Compositions and methods for aromatic polysulfone copolymers are described herein. The polysulfone copolymers have advantageous properties, particularly in terms of high glass transition temperatures (T.sub.g), improved thermal stability, improved flame resistance, good mechanical properties, chemical resistance and dimensional stability at elevated temperature. The polysulfone copolymers are suitable for manufacturing high temperature molded systems and other articles of manufacture via injection molding, extrusion, compression molding, coating, blow molding, thermoforming, rotational molding and additive manufacturing.

To provide a film or sheet and a screen excellent in visibility of a projected image, in see-through properties when an image is not projected and in bending resistance. A single-layer film or sheet comprising a fluororesin, a light-scattering agent and a light absorbing agent, characterized in that the light-scattering agent is at least one light-scattering agent selected from the group consisting of a titanium oxide-containing pigment, a zinc oxide-containing pigment and a cerium oxide-containing pigment, and the content thereof is from 0.01 to 0.175 g/m.sup.2, and the light absorbing agent is at least one light absorbing agent selected from the group consisting of carbon black, a black interference aluminum pigment, black iron oxide and titanium black, and the content thereof is from 0.0005 to 0.035 g/m.sup.2.

To provide a film or sheet and a screen excellent in visibility of a projected image, in see-through properties when an image is not projected and in bending resistance. A single-layer film or sheet comprising a fluororesin, a light-scattering agent and a light absorbing agent, characterized in that the light-scattering agent is at least one light-scattering agent selected from the group consisting of a titanium oxide-containing pigment, a zinc oxide-containing pigment and a cerium oxide-containing pigment, and the content thereof is from 0.01 to 0.175 g/m.sup.2, and the light absorbing agent is at least one light absorbing agent selected from the group consisting of carbon black, a black interference aluminum pigment, black iron oxide and titanium black, and the content thereof is from 0.0005 to 0.035 g/m.sup.2.

Thin, biocompatible, high-strength, composite materials are disclosed that are suitable for use in a prosthetic valve for regulating blood flow direction. In one aspect, the leaflet material maintains flexibility in high-cycle flexural applications, making it particularly applicable to high-flex implants such as a prosthetic heart valve leaflet. The leaflet material includes a coherent single layer and an elastomer, wherein the elastomer is present in the pores of the porous coherent single layer.

Thin, biocompatible, high-strength, composite materials are disclosed that are suitable for use in a prosthetic valve for regulating blood flow direction. In one aspect, the leaflet material maintains flexibility in high-cycle flexural applications, making it particularly applicable to high-flex implants such as a prosthetic heart valve leaflet. The leaflet material includes a coherent single layer and an elastomer, wherein the elastomer is present in the pores of the porous coherent single layer.

The present invention relates to a method of producing a powder coating material containing a fluororesin and a non-fluororesin. The method of producing a powder coating material includes kneading a raw material containing the fluororesin and the non-fluororesin with a kneading extruder equipped with a screw having a kneading zone, wherein a ratio of a length L.sub.K of the kneading zone to an effective length L.sub.S of the screw (L.sub.K/L.sub.S×100) is 21.0 to 50.0%.

The present invention relates to a method of producing a powder coating material containing a fluororesin and a non-fluororesin. The method of producing a powder coating material includes kneading a raw material containing the fluororesin and the non-fluororesin with a kneading extruder equipped with a screw having a kneading zone, wherein a ratio of a length L.sub.K of the kneading zone to an effective length L.sub.S of the screw (L.sub.K/L.sub.S×100) is 21.0 to 50.0%.

A powder composition containing an aromatic polyetherketone resin (I) and a fluorine-containing copolymer (II). The powder composition has a ratio r2/r1 of 1.60 or lower, wherein r1 represents an average dispersed particle size of the fluorine-containing copolymer (II) and r2 represents an average dispersed particle size of the fluorine-containing copolymer (II) after melt flow rate measurement at 380° C. and a load of 5000 g with 5-minute pre-heating in conformity with ASTM D1238.

A resin composition includes: a copolymer including a fluoroolefin unit and a monomer unit having a hydroxy group; and an esterified cellulose resin; in which the amount of the esterified cellulose resin is from 0.2 to 9 parts by mass with respect to 100 parts by mass of the copolymer including a fluoroolefin unit and a monomer unit having a hydroxy group. A layered body includes a coating film formed from the resin composition.

The present invention provides: a polyimide composite powder which includes 1-30 wt % of a fluorine-based resin filler, and has excellent low dielectric properties; and a production method using water as a dispersion medium. Also provided are a molded body including the polyimide composite powder, and a method for producing same.