method for removing a submaster from a master is described. A curved tooling surface is arranged within a housing of the assembly. A first array of vacuum cups is attached to the housing adjacent a first end of the curved tooling surface, where the first array of vacuum cups are configured to provide a vacuum grip on a first portion of the submaster. A second array of vacuum cups is attached to the housing adjacent a second end of the curved tooling surface, where the second end opposes the first end, the second array of vacuum cups is configured to provide a vacuum grip on a second portion of the submaster. A rotation mechanism is configured to rotationally support the master as the master is rolled along the curved tooling surface to remove the submaster.
Abstract:
In one embodiment, an embossing drum system comprise: a mandrel (4) having outer surface with an external taper, a primary journal (10) extending from a first end of the mandrel (4), a secondary journal (12) extending from a second end of the mandrel (4), a sleeve (6) having an inner sleeve surface with an internal taper, wherein the sleeve (6) is disposed around the mandrel (4) to form a drum having a substantially constant outer diameter, and a releasable journal support (30,50) engaging the secondary journal (12), wherein a sleeve first end having a smallest inner diameter of the sleeve (6) is disposed adjacent the releasable journal support (30,50). hi one embodiment, a method of drum system maintenance comprises: releasing a journal support (30,50) on the embossing drum system and sliding the sleeve (6) off of the mandrel (4) and over the secondary journal (12).
Abstract:
The present invention provides novel curable compositions useful in the preparation of light management films and other optical articles. The curable compositions comprise (a) at least one silicone-containing surfactant, (b) at least one a multifunctional (meth)acrylate having structure I; in certain embodiments (c) at least one nanoparticulate filler; and in certain embodiments, (d) at least one monofunctional (meth)acrylate. The curable compositions may be cured to provide the corresponding cured compositions and articles made therefrom.
Abstract:
Blends of oligomeric urethane multi(meth)acrylate; optionally at least one other monomer selected from the group consisting of acrylic monomers, styrenic monomers and ethylenically unsaturated nitrogen heterocycles, preferably a polyol multi(meth)acrylate; and nanoparticles of an ethylenically unsaturated, preferably (meth)acrylic-functionalized, titanium or zirconium compound can be cured by ultraviolet radiation in contact with a photoinitiator to produce optical resinous articles having high refractive indices, haze ratings of at most 5% and other properties which may be tailored according to the desired use.
Abstract:
In one embodiment a film can comprises a surface comprising a plurality of prism structures. Each prism structure has a lateral modulation in the w direction of less than or equal to ±20% of an average pitch of the prism structures. The plurality of prism structures can have a variation in the w direction of prism peak height that is discrete and/or continuous. In one embodiment, a method for making a film can comprise forming a plurality of prism structures on a surface. The plurality of prism structures can have a lateral modulation in the w direction of less than or equal to ±20% of an average pitch of the prism structures, and wherein the plurality of prism structures have a variation in the w direction of prism peak height that is discrete and/or continuous.
Abstract:
In one embodiment, the film making process can comprise: introducing a plastic melt to a nip between a calendar roll and a resilient roll, passing the plastic melt between the calendar roll and the resilient roll to produce the film, and controlling a roughness of the film by actively cooling an external surface of the resilient roll. In another embodiment, the film making process can comprise: introducing a plastic melt having a melt temperature to a nip between a calendar roll and a resilient roll, passing the plastic melt between the calendar roll and the resilient roll to produce the film, and adjusting a roughness of the film at a constant production rate and a constant nip pressure.
Abstract:
A light management film (1) includes a first layer (10) with a thermoplastic resin and a particular phosphonium sulfonate salt, and a second layer (20) formed from a curable composition and having a refractive index of at least 1.5. The light management film exhibits reduced static electricity build-up and reduced dust attraction, making it easier to handle during fabrication of display devices such as the flat panel displays of laptop computers.
Abstract:
Blends of monofunctional and multifunctional (meth)acrylate monomers, optionally in addition to oligomeric multifunctional (meth)acrylates), can be cured by ultraviolet radiation in contact with a photoinitiator to produce optical resinous articles having a glass transition temperature of at least 35 °C and having physical properties making them suitable for use as microstructure-bearing articles.
Abstract:
A process is provided for continuously embossing a pattern onto a surface of a flowable melt and cooling the flowable melt to provide an embossed film. In one embodiment, the process includes heating a resin to form a flowable melt; discharging the melt into a first nip (18), an area between an embossing roll (20) and a backside roll (22); pressing the melt against the embossing roll and the backside roll; and forming a self- supporting film with' (29) a surface having an embossed pattern thereon. In one embodiment, the embossing roll is maintained at a temperature greater than the glass transition temperature of the resin material whereas the backside roll is maintained at a temperature less than the glass transition temperature of the resin, hi one embodiment, the invention provides an embossed film (29) frangibly fused to a carrier film (36). In another embodiment, the invention provides an embossed film (60) affixed to a backing film (52).
Abstract:
A system for the inspection of and a process for the correction of defects in a microreplicated optical display film manufacturing process. The process steps of manufacturing a master, a plurality of shims from the master, and a multiplicity of display films from each shim are integrated with a systemic defect identification and correction process. Each primary manufacturing step has its own inspection system and correction process where defect information for that step of the process is fed back and analyzed; and from that analysis the subprocess is adjusted to eliminate or reduce the detected defect. The systemic defect is identified as to its source and then fed back and analyzed in the correction step of the respective subprocess in order to cure the root of the defect.