To provide a film capable of suppressing both of formation of wrinkles when a release film is suction-attached to a cavity surface in compression molding, and formation of wrinkles when the cavity bottom surface to which the release film has been suction-attached is raised; and a method for producing a semiconductor element by using said film. A laminated film 1 comprises a layer 3 of shrinkable film, of which the storage elastic modulus E′ at 180° C. is at least 70 MPa, and the thermal shrinkage in 30 minutes at 180° C., with reference to 20° C., in each of the machine direction (MD) and the transverse direction (TD), is at least 3%, and a fluororesin layer 5 present on one side or both sides of the shrinkable film layer 3.

A method produces a fiber composite component for a motor vehicle. The method provides a semifinished fiber composite blank, wherein the semifinished fiber composite blank includes reinforcing fibers and a matrix material. The semifinished fiber composite blank is arranged between a first membrane and a second membrane. The semifinished fiber composite blank is shaped into a fiber composite molding by pressing the semifinished fiber composite blank together with the first membrane and the second membrane via a pressing device, and the fiber composite molding is consolidated.

A method produces a fiber composite component for a motor vehicle. The method provides a semifinished fiber composite blank, wherein the semifinished fiber composite blank includes reinforcing fibers and a matrix material. The semifinished fiber composite blank is arranged between a first membrane and a second membrane. The semifinished fiber composite blank is shaped into a fiber composite molding by pressing the semifinished fiber composite blank together with the first membrane and the second membrane via a pressing device, and the fiber composite molding is consolidated.

A production method of a composite material includes placing a fiber base material on a mold. The fiber base material includes a first fiber base material portion and a second fiber base material portion. The method further includes disposing a mold release member in part of a region where the first fiber base material portion and the second fiber base material portion are in contact with each other, and curing a resin with which the first fiber base material portion and the second fiber base material portion are impregnated, so as to mold the composite material.

A method for manufacturing thin, multi-bend optics includes placing an optical substrate and a protective sheet into a compression mold and closing the compression mold to deform the optical substrate and to deform the protective sheet. The optical substrate can include an optical surface and the protective sheet can be disposed between the compression mold and the optical surface of the optical substrate. The compression mold can include a mold contact surface that is characterized by a surface roughness. The compression mold can be held in a closed position for a compression time period, during which, the protective sheet contacts the mold contact surface and provides a buffer layer between the mold contact surface and the optical surface thereby mitigating against transfer of the surface roughness of the mold contact surface onto the optical surface.

Disclosed is a mold release film that is to be placed between a stock solution that serves as a raw material for artificial marble and a shaping apparatus when the stock solution is fed to the shaping apparatus, and then solidified and molded. The mold release film is a polyvinyl alcohol film and is characterized by being a polyvinyl alcohol mold release film for artificial marble molding use that satisfies the following formula (1). Due to this, it is possible to provide a polyvinyl alcohol mold release film for artificial marble molding use capable of, even in the production of wide artificial marble, suppressing wrinkles or curls generated at both end parts to prevent the surface shape of the resulting artificial marble from being defective, and simplifying the step of grinding and polishing artificial marble, and a method for producing artificial marble using the same.

4.6×10.sup.−3≥Δn(MD).sub.0−1.4×10.sup.−3≥Δn(TD).sub.0≥1.0×10.sup.−3  (1) in the formula (1), Δn(MD).sub.0 represents a value determined from a birefringence index of the polyvinyl alcohol mold release film in the machine direction at the center part of the transverse direction of the film by averaging the birefringence index along the thickness direction of the film, and Δn(TD).sub.0 represents a value determined from a birefringence index of the polyvinyl alcohol mold release film in the transverse direction at the center part of the transverse direction of the film by averaging the birefringence index along the thickness direction of the film.

Disclosed is a mold release film that is to be placed between a stock solution that serves as a raw material for artificial marble and a shaping apparatus when the stock solution is fed to the shaping apparatus, and then solidified and molded. The mold release film is a polyvinyl alcohol film and is characterized by being a polyvinyl alcohol mold release film for artificial marble molding use that satisfies the following formula (1). Due to this, it is possible to provide a polyvinyl alcohol mold release film for artificial marble molding use capable of, even in the production of wide artificial marble, suppressing wrinkles or curls generated at both end parts to prevent the surface shape of the resulting artificial marble from being defective, and simplifying the step of grinding and polishing artificial marble, and a method for producing artificial marble using the same.

4.6×10.sup.−3≥Δn(MD).sub.0−1.4×10.sup.−3≥Δn(TD).sub.0≥1.0×10.sup.−3  (1) in the formula (1), Δn(MD).sub.0 represents a value determined from a birefringence index of the polyvinyl alcohol mold release film in the machine direction at the center part of the transverse direction of the film by averaging the birefringence index along the thickness direction of the film, and Δn(TD).sub.0 represents a value determined from a birefringence index of the polyvinyl alcohol mold release film in the transverse direction at the center part of the transverse direction of the film by averaging the birefringence index along the thickness direction of the film.

A heat-resistant release sheet of the present disclosure is a sheet formed of a single-layer heat-resistant resin film having a thickness of 35 pm or less, wherein the sheet is disposed between a compression bonding target and a thermocompression head at the time of thermocompression-bonding the compression bonding target by the thermocompression head to prevent fixation between the compression bonding target and the thermocompression head, and a heat-resistant resin forming the heat-resistant resin film has a melting point of 310° C. or higher and/or a glass transition temperature of 210° C. or higher. A use temperature of this heat-resistant release sheet can be, for example, 250° C. or higher. The heat-resistant release sheet of the present disclosure can more reliably meet a demand for an increase in thermocompression bonding temperature.

A heat-resistant release sheet of the present disclosure is a sheet formed of a single-layer heat-resistant resin film having a thickness of 35 pm or less, wherein the sheet is disposed between a compression bonding target and a thermocompression head at the time of thermocompression-bonding the compression bonding target by the thermocompression head to prevent fixation between the compression bonding target and the thermocompression head, and a heat-resistant resin forming the heat-resistant resin film has a melting point of 310° C. or higher and/or a glass transition temperature of 210° C. or higher. A use temperature of this heat-resistant release sheet can be, for example, 250° C. or higher. The heat-resistant release sheet of the present disclosure can more reliably meet a demand for an increase in thermocompression bonding temperature.

A heat-resistant release sheet includes a heat-resistant release sheet to be disposed between a compression bonding target and a thermocompression head at the time of thermocompression-bonding the compression bonding target by the thermocompression head to prevent fixation between the compression bonding target and the thermocompression head, wherein surface hardness, as expressed in an indentation degree A.sub.300 given by an equation A.sub.300 (%)=(d.sub.300/t.sub.0)×100, of the heat-resistant release sheet at 300° C. is 15% or less, where to is a thickness of the heat-resistant release sheet at ordinary temperature (20° C.) and d.sub.300 is an indentation depth evaluated for the heat-resistant release sheet at 300° C. using a penetration probe by thermomechanical analysis (TMA) under the following measurement conditions: • Measurement mode: penetration mode, temperature rise measurement—Shape and tip diameter of penetration probe: columnar shape and 1 mmφ •Applied pressure: 1 MPa—Starting temperature and temperature increase rate: 20° C. and 10° C./min.