摘要:
An apparatus for processing a film includes a conveyor and an isolated takeaway device. The conveyor includes gripping members that hold opposing edge portions of the film and convey, under influence of a drive member, the film along a machine direction within a stretching region of the apparatus. The conveyor, over substantially the entire stretching region, is configured and arranged to provide diverging, substantially parabolic paths along which the gripping members move to stretch the film. The isolated takeaway device receives the film from the conveyor and includes gripping members to grasp opposing takeaway regions of the film directly from the stretching region and convey the film in the machine direction. In another embodiment, the conveyor provides diverging curvilinear paths along which the gripping members move to stretch the film. An isolated takeaway device includes opposing flexible, continuous gripping mechanisms for grasping opposing takeaway regions of the film.
摘要:
The present disclosure pertains to a glide assembly for a watercraft float having a base with a bottom surface substantially mated to a watercraft receiving area of the float and a cavity, a glide member, an axle, and a securing mechanism allowing for the glide assembly to be positioned at different locations on the float, where the glide assembly reduces the amount of force required to receive and launch the watercraft.
摘要:
A stretcher for substantially uniaxially orienting a film includes a plurality of gripping members to hold opposing edge portions of the film, paths along which the gripping members travel to stretch the film in a stretching region, and a drive mechanism to convey the film and gripping members along a machine direction. At least a portion of the paths in the stretching region define diverging, curvilinear courses disposed in-plane. The paths are configured such that during the stretching an extent of uniaxial character, U, is between zero and unity and a minimum value of an extent of uniaxial character, U, is at least 0.70 over a final portion of the stretching after achieving a TDDR of 2.5. U is defined as U=(1/MDDR−1)/(TDDR1/2−1), wherein TDDR is greater than 4 at an end of the stretching region.
摘要:
Optical bodies are disclosed that include a first optical film, a second optical film and at least one rough strippable boundary layer disposed between the first and second optical films. Also disclosed are optical bodies including a strippable boundary layer disposed between the first and second optical films and including a first polymer and a second polymer that is substantially immiscible in the first polymer. The present disclosure also provides methods of processing optical bodies that include stretching the optical bodies.
摘要:
Optical bodies are disclosed that include an optical film and at least one rough strippable skin layer. The at least one rough strippable skin layer can include a continuous phase and a disperse phase. In some embodiments, the at least one rough strippable skin layer can include a first polymer, a second polymer different from the first polymer and an additional material that is substantially immiscible in at least one of the first and second polymers. In some exemplary embodiments, a surface of the at least one rough strippable skin layer adjacent to the optical film comprises a plurality of protrusions and the adjacent surface of the optical film comprises a plurality of asymmetric depressions substantially corresponding to said plurality of protrusions. Methods of making such exemplary optical bodies are also disclosed.
摘要:
The present disclosure pertains to a glide assembly for a watercraft float having a base with a bottom surface substantially mated to a watercraft receiving area of the float and a cavity, a glide member, an axle, and a securing mechanism allowing for the glide assembly to be positioned at different locations on the float, where the glide assembly reduces the amount of force required to receive and launch the watercraft.
摘要:
Stretched polymeric films can be used in a variety of applications, including optical applications. The stretching conditions and shape of the stretching tracks in a stretching apparatus can determine or influence film properties. Take-away systems can be used to receive the film after stretching. The configuration of the take-away system can, in at least some instances, influence final film properties.
摘要:
An optical body including an optical film, a first layer on a first major surface of the optical film, and a second layer on a second major surface of the optical film, wherein at least one of the first and second layers may include an adhesion-promoting layer that comprises a polycarbonate/polyester blend resin or a styrene copolymer. The present disclosure is also directed to an optical body wherein at least one of the first and second layers may include an imprint-resistant layer that comprises a polymer selected from the group consisting of crystalline polyesters, copolyesters, olefin homopolymers and olefin copolymers.
摘要:
A process for stretching films is described. The process preferably stretches films in a uniaxial fashion. Preferably, optical films are stretched including multilayer optical films. Other aspects of the invention include a roll of stretched film and an apparatus for stretching films.
摘要:
A watercraft float having a deck surface and bottom surface, a watercraft receiving area, a first post having a base, side, and top surface, wherein the first post is positioned on a first side of the watercraft receiving area, a second post having a base, side, and top surface, wherein the second post is positioned on a second side of the watercraft receiving area, and a railing, wherein the railing releaseably engages the two posts, wherein the base of the first post and the base of the second past are engaged to the deck surface, wherein each post is configured so that a user can propel a watercraft onto the float utilizing the post, and wherein the watercraft receiving area is configured to receive a watercraft.