A fiber-reinforced composite material having at least one reinforcement layer having one or more woven mats, unwoven mats, or bundle of fibers comprising a plurality of reinforcement fibers that has a binder-resin filling at least a portion of the voids of the reinforcement fibers. In some aspects, the binder-resin adheres to the reinforcement fibers and displaces the air voids at the interface between the reinforcement fibers and the binder-resin. The binder-resin has a relatively low viscosity less than at least about 20,000 centipoise at 176 C. and low molecular weight, which allows the reinforcement layer to maintain a low flex modulus while maintaining or increasing tensile modulus. The fiber-reinforced composite material can be utilized in various articles, such as a flexible fiber reinforced hose adapted for conveying fluids under pressure having at least one polymer layer that bonds to the binder-resin of the reinforcement layer, preferably being cross-linkable or cross-linked to the polymer layer.

Described herein are optically transparent and semipermeable windows composed of at least one layer of an amorphous crosslinked fluorinated copolymer. Also disclosed are a process and apparatus for three-dimensional continuous liquid interface production (CLIP) printing using the windows described herein. The amorphous crosslinked fluorinated copolymers have improved mechanical properties, thereby reducing the susceptibility of the window to brittle failures such as cracking and crack propagation. The gas permeable windows have superior durability and reliability compared with other available structures and compositions.

Provided is a process for producing a polymeric piezoelectric material including a first step of heating a sheet in an amorphous state containing the helical chiral polymer to obtain a pre-crystallized sheet, and a second step of stretching the pre-crystallized sheet in biaxial directions, wherein the polymeric piezoelectric material includes a helical chiral polymer having a weight-average molecular weight of from 50,000 to 1,000,000 and having optical activity, wherein a crystallinity of the material measured by a DSC method is from 20% to 80%, and a product of a standardized molecular orientation MORc measured by a microwave transmission type molecular orientation meter based on a reference thickness of 50 m and the crystallinity is from 25 to 250.

An optical layered body including a substrate layer and a first surface layer, wherein the substrate layer includes a polymer containing an amorphous alicyclic structure, and the first surface layer includes a polymer containing a crystallizable alicyclic structure; a polarizing plate including such an optical layered body and a polarizer; and a liquid crystal display device including such a polarizing plate. Preferably, the optical layered body has a specific retardation, the first surface layer has a specific thickness, and the polymer containing a crystallizable alicyclic structure is a hydrogenated product of a ring-opened polymer of dicyclopentadiene.

A method of processing a continuous sheet of polymer material. The method includes routing the continuous sheet of polymer material from a first spool and along at least a first heated roller and a second heated roller, heating the continuous sheet of polymer material to a first temperature on the first heated roller and the second heated roller, and controlling a rotational speed of the first heated roller and the second heated roller such that the continuous sheet of polymer material is stretched when routed from the second heated roller to the first heated roller.

The present invention provides a PA10T molding composite material that can be used to produce LED display light source reflection supports. The width of the crystallization peak at half maximum T.sub.1/2 is adjusted to be 3-10 C., the whiteness is adjusted to be less than 26, and the 460 nm light source reflectivity is adjusted to be less than 6.5%, such that the PA 10T molding composite material has the advantages of low blue light, high contrast, and high gray scale, and can satisfy requirements for a packaging process and long-term reliability, and can be used as a packaging product to manufacture high-contrast LED display light source refection supports applicable in multiple scenarios.

A method for producing a polylactic acid (PLA) shaped article by thermoforming and thermoformed PLA articles. The method for producing a shaped article includes: heating a sheet of crystallizable polylactic acid (PLA)-based resin having a ratio of cold crystallization over total melting enthalpy (Hcc/Hm) greater than 0.70 as determined by differential scanning calorimetry (DSC), wherein heating includes a heating step the sheet is heated from a surface temperature of at most 80 C. to a surface temperature of at least 90 C. to at most 150 C. at heating rate of 5 C. to 25 C. per second, to provide heated sheet having a ratio of cold crystallization over total melting enthalpy (Hcc/Hm) greater than 0.5 as determined by DSC; and immediately after heating, forming heated sheet to provide a shaped article by means of a mold having a temperature of at least 70 C. and at most 120 C.

A multilayer polymer structure includes a supporting layer and a first surface layer. The supporting layer includes polyethylene terephthalate. The supporting layer has a melting point of 235 to 252 degrees Celsius. The first surface layer is located on a first surface of the support layer and includes amorphous polyethylene terephthalate.

Embodiments of the present disclosure provide a recoil pad making method and a method of using the same. According to certain embodiments, a recoil pad making method includes the steps of providing a base member attached to a first portion of a cushion member, shaping an amorphous hardening material on a first surface of the first portion to form a second portion of the cushion member, and shaping, prior to hardening of the amorphous hardening material, the amorphous hardening material around a portion of a shoulder of a user to create a second surface of the second portion that has a shoulder facing contour that matches a contour of the portion of the shoulder. The base member configured to be mounted to a buttstock of a gun. The first portion of the cushion member is pre-cured on the base member.

A method for manufacturing a handle, a connector, and a head by injection molding at least a part of the handle having a distal end and a proximal end comprising a hollow portion opposite the distal end. At least a part of the connector having an outer lateral surface and a recess therein by injection molding with the recess forming a cavity within the connector. A spring-loaded ball-snap element is provided that with a ball and a spring configured to apply a radial force onto the ball. The spring-loaded ball-snap element is inserted into the cavity of the connector and the spring-loaded ball-snap element is fixed therein. At least a part of the head is injection molded. The connector is inserted into the hollow portion of the handle and the connector and fixed. The ball is extended slightly beyond the connector's outer lateral surface surrounding the ball.