In an example, a method for forming a composite part includes, based on a part specification, cutting layers of material in a sequence and positioning the layers to form a stack. For each layer, after positioning the layer and before cutting a next layer in the sequence, the method includes (i) scanning along a length of the layer to determine an image, (ii) determining, based on the image, at least two edges of the layer, (iii) determining, based on the edges, a measured width at locations along the length of the layer, (iv) comparing the measured width at each location to a target width at the location, (v) deciding, based on the comparison, whether to adjust the production process, and (vi) if the decision is to adjust the production process, then adjusting the production process based on the comparison. The part specification specifies the target width at each location.

A piston for a heavy duty diesel engine including a composite layer forming at least a portion of a combustion surface is provided. The composite layer has a thickness greater than 500 microns and includes a mixture of components typically used to form brake pads, such as a thermoset resin, an insulating component, strengthening fibers, and an impact toughening additive. According to one example, the thermoset resin is a phenolic resin, the insulating component is a ceramic, the strengthening fibers are graphite, and the impact toughening additive is an aramid pulp of fibrillated chopped synthetic fibers. The composite layer also has a thermal conductivity of 0.8 to 5 W/m.Math.K. The body portion of the piston can include an undercut scroll thread to improve mechanical locking of the composite layer. The piston can also include a ceramic insert between the body portion and the composite layer.

The present invention is a film capacitor comprising a dielectric film and a metal layer, the dielectric film being a resin film obtained by stretching an unstretched film produced using a crystalline hydrogenated dicyclopentadiene ring-opening polymer, and heating the resulting stretched film, and the resin film having a softening point of 250 to 320 C., a thermal shrinkage ratio of 0.01 to 5.0% when heated at 200 C. for 10 minutes, a loss tangent (tan ) of 0.0001 to 0.0010, and a coefficient of static friction of 0.01 to 1.00. The present invention provides a film capacitor that includes a resin film as a dielectric film, the resin film exhibiting excellent heat resistance, excellent withstand voltage properties, and excellent workability.

A piston for a heavy duty diesel engine including a composite layer forming at least a portion of a combustion surface is provided. The composite layer has a thickness greater than 500 microns and includes a mixture of components typically used to form brake pads, such as a thermoset resin, an insulating component, strengthening fibers, and an impact toughening additive. According to one example, the thermoset resin is a phenolic resin, the insulating component is a ceramic, the strengthening fibers are graphite, and the impact toughening additive is an aramid pulp of fibrillated chopped synthetic fibers. The composite layer also has a thermal conductivity of 0.8 to 5 W/m.Math.K. The body portion of the piston can include an undercut scroll thread to improve mechanical locking of the composite layer. The piston can also include a ceramic insert between the body portion and the composite layer.

A resin film including a crystallizable polymer, wherein an in-plane retardation Re of the resin film is less than 5 nm, a thickness-direction retardation Rth of the resin film is less than 25 nm, and a haze HZ of the resin film is less than 3.0%.

Tubular polymeric structures are formed by creating a convex mold conforming to a fluid pathway design, depositing a coating of polymer over the mold, and in situ removing the mold without drawing it against the polymer. The resulting structures are fabricated with flow-altering features.

A transparent conductive film having a transparent resin film containing a cyclic olefin resin, an undercoating layer formed on the transparent resin film, and a conductive layer and having a thermal dimensional change rate in hot water at 100 C. for 60 seconds of from 0.01 to 0.2%, which shows excellent adhesion between the transparent resin film and the conductive layer.

The present invention is a method for producing a stretched film comprising stretching an unstretched film that is formed using a hydrogenated dicyclopentadiene ring-opening polymer at a temperature of 95 to 135 C. and a stretching ratio of 1.2 to 10, followed by heating at a temperature of 150 to 220 C. Since the thus-obtained stretched film has excellent transparency and low coefficient of linear expansion, the stretched film is suitable for not only use in optical applications but also use for electronic materials.

A transparent conductive film having a transparent resin film containing a cyclic olefin resin and a conductive layer and having a thermal dimensional change rate in hot water at 100 C. for 60 seconds of from 0.01 to 0.2%, shows excellent adhesion between the transparent resin film and the conductive layer.

The present invention relates to a polymer powder for the manufacture of articles by 3D printing, particularly by sintering, comprising a thermoplastic polymer and a particular antioxidant having improved stability and recyclability. The invention also relates to a process for preparing this powder and to the use thereof in a process for manufacturing by sintering, and to the articles manufactured from said powder.